Telescopic movable straw container cover

Abstract

The utility model relates to the technical field of water cups, in particular to a telescopic movable straw container cover which comprises a cup cover body and a cover plate which are connected with each other, a sliding part is connected to the cover plate in a sliding mode, a rotating part is rotationally connected to the cup cover body, a tooth surface part is arranged on the sliding part, a gear is arranged on one side of the rotating part, and the gear is meshed with the tooth surface part. A mounting column is arranged on the other side of the rotating part, a mounting cylinder is arranged on the cup cover body, a water suction pipe is arranged in the mounting cylinder, a connecting plate is arranged on the outer side wall of the water suction pipe, a strip-shaped hole allowing the mounting column to stretch into is formed in the connecting plate, and the strip-shaped hole is transversely formed; the utility model provides a telescopic movable straw container cover which solves the problems that the length of a straw of a traditional straw cup cover cannot be adjusted, and the traditional straw cup cover is not convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water cup especially relates to a telescopic movable straw container cover. BACKGROUND

[0002] Now people are used to carrying water cup with them in order to replenish water in time, and the common straight drinking cup, straw cup and double drinking cup, especially the straw cup, can drink after opening the cup cover and using the straw, and water, beverage and the like are not easy to leak and spill, so that the straw cup has high evaluation in the market and is pursued by people.

[0003] But the length of the straw of the common straw cup on the market is relatively fixed, the straw part protruding from the cup cover cannot be stored in the water cup, which leads to the fact that the straw cup is easy to be knocked when carrying, and the overall volume of the water cup is increased due to the exposed straw, which is not conducive to transportation and carrying, and the use is not convenient. UTILITY MODEL CONTENT

[0004] In order to solve the above problems, the utility model provides a telescopic movable straw container cover, which solves the problem that the length of the straw of the traditional straw cup cover cannot be adjusted and the use is not convenient.

[0005] The utility model adopts the technical scheme: a telescopic movable straw container cover, which comprises a cup cover body and a cover plate connected with each other, a sliding piece is slidably connected to the cover plate, a rotating piece is rotatably connected to the cup cover body, a tooth surface part is arranged on the sliding piece, a gear is arranged on one side of the rotating piece, the gear is engaged with the tooth surface part, an installation column is arranged on the other side of the rotating piece, an installation cylinder is arranged on the cup cover body, a water suction pipe is arranged in the installation cylinder, a connecting plate is arranged on the outer wall of the water suction pipe, a strip-shaped hole is formed in the connecting plate and used for the installation column to extend into, and the strip-shaped hole is horizontally arranged.

[0006] Through the above technical scheme, the user drives the sliding piece to slide on the cover plate, the tooth surface part is engaged with the gear, the sliding tooth surface part drives the gear to rotate, the rotating piece rotates with the rotation of the gear, the installation column rotates on the cup cover body, the rotating installation column drives the connecting plate to move through the strip-shaped hole extending into, and the water suction pipe is lifted and lowered under the sliding of the sliding piece; the user can control the lifting and lowering of the water suction pipe by using the sliding piece, which is convenient for the user to adjust the height of the water suction pipe in time, and it is very convenient to drink water, beverage and the like, and the design makes the water suction pipe be stored in normal times, greatly reduces the volume of the cup cover, compresses the transportation cost of the factory, and makes the user carry more conveniently.

[0007] Further, a limiting slot is arranged on the cup cover body, and the limiting slot is communicated with the opening of the mounting cylinder; when the water suction pipe is lowered to the limit distance, the bottom of the connecting plate abuts against the bottom of the limiting slot.

[0008] Through the technical scheme, when the user drives the sliding member to lift or lower the water suction pipe, the abutting of the bottom of the connecting plate and the bottom of the limiting slot can be used to determine whether the water suction pipe is lowered to the limit position, which is more convenient to use, and the water suction pipe can be limited to avoid excessive lowering distance.

[0009] Further, a limiting slot is arranged on the cup cover body, and the limiting slot is communicated with the opening of the mounting cylinder; when the water suction pipe is lowered to the limit distance, the bottom of the connecting plate abuts against the bottom of the limiting slot.

[0010] Through the technical scheme, the gear transmits the driving force to the rotating member through the limiting column, so that the gear and the rotating member do not interfere with each other when the gear drives the rotating member to rotate, the transmission efficiency is higher, and the assembly of the rotating member on the cup cover body can be completed by only installing the limiting column in the positioning gap, so that the cup cover is more convenient to assemble.

[0011] Further, a first mounting plate is arranged in the limiting slot, the first mounting plate is vertically arranged, and the rotating member is limited between the first mounting plate and the inner wall of the limiting slot.

[0012] Through the technical scheme, the rotating member is limited between the first mounting plate and the inner wall of the limiting slot, so that the connection of the rotating member in the limiting slot is very stable, the rotating member is limited by the first mounting plate and the inner wall of the limiting slot when rotating, so as to avoid the rotating member from deviating or shaking, and the normal use of the rotating member is ensured.

[0013] Further, a second mounting plate is arranged in the limiting slot, the second mounting plate is vertically arranged, and the connecting plate is limited between the second mounting plate and the rotating member.

[0014] Through the technical scheme, the connecting plate is limited between the second mounting plate and the rotating member, so that the connecting plate can be limited by the vertically arranged second mounting plate and the rotating member when the connecting plate is lifted or lowered by the mounting column, the connecting plate will not tilt or shake due to uneven force, the driving force transmission efficiency of the sliding member to the water suction pipe is higher, and the user uses it more labor-saving.

[0015] Further, the sliding piece comprises a pushing part, a first extension plate and a second extension plate, the first extension plate and the second extension plate are connected at two sides of the pushing part respectively, the cover plate is provided with a first accommodating shell and a second accommodating shell correspondingly, the first extension plate is slidingly connected in the first accommodating shell, and the second extension plate is slidingly connected in the second accommodating shell.

[0016] Through the technical scheme, when the user drives the sliding piece to slide, the first accommodating shell guides the first extension plate, and the second accommodating shell guides the second extension plate, so that the sliding piece can slide along a fixed path on the cover plate, and the user can use it more conveniently and labor-savingly, the first extension plate is slidingly connected in the first accommodating shell, and the second extension plate is slidingly connected in the second accommodating shell, so that the volume of the assembled sliding piece and the cover plate is reduced, and the cup cover is more compact.

[0017] Further, the first extension plate is provided with a first hook, the first accommodating shell is provided with a first limiting opening correspondingly, the first hook and the first limiting opening are connected, the second extension plate is provided with a second hook, the second accommodating shell is provided with a second limiting opening correspondingly, the second hook and the second limiting opening are connected, the tooth surface part is arranged at the bottom of the first extension plate, the bottom of the first accommodating shell is provided with an avoiding opening, and the tooth surface part is engaged with the gear through the avoiding opening.

[0018] Through the technical scheme, the first hook and the first limiting opening are connected, and the second hook and the second limiting opening are connected, so that the connection between the sliding piece and the cover plate is very firm, and the installation of the sliding piece on the cover plate is very convenient, the first extension plate can distribute the force to the first accommodating shell when sliding, the second extension plate can distribute the force to the second accommodating shell when sliding, the first extension plate and the second extension plate are prevented from being deformed due to excessive force, and the service life of the sliding piece is effectively prolonged.

[0019] Further, the cover plate is provided with a first pressing part and a second pressing part at two sides respectively, the bottom of the first pressing part is provided with a third hook, the bottom of the second pressing part is provided with a fourth hook, the first elastic piece is arranged between the third hook and the first accommodating shell to abut against each other, the second elastic piece is arranged between the fourth hook and the second accommodating shell to abut against each other, the first positioning opening and the second positioning opening are arranged on the inner side wall of the cup cover body, the third hook can be connected with the first positioning opening, and the fourth hook can be connected with the second positioning opening.

[0020] Through the technical scheme, the user can dial the first pressing piece and the second pressing piece, so that the first elastic piece and the second elastic piece are forced to compress, until the third clamping hook and the first positioning opening are separated, and the fourth clamping hook and the second positioning opening are separated, so that the cover plate and the cup cover body can be disassembled, the user can clean the inside of the cup cover body and the cover plate, the inside dirt and bacteria of the cup cover after long-term use do not affect human health, and the drinking water health of the user is ensured.

[0021] Further, the cup cover body is provided with a ventilation hole for balancing air pressure.

[0022] Through the technical scheme, the ventilation hole is arranged to communicate the inside and outside of the cup cover, balance the air pressure inside and outside in time, and be more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative labor.

[0024] Figure 1 It is a schematic view of the overall structure of the present application;

[0025] Figure 2 It is a sectional view of the present application;

[0026] Figure 3 It is an explosion view of the present application;

[0027] Figure 4 It is a schematic view of the cover plate structure of the present application;

[0028] Figure 5 It is a schematic view of the cover plate structure of the present application;

[0029] Figure 6 It is a schematic view of the sliding piece structure of the present application;

[0030] Figure 7 It is a schematic view of the sliding piece structure of the present application;

[0031] Figure 8 It is a schematic view of the water absorption pipe structure of the present application;

[0032] Figure 9 It is a schematic view of the rotating piece structure of the present application;

[0033] Figure 10 It is a schematic view of the cup cover body structure of the present application;

[0034] Figure 11 The cup cover body structure diagram two of the utility model shows;

[0035] The utility model label information is as follows:

[0036] 1, cup cover body; 2, cover plate; 3, sliding member; 301, push part; 302, first extension plate; 303, second extension plate; 4, rotating member; 5, tooth surface part; 6, gear; 7, mounting column; 8, mounting cylinder; 9, water suction pipe; 10, connecting plate; 11, strip-shaped hole; 12, limit slot; 13, positioning notch; 14, limit column; 15, first mounting plate; 16, second mounting plate; 17, first containing shell; 18, second containing shell; 19, first clamping hook; 20, first limit port; 21, second clamping hook; 22, second limit port; 23, avoiding port; 24, first pressing member; 25, second pressing member; 26, third clamping hook; 27, fourth clamping hook; 28, first elastic member; 29, second elastic member; 30, first positioning port; 31, second positioning port; 32, air hole;

[0037] The utility model aims at realizing, function characteristics and advantages, and will be further described with reference to the drawings in conjunction with embodiments. DETAILED DESCRIPTION

[0038] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0040] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0041] Referring to Figures 1-11 As shown in the figure, a telescopic movable straw container cover includes a cup cover body 1 and a cover plate 2 connected with each other, a sliding piece 3 is slidably connected to the cover plate 2, a rotating piece 4 is rotatably connected to the cup cover body 1, a tooth surface part 5 is arranged on the sliding piece 3, a gear 6 is arranged on one side of the rotating piece 4, the gear 6 and the tooth surface part 5 are engaged, a mounting column 7 is arranged on the other side of the rotating piece 4, a mounting cylinder 8 is arranged on the cup cover body 1, a water suction pipe 9 is arranged in the mounting cylinder 8, a connecting plate 10 is arranged on the outer side wall of the water suction pipe 9, a strip-shaped hole 11 is formed in the connecting plate 10 and the mounting column 7 extends into the strip-shaped hole 11, and the strip-shaped hole 11 is arranged transversely. A user drives the sliding piece 3 to slide on the cover plate 2, the tooth surface part 5 and the gear 6 are engaged, the sliding tooth surface part 5 drives the gear 6 to rotate, the rotating piece 4 rotates with the rotation of the gear 6, the mounting column 7 rotates on the cup cover body 1, the rotating mounting column 7 drives the connecting plate 10 to move through the strip-shaped hole 11 extending into the strip-shaped hole 11, and the water suction pipe 9 is lifted and lowered under the sliding of the sliding piece 3; the user can control the lifting and lowering of the water suction pipe 9 by using the sliding piece 3, which is convenient for the user to adjust the height of the water suction pipe 9 in time, and is very convenient for drinking water, beverage and other liquids, and the design can store the water suction pipe 9 in daily life, greatly reduces the volume of the cup cover, compresses the transportation cost of the factory, and makes it more convenient for the user to carry.

[0042] Preferably, the diameter of the gear 6 is smaller than the diameter of the rotating piece 4.

[0043] Referring to Figure 2 , 3 , 10, 11, a limiting groove 12 is arranged on the cup cover body 1, the limiting groove 12 is in communication with the opening of the mounting cylinder 8, and the bottom of the connecting plate 10 and the bottom of the limiting groove 12 abut when the water suction pipe 9 is lowered to the limit distance. When the user drives the sliding piece 3 to lift and lower the water suction pipe 9, the abutting condition of the connecting plate 10 and the bottom of the limiting groove 12 is used to determine whether the water suction pipe 9 is lowered to the limit position, which is more convenient to use, and can also limit the water suction pipe 9 to avoid excessive lowering distance of the water suction pipe 9.

[0044] Referring to Figure 3 , 10 , 11, a positioning notch 13 is formed in the limiting groove 12, a limiting column 14 is arranged on the rotating piece 4, the limiting column 14 is connected with the gear 6, and the limiting column 14 and the positioning notch 13 are rotatably connected. The gear 6 transmits driving force to the rotating piece 4 through the limiting column 14, so that the gear 6 and the rotating piece 4 do not interfere with each other under the condition that the gear 6 drives the rotating piece 4 to rotate, the transmission efficiency is higher, and the assembly of the rotating piece 4 on the cup cover body 1 can be completed only by installing the limiting column 14 into the positioning notch 13, so that the cup cover is more convenient to assemble.

[0045] Referring toFigure 2 、 3 , the first mounting plate 15 is arranged in the limiting groove 12, the first mounting plate 15 is vertically arranged, and the rotating part 4 is limited between the first mounting plate 15 and the inner wall of the limiting groove 12. The rotating part 4 is limited between the first mounting plate 15 and the inner wall of the limiting groove 12, so that the connection of the rotating part 4 in the limiting groove 12 is very stable. When the rotating part 4 rotates, the rotating part 4 is limited by the first mounting plate 15 and the inner wall of the limiting groove 12, so as to avoid the rotating part 4 from being offset and shaken, and ensure the normal use of the rotating part 4.

[0046] Referring to Figure 2 、 3 , the second mounting plate 16 is arranged in the limiting groove 12, the second mounting plate 16 is vertically arranged, and the connecting plate 10 is limited between the second mounting plate 16 and the rotating part 4. The connecting plate 10 is limited between the second mounting plate 16 and the rotating part 4, so that when the connecting plate 10 is lifted under the driving of the mounting column 7, the connecting plate 10 can be limited by the vertically arranged second mounting plate 16 and the rotating part 4. The connecting plate 10 will not be tilted and shaken due to uneven force, so that the driving force transmission efficiency of the sliding part 3 to the water suction pipe 9 is higher, and the user uses it more labor-saving.

[0047] Preferably, the cross-sectional diameter of the first mounting plate 15 is greater than the cross-sectional diameter of the second mounting plate 16.

[0048] Referring to Figures 1-7 , the sliding part 3 includes a pushing part 301, a first extension plate 302 and a second extension plate 303, the first extension plate 302 and the second extension plate 303 are respectively connected on both sides of the pushing part 301, the cover plate 2 is correspondingly provided with a first containing shell 17 and a second containing shell 18, the first extension plate 302 is slidingly connected in the first containing shell 17, and the second extension plate 303 is slidingly connected in the second containing shell 18. When the user drives the sliding part 3 to slide, the first containing shell 17 guides the first extension plate 302, and the second containing shell 18 guides the second extension plate 303, so that the sliding part 3 can slide along the fixed path on the cover plate 2, and it is more convenient and labor-saving to use. The first extension plate 302 is slidingly connected in the first containing shell 17, and the second extension plate 303 is slidingly connected in the second containing shell 18, so that the volume of the assembled sliding part 3 and cover plate 2 is reduced, and the whole cup cover is more compact.

[0049] Referring to Figures 3-7As shown, a first hook 19 is provided on the first extension plate 302, and a first limiting opening 20 is provided on the first receiving shell 17. The first hook 19 and the first limiting opening 20 are engaged. A second hook 21 is provided on the second extension plate 303, and a second limiting opening 22 is provided on the second receiving shell 18. The second hook 21 and the second limiting opening 22 are engaged. The toothed surface 5 is provided at the bottom of the first extension plate 302, and a clearance opening 23 is provided at the bottom of the first receiving shell 17. The toothed surface 5 meshes with the gear 6 through the clearance opening 23. The engagement of the first hook 19 and the first limiting port 20, as well as the engagement of the second hook 21 and the second limiting port 22, makes the connection between the sliding member 3 and the cover plate 2 extremely secure and also makes the installation of the sliding member 3 on the cover plate 2 very convenient. When the first extension plate 302 slides, it can distribute the force to the first receiving shell 17, and when the second extension plate 303 slides, it can distribute the force to the second receiving shell 18, preventing the first extension plate 302 and the second extension plate 303 from cracking or deforming due to excessive force, thus effectively extending the service life of the sliding member 3.

[0050] See Figure 1 , 3 As shown, a first pressing member 24 and a second pressing member 25 are respectively provided on both sides of the cover plate 2. A third hook 26 is provided at the bottom of the first pressing member 24, and a fourth hook 27 is provided at the bottom of the second pressing member 25. A first elastic member 28 is abutted between the third hook 26 and the first receiving shell 17, and a second elastic member 29 is abutted between the fourth hook 27 and the second receiving shell 18. A first positioning port 30 and a second positioning port 31 are provided on the inner side wall of the cup lid body 1. The third hook 26 can engage with the first positioning port 30, and the fourth hook 27 can engage with the second positioning port 31. The user can press the first pressing member 24 and the second pressing member 25 to compress the first elastic member 28 and the second elastic member 29 until the third hook 26 and the first positioning port 30 are disengaged, and the fourth hook 27 and the second positioning port 31 are disengaged. Then the cover plate 2 and the cup lid body 1 can be disassembled. The user can clean the inside of the cup lid body 1 and the cover plate 2 to avoid the dirt and bacteria inside the cup lid affecting human health after long-term use, and to ensure the user's drinking water hygiene.

[0051] Preferably, the first elastic element 28 and the second elastic element 29 are springs.

[0052] Preferably, the first pressing member 24 and the second pressing member 25 are symmetrically arranged and have the same outline shape, and the third hook 26 and the fourth hook 27 are symmetrically arranged and have the same shape.

[0053] See Figure 11 As shown, the cup lid body 1 is provided with a vent 32 for balancing air pressure. The vent 32 allows the inside and outside of the cup lid to communicate, so as to balance the internal and external air pressure in a timely manner, making it more convenient to use.

[0054] The utility model discloses when using, user exerts force to push part 301, drive the slide 3 on the slide of apron 2, the first extension plate 302 slides in the first accommodating shell 17, the second extension plate 303 slides in the second accommodating shell 18, the sliding of tooth surface portion 5 with the slide of first extension plate 302, and tooth surface portion 5 and gear 6 engage, the sliding tooth surface portion 5 drive gear 6 rotation, rotating gear 6 drive the rotation of limit post 14 in the rotation of positioning gap 13, drive the rotation of rotating part 4, make installation column 7 rotate on cup cover body 1, rotating installation column 7 drive connecting plate 10 movement, make water suction pipe 9 can under the slide of slide 3 and carry out the lift, user can very convenient adjustment water suction pipe 9's height, drink water, beverage etc. Liquid is very convenient.

[0055] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and the equivalent structural transformation of the contents of the utility model specification and the drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A telescopic active straw container lid comprising a cup lid body (1) and a cover plate (2) connected to each other, characterized in that: The cover plate (2) is slidably connected with a sliding piece (3), the cup cover body (1) is rotatably connected with a rotating piece (4), the sliding piece (3) is provided with a tooth surface part (5), one side of the rotating piece (4) is provided with a gear (6), the gear (6) and the tooth surface part (5) are engaged, the other side of the rotating piece (4) is provided with a mounting column (7), the cup cover body (1) is provided with a mounting cylinder (8), the mounting cylinder (8) is provided with a water suction pipe (9) inside, the outer side wall of the water suction pipe (9) is provided with a connecting plate (10), the connecting plate (10) is provided with a strip-shaped hole (11) for the mounting column (7) to extend into, and the strip-shaped hole (11) is transversely arranged.

2. A telescoping straw container lid according to claim 1, wherein: The cup cover body (1) is provided with a limiting groove (12), the limiting groove (12) is communicated with the opening of the mounting cylinder (8); when the water suction pipe (9) is lowered to the limit distance, the bottom of the connecting plate (10) and the bottom of the limiting groove (12) abut.

3. A telescoping straw container lid according to claim 2, wherein: The limiting groove (12) is provided with a positioning notch (13), the rotating piece (4) is provided with a limiting column (14), the limiting column (14) is connected with the gear (6), and the limiting column (14) and the positioning notch (13) are rotatably connected.

4. A telescoping straw container lid according to claim 2 or 3, wherein: The limiting groove (12) is provided with a first mounting plate (15), and the first mounting plate (15) is vertically arranged; the rotating piece (4) is limited between the first mounting plate (15) and the inner wall of the limiting groove (12).

5. A telescoping straw container lid according to claim 4, wherein: The limiting groove (12) is provided with a second mounting plate (16), and the second mounting plate (16) is vertically arranged; the connecting plate (10) is limited between the second mounting plate (16) and the rotating piece (4).

6. A telescoping straw container lid according to claim 2 or 3 or 5, wherein: The sliding piece (3) comprises a pushing part (301), a first extension plate (302) and a second extension plate (303), the first extension plate (302) and the second extension plate (303) are connected on the two sides of the pushing part (301) respectively, the cover plate (2) is correspondingly provided with a first containing shell (17) and a second containing shell (18), the first extension plate (302) is slidably connected in the first containing shell (17), and the second extension plate (303) is slidably connected in the second containing shell (18).

7. A telescoping straw container lid according to claim 6, wherein: The first extension plate (302) is provided with a first clamping hook (19), the first containing shell (17) is correspondingly provided with a first limiting opening (20), the first clamping hook (19) and the first limiting opening (20) are clamped, the second extension plate (303) is provided with a second clamping hook (21), the second containing shell (18) is correspondingly provided with a second limiting opening (22), the second clamping hook (21) and the second limiting opening (22) are clamped, the tooth surface part (5) is arranged at the bottom of the first extension plate (302), the bottom of the first containing shell (17) is provided with an avoiding opening (23), and the tooth surface part (5) is engaged with the gear (6) through the avoiding opening (23).

8. A telescoping straw container lid according to claim 7, wherein: Two sides of the cover plate (2) are respectively provided with a first pressing piece (24) and a second pressing piece (25), the bottom of the first pressing piece (24) is provided with a third hook (26), the bottom of the second pressing piece (25) is provided with a fourth hook (27), the third hook (26) and the first containing shell (17) jointly abut a first elastic piece (28), the fourth hook (27) and the second containing shell (18) jointly abut a second elastic piece (29), the inner side wall of the cup cover body (1) is provided with a first positioning opening (30) and a second positioning opening (31), the third hook (26) can be clamped with the first positioning opening (30), and the fourth hook (27) can be clamped with the second positioning opening (31).

9. A telescoping straw container lid according to claim 2 or 3 or 5 or 7 or 8, wherein: The cup cover body (1) is provided with a vent hole (32) for balancing air pressure.

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