CN209513675U - A kind of darkroom structure and detection device - Google Patents

Abstract

The utility model relates to medical treatment detection device fields, disclose a kind of darkroom structure and detection device, wherein darkroom structure includes darkroom main body, the first opening and the second opening of the inner space for being connected to the darkroom main body are respectively equipped in the main body of darkroom, wherein, first opening can be closed by the first light-shielding structure, the junction of second opening and detection device can be closed by the second light-shielding structure, and after the first opening is closed with above-mentioned junction, the inside of darkroom main body forms dark space, so as to avoid darkroom and other component junction leakage problem, avoid interference of the ambient to measurement, be conducive to promote detection efficiency and accuracy in detection.

Description

A kind of darkroom structure and detection device

Technical field

The utility model relates to medical treatment detection device fields, are specifically related to helicobacter pylori detection device, especially relate to And the darkroom structure in helicobacter pylori detection device.

Background technique

Helicobacter pylori is chronic gastritis and the most important virulence factor of peptic ulcer, and is diagnosed accurately and in time deep and remote Door helicobacter infection is the key that eliminating pylorus (Hp).Through Several Survey Measure exists in the prior art, wherein exhaling Inhaling test is a kind of quick, reliable, safety, the detection mode of no pain, and the principle for breathing test is generated in vivo based on Hp A large amount of urease, if be stranded this to infection Hp patient take orally isotope labelling carbon urea drug (such as urea [¹⁴C]), then it urinates The isotope labelling carbon dioxide that element generates after being decomposed is breathed out from lung.Specimen of breath is collected, detects isotope labelling with instrument The carbon dioxide of the amount of carbon dioxide, positive patient isotope labelling obviously increases, and the sensibility and specificity for detecting Hp is high, Hp then breathes out reduction or disappearance after removing.

The breath test of clinical use is divided into the flash detection Hp of liquid and ionization type detection two kinds of forms of Hp again at present, wherein liquid The principle of flash detection Hp is that sample to be tested is dispersed among liquid scintillator, and the energy for the beta particle that sample is emitted is molten Agent absorbs and solvent molecule is caused to ionize and excite, and the solvent molecule of part excitation transfers energy to the scintillator molecules of surrounding It is set to launch photon, photon forms pulse after amplification is caught in photomultiplier tube acquisition, and then realizes subsequent detection and analysis.Secretly The step of photomultiplier tube acquisition photon of room, must complete in darkroom, in the prior art the company between darkroom and other component Binding structure existing defects cause to influence the measurement of detection device the phenomenon that there are light leakages for darkroom and the junction of other component Precision.

Utility model content

For overcome the deficiencies in the prior art, the utility model provides a kind of darkroom structure, for solving in the prior art There is light leakage phenomena in darkroom and the junction of other component.

The utility model also provides a kind of detection device using darkroom structure.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of darkroom structure, including darkroom main body are respectively equipped with the inner space for being connected to the darkroom main body in the main body of darkroom First opening with second opening, wherein first opening can be closed by the first light-shielding structure, second opening for connecting The junction of detection device, the second opening and detection device is closed by the second light-shielding structure, and when the first opening and even After the place of connecing is closed, the inside of darkroom main body forms dark space.

Mode as a further improvement of the foregoing solution, the first light-shielding structure can be closed with respect to darkroom bulk motion or Open the first opening.

Mode as a further improvement of the foregoing solution, further includes sample bearing device, and sample bearing device includes carrying Platform and the first light-shielding structure for being fixed on carrying platform end, after carrying platform is by the first opening insertion set depth, First light-shielding structure is bonded with the end wall of the darkroom main body where the first opening to close the first opening.

Mode as a further improvement of the foregoing solution, the second light-shielding structure include the first shading pipe, the first shading Guan Lian It is connected to the second opening, detection device is plugged in the first shading pipe.

Mode as a further improvement of the foregoing solution, the second light-shielding structure further include barn door, and the first shading pipe hides certainly It is stretched out on tabula rasa, barn door is equipped with the via hole of the first shading pipe of connection, wherein the darkroom master where barn door and the second opening The side wall of body is bonded, and the first shading pipe passes through via hole and the second open communication.

Mode as a further improvement of the foregoing solution, the second light-shielding structure further include that opposite first shading pipe setting is hiding Second shading pipe of the opposite side of tabula rasa, the second shading pipe are connected to the first shading pipe, and the first shading pipe stretches out outside the main body of darkroom, the Two shading pipes protrude into the main body of darkroom.

Mode as a further improvement of the foregoing solution, the first shading pipe are integrally connected to the second opening.

Mode as a further improvement of the foregoing solution, the second light-shielding structure include the shading being connected in detection device Plate, barn door are bonded with the side wall of the darkroom main body where the second opening.

Mode as a further improvement of the foregoing solution is additionally provided with the assist openings of connection inner space in the main body of darkroom, The outer side covering of assist openings has the hood connecting with darkroom main body.

A kind of detection device, including casing further include connector and above-mentioned darkroom structure, and corresponding first opening is set on casing It is equipped with third opening, connector is connect with darkroom main body, casing respectively, and is opened in connector equipped with the first opening of connection, third The channel of mouth, third opening can be closed by third light-shielding structure.

The beneficial effects of the utility model are:

Be provided with the first opening and the second opening in the darkroom main body of the utility model, the first opening for sample into Out, the second opening is used for the connection in darkroom and detection device, wherein the first opening can be closed by the first light-shielding structure, the The junction of two openings and detection device can be closed by the second light-shielding structure, when the first opening and above-mentioned junction quilt Dark space can be formed in the inside of darkroom main body after closing, so as to avoid the junction in darkroom and other component Leakage problem avoids ambient to the interference of measurement, is conducive to the accuracy rate for promoting detection.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the stereoscopic schematic diagram of darkroom structure one embodiment；

Fig. 2 is the decomposition diagram of darkroom structure one embodiment；

Fig. 3 is the decomposition diagram of second light-shielding structure one embodiment；

Fig. 4 is the decomposition diagram of the 4th embodiment of the second light-shielding structure；

Fig. 5 is the stereoscopic schematic diagram of the 5th embodiment of the second light-shielding structure；

Fig. 6 is the decomposition diagram of the 5th embodiment of the second light-shielding structure；

Fig. 7 is the decomposition diagram of the 6th embodiment of the second light-shielding structure；

Fig. 8 is the stereoscopic schematic diagram of second embodiment of darkroom structure；

Fig. 9 is the decomposition diagram of second embodiment of darkroom structure；

Figure 10 is the stereoscopic schematic diagram of detection device；

Figure 11 is the decomposition diagram of detection device.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation Clear, complete description, to be completely understood by the purpose of this utility model, scheme and effect.It should be noted that not conflicting In the case where, the features in the embodiments and the embodiments of the present application can be combined with each other.

It should be noted that unless otherwise specified, when a certain feature referred to as " fixation ", " connection " are in another feature, It can directly fix, be connected to another feature, and can also fix, be connected to another feature indirectly.In addition, this The descriptions such as up, down, left, right, before and after used in utility model are only relative to each composition portion of the utility model in attached drawing For the mutual alignment relation divided.

In addition, unless otherwise defined, the technology of all technical and scientific terms used herein and the art The normally understood meaning of personnel is identical.Term used in the description is intended merely to description specific embodiment herein, without It is to limit the utility model.Term " and or " used herein includes appointing for one or more relevant listed items The combination of meaning.

Referring to Fig.1, Fig. 2 respectively illustrates the stereoscopic schematic diagram of the utility model darkroom structure one embodiment and divides Solve schematic diagram.As shown, darkroom structure includes darkroom main body 1, darkroom main body 1 is preferably the box body structure of rectangle, inside With the space for storing samples.The first opening 101 that the connection inner space is respectively equipped in darkroom main body 1 is opened with second Mouth 102 is used for the disengaging of sample to be tested wherein the first opening 101 is set to the front bulkhead of darkroom main body 1, and the second opening 102 is set In the upper side wall of darkroom main body 1, for connecting with equipment such as detection device such as photomultiplier tubes, photon in darkroom is adopted in realization Collection.

First opening 101 can be closed by the first light-shielding structure 2, between the second opening 102 and above-mentioned detection device Junction can be closed by the second light-shielding structure 3, can be after the first opening 101 is closed with above-mentioned junction The inside of darkroom main body forms dark space, avoids ambient to the interference of measurement, is conducive to the accuracy for promoting detection, very To the efficiency for promoting detection.The first opening for sample disengaging is provided in the darkroom main body of the utility model, and setting supplies Detection device acquires the second opening of photon in darkroom, and darkroom can shape after the first opening, above-mentioned junction are closed At dark space, hardware support is provided for the application of the detection technique based on X-ray excited polycrystalline structure scintillator, is conducive to X-ray excited polycrystalline structure scintillator and pushes away Extensively, it has the advantages of simple structure and easy realization.

In order to achieve the purpose that detection, darkroom main body 1 must not have other other than the first opening 101 and the second opening 102 Leakage of light point, be based on this, darkroom main body 1 can be made or darkroom main body 1 can also using integral forming process such as castings To be spliced by muti-piece side wall, preferably there is the position being bonded to each other, which passes through welding between side wall Mode fix, guarantee that there is no leakage of light points for the junction of adjacent wall.

First opening 101 can be closed by the first light-shielding structure 2.In the present embodiment, it is additionally provided with for carrying The sample bearing device 4 of sample to be measured.Sample bearing device 4 includes the carrying platform 41 of carrying sample, and is fixed on and holds First light-shielding structure 2 of 41 end of carrying platform, the first light-shielding structure 2 is specially a cover board in the present embodiment.When carrying platform 41 After 101 insertion set depth of the first opening, the first light-shielding structure 2 is bonded to close first and open with the end wall of darkroom main body 1 Mouth 101.The sealing ring around the first opening 101 is additionally provided between first light-shielding structure 2 and the end wall of darkroom main body 1.

In the other embodiments of the utility model, the first light-shielding structure 2 also be may be mounted in darkroom main body 1, be passed through The first opening 101 is closed/opened to the mode of rotation or translation, and in this embodiment, the first light-shielding structure 2 is carried in sample and filled Set 4 openings of inner space rear enclosed first 101 for being included in darkroom main body 1 completely.

Closing for junction between the second opening 102 and detection device, the utility model provide two kinds of thinkings:

One, the second light-shielding structure includes the first shading pipe, which is attached with darkroom main body first, is guaranteed The junction of first shading pipe and darkroom main body does not have leakage of light, the end of probe that then will have detection window in detection device It is inserted into the first shading pipe, lighttight channel is established by the tube wall of the first shading pipe, guarantee that the first shading pipe and detection fill The junction set does not have leakage of light.

First shading pipe can be the component independently of darkroom main body, is connect, can also be led to darkroom by other component Integrally connected technique is crossed to be directly fixed on the main body of darkroom.Other component herein can be barn door, the first shading pipe from It is stretched out on barn door, barn door is then bonded installation with the side wall of darkroom main body.Integrally connected technique herein can be injection molding, casting Equal integral forming process are made, the techniques such as welding, bonding are also possible to.

The second, the second light-shielding structure includes detection device and shading is connected to the barn door in detection device, barn door with The side wall of darkroom main body is bonded, and shading connection herein can use above-mentioned integrally connected technique.

It is described in detail below in conjunction with specific embodiment.

Embodiment one

Referring to Fig. 3, the decomposition diagram of the utility model the second light-shielding structure one embodiment is shown.As schemed Show, the second light-shielding structure includes the first shading pipe 32.

First shading pipe 32 is fixed on the top sidewall of darkroom main body 1 by integrally connected technique, the first shading pipe 32 with Top sidewall vertically connects, and stretches out towards the outside of darkroom main body 1, and the first shading pipe 32 passes through the second opening 102 and darkroom master The inner space of body 1 is connected to.

End of probe in detection device 31 with detection window is inserted into the first shading pipe 32, so that detection window direction The inner space of darkroom main body.Unshowned sealing is provided between the outer wall of detection device 31 and the inner wall of the first shading pipe 32 Circle is sealed.

Embodiment two

The difference of the present embodiment and first embodiment is that the first shading pipe 32 stretches to darkroom body interior, the first shading Pipe 32 is in communication with the outside by the second opening 102, and the other structures of the present embodiment are identical with the first embodiment, and are not done herein superfluous It states.

Embodiment three

It includes outer on the outside of stretching darkroom main body that the difference of the present embodiment and first embodiment, which is the first shading pipe 32 both, Pipe, further includes the inner tube for protruding into darkroom body interior, to further increase the length of impermeable optical channel.

Example IV

Referring to Fig. 4, the decomposition diagram of the 4th embodiment of the second light-shielding structure of the utility model is shown.As schemed Show, the difference of the present embodiment and first embodiment is that the second light-shielding structure 3 further includes barn door 33, the first shading pipe 32 and screening Tabula rasa 33 vertically connects, and barn door 33 is equipped with the via hole of the first shading pipe 32 of connection, and specifically, barn door 33 is to be fixed on The annular slab of first shading pipe, 32 end is provided with several mounting holes on barn door 33.

Barn door 33 is bonded with the top sidewall of darkroom main body 1, and carries out locking, detection device by fasteners such as screws End of probe on 31 with detection window is inserted into the first shading pipe 32, so that detection window is empty towards the inside of darkroom main body Between.Between the outer wall of detection device 31 and the inner wall of the first shading pipe 32 and the top sidewall of barn door 33 and darkroom main body 1 Between may be provided with unshowned sealing ring and be sealed.

Barn door 33 is bonded with the outer surface of top sidewall in the present embodiment, and the first shading pipe 32 is outer towards darkroom main body 1 Portion is stretched out, and in the other embodiments of the utility model, the mount scheme of the second light-shielding structure 3 also has other deformations, comprising: Barn door 33 is bonded with the outer surface of top sidewall, and the first shading pipe 32 is stretched out towards the inside of darkroom main body 1；Or barn door 33 It is bonded with the inner surface of top sidewall, the first shading pipe 32 is stretched out towards the external of darkroom main body 1；Or barn door 33 and top side The inner surface of wall is bonded, and the first shading pipe 32 is stretched out towards the inside of darkroom main body 1.

Using independently of the first shading pipe 32 and barn door 33 except darkroom main body 1 and detection device 31 in the present embodiment It is attached, by the first shading pipe 32 and barn door 33 of replacement different structure and size, different darkroom masters can be adapted to Body 1 and detection device 31.

Embodiment five

Referring to Fig. 5, Fig. 6, the stereoscopic schematic diagram of the 5th embodiment of the second light-shielding structure of the utility model is respectively illustrated With decomposition diagram.As shown, the difference of the present embodiment and fourth embodiment is that the second light-shielding structure 3 further includes the second screening Light pipe 34, the first shading pipe 32, the second shading pipe 34 are located at the opposite side of barn door 33, and vertical with barn door 33 respectively Connection, barn door 33 are equipped with the via hole of the first shading pipe 32 of connection, the second shading pipe 34, and specifically, barn door 33 is to fix Annular slab in the first shading pipe 32,34 junction of the second shading pipe is provided with several mounting holes on barn door 33.

Barn door 33 is bonded with the top sidewall of darkroom main body 1, and carries out locking, the first shading by fasteners such as screws Pipe 32 stretches out outside the main body of darkroom, and the second shading pipe 34 protrudes into darkroom main body 1.With the detection of detection window in detection device 31 End is inserted into the second shading pipe 34 by the first shading pipe 32, so that detection window is towards the inside of the second shading of darkroom pipe 33 Space.Between the outer wall of detection device 31 and the inner wall of the first shading pipe 32 and the outer wall of detection device 31 and the second shading It may be provided with unshowned sealing ring between the inner wall of pipe 34 to be sealed.

Barn door 33 is bonded with the outer surface of top sidewall in the present embodiment, in the other embodiments of the utility model, Barn door 33 can also be bonded with the inner surface of top sidewall.

Embodiment six

Referring to Fig. 7, the decomposition diagram of the 6th embodiment of the second light-shielding structure of the utility model is shown.As schemed Show, the second light-shielding structure includes the barn door 33 that shading is connected to 31 outside of detection device, and barn door 33 is equipped with several peaces Fill hole.Barn door 33 is bonded with the top sidewall of darkroom main body 1, and carries out locking by fasteners such as screws.Barn door 33 with It may be provided with unshowned sealing ring between the top sidewall of darkroom main body 1 to be sealed.Shading connection herein can use Integrally connected mode.

In addition to the first above-mentioned opening 101 and the second opening 102, assist openings can also be set in darkroom main body 1, it is auxiliary Help opening for realizing the connection in darkroom and external function device, function device includes but is not limited to driving device, barcode scanning dress It sets, position sensor etc., wherein driving device is used to that above-mentioned sample bearing device 4 to be driven to pass in and out darkroom main body 1, barcode scanning device For scanning the information on sample bearing device 4, position sensor is used for the position of test sample bogey 4.Reference Fig. 8, Fig. 9 respectively illustrates the stereoscopic schematic diagram and decomposition diagram of second embodiment of the utility model darkroom structure.As schemed Show, the lower wall of darkroom main body 1 is equipped with several assist openings 103, and the outer side covering of 103 region of assist openings has screening Light shield 5, hood 5 modes such as are connected by screw to and are fixed in the lower wall of darkroom main body 1, the lower wall with darkroom main body 1 It is common to surround the shed space formed for installing driving device and/or barcode scanning device, avoid ambient from assist openings 103 Into darkroom.

The invention also discloses a kind of detection devices.0, Figure 11 referring to Fig.1 respectively illustrate the utility model detection The stereoscopic schematic diagram and decomposition diagram of equipment.As shown, detection device includes that casing 6, connector 7 and above-mentioned darkroom are tied Structure, casing 6 can be the outermost shell of detection device, can also be different from the shell for being exclusively used in installation darkroom of apparatus casing Body illustrates only casing 6 in Figure 10, Figure 11 towards the part of the first opening 101, and other parts are hidden, darkroom structure It is mounted on the inside of casing 6.

Third opening 61 is provided on the side wall that casing 6 is open 101 towards first.Connector 7 be set to darkroom main body 1 with It is preferably tubular structure between casing 6, thereon includes through the channel of entire connector 7, the both ends of connector 7 are set respectively It is equipped with the entrance for being connected to the channel.In use, the both ends of connector 7 are tightly connected with darkroom main body 1, casing 6 respectively, so that even The first opening 101 of opening covering and the third opening 61 at 7 both ends of fitting, thus between the first opening 101 and third opening 61 Form lightproof area.

Specifically, connector 7 includes docking section 71 and covering portion 72, and docking section 71 and covering portion 72 are run through in above-mentioned channel, And above-mentioned entrance is respectively equipped in docking section 71 and covering portion 72.The end face of docking section 71 is bonded fixation with casing 6, and joint place is set There is sealing ring, realizes the impermeable light connects of connector 7 and casing 6；Covering portion 72 is then coated on darkroom main body 1 with the first opening The impermeable light connects of connector 7 and darkroom main body 1 are realized in the outside of 101 end.

Third opening 61 can be closed by third light-shielding structure 8, since the first opening 101 is darkroom main body 1 and the external world The channel for carrying out sample exchange, needs frequently to open and close, therefore is easy to happen leakage of light, this reality at the first opening 101 Lightproof area is additionally constructed in the outside of the first opening 101 by connector with novel, when third opening 61 is hidden by third Photo structure 8 can be significantly reduced the extraneous light reached at the first opening 101 when closing, pass through the first shading knot again at this time First opening 101 of the closing of structure 2 can be further reduced the light leaked to inside darkroom main body 1, and then guarantee the essence of measurement Degree.

In the present embodiment, third light-shielding structure 8 is specially cover board, and cover board is installed on casing 6 by bolt and pin hole On, so that third opening 61 is closed/opened to the rotatable mode of third light-shielding structure 8.Further, third light-shielding structure 8 It is provided with torsional spring (not shown) between casing 6, rotates when third light-shielding structure 8 is by external force relative to casing 6 to open Third opening 61, and compress torsional spring；After external force removes, third light-shielding structure 8 then resets under the action of torsional spring and closes the Three openings 61.

The detection device of the utility model embodiment can be flicker detection equipment, and above-mentioned sample bearing device 4 can be direct For carrying sample to be tested, the loading tool that carrying is equipped with sample can be used for, sample bearing device 4 is opened by above-mentioned first Mouth 41 passes in and out darkrooms, is provided with X-ray excited polycrystalline structure scintillator between the end of probe of detection device and the sample to be tested behind entrance darkroom, such as X-ray excited polycrystalline structure scintillator can be set at the end of probe of detection device or be arranged on loading tool, preferably, the detection device End of probe can be close to X-ray excited polycrystalline structure scintillator.Wherein, detection device is examined for the generated optical signal that can be stimulated to scintillator The device of survey can be in the present embodiment photomultiplier tube, loading tool can be to allow person under test to blow and collect to be measured The sample collecting apparatus of person institute exhaled gas.

The flicker detection equipment can be used for detecting helicobacter pylori, and specifically, person under test can first take band isotope mark Remember carbon urea drug (such as urea [¹⁴C] drug), which can decomposite two with isotope labelling carbon in human body Carbonoxide, later person under test can to sample carrier or the loading tool equipped with sample carrier exhale, make sample carrier absorption have The carbon dioxide of isotope labelling carbon and become sample to be tested, then sample to be tested or above-mentioned loading tool can be placed in sample On bogey 4, enters sample bearing device 4 in darkroom and detected for detection device.Above-mentioned sample to be tested is because adsorbed same Position element label carbon [¹⁴C] carbon dioxide, low energy beta rays can be radiated, the β ray penetration power is weaker, thus pass through sample carry Sample to be tested and X-ray excited polycrystalline structure scintillator are placed in same darkroom by device 4 realizes detection, so that the β ray that sample to be tested radiates Closely X-ray excited polycrystalline structure scintillator can be excited to issue optical signal without barrier, detection device can directly incude above-mentioned optical signal, in addition, secretly Cell structure additionally provides preferable dark conditions, so that accuracy rate and efficiency that flicker detection equipment is detected are higher, It is also fairly simple in operation, conveniently, safely.

It is illustrating for progress to be implemented to the preferable of the utility model, but the invention is not limited to the reality above Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.

Claims (10)

1. a kind of darkroom structure, which is characterized in that including darkroom main body, connection darkroom master is respectively equipped in the darkroom main body First opening of the inner space of body and the second opening, wherein first opening is closed by the first light-shielding structure, institute It states the second opening and passes through the second light-shielding structure for connecting detection device, the junction of second opening and the detection device It is closed, and after first opening is closed with the junction, the inside of the darkroom main body forms dark space.

2. darkroom structure according to claim 1, which is characterized in that first light-shielding structure can the relatively described darkroom master Body movement is to be closed or opened first opening.

3. darkroom structure according to claim 2, which is characterized in that it further include sample bearing device, the sample carrying Device includes carrying platform and first light-shielding structure for being fixed on the carrying platform end, when the carrying platform passes through After the first opening insertion set depth, the darkroom main body at first light-shielding structure and first opening place End wall fitting is to close first opening.

4. darkroom structure according to claim 1, which is characterized in that second light-shielding structure includes the first shading pipe, The first shading pipe is connected to second opening, and the detection device is plugged in the first shading pipe.

5. darkroom structure according to claim 4, which is characterized in that second light-shielding structure further includes barn door, institute It states the first shading pipe to stretch out from the barn door, the barn door is equipped with the via hole for being connected to the first shading pipe, wherein The barn door is bonded with the side wall of the darkroom main body where second opening, and the first shading pipe passes through the mistake Hole and second open communication.

6. darkroom structure according to claim 5, which is characterized in that second light-shielding structure further includes relatively described The second shading pipe of the opposite side of the barn door, the second shading pipe and the first shading Guan Lian is arranged in one shading pipe Logical, the first shading pipe stretches out outside the darkroom main body, and the second shading pipe protrudes into the darkroom main body.

7. darkroom structure according to claim 4, which is characterized in that the first shading pipe is integrally connected to described second Opening.

8. darkroom structure according to claim 1, which is characterized in that second light-shielding structure includes being connected to the spy The barn door on device is surveyed, the barn door is bonded with the side wall of the darkroom main body where second opening.

9. darkroom structure according to claim 1, which is characterized in that be additionally provided with the connection inside in the darkroom main body The assist openings in space, the outer side covering of the assist openings have the hood connecting with the darkroom main body.

10. a kind of detection device, including casing, which is characterized in that further include any one of connector and claim 1 to 9 The darkroom structure corresponds to first opening on the casing and is provided with third opening, the connector respectively with it is described Darkroom main body, casing connection, and the channel for being connected to first opening, third opening, the third are equipped in the connector Opening can be closed by third light-shielding structure.