JP6668450B2 - Demonstration device of mask filter action that can be compared - Google Patents

Description

  The present invention relates to the field of educational demonstration equipment, and more particularly to a demonstration device for a comparable mask filter effect.

  Because factories are an environment full of uncertain factors, they are equipped with various factory protective equipment, and the main protective equipment includes special leather shoes, helmets, gloves, and dust masks.

  Of the dustproof equipment for factories, dust masks are the most easily overlooked, but in fact they are very important protective tools. The main working component of the dust mask is a mask filter, and as shown in FIG. 9, the mask filter includes a conical filter column 401 and a filter cover 402. In order to make students fully aware of the effects of dust masks, there are some schools that set up demonstration courses and use demonstration tools at that time, but since conventional demonstration tools are simple, While it is difficult to efficiently compare and verify, the education takes a long time because students must experience each one in a simulation environment with a dust mask.

  An object of the present invention is to provide a demonstration device of a mask filter function that can be compared, in which a dust receiving partition plate is installed in the middle of a rotatable dust receiving frame, and a mask filter and a mask that communicate with internal cavities on both sides are provided. Dust-proof effect of the mask filter compared to the mask can be directly expressed by the amount of dust in the two dust-receiving contrast blocks installed at the bottom of the dust-receiving frame, each equipped with a contrasting device as an operating part And good and efficient educational effects occur.

To achieve the above object, the technical solution used by the present invention is as follows. This is a demonstration device of a mask filter function which can be compared, which is provided with a cabinet, in which a dust cavity sealed through a partition plate and a demo cavity opened on the right side in front view are formed, and a dust cavity is formed in the partition plate. A communication port is provided to communicate the dust cavity with the demonstration cavity, and a dust receiving movable motor and a dust receiving movable screw are provided at the top of the demo cavity, and a dust receiving movable block is mounted on the dust receiving movable screw. Linked, a dust receiving rotary motor is installed below the dust receiving movable block, a dust receiving frame is installed below the dust receiving rotary motor, a dust receiving partition plate is installed inside the dust receiving frame, and at the bottom of the dust receiving frame located on the front view both sides of the dust receiving partition plate, both dust receiving comparing block Is installed, contrasting device according to the dust receiving frame front view left and right sides in the mask filter and the actuating piece mask that communicates with the internal cavity of respectively attached, cooperating with the mask filter and comparison device are both communication port.

Furthermore, the in front view the left edge of the communication port is a front view left large, it is fixed a small mask seal taper sleeve front view right, opening the front view the right end of the mask seal taper sleeve is larger than the column of the filter, off It is smaller than the outside diameter at the left end of the filter cover.

  Further, a ventilation stop block is provided in the dust cavity at a position located above and below the communication port, and a blow-off air pump for blowing air toward the center is provided above and below the dust cavity. On the side wall of the dust cavity, a material charging opening cover is provided at a position between the two ventilation stop blocks, and the material charging opening cover is inserted into and linked to the side wall of the dust cavity. A body-injection opening handle provided outside the material-injection opening cover body; and a vertically fixed position fixing hole of the cover body in upper and lower sides of the material-injection opening cover body; The position fixing insert block of the cover body is connected to the position fixing hole of the body via the position fixing spring of the cover body, and the dust cavity is fixed. A position fixing slot of the cover body is provided in a side wall of the cover body in association with the position fixing insert block of the cover body.

  Further, a filter communication hole for communicating with a filter is provided on a left side plate of the dust receiving frame, and a filter tightening device is installed on upper and lower sides of the filter communication hole, and the filter tightening device is provided outside a side plate of the dust receiving frame. A filter tightening mounting block fixed to the filter tightening block, the filter tightening mounting block is connected to a filter communication hole through one side of the filter tightening mounting block, a filter tightening block is connected to the filter cover via a filter tightening spring, A filter tightening opening rod with a handle is fixedly provided outside the filter tightening block, and the filter tightening opening rod is penetrated by the filter tightening mounting block and is linked therewith.

Further, the outside of the filter communication hole is a conical hole linked to the cover of the filter, the inside is a cylindrical hole matching the right end of the column of the filter in front view , and a tightening compound hole is provided on the outside of the filter cover. A filter tightening insert rod is installed inside the filter tightening block in association with the tightening hole.

Further, the contrast device includes a contrast cover which is fitted on the right side plate of the dust receiving frame when viewed from the front and is located on the same straight line as the column of the filter, and the size of the opening of the contrast cover is the column of the filter. of which coincide with the front view left, the mask is attached via a locking sleeve of the mask viewed from the front right end of the comparison cover vent is provided and which coincides with the opening of the comparison covers the center of the mask lock sleeve.

Further, the dust receiving frame has no bottom frame, and a dust receiving bottom frame is linked below the dust receiving frame, and the dust receiving frame and the dust receiving partition are inserted into and linked to the dust receiving frame and the dust receiving partition plate. An insert rod is installed, the dust receiving contrast block is installed in a dust receiving bottom frame, bottom frame sandwiching ports are provided on both left and right sides in front view of the dust receiving frame, and a bottom frame is provided in a right bottom in front view of the demo cavity. A bottom frame loading / unloading device associated with the pinch opening is installed.

Further, the dust receiving bottom frame loading / unloading device includes a bottom frame holding / lifting cylinder installed on a bottom frame of a cabinet, and the bottom frame holding / lifting cylinder is provided with a bottom frame holding cylinder that is oriented in a horizontal left-right direction when viewed from the front. When the bottom frame sandwiching block is connected to the bottom frame sandwiching port on the left and right sides of the frame sandwiching cylinder in front view , and when the bottom frame sandwiching block is inserted and linked with the bottom frame sandwiching port, the lower portion of the dust bottom frame sandwiches the bottom frame sandwiching. Linked to the top of the cylinder.

  Further, the cabinet is provided with a sandwich buffer cover at a position located below the bottom frame sandwich cylinder, a sandwich buffer hole is provided in the sandwich buffer cover, and a sandwich buffer spring is installed in the sandwich buffer hole, The holding buffer column is connected to the holding buffer spring, and the upper portion of the holding buffer column is connected to the bottom frame holding cylinder.

  Further, a connection block of a spring is installed on an upper portion of the pinch buffer spring, the connection block of the spring is an inverted T-shape, and a vertical portion is a trimming bolt. A buffer column connecting shaft is mounted on and linked with the thread of the connection block, and a buffer column connecting shaft is provided below the bottom frame holding cylinder and is connected to the upper portion of the buffer column. A pillar position fixing circular groove is provided, and a position fixing arc block movable groove is provided at a place where the sandwiching buffer column is associated therewith, and the position fixing arc block movable groove is connected to the buffer column position fixing circular groove. A block is installed, and a fixed position arc-shaped movable tightening rod that is inserted into and interlocked with the shock-absorbing column so as to be tightly fitted therewith is sandwiched between the shock-absorbing column position fixed arc-shaped blocks and connected. .

  The beneficial effects of the present invention are as follows.

  1, a dust receiving partition plate is installed in the middle of the rotatable dust receiving frame, and a mask filter communicating with the cavity and a contrasting device using a mask as an operating part are attached to both sides, and installed at the bottom of the dust receiving frame. The amount of dust in the two dust receiving / comparing blocks makes it possible to directly express the dust prevention effect of the mask filter compared to the mask, and a good and efficient educational effect occurs.

  2. The design of the mask sealing taper sleeve allows the mask filter to be sealed, ensuring that dust only comes out of the filter mask and the comparison device.

  3. The design that combines the material charging cover and the dust-spraying structure in the dust cavity makes it easier to charge the material and forms a relatively flowable dust space in a simulated factory.

  4. The design of the filter tightening device makes it easy to tighten and remove the mask filter, and the dustproof mask can be replaced more easily.

  5.The structure of the filter communication hole, and the insertion and connection of the filter tightening insert rod and the tightening compound hole, properly perform the role of tightening and positioning the mask filter when tightening, and proceed with the demonstration smoothly. Secure.

  6. The contrast device has a simple structure and it is convenient to put the mask in and out.

  7. The design of the dust catching frame makes it easy to take out and replace the dust catching contrast block, and improve the test operation efficiency when performing the test several times.

  8. The dust receiving frame insertion / removal device has a simple structure, is easy to operate, and can properly put the dust receiving frame in and out.

  9.The design of the pinch buffer cover and pinch buffer spring plays the role of buffer when putting the dust receiving frame in and out, ensuring stability when putting it in and out, and the dust receiving comparison block has excellent dust receiving contrast effect. To secure.

  10.By the design of the position fixed arc-shaped block movable circular groove, the position fixed arc-shaped movable tightening rod and the buffer column position fixed circular groove, the rotation of the pinching buffer column can be realized, combined with the structure of the spring connection block, Easy removal and maintenance.

It is front sectional drawing which shows the structure of the demonstration apparatus of a mask filter effect which can be compared. It is a figure showing the structure of a test part. It is a figure showing the structure of a filter fastening device. It is a figure which shows the structure of a dust receiving bottom frame taking-in / out apparatus. FIG. 5 is a partially enlarged view of A in FIG. 4. FIG. 6 is a sectional view taken along line BB in FIG. It is a figure which shows the structure of a material charging opening cover. FIG. 2 is a partially enlarged view of C in FIG. 1. FIG. 3 is a diagram illustrating a structure of a mask filter.

  In order for those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail with reference to the drawings. The description of this part is only proof and interpretable, and the scope of protection of the present invention is not limited at all.

As shown in FIGS. 1 to 9, the specific structure of the present invention is as follows. This is a demonstration device of a mask filter function that can be compared, which is provided with a cabinet 1, in which a dust cavity sealed through a partition plate 2 and a demo cavity opened on the right side in front view are formed, and a partition plate is formed. 2 is provided with a communication port 3 for communicating the dust cavity and the demo cavity, and a dust receiving movable motor 15 and a dust receiving movable screw 16 which are linked to each other are installed above the demo cavity. A movable receiving block 17 is mounted and linked, a dust receiving rotary motor 21 is installed below the dust receiving movable block 17, a dust receiving frame 22 is installed below the dust receiving rotary motor 21, and dust receiving partition plate 24 is installed in the middle of the frame 22, and at the bottom of the dust receiving frame 22 located in front view both sides of the partition plate 24 receives dust, either Dust receiving comparing block 23 is installed, the mask filter 4 and comparison device 13 that the mask and the working part which communicates with the cavity, respectively viewed from the front left and right side plates of the dust receiving frame 22 is attached, the mask filter 4 and comparison device 13 Are linked to the communication port 3.

Preferably, a mask sealing taper sleeve 8 having a large front left side and a small right front view is fixed to the left end of the communication port 3 in a front view, and an opening at the right end of the mask sealing taper sleeve 8 in a front view is a filter column 401. It is larger and smaller than the outer diameter of the filter cover 402 at the left end in front view .

  Preferably, the dust cavity is provided with a ventilation stop block 10 at a position located above and below the communication port 3, and a blow-off air pump 11 that blows air toward the center above and below the dust cavity. The material input / opening cover 12 is installed at a position between the two ventilation stop blocks 10 on the side wall of the dust cavity, and the material input / opening cover 12 is inserted into the side wall of the dust cavity. A cover is provided with an associated material input / opening cover body 45, and a material input / opening handle 46 is installed outside the material input / opening cover body 45, and a vertically directed upper and lower side of the material input / opening cover body 45. A position fixing hole of the body is provided, and a position fixing insert block 48 of the cover body is connected to the position fixing hole of the cover body via a position fixing spring 47 of the cover body. In addition, a position fixing slot of the cover body is provided on the side wall of the dust cavity, which is linked with the position fixing insert block 48 of the cover body.

Preferably, a filter communication hole 51 for communicating with the filter 401 is provided on the left side plate of the dust receiving frame 22 when viewed from the front , and a filter tightening device 14 is provided above and below the filter communication hole 51. A filter tightening mounting block 52 fixed to the outside of the side plate of the frame 22 is provided.On one side of the filter tightening mounting block 52 toward the filter communication hole 51, a filter cover 402 is provided via a filter tightening spring 53. The filter tightening block 54 is connected to the filter tightening block 54, a filter tightening opening rod 56 with a handle is fixed outside the filter tightening block 54, and the filter tightening opening rod 56 is attached to the filter tightening mounting block. It is penetrated by 52 and linked.

  Preferably, the outside of the filter communication hole 51 is a conical hole that is linked to the filter cover 402, the inside is a cylindrical hole that fits the right end of the filter column 401, and a tightening compound hole is formed outside the filter cover 402. 403 is provided, and inside the filter tightening block 54, a filter tightening insert rod 55 associated with the tightening combination hole 403 is installed.

Preferably, the comparison device includes a comparison cover 26 which is fitted on the right side plate of the dust receiving frame 22 in a front view and is positioned on the same straight line as the column 401 of the filter, and the size of the opening of the comparison cover 26. Is aligned with the left end of the filter column 401 when viewed from the front, the mask 27 is attached to the right end of the comparison cover 26 via the mask lock sleeve 28, and the opening of the comparison cover 26 is located at the center of the mask lock sleeve 28. A matching vent is provided.

Preferably, the dust receiving frame 22 has no bottom frame, and a dust receiving bottom frame 29 is linked to a lower portion of the dust receiving frame 22 so that the dust receiving frame 22 and the dust receiving partition plate 24 are tightly fitted to the dust bottom frame 29. An insert rod 30 of a bottom frame to be inserted and linked is installed, the dust receiving / comparing block 23 is installed in a dust receiving bottom frame 29, and a bottom frame sandwiching opening 31 is provided in a front view left and right side plate of the dust receiving frame 22; At the bottom of the demo cavity on the right side in front view, a bottom frame insertion / removal device 19 that is linked to the bottom frame insertion port 31 is installed.

Preferably, the dust receiving bottom frame loading / unloading device 19 includes a bottom frame holding / lifting cylinder 34 installed on the bottom frame of the cabinet 1, and the bottom frame holding / lifting cylinder 34 is directed to the bottom frame holding / lifting cylinder 34 in a horizontal horizontal direction when viewed from the front. The bottom frame sandwiching block 32 is connected to the bottom frame sandwiching port 31 on both left and right sides of the bottom frame sandwiching cylinder 33 when viewed from the front , and the bottom frame sandwiching block 32 is inserted into and linked with the bottom frame sandwiching port 31. At this time, the lower portion of the dust bottom frame 29 is linked with the upper portion of the bottom frame sandwiching cylinder 33.

  Preferably, the cabinet 1 is provided with a pinch buffer cover 35 at a position below the bottom frame pinching cylinder 33, a pinch buffer hole is provided in the pinch buffer cover 35, and a pinch buffer spring is provided in the pinch buffer hole. A clamp 36 is provided, a clamp buffer 37 is connected to the clamp buffer spring 36, and an upper portion of the clamp buffer 37 is connected to the bottom frame clamp cylinder 33.

  Preferably, a spring connection block 38 is provided above the pinch buffer spring 36, the spring connection block 38 has an inverted T-shape, and a vertical portion is a trim bolt, and the pinch buffer column 37 A threaded thread of a connection block 38 of a spring is mounted on and linked to a lower portion of the cylinder, and a cushioning column connecting shaft 39 which is mounted and linked to an upper portion of a clamping cushioning column 37 is installed below the bottom frame clamping cylinder 33, A buffer column position fixing circular groove 43 is provided in the middle of the buffer column connecting shaft 39, and a position fixing arc block movable groove 41 is provided at a place where the sandwiching buffer column 37 is linked therewith, and the position fixed arc block movable groove 41 is provided. A buffer column position fixing arc-shaped block 40 that is linked to the buffer column position fixing circular groove 43 is installed, and is inserted into the buffer column position fixing arc-shaped block 40 so as to penetrate the buffer column 37 and tightly fit therewith so as to fix the position. Arc The movable clamping rod 42 is connected.

  At the time of concrete use, after assembling the equipment, assembling the mask filter 4 and the mask 27 at the same time, then opening the material loading and opening cover 12, putting the dust cavity into the dust cavity, and then loading the material After the closing cover 12 is closed and the cover body position fixing insert block 48 is inserted into the cover body position fixing slot, the dust receiving frame 22 is moved to the left by the dust receiving movable motor, and the mask filter 4 is further tapered to seal the mask. The sealing work for the mask filter 4 is completed by sticking the sleeve to the sleeve. Then, the dust is blown off by the synergistic action of the air pump 11 which blows up and down to maintain a constant fluidity, thereby forming a dust environment in the simulated factory, and then the breathing pump is started, and the starting time is 5 minutes. Minutes, then the operation of the breathing pump 25 is stopped, and the dust that has passed through the mask filter 4 falls into the corresponding dust receiving comparison block 23, and then the dust receiving frame 22 is moved rightward by the dust receiving movable motor 15. After moving the dust receiving frame 22 by the dust receiving rotating motor 21 to rotate the dust receiving frame 22 by 180 degrees, the dust moving frame 15 is moved to the left by the dust moving motor 15, and the mask lock cover 28 is moved to the mask sealing tape sleeve. 8 and then start the breathing pump, set the operation time to 5 minutes in the same way, and after the dust that has passed through the mask falls to the appropriate dust receiving contrast block 23, the dust receiving movable motor 15 Dust pan The bottom frame 22 is moved to the right above the dust receiving bottom frame loading / unloading device 19, and then the bottom frame sandwiching cylinder 33 is moved by the lifting cylinder 34 which sandwiches the bottom frame to the dust receiving bottom frame 29, and the bottom frame sandwiching is performed. The bottom frame sandwiching block 32 is moved by the cylinder 33 to be inserted into the bottom frame sandwiching port 31, the bottom frame sandwiching elevating cylinder 34 is contracted downward, and the dust receiving bottom frame 29 is pulled out. In this process, the pinch buffer spring plays a good buffering role, then takes out the dust receiving comparison block 23 in the dust receiving bottom frame 29, inserts a new dust receiving comparison block 23, and then lifts the bottom frame pinching cylinder. 34, the dust receiving bottom frame 29 is inserted below the dust receiving frame 22, and then the dust receiving bottom frame taking-in / out device 19 is returned to the original position, the mask 27 is manually removed, and a new mask 27 is inserted. When the two dust receiving comparison blocks 23 taken out of the dust receiving bottom frame 29 to be replaced are compared, the amount of dust in the dust receiving comparison block 23 corresponding to the mask 27 is apparent from the dust receiving comparison block 23 corresponding to the mask filter. It turned out that there were many. It can be seen that the mask filter has a much better dust-proofing effect than the mask, and a good educational effect for the student can be obtained.

  After using the mask filter for a certain period of time, move the mask filter to the opening on the right side of cabinet 1 and manually move the two filter tightening and opening rods 56 to open the filter tightening block 54 and remove the mask filter. After inserting a new mask filter, the filter tightening and opening rod 56 can be loosened to further tighten the replaced mask filter.

  It should be understood that, as used herein, the term "comprising", "containing" or any other variation thereof is meant to encompass non-exclusive inclusion. Accordingly, a process, method, article or device that includes a series of elements not only includes those elements, but further includes other elements that are not explicitly enumerated, or of a process, method, article, or apparatus of this type. It also contains unique elements.

  Although the principles and modes of implementation of the present invention have been described herein using specific examples, the description of the above examples is only used to assist in understanding the method of the present invention and its basic principles. The above is only the preferred embodiment of the present invention. It should be noted that due to the limitation of character representation, there is an objectively infinite concrete structure, and for those skilled in the art, Some improvements, modifications or changes may be made without departing from the spirit of the invention, and the technical features described above may be combined in any suitable manner. Any improvement and modification, change or combination thereof, or any other application of the concept and technical solution of the invention directly without improvement should be regarded as the protection scope of the present invention.

1 cabinet
2 Partition plate
3 Communication port
4 Mask filter
8 Mask sealed taper sleeve
10 Ventilation stop block
11 Spray air pump
12 Material input opening cover
13 Contrast device
14 Filter tightening device
15 Dust movable motor
16 Dust catch movable screw
17 Dust pan movable block
19 Dust receiving bottom frame loading / unloading device
21 Dust receiving rotary motor
22 Dust pan
23 Dust pan contrast block
24 Dust receiving partition
25 breathing pump
26 Contrast cover
27 Mask
28 Mask lock cover
29 Dust catch bottom frame
30 Bottom frame insert rod
31 Bottom frame pinch
32 Bottom frame sandwich block
33 Bottom frame sandwich cylinder
34 Bottom frame sandwich lift cylinder
35 Pinching buffer cover
36 Pinching buffer spring
37 Pincer
38 Spring Connection Block
39 shock absorber connecting shaft
40 Buffer column fixed arc-shaped block
41 Position-fixed arc-shaped block movable circular groove
42 Position fixed arc block tightening rod
43 Cushion post fixed circular groove
45 Material input opening cover body
46 Material input opening handle
47 Cover body position fixing spring
48 Cover body position fixed insert block
51 Filter communication hole
52 Filter mounting block
53 Filter Tightening Spring
54 Filter tightening block
55 Filter Tightening Insert Rod
56 Filter tightening opening rod
401: Filter Pillar
402: Filter cover
403: Tightening compound hole

Claims (10)

The cabinet (1) includes a dust cavity which is sealed in the cabinet (1) through a partition plate (2), and a demo cavity which is open on the right side when viewed from the front, and a dust cavity is formed in the partition plate (2). A communication port (3) is provided to communicate the dust receiving movable motor (15) and the dust receiving movable screw (16) with each other at the upper part of the demo cavity. A dust receiving movable block (17) is mounted on and linked to the dust receiving movable block (17), and a dust receiving rotating motor (21) is installed below the dust receiving movable block (17). A dust receiving frame (22) is installed in the dust receiving frame, a dust receiving partition plate (24) is installed in the middle of the dust receiving frame (22), and a dust receiving partition plate (24) is installed at the bottom of the dust receiving frame (22). the place is located in the front view of both sides, Izu Also installed dust receiving comparing block (23), the mask filter (4) which communicates with the internal cavity in front view the left and right side plates of dust receiving frame (22) and the contrast device to operate parts of the mask (13), respectively A device for demonstrating the function of a comparable mask filter, wherein the mask filter (4) and the comparing device (13) are attached to each other and are connected to a communication port (3). A mask sealing taper sleeve (8) is fixedly mounted at the front end left end of the communication opening (3) on the left side when viewed from the front and small on the right side when viewed from the front. 2. The device according to claim 1, wherein the outer diameter of the filter cover is larger than the outer diameter of the left end of the cover of the filter when viewed from the front . 3.   In the dust cavity, ventilation stop blocks (10) are installed at positions above and below the communication port (3), and at the upper and lower parts of the dust cavity, a blow-off air pump that blows air toward the center. (11) is installed, and a material charging opening cover (12) is mounted on the side wall of the dust cavity between the two ventilation stop blocks (10), and the material charging opening cover (12) is installed. 12) includes a material charging / opening cover body (45) that is inserted into and linked to the side wall of the dust cavity, and a material charging / opening handle (46) is installed outside the material charging / opening cover body (45); Position fixing holes of the cover body which are oriented vertically are provided on the upper and lower sides of the material charging / opening cover body (45), and the position fixing holes of the cover body are covered with position fixing springs (47) of the cover body. body The position fixing insert block (48) is connected, and the side wall of the dust cavity is provided with a position fixing slot of the cover body which cooperates with the position fixing insert block (48) of the cover body. Demonstration device of mask filter action that can be compared. A filter communication hole (51) is provided on the left side plate of the dust receiving frame (22) when viewed from the front , and a filter communication device (14) is provided above and below the filter communication hole (51). The filter tightening device (14) includes a filter tightening mounting block (52) fixed to the outside of a side plate of the dust receiving frame (22), and the filter tightening mounting block (52) includes a filter. A filter tightening block (54) that is linked to a filter cover (402) via a filter tightening spring (53) is connected to one side facing the communication hole (51), and is connected to the filter tightening block (54). A filter tightening opening rod (56) with a handle is fixed on the outside, and the filter tightening opening rod (56) is penetrated by the filter tightening mounting block (52) and is linked. Claim 1 The ratio possible demonstration apparatus of the mask filter action. The outside of the filter communication hole (51) is a conical hole that is linked to the filter cover (402), and the inside is a cylindrical hole that matches the right end of the filter column (401) when viewed from the front , and the filter cover (402). And a filter tightening hole (403) is provided outside the filter tightening block (54), and a filter tightening insert rod (55) is provided inside the filter tightening block (54) in association with the tightening compound hole (403). 5. The device for demonstrating the function of a comparable mask filter according to claim 4. The contrast device includes a contrast cover (26) which is fitted and attached to the right side plate of the dust receiving frame (22) in a front view and is located on the same straight line as the filter column (401). The size of the opening in ()) matches the left end of the filter column (401), and the mask (27) is attached to the right end of the comparison cover (26) in a front view via a lock sleeve (28) of the mask. 3. A device according to claim 2, wherein a vent is provided at the center of the lock sleeve (28), the vent corresponding to the opening of the contrast cover (26). The dust receiving frame (22) has no bottom frame, and a dust receiving bottom frame (29) is linked below the dust receiving frame (22). The dust receiving frame (22) and the dust receiving partition plate (24) are attached to the dust bottom frame (29). ) And an insert rod (30) of a bottom frame which is inserted and linked so as to fit tightly with the dust receiving frame (29), is mounted on the dust receiving bottom frame (29). front view left and right sides to the bottom frame jaws (31) are provided, wherein said the front view of the demonstration cavity right bottom to the bottom frame jaws (31) and the bottom frame access device that links (19) are installed 2. The device for demonstrating the function of a comparable mask filter according to claim 1.   The dust receiving bottom frame loading / unloading device (19) includes a bottom frame holding / lifting cylinder (34) installed on a bottom frame of the cabinet (1), and the bottom frame holding / lifting cylinder (34) is oriented horizontally and horizontally. A sandwiching cylinder (33) is installed, and a bottom frame sandwiching block (32) connected to a bottom frame sandwiching opening (31) is connected to both left and right sides of the bottom frame sandwiching cylinder (33), and a bottom frame sandwiching block (32) The bottom part of the dust frame (29) is brought into contact with the upper part of the bottom frame holding cylinder (33) and is linked with the bottom frame holding hole (31) when the bottom part is inserted and linked with the bottom frame holding mouth (31). Demonstration device of the mask filter function that can be compared.   The cabinet (1) is provided with a pinch buffer cover (35) at a position below the bottom frame pinching cylinder (33), and a pinch buffer hole is provided in the pinch buffer cover (35). A pinch buffer spring (36) is installed in the hole, a pinch buffer column (37) is connected to the pinch buffer spring (36), and an upper portion of the pinch buffer column (37) is connected to a bottom frame pinch cylinder (33). 9. The device for demonstrating the function of a comparable mask filter according to claim 8, wherein:   A spring connection block (38) is installed on the upper part of the pinch buffer spring (36), the spring connection block (38) has an inverted T-shape, and a vertical portion is a trimming bolt, The thread of the connection block (38) of the spring is covered and linked to the lower part of the pinch buffer column (37), and the upper part of the pinch buffer column (37) is covered by the lower part of the bottom frame pinch cylinder (33). And a buffer column connecting shaft (39) is provided, and a buffer column position fixing circular groove (43) is provided in the middle of the buffer column connecting shaft (39). A position-fixed arc-shaped block movable groove (41) is provided, and a buffer column position-fixed arc-shaped block (40) associated with the buffer column position-fixed circular groove (43) is provided in the position-fixed arc-shaped block movable groove (41); Insert the buffer column (37) between the fixed arc-shaped blocks (40). 10. The device for demonstrating a comparable mask filter action according to claim 9, characterized in that a fixed-position, arc-shaped, movable clamping rod (42) is inserted and associated therewith so as to fit therewith.

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