CN117295303A - SMT backplate encapsulation box sealed from dust exhaust - Google Patents

Abstract

The invention discloses a self-dust-discharging sealed SMT backboard packaging box, which comprises a lower box body, wherein ventilation filter plates for ventilation and heat dissipation are arranged on the front side surface and the rear side surface of the lower box body in a slotted mode; an upper box body is arranged above the lower box body, a mounting plate is arranged in the lower box body, and an SMT backboard is arranged on the upper surface of the mounting plate; the SMT backboard comprises a front surface mounting technology and a rear surface mounting technology, wherein the left side and the right side of the SMT backboard are respectively provided with a pin; the two groups of self-dust-discharging assemblies are respectively arranged in the front side surface and the rear side surface of the lower box body and are used for treating impurity dust on the surface of the ventilation filter plate to realize automatic dust discharging. This SMT backplate packaging box sealed from dust exhaust is provided with the closing plate, and the closing plate sets up with the lateral wall laminating of lower box body, has improved the life of whole SMT backplate packaging box, can extrude sealed gasbag when the closing plate downwardly moving for gas in the sealed gasbag blows to ventilation filter through the blast pipe exhaust, consequently can blow off the dust of ventilation filter outside adhesion voluntarily, can remove dust automatically and arrange the dirt afterwards.

Description

A self-dusting and sealed SMT backplane packaging box

Technical field

The invention relates to the technical field of SMT backplane packaging, specifically a self-dust-removing and sealed SMT backplane packaging box.

Background technique

The SMT backplane is required for SMT chip processing. It is used to carry the motherboard of daughter boards or line boards. During the manufacturing process, the SMT backplane needs to be packaged and protected by a packaging box to prevent the SMT backplane from being damaged by external forces. , there are still some problems when using the existing SMT backplane packaging box, such as:

The patent number disclosed in the prior art is "CN217774884U" and is titled "A heat dissipation type packaging box". The heat generated by the operation of the electric heating plate is dissipated through the heat dissipation holes. When it is necessary to remove dust from the heat dissipation net at the heat dissipation holes, Pull the buckle, and the buckle is fixed in the installation groove through magnetic suction. After the buckle is pulled out from the inside of the installation groove, it drives the connecting rod to move. The connecting rod passes through the installation groove. When the moving block moves, the gear moves along the The tooth groove rotates, so that the cleaning wheel has the power to rotate. As the moving block continues to shift, the cleaning also matches the meshing rotation of the heat dissipation net, so that the dust on the inner wall of the heat dissipation net is continuously swept off, and the moving block moves the dust towards the The ash outlet is pushed forward, and after the cover is removed, the dust falls from the ash outlet;

In the above-mentioned prior art, the connecting rod is driven to move by pulling the buckle, so that the cleaning wheel has the power to rotate. With the continuous displacement of the moving block, the cleaning also fits the engagement and rotation of the heat dissipation net, so that the dust on the inner wall of the heat dissipation net is removed. are continuously swept off, so although dust can be discharged, the pull buckle needs to be pulled manually and dust cannot be discharged automatically. Moreover, when the packaging box is in use or not in use, outside air will always enter the packaging box through the heat dissipation net, thus making the packaging The sealing performance of the box is poor, which will allow dust from the outside to enter the packaging box, so it cannot be self-dusted and sealed well.

Contents of the invention

The purpose of the present invention is to provide a self-draining and sealed SMT backplane packaging box to solve the problem of the above-mentioned background technology currently on the market. By pulling the buckle, the connecting rod is driven to move, so that the cleaning wheel has the power to rotate. As it moves, The block is constantly shifting and the cleaning is also in line with the engagement and rotation of the heat dissipation net, so that the dust on the inner wall of the heat dissipation net is continuously swept off. Although the dust can be discharged in this way, the buckle needs to be pulled manually and the dust cannot be discharged automatically. Moreover, the packaging box is in When in use or not in use, the outside air will always enter the packaging box through the heat dissipation net, so the sealing performance of the packaging box is poor, and the dust from the outside will enter the packaging box, so the self-dusting seal cannot be good. The problem.

In order to achieve the above object, the present invention provides the following technical solution: a self-dusting and sealed SMT backplane packaging box, including a ventilation filter plate for ventilation and heat dissipation installed with slots on both front and rear sides of the lower box;

An upper box is installed above the lower box;

A mounting plate is provided inside the lower box, and an SMT backplane is installed on the upper surface of the mounting plate;

Wherein, the left and right sides of the SMT backplane are equipped with connecting pins;

Two sets of self-dusting components are respectively installed inside the front and rear sides of the lower box body, and are used to remove impurities and dust on the surface of the ventilation filter plate to achieve automatic dust removal;

The sealing assembly is installed on the inner walls of the front and rear sides of the lower box, and a ventilation filter plate is provided on the outside of the sealing assembly. The sealing assembly is used to seal one side of the ventilation filter plate.

Preferably, two lower accommodating grooves are symmetrically provided inside the bottom of the lower box body, and upper accommodating grooves are provided inside the left and right sides of the lower box body, and the space inside the lower accommodating groove and the upper accommodating groove are provided. The spaces inside the trough are all connected.

Through the arrangement of the above structure, the baffle can slide in the lower accommodating groove and the upper accommodating groove.

Preferably, a first groove with an inverted "U" shape is provided on both left and right sides of the upper box, and a sealing gasket with an inverted "U" shape is installed on the inner wall of the first groove, and the upper box is Two sets of pressure rods are symmetrically installed on the inner wall of the bottom surface of the box body. Each group is provided with two pressure rods, and the pressure rods are used to press down the installation plate.

Through the arrangement of the above structure, the pressure rod can control the lowering of the mounting plate.

Preferably, the self-dusting assembly includes sealing airbags installed on the inner walls of the front and rear sides of the lower box, and an "L"-shaped limiting plate is fixed on the outside of the sealing airbag, and one side of the sealing airbag is fixed. There is an exhaust pipe with a "Z" shape structure, and one end of the exhaust pipe penetrates the inside of the lower box body and corresponds to the ventilation filter plate, so that the exhaust pipe can blow the gas to the ventilation filter plate for self-exhaust dust.

Through the arrangement of the above structure, the exhaust pipe can blow the ventilation filter plate very well.

Preferably, the sealing assembly includes two sealing plates, and the two sealing plates are respectively attached to the inner walls of the front and rear sides of the lower box body, and a sealing air bag is provided below the sealing plate, and the width of the sealing plate is Less than the width of the limit plate.

Through the arrangement of the above structure, the sealing plate can squeeze the sealing airbag.

Preferably, a piston rod is fixed above the sealing plate, and a fixing sleeve made of copper is provided on the outside of the piston rod, and the two fixing sleeves are respectively fixed on the inner walls of the front and rear sides of the lower box body. Mercury is installed inside the fixed sleeve, and the mercury is arranged above the piston rod, and a connecting spring is nested below and outside the piston rod.

Through the arrangement of the above structure, the accumulated force of the connecting spring can automatically drive the piston rod to reset.

Preferably, the lower part of the installation plate is connected to the bottom surface of the lower box through a lifting adjustment assembly, and the lifting adjustment assembly includes four support adjustment rods, and the upper limit rod is fixedly installed in a groove on the bottom surface of the installation plate.

Through the arrangement of the above structure, the support adjustment rod can adjust the height of the installation plate.

Preferably, the upper and lower ends of the support adjustment rod are connected with moving blocks via movable axes, and the moving block above the support adjustment rod is slidingly connected to the upper limit rod, and a return spring is nested in the middle of the upper limit rod.

Through the arrangement of the above structure, the accumulated force of the return spring can automatically drive the moving block to move and reset.

Preferably, the left and right sides of the lower box are slidingly connected with baffles in an "L" shape, and an iron sliding block is installed on one end of the baffle close to the lower box, and the sliding block is connected to the upper container. The storage slot is slidingly connected, and a magnet block is fixed above the inside of the upper storage slot, and the magnet block and the sliding block are of different magnetic grades.

Through the arrangement of the above structure, it is convenient for the magnet block to absorb the sliding block, so as to fix the sliding block.

Preferably, a lower limit rod is installed in a slot on the inner wall of the bottom surface of the lower box body. The moving block below the support adjustment rod is slidingly connected to the lower limit rod, and the moving block is arranged in a "U" shape. A second groove arranged in a "U" shaped structure is provided on the upper left and right sides of the box body, and the second groove is used for placing the docking pins.

Through the setting of the above structure, it is easy to move the connecting pin upward and remove it later.

Compared with the existing technology, the beneficial effects of the present invention are: the self-dusting and sealed SMT backplane packaging box is equipped with a sealing plate, and the sealing plate is arranged in close contact with the side wall of the lower box body, so that the sealing plate is aligned with the lower box The body is sealed to prevent outside gas from entering the lower box through the ventilation filter plate. Therefore, when the lower box is not in use and does not need to dissipate heat, it can achieve a good sealing effect and prevent outside gas from entering through the ventilation filter plate. The lower box body causes damage, which increases the service life of the entire SMT backplane packaging box. At the same time, when the internal temperature of the SMT backplane packaging box is high during use, the mercury in the fixed sleeve will expand in volume when heated, causing The mercury in the fixed sleeve pushes the piston rod and the sealing airbag downward, so that the heat in the lower box can be discharged outward through the ventilation filter plate for heat dissipation, without affecting the heat dissipation effect. When the sealing plate moves downward, it will affect the sealing airbag. Squeeze, so that the gas in the sealed air bag is discharged through the exhaust pipe and blown to the ventilation filter plate, so the dust adhering to the outside of the ventilation filter plate can be automatically blown away, and then the dust can be automatically removed. The details are as follows:

A sealing plate is provided, and the sealing plate is placed in close contact with the side wall of the lower box body, so that the sealing plate seals the lower box body and prevents external gas from entering the lower box body through the ventilation filter plate, so that the lower box body is not used When there is no need for heat dissipation, it can achieve a good sealing effect, preventing external gas from entering the lower box through the ventilation filter plate and causing damage, which improves the service life of the entire SMT backplane packaging box. When the sealing plate moves downward, it will Squeeze the sealed airbag so that the gas in the sealed airbag is discharged through the exhaust pipe and blown to the ventilation filter plate, so the dust adhering to the outside of the ventilation filter plate can be automatically blown away, and then the dust can be automatically removed;

At the same time, when the internal temperature of the SMT backplane packaging box is high during use, the mercury in the fixed sleeve will expand in volume when heated, causing the mercury in the fixed sleeve to push the piston rod and sealing airbag downward, thereby causing the lower box to The heat in the body can be discharged outward through the ventilation filter plate for heat dissipation, without affecting the heat dissipation effect;

A support adjustment rod is installed. When the upper box body and the lower box body are separated, the support adjustment rod can automatically rotate from an inclined position to a vertical position through the force of the return spring, so that the support adjustment rod drives the installation plate upward from the lower box body. Move so that the height of the mounting plate is higher than the height of the lower box, thus making the space around the mounting plate larger, making it easier to install the SMT backplane on the mounting plate;

A baffle with an "L" shape structure is provided, so that when the entire packaging box is not in use, the baffle can be connected to the pins for shielding and protection. At the same time, when the packaging box is in use, the baffle can be moved downward and stored in the lower accommodation slot. .

Description of drawings

Figure 1 is a schematic diagram of the explosion structure of the present invention;

Figure 2 is a schematic structural view of the front view after assembly of the packaging box of the present invention;

Figure 3 is a schematic diagram of the main cross-sectional structure of the explosion of the present invention;

Figure 4 is a schematic diagram of the main cross-sectional structure of the packaging box of the present invention after assembly;

Figure 5 is an enlarged structural schematic diagram of position A in Figure 4 of the present invention;

Figure 6 is a schematic structural diagram of the lower box body of the present invention;

Figure 7 is a schematic side cross-sectional structural diagram of the lower box body of the present invention;

Figure 8 is an enlarged structural schematic diagram of position B in Figure 7 of the present invention;

Figure 9 is a schematic structural diagram of the mounting plate of the present invention looking upward after it is raised;

Figure 10 is an enlarged structural schematic diagram of position C in Figure 9 of the present invention;

Figure 11 is a schematic diagram of the structure of the present invention when the mounting plate is lowered and viewed from above;

Figure 12 is a schematic left cross-sectional structural view of the fixing sleeve of the present invention.

In the picture: 1. Lower box body; 101. Lower accommodation slot; 102. Upper accommodation slot; 103. Magnet block; 2. Ventilation filter plate; 3. Mounting plate; 31. Pin connection; 4. Upper box body ; 41. First groove; 42. Sealing gasket; 43. Pressure rod; 5. Second groove; 6. Support adjustment rod; 7. Fixed sleeve; 8. Limiting plate; 9. Sealing air bag; 10. Sealing plate; 11. Piston rod; 111. Connection spring; 12. Exhaust pipe; 13. Lower limit rod; 14. Moving block; 15. Upper limit rod; 151. Return spring; 16. Baffle; 161. Sliding block .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-12. The present invention provides a technical solution: a self-dusting and sealed SMT backplane packaging box, including a ventilation filter plate 2 installed with slots on the front and rear sides of the lower box 1 for ventilation and heat dissipation. ; An upper box 4 is installed above the lower box 1;

Move the entire SMT backplane packaging box into the working area. At this time, separate the upper box body 4 and the lower box body 1. At this time, as shown in Figure 11, the support adjustment rod 6 can be automatically driven by the force accumulated by the return spring 151. The upper moving block 14 slides outward on the outside of the upper limit rod 15, and the lower part of the installation plate 3 is connected to the bottom surface of the lower box 1 through a lifting adjustment assembly, and the lifting adjustment assembly includes four support adjustment rods 6, and The upper limit rod 15 is fixedly installed on the bottom surface of the mounting plate 3 through slotting. At the same time, the moving block 14 below the support adjustment rod 6 slides on the outside of the lower limit rod 13, so that the support adjustment rod 6 rotates from an inclined state to a vertical state, as shown in As shown in Figure 9, the support adjustment rod 6 pushes up the mounting plate 3, causing the mounting plate 3 to rise to a certain height. At this time, the lowest point of the mounting plate 3 is higher than the highest point of the lower box 1, thus making the installation The board 3 is exposed to the outside world, which makes the space outside the installation board 3 larger. Therefore, it is convenient to install the SMT backboard on the installation board 3. At the same time, the connecting pins 31 on both sides of the SMT backboard are made to correspond to the second groove 5. Installation After that, the upper box body 4 is covered on the lower box body 1, and then the pressure rod 43 and the upper box body 4 are lowered together. The left and right sides of the upper box body 4 are provided with first inverted "U" shaped structures. Groove 41, and the inner wall of the first groove 41 is equipped with a sealing gasket 42 with an inverted "U" shape structure, and two sets of pressure rods 43 are symmetrically installed on the inner wall of the bottom surface of the upper box body 4, each group is provided with two pressure rods. Rod 43, and the pressure rod 43 is used to press the mounting plate 3 downward, so that the pressure rod 43 presses the mounting plate 3 downward. At this time, the connecting pin 31 enters the corresponding second groove 5, and at the same time the first groove The groove 41 is stuck on the outside of the corresponding connecting pin 31. At this time, the sealing gasket 42 is squeezed, so that the sealing gasket 42 can well seal the periphery of the first groove 41 and the connecting pin 31;

When the pressure rod 43 presses the mounting plate 3 downward, as shown above, in the same way, with reference to Figures 6-7, 9 and 11, the mounting plate 3 is lowered and the support adjustment rod 6 is rotated. It is supported in an inclined shape, and the upper and lower ends of the support adjustment rod 6 are connected to the moving blocks 14 by movable axes, and the moving block 14 above the support adjustment rod 6 is slidingly connected to the upper limit rod 15, and the middle position of the upper limit rod 15 The nesting connection has a return spring 151. At this time, the return spring 151 begins to accumulate force, and then the upper box body 4 and the lower box body 1 are installed and fixed with screws, and then the packaging box composed of the lower box body 1 and the upper box body 4 is After the SMT backplane is well packaged, the entire packaging box can be used well. At this time, the sealing plate 10 and the inner wall of the lower box 1 are tightly fitted and sealed to prevent external gas from passing through the ventilation filter plate 2 And enter the lower box body 1, so as to perform a good sealing operation on the packaging box. The sealing assembly is fitted and installed on the inner walls of the front and rear sides of the lower box body 1, and a ventilation filter plate 2 is provided on the outside of the sealing assembly. The sealing assembly is used to seal one side of the ventilation filter plate 2. The sealing assembly includes two sealing plates 10, and the two sealing plates 10 are respectively attached to the inner walls of the front and rear sides of the lower box 1, and the sealing plates 10 are A sealing air bag 9 is provided below, and the width of the sealing plate 10 is smaller than the width of the limiting plate 8;

Referring to Figures 6-8 and 12, the internal electrical components of the entire packaging box will generate a certain amount of heat during use. At this time, the fixed sleeve 7 made of copper can conduct heat to the surrounding heat, so that the heat Entering the fixed sleeve 7, the mercury in the fixed sleeve 7 is heated and expands in volume, so that the mercury can push the piston rod 11 to move downward, and the piston rod 11 drives the sealing plate 10 to move downward. At this time, the internal heat can It is discharged outward through the ventilation filter plate 2, so as to effectively dissipate the heat of the packaging box. A piston rod 11 is fixed above the sealing plate 10, and a fixed sleeve 7 made of copper is provided on the outside of the piston rod 11, and Two fixed sleeves 7 are respectively fixed on the inner walls of the front and rear sides of the lower box body 1, and mercury is installed inside the fixed sleeves 7, and the mercury is arranged above the piston rod 11, and the lower outer side of the piston rod 11 is nested and connected. The spring 111 is connected, and at the same time, the sealing plate 10 squeezes the sealing air bag 9 when it moves downward, so that the gas inside the sealing air bag 9 is blown to the ventilation filter plate 2 through the exhaust pipe 12, so the outer surface of the ventilation filter plate 2 can be well Self-discharging dust facilitates the ventilation and heat dissipation work of the ventilation filter plate 2. Two sets of self-dusting components are respectively installed inside the front and rear sides of the lower box 1 to remove impurities and dust on the surface of the ventilation filter plate 2. , to realize automatic dust discharge. The self-dust discharge assembly includes sealing airbags 9 installed on the inner walls of the front and rear sides of the lower box 1, and a limit plate 8 with an "L" shape structure is fixed on the outside of the sealing airbag 9, and the sealing airbag 9 is An exhaust pipe 12 with a "Z" shape structure is fixed on one side, and one end of the exhaust pipe 12 penetrates the inside of the lower box 1 and corresponds to the ventilation filter plate 2, so that the exhaust pipe 12 can blow the gas to the ventilation filter plate 2 Carry out self-dusting;

After the heat is diffused outward in the later period, when the entire packaging box is not working, the piston rod 11 can be automatically driven to move upward through the connection spring 111 and the coldness of the mercury, and then the piston rod 11 drives the sealing plate 10 to move upward. The sealing plate 10 is closely attached to the inner wall of the lower box body 1, thereby preventing outside air from entering the lower box body 1 through the ventilation filter plate 2, and the packaging box can be well sealed to avoid being used when not in use. When the external air impurities enter the lower box 1 through the ventilation filter plate 2, the SMT backplane packaging box can be well self-dusted and sealed;

When the entire SMT backplane packaging box is transported when not in use, the baffle 16 can be slid outward in the lower receiving groove 101, and then the baffle 16 can be slid upward, and the left and right sides of the lower box 1 are slidably connected. There is a baffle 16 with an "L" shape structure, and an iron sliding block 161 is installed on one end of the baffle 16 close to the lower box body 1, and the sliding block 161 is slidingly connected with the upper accommodating groove 102, and the upper accommodating groove 102 is A magnet block 103 is fixed above the inside of the groove 102, and the magnet block 103 and the sliding block 161 are of different magnetic levels. At this time, the sliding block 161 and the magnet block 103, which are made of iron, are attracted to each other, thereby attracting the rising baffle. 16 is fixed, so that the baffle 16 can well shield and protect the docking pin 31, which facilitates the transportation of the SMT backplane packaging box and avoids damage to the protruding connecting pin 31. The bottom surface of the lower box body 1 A lower limit rod 13 is installed in a groove on the inner wall. The moving block 14 supporting the lower part of the adjusting rod 6 is slidingly connected to the lower limit rod 13. The moving block 14 is arranged in a "U" shape, and the upper left and right sides of the lower box 1 are A second groove 5 is provided in a "U" shape structure, and the second groove 5 is used for placing the docking pin 31;

A mounting plate 3 is provided inside the lower box 1, and an SMT backplate is installed on the upper surface of the mounting plate 3; wherein, the left and right sides of the SMT backplate are equipped with connecting pins 31, and the bottom of the lower box 1 is internally symmetrical Two lower accommodating grooves 101 are provided, and upper accommodating grooves 102 are provided inside the left and right sides of the lower box 1, and the space inside the lower accommodating groove 101 and the space inside the upper accommodating groove 102 are connected. , thereby completing a series of tasks.

In the description of the present invention, unless otherwise stated, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Any indication or implication that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation should not be construed as a limitation on the invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. An SMT backboard packaging box sealed by self dust exhaust comprises a lower box body (1), wherein ventilation filter plates (2) for ventilation and heat dissipation are arranged on the front side surface and the rear side surface of the lower box body in a slotting mode;

an upper box body (4) is arranged above the lower box body (1);

characterized by further comprising:

a mounting plate (3) is arranged in the lower box body (1), and an SMT backboard is mounted on the upper surface of the mounting plate (3);

wherein, the left side and the right side of the SMT backboard are provided with connecting pins (31);

the two groups of self-dust-discharging assemblies are respectively arranged in the front side surface and the rear side surface of the lower box body (1) and are used for treating impurity dust on the surface of the ventilation filter plate (2) so as to realize automatic dust discharging;

and the sealing assembly is attached to the inner walls of the front side surface and the rear side surface of the lower box body (1), and the ventilation filter plate (2) is correspondingly arranged on the outer side of the sealing assembly, and is used for sealing one side of the ventilation filter plate (2).

2. The self dust-exhausting sealed SMT back board packaging box according to claim 1, wherein: two lower holding grooves (101) are symmetrically formed in the bottom of the lower box body (1), an upper holding groove (102) is formed in the left side surface and the right side surface of the lower box body (1), and the space in the lower holding groove (101) is communicated with the space in the upper holding groove (102).

3. The self dust-exhausting sealed SMT back board packaging box according to claim 1, wherein: the left and right sides of last box body (4) all has seted up first recess (41) that are the structure of inversion "U" shape, and sealed pad (42) that are the structure of inversion "U" shape are installed to the inner wall of first recess (41) to two sets of depression bars (43) are installed to the bottom surface inner wall symmetry of last box body (4), and every group is provided with two depression bars (43), and depression bar (43) are used for pressing down mounting panel (3).

4. The self dust-exhausting sealed SMT back board packaging box according to claim 1, wherein: the self-dust-discharging assembly comprises a sealing air bag (9) arranged on the inner walls of the front side and the rear side of the lower box body (1), a limiting plate (8) with an L-shaped structure is fixed on the outer side of the sealing air bag (9), an exhaust pipe (12) with a Z-shaped structure is fixed on one side of the sealing air bag (9), one end of the exhaust pipe (12) penetrates through the inner part of the lower box body (1) to correspond to the ventilation filter plate (2), and the exhaust pipe (12) is convenient to blow gas to the ventilation filter plate (2) to perform self-dust discharging.

5. The self dust sealed SMT back board enclosure as defined in claim 4, wherein: the sealing assembly comprises two sealing plates (10), the two sealing plates (10) are respectively attached to the inner walls of the front side surface and the rear side surface of the lower box body (1), sealing air bags (9) are correspondingly arranged below the sealing plates (10), and the width of the sealing plates (10) is smaller than that of the limiting plates (8).

6. The self dust sealed SMT back board enclosure as defined in claim 5, wherein: the top of closing plate (10) is fixed with piston rod (11), and the outside laminating of piston rod (11) is provided with fixed sleeve (7) of copper material to two fixed sleeve (7) are fixed respectively the front and back both sides face inner wall of lower box body (1), and the internally mounted of fixed sleeve (7) has mercury, and mercury sets up the top at piston rod (11), and the below outside nested connection of piston rod (11) has connecting spring (111).

7. The self dust-exhausting sealed SMT back board packaging box according to claim 1, wherein: the lower part of the mounting plate (3) is connected with the upper surface of the bottom surface of the lower box body (1) through a lifting adjusting component, the lifting adjusting component comprises four supporting adjusting rods (6), and an upper limiting rod (15) is fixedly arranged on the bottom surface of the mounting plate (3) in a grooving mode.

8. The self dust sealed SMT back board enclosure as defined in claim 7, wherein: the upper end and the lower end of the support adjusting rod (6) are both connected with moving blocks (14) through movable shafts, the moving blocks (14) above the support adjusting rod (6) are connected with an upper limit rod (15) in a penetrating sliding manner, and a reset spring (151) is connected to the middle position of the upper limit rod (15) in a nested manner.

9. The self dust-exhausting sealed SMT back board packaging box according to claim 2, wherein: the left and right sides of lower box body (1) all sliding connection has baffle (16) that are "L" shape structure, and the sliding block (161) of iron material is installed to the one end that is close to of lower box body (1) of baffle (16) to sliding block (161) and last storage tank (102) sliding connection, and the inside top of going up storage tank (102) is fixed with magnet piece (103), and magnet piece (103) are the synonym magnetic grade with sliding block (161).

10. The self dust sealed SMT back board enclosure as defined in claim 8, wherein: lower gag lever post (13) are installed to the bottom surface inner wall fluting of lower box body (1), movable block (14) and lower gag lever post (13) of supporting regulation pole (6) below run through sliding connection, and movable block (14) are "U" shape structure setting, second recess (5) that are "U" shape structure setting are all offered to the left and right sides top of lower box body (1), and second recess (5) are used for placing butt joint pin (31).