CN212791489U

CN212791489U - Spray gun container cover and spray gun liquid container

Info

Publication number: CN212791489U
Application number: CN202021356318.0U
Authority: CN
Inventors: 肖云
Original assignee: Qingdao Hanbai Plastic Technology Co ltd
Current assignee: Qingdao Hanbai Plastic Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-07-13
Publication date: 2021-03-26
Anticipated expiration: 2030-07-13

Abstract

The utility model relates to a spray gun container closing cap and spray gun liquid container, including the bowl cover, be provided with on the bowl cover and allow gaseous forward through getting into the bowl cover and not allowing the reverse air-breather that passes through of liquid in the bowl cover, air-breather includes the sealing member, and air-breather is opened through the change of shape to the sealing member, and air-breather is closed through the change of shape to the sealing member. The sealing element which can be elastically deformed along with the gravity or the air pressure of the paint vehicle and can be automatically closed or opened does not need to be manually opened or closed by a worker, so that the problem that the worker needs to manually open and close the cover is solved; the automatically opening vent mechanism avoids the problems of paint leakage or cup chipping that can result from a worker forgetting to operate the vent mechanism.

Description

Spray gun container cover and spray gun liquid container

Technical Field

The utility model relates to a spray gun container closing cap and spray gun liquid container.

Background

At present, when a spray gun is connected with a spray gun to spray paint outwards, liquid in a storage cup is continuously reduced, so that the external air pressure difference in the spray gun liquid storage cup is continuously increased, and further the storage cup is stressed and broken to cause the paint in the storage cup to flow out.

The existing method for balancing the internal and external air pressure difference of the spray gun liquid storage device is to arrange an air vent on the cup bottom or the cup wall of a storage cup, and the air vent is detachably connected with a cover. When the storage cup is inverted for painting, the cover is opened to allow the air holes to continuously balance the air pressure difference.

However, the above method has a problem that a worker is required to open and close the cover manually, and the operation is complicated and time-consuming. If the paint is forgotten to close the cover when the worker stores the paint, the paint can be leaked, and loss can be caused; if the cover is forgotten to be opened during paint spraying, the pressure difference between the inside and the outside of the cup body is too large, and the cup body is cracked.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, provide spray gun container closing cap and spray gun liquid container, solved the problem that needs the staff to open and close the lid by hand, solved and forgotten the problem that the paint vehicle that closes the lid and cause leaked.

A spray gun reservoir closure comprising a cup lid having an air vent mechanism provided thereon which allows forward passage of gas into the cup lid but does not allow reverse passage of liquid within the cup lid, the air vent mechanism comprising a seal which opens the air vent mechanism by a change in shape, the seal closing the air vent mechanism by a change in shape.

Preferably, the sealing member is made of an elastic material, a plurality of openings which change in size through elastic deformation are formed in the sealing member, the sealing member opens the ventilation mechanism through opening of the openings, and the sealing member closes the ventilation mechanism through closing of the openings.

Preferably, the sealing member includes a sealing portion of a pointed shape protruding upward, and the opening is formed on the sealing portion.

Preferably, the ventilation mechanism further comprises a hollow shell, the sealing element is arranged in the shell and fixedly connected with the shell, a shielding part is formed above the shell and positioned above the openings and used for shielding each opening, and a through hole is formed in the shielding part.

Preferably, the sealing portion is a hollow cone; the sealing part is a revolving body; the opening is a cut extending downward from the top end of the sealing portion.

Preferably, the openings are notches along a generatrix of the sealing portion, and the openings are circumferentially and uniformly distributed along a central axis of the sealing portion.

Preferably, a generatrix of the seal portion is curved in a direction of a central axis of the seal portion.

Preferably, two sides of the sealing part are respectively provided with a side surface extending upwards and inwards, and an opening is formed at the intersection line of the two side surfaces and is a linear cut.

Preferably, the casing and bowl cover fixed connection, the sealing member still includes the fixed part, sealing part and fixed part integrated into one piece, fixed part and casing fixed connection.

Preferably, the shielding part is provided with a plurality of through holes which are uniformly distributed along the circumference of the central shaft of the sealing part, a plurality of fixing hooks which are uniformly distributed along the circumference of the central shaft of the sealing part are formed below the housing, the fixing part is provided with a plurality of fixing holes, each fixing hook penetrates through one corresponding fixing hole to fixedly connect the fixing part with the housing, the fixing hooks correspond to the fixing holes one by one, and any fixing hook is inserted into any fixing hole to enable the shielding part to be positioned above the opening and shield each opening;

preferably, the number of the through holes, the fixing hooks, and the fixing holes is 4.

The spray gun liquid container with the seal cover is used, and the spray gun liquid container further comprises a hard cup body, and the cup cover is detachably connected with the hard cup body.

Preferably, the fixing part of the sealing element is arranged in the shell and is clamped and fixed with the shell.

Preferably, the ventilation mechanism further comprises a fixing piece which is fixedly connected with the shell and used for pressing and fixing the fixing part of the sealing piece in the shell.

Preferably, the elastic material is: TPU, TPE, TPR, TPV, CPE, plastic and rubber.

The utility model has the advantages of it is following: the sealing element can elastically deform along with the gravity or air pressure of the paint, so that the sealing element can be automatically closed or opened, and a ventilation mechanism does not need to be manually opened or closed by a worker, so that the problem that the worker needs to manually open and close the cover is solved; the automatically opening vent mechanism avoids the problems of paint leakage or cup chipping that can result from a worker forgetting to operate the vent mechanism. The shielding part plays a role of shielding the paint from the opening, so that the paint is prevented from directly impacting the opening to open the opening to cause the outflow of the paint; the corresponding fixed hook and the fixed hole ensure that the opening is always below the shielding part when the sealing element is assembled, and the misassembly during the assembly is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawing in the following description is only an embodiment of the invention, and that for a person skilled in the art, other embodiments can be derived from the drawing provided without inventive effort.

FIG. 1: the utility model discloses a three-dimensional structure sketch map of the ventilation mechanism in the eighth embodiment;

FIG. 2: in the eighth embodiment of the present invention, the first explosion structure of the ventilation mechanism is schematically illustrated;

FIG. 3: the second explosion structure schematic diagram of the ventilation mechanism in the eighth embodiment of the invention;

FIG. 4: the sectional structure of the ventilation mechanism in the eighth embodiment of the invention is schematically shown;

FIG. 5: the sectional structure schematic diagram of the ventilation mechanism in the ninth embodiment of the utility model;

FIG. 6: the utility model discloses use the spray gun liquid container's of spray gun container closing cap in the eighth embodiment the spatial structure sketch map;

FIG. 7: the utility model discloses use spray gun liquid container's of spray gun container closing cap in the embodiment eight sectional structure sketch map;

FIG. 8: the utility model discloses use the section view structure sketch map of spray gun liquid container of spray gun container closing cap in the fourth embodiment;

FIG. 9: the utility model discloses a schematic sectional three-dimensional structure diagram of a spray gun liquid container using a spray gun container sealing cover in the fourth embodiment;

FIG. 10: the top view structure schematic diagram of the spray gun storage container sealing cover in the fourth embodiment of the utility model;

FIG. 11: the utility model discloses use the three-dimensional structure sketch map of the spray gun liquid container of the spray gun container closing cap in the fourth embodiment;

FIG. 12: the utility model has a partial enlarged structure schematic diagram at A;

FIG. 13: the three-dimensional structure of the sealing element in the fourth embodiment of the utility model is schematically shown;

FIG. 14: the cross-sectional front view structure schematic diagram of the ventilation mechanism in the fifth embodiment of the utility model;

FIG. 15: the embodiment of the utility model provides a ventilation mechanism in five overlooks the schematic structure.

Detailed Description

The invention will be further described with reference to the following figures and examples:

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1 to 7, the present embodiment provides a spray gun reservoir closure comprising a lid 2, the lid 2 being provided with a vent mechanism 3 which allows gas to pass in a forward direction into the lid 2 but does not allow liquid in the lid 2 to pass in a reverse direction, the vent mechanism comprising a seal 32, the seal 32 opening the vent mechanism by a change in shape, the seal 32 closing the vent mechanism by a change in shape.

Preferably, the sealing member 32 is made of an elastic material, the sealing member 32 is formed with a plurality of openings 321a that can change size through elastic deformation, the sealing member 32 opens the ventilation mechanism by opening the openings 321a, and the sealing member 32 closes the ventilation mechanism by closing the openings 321 a.

Preferably, the sealing member 32 includes a sealing portion 321 having a pointed shape protruding upward, and the opening 321a is formed on the sealing portion 321. The pointed shape means that the top end of the sealing portion 321 is gathered to a point or a line.

Preferably, the sealing portion 321 is a hollow cone; the sealing part 321 is a pyramid; the opening 321a is a cut extending downward from the top end of the sealing portion 321, and the opening 321a is a cut of the side edge of the sealing portion 321.

Preferably, the side surface of the pyramid is curved in the central axis direction of the sealing portion 321, and the side surface of the pyramid is a curved surface or a flat surface.

Preferably, the sealing portion 321 is a hollow cone; the seal portion 321 is a rotary body; the opening 321a is a cut extending downward from the top end of the sealing portion 321.

Preferably, the openings 321a are slits along a generatrix of the sealing portion 321, and the openings 321a are circumferentially and uniformly distributed along a central axis of the sealing portion 321.

Preferably, a generatrix of the sealing portion 321 is a curved line or a straight line bent in a central axis direction of the sealing portion 321.

The working principle is as follows:

when spraying paint, as shown in fig. 7, the cup cover 2 is in an inverted state. The paint is arranged above the cup cover 2. At this time, the paint is pressed above the side surface of the sealing member 32 by its own weight, so that the sealing portion 321 is deformed, and the generatrix (side surface) of the sealing portion 321 is further bent toward the central axis direction (inside) of the sealing portion 321, so that all the openings 321a are closed (that is, the sealing portions 321 on both sides of the opening 321a are pressed together to close the opening 321 a), thereby preventing the paint from flowing downward out of the cup lid 2 through the sealing portion 321.

When the pressure difference between the inside of the cup lid 2 and the outside is larger and larger, the outside pressure is high, and the opening 321a is pushed open (i.e., the sealing portion 321 is elastically deformed by force to enlarge the opening 321 a), so that the outside air can pass through the opening 321 a. Since the air flow is from bottom to top through the opening 321a, paint does not flow out of the opening 321a from top to bottom.

The outside air enters the cup lid 2 from the cavity 321b inside the sealing part 321 through the opening 321 a. Therefore, the air pressure difference inside and outside the cup cover 2 can be balanced, and the phenomenon that the air pressure difference between the inside of the cup cover 2 and the outside is too large due to too low air pressure is prevented, so that the cup cover 2 is damaged due to stress.

When some paint remains after use, the cup lid 2 is rotated 180 degrees upright and the paint moves away from the seal 321 by gravity.

Example two:

as shown in fig. 8 to 13, the present embodiment provides a spray gun reservoir closure comprising a lid 2, the lid 2 being provided with a vent mechanism 3 which allows gas to pass in a forward direction into the lid 2 but does not allow liquid in the lid 2 to pass in a reverse direction, the vent mechanism comprising a seal 32, the seal 32 opening the vent mechanism by a change in shape, the seal 32 closing the vent mechanism by a change in shape.

Preferably, two sides of the sealing portion 321 are respectively formed with a side surface extending upwards and inwards, an opening 321a is formed at an intersection line of the two side surfaces, and the opening 321a is a linear cut.

Preferably, both side surfaces are flat surfaces or curved surfaces bent toward the central axis direction of the sealing part 321.

Preferably, two vertical surfaces extending upward are formed above the two side surfaces, and the two vertical surfaces are in contact with each other, such as a duckbill valve shape, so that the contact area of the sealing portion 321 on the two sides of the opening 321a is increased, and the sealing effect is enhanced.

The working principle is as follows:

when spraying paint, as shown in fig. 8, the cup cover 2 is in an inverted state. The paint is arranged above the cup cover 2. At this time, the paint is pressed above the two side surfaces of the sealing member 32 by its own weight, so that the sealing portion 321 is deformed, and the two side surfaces of the sealing portion 321 are further bent toward (inside) the central axis direction of the sealing portion 321, so that the opening 321a at the top end is closed (i.e., the side surfaces on both sides of the opening 321a are pressed together to close the opening 321 a), thereby preventing the paint from flowing downward out of the cup lid 2 through the sealing portion 321.

Example three:

as shown in fig. 8 to 15, this embodiment is a further aspect of the first embodiment or the second embodiment.

The ventilation mechanism 3 further comprises a hollow shell 31, the sealing element 32 is arranged in the shell 31 and is fixedly connected with the shell 31, a shielding part 312 is formed above the shell 31, the shielding part 312 is positioned above the openings 321a and shields each opening 321a, and a through hole 31a is formed in the shielding part 312.

Preferably, the housing 31 is fixedly connected with the cup cover 2, and the sealing member 32 is fixedly connected with the housing 31.

The working principle is as follows: when paint moves toward seal 32 until it contacts seal 321, if paint directly impacts opening 321a and its surrounding area, the opening 321a is elastically deformed by external force to open the opening 321a, and paint flows downward from the inside of cup 1 and out of cup lid 2. The shielding portion 312 serves to shield the opening 321a from paint, i.e., paint first strikes above the shielding portion 312 and then flows downward from the through hole 31a in the side of the shielding portion 312. Since there is no opening 321a below the through hole 31a, the paint first contacts the side surface of the sealing portion 321, bends the side surface inward, and closes the opening 321a by closely contacting both sides of the opening 321 a. Without the direct impact of the paint on opening 321a, opening 321a will not be opened by the impact and the paint inside cup lid 2 will not flow down cup lid 2.

Example four:

as shown in fig. 8 to 13, this embodiment is a further aspect of the third embodiment.

The ventilation mechanism 3 further includes a hollow housing 31, the sealing member 32 is disposed in the housing 31, the sealing member 32 further includes a fixing portion 322, the sealing portion 321 and the fixing portion 322 are integrally formed, and the fixing portion 322 is fixedly connected with the housing 31.

Preferably, the shielding portion 312 is formed with a plurality of through holes 31a uniformly distributed along the circumference of the central axis of the sealing portion 321, a plurality of fixing hooks 313 uniformly distributed along the circumference of the central axis of the sealing portion 321 are formed below the housing 31, a flange is formed below the fixing portion 322, a plurality of fixing holes 322b are formed on the flange of the fixing portion 322, each fixing hook 313 penetrates through one corresponding fixing hole 322b to fixedly connect the fixing portion 322 with the housing 31, the fixing hooks 313 correspond to the fixing holes 322b one by one, and any fixing hook 313 is inserted into any fixing hole 322b to enable the shielding portion 312 to be located above the opening 321a and shield each opening 321 a;

preferably, the through holes 31a, the fixing hooks 313, and the fixing holes 322b are all 4.

The working principle is as follows:

take 4 through holes 31a, fixing hooks 313 and fixing holes 322b as an example. As shown in fig. 10 and 13, the connecting line between two pairs of two opposite through holes 31a is two vertical connecting lines, and the shielding portion 312 is cross-shaped. The connecting line between two pairs of opposite fixing hooks 313 is two vertical connecting lines.

When the sealing portion is a cone in the first embodiment, the number of the openings 321a is 4, and a cross shape is formed.

As shown in fig. 13, the opening 321a is blocked by the blocking portion 312. Since the fixing hooks 313 and the fixing holes 322b are 4 and are engaged, the sealing member 32 has only four mounting positions with respect to the housing 31. Since the cross-shaped shielding portion 312 shields the side surfaces of the four-direction sealing portions 321, if all the openings 321a are shielded by the shielding portion 312 at one mounting position of the sealing member 32 with respect to the housing 31, all the openings 321a are shielded by the shielding portion 312 at any other mounting position. This allows the sealing member 32 to be directly mounted without considering the position relative to the housing 31, thereby saving the mounting time and preventing the opening 321a from being blocked by the blocking portion 312 due to the angle.

When the sealing member 32 is installed, the fixing hole 322b is elastically deformed to increase the area of the fixing hole 322b so as to pass through the enlarged portion below the fixing hook 313, and then the fixing hole 322b is contracted and rebounded after passing through the enlarged portion, and the area of the fixing hole 322b is smaller than the area of the enlarged portion of the fixing hook 313 to restrict the downward movement of the sealing member 32.

In this embodiment, the radius of the circle defined by the outer edges of the openings 321a of the sealing element 32 in the first embodiment and the length of the opening 321a of the sealing element 32 in the second embodiment may be greater than or equal to the length of the connection line between the two opposite through holes 31a, and at this time, the shielding portion 312 still shields the opening 321 a. This arrangement can maximize the length of the opening 321a in the limited cross-sectional area of the casing 1, and increase the amount of air taken into the opening 321a per unit time.

Example five:

as shown in fig. 14 and 15, this embodiment is a further aspect of the third embodiment.

The radius of the circle defined by the outer edge of the opening 321a of the sealing member 32 in the first embodiment and the length of the opening 321a of the sealing member 32 in the second embodiment are smaller than the distance from any one of the through holes 31a to the central axis of the sealing member 32, and at this time, the shielding portion 312 shields the opening 321a when the sealing member 32 rotates at any angle in the housing 32. The scheme can be directly installed without considering the position of the sealing element 32 relative to the shell 31, so that the installation time is saved, and the problem that the opening 321a is not shielded by the shielding part 312 due to the non-angle is avoided. The scheme does not need to limit the sealing element 32 relative to the shell 31 in the circumferential direction, and the structure is simple.

Example six:

this embodiment is a further aspect of the first or second embodiment.

The sealing portion 321 of the sealing member 32 is directly fixed to the lid 2, for example, the sealing portion 321 is fixed to the lid 2 by adhesion.

Example seven:

this embodiment is a further aspect of the first or second embodiment.

The sealing member 32 further includes a fixing portion 322, and the sealing portion 321 is integrally formed with the fixing portion 322.

The fixing portion 322 of the sealing element 32 is directly fixed to the lid 2, for example, the fixing portion 322 is bonded to the lid 2 or welded to the lid 2.

Example eight:

as shown in fig. 1 to 4, 6 and 7, this embodiment is a further scheme of any one of the first embodiment, the second embodiment, the third embodiment or the fifth embodiment.

The ventilation mechanism 3 further comprises a housing 31 and a fixing member 33, wherein the fixing member 33 is formed with a second through hole 33a, and the fixing member 33 is fixedly connected with the housing 31 and presses and fixes the fixing part 322 of the sealing member 32 in the housing 31.

Preferably, the housing 31 is integrally formed with the lid 2.

The fixing portion 322 is a projection of the sealing member 32. Preferably, the fixing portion 322 is formed with a flange. The housing 31 is a hollow cylinder having an inner boss formed at one end thereof.

When mounting, the sealing member 32 is inserted into the housing 31 until the fixing portion 322 contacts the inner boss, and then the fixing member 33 is inserted into the housing 31 and fixed to the housing 31 such that the fixing portion 322 is pressed against the inner boss above the fixing member 33.

Preferably, the fixing member 33 is formed with a third connecting portion 331, and the housing 31 is formed with a first connecting portion 311. The third connecting portion 331 is fixed to the first connecting portion 311 in a snap-fit manner. Preferably, the third connecting portion 331 and the first connecting portion 311 are mutually convex and concave.

Preferably, the fixing member 33 is fixed to the housing 31 by bonding or welding.

Example nine:

as shown in fig. 5, 14 and 15, this embodiment is a further aspect of any one of the first embodiment, the second embodiment, the third embodiment or the fifth embodiment.

The ventilation mechanism 3 further comprises a shell 31, the shell 31 is fixedly connected with the cup cover 2, and the sealing element 32 and the fixing part 322 are arranged in the shell 31 and are clamped and fixed with the shell 31.

Preferably, the housing 31 is integrally formed with the lid 2.

The fixing portion 322 is formed with a second connecting portion 3221, and the housing 31 is formed with a first connecting portion 311. When mounting, the fixing portion 322 is pinched to reduce the volume of the first through hole 322a, the fixing portion 322 is inserted into the housing 31, and the first connecting portion 311 is inserted into the second connecting portion 3221. After the fixing portion 322 is released, the fixing portion 322 is restored, and the first connecting portion 311 is inserted into the second connecting portion 3221 to fix the sealing member 32 and the housing 31.

Preferably, the first connecting portion 311 and the second connecting portion 3221 are protrusions and grooves.

Example ten:

as shown in fig. 1 to 15, this embodiment is a further aspect of any one of the first to ninth embodiments.

The spray gun liquid container with the seal cover is used, and further comprises a hard cup body 1, and the cup cover 2 is detachably connected with the hard cup body 1.

The working principle is as follows:

when the hard cup body 1 is used: the hard cup body 1 is internally provided with paint, and the cup cover 2 and the cup body 1 can be fixed in a threaded connection mode. The spray gun is fixed on the liquid channel 21 of the cup cover 2 by screw thread connection.

The spray gun liquid reservoir was turned upside down. At this time, the paint in the hard cup body 1 moves downwards under the action of gravity, and the paint moves to the cup cover 2. At this time, the paint is pressed above the side surface of the sealing member 32 by its own weight, so that the sealing portion 321 is deformed, and the generatrix (side surface) of the sealing portion 321 is further bent toward the central axis direction of the sealing portion 321, so that all the openings 321a are closed, that is, the sealing portions 321 on both sides of the openings 321a are pressed together to close the sealing portion 321, and the paint is prevented from flowing out of the cup lid 2 downward through the sealing portion 321.

The spray gun sprays paint, along with the paint vehicle in the stereoplasm cup 1 is less and less, the atmospheric pressure difference between inside and the external world of stereoplasm cup 1 is bigger and bigger, and external atmospheric pressure is high, backs up opening 321a and sealing 321 makes sealing 321 grow promptly sealing 321 atress elastic deformation to make external gas can be through opening 321 a. Since the air flow is from bottom to top through the opening 321a, paint does not flow out of the opening 321a from top to bottom.

Ambient air enters the hard cup 1 and lid 2 from the cavity 321b through the opening 321 a. Therefore, the air pressure difference between the inside and the outside of the hard cup body 1 can be balanced, and the phenomenon that the air pressure difference between the inside of the hard cup body 1 and the outside is too large due to too low air pressure is prevented, so that the hard cup body 1 is damaged under stress.

When the use is completed or a portion of paint remains in the rigid cup 1, the spray gun liquid reservoir is rotated to be upright, the seal 321 returns to its original shape, and the opening 321a is closed.

The shielding portion 312 has the following effects.

The shielding portion 312 serves to shield the opening 321a from paint, i.e., paint first strikes above the shielding portion 312 and then flows downward from the through hole 31a in the side of the shielding portion 312. Since there is no opening 321a below the through hole 31a, the paint first contacts the side surface of the sealing portion 321, bends the side surface inward, and closes the opening 321a by closely contacting both sides of the opening 321 a. Without paint directly impacting opening 321a, opening 321a will not open upon impact and paint inside cup 1 will not flow down out of cup 1.

The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.

Claims

1. Spray gun reservoir closing cap, including bowl cover (2), its characterized in that: the cup cover (2) is provided with a ventilation mechanism (3) which allows gas to pass into the cup cover (2) in the forward direction and does not allow liquid in the cup cover (2) to pass in the reverse direction, the ventilation mechanism comprises a sealing element (32), the sealing element (32) opens the ventilation mechanism through the change of the shape, and the sealing element (32) closes the ventilation mechanism through the change of the shape.

2. The spray gun reservoir cover of claim 1, wherein: the sealing element (32) is made of elastic materials, a plurality of openings (321 a) which change in size through elastic deformation are formed in the sealing element (32), the sealing element (32) opens the ventilation mechanism through opening of the openings (321 a), and the sealing element (32) closes the ventilation mechanism through closing of the openings (321 a).

3. The spray gun reservoir cover of claim 2, wherein: the sealing member (32) includes a sealing portion (321) having a pointed shape protruding upward, and the opening (321 a) is formed on the sealing portion (321).

4. The spray gun reservoir cover of claim 3, wherein: the ventilation mechanism (3) further comprises a hollow shell (31), the sealing element (32) is arranged in the shell (31) and fixedly connected with the shell (31), a shielding part (312) is formed above the shell (31), the shielding part (312) is positioned above the openings (321 a) and shields each opening (321 a), and a through hole (31 a) is formed in the shielding part (312).

5. The spray gun reservoir cover of claim 4, wherein: the sealing part (321) is a hollow cone; the sealing part (321) is a revolving body; the opening (321 a) is a cut extending downward from the top end of the sealing part (321).

6. The spray gun reservoir cover of claim 5, wherein: the openings (321 a) are notches along the generatrix of the sealing part (321), and the openings (321 a) are circumferentially and uniformly distributed along the central axis of the sealing part (321).

7. The spray gun reservoir cover of claim 4, wherein: two sides of the sealing part (321) are respectively provided with a side face extending upwards and inwards, an opening (321 a) is formed at the intersection line of the two side faces, and the opening (321 a) is a linear cut.

8. The spray gun reservoir cover of claim 4, wherein: casing (31) and bowl cover (2) fixed connection, sealing member (32) still include fixed part (322), sealing part (321) and fixed part (322) integrated into one piece, fixed part (322) and casing (31) fixed connection.

9. The spray gun reservoir cover of claim 8, wherein: shelter from portion (312) and be formed with a plurality of through-hole (31 a) that do circumference evenly distributed along the center pin of sealing (321), casing (31) below is formed with a plurality of and is made circumference evenly distributed's fixed hook (313) along the center pin of sealing (321), fixed part (322) are formed with a plurality of fixed orifices (322 b), and every fixed hook (313) all pass rather than one fixed orifices (322 b) that corresponds with fixed part (322) and casing (31) fixed connection, fixed hook (313) and fixed orifices (322 b) one-to-one, and arbitrary fixed hook (313) all make in inserting arbitrary fixed orifices (322 b) shelter from portion (312) and be located opening (321 a) top and shelter from each opening (321 a).

10. The spray gun reservoir cover of claim 6, wherein: the generatrix of the seal portion (321) is a curved line bent in the direction of the central axis of the seal portion (321).

11. The spray gun reservoir cover of claim 9, wherein: the number of the through holes (31 a), the fixing hooks (313) and the fixing holes (322 b) is 4.

12. A spray gun liquid reservoir for use with a spray gun reservoir cover according to any one of claims 1 to 11 wherein: still include stereoplasm cup (1), bowl cover (2) and stereoplasm cup (1) can be dismantled and be connected.