CN109491180A - A kind of scanning engine - Google Patents
A kind of scanning engine Download PDFInfo
- Publication number
- CN109491180A CN109491180A CN201811650861.9A CN201811650861A CN109491180A CN 109491180 A CN109491180 A CN 109491180A CN 201811650861 A CN201811650861 A CN 201811650861A CN 109491180 A CN109491180 A CN 109491180A
- Authority
- CN
- China
- Prior art keywords
- hole
- mould group
- fresnel lenses
- scanning engine
- front housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/06—Special arrangements of screening, diffusing, or reflecting devices, e.g. in studio
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
The present invention provides a kind of scanning engine, including a shell, with front and back opposite a first surface and a second surface；One light compensating lamp mould group is set to the first surface, to light filling；One camera lens is contained in the shell, to acquire bar code image；One imaging sensor is contained in the shell, is located at the camera lens rear, to convert digital signal for bar code image；One front housing, it is installed on the front end of the shell, the front housing has opposite a front surface and a rear surface, a recessed accepting hole facing forward is to accommodate the light compensating lamp mould group in the rear surface, one Fresnel Lenses is set to light-emitting angle of the front of the accepting hole to restrain the light compensating lamp mould group, to improve light filling brightness；The front end face of the Fresnel Lenses is concordant with the front surface of the front housing or recessed in the front surface, to reduce size.
Description
Technical field
The present invention relates to a kind of scanning engine, espespecially a kind of compact scanning engine for improving light filling brightness.
Background technique
A kind of existing engine module mainly includes procapsid, back casing, light compensating lamp and lens module；Light compensating lamp and camera lens
Mo Zu is located at respectively in two through-holes of procapsid；Since the light that light compensating lamp issues is more dispersed, cause brightness of illumination inadequate,
Under-exposure is easy to produce when scanning, particularly with apart from farther away bar code, this problem is especially prominent.
Generally use convex lens in the industry to collect illuminating ray to improve brightness, however convex lens thickness is larger, in height
Convex lens is arranged on integrated engine module frequently can lead to that engine module volume is larger, not meet becoming for engine module miniaturization
Gesture.
Summary of the invention
For background technique problem encountered, what the present invention created be designed to provide, and a kind of front housing is equipped with Fresnel
Lens are to restrain the scanning engine of light filling light.
To achieve the above object, invention uses following technological means:
The present invention provides a kind of scanning engine characterized by comprising
One shell, with front and back opposite a first surface and a second surface；
One light compensating lamp mould group is set to the first surface, to light filling；
One camera lens is contained in the shell, to acquire bar code image；
One imaging sensor is contained in the shell, is located at the camera lens rear, to convert number for bar code image
Signal；
One front housing is installed on the front end of the shell, and the front housing has opposite a front surface and a rear surface, described
A recessed accepting hole facing forward is to accommodate the light compensating lamp mould group in rear surface, before a Fresnel Lenses is set to the accepting hole
The front surface of light-emitting angle of the side to restrain the light compensating lamp mould group, the front end face of the Fresnel Lenses and the front housing is flat
It is neat or recessed in the front surface.
Optionally, the rear surface of the front housing fits in the first surface of the shell.
Optionally, the Fresnel Lenses is shaped in the front housing.
Optionally, the front housing is by transparent material injection molding, and the Fresnel Lenses integrated injection molding is before described
Shell.
Optionally, the front surface and the rear surface of the front housing are run through before and after a through-hole, the camera lens protrudes out
The first surface and it is contained in the through-hole, the camera lens is away from the front surface first distance, and the light compensating lamp mould group is away from institute
Front surface second distance is stated, the second distance is greater than the first distance.
Optionally, the accepting hole includes one first hole extended backwards by the Fresnel Lenses and by first hole
The second hole of the rear surface of the front housing is extended to, second hole is greater than first hole.
Optionally, first hole is circular hole to limit the circular Fresnel Lenses, and second hole is square hole,
The length in second hole is greater than the diameter in first hole.
Optionally, the light compensating lamp mould group includes a lamp holder and a Lamp cup, and the Lamp cup and the Fresnel Lenses cooperate
To restrain the light that the light compensating lamp mould group issues.
Optionally, the front end face of the Fresnel Lenses is plane and rear end face is fresnel surface, and the front end face is recessed
In the front surface.
Optionally, the visual field of the Fresnel Lenses restrains the light compensating lamp mould group illuminated field and the camera lens substantially weighs
It closes.
Compared with prior art, the invention has the following advantages:
The recessed accepting hole to accommodate the light compensating lamp mould group, the Fresnel Lenses are set in the rear surface of the front housing
Light filling brightness can be improved in front of the accepting hole；The front surface of the front end face of the Fresnel Lenses and the front housing is flat
It is neat or recessed in the front surface, it can avoid using the thicker convex lens of thickness and the prominent front surface, it is thus also avoided that increase
Add the scanning engine in the front-back direction size, cause convex lens surface be easy scratched, influence optical property.
Detailed description of the invention
Fig. 1 is the perspective view of scanning engine of the present invention；
Fig. 2 is the partially exploded diagram of scanning engine in Fig. 1；
Fig. 3 is the rearview of front housing in Fig. 1；
Fig. 4 is the perspective view of front housing in Fig. 1；
Fig. 5 is the perspective view of the other direction of front housing in Fig. 1；
Fig. 6 is the main view of Fig. 1；
Fig. 7 is the cross-sectional view in Fig. 6 along the direction A-A；
Fig. 8 is the cross-sectional view in Fig. 6 along the direction B-B.
The drawing reference numeral of specific embodiment illustrates:
Scanning engine 100；Shell 1；Foreboard 11；Shell 12；Back plate 13；First surface 14；Second surface 15；Camera lens 2；Figure
As sensor 3；Light compensating lamp mould group 4；Lamp holder 41；Lamp cup 42；Front housing 5；Front surface 51；Rear surface 52；Through-hole 53；Accepting hole 54；
First hole 541；Second hole 542；Fresnel Lenses 55；Front end face 551；Rear end face 552；First distance D1；Second distance D2.
Specific embodiment
Purpose, structure, feature and effect to facilitate the understanding of the present invention etc., now in conjunction with attached drawing and specific implementation
The invention will be further described for mode.
As depicted in figs. 1 and 2, scanning engine 100 of the present invention is substantially in cuboid-type, and main element includes a shell
1, a front housing 5, and it is contained in the shell 1 and the camera lens 2 and imaging sensor 3, one benefits in shell 5
4 He of light lamp mould group.
The shell 1 includes a foreboard 11, a shell 12, a back plate 13, and stacked assembly forms in fact three from front to back
Apply shell 1.The first surface 14 and second surface 15 that the shell 1 has front and back opposite, before the first surface 14 is described
The plate face facing forward of plate 11, the second surface 15 are the plate face of the back plate 13 backwards.The non-hollow structure of the shell 12 is to receive
Hold described image sensor 3 and the camera lens 2.
The camera lens 2 is bolted in the shell 12 and protrudes out the first surface 14 through the foreboard 11 forward,
For the camera lens 2 to acquire bar code (not shown, similarly hereinafter) image, it is facing forward that described image sensor 3 is installed on the back plate 13
Dead astern in plate face and positioned at the camera lens 2, to convert digital signal for the collected bar code image of the camera lens 2.
The light compensating lamp mould group 4 is set to the side for being installed on and being located at the camera lens 2 on the first surface 14 of the shell 1
Side.The light compensating lamp mould group 4 includes a lamp holder 41 and a Lamp cup 42 with the lamp holder 41 cooperation, and the lamp holder 41 is patch
Chip is simultaneously welded on the first surface 14.
Referring to figure 3. to shown in Fig. 6, the front housing 5 is described by transparent material injection molding, preferably acrylic material
Front housing 5 is installed on the front end of the shell 1, with opposite a front surface 51 and a rear surface 52.As shown in fig. 7,
The rear surface 52 fits in the first surface 14 (the i.e. described foreboard 11 plate face facing forward) of the shell 1, the front housing 5
The position of the upper correspondence camera lens 2 is equipped with a pre-and post perforative through-hole 53, and the camera lens 2 protrudes out the first surface 14
It is partially housed in the through-hole 53 and does not extend the front surface 51 of the front housing 5, it is described after taking away front housing 5
Camera lens 2 is to protrude out the first surface 14 of the shell 1 apart from farthest element, by the camera lens 2 away from the front surface
51 distance definition is first distance D1 (as shown in Figure 8).
Position one receipts of recessed formation facing forward of the light compensating lamp mould group 4 are corresponded in the rear surface 52 of the front housing 5
Hold hole 54, the front of the accepting hole 54 is equipped with a Fresnel Lenses 55 and 5 integrated injection molding of front housing, so that institute
Accepting hole 54 is stated as blind hole.The accepting hole 54 includes one circular first extended backwards by the Fresnel Lenses 55
Hole 541 and the second rectangular hole 542 that the rear surface 52 of the front housing 5 is extended to by first hole 541, it is described
The length in the second hole 542 is greater than the diameter in first hole 541 and its width is substantially equal to the diameter in first hole 541.Institute
The front end face 551 for stating Fresnel Lenses 55 is plane and rear end face 552 is the fresnel surface that multiple concentric Fresnel rings are formed,
The front end face 551 of the Fresnel Lenses 55 is recessed in the front surface 51 of the front housing 5, avoids thicker using thickness
Convex lens (not shown, similarly hereinafter) and the prominent front surface 51, had both increased the scanning engine 100 size in the front-back direction,
Cause convex lens surface to be easy to be scratched again, influences optical property；Meanwhile in the 100 front-rear direction size one of scanning engine
In the case where fixed, 55 thinner thickness of Fresnel Lenses, so that the accepting hole 54 has enough spaces to accommodate the benefit
Light lamp mould group 4.The visual field of illuminated field and the camera lens 2 that the Fresnel Lenses 55 restrains the light compensating lamp mould group 4 substantially weighs
It closes.The fresnel surface is arranged towards the accepting hole 54, and the accepting hole 54 forms one around the fresnel surface
A relatively closed region prevents from being infected with sundries on the fresnel surface and influencing optical property.
Please continue to refer to shown in Fig. 7, the lamp holder 41 of the light compensating lamp mould group 4 is contained in second hole 542 completely
Interior, 42 major part of Lamp cup is contained in second hole 542 and fraction extends into first hole 541, so that the lamp
Certain spacing is formed between cup 42 and the Fresnel Lenses 55, defines distance of the Lamp cup 42 apart from the front surface 51
For second distance D2, the second distance D2 is greater than the first distance D1 so that the Lamp cup 42 and the front surface 51 it
Between have enough spaces that the Fresnel Lenses 55 is set.The usually described light compensating lamp mould group 4 needs to buy from lamps and lanterns producer existing
Some products, rather than gone to customize the light compensating lamp mould group 4 according to the size of the scanning engine 100, to reduce cost.Setting
The various sizes of light compensating lamp mould group 4, same phase are installed so that there are enough spaces in larger-size second hole 542
Lesser first hole 541 is arranged to second hole 542 and avoids the described of thinner thickness to increase the stability of structure
Fresnel Lenses 55 is not easy injection molding or is easily damaged.
The Lamp cup 42 is in lens-shaped, plays the role of certain convergence, the Lamp cup 42 and the phenanthrene to light filling light
Nie Er lens 55 cooperatively restrain the light that the light compensating lamp mould group 4 issues, and limit the light-emitting angle of the light compensating lamp mould group 4
Between 55 ° to 65 °, preferably 60 °, so that the illuminated field that the light compensating lamp mould group 4 is formed through the Fresnel Lenses 55
Plane of the visual field formed with the camera lens 2 cooperation described image sensor 3 locating for bar code essentially coincides, preferably at least
95% is overlapped.
In the present embodiment, the Fresnel Lenses 55 is with the front housing 5 by identical material integrated injection molding；Other implementations
In example (not shown, similarly hereinafter), the Fresnel Lenses 55 can be separately formed, later again by the Fresnel Lenses 55 of forming
It is molded in the front housing 5.
100 integrated level of the scanning engine of the invention is high and size is smaller, is applicable to a variety of scanning means and (does not scheme
Show), such as handheld scanner, mobile data terminal (PDA), industrial formula scanning constant instrument.
In conclusion in structure provided by the invention, in the rear surface 52 forward the recessed accepting hole 54 to receive
Hold the light compensating lamp mould group 4, the Fresnel Lenses 55 is set to the front of the accepting hole 54 to restrain the light compensating lamp mould
The light-emitting angle of group 4, can be improved light filling brightness；The front surface of the front end face 551 of the Fresnel Lenses 55 and the front housing 5
51 is concordant or recessed in the front surface 51, can avoid using the thicker convex lens of thickness and the prominent front surface 51, also
Avoid increase the scanning engine in the front-back direction size, cause convex lens surface to be easy to be scratched, influence optical property；Together
When, in the case where the 100 front-rear direction size of scanning engine is certain, 55 thinner thickness of Fresnel Lenses, so that institute
Stating accepting hole 54 has enough spaces to accommodate the light compensating lamp mould group 4.
Detailed description above is only the explanation of the preferred embodiments of the invention, the scope of the patents that is non-therefore limiting to the present invention,
So all, with this creation specification and diagramatic content institute, equivalence techniques change for it, are both contained in the scope of the patents of this creation
It is interior.Detailed description above is only the explanation of the preferred embodiments of the invention, the scope of the patents that is non-therefore limiting to the present invention, so,
All with this creation specification and diagramatic content institute, equivalence techniques change for it, are both contained in the scope of the patents of this creation.
Claims (10)
1. a kind of scanning engine characterized by comprising
One shell, with front and back opposite a first surface and a second surface；
One light compensating lamp mould group is set to the first surface, to light filling；
One camera lens is contained in the shell, to acquire bar code image；
One imaging sensor is contained in the shell, is located at the camera lens rear, to convert digital letter for bar code image
Number；
One front housing, is installed on the front end of the shell, and the front housing has opposite a front surface and a rear surface, the rear table
A recessed accepting hole facing forward is used to accommodate the light compensating lamp mould group, the front that a Fresnel Lenses is set to the accepting hole on face
To restrain the light-emitting angle of the light compensating lamp mould group, the front end face of the Fresnel Lenses it is concordant with the front surface of the front housing or
It is recessed in the front surface.
2. scanning engine as described in claim 1, it is characterised in that: the rear surface of the front housing fits in the shell
The first surface.
3. scanning engine as described in claim 1, it is characterised in that: the Fresnel Lenses is shaped in the front housing.
4. scanning engine as claimed in claim 3, it is characterised in that: the front housing is by transparent material injection molding, the phenanthrene
Nie Er lens integrated injection molding is in the front housing.
5. scanning engine as described in claim 1, it is characterised in that: before and after a through-hole through the front surface of the front housing with after
Surface, the camera lens protrude out the first surface and are contained in the through-hole, and the light compensating lamp mould group is away from the front surface
Second distance, the first distance greater than the camera lens away from the front surface.
6. scanning engine as described in claim 1, it is characterised in that: the accepting hole include by the Fresnel Lenses backwards
Extend the first hole and extended to by first hole front housing the rear surface the second hole, second hole be greater than institute
State the first hole.
7. scanning engine as claimed in claim 7, it is characterised in that: first hole is that circular hole is circular described to limit
Fresnel Lenses, second hole are square hole, and the length in second hole is greater than the diameter in first hole.
8. scanning engine as described in claim 1, it is characterised in that: the light compensating lamp mould group includes a lamp holder and a Lamp cup,
The Lamp cup and Fresnel Lenses cooperation are to restrain the light that the light compensating lamp mould group issues.
9. scanning engine as described in claim 1, it is characterised in that: the front end face of the Fresnel Lenses is plane and rear end
Face is fresnel surface, and the front end face is recessed in the front surface of the front housing.
10. scanning engine as described in claim 1, it is characterised in that: the Fresnel Lenses restrains the light compensating lamp mould group
The visual field of illuminated field and the camera lens substantially overlap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811650861.9A CN109491180A (en) | 2018-12-31 | 2018-12-31 | A kind of scanning engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811650861.9A CN109491180A (en) | 2018-12-31 | 2018-12-31 | A kind of scanning engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109491180A true CN109491180A (en) | 2019-03-19 |
Family
ID=65713657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811650861.9A Pending CN109491180A (en) | 2018-12-31 | 2018-12-31 | A kind of scanning engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109491180A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02275597A (en) * | 1989-04-18 | 1990-11-09 | Sony Corp | Bar code reader |
| JPH11203383A (en) * | 1998-01-16 | 1999-07-30 | Denso Corp | Optical information reader |
| CN1476583A (en) * | 2000-11-27 | 2004-02-18 | ��ʽ������Э���������� | Card gate mechanism card reader |
| US20090272808A1 (en) * | 2008-04-30 | 2009-11-05 | Mark Drzymala | Imaging module with optical elements of one-piece construction |
| JP2014041639A (en) * | 2013-10-11 | 2014-03-06 | Keyence Corp | Optical information reading device, and setting device for optical information reading device |
-
2018
- 2018-12-31 CN CN201811650861.9A patent/CN109491180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02275597A (en) * | 1989-04-18 | 1990-11-09 | Sony Corp | Bar code reader |
| JPH11203383A (en) * | 1998-01-16 | 1999-07-30 | Denso Corp | Optical information reader |
| CN1476583A (en) * | 2000-11-27 | 2004-02-18 | ��ʽ������Э���������� | Card gate mechanism card reader |
| US20090272808A1 (en) * | 2008-04-30 | 2009-11-05 | Mark Drzymala | Imaging module with optical elements of one-piece construction |
| JP2014041639A (en) * | 2013-10-11 | 2014-03-06 | Keyence Corp | Optical information reading device, and setting device for optical information reading device |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190319 |
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| RJ01 | Rejection of invention patent application after publication |