Normally closed conduction device, air exhaust assembly and tobacco shred box

Abstract

The invention discloses a normally-closed conduction device, an air exhaust assembly and a tobacco shred box, the normally-closed conduction device comprises a bottom plate, a telescopic column, an outer sleeve, a driving piece, an elastic piece, an inner sleeve and a transverse moving block, by driving the telescopic column to retract, an air outlet through hole in the side of the inner sleeve can communicate with the interior of the tobacco shred box, and at the moment, air exhaust of the interior of the tobacco shred box can be achieved conveniently. According to the cut tobacco box, conduction is conveniently achieved when air in the cut tobacco box is exhausted, so that part of air in the cut tobacco box is exhausted, the cut tobacco box can be isolated from the outside through the conduction device, the problem of condensation of the inner wall of the cut tobacco box can be greatly solved, the interior of the cut tobacco box is kept dry, and the quality of cut tobacco in the cut tobacco box is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco storage devices, and in particular to a normally closed conduction device, an exhaust assembly, and a tobacco box. Background Art

[0002] When tobacco is put into the tobacco box, it is usually not full, and there is a certain amount of air inside. When the tobacco put into the tobacco box through the packing station has a certain temperature when it first enters the tobacco box, and there is moisture in the air inside the tobacco box, when the hot and humid air in the packed tobacco box acts on the inner wall of the tobacco box and cools down, condensation will form on the inner wall of the tobacco box. In the existing tobacco packaging, the box cover is directly closed after the tobacco is put in to seal the box. After the box is sealed, there is no channel to realize the exhaust treatment inside the tobacco box, so that the hot and humid air in the tobacco box will form condensation on the inner wall of the tobacco box, affecting the quality of the tobacco. Summary of the invention

[0003] In view of the above shortcomings, the present invention provides a normally closed conduction device, an exhaust assembly, and a tobacco box, which can facilitate and assist in exhausting the tobacco box to alleviate the problem of condensation on the inner wall of the tobacco box.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] In a first aspect, the present invention provides a normally closed conduction device, comprising a base plate, a telescopic column, an outer sleeve, a driving member, an elastic member, an inner sleeve and a transverse movement block;

[0006] The outer sleeve and the inner sleeve are fixedly mounted on the bottom plate, and the inner sleeve passes through the bottom plate; the upper part of the inner sleeve is provided with limiting grooves penetrating through the two sides of the inner sleeve on the opposite side walls;

[0007] The outer sleeve is located outside the inner sleeve and a sealing ring is provided between the outer sleeve and the inner sleeve at the bottom to form an air outlet cavity at the bottom. The outer sleeve and the inner sleeve are respectively provided with air outlet holes penetrating the side walls corresponding to the air outlet cavity.

[0008] The telescopic column is sleeved in the inner sleeve and can slide axially along the inner sleeve, and an oblique groove penetrating through two sides of the telescopic column is provided on the telescopic column;

[0009] The middle part of the transverse movement block is provided with a transverse movement middle part matching the inclined groove and transverse movement ends located at both ends of the transverse movement middle part, and the upper and lower end surfaces of the transverse movement middle part and the transverse movement end parts are respectively located on the same horizontal plane, and are respectively flush with the upper and lower groove walls of the limit groove; the end surfaces of the two transverse movement ends that are away from each other are inclined surfaces, and the two inclined surfaces are parallel to each other;

[0010] The driving member is slidably sleeved in the outer sleeve, and wedges are arranged at opposite positions on the inner wall of the driving member, and two wedges are respectively provided with inclined surfaces, which are in one-to-one correspondence with the inclined surfaces of the two transverse end portions;

[0011] The elastic member is located between the telescopic column and the driving member.

[0012] Furthermore, the end surface of the telescopic column close to the bottom plate is flush with the bottom surface of the bottom plate, and when the telescopic column slides in the direction away from the bottom plate, the end of the telescopic column close to the bottom plate is staggered with the air outlet hole on the side wall of the inner sleeve to allow the inner sleeve to communicate with the air outlet cavity.

[0013] Furthermore, the air outlet holes are evenly distributed on the side wall of the outer sleeve or the inner sleeve around the circumference.

[0014] Further, the driving member is a cylindrical structure sealed at the end away from the bottom plate;

[0015] The outer sleeve is provided with a limiting ring extending toward the center of the end at the end away from the base plate, the inner diameter of the limiting ring is smaller than the outer diameter of the driving member, and under the action of the elastic member, the end of the driving member away from the base plate abuts against the limiting ring.

[0016] Furthermore, it also includes an air guide sleeve, which is fixedly mounted on the bottom plate and located outside the outer sleeve, and an air outlet channel connected to the air outlet cavity is formed between the air guide sleeve and the outer sleeve.

[0017] Furthermore, a sealing ring is provided on the inner wall of the end portion of the inner sleeve close to the bottom plate.

[0018] Further, when the end surface of the telescopic column close to the bottom plate is flush with the bottom surface of the bottom plate, one of the transverse end portions abuts against the telescopic column to limit the telescopic column from continuing to move toward the bottom plate.

[0019] On the other hand, the present invention also provides a vacuum extraction component, including a vacuum extraction head and also including any of the above-mentioned conducting devices, the vacuum extraction head including an abutment member, and a vacuum extraction channel formed in the vacuum extraction head, so that when the abutment member presses the driving member, the vacuum extraction head is located outside the outer sleeve and the vacuum extraction channel is connected to the end of the inner sleeve close to the bottom plate.

[0020] Furthermore, the vacuum head includes a sealing cover, which is located at the periphery of the abutment member and can be covered on the conduction device.

[0021] In another aspect, the present invention further provides a tobacco box, comprising any one of the conduction devices described above.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the normally closed conduction device, the exhaust assembly, and the tobacco box provided by the present invention are used to solve the problem of difficulty in exhausting air from the tobacco box. Through the normally closed conduction device, it is convenient to achieve conduction when exhausting air inside the tobacco box to achieve partial extraction of air from the tobacco box. After the exhaust is completed, the tobacco box can be isolated from the outside world through the normally closed conduction device, and the outside air cannot enter the tobacco box, so that most of the air in the tobacco box is extracted and has a certain degree of vacuum. Since most of the air is extracted, the problem of condensation on the inner wall of the tobacco box can be greatly alleviated, and condensation inside the tobacco box can be reduced as much as possible or even completely avoided, so as to keep the inside of the tobacco box dry and ensure the quality of tobacco in the tobacco box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0024] Figure 1 It is a schematic structural diagram of the conduction device of the present invention;

[0025] Figure 2 is a cross-sectional schematic diagram of a conducting device of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the bottom plate, the outer sleeve and the inner sleeve of the present invention;

[0027] Figure 4 is a cross-sectional schematic diagram of a driving member in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the telescopic column in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the transverse movement block in the present invention;

[0030] Figure 7 It is a schematic diagram of the implementation of the conduction device in the present invention (the air extraction head is not inserted);

[0031] Figure 8 It is a schematic diagram of the implementation of the conduction device in the present invention (the vacuum head is inserted);

[0032] Fig. 9 It is a cross-sectional view of the implementation of the conduction device in the present invention (with the vacuum head inserted);

[0033] Fig.10 It is a structural schematic diagram of the air extraction component of the present invention;

[0034] Fig.11 It is a structural schematic diagram of an exemplary air extraction head in the present invention;

[0035] Fig.12 It is a structural schematic diagram of another example of an air extraction component in the present invention (with the air extraction head inserted);

[0036] Fig.13 A cross-sectional schematic diagram of another example of an air extraction head in the present invention;

[0037] Fig.14 It is a cross-sectional view of another exemplary vacuum assembly of the present invention (vacuum head inserted);

[0038] Fig.15 It is a schematic structural diagram of the tobacco box of the present invention.

[0039] Among them, the markings shown in the figure are: 10-bottom plate; 11-telescopic column; 12-outer sleeve; 121-limiting ring; 13-driving member; 131-wedge block; 14-elastic member; 15-inner sleeve; 151-limiting groove; 16-transverse block; 161-transverse middle part; 162-transverse end; 17-air guide sleeve; 18-bevel groove; 19-sealing ring; 110-air outlet cavity; 111-air outlet hole; 112-air outlet channel; 20-exhaust head; 21-abutment member; 22-exhaust channel; 23-sealing cover; 80-conduction device; 100-tobacco box; 101-box body; 102-box cover. DETAILED DESCRIPTION

[0040] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] The first embodiment of the present invention provides a normally closed conduction device for exhausting air from a tobacco box. The normally closed conduction device is installed on the tobacco box, and is preferably installed on the box cover of the tobacco box. When the tobacco box is sealed, the conduction device is used to connect with the outside to exhaust air from the inside of the tobacco box. After the exhaust is completed, the airflow channel in the conduction device is cut off and closed. At this time, outside air cannot enter the tobacco box, so that most of the air in the tobacco box is exhausted and has a certain degree of vacuum.

[0044] Please refer to Figures 1 to 6 The normally closed conduction device includes a base plate 10 , a telescopic column 11 , an outer sleeve 12 , a driving member 13 , an elastic member 14 , an inner sleeve 15 and a transverse movement block 16 .

[0045] The bottom plate 10 is fixedly mounted on the box cover during implementation. Specifically, the box cover is provided with a through slot to accommodate the normally closed conduction device. The bottom plate 10 is mounted on the box cover by bolts and is flush with the inner wall of the box cover, and the outer sleeve 12 is placed outward.

[0046] The outer sleeve 12 and the inner sleeve 15 are fixedly mounted on the bottom plate 10. Preferably, the outer sleeve 12 and the inner sleeve 15 can be integrally formed with the bottom plate 10. The inner sleeve 15 passes through the bottom plate 10, and the inward end of the inner sleeve 15 can be connected to the inside of the tobacco box and can become a part of the airflow channel. The upper part of the inner sleeve 15 is provided with a limiting groove 151 that passes through both sides of the inner sleeve 15 on the opposite side walls. The upper and lower groove walls of the limiting grooves 151 on both sides are flush with each other. The orientation of the upper and lower groove walls here corresponds to the orientation of the axial extension direction of the inner sleeve 15, such as the upper groove wall corresponds to the groove wall in the direction of the outer end of the inner sleeve 15, and the lower groove wall corresponds to the groove wall in the direction of the inner end of the inner sleeve 15.

[0047] The outer sleeve 12 and the inner sleeve 15 are both cylindrical structures. The outer sleeve 12 is located at the outer periphery of the inner sleeve 15 and is coaxially arranged. A sealing ring 19 is arranged between the outer sleeve 12 and the inner sleeve 15 at the bottom. The inner ring of the sealing ring 19 is tightly connected to the outer wall of the inner sleeve 15, and the outer ring is tightly connected to the inner wall of the outer sleeve 12 to form an air outlet cavity 110 at the bottom. The air outlet cavity 110 is between the sealing ring 19, the bottom plate 10, the outer sleeve 12 and the inner sleeve 15. The outer sleeve 12 and the inner sleeve 15 are respectively provided with air outlet holes 111 penetrating the side walls corresponding to the air outlet cavity 110. When the air outlet holes 111 are connected, air can enter the air outlet cavity 110 through the air outlet holes 111 on the side of the inner sleeve 15, and then go out through the air outlet holes 111 on the side of the outer sleeve 12. The air outlet holes 111 are evenly distributed on the side wall of the outer sleeve 12 or the inner sleeve 15 around the circumference, so that when the air outlet holes 111 are connected, a larger connection channel can be realized to achieve faster air extraction.

[0048] The telescopic column 11 is matched with the inner sleeve 15 and can slide axially along the inner sleeve 15. The outer diameter of the telescopic column 11 is as consistent as possible with the inner diameter of the inner sleeve 15, so that when the telescopic column 11 is located in the inner sleeve 15, air cannot pass through the gap between the telescopic column 11 and the inner sleeve 15. The telescopic column 11 is provided with an inclined groove 18 that runs through both sides of the telescopic column 11, and the cross section of the inclined groove 18 is square. In order to ensure air tightness, a sealing ring is provided at the inner wall of the end of the inner sleeve 15 close to the bottom plate 10. At this time, when the end of the telescopic column 11 is located at the end position of the inner sleeve 15 close to the bottom plate 10, it interacts with the sealing ring to ensure good air tightness and prevent gas from entering and exiting. It can be understood that the provision of a sealing ring and other structures cannot affect the sliding of the telescopic column 11 in the inner sleeve 15.

[0049] The middle part of the transverse block 16 is provided with a transverse middle part 161 matching the inclined slot 18 and transverse end parts 162 located at both ends of the transverse middle part 161. The upper and lower end surfaces of the transverse middle part 161 and the transverse end parts 162 are respectively located on the same horizontal plane and are respectively flush with the upper and lower groove walls of the position-limiting through slot 151. That is, the upper end surfaces of the transverse middle part 161 and the transverse end parts 162 are respectively located on the same horizontal plane, and the lower end surfaces of the transverse middle part 161 and the transverse end parts 162 are respectively located on the same horizontal plane and are respectively flush with the upper and lower groove walls of the position-limiting through slot 151. The end surfaces of the two transverse end parts 162 that are away from each other are inclined surfaces, and the two inclined surfaces are parallel to each other, and the inclined surface of the transverse end part 162 of the inclined slot 18 near the higher position is in a form of gradually tilting outward from near the middle part to away from the middle part.

[0050] The driving member 13 is slidably sleeved in the outer sleeve 12, and the outer diameter of the driving member 13 is equal to the inner diameter of the outer sleeve 12. In a preferred embodiment, a slide rail (not shown in the figure) is provided between the driving member 13 and the outer sleeve 12, so that the driving member 13 and the outer sleeve 12 can only slide axially with each other without rotating. Wedge blocks 131 are provided at opposite positions on the inner wall of the driving member 13, and two wedge blocks 131 are respectively provided with inclined surfaces, which are in one-to-one correspondence with the inclined surfaces of the two transverse end portions 162.

[0051] The elastic member 14 is located between the telescopic column 11 and the driving member 13. The elastic member 14 is preferably a compression spring. The elastic member 14 has sufficient reset strength to ensure that reset can be achieved.

[0052] In a preferred embodiment, the end surface of the telescopic column 11 close to the base plate 10 is flush with the bottom surface of the base plate 10, and when the telescopic column 11 slides in a direction away from the base plate 10, the end of the telescopic column 11 close to the base plate 10 is staggered with the air outlet hole 111 on the side wall of the inner sleeve 15, so that the inner sleeve 15 is connected to the air outlet cavity 110.

[0053] Preferably, the normally closed conduction device further includes an air guide sleeve 17, which is fixedly mounted on the bottom plate 10 and located outside the outer sleeve 12. An air outlet passage 112 communicating with the air outlet cavity 110 is formed between the air guide sleeve 17 and the outer sleeve 12, and air can enter the air outlet passage 112 and then exit through the air outlet cavity 110. Sealing rings are respectively provided on the inner wall of the air guide sleeve 17 and the outer wall of the outer sleeve 12, so that when the air extraction head is inserted, they can cooperate with the air extraction head to abut against the air extraction head to form a relatively dense chamber.

[0054] The driving member 13 is a cylindrical structure sealed at the end away from the bottom plate 10. The outer sleeve 12 is provided with a limit ring 121 extending toward the center of the end at the end away from the bottom plate 10. The inner diameter of the limit ring 121 is smaller than the outer diameter of the driving member 13. Under the action of the elastic member 14, the end of the driving member 13 away from the bottom plate 10 abuts against the limit ring 121. By providing the limit ring 121, on the one hand, the driving member 13 can be limited to limit its outward movement. On the other hand, a protection can be achieved through the limit ring 121. The driving member 13 can only be applied with force through the inner ring of the limit ring 121. The external force acts on the outer sleeve 12 and the limit ring 121 and cannot press the driving member 13, thereby avoiding accidental touch. In this embodiment, a protruding mechanism can be provided at a corresponding position on an external device, such as an exhaust head, so that it can pass through the limiting ring 121 and act on the pressing member 143, so as to press the driving member 13 and retract the telescopic column 11.

[0055] In this exemplary embodiment, when the end surface of the telescopic column 11 close to the bottom plate 10 is flush with the bottom surface of the bottom plate 10, one of the transverse end portions 162 abuts against the telescopic column 11 to limit the telescopic column 11 from continuing to move toward the bottom plate 10. At this time, the telescopic column 11 will not extend out of the bottom plate 10, so as to avoid hindering the cleaning of the tobacco box. Moreover, since the tobacco box is under negative pressure after vacuuming, the telescopic column 11 is kept inwardly inclined but is limited, so as to ensure the sealing effect.

[0056] The following is a specific implementation of this exemplary embodiment, which can be referred to Figures 7 to 9 During implementation, the normally closed conduction device is installed on the tobacco box, the bottom plate 10 is located on the inner side of the box cover, the air guide sleeve 17 and the outer sleeve 12 slightly protrude from the outer side of the box cover, and the air extraction head 20 is driven by an external device (such as a robot) and presses against the conduction device. At this time, the abutment member 21 on the air extraction head 20 presses the driving member 13 inward, and the air extraction head 20 is gradually inserted into the air outlet channel 112 and is tightly attached to both sides of the air outlet channel 112. At this time, the air extraction channel 22 on the air extraction head 20 and the air outlet channel 112 guide The abutment member 21 drives the driving member 13 to continuously move inwards and drive the two wedge blocks 131 to move inwards. The two wedge blocks 131 act on the inclined surfaces of the corresponding two transverse end portions 162. At this time, under the limiting action of the limiting through grooves 151 on both sides of the inner sleeve 15, the transverse block 16 can only move transversely. During the transverse movement of the transverse block 16, under the action of the transverse middle portion 161 and the inclined groove 18 of the telescopic column 11, the telescopic column 11 is driven to move outwards, that is, the telescopic column 11 is close to the telescopic column 11. The end of the bottom plate 10 is retracted toward the inner sleeve 15 and presses the elastic member 14, and the driving member 13 is continuously pressed, and the telescopic column 11 is continuously retracted until the end surface of the telescopic column 11 exceeds the air outlet hole 111 of the inner sleeve 15. At this time, as shown in Figure 9, the air outlet hole 111 on the side of the inner sleeve 15 can be connected to the inside of the tobacco box, so that the inside of the tobacco box, the air outlet hole 111 of the inner sleeve 15, the air outlet cavity 110, the air outlet hole 111 on the side of the outer sleeve 12, and the air outlet channel 112 form a The air flow channel is connected to the exhaust channel 22 on the exhaust head 20. At this time, the exhaust head 20 is exhausted by an external device, and part of the air in the tobacco box is extracted in this way; after part of the gas is extracted, the exhaust head 20 is slowly extracted, and the exhaust can be continued during the extraction process. The telescopic column 11 moves toward the inside of the tobacco box under the action of the elastic member 14 and finally blocks the port of the inner sleeve 15, and at the same time blocks the air outlet hole 111 on the side of the inner sleeve 15. Figure 2 At this time, the tobacco box is isolated from the outside world, and the outside air cannot enter the tobacco box, so that most of the air in the tobacco box is extracted and has a certain degree of vacuum. Since most of the air is extracted, the problem of condensation on the inner wall of the tobacco box can be greatly alleviated, and the condensation inside the tobacco box can be reduced as much as possible or even completely avoided, keeping the inside of the tobacco box dry, and ensuring the quality of tobacco in the tobacco box.

[0057] A second embodiment of the present invention provides an air extraction assembly, referring to Figures 1 to 11 , includes an exhaust head 20 and the conducting device of the above embodiment, the exhaust head 20 includes an abutment member 21, and an exhaust channel 22 is formed in the exhaust head 20, so that when the abutment member 21 presses the driving member 13, the exhaust head 20 is located outside the outer sleeve 12 and the exhaust channel 22 is connected to the end of the inner sleeve 15 close to the base plate 10. During implementation, the exhaust head 20 can be installed on a driving mechanism such as a robot arm, and connected to an external negative pressure device to provide exhaust power to achieve exhaust. The exhaust head 20 drives the abutment part 21 to enter the conduction device to press the driving part 13, thereby driving the telescopic column 11 to continuously retract until the end face of the telescopic column 11 exceeds the air outlet hole 111 of the inner sleeve 15, so that the inside of the tobacco box, the air outlet hole 111 of the inner sleeve 15, the air outlet cavity 110, the air outlet hole 111 on the side of the outer sleeve 12, and the air outlet channel 112 can form an air flow channel and be connected with the exhaust channel 22 on the exhaust head 20, thereby helping to achieve exhaust inside the tobacco box.

[0058] In this exemplary embodiment, the exhaust head 20 is an overall cylindrical structure with an open lower end. The side wall can be inserted into the air outlet channel 112, and the exhaust channel 22 extends from the lower end to the top, so that it can be connected to the air outlet channel 112 when inserted to facilitate exhaust.

[0059] In another implementation, reference may be made to Figure 12 to Figure 14 The exhaust head 20 includes a sealing cover 23, which is located on the periphery of the abutment 21 and can be covered on the conduction device. During implementation, when the abutment 21 is driven by the exhaust head 20 to enter the conduction device to press the driving member 13, the telescopic column 11 is retracted, and the inside of the tobacco box, the air outlet hole 111 of the inner sleeve 15, the air outlet cavity 110, the air outlet hole 111 on the side of the outer sleeve 12, and the air outlet channel 112 form an air flow channel and are connected with the exhaust channel 22 on the exhaust head 20. The end of the sealing cover 23 can abut the box cover of the tobacco box. At this time, a relatively dense space can be formed inside the sealing cover 23, and air is exhausted through the exhaust channel 22 of the exhaust head 20, so that the inside of the tobacco box can be exhausted.

[0060] The third embodiment of the present invention, referring to Figures 1 to 6 as well as Fig.15, a tobacco box is provided, the tobacco box 100 includes the conduction device 80 of the above embodiment, and the conduction device 80 is arranged on the tobacco box 100 to facilitate the exhaust of the inside of the tobacco box 100. The tobacco box 100 includes a box body 101 and a box cover 102, and the conduction device 80 is installed on the box cover 102. After the box body 101 is loaded with tobacco, the box cover 102 is covered on the box body 101 and the tobacco box 100 is formed into a closed space as much as possible to avoid gas from entering and exiting and contaminating the tobacco. At the same time, in order to avoid or reduce condensation inside the tobacco box, one way is to vacuum the inside of the tobacco box, that is, to extract part of the air. The tobacco box of the present invention is equipped with a conduction device, which can facilitate the partial extraction of air in the tobacco box. After part of the gas is extracted, the conduction port and other channels can be blocked. At this time, the tobacco box is isolated from the outside world, and the outside air cannot enter the tobacco box, so that most of the air in the tobacco box is extracted and has a certain vacuum degree. Since most of the air is extracted, the problem of condensation on the inner wall of the tobacco box can be greatly alleviated, and the condensation inside the tobacco box can be reduced as much as possible or even completely avoided, so as to keep the inside of the tobacco box dry and ensure the quality of tobacco in the tobacco box.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A normally closed conduction device, characterized in that: It comprises a base plate (10), a telescopic column (11), an outer sleeve (12), a driving member (13), an elastic member (14), an inner sleeve (15) and a transverse movement block (16); The outer sleeve (12) and the inner sleeve (15) are fixedly mounted on the bottom plate (10), and the inner sleeve (15) passes through the bottom plate (10); the upper portion of the inner sleeve (15) is provided with limiting grooves (151) on opposite side walls that pass through both sides of the inner sleeve (15); The outer sleeve (12) is located outside the inner sleeve (15), and a sealing ring (19) is provided between the bottoms of the outer sleeve (12) and the inner sleeve (15) to form an air outlet cavity (110) at the bottoms. The outer sleeve (12) and the inner sleeve (15) are respectively provided with air outlet holes (111) penetrating the side walls at the side walls corresponding to the air outlet cavity (110); The telescopic column (11) is sleeved in the inner sleeve (15) and can slide axially along the inner sleeve (15); the telescopic column (11) is provided with an inclined groove (18) penetrating through two sides of the telescopic column (11); The middle part of the transverse block (16) is provided with a transverse middle part (161) matching the inclined groove (18) and transverse end parts (162) located at both ends of the transverse middle part (161); the upper and lower end surfaces of the transverse middle part (161) and the transverse end parts (162) are respectively located on the same horizontal plane and are respectively flush with the upper and lower groove walls of the limiting through groove (151); the end surfaces of the two transverse end parts (162) that are away from each other are inclined surfaces, and the two inclined surfaces are parallel to each other; The driving member (13) is slidably sleeved in the outer sleeve (12), and wedge blocks (131) are arranged at opposite positions on the inner wall of the driving member (13), and two wedge blocks (131) are respectively provided with inclined surfaces, which correspond one to one with the inclined surfaces of the two transverse end portions (162); The elastic member (14) is located between the telescopic column (11) and the driving member (13).

2. The normally closed conduction device according to claim 1, characterized in that: The end surface of the telescopic column (11) close to the bottom plate (10) is flush with the bottom surface of the bottom plate (10), and when the telescopic column (11) slides in a direction away from the bottom plate (10), the end of the telescopic column (11) close to the bottom plate (10) is staggered with the air outlet hole (111) on the side wall of the inner sleeve (15), so that the inner sleeve (15) and the air outlet cavity (110) are connected.

3. The normally closed conduction device according to claim 1, characterized in that: The air outlet holes (111) are evenly distributed on the side wall of the outer sleeve (12) or the inner sleeve (15) in a circumferential direction.

4. The normally closed conduction device according to claim 1, characterized in that: The driving member (13) is a cylindrical structure sealed at the end away from the bottom plate (10); The outer sleeve (12) is provided with a limiting ring (121) extending toward the center of the end portion away from the base plate (10); the inner diameter of the limiting ring (121) is smaller than the outer diameter of the driving member (13); and under the action of the elastic member (14), the end portion of the driving member (13) away from the base plate (10) abuts against the limiting ring (121).

5. The normally closed conduction device according to claim 1, characterized in that: It also includes an air guide sleeve (17), which is fixedly mounted on the bottom plate (10) and is located outside the outer sleeve (12), and an air outlet channel (112) communicating with the air outlet cavity (110) is formed between the air guide sleeve (17) and the outer sleeve (12).

6. The normally closed conduction device according to claim 1, characterized in that: A sealing ring is provided at the inner wall of the end of the inner sleeve (15) close to the bottom plate (10).

7. The normally closed conduction device according to claim 2, characterized in that: When the end surface of the telescopic column (11) close to the bottom plate (10) is flush with the bottom surface of the bottom plate (10), one of the transverse end portions (162) abuts against the telescopic column (11) to limit the telescopic column (11) from continuing to move toward the bottom plate (10).

8. A vacuum assembly, comprising a vacuum head (20), characterized in that: It also includes the conduction device according to any one of claims 1 to 7, the vacuum head (20) includes an abutment member (21), and an exhaust channel (22) is formed in the vacuum head (20), so that when the abutment member (21) presses the driving member (13), the vacuum head (20) is located outside the outer sleeve (12) and the exhaust channel (22) is connected to the end of the inner sleeve (15) close to the base plate (10).

9. The air extraction assembly according to claim 8, characterized in that: The vacuum head (20) comprises a sealing cover (23), which is located at the periphery of the abutment member (21) and can be covered on the conduction device.

10. A tobacco box, characterized in that: The invention comprises the conducting device according to any one of claims 1 to 7.

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