CN105818405B - A method of forming lens on the shell of wearable device - Google Patents
A method of forming lens on the shell of wearable device Download PDFInfo
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- CN105818405B CN105818405B CN201610249099.8A CN201610249099A CN105818405B CN 105818405 B CN105818405 B CN 105818405B CN 201610249099 A CN201610249099 A CN 201610249099A CN 105818405 B CN105818405 B CN 105818405B
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Eyeglasses (AREA)
Abstract
The method that this application provides a kind of to form lens on the shell of wearable device, including even number through-hole is formed on the shell；Fill transparent colloid in the through hole, the transparent colloid can be cured molding；By the transparent colloid curing molding in through-hole.Present applicant proposes a kind of new methods that lens are formed on hard material shell, fill through-hole by curable molding transparent colloid, carry out being formed by curing lens later.Compared with the prior art, the method in the application greatly simplified the formation process of lens, and be capable of forming surfacing, and the lens seamless with the tight silk of shell, eliminates defect in the prior art, improves properties of product.
Description
Technical field
This application involves lens manufacturing field more particularly to a kind of forming methods of the lens for wearable device.
Background technique
With the rapid development of semiconductor technology, have been able to realize the health by wearable device to people now
Situation is monitored, and principle is by detecting the data such as body temperature, blood pressure, heart rate, the pulse of people and based on data analysis and measurement
The health condition of human body out.Usually above-mentioned data needs are obtained by corresponding sensor, such as heart rate, blood pressure, blood oxygen sensor,
This kind of sensor acquisition data needs are completed by light, such as infrared ray.Therefore, it is necessary to accomplish one group on device housings
The small lens of size have isolation between each other, realize the separation optical path of transmitting, receiving end light passed through.It is set due to wearable
Standby volume is usually smaller, in contrast smaller with the area of human contact, therefore, how to integrate on hard material shell
Locally transparent area with realize light penetrate function, and have simultaneously water proof and dust proof sealing effect technology be this field pass
Key technology.
Realizing a method of above-mentioned function in the prior art is: using gum mode, first begins a theatrical performance rank on hard material
Hole；It is again the glass perhaps transparent wears such as PMMA material CNC or the separately formed lens of impact style by material；By lens
Assembly is pasted on stepped hole, as shown in Figure 1.However this method is there are a serious defect, i.e., lens and stepped hole it
Between there are larger gaps, cause light to be distorted, thus influence sensor acquisition data accuracy.Even if being filled out later using dispensing
Fill gap, reuse polishing process for surface rubbing, but because glue when color category is restricted and ground plastic housing cooperates by
To constraint, simultaneously because the material of glue is different with the material of lens, the reflectivity and refractive index of the two are had differences, can not be thorough
Solve the problems, such as this.
Another method in the prior art is: being for bottom-layer skin substrate can be with the outer of the plastic material of injection molding
Dijection injection molding manner machine-shaping can be used in shell: first using injection molding or separately formed mode, lens being placed on mould
In tool, then the one circle light-proof material plastic cement of injection molding around, optical path partition and support lensing are played, as shown in Figure 2.However
This method can not be suitable for being the hard materials such as metal, ceramics to ground shell.
Another method is additionally provided in the prior art: lens group is first integrated into the monomer of a regular shape, is being carried on the back
Upper one layer of face printing, every photosphere, this big lens arrangement is processed on stepped hole on the shell.This method exists
Following defects: emit, receiving light path can reflect reflection in lens, it is completely isolated to cannot achieve.
Therefore, it needs to propose that a kind of method solves the above problems.
Summary of the invention
One of the technical issues of the application solves is to provide a kind of method that lens are formed on the shell of wearable device,
Include:
Through-hole is formed on the shell；
Fill transparent colloid in the through hole, the transparent colloid can be cured molding；
By the transparent colloid curing molding in through-hole.
According to one embodiment of present invention, wherein the number at least two of the lens.
According to one embodiment of present invention, wherein the method for forming through-hole on the shell is to use computer numerical control machine
Bed processing or laser beam perforation.
According to one embodiment of present invention, wherein in the through hole before filling transparent colloid further include: in through-hole
Side supported using butt, it is excessive for avoiding the mobility due to fluent material from causing.
According to one embodiment of present invention, wherein the region of butt exposure from through-hole has protrusion, for making
The transparent colloid of curing molding is to through-hole sunken inside.
According to one embodiment of present invention, wherein the region of butt exposure from through-hole has recess, for making
The transparent colloid of curing molding is prominent to outside through-hole.
According to one embodiment of present invention, wherein raised or sunken for hemispherical on the butt.
According to one embodiment of present invention, wherein the region of butt exposure from through-hole has multiple convex annulars
It rises, the center of circle of the annular projection is the geometric center point of through-hole.
According to one embodiment of present invention, wherein after the transparent colloid curing molding in through-hole further include: removing
The butt supported is done behind.
According to one embodiment of present invention, wherein the material for forming the butt has high surface energy, can not be cured
Transparent colloid bonding afterwards.
According to one embodiment of present invention, wherein after the transparent colloid curing molding in through-hole further include: use
Transparent colloid after processing of surface polishing removal solidifies overflows the part for being higher than surface.
According to one embodiment of present invention, wherein the cross-sectional area in the middle part of the through-hole is greater than the transversal of lens both ends
Area.
According to one embodiment of present invention, wherein the through-hole surfaces tool is rough rough surface.
According to one embodiment of present invention, wherein transparent colloid volume during cured constantly increases, directly
To being fully cured.Correspondingly, the present invention also provides a kind of shells for wearable device, comprising: jointless mosaic is in described
The lens being isolated from each other by shell in shell；The lens run through the shell along outer casing thickness direction.
According to one embodiment of present invention, wherein the number at least two of the lens.
According to one embodiment of present invention, wherein the lens are located at one end on the inside of shell with outside protrusion.
According to one embodiment of present invention, wherein one end that the lens are located at outer side of shell has inside recess.
According to one embodiment of present invention, wherein the raised or sunken of the lens is hemispherical.
According to one embodiment of present invention, wherein the lens are located at the end surface on the inside of shell with multiple rings
Shape protrusion, the center of circle of the annular projection are the geometric center point of lens.
According to one embodiment of present invention, wherein the cross-sectional area in the middle part of the lens is greater than the transversal of lens both ends
Area.
According to one embodiment of present invention, wherein the through-hole surfaces tool is rough rough surface.
According to one embodiment of present invention, wherein transparent colloid volume during cured constantly increases, directly
To being fully cured.
Present applicant proposes a kind of new methods that lens are formed on hard material shell, by curable molding
Gelatin body fills through-hole, carries out being formed by curing lens later.The method provided through the invention can be with simple technique saturating
The surface that mirror is located on the inside of shell forms protrusion or Fresnel Lenses, being capable of preferably optically focused；And it is located at outside shell in lens
The surface of side forms recess, and lens is avoided to wear.Meanwhile it being embedded in the shape of lens as class spindle in shell, Neng Gouyou
Effect avoids lens from falling off from shell.Compared with the prior art, the method in the application greatly simplified the formation of lens
Technique, and it is capable of forming surfacing, and the lens seamless with the tight silk of shell, defect in the prior art is eliminated, is improved
Properties of product.
Those of ordinary skill in the art will understand that although following detailed description carries out referenced in schematic embodiment, attached drawing,
But the application is not limited to these embodiments.But scope of the present application is extensive, and is intended to only through appended right
It is required that limiting scope of the present application.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 to Fig. 2 is the lens schematic diagram that two different methods in the prior art are formed；
Fig. 3 to Fig. 7 is according to an embodiment of the present application in one lens forming method, shell and lens in different step
Schematic diagram；
Fig. 8 is the signal of shell and lens in different step according to an embodiment of the present application in two lens forming method
Figure；
Fig. 9 is the signal of shell and lens in different step according to an embodiment of the present application in three lens forming method
Figure；
Figure 10 is the signal of shell and lens in different step according to an embodiment of the present application in four lens forming method
Figure；
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to implementation of the invention
Example is described in detail.Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated phases
Same or similar element or element with the same or similar functions.Embodiment below with reference to attached drawing description is exemplary
, for explaining only the invention, and it is not construed as limiting the claims.
With reference first to Fig. 7 (a), the shell 300 for wearable device of the offer of the embodiment of the present invention one, packet are provided
It includes: the lens 330 that by shell are isolated from each other of the jointless mosaic in the shell 300；The lens are passed through along outer casing thickness direction
Wear the shell.Preferably, one end that the lens 330 are located at 300 inside of shell has outside protrusion, in the present embodiment
In, the protrusion is hemispherical.
Preferably, the number at least two of the lens 330, for constituting light sensor transmitting and receiving light
Access.For opaque outer, need aperture on the shell to constitute passage of light, it is contemplated that the leakproofness of equipment, it is necessary to
The aperture is backfilled using transparent material.In order to avoid interfering the standard for influencing sensor acquisition data between different light
True property, it is necessary to individually be equipped with an access for the light that each sensor sends and receives.Therefore, lens 330 on shell
Number be preferably even number.
Fig. 7 (b) shows another structure of the shell for wearable device in embodiment one: the lens 330
Flush of two surfaces with shell 300.
It is carried out specifically below in conjunction with manufacturing method of the attached drawing to the shell for wearable device in embodiment one
It is bright.Specifically, method includes the following steps:
Through-hole 310 is formed on shell 300；
Transparent colloid 320 is filled in the through-hole 310, the transparent colloid 320 can be cured molding；
By 320 curing molding of transparent colloid in through-hole 310.
Above-mentioned steps will be described in detail below.
Firstly, providing shell.With reference to attached drawing 3 (a), a kind of top view of circular housing 300, the process shell are provided
Material can be hard material, such as one of ceramics, metal, glass or a variety of combinations；It is also possible to flexible material, such as
Plastics, organic film etc..It should be noted that.In other embodiments, the shape of the hard shell is not limited to circle, can also
To be one of triangle, rectangle, polygon or other irregular shapes.Fig. 3 (b) is that the shell in Fig. 3 (a) is square along AA '
To sectional view.
Next, forming through-hole 310 on hard material shell 300, as shown in Figure 4.The through-hole 310 is through described outer
Shell 300, in general, the section of the through-hole 310 is circle, sectional view such as Fig. 4 (b) institute as shown in Fig. 4 (a), along the direction AA '
Show.Wherein, the diameter of the through-hole 310 is configured according to the passage of light that sensor in practical application needs.In the present invention
In, the method that through-hole is formed on hard material shell be using cnc machine tool processing or laser beam perforation, therefore can be with
The minimum diameter for controlling the through-hole 310 reaches 2mm, can produce various sizes of through-hole according to practical situations to accord with
Close requirement of the various types of sensor for passage of light.Specifically, the method for forming through-hole on shell 300 is to make
With cnc machine tool processing or laser beam perforation, the technique and method of perforation are common technical means in the art, herein not
It repeats again.
Preferably, 310 surface of the through-hole tool is rough rough surface, can make lens 330 and shell 300 more
Good engaging, makes the better tightness of shell 300, is suitable for water proof equipment.Specifically, the method that wet etching can be used,
Above-mentioned rough coarse structure is formed on 310 side wall of through-hole.Preferably, after forming through-hole 310, into through-hole
Before filling transparent colloid 330, further includes: form butt 320 in the side of through-hole 310 and support, for avoiding due to transparent
Liquid spill caused by the mobility of colloid 330.In the art, the transparent colloid 330 of lens is formed for filling through-hole 310
The characteristics of can be cured molding, and the present invention exactly utilizes fluent material curable molding, uses through-hole 310 as the liquid material
The molding die of material, to be formed and the identical transparent solid material conduct of 310 shape of through-hole after fluent material solidification
Lens.In general, the transparent colloid 330 for capableing of curing molding is electron pouring sealant, specifically, can be organic silica gel, wink
One of dry glue, epoxide-resin glue, ultraviolet cured adhesive or a variety of combinations.Ultraviolet cured adhesive is used in the present embodiment
The formation of lens is illustrated for (i.e. UV glue).
Since the coefficient of viscosity and mobility of different electron pouring sealants are different, glue lesser for the coefficient of viscosity,
It can not be formed in the through-hole 310 of both ends open, it is therefore desirable to butt 320 is formed in the side opening of through-hole 310, for keeping away
Exempt from liquid spill.Wherein, the material of the butt as support has high surface energy, the electron pouring sealant after can not being cured
Bonding, as surface is coated with the PC thin slice and other materials with same characteristics of silica-base material layer.
Next, as shown in fig. 6, fill transparent colloid 330 in the through-hole 310, i.e., conductive casting glue.Specifically fill out
Filling method is dispensing, can be completed by automatic glue filling machine.The step for be also common technical means in the art, it is no longer superfluous herein
It states.
Next, the transparent colloid 330 in through-hole 310 is carried out curing molding.Specifically, according to different conductive encapsulatings
The condition of cure of glue carries out process operation.By taking ultraviolet cured adhesive as an example, need to irradiate shell 300 in ultraviolet light environments,
The light specifically irradiated can be the ultraviolet light that wavelength is 365nm-400nm, or be shone using illumination with high-pressure sodium lamp
It penetrates, when illumination, which need to confirm light really, can shine through to colloid, until colloid is fully cured, form lens.
Preferably, transparent colloid volume during cured constantly increases, until being fully cured.Since colloid exists
Gradually the volume during solidifying and setting is gradually increased, can with shell is closer is bonded, and one is generated to side wall
Fixed pressure, preferably realizes sealing function.
Finally, removing butt 320 of the through-hole side as support, that is, completes and form lens in hard shell 300.When
When through-hole 310 is filled up by the transparent colloid 330 of liquid, the surface of colloid 330 can due to surface tension effect and outwardly convex,
As shown in Fig. 7 (a), it is formed naturally convex lens, can preferably converge light.In order to avoid lens are ground in use
Damage, usually using the case surface where one end with lens protrusion as the inside of shell.
However, in some embodiments, the part of the prominent case surface of lens will affect the placement of other devices shell Nei,
Space in shell is occupied, it is therefore, in another embodiment, further comprising the steps of after removing bracket 320: to be thrown using surface
Transparent colloid after light technology removal solidifies overflows the part for being higher than surface, as shown in Fig. 7 (b).Specific can be of technique
Mechanical polishing etc. is learned, is no longer discussed in detail herein.
Compared with the prior art, the method in the application greatly simplified the formation process of lens, and be capable of forming table
Face is smooth, and the lens seamless with the tight silk of shell, eliminates defect in the prior art, improves properties of product.
Next, another embodiment of the invention is introduced by embodiment two.
In order to avoid the lens after solidifying are taken off from shell due to abrasion, vibration or other reasons during use
It falls, present embodiments provides another shell mechanism with anti-drop function, that is, form the fusiform through-hole structure of class, make through-hole
The cross-sectional area at middle part is greater than the cross-sectional area at lens both ends, so that the lens after solidifying also have same class spindle knot
Structure.Since the through-hole cross-sectional area of case surface opening is less than the cross-sectional area at middle part, lens can be only fastened on
In shell, avoid falling off from shell due to abrasion, vibration or other reasons.
Specifically, being formed on shell 800 along the section of depth method is the fusiform through-hole 800 of class with reference to Fig. 8 (a),
The rank street area in the middle part of the through-hole is set to be greater than the cross-sectional area at both ends.The specific method for forming through-hole can be anisotropy quarter
The combination of erosion and isotropic etching.Firstly, using anisotropic etching, such as cnc machine tool processing or laser beam perforation
Method forms the vertical through-hole of similar Fig. 4 (b) on shell 800, next, will be to vertical through-hole using individual character same sex etching
Side wall perform etching, so that it is recessed into shell 800, formed the class spindle-type α-Fe2O3 as shown in Fig. 8 (a).Specifically, described
Isotropic can be wet etching.
Next, filling transparent colloid 811 in through-hole 810, and its curing molding is formed into lens, such as Fig. 8 (b) institute
Show.Since the material of wet etching is different, being formed by recess has different shapes.Fig. 8 (c) and (d) show other can
The shape of through holes of energy, wherein the through-hole in Fig. 8 (c) can be formed by anisotropic etching and isotropic etching；Fig. 8 (d)
In through-hole can be formed by different directions anisotropic etching twice, specific lithographic method be any technique commonly known
Means, details are not described herein.
Next, another embodiment of the invention is introduced by embodiment three.
The surface of wearable device can gradually worn out in use, and this abrasion can form irregular in equipment surface
Scratch, for lens, this scratch can generate large effect to the propagation of light, to reduce respective sensor acquisition
The accuracy of data, therefore be used to that lens is avoided to generate abrasion in use this application provides a kind of method.
Specifically, with reference to Fig. 9, before filling transparent colloid in the through-hole 910, after the side use of through-hole 910
Support 920 supports, excessive due to caused by the mobility of fluent material for avoiding.Wherein, the butt 920 is from through-hole 910
The region of middle exposure has protrusion, as shown in Fig. 9 (a), for making the transparent colloid of curing molding to through-hole sunken inside.It is filling
After transparent colloid, since a part of space that the protrusion on butt 920 occupies through-hole 910 is ultimately formed as shown in Fig. 9 (b)
Lens shape such as Fig. 9 (c) shown in.
Wherein, the lens are located at the protrusion outside since surface tension is formed of one end on the inside of shell 900；Positioned at shell
The one end in outside then has inside recess.Can not only significantly more efficient convergence light, while can effectively avoid outer side of shell
Lens surface generate abrasion in use.
Next, another embodiment of the invention is introduced by example IV.
Fresnel Lenses also known as Fresnel lens, lens surface be smooth surface on one side, ascending concentric of another side imprinting
Circle, is a kind of effective light collecting device, can be used for the convex lens of infrared ray and visible light, spotlight effect is preferable and at low cost.This
The shape that invention can use butt forms Fresnel Lenses in lens surface.
Referring to Figure 10 (a), wherein the region of exposure has multiple annular protrusions, the ring from through-hole on butt 1020
The center of circle of shape protrusion is the geometric center point of through-hole.So that the molding transparent colloid 1030 that is cured connects with butt 1020
The surface of touching forms corresponding shape, as shown in Figure 10 (b), ultimately forms Fresnel Lenses.Wherein it is possible to according to actual needs
The shape of butt is designed, so as to adjust the light gathering of Fresnel Lenses.In practice, in order to avoid lens are worn,
Using the one side with Fresnel structure as on the inside of shell, outside of the recess as shell is formed on another side accordingly.Tool
The manufacturing method of body is referring to the description in embodiment one, and details are not described herein.
Present applicant proposes a kind of new methods that lens are formed on hard material shell, by curable molding
Gelatin body fills through-hole, carries out being formed by curing lens later.The method provided through the invention can be with simple technique saturating
The surface that mirror is located on the inside of shell forms protrusion or Fresnel Lenses, being capable of preferably optically focused；And it is located at outside shell in lens
The surface of side forms recess, and lens is avoided to wear.Meanwhile it being embedded in the shape of lens as class spindle in shell, Neng Gouyou
Effect avoids lens from falling off from shell.Compared with the prior art, the method in the application greatly simplified the formation of lens
Technique, and it is capable of forming surfacing, and the lens seamless with the tight silk of shell, defect in the prior art is eliminated, is improved
Properties of product.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in system claims is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (9)
1. a kind of method for forming lens on the shell of wearable device, comprising:
Through-hole is formed on the shell, and the cross-sectional area in the middle part of the through-hole is greater than the cross-sectional area at lens both ends, through-hole surfaces tool
There is rough rough surface；
It is supported in the side of through-hole using butt, it is excessive for avoiding the mobility due to fluent material from causing；
It is characterized in that,
The material for forming the butt has high surface energy, the transparent colloid bonding after can not being cured；
Fill transparent colloid in the through hole, the transparent colloid can be cured molding；
By the transparent colloid curing molding in through-hole.
2. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that described logical
The number at least two in hole.
3. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that in shell
The upper method for forming through-hole is using cnc machine tool processing or laser beam perforation.
4. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that after described
Holding in the palm the region of the exposure from through-hole has protrusion, for making the transparent colloid of curing molding to through-hole sunken inside.
5. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that after described
Holding in the palm the region of the exposure from through-hole has recess, for keeping the transparent colloid of curing molding prominent to outside through-hole.
6. the method according to any one of claim 4 or 5 for forming lens on the shell of wearable device, feature
It is, it is raised or sunken for hemispherical on the butt.
7. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that after described
Ask the region of the exposure from through-hole that there are multiple annular protrusions, the center of circle of the annular projection is the geometric center point of through-hole.
8. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that by through-hole
In transparent colloid curing molding after further include: removing do the butt supported behind.
9. the method according to claim 1 for forming lens on the shell of wearable device, which is characterized in that described
Gelatin body volume during cured constantly increases, until being fully cured.
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| CN116572121A (en) * | 2023-04-20 | 2023-08-11 | 伯恩光学(惠州)有限公司 | A kind of lens and its processing method and heart rate detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS574736A (en) * | 1980-06-12 | 1982-01-11 | Masao Horiguchi | Manufacture of large-sized fresnel lens |
| JPH01122431A (en) * | 1987-11-05 | 1989-05-15 | Sumita Kogaku Glass Seizosho:Kk | How to make plastic lenses |
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| US7794633B2 (en) * | 2008-11-26 | 2010-09-14 | Aptina Imaging Corporation | Method and apparatus for fabricating lens masters |
| EP2553503B1 (en) * | 2010-03-31 | 2018-12-19 | EV Group GmbH | Method and device for producing a micro-lens |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS574736A (en) * | 1980-06-12 | 1982-01-11 | Masao Horiguchi | Manufacture of large-sized fresnel lens |
| JPH01122431A (en) * | 1987-11-05 | 1989-05-15 | Sumita Kogaku Glass Seizosho:Kk | How to make plastic lenses |
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