CN218099045U - Light-shielding box for experiments - Google Patents

Abstract

The utility model relates to a light-proof box for experiments, including the light-proof box body of upper shed, this internal a plurality of rooms of keeping away light that have of light-proof box all is connected with the shading lid on every room of keeping away light. The timer is fixed on the side wall of the shading box body, and the shading cover is connected with the timer through the triggering mechanism. The trigger mechanism comprises a floating rod, an electrode plate and a spring, a mechanical switch formed by the floating rod and the electrode plate is connected in series in a power supply loop of the corresponding timer, and a locking mechanism is arranged between the floating rod and the light-shading chamber. The utility model discloses can be suitable for a plurality of grease peroxide value that go on simultaneously or alternately go on simultaneously survey to can avoid each light-resistant room to produce each other and disturb when carrying out grease peroxide value survey, only need cover the shading lid can, the shading lid can be opened automatically and the suggestion operator can carry out test operation on next step when dark place stationary time reaches, use the utility model discloses can accurately control the sample at the time of placing of dark place, can greatly improve the efficiency that the tester surveyed.

Description

Light-shielding box for experiments

Technical Field

The utility model relates to a container for article are stored or are transported, concretely relates to light-shielding box for experiments.

Background

The peroxide value is an important measurement index for evaluating the quality of the grease. The quality and sanitary index of the oil-rich food have clear regulations on the limit of the peroxide value. Too high a peroxide value can be harmful to human health.

The national standard "determination of peroxide value in food safety national standard" (GB 5009.227-2016) specifies two methods for determining peroxide value in food: a titration method and a potentiometric titration method, wherein the titration method is suitable for edible animal and vegetable oil and fat, edible oil and fat products and the like, and the measurement of the sample is carried out under the condition of avoiding direct sunlight.

The national standard "determination of peroxide value in food safety national standard" (GB 5009.227-2016) specifies the following in 5.2: "weigh 2 to 3g of the grease samples prepared in 5.1, put into a 250mL iodine measuring flask, add 3mL of chloroform-glacial acetic acid mixture, and shake gently to dissolve the samples completely. Accurately adding 1.00mL of saturated potassium iodide solution, tightly plugging a bottle cap, slightly shaking for 0.5min, and then accurately standing for 3min in a dark place at 15-25 ℃. The step of "in the present application" 3min in the dark "is not applicable with any special instrument. Operators often place samples in drawers, cabinets, and other dark environments to meet the light-shielding requirements of assays. Typically, the assay chamber does not have a dedicated drawer or cabinet specifically configured for peroxide value determination. In order to facilitate the measurement, the drawer and the cabinet need to have space for placing measurement tools, which is inconvenient. The drawer and the cabinet are not specially provided with spaces for placing measuring tools, and mutual interference and collision can occur between the drawer and the cabinet and peripheral articles, so that unsafe factors are generated. If the objects in the drawer or the cabinet are needed in the measuring process, in order to not influence the light-shielding step, the user needs to wait for the completion of the light-shielding step, and therefore, the objects in the drawer or the cabinet are inconvenient to take out in the sample measuring process. Furthermore, the determination of peroxide values is not usually performed individually, and there are usually multiple samples to be determined. In order to avoid interference with each other from light, multiple samples need to be placed in different spaces or need to be performed at certain time intervals, which greatly affects the efficiency of the assay. The placement of multiple samples in different spaces not only requires more space resources, but also is prone to confusion. The accurate standing time for three minutes specified in the standard is measured by manually pressing a table by an operator, the time delay caused by inconvenient taking and placing of a measuring tool is difficult to measure, and the standing time of each sample is more difficult to judge when a plurality of samples are placed in different spaces and are simultaneously measured to cause disorder.

Patent document with the publication number of CN216806610U discloses a storage box for field sampling chemical reagents, the space in the storage box is divided into a plurality of light-shielding chambers, each light-shielding chamber is provided with an independent light-shielding cover, which can meet the requirement of storing a plurality of measuring instruments in a separated light-shielding manner, but can not meet the requirement of 'accurately standing for 3 min' in the aspect of placement time, when a plurality of samples are measured simultaneously, the standing time for accurately measuring each sample by an operator is more inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a light-proof box for experiments is difficult to the technical problem of accurate measurement time of stewing with the light-proof box who solves among the prior art.

In order to achieve the above object, the utility model discloses a lightproof box for experiments adopts following technical scheme:

a laboratory shading box comprises a shading box body with an upper opening, wherein the inner cavity of the shading box body is divided into a plurality of independent shading chambers with upper openings, and each shading chamber is connected with a shading cover which can be opened and closed to seal the upper openings of the shading chambers to form a dark box environment;

a timer is fixed on the side wall of the shading box body, and the shading cover is connected with the timer through a triggering mechanism so as to trigger the corresponding timer to start timing when the shading cover is closed and open the shading cover after timing is finished;

the trigger mechanism comprises a floating rod capable of moving up and down, an electrode plate arranged at the bottom of the light avoiding chamber, and a spring arranged between the floating rod and the bottom wall of the light avoiding chamber, wherein the floating rod comprises a floating state that the upper end extends out of the light avoiding chamber under the action of the elastic force of the spring to open the light shielding cover and a sinking state that the lower end is pressed by the light shielding cover to be in conductive contact with the electrode plate;

the mechanical switch formed by the floating rod and the electrode plate is connected in series in a power supply loop of the corresponding timer;

and a locking mechanism is arranged between the floating rod and the light avoiding chamber, and is used for locking the floating rod in a sinking state in the timing process of the timer and releasing the locking of the floating rod after the timing of the timer is finished.

Furthermore, the locking mechanism comprises an elastic buckle, a lock hole and an electromagnet, the elastic buckle comprises a spring end and a lock catch end made of a magnetic material, the lock hole is formed in the side wall of the shading box body, and the electromagnet is installed in the lock hole; a horizontal mounting groove extending along the horizontal direction is formed in the floating rod, the spring end of the elastic buckle is mounted in the horizontal mounting groove, the position of the lock hole corresponds to the position of the elastic buckle on the floating rod in a sinking state, and the polarity of the end part of the electromagnet opposite to the buckle end is opposite when the electromagnet is electrified; the electromagnets are connected in series in the power supply circuit of the corresponding timer.

Furthermore, the upper side groove wall of the lock hole is flush with the upper end face of the lock end on the floating rod in a sinking state, and the lock end retracts towards the end part of the lock hole to form a guide structure; the electromagnet is lower than the lock catch end on the floating rod in a sinking state.

Further, the light-avoiding chamber has a height H, a length L and a width W, wherein 17.5cm > H > 16.5cm, wherein L > 9cm, and wherein W > 9cm.

Furthermore, L is more than or equal to 12cm and more than or equal to 10cm, wherein W is more than or equal to 12cm and more than or equal to 10cm.

Further, L = W =11cm, and H =17cm.

Furthermore, the number of the light-avoiding chambers is 9,9, the light-avoiding chambers are arranged in a nine-square grid form, timer placing frames for placing timers are fixed on the side wall of the light-avoiding box body, and the number of the timer placing frames is 5,5 timer placing frames which are arranged in a staircase shape.

Furthermore, timer placing frames for placing timers are fixed on the side walls of the shading box body, and the number of the shading chambers is equal to that of the timer placing frames.

Furthermore, the shading box further comprises a lifting cover, a lifting handle is arranged on the lifting cover, a hasp is arranged on the shading box body, and a lapping ring matched with the hasp is arranged on the lifting cover.

Further, the shading box body and the shading cover are both made of shading materials.

The utility model has the advantages as follows: the utility model discloses in have a plurality of spaced light-resistant rooms each other to can be suitable for a plurality of grease peroxide value measurement going on simultaneously or alternately going on simultaneously, and can avoid each light-resistant room to produce each other and disturb. The timer is connected with the shading cover through the trigger mechanism, so that the corresponding timer starts to time when the shading cover is closed; the timer is connected with the locking mechanism, so that the shading cover can be automatically opened when the countdown of the timer is finished. Therefore, when the peroxide value of the grease is measured, only the shading cover needs to be covered, and when the standing time of the grease in a dark place is up, the shading cover can be automatically opened to prompt an operator to carry out the next test operation.

Furthermore, the size of the light-shading chamber is matched with the size of the triangular flask used for measuring the peroxide value of the grease, so that space waste is avoided, and an operator can conveniently take and place the triangular flask for measuring the peroxide value of the grease.

Further, the cover is portable, so that the cover can be conveniently moved to a proper position according to the requirement of the environment for measuring the peroxide value of the grease, and an operator can conveniently operate the cover.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of an experimental light-shielding box of the present invention;

FIG. 2 is a schematic view of the light-shielding box of FIG. 1 with the open attachment ring;

FIG. 3 is an exploded view of the experimental light box of FIG. 1 (the light covers are closed only for illustration, and do not show an actual usage status);

FIG. 4 is a schematic view of the shading box body in FIG. 1 in use;

FIG. 5 is a front view of FIG. 1;

FIG. 6 is a sectional view taken along line A in FIG. 5;

FIG. 7 is a sectional view taken along line B in FIG. 5;

FIG. 8 is a partial schematic view at C of FIG. 6;

FIG. 9 is a partial schematic view at D of FIG. 7;

FIG. 10 is a schematic circuit diagram of a practical light box of FIG. 1;

fig. 11 is a schematic structural diagram of a second embodiment of the experimental light-shielding box of the present invention.

Detailed Description

The utility model discloses an embodiment one of light-proof box for experiments:

the utility model discloses a concrete structure of light-shielding box for experiments is as shown in fig. 1 to fig. 10, including an upper shed light-shielding box body 10 and a lift lid 20, should carry lid 20 demountable installation on this light-shielding box body 10. When the lift cap 20 is mounted to the light-shielding box body 10, a user can lift the light-shielding box body 10 by means of the lift cap 20 and move the light-shielding box body 10 to a proper position. When the light shielding box is in an idle state, the carrying cover 20 is mounted on the light shielding box body 10, so that the light shielding box body 10 can be protected, the pollution of the light shielding box body 10 caused by pollutants such as dust is reduced, and especially the pollution of the pollutants such as dust to the opening of the light shielding box body 10 is avoided.

The light shielding box body 10 includes a light shielding main body 11. The light blocking body 11 forms nine light blocking chambers 110 arranged in a grid pattern and spaced apart from each other. The light shielding box body 10 further includes a light shielding cover 12 corresponding to each light shielding chamber 110 for closing the light shielding chamber 110, so that the light shielding chamber 110 generates a light shielding environment. When the light-shielding lid 12 is opened, a grease peroxide value measuring triangular flask M can be easily put in and taken out. When the triangular flask M containing the measuring reagent is placed in the light-shielding chamber 110, the light-shielding cover 12 is closed, so that the light-shielding chamber 110 generates a light-shielding environment, thereby generating the effect of placing in the dark. After a predetermined time, for example, 3 minutes, the light-shielding lid 12 is opened, so that the triangular flask M placed in the light-shielding chamber 110 can be conveniently taken out.

In order to facilitate timing, the shading box of the present invention further comprises a timer rack 30 and at least one timer 40. The timer 40 is disposed on the timer holder 30 to record and indicate the time for which the triangular flask M is disposed in the dark room 110, i.e. to time the "light-shielding step" for measuring the peroxide value of grease. In order to facilitate the light shielding step of grease peroxide value measurement by the light shielding chambers 110 simultaneously or alternately, the timer rack 30 includes five timer racks 31 arranged in a staircase shape so as to accommodate a plurality of timers 40 corresponding to different light shielding chambers 110. It should be noted that the plurality of placement bases 31 are attached to the side surface of the light shielding body 11 and arranged in a staircase shape, which is advantageous for the user to determine the light shielding chamber 110 corresponding thereto and further determine the light shielding chamber 110 corresponding to the timer 40 placed thereon.

The reason why the five timer holders 31 are provided is that when the peroxide value measurement is performed on a plurality of grease samples in sequence, the step of "shielding from light for 3 minutes" for the first sample is completed when the step of "shielding from light for 3 minutes" for the 6 th sample is required in general. The timing of the 6 th sample can therefore use the same timing means as the timing of the first sample. Of course, in other embodiments, the number of timers 40 may be the same as the number of light-shielding chambers 110.

The light shielding box further comprises a trigger mechanism 50 arranged in the light shielding box body 10, wherein the trigger mechanism 50 comprises a floating rod 51 capable of moving up and down, an electrode plate 52 fixedly arranged at the bottom of each light shielding chamber 110, and a spring 53 arranged between the floating rod 51 and the bottom wall of the light shielding chamber 52. The floating rod 51 is made of conductive material or includes a conductive contact at the lower end to form a mechanical switch structure with the electrode plate 52. The spring 53 is a compression spring, and its supporting capacity is larger than the gravity of the floating lever 51 and the gravity of the shade cover 12 in a normal state, so that the floating lever 51 and the shade cover 12 can be supported by the spring 53 when no external force is applied, and the shade cover 12 is in an open state. The light shielding body 11 is provided with a guide groove extending vertically, and the floating rod 51 is installed in the guide groove to move vertically. The height of the floating rod 51 may be greater than the height H of the light-avoiding chamber 110, or may be less than or equal to the height H of the light-avoiding chamber 110, as long as it is higher than the light-avoiding chamber 110 when being supported by the spring 53 and supports the light-shielding cover 12. When the height of the floating rod 51 is greater than the height H of the light-avoiding chamber 110, it is necessary to form a groove in the light-shielding body 11 so that the upper end of the floating rod 51 can sink into the light-avoiding chamber 110 so as not to interfere with the closing of the light-shielding cover 12.

The shading box also comprises a locking mechanism 70 arranged between the floating rod 51 and the shading main body 11, the locking mechanism 70 comprises an elastic buckle 71 arranged in the middle of the floating rod 51, a lock hole 72 arranged in the shading main body 11 and an electromagnet 73 fixedly arranged in the lock hole, the elastic buckle 71 is horizontally installed in a horizontal installation groove formed on the floating rod 51, the spring end 711 of the elastic buckle is fixed at the bottom of the horizontal installation groove, and the locking end 712 of the elastic buckle is made of a magnetic material. The position of the lock hole 72 corresponds to the position of the elastic latch 71 when the floating lever 51 is pressed down, and the electromagnet 73 is energized to attract the latch end 712 to extend in the radial direction and enter the lock hole 72 to prevent the light shield cover 12 from being lifted up by the floating lever 51. It should be noted that: when the spring end 711 is ejected, the ejection margin is small, so that when the locking end 712 is completely attracted to the electromagnet 73 to the outer end, the inner end is kept in the horizontal mounting groove, and the floating rod 51 can be completely prevented from floating upwards through the stop matching between the locking end 712 and the upper wall of the locking hole 72.

In this embodiment, the upper side groove wall of the lock hole 72 is flush with the upper end surface of the locking end 712 of the floating rod 51 in the sinking state, so that there is no clearance allowance for upward movement after the locking end 712 enters the lock hole 72, and in this case, in order to ensure that the locking end 712 can smoothly enter the lock hole 72, the locking end 712 is retracted toward the end of the lock hole 72 to form a guiding structure. At the same time, the electromagnet 73 is positioned slightly below the latching end 712 to create a downward pulling force component on the latching end 712. It will be appreciated, of course, that in other embodiments, the electromagnet 73 may be flush with the latching end 712; the upper side wall of the locking hole 72 may be higher than the upper end surface of the locking end 712 of the floating rod 51 in the depressed state so that the locking end 712 can enter the locking hole 72. In this case, the latching end 712 can be fixed by virtue of the attraction force between the latching end 712 and the electromagnet 73 to prevent the floating lever 51 from continuing to float under the action of the spring 53.

Therefore, the floating rod 51 has two operating states, the first operating state is a floating state, and the upper end of the floating rod 51 extends out of the light shielding chamber 110 under the elastic force of the spring 53, so that the light shielding cover 12 can be opened; the second working state is a sinking state, in which the elastic buckle 71 in the floating rod 51 extends into the lock hole 72, and at this time, the upper end of the floating rod 51 is lower than the light-avoiding chamber 110, and the light-shielding cover 12 can be kept in a closed state.

The timer 40 is a mature product disclosed in the prior art, and may be of the type SH-702, which includes a display screen and a delay switch, and the delay time of the delay switch is adjustable, and the delay switch is normally closed when the timer is normally closed, and the delay switch is turned off when the delay time (i.e., the set timing time) is over. The mechanical switch formed by the floating rod 51 and the electrode plate 52 is connected in series in the power supply circuit of the timer 40, and the electromagnet 73 is also connected in series in the power supply circuit of the timer 40, so when the light shielding cover 12 is covered to enable the floating rod 51 to be in contact with the electrode plate 52, the electromagnet 73 is electrified to enable the elastic buckle 71 to be in a locking state, and meanwhile, the timer 40 starts counting down; after the timer 40 finishes timing, the electromagnet 73 loses power along with the disconnection of the delay switch, the elastic buckle 71 automatically retracts, the floating rod 51 floats under the elastic force of the spring 53 to support the shading cover 12, and therefore the effects of automatic timing when the shading cover 12 is closed and automatic opening of the shading cover 12 when the timing is finished are achieved. In other embodiments, a timer which only has a countdown display function and does not have an automatic power-off function when countdown is finished can be selected, and the switch of the corresponding branch is manually turned off by observing countdown time so as to unlock the locking mechanism and realize automatic uncovering of the shading cover. When the timer does not have the function of automatically cutting off power at the end of countdown, the timer may include a buzzer to prompt the user of the end of countdown.

In other embodiments, the timer holder 30 can be omitted, and the timer 40 can be directly fixed on the outer sidewall of the shading box body 10 by using a bolt connection method, an adhesive connection method or other methods.

The light-shielding procedure for lipid peroxidation value determination frequently employs a 250ml triangular flask with a stopper. Therefore, the shape and size of the light-shielding chamber 110 are adapted to the shape and size of a 250ml triangular flask with a plug. The dimensions of a commonly used 250ml triangular flask with a stopper are approximately as follows: the diameter of the bottom is 9cm, the diameter of the bottle mouth is 3.5cm, and the height of the plug is 16.5cm. The vertical cross section of the light-shielding chamber 110 is rectangular, wherein the height H of the light-shielding chamber 110 is more than or equal to 16.5cm. Preferably, the height 17.5cm > H ≧ 16.5cm of the light-avoiding chamber 110. In this embodiment, the height H =17cm of the light-avoiding chamber 110.

The light-shielding chamber 110 has a rectangular transverse cross-sectional shape. According to the first preferred embodiment of the present invention, the lateral cross-sectional shape of the light-shielding chamber 110 is a square. Specifically, the length L of the light-avoiding chamber 110 is more than 9cm, and the width W of the light-avoiding chamber 110 is more than 9cm. Preferably, L is more than or equal to 12cm and more than or equal to 10cm, wherein W is more than or equal to 12cm and more than or equal to 10cm. In this embodiment, the length L =11cm of the light avoiding chamber 110, and the width W =11cm of the light avoiding chamber 110.

It should be noted that the above-mentioned dimension of the light-shielding chamber 110 can not only meet the requirement of 250ml triangular bottle with plug M used in the light-shielding step for determining the peroxide value of grease, but also ensure that the triangular bottle with plug M can be conveniently taken out from the light-shielding chamber 110, and simultaneously avoid the space waste and material waste.

Of course, it can be understood that when the present invention is used to perform other light-shielding experiments, the size of the light-shielding chamber 110 needs to be adjusted according to the size of the test container placed therein.

Referring to fig. 1 to 3, the light-shielding box includes a detachable coupling assembly 60 for detachably coupling the lift cap 20 and the light-shielding box body 10. The detachable connection assembly 60 includes at least one snap 61 and at least one snap ring 62, wherein the snap 61 and the snap ring 62 are respectively and integrally and fixedly connected with the light-shielding box body 10 and the lift cap 20, so that the lift cap 20 and the light-shielding box body 10 can be detachably connected through the detachable connection between the snap 61 and the snap ring 62.

It is worth mentioning that, in order to ensure the light shielding effect of the light shielding chamber 110, the light shielding body 11 and the light shielding cover 12 are made of a light shielding material, wherein the light shielding material may be an integral light shielding material, or may be a common material whose inner wall is coated with a light shielding coating, such as a black light shielding coating. The utility model discloses do not limit to this.

The utility model discloses an embodiment two of light-proof box for experiments:

the structure of the second embodiment is shown in fig. 11, which is different from the first embodiment in that the inner cavity of the light shielding box body 10 is divided into 6 light shielding chambers 110, six timer holders 31 are disposed on the side wall of the light shielding box body 10, and each light shielding chamber 110 has a timer 40 uniquely corresponding to it.

The utility model discloses an embodiment three of light-proof box for experiments:

the difference between the third embodiment and the first embodiment is that: the light shielding box includes a marking assembly to differentially mark the plurality of light shielding chambers 110 of the light shielding box body 10 so that an operator can more easily remember the light shielding chamber 110 where the grease sample is placed and the corresponding timer 40. Specifically, the marking member marks the light shielding cover 12 of each light shielding chamber 110 and the timer setting table 31 of the timer 40 corresponding thereto by color. The light shielding cover 12 and the timer setting table 31 corresponding thereto are set as one group, and different colors are set between different groups to show distinction. After designing the marking assembly, when the locking mechanism 7 is out of order and cannot be automatically unlocked, the experimenter can manually open the corresponding light shielding cover 12 according to the information of the end of the countdown time sent by the timer 40.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a light-proof box for experiments, includes upper shed light-proof box body, its characterized in that: the inner cavity of the shading box body is divided into a plurality of independent shading chambers with upper openings, and each shading chamber is connected with a shading cover which can be opened and closed and can seal the upper openings of the shading chambers to form a dark box environment;

a timer is fixed on the side wall of the shading box body, and the shading cover is connected with the timer through a triggering mechanism so as to trigger the corresponding timer to start timing when the shading cover is closed and open the shading cover after timing is finished;

the trigger mechanism comprises a floating rod capable of moving up and down, an electrode plate arranged at the bottom of the light avoiding chamber, and a spring arranged between the floating rod and the bottom wall of the light avoiding chamber, wherein the floating rod comprises a floating state that the upper end extends out of the light avoiding chamber under the action of the elastic force of the spring to open the light shielding cover and a sinking state that the lower end is pressed by the light shielding cover to be in conductive contact with the electrode plate;

a mechanical switch formed by the floating rod and the electrode plate is connected in series in a power supply loop of the corresponding timer;

and a locking mechanism is arranged between the floating rod and the light avoiding chamber, and is used for locking the floating rod in a sinking state in the timing process of the timer and releasing the locking of the floating rod after the timing of the timer is finished.

2. The experimental lightproof box of claim 1, characterized in that: the locking mechanism comprises an elastic buckle, a lock hole and an electromagnet, the elastic buckle comprises a spring end and a lock catch end made of a magnetic material, the lock hole is formed in the side wall of the shading box body, and the electromagnet is installed in the lock hole; a horizontal mounting groove extending along the horizontal direction is formed in the floating rod, the spring end of the elastic buckle is mounted in the horizontal mounting groove, the position of the lock hole corresponds to the position of the elastic buckle on the floating rod in a sinking state, and the polarity of the end part of the electromagnet opposite to the lock end is opposite when the electromagnet is electrified; the electromagnets are connected in series in the power supply circuit of the corresponding timer.

3. The experimental lightproof box of claim 2, characterized in that: the upper side groove wall of the lock hole is flush with the upper end face of the lock catch end on the floating rod in a sinking state, and the lock catch end is inwards shrunk towards the end part of the lock hole to form a guide structure; the electromagnet is lower than the lock catch end on the floating rod in a sinking state.

4. The experimental lightproof box of claim 1, characterized in that: the height of the light avoiding chamber is H, the length of the light avoiding chamber is L, the width of the light avoiding chamber is W, wherein 17.5cm is larger than H and larger than 16.5cm, L is larger than 9cm, and W is larger than 9cm.

5. The experimental shading box of claim 4, wherein: l is more than or equal to 12cm and more than or equal to 10cm, wherein W is more than or equal to 12cm and more than or equal to 10cm.

6. The experimental shading box of claim 5, wherein: l = W =11cm and H =17cm.

7. The shading box for experiments according to any one of claims 1 to 6, wherein: the number of the light-proof chambers is 9,9, the light-proof chambers are arranged in a grid form, timer placing frames used for placing timers are fixed on the side wall of the light-proof box body, and the number of the timer placing frames is 5,5 timer placing frames which are arranged in a stair shape.

8. The shading box for experiments according to any one of claims 1 to 6, wherein: the side wall of the shading box body is fixedly provided with timer placing frames for placing timers, and the number of the shading chambers is equal to that of the timer placing frames.

9. The light-shielding box for experiments as claimed in any one of claims 1 to 6, wherein: still including carrying the lid, carry and cover and be provided with the handle, the hasp has been seted up on the shading case body, carry cover be provided with be used for with hasp complex takes the ring.

10. The shading box for experiments according to any one of claims 1 to 6, wherein: the shading box body and the shading cover are both made of shading materials.

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