CN112040081A

CN112040081A - Digital scanner

Info

Publication number: CN112040081A
Application number: CN202010930183.2A
Authority: CN
Inventors: 欧小春; 王伟新; 张学农
Original assignee: Hangzhou Ocean Computer Printing Co ltd
Current assignee: Hangzhou Ocean Computer Printing Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-12-04
Anticipated expiration: 2040-09-07
Also published as: CN112040081B

Abstract

The utility model relates to a digital scanner, it includes fixed frame, fixed frame includes the roof, bottom plate and connecting plate, the vertical setting of connecting plate, the perpendicular fixed connection of roof is on connecting plate lateral wall top, the perpendicular fixed connection of bottom plate is in connecting plate lateral wall bottom, and bottom plate and roof are located the same lateral wall of connecting plate, the fixed connection is used for the light receiver of scanning data under the roof, the bottom plate upper surface is provided with and is used for placing the thing board of putting of mucilage binding scanning piece, it is provided with the pneumatic cylinder that is used for driving to put the thing board and goes up and down to put between thing board and the bottom plate, it is provided with the transparent plate to put between thing board and the light receiver, transparent plate and connecting plate.

Description

Digital scanner

Technical Field

The application relates to the technical field of scanners, in particular to a digital scanner.

Background

The scanner is a device for capturing image, as a peripheral product of optical, mechanical and electrical integration computer, it can convert the image into digital format which can be displayed, edited, stored and output by computer, it is a very powerful input device, when the scanner is working, the strong light emitted by the scanner is irradiated on the manuscript, and the light which is not absorbed is reflected to the optical inductor. After receiving the signals, the light sensor transmits the signals to an analog-to-digital (A/D) converter, and the analog-to-digital converter converts the signals into signals which can be read by a computer and then converted into correct images which can be seen on a display through a driving program.

The existing scanner comprises a light sensation receiver, a converter, a support rod and a bottom plate, wherein the support rod is fixedly connected to the upper surface of the bottom plate, the light sensation receiver is communicated with the converter, the light sensation receiver is opposite to the upper surface of the bottom plate, books are placed on the upper surface of the bottom plate during use, the light sensation receiver is opposite to the books, and after scanning is completed, data are transmitted to a computer display through the converter after conversion, so that the whole using process is completed.

In view of the above-mentioned related technologies, the inventor believes that, because the working principle of the scanner is light reflection, when scanning the glued scanning piece, the scanned surface of the glued scanning piece is an arc surface, which may cause the reflected light to have deviation, and has the defect of accurate scanning information.

Disclosure of Invention

In order to solve the defects in the technical scheme, the application provides a digital scanner.

The application provides a digital scanner, adopts following technical scheme: the utility model provides a digital scanner, which comprises a fixed frame, fixed frame includes the roof, bottom plate and connecting plate, the vertical setting of connecting plate, the perpendicular fixed connection of roof is on connecting plate lateral wall top, the perpendicular fixed connection of bottom plate is in connecting plate lateral wall bottom, and bottom plate and roof are located the same lateral wall of connecting plate, the fixed surface is connected with the light sense receiver that is used for the scanned data under the roof, the bottom plate upper surface is provided with the thing board of putting that is used for placing mucilage binding scanning piece, it is provided with the pneumatic cylinder that is used for driving to put the thing board and goes up and down to put between thing board and the bottom plate.

Through adopting above-mentioned technical scheme, when using digital scanner scanning mucilage binding scanning piece, scanning piece is fixed to be placed at putting thing board upper surface with the mucilage binding, start the pneumatic cylinder, the pneumatic cylinder drives and puts the thing board and remove to one side that is close to the transparent plate, under the extrusion of putting thing board and transparent plate when the mucilage binding scanning piece with the transparent plate butt, the scanning face of mucilage binding scanning piece becomes under the pressure of putting thing board and transparent plate levelly and smoothly, thereby make things convenient for the photic receiver to receive the reverberation of scanning piece, thereby the accuracy of scanning information of mucilage binding scanning piece has been improved.

Preferably, put the thing board upper surface and offer the holding tank that is used for placing mucilage binding scanning piece mucilage binding part, the orientation of offering of holding tank is perpendicular with the connecting plate, is provided with the centre gripping subassembly that is used for pressing from both sides tight mucilage binding scanning piece in the holding tank.

Through adopting above-mentioned technical scheme, when using digital scanner to scan the mucilage binding scanning piece, place the mucilage binding part of mucilage binding scanning piece and fix in the holding tank in using the centre gripping subassembly, the mucilage binding part of mucilage binding scanning piece is hidden and is being accomodate the inslot at this moment, when putting thing board drive mucilage binding scanning piece and transparent plate butt, does not have the influence of mucilage binding part, has improved the roughness of scanning piece scanning face to scanning piece scanning information's accuracy has been improved.

Preferably, the centre gripping subassembly includes splint and cylinder, and splint are provided with two, and splint are pegged graft in the holding tank, and the length direction of splint is the same with the length direction of guide way, and the splint upper surface flushes with putting the thing board upper surface, and the cylinder is located the one side that splint deviate from each other, and the cylinder is used for adjusting the mutual distance between two splint.

Through adopting above-mentioned technical scheme, when using the tight mucilage binding part of gluing dress scanning piece of centre gripping subassembly clamp, start the cylinder, the cylinder drives splint and removes to one side that is close to gluing dress scanning piece, and the push pedal of both sides is tight with gluing dress scanning piece clamp to the stability of scanning piece has been increased, and then has improved the accuracy of scanning information.

Preferably, a page turning device for turning the glued scanning piece is arranged in the fixing frame, and the page turning device comprises an adsorption component for separating a single page of the glued scanning piece from the glued scanning piece and a pushing and pressing component for turning the single page.

Through adopting above-mentioned technical scheme, when putting thing board and moving mucilage binding scanning piece and transparent plate contact, the adsorption component adsorbs the single page that the scanning piece was glued to the dress, it drives when gluing the scanning piece and keeping away from to put the thing board, the adsorption component is still adsorbing the single page of scanning piece, bulldoze the subassembly this moment and promote the single page of scanning piece with the single page to keeping away from one side that bulldozes the subassembly, thereby realize scanning piece automatic page turning, when using the page turning device to turn over the page or leaf the scanning piece of gluing automatically, scanning speed has been improved, staff's work load has been reduced simultaneously.

Preferably, adsorption component includes aspiration pump, hose and adsorption tube, and aspiration pump and adsorption tube fixed connection are at the roof lower surface, hose intercommunication aspiration pump and adsorption tube, and the one end of adsorption tube runs through the transparent plate and with transparent plate lower surface parallel and level, when the mucilage binding scanning piece was supported with the transparent plate, the blank edge support of adsorption tube and mucilage binding scanning piece.

Through adopting above-mentioned technical scheme, when using adsorption component to adsorb the single page of mucilage binding scanning piece, start the aspiration pump, the one end that the hose was kept away from through the adsorption tube of aspiration pump is admitted air, when the mucilage binding scanning piece was with the transparent plate butt, the one end and the mucilage binding scanning piece butt of adsorption tube, the aspiration pump was in the state of bleeding this moment always, thereby make and be in the negative pressure state in the adsorption tube, the single page and the transparent plate that will glue the dress scanning piece are connected temporarily, thereby realize the separation of mucilage binding scanning piece single page and mucilage binding scanning piece body.

Preferably, bulldoze the subassembly and include the power pole, the connecting rod, the push rod, spacing pipe, deflector and slide bar, deflector fixed connection is at the roof lower surface, and the deflector is perpendicular parallel with the connecting plate with the roof, the guide way has been seted up to the deflector lateral wall, power pole one end is articulated with putting thing board lateral wall, remaining one end is articulated with the connecting rod, the one end that the power pole was kept away from to the connecting rod is articulated with the push rod, the push rod is pegged graft in spacing intraductal, spacing pipe and installing frame fixed connection, and the length direction's of spacing pipe central line is parallel with the transparent plate, slide bar fixed connection is in the articulated department of power pole and connecting rod, and the one end that the power pole was kept away from to the slide bar slides in the guide way, the direction.

Through adopting above-mentioned technical scheme, when the adsorption component will glue the single page of dress scanning piece and glue when dress scanning piece separation, put the thing board and remove to the one side of keeping away from the transparent plate, it drives the power pole and remove to the one side that is close to the bottom plate when putting the thing board removal, the slide bar slides along the direction of seting up of guide way in the guide way this moment, under the restriction of spacing pipe, the angle between connecting rod and the power pole changes, the push rod is to the one side removal of keeping away from the guide plate simultaneously, thereby realize promoting the single page that is inhaled by adsorption component, realize turning over the page, when putting the in-process that the thing board rises, the push rod is to the one side shrink of being close to the guide plate, thereby accomplish whole page turning process, it helps improving staff's scanning work efficiency who glues dress scanning piece.

Preferably, the guide groove is gradually inclined from the bottom end to the top end towards one side far away from the limiting pipe.

Through adopting above-mentioned technical scheme, when the slide bar slided in the guide way, the guide way helped reducing the friction between slide bar and the deflector to keeping away from spacing pipe's one side slope, helped reducing the connecting rod simultaneously and drive the push rod when removing and spacing between the pipe friction to reached and improved the effect of turning over page device stability in use and smoothness nature.

Preferably, the bearing is sleeved on the circumferential outer wall of the sliding rod and is positioned in the guide groove, and the bearing slides in the guide groove along the opening direction of the guide groove.

Through adopting above-mentioned technical scheme, when the slide bar slided in the guide way, the friction of slide bar and guide way inner wall can be reduced in the setting of bearing to the smoothness nature of page turning device use has been improved.

Preferably, one end of the push rod, which is far away from the connecting rod, is vertically and fixedly connected with a page turning rod, the page turning rod is a round rod, and the page turning rod is perpendicular to the connecting plate.

By adopting the technical scheme, the contact area between the page turning device and a single page of the glued scanning piece is increased due to the arrangement of the page turning rod, and when the page turning device is used for turning pages, the integrity and the safety of the glued scanning piece are improved due to the arrangement of the page turning rod.

Preferably, the one end fixedly connected with of adsorption tube near the transparent plate is ventilative adsorption plate, and ventilative adsorption plate is porous platelike structure, and ventilative adsorption plate inlays to establish and level with the transparent plate lower surface in the transparent plate.

Through adopting above-mentioned technical scheme, setting up of ventilative adsorption plate has increased the area of contact between mucilage binding scanning piece and the adsorption tube, guarantees the completion security of scanning a single page at absorbent in-process.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the object placing plate, the hydraulic cylinder, the limiting groove and the transparent plate are matched for use, so that the effect of flattening the scanned surface of the glued scanning piece can be realized, and the accuracy of information scanning of the glued scanning piece is improved;

2. the arrangement of the adsorption component and the pushing component can realize the effect of automatically turning pages of the glued scanning piece in the scanning process, thereby achieving the effects of reducing the workload of workers and improving the scanning speed;

3. the page turning rod and the breathable adsorption plate are arranged, so that the safety and stability effects of the glued scanning piece in the page turning process of the glued scanning piece are improved.

Drawings

Fig. 1 is an overall structural view of the related art;

FIG. 2 is a partial schematic part view showing the clamping assembly;

FIG. 3 is a partial schematic part view showing the biasing assembly;

fig. 4 is a schematic view of a part of a bearing.

Description of reference numerals: 1. a fixing frame; 11. a top plate; 12. a base plate; 13. a connecting plate; 2. a light-sensitive receiver; 3. a storage plate; 31. accommodating grooves; 4. a hydraulic cylinder; 5. a transparent plate; 6. a clamping assembly; 61. a splint; 62. a cylinder; 7. an adsorption component; 71. an air pump; 72. a hose; 73. an adsorption tube; 731. a gas permeable adsorption plate; 8. a pushing assembly; 81. a power rod; 82. a connecting rod; 83. a push rod; 84. a limiting pipe; 85. a guide plate; 851. a guide groove; 86. a slide bar; 861. a bearing; 9. page turning rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a digital scanner.

Referring to fig. 1, the digital scanner comprises a fixed frame 1, the fixed frame 1 comprises a top plate 11, a bottom plate 12 and a connecting plate 13, the connecting plate 13 is vertically arranged, the top plate 11 is vertically and fixedly connected to the top end of the side wall of the connecting plate 13, the bottom plate 12 is vertically and fixedly connected to the bottom end of the side wall of the connecting plate 13, the top plate 11 and the bottom plate 12 are positioned at the same side of the connecting plate 13, the top plate 11 is parallel to the bottom plate 12, the lower surface of the top plate 11 is fixedly connected with a light-sensitive receiver 2 for scanning information on an adhesive scanning piece, the upper surface of the bottom plate 12 is provided with an object placing plate 3 for placing the scanning piece, a hydraulic cylinder 4 for driving the object placing plate 3 to lift is arranged between the object placing plate 3 and the bottom plate 12, a transparent plate 5 is arranged between the object placing plate 3 and, sweep the piece with the mucilage binding and place putting 3 upper surfaces of thing board, start hydraulic cylinder 4 this moment, pneumatic cylinder 4 drives and puts thing board 3 and rise to drive mucilage binding scanning piece and 5 butts of transparent plate, thereby realize with the clamp joint of mucilage binding scanning piece at transparent plate 5 with put between thing board 3, thereby flatten the arc scanning face of mucilage binding scanning piece, thereby realize improving the effect of scanning information's accuracy.

Referring to fig. 1 and 2, the upper surface of the object placing plate 3 is provided with an accommodating groove 31 for placing the glue binding part of the glue binding scanning piece, the length direction central line of the accommodating groove 31 is perpendicular to the connecting plate 13, the accommodating groove 31 is internally provided with a clamping assembly 6, the clamping assembly 6 comprises an air cylinder 62 and two clamping plates 61, the two clamping plates 61 are arranged in the accommodating groove 31, the length direction of the clamping plates 61 is the same as the arranging direction of the accommodating groove 31, the upper surface of the clamping plates 61 is flush with the upper surface of the object placing plate 3, the air cylinder 62 is fixedly connected with the side walls of the clamping plates 61 which are away from each other, when the glue binding scanning piece is placed in the accommodating groove 31, the glue binding part of the glue binding scanning piece is ensured to be positioned between the two clamping plates 61, the air cylinder 62 is started, the air cylinder 62 drives the clamping plates 61 to approach each other to realize the effect of clamping the glue binding scanning piece, when the object, holding tank 31 set up can hide the mucilage binding part of mucilage binding scanning piece, when putting thing board 3 and drive the mucilage binding scanning piece rebound, holding tank 31 set up the area of contact that has increased mucilage binding scanning piece and transparent plate 5 to scanning information's accuracy has been increased, clamping component 6 set up the improvement mucilage binding scanning piece and put the stability of being connected between the thing board 3, and then has improved scanning information's accuracy.

Referring to fig. 1 and 3, a page turning device for turning a single page of the glued scanning piece is arranged in the fixing frame 1, the page turning device comprises an adsorption component 7 for separating the single page of the glued scanning piece from the glued scanning piece and a pushing component 8 for turning the single page of the glued scanning piece, and the page turning device is arranged to improve the working efficiency of the digital scanner and reduce the workload of workers.

Referring to fig. 2, the absorption assembly 7 includes an air pump 71, a hose 72 and an absorption tube 73, the air pump 71 is fixedly connected to the fixed frame 1, the hose 72 is connected to the air pump 71 and the absorption tube 73, one end of the absorption tube 73 is fixedly connected to the top plate 11, the remaining end of the absorption tube 73 penetrates through the transparent plate 5, and the end of the absorption tube 73 away from the top plate 11 is flush with the lower surface of the transparent plate 5, the end of the absorption tube 73 away from the top plate 11 is fixedly connected to a gas-permeable absorption plate 731, the gas-permeable absorption plate 731 is embedded in the transparent plate 5, and the lower surface of the gas-permeable absorption plate 731 is flush with the lower surface of the transparent plate 5, the gas-permeable absorption plate 731 is a porous plate structure, when the placement plate 3 drives the glued scanning piece to abut against the transparent plate 5, the gas-permeable absorption plate 731 abuts against the edge of the single page of the scanning piece, therefore, the single page of the glued scanning piece is separated from the glued scanning piece, and the arrangement of the air-permeable adsorption plate 731 improves the completion safety of the scanning piece.

Referring to fig. 3, the pushing and pressing assembly 8 includes a power rod 81, a connecting rod 82, a pushing rod 83, a limiting tube 84, a guiding plate 85 and a sliding rod 86, the guiding plate 85 is vertically and fixedly connected to the lower surface of the top plate 11, the guiding plate 85 is parallel to the connecting plate 13, a guiding groove 851 is formed in the side wall of the guiding plate 85, the guiding groove 851 gradually moves from the bottom end to the top end to the side far from the limiting tube 84, the bottom end of the guiding groove 851 is as high as the limiting tube 84, one end of the power rod 81 is hinged to the object placing plate 3, the end of the power rod 81 far from the object placing plate 3 is hinged to the connecting rod 82, the end of the connecting rod 82 far from the power rod 81 is hinged to the pushing rod 83, the limiting tube 84 is fixedly connected to the fixing frame 1, the length direction center line of the limiting tube 84 is parallel to the top plate 11 and the limiting plate, the pushing, the sliding rod 86 is fixedly connected at the hinged position of the power rod 81 and the push rod 83 and is positioned at one side close to the guide plate 85, one end of the sliding rod 86, which is far away from the power rod 81, is inserted in the guide groove 851, and the sliding rod 86 can only slide along the opening direction of the guide groove 851, when the object placing plate 3 drives the adhesive scanning piece to abut against the transparent plate 5, the single page of the adhesive scanning piece is adsorbed by the adsorption component 7, at the moment, along with the downward movement of the object placing plate 3, the power rod 81 drives the sliding rod 86 to slide along the opening direction of the guide groove 851, at the moment, the angle between the connecting rod 82 and the power rod 81 is changed, because the length of the connecting rod 82 is unchanged, under the limitation of the limiting pipe 84, the push rod 83 moves towards one side far away from the guide plate 85, so that the single page of the adhesive scanning piece is pushed towards one side far away from the guide plate 85, the page turning process is, thereby completing the entire page turning process. The arrangement of the page turning device reduces the workload of workers and improves the scanning efficiency.

Referring to fig. 4, the bearing 861 is sleeved on the outer circumferential wall of the slide bar 86, the bearing 861 is embedded in the guide groove 851 and slides along the length direction of the guide groove 851, and the arrangement of the bearing 861 can reduce friction between the slide bar 86 and the inner wall of the guide groove 851, thereby improving the smoothness of use of the page turning device.

Referring to fig. 3, one end of the push rod 83, which is far away from the connecting rod 82, is fixedly connected with the page turning rod 9, the page turning rod 9 is a round rod, the center line of the round rod in the length direction is perpendicular to the connecting plate 13 and is parallel to the top plate 11, and the arrangement of the page turning rod 9 can increase the contact area between the push rod 83 and the glued scanning piece in the page turning process, so that the completeness and completeness of the glued scanning piece are ensured.

The implementation principle of the digital scanner in the embodiment of the application is as follows: when in use, the cementing part of the cementing scanning piece is placed in the accommodating groove 31, and the cementing part is ensured to be positioned between the clamping plates 61, at the moment, the cylinder 62 is started to clamp the cementing part of the cementing scanning piece, at the moment, the hydraulic cylinder 4 is started, the hydraulic cylinder 4 drives the cementing scanning piece to move towards one side close to the transparent plate 5, under the extrusion of the object placing plate 3 and the transparent plate 5, the arc-shaped surface of the glued scanning piece is abutted against the transparent plate 5, thereby improving the accuracy of the scanning information, when the scanning is finished, the object placing plate 3 moves to one side close to the bottom plate 12, the adsorption component 7 adsorbs the single page of the glued scanning piece, the pushing component 8 drives the page turning rod 9 to turn the page of the single page, the hydraulic cylinder 4 rises the page turning rod 9 again to reset, therefore, the whole scanning process is completed, and the effects of reducing the workload of workers, improving the scanning efficiency and improving the accuracy of scanning information are achieved.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A digital scanner, comprising: comprises a fixed frame (1), the fixed frame (1) comprises a top plate (11), a bottom plate (12) and a connecting plate (13), the connecting plate (13) is vertically arranged, the top plate (11) is vertically and fixedly connected with the top end of the side wall of the connecting plate (13), the bottom plate (12) is vertically and fixedly connected with the bottom end of the side wall of the connecting plate (13), and bottom plate (12) and roof (11) are located the same lateral wall of connecting plate (13), roof (11) lower fixed surface is connected with light sense receiver (2) that are used for the scanning data, bottom plate (12) upper surface is provided with puts thing board (3) that are used for placing mucilage binding scanning piece, it is provided with pneumatic cylinder (4) that are used for driving to put thing board (3) lift to put to be provided with between thing board (3) and bottom plate (12), it is provided with transparent plate (5) to put between thing board (3) and light sense receiver (2), transparent plate (5) and connecting plate (13) fixed connection.

2. A digital scanner as defined in claim 1, wherein: put thing board (3) upper surface and seted up holding tank (31) that are used for placing mucilage binding scanning piece mucilage binding part, the orientation of seting up of holding tank (31) is perpendicular with connecting plate (13), is provided with in holding tank (31) and is used for pressing from both sides centre gripping subassembly (6) of tight mucilage binding scanning piece.

3. A digital scanner as defined in claim 2, wherein: centre gripping subassembly (6) are including splint (61) and cylinder (62), splint (61) are provided with two, and splint (61) are pegged graft in holding tank (31), and the length direction of splint (61) is the same with the length direction of guide way (851), and splint (61) upper surface flushes with putting thing board (3) upper surface, and cylinder (62) are located one side that splint (61) deviate from each other, and cylinder (62) are used for adjusting the mutual distance between two splint (61).

4. A digital scanner as defined in claim 1, wherein: the page turning device is arranged in the fixing frame (1) and used for turning pages of the glued scanning piece, and comprises an adsorption component (7) used for separating a single page of the glued scanning piece from the glued scanning piece and a pushing and pressing component (8) used for turning the single page.

5. A digital scanner as defined in claim 4, wherein: adsorption component (7) are including aspiration pump (71), hose (72) and adsorption tube (73), and aspiration pump (71) and adsorption tube (73) fixed connection are at roof (11) lower surface, and hose (72) intercommunication aspiration pump (71) and adsorption tube (73), and the one end of adsorption tube (73) runs through transparent plate (5) and with transparent plate (5) lower surface parallel and level, when mucilage binding scanning piece and transparent plate (5) butt, adsorption tube (73) and the blank edge butt of mucilage binding scanning piece.

6. A digital scanner as defined in claim 4, wherein: the pushing and pressing assembly (8) comprises a power rod (81), a connecting rod (82), a push rod (83), a limiting pipe (84), a guide plate (85) and a slide rod (86), the guide plate (85) is fixedly connected to the lower surface of the top plate (11), the guide plate (85) is perpendicular to the top plate (11) and parallel to the connecting plate (13), a guide groove (851) is formed in the side wall of the guide plate (85), one end of the power rod (81) is hinged to the side wall of the object placing plate (3), the other end of the power rod is hinged to the connecting rod (82), one end, far away from the power rod (81), of the connecting rod (82) is hinged to the push rod (83), the push rod (83) is inserted into the limiting pipe (84), the limiting pipe (84) is fixedly connected with the fixed frame (1), the central line of the length direction of the limiting pipe (84) is parallel to the transparent plate (5), the slide rod (86) is, and one end of the sliding rod (86) far away from the power rod (81) slides in the guide groove (851), the sliding direction is the opening direction of the guide groove (851), and the bottom end of the guide groove (851) is as high as the limiting pipe (84).

7. A digital scanner as defined in claim 6, wherein: the guide groove (851) gradually inclines to one side far away from the limiting pipe (84) from the bottom end to the top end.

8. A digital scanner as defined in claim 6, wherein: the bearing (861) is sleeved on the circumferential outer wall of the sliding rod (86), the bearing (861) is located in the guide groove (851), and the bearing (861) slides in the guide groove (851) along the opening direction of the guide groove (851).

9. A digital scanner as defined in claim 6, wherein: one end of the push rod (83) far away from the connecting rod (82) is vertically and fixedly connected with a page turning rod (9), the page turning rod (9) is a round rod, and the page turning rod (9) is perpendicular to the connecting plate (13).

10. A digital scanner as defined in claim 5, wherein: one end fixedly connected with ventilative adsorption plate (731) that adsorption tube (73) are close to transparent plate (5), ventilative adsorption plate (731) are porous platelike structure, and ventilative adsorption plate (731) inlay and establish and level with transparent plate (5) lower surface in transparent plate (5).