CN2560962Y - Shading device - Google Patents

Abstract

A shading device is applied to an optical lens of an optical scanning module, and is provided with a lightproof soft lantern ring or a light barrier which is closely adjacent to the outer side of a sleeve so as to effectively shield stray light leaked from a gap.

Description

Shade

Technical field

The utility model relates to a kind of shade, particularly relates to a kind of being applied in the optical scanning module, avoids the shade of optical lens light leak.

Background technology

Input, processing and processing at image, become after a kind of popular interest, scanner just becomes many computer users' basic outfit, and it can be with the literal or the image document of file, magazine, books, picture etc., and scanning input computer is also handled.In various scanners, platform-type scanner is the most frequently used a kind of, and in platform-type scanner, the scan module moving mode of having pulled back since being is installed on transparent platform below, places file on the transparent platform with scanning.Scan module itself is not had power, therefore needs for example drive as gear trains such as servo motor, gear, belts.When desire uses a platform-type scanner to scan a file, file must be placed on the transparent platform, again the file cover plate be covered, smooth with the compressing file in transparent platform, scan then.

In existing optical scanning module (with reference to Fig. 1), comprise a light source 100, a reflector group 400, an optical lens 500, an optical sensor 600 (for example being charge coupled cell (CCD)) and a main body 700.Aforesaid light source 100, reflector group 400, optical lens 500, and optical sensor 600 etc. all are disposed in the main body 700.When scanning, light source 100 is that irradiation places the manuscript 200 on the light-passing board 300, obtains an image light through reflection or transmission.Reflector group 400 is combined by a plurality of catoptrons (401,402,403), and is configured on the optical path of image light, and it is manuscript 200 images can be imported in the reflector group 400, and the reflection of process reflector group 400 is resent to optical lens 500.Optical lens 500 is can receive the image light of the manuscript 200 that reflector group 400 transmitted and image in charge coupled cell 600.Wherein, can have the stationary installation of an optical lens in the main body 700, this stationary installation can have a sleeve cylindraceous usually, in order to fixed optics camera lens 500.

With reference to Fig. 2, existing optical lens stationary installation 800 is disposed at main body 700 inside, and one-body molded with main body 700.Optical lens stationary installation 800 is the base of an approximate trapezoid, its front end has the optical lens sleeve 810 of a hollow, in order to fixed optics camera lens 500, this sleeve 810 has a fixation spring tab 812 in the below, the inboard of this fixation spring tab 812 has a protruding rib 814, is used for pushing down the optical lens 500 that inserts fixing.This optical lens 500 can move along the axis direction of sleeve 810, to adjust lens focus.After having adjusted lens focus, method commonly used is to come solid certain optical lens 500 in the mode of a glue or fixed screw.So, by the locking of the resilient engagement screw of fixation spring tab 812, and protruding rib 814 and 500 of optical lens be and contact, and can adjust its shaft core position of location comparatively accurately.

As mentioned above, the general mode that promptly directly cooperates with axis hole directly with the optical lens 500 of circle, is fixedly arranged in the circular sleeve 810 of this stationary installation, shown in the front view of Fig. 3.Commonly used again just like shown in the 4th figure, sleeve 810 is designed to non-circular section shape, make 500 of sleeve 810 and optical lens form to put and contact (being 2 points among the figure), locate its shaft core position with more accurate adjustment.No matter yet be that a kind of mode, usually the internal diameter of sleeve 8 10 can be than the external diameter of optical lens 500 greatly in order to assembling, make 500 of sleeve 810 and optical lens form a gap 508 (hatched example areas among the 3rd, 4 figure), so can cause optical sensor 600 except receiving light source from camera lens 500, also can receive parasitic light (light leak) from aforementioned gap 508, cause the ghost phenomenon, influence the image quality of image.

The utility model content

For overcoming the defective of above-mentioned prior art structure, the purpose of this utility model is to propose a kind of shade, disposes the lighttight soft collar or a light barrier on optical lens, is in close proximity to the outside of sleeve, effectively to cover the spurious rays of being bled by the gap.

For achieving the above object, solution of the present utility model is to propose a kind of shade, be applied in the optical scanner module, optical scanning module comprises an optical lens and an optical lens stationary installation at least, the optical lens stationary installation has a sleeve, and the optical lens configuration is fixedly arranged in the sleeve, has a gap between optical lens and sleeve, it is characterized in that shade comprises:

One collar is sleeved on optical lens, is positioned at the sleeve outside, and the collar is at radially the width width greater than the gap.

Described shade, the material of the collar are lighttight soft materials.

Described shade, the material of the collar comprises rubber.

Described shade, the material of the collar comprises foam.

A kind of shade, be applied in the optical scanner module, optical scanning module comprises an optical lens and an optical lens stationary installation at least, the optical lens stationary installation has a sleeve, the optical lens configuration is fixedly arranged in the sleeve, have a gap between optical lens and sleeve, optical lens has a shell, and shade comprises:

One light barrier along optical lens radially, is formed on the shell, is positioned at the sleeve outside, and light barrier width diametrically is greater than the width in gap.

Described shade, light barrier and shell are one of the forming.

A kind of optical scanning module is applied in the optical scanner, and in order to scanning document, optical scanning module comprises at least:

One main body;

One light source is fixedly arranged on main body, in order to shot file, to obtain an image light;

One reflector group is fixedly arranged on main body, and is positioned on the light path of image light;

One optical lens stationary installation is fixedly arranged on main body;

One optical lens is disposed in the sleeve, has a gap between optical lens and sleeve, and optical lens is positioned on the light path of the image light after the reflector group reflection:

One collar is sleeved on optical lens, is positioned at the sleeve outside, and the collar is at radially the width width greater than the gap; And

One optical sensor is fixed in the shell, and is positioned on the light path behind the image transmittance optical lens.

Described optical scanning module, the material of the collar are lighttight soft materials.

Described optical scanning module, the material of the collar comprises rubber.

Described optical scanning module, the material of the collar comprises foam.

A kind of optical scanning module is applied in the optical scanner, and in order to scanning document, optical scanning module comprises at least:

One main body;

One light source is fixedly arranged on main body, gets an image light in order to shot file ， Yi Hu;

One reflector group is fixedly arranged on main body, and is positioned on the light path of image light;

One optical lens stationary installation is fixedly arranged on main body;

One optical lens is disposed in the sleeve, has a gap between optical lens and sleeve, and optical lens has a shell, and optical lens is positioned on the light path of the image light after the reflector group reflection;

One light barrier, light barrier along optical lens radially are formed on the shell, and are positioned at the sleeve outside, and light barrier is along radially the width width greater than the gap; And

One optical sensor is fixed in the shell, and is positioned on the light path behind the image transmittance optical lens.

Described optical scanning module, light barrier and shell are one of the forming.

Description of drawings

Fig. 1 illustrates the side schematic view of existing optical scanning module;

Fig. 2 illustrates the assembling stereogram of existing optical lens and sleeve;

Fig. 3 illustrates the front assembled view of existing optical lens and circular optics lens sleeve;

Fig. 4 illustrates the front assembled view of existing optical lens and non-circular optical lens sleeve;

Fig. 5 illustrates the side schematic view of the utility model first embodiment optical scanning module;

Fig. 6 illustrates the assembling stereogram of the first embodiment optical lens and sleeve;

Fig. 7 illustrates the exploded perspective view of the first embodiment optical lens and optical lens sleeve;

Fig. 8 illustrates the front assembled view of the first embodiment optical lens and optical lens sleeve;

Fig. 9 illustrates the exploded perspective view of the second embodiment optical lens and optical lens sleeve.

Embodiment first embodiment

Please refer to Fig. 5, be the floor map of the utility model preferred embodiment optical scanning module.Similarly, optical scanning module comprises a light source 1100, a reflector group 1400, an optical lens 1500, main body 1700 and an optical sensor, such as being charge coupled cell (CCD) 1600.Wherein, aforesaid light source 1100, reflector group 1400, optical lens 1500, and optical sensor 1600 etc. all are disposed in the main body 1700.When scanning, light source 1100 is that irradiation places the manuscript 1200 on the light-passing board 1300, obtains an image light 1110 through reflection or transmission.Reflector group 1400 is combined by a plurality of catoptrons (1401,1402,1403), and be disposed on the light path of image light 1110, it is manuscript 1200 images can be imported in the reflector group 1400, and the reflection of process reflector group 1400 is resent to optical lens 1500.Optical lens 1500 is can receive the image light 1110 of the manuscript 1200 that reflector group 1400 transmitted and image on the charge coupled cell 1600.

Similarly, as shown in Figure 6, have an optical lens stationary installation 1800 that is used to set firmly optical lens 1500 in the main body 1700, and this optical lens stationary installation 1800 has a sleeve 1810, optical lens 1500 promptly disposes and is installed in this sleeve 1810.The spurious rays of bleeding for the gap of covering 1500 of sleeve 1810 and optical lens, the utility model provides a collar 1900 as shade, as shown in Figure 7, this collar 1900 is sleeved on the optical lens 1500, when optical lens 1500 configurations are fixedly arranged in the sleeve 1810, the collar 1900 is in close proximity to the outside of sleeve 1810, because the collar 1900 width diametrically, width greater than the gap 1508 of 1500 of aforementioned sleeve 1810 and optical lens, shown in the front view of Fig. 8, so can fully cover the gap, enter to charge coupled cell in the gap thus, influence image quality to avoid parasitic light by this collar 1900.

Wherein, the material of the collar 1900 is lighttight flexible material, for example be rubber, foam etc., and shape is not limited to the circular of present embodiment, for cooperating the arbitrary shape of optical lens 1500 and sleeve 1900, for example shapes such as ellipse, triangle or other arbitrary polygons all are applicable to the utility model.Second embodiment

As shown in Figure 9, the utility model also one with the integrally formed light barrier 1910 of the shell 1510 of optical lens 1500 as shade.When optical lens 1500 configurations are installed in the sleeve 1810, light barrier 1910 is in close proximity to the outside of sleeve 1810, because of the width of light barrier 1910 width diametrically greater than the gap of 1810 in optical lens 1510 and sleeve, so, can utilize this light barrier 1910 to cover the parasitic light that may bleed by the gap as a shade.Again, light barrier 1910 is integrally formed with sleeve 1810/ optical lens stationary installation 1800.

Similarly, the shape of light barrier 1910 is not limited to the circular of present embodiment, can be the arbitrary shape that cooperates optical lens 1500 and sleeve 1900, and for example shapes such as ellipse, triangle or other arbitrary polygons all are applicable to the utility model.

In sum, the utility model adds a lighttight soft collar on optical lens, or forms a light barrier in integrally formed mode, is in close proximity to the outside of sleeve, can reach the effect of covering the spurious rays of being bled by the gap effectively.Yet, appoint the device for image that closes the applied optics camera lens, as long as it need cover the spurious rays of bleeding between optical lens and sleeve breasting face, can use shade of the present utility model.

According to the introduction of above-mentioned embodiment of the present utility model as can be known, the utility model has following advantage at least: add a lighttight soft collar on optical lens, or form a light barrier in integrally formed mode, be in close proximity to the outside of sleeve, can reach the effect of covering the spurious rays of bleeding effectively by the gap.

Claims (12)

1. A light-shielding device, applied in an optical scanner module, the optical scanning module at least includes an optical lens and an optical lens fixing device, the optical lens fixing device has a sleeve, and the optical lens configuration is fixed in the sleeve , there is a gap between the optical lens and the sleeve, characterized in that the shading device includes: A ring fits on the optical lens and is located outside the sleeve. The width of the ring in the radial direction is greater than the width of the gap. 2. The light-shielding device according to claim 1, wherein the collar is made of opaque soft material. 3. The shade device according to claim 2, wherein the material of the collar comprises rubber. 4. The shading device according to claim 2, wherein the material of the collar comprises foam. 5. A shading device, applied in an optical scanner module, the optical scanning module at least includes an optical lens and an optical lens fixing device, the optical lens fixing device has a sleeve, and the optical lens configuration is fixed on the sleeve Inside, there is a gap between the optical lens and the sleeve, the optical lens has a housing, and it is characterized in that the shading device includes: A light blocking plate is formed on the casing along the radial direction of the optical lens and is located outside the sleeve. The width of the light blocking plate in the radial direction is greater than the width of the gap. 6. The shading device according to claim 5, wherein the shading plate is integrally formed with the housing. 7. An optical scanning module used in an optical scanner to scan documents, characterized in that the optical scanning module at least includes: a subject; A light source, fixed on the main body, is used to irradiate the document to obtain an image light; A mirror group, fixed on the main body, and located on the optical path of the image light; An optical lens fixing device fixed on the main body; An optical lens is arranged in the sleeve, there is a gap between the optical lens and the sleeve, and the optical lens is located on the optical path of the image light reflected by the mirror group: a ring fitted on the optical lens and located outside the sleeve, the width of the ring in the radial direction is greater than the width of the gap; and An optical sensor is fixed in the casing and located on the light path after the image light passes through the optical lens. 8. The optical scanning module according to claim 7, wherein the collar is made of opaque soft material. 9. The optical scanning module as claimed in claim 8, wherein the material of the collar comprises rubber. 10. The optical scanning module as claimed in claim 8, wherein the material of the collar comprises foam. 11. An optical scanning module used in an optical scanner to scan documents, characterized in that the optical scanning module at least includes: a subject; A light source, fixed on the main body, is used to irradiate the document to obtain an image light; A mirror group, fixed on the main body, and located on the optical path of the image light; An optical lens fixing device fixed on the main body; An optical lens, arranged in the sleeve, there is a gap between the optical lens and the sleeve, the optical lens has a housing, and the optical lens is located on the optical path of the image light reflected by the mirror group; a light blocking plate, the light blocking plate is formed on the casing along the radial direction of the optical lens, and is located outside the sleeve, the width of the light blocking plate along the radial direction is greater than the width of the gap; and An optical sensor is fixed in the casing and located on the light path after the image light passes through the optical lens. 12. The optical scanning module according to claim 11, wherein the light baffle is integrally formed with the housing.

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