CN1181719C - Electromagnetic shielding structure for electronic machine - Google Patents
Electromagnetic shielding structure for electronic machine Download PDFInfo
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- CN1181719C CN1181719C CNB021067147A CN02106714A CN1181719C CN 1181719 C CN1181719 C CN 1181719C CN B021067147 A CNB021067147 A CN B021067147A CN 02106714 A CN02106714 A CN 02106714A CN 1181719 C CN1181719 C CN 1181719C
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Abstract
To provide a structure ensuring more reliable electromagnetic shielding while suppressing cost increase. In the electromagnetic wave shielding structure for electronic apparatus where an opening/closing door 31 shields an electromagnetic wave being radiated outward from an electronic apparatus EP disposed in a housing, the door 31 is provided with a door side conduction member covering an opening for the door 31 made in the housing side, and a housing side conduction member approaching the edge part of the door side conduction member under closed state of the door 31 is provided on the housing side. The edge part of the door side conduction member and the housing side conduction member are shaped such that the advancing passage of electromagnetic wave formed between the edge part of the door side conduction member and the housing side conduction member is snaked under closed state of the door 31.
Description
Technical field
The present invention relates to the electromagnetic wave screening structure that a kind of e-machine is used, shielding from e-machine that door to be opened/closed is housed at basket to outside radiated electromagnetic wave.
Background technology
Generally, e-machine makes other machines generation misoperation in order to prevent the electromagnetic wave that this e-machine produces, the measure of having taked inhibition to generate electromagnetic waves.This measure is for example considered to apply electromagnetic shielding on the basket of this e-machine.The structure of this electromagnetic shielding generally takes basket to make with metallic plate, for the removable cover that keeps in repair etc., and the method that its peripheral part is securely connected with screw.
But, above-mentioned structure in the past, under the occasion of the e-machine of a certain degree, bothersome in the operation of dismounting cover, just incompatible at maintenance activity occurrence frequency height.
In this case, be contained in the door on the basket, " bolted " that need not be above-mentioned for maintenance activity, can carry out the structure of electromagnetic shielding again really as easy opening and closing operations, for example, consideration is the method for clogging with the soft seal pad between the door of closed condition and the basket, but this method improves the cost of e-machine.
The present invention has done in view of this truth, and its purpose is: provide a kind of not only controlling cost to improve the structure of more positively implementing electromagnetic shielding simultaneously.
Summary of the invention
1 structure according to the present invention, using the electromagnetic wave screening structure to the electromagnetic e-machine of external radiation in order to shield from the e-machine that has door to be opened/closed at basket, on above-mentioned door, have above-mentioned basket side form in order to cover the reveal conductive component of above-mentioned door with opening, have when above-mentioned door is in closed condition and the approaching basket side conductive component of edge portion of above-mentioned reveal conductive component in above-mentioned basket side, the edge portion of above-mentioned reveal conductive component and above-mentioned basket side conductive component are under above-mentioned door closing state, make the electromagnetic wave that forms between the edge part of above-mentioned reveal conductive component and the above-mentioned basket side conductive component path of advancing form the state that crawls, and above-mentioned reveal conductive component is when shaping with sheet metal, and above-mentioned door has the resinous lid that covers above-mentioned reveal conductive component on the outer surface side of above-mentioned e-machine and constitutes.
Promptly, under the door closing state on the e-machine basket, become the shape of crawling even also can be used as the electromagnetic wave that forms between the edge part of above-mentioned reveal conductive component and the above-mentioned basket side conductive component path of advancing in the gap that has slightly between the edge part of the reveal conductive component that has on the door and the basket side conductive component near this edge part, so the electromagnetic wave that comes out from the e-machine internal radiation reflects repeatedly and absorbs through the path way of advancing is decayed fully.
Therefore, with needing only the simple structure that the parts of parts that have on the door and basket side is formed above-mentioned shape, just can suppress electromagnetic leakage fully, therefore, a kind of raising of promptly can controlling cost can be provided, can more positively carry out the structure of electromagnetic shielding again.
The door of the maintenance maintenance usefulness that possesses on the e-machine is considered from decoration aspect and operability, generally seldom makes complicated shape.
This situation, when for example making the method for door with the metallic plate punch process, the complicated more manufacturing cost of shape is high more, perhaps, when making door, because this spraying cost cost height, still improved the manufacturing cost of e-machine with the method for ester moulding, conductive coating spray.
As mentioned above, the outer surface side of the e-machine that complex-shapedization tendency is strong is made desired shape with the low-cost resin lid of making, and above-mentioned reveal conductive component is used the sheet metal processing and fabricating, in order to positively to carry out electromagnetic shielding as simple shape.
Therefore, even when a kind of complex-shapedization of door exterior surface that is contained on the e-machine is provided, also controllable costs improves, and can more positively carry out the structure of electromagnetic shielding again.
2 structure according to the present invention, above-mentioned door is made the shape of protruding to foreign side's side of above-mentioned e-machine.
Promptly, according to the configuring condition that adapts to each device in the e-machine etc., in the time of need making the shape of the more complicated of outside foreign side's side direction of e-machine, protruding to door, as mentioned above, at the result who increases manufacturing cost with processing method for stamping and conductive coating spray method, resinous lid and the method for combining with the reveal electroconductive component of sheet metal processing system, suppress that cost improves and certain electromagnetic shielding aspect more suitable.
3 structure according to the present invention, above-mentioned door is the structure of shaking open and close type, the edge part of above-mentioned reveal conductive component and above-mentioned basket side conductive part wherein a side conductive component have the tabular part of its surface along the close departure direction configuration of conductive component, the opposing party's conductive component is made under the closed condition of above-mentioned door, seizes the cross section that above-mentioned tabular partly is word shape on both sides by the arms.
Promptly, Yin Men is the relation of shaking the open and close type structure, along with the electromagnetic path shape or the shape of crawling of advancing, combination with parts with simple shape of the parts that are the formation of word shape of seizing this part on both sides by the arms of above-mentioned tabular part, just can positively form electromagnetic shielding, so can further reduce cost.
In addition, 4 structure according to the present invention, an above-mentioned side's conductive component is and butt side in above-mentioned tabular part, the structure that the butt side plate material of the preceding extreme direction configuration of the font part of above-mentioned the opposing party's conductive component is linked to each other below the closed condition of above-mentioned door.
Therefore,, promptly kept the simplification of global shape, can further improve the shielding electromagnetic waves effect again owing to added above-mentioned butt side plate material.
Simultaneously, 5 structure according to the present invention for example for the exposure device of exposure image on sensitive photographic materials such as photographic paper, is suitable for aforesaid right and requires any structure in the middle of 1～4.
In above-mentioned image exposing apparatus, owing to use the relation of sensitive photographic material, need prevent positively that light from entering from the outside of device basket, also expect certainly to block at following light of coming in of above-mentioned door closing state from only gap.
So, as mentioned above, between reveal electroconductive component that has on the door and basket side electroconductive component, the electromagnetic path of advancing is made the shape of crawling, promptly can suppress to go out electromagnetic wave, also can suppress the intrusion of light in basket simultaneously to the external leaks of e-machine.
Description of drawings
Fig. 1 is the image exposing apparatus internal configurations key diagram relevant with embodiments of the invention.
Fig. 2 is the structure chart of relevant with embodiments of the invention door.
Fig. 3 is relevant partial enlarged drawing with embodiments of the invention.
Fig. 4 is the stereoscopic figure of the image exposing apparatus relevant with embodiments of the invention.
Fig. 5 is the structure of program segment figure of the photo enlarging and printing device relevant with embodiments of the invention.
Among the figure: 31-door, 50-reveal conductive component, 52-basket side conductive component, 51-resin cap, 52a-tabular part, 52b-butt side plate material, EP-image exposing apparatus.
Embodiment
Below, with reference to accompanying drawing, the situation when being applicable to the exposure device of e-machine one example is an example, and the embodiment of e-machine of the present invention with electromagnetic wave screening structure is described.
The exposure device EP that exemplifies in the present embodiment is the device that exposes on the photographic paper of one of sensitive photographic material, shown in the structure of program segment figure of Fig. 5, individual negative scanner FS of intact photographic negative 1 (following slightly be called simply " egative film 1 ") combines with reading development treatment, the so-called digital small-sized developing machine of formation, be well-known photographic printing apparatus DP.
The simple structure of negative scanner FS
Negative scanner FS, as Fig. 5 roughly shown in, have: Halogen lamp LED 10, be the light modulation filter 11 of adjustment from the color balance of the light of Halogen lamp LED 10 ejaculations, the mirror tunnels 12 of the light uniform color mixture by light modulation filter 11, what have conveyer 13a and omitted illustrated filter easel mask etc. is positioned egative film 1 the locational egative film screen unit 13 of reading of appointment, the single CCD scanline unit 14 of carrying out opto-electronic conversion of egative film 1, make the camera lens 15 of the imaging on the CCD scanline unit of egative film 1, the reflective mirror 16 that light path is turn 90 degrees, make the treatment circuit 17 of the output signal amplification of CCD scanline unit 14 and A/D conversion etc., output signal according to this treatment circuit 17, be generated as the exposure data of exposure device EP, control the scanner control part 18 of each action in the negative scanner FS simultaneously, simulation that the display simulation finishing prints off copies from a negative and the various control monitor 19 of information, for scanner control part 18 being imported the operating desk 20 of the operations such as manual setting of conditions of exposures.
CCD scanline unit 14 has the CCD scan line transducer that 5000 CCD elements are arranged along the Width of egative film 1 that 3 row are arranged side by side, form colored filter red, green, blue look on the sensitive surface of each CCD scan line transducer respectively, the single image of egative film 1 is carried out color decompose and detect.
Negative scanner FS, after being contained in egative film 1 on the egative film screen unit 13, conveyer 13a just begins transporting of egative film 1, reads single image successively, as the DID of every kind of color of red, green, blue look to 18 outputs of scanner control part.
Obtain in scanner control part 18 calculation,, and it is shown on monitor according to the analog image that when the view data of treatment circuit 17 inputs is made photo, obtains.
Operating personnel observe the analog image on this monitor 19, if do not obtain suitable image is just carried out conditions of exposure by operating desk 20 correction input.
Scanner control part 18 according to proofreading and correct input from the view data of treatment circuit 17 input and this, generates the exposure data by the calculation condition that has preestablished.
In addition, omit detailed description at this, but on negative scanner FS, had the reading device of various mediums such as reading CD and CD-ROM, it can also produce photo according to the view data of storing on these medium except the single image of egative film 1.
The structure of image exposing apparatus
Image exposing apparatus EP outward appearance as shown in Figure 4, it and negative scanner FS singly are integral respectively, are provided with: the image exposure unit 25 of exposure image on photographic paper 2, the photographic paper 2 of the light that exposed to the sun with the image exposure unit is carried out the development treatment portion 26 of development treatment, the printing paper that the photographic paper 2 of drawing from printing paper frame 5 is transported to development treatment portion 26 transports the PT of system, the grader 3 of the photographic paper 2 that has developed in development treatment portion 26 by predtermined category, the conveyer belt 4 that the photographic paper 2 of discharging from development treatment portion 26 is transmitted to grader 3 and the exposure control part 27 of each one of control.
And then, in photographic paper transports the way of the approach that transports of the PT of system, also have: the long photographic paper 2 of drawing from printing paper frame 5 by the cutting knife 28 of setting the picture format cut-out, be listed as the photographic paper 2 that transports and be divided into the sorting unit 29 that transports row cut into one with this cutting knife 28.
Configuration structure in the basket of image exposing apparatus EP
As shown in Figure 1, it is the machines configurations front view of inside at the front side door 30 of the two fan gate-types of dividing right and left of the basket face side that is contained in image exposing apparatus EP from the centre, inboard at front side door 30, the device lower end disposes the printing paper frame storage portion ML for filling printing paper frame 5 of pair of right and left, be equipped with in the space between the printing paper frame storage portion ML of pair of right and left constitute above-mentioned printing paper transport the PT of system a part above-mentioned sorting unit 29 and a plurality of exposures of transporting roller 24a are housed before delivery unit 32, top at the printing paper frame storage portion ML on the right side of seeing from the front is disposing the control box 34 that above-mentioned exposure control part 27 is housed.
The top of delivery unit 32 before exposure has disposed printing paper 2 has been transported to the exposure delivery unit 33 on the exposure location of image exposure unit 25 exposures, has disposed above-mentioned image exposure unit 25 on the top of control box 34.In exposure delivery unit 33, a plurality of roller 24b that transport are housed also.
Top in exposure delivery unit 33 and image exposure unit 25 disposes: the 1st exposure back delivery unit the 45, the 2nd exposure back delivery unit 46 and the 3rd exposure back delivery unit 47 of accepting the printing paper that comes out from the exposure delivery unit 33 of the photographic paper 2 that transports the light that exposed to the sun in image exposure unit 25.On the 1st～the 3rd exposure back delivery unit 45,46,47, also be equipped with same a plurality of of other delivery unit and transport roller 24c, similarly constitute the part that photographic paper transports the PT of system with exposure delivery unit etc.
Basket upper side at image exposing apparatus EP is equipped with the top side door 31 that the 1st～the 3rd exposure back delivery unit 45,46,47 is carried out maintenance activity, and as shown in Figure 4, it shakes switching around horizontal axis.The shape of top side door 31 made and disposed above-mentioned the 1st～the 3rd exposure back delivery unit 45,46,47 around the position top more protruding upward of basket configuration relation is arranged, and the shape of protruding to image exposing apparatus EP foreign side side.
As shown in Figures 1 and 2, the structure of top side door 31 is: on the reveal conductive component 50 of the opening of top side door 31 usefulness that form for the basket side that covers image exposing apparatus EP, fixing the resin cap 51 that covers reveal conductive component 50 on the outer surface of exposure device EP.Because it is the shape of having oversimplified that reveal conductive component 50 is compared with resin cap 51, so shape with the so-called sheet metal of metallic plate (for example iron plate).
The edge part of resin cap 51 shown in amplification side cross-sectional, view Fig. 3 (a) and stereogram Fig. 3 (b) of this part, is bending to step-like bending part 50b with metallic plate in the welding around the vertical walls 50a of flat board.
Corresponding to the structure of above-mentioned top side door 31, the basket side conductive component 52 approaching with the edge part of reveal conductive component 50 is housed under the closed condition of top side door 31 in the basket side of image exposing apparatus EP.
As shown in Figure 2, basket side conductive component 52 is made the whole rectangular framework that is, and is positively fixing with other crown cap of equipping on the basket etc., forms the opening of top side door 31.
As Fig. 3 (a), shown in Fig. 3 (b), the detailed structure of basket side conductive component 52 is the metallic plate on each limit that constitutes rectangular framework, make with stepped being bent to form, and with the mutual welded structure in end of the length direction on these each limits.
Shown in Fig. 3 (a), Fig. 3 (b), the detailed structure of basket side conductive component 52 is: its surface be formed with along reveal conductive component 50 near or leave the tabular part 52a of the direction configuration of basket side conductive component 52, and the shape that links to each other with the butt side plate material 52b of the slightly rectangular intersection of tabular part 52a in the butt side of this tabular part 52a.
Shown in Fig. 3 (a), top side door 31 is closed to the basket with basket side conductive component 52, then the edge part of reveal conductive component 50 forms the cross section by the bottom of vertical walls 50a and bending part 50b and is the word shape, seize above-mentioned tabular part 52a on both sides by the arms, form the position relation of butt side plate material 52b towards the preceding extreme direction configuration of above-mentioned word shape part.
Because the edge part of reveal conductive component 50 and basket side conductive component 52 become above-mentioned position relation, so the edge part of reveal conductive component 50 and basket side conductive component 52 are under top side door 31 closed conditions, the electromagnetic wave that forms between the edge part of reveal conductive component 50 and the basket side conductive component 52 path of advancing has just become the shape of crawling of case of bending.
The mensuration of electromagnetic shielding effect
Below, according to the measurement result of reality, near the electromagnetic shielding effect when making as above-mentioned structure the top side door 31 is described.
Near when making the top side door 31 electromagnetic shielding effect as above-mentioned structure, the Electromagnetic Interference intensity results of using " EN55022 " according to one of EMI standard to measure is as shown in table 1:
Table 1
| Frequency (MHz) | Intensity (QP) dB μ V/m |
| 199.999 | 24.0 |
| 330.944 | 31.2 |
| 400.000 | 37.9 |
| 599.942 | 26.3 |
| 659.936 | 24.1 |
| 799.922 | 31.2 |
| 993.000 | 34.7 |
| 999.900 | 25.9 |
In addition, for the purpose of comparison, according to taking off bending part 50b from reveal conductive component 50, simultaneously with near the lower end of the vertical walls 50a of reveal conductive component 50 and under the situation that is close to the soft seal pad between the tabular part 52a of basket side conductive component 52, the equal conditions when constituting electromagnetic wave screening structure is measured the results are shown in table 2.
Table 2
| Frequency (MHz) | Intensity (QP) (dB μ V/m) |
| 994.932 | 39.7 |
| 199.986 | 25.7 |
| 400.000 | 38.2 |
| 599.942 | 25.7 |
| 991.540 | 33.0 |
| 992.512 | 34.7 |
| 994.528 | 46.9 |
| 995.000 | 43.7 |
The measurement result one of the measurement result of table 1 and table 2 relatively, then relevant with embodiment of the invention electromagnetic wave screening structure demonstrates the good result of the same degree of result of the table 2 of the electromagnetic shielding effect with the certain degree that has when using the soft seal pad.
In addition, the result of table 1 and table 2 comprises that with test the performance of the basket of top side door 31 is the result of main purpose, so not only fully implemented to suppress the measure of electromagnetic wave generation body of the machine of basket inside, further suppressed to leak out electromagnetic intensity because of implementing these measures again from image exposing apparatus EP.In addition, omitted detailed description, also be applicable to and above-mentioned same electromagnetic wave screening structure for the front side door 30 of the basket face side of exposure device EP.
Other embodiment
Below list other embodiments of the invention.
What (1) enumerate in the foregoing description is the image exposing apparatus EP example that the present invention is applicable to e-machine, but goes for for example various e-machines of laser printer etc.
(2) enumerating as electromagnetic wave screening structure applicable object of the present invention in the foregoing description is that the door that shakes open and close type is example, but the switching form of door can be done various changes, for example, only also can be suitable for the present invention hanging up on the hook of basket side on the door of taking the simple structure that opens and closes to door.
(3) configuration mode of the tabular of basket side conductive component 52 partly being seized on both sides by the arms with the font of reveal conductive component 50 part of the electromagnetic wave screening structure in the foregoing description constitutes, but various changes can be arranged to the concrete shape of reveal conductive component 50 and basket side conductive component 52, for example, it is waveform shape that the edge part of reveal conductive component 50 and basket side conductive component 52 usefulness sheet metals are processed into the cross section, under top side door 31 closing state, make both peaks overlap configuration, make the electromagnetic path of advancing become the shape that crawls with peak, Gu Yugu.
(4) electromagnetic wave screening structure in the foregoing description is the configuration mode of the tabular of basket side conductive component 52 partly being seized on both sides by the arms with the font part of reveal conductive component 50, in contrast, also can on reveal conductive component 50, possess the tabular part 52a that is equivalent in the foregoing description, on basket side conductive component 52, possess the part of the font that is equivalent in the foregoing description and constitute.The part that also can on two sides' conductive component, possess in addition, above-mentioned font.
(5) in the foregoing description, top side door 31 is made of reveal conductive component 50 and resin cap 51, but also can process top side door 31 integral body with sheet metal.
Claims (5)
1, the electromagnetic wave screening structure used of a kind of e-machine has the electromagnetic wave of the e-machine of shutter door to external radiation but be used to shield from basket, it is characterized by:
On above-mentioned door, possess reveal conductive component in above-mentioned basket side formation for the opening that covers above-mentioned door usefulness,
Possess the basket side conductive component close under the closed condition of above-mentioned door in above-mentioned basket side with the edge part of above-mentioned reveal conductive component,
The edge part of above-mentioned reveal conductive component and above-mentioned basket side conductive component, under above-mentioned door closing state, the electromagnetic path of advancing that forms between the edge part that makes above-mentioned reveal conductive component and the above-mentioned basket side conductive component is the shape of crawling, and reaches
Above-mentioned reveal conductive component is when shaping with sheet metal, possesses the resin lid that covers above-mentioned reveal conductive component on the outer surface side of above-mentioned e-machine.
2, the electromagnetic wave screening structure used of e-machine according to claim 1 is characterized by: above-mentioned door is to be the shape of protruding to foreign side's side of above-mentioned e-machine.
3, the electromagnetic wave screening structure used of e-machine according to claim 1 and 2 is characterized by:
Above-mentioned door is a rocker switch formula structure,
A wherein side the conductive component of the edge part of above-mentioned reveal conductive component and above-mentioned basket side electric conductor parts, have the surface along the tabular part of close the detaching direction configuration of these conductive components, an other side's conductive component have under the closed condition of above-mentioned door, seize on both sides by the arms the tabular part, the cross section is the shape formation of font.
4, e-machine electromagnetic wave screening structure according to claim 3, it is characterized by: an above-mentioned side's conductive component is in the butt side of above-mentioned tabular part, under the closed condition of above-mentioned door, the butt side plate material that disposes in opposite directions with front end towards the font part of an above-mentioned other side's conductive component fuses.
5, according to any described e-machine electromagnetic wave screening structure in claim 1 or 2, it is characterized by: above-mentioned e-machine is the image exposing apparatus of exposure image on sensitive photographic material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001054061 | 2001-02-28 | ||
| JP2001054061A JP3748045B2 (en) | 2001-02-28 | 2001-02-28 | Electromagnetic wave shielding structure for image exposure apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1384702A CN1384702A (en) | 2002-12-11 |
| CN1181719C true CN1181719C (en) | 2004-12-22 |
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ID=18914447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021067147A Expired - Fee Related CN1181719C (en) | 2001-02-28 | 2002-02-28 | Electromagnetic shielding structure for electronic machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3748045B2 (en) |
| CN (1) | CN1181719C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007098840A (en) * | 2005-10-06 | 2007-04-19 | Kyocera Mita Corp | Imaging device |
| CN106686964A (en) * | 2016-12-31 | 2017-05-17 | 上海小木偶智能科技有限公司 | Viewing window with shielded chamber |
-
2001
- 2001-02-28 JP JP2001054061A patent/JP3748045B2/en not_active Expired - Lifetime
-
2002
- 2002-02-28 CN CNB021067147A patent/CN1181719C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002261485A (en) | 2002-09-13 |
| CN1384702A (en) | 2002-12-11 |
| JP3748045B2 (en) | 2006-02-22 |
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Granted publication date: 20041222 Termination date: 20120228 |