CN213271180U

CN213271180U - Drawing type negative pressure valve for waterproof case of photographic device

Info

Publication number: CN213271180U
Application number: CN202021711873.0U
Authority: CN
Inventors: 李勇; 陈文彬; 欧阳军
Original assignee: Mris Precision Co ltd
Current assignee: Mris Precision Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-25
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses a drawing type negative pressure valve for a waterproof case of a photographic device, which comprises a lower valve body, an upper valve body, a drawing rod, a first elastic element, a sealing cover and a second elastic element; the upper valve body is arranged on the lower valve body and encloses a first cavity; the drawing rod is movably arranged on the upper valve body in a penetrating way; the drawing rod is provided with an air inlet and outlet channel which is used for communicating the first cavity with the outside of the waterproof shell; the bottom of the lower valve body is provided with an air exhaust channel which communicates the interior of the shell with the first cavity; the drawing rod pushes the sealing cover tightly against the lower valve body through the first elastic element so as to close the air suction channel; the bottom of the lower valve body is also provided with a pressure relief channel communicated with the inside of the waterproof shell; the second elastic element is arranged on the upper valve body and used for driving the lower part of the pull rod to move downwards and blocking the pressure relief channel; a pressure relief hole which is used for communicating with the pressure relief channel after going upward is formed in the side wall of the lower part of the pull rod; the pressure relief hole is also communicated with the air inlet and outlet channel. The utility model is simple in operation, be convenient for adjust the inside and outside atmospheric pressure's of waterproof housing advantage.

Description

Drawing type negative pressure valve for waterproof case of photographic device

Technical Field

The utility model belongs to the technical field of the accessories technique of camera waterproof cover and specifically relates to a pull formula negative pressure valve for photographic arrangement's waterproof cover.

Background

The underwater photography is one of movie and television special effect photography, and a photographer carries a camera or a camera with a waterproof shell and diving equipment to dive into water for shooting; in addition, underwater images can be truly reflected by underwater photography, such as underwater animals and plants, seabed, riverbed, archaeological discovery and the like; therefore, with the development of science and technology, underwater photography gradually enters the lives of people, and is widely applied to scientific research, military, sports, teaching and other aspects.

Whereas a waterproof case is generally composed of an upper case and a lower case; nowadays, in order to further improve the compactness that the casing closed with lower casing lid on the casing, need carry out the operation of bleeding to the waterproof casing inside for the inside negative pressure that forms for air or sea water of waterproof casing compresses tightly upper casing and lower casing by this negative pressure, and is corresponding, still need be to the inside release air of waterproof casing with the pressure release when opening, makes the inside and outside pressure of waterproof casing the same side can open.

Therefore, there is a need for a pull-out type negative pressure valve for a waterproof case of a photographing device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a pull formula negative pressure valve for camera device's buckler to the problem among the above-mentioned prior art, the purpose makes this negative pressure valve cooperate external aspiration pump can carry out the operation of bleeding to the buckler, can also independently accomplish the pressure release operation.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

a drawing type negative pressure valve for a waterproof case of a photographic device comprises a lower valve body, an upper valve body, a drawing rod, a first elastic element, a sealing cover and a second elastic element; the upper valve body is arranged on the lower valve body and encloses a first cavity; the drawing rod is movably arranged on the upper valve body in a penetrating way; the drawing rod is provided with an air inlet and outlet channel which is used for communicating the first cavity with the outside of the waterproof shell; the bottom of the lower valve body is provided with an air exhaust channel which communicates the inside of the waterproof shell with the first cavity; the pull rod pushes the sealing cover tightly against the lower valve body through the first elastic element so as to close the air suction channel; the bottom of the lower valve body is also provided with a pressure relief channel communicated with the inside of the waterproof shell; the second elastic element is arranged on the upper valve body and used for driving the lower part of the pull rod to move downwards and blocking the pressure relief channel; a pressure relief hole which is used for communicating with the pressure relief channel after going upward is formed in the side wall of the lower part of the pull rod; the pressure relief hole is also communicated with the air inlet and outlet channel.

As a further elaboration of the above technical solution:

in the technical scheme, the lower part of the upper valve body extends into the lower valve body and is in threaded connection with the inner wall of the lower valve body; the outer side wall of the lower part of the upper valve body is also provided with a first annular groove; the first ring groove is sleeved with a first sealing ring which is matched with the inner wall of the lower valve body in the whole circumference.

In the technical scheme, the lower port of the pressure relief channel is communicated with the inside of the waterproof shell, and the upper port of the pressure relief channel is communicated with the first cavity; the lower part of the pull rod extends into the first cavity and then is formed with an annular shoulder; three second annular grooves are formed in the peripheral side wall of the annular shoulder from top to bottom in sequence; a second sealing ring is sleeved in each second annular groove; the three second sealing rings are matched with the inner wall of the first cavity to form a reciprocating type dynamic sealing structure; the second elastic resetting element drives the annular shoulder to move downwards to a position between two second sealing rings of which the upper ports are positioned at the upper side; the pressure relief hole is positioned between the two second sealing rings on the lower side.

In the technical scheme, the lower wall of the top of the upper valve body is upwards sunken to form a first sinking platform; the second elastic element is a pressure spring; the compression spring is sleeved on the pull rod, and the upper end and the lower end of the compression spring are respectively abutted against the annular shoulder and the first sinking platform.

In the technical scheme, the drawing rod comprises a main rod body, an air inlet and outlet core and a drawing cover; the main rod body is arranged on the top wall of the upper valve body in a penetrating mode; the air inlet and outlet core is arranged at the end part of the main rod body penetrating out of the upper valve body; the air inlet and outlet channel sequentially penetrates through the air inlet and outlet core and the main rod body from top to bottom; the drawing cover is sleeved on the periphery of the air inlet and outlet core.

In the above technical solution, the lower valve body is formed with a second sinking platform at the communication position of the air exhaust channel and the first cavity by sinking downwards; the sealing cover is made of silica gel and is stacked in the second sinking platform; a third annular groove is formed in the upper end face of the sealing cover; a plurality of positioning columns are formed on the upper end surface of the sealing cover upwards along the edge of the third annular groove; the first elastic element is a spiral compression spring; the lower part of the spiral compression spring is sleeved on the positioning columns, and the bottom end of the spiral compression spring is abutted against the third annular groove; and a third sinking platform for accommodating the upper end part of the spiral compression spring is upwards sunken on the bottom end surface of the pull rod.

In the technical scheme, the outer wall of the lower valve body is screwed with a protective cover for protecting the upper valve body and the pull rod, and the outer wall of the protective cover is provided with anti-skid stripes; still be equipped with on the outer wall of lower valve body with protective cover inner wall complex third sealing washer.

In the above technical solution, the lower wall of the lower valve body is formed with a boss downward; the side wall of the boss is formed with an external thread which is screwed with the waterproof shell; the lower wall of the lower valve body is further provided with a fourth sealing ring arranged around the circumferential direction of the boss.

The beneficial effects of the utility model reside in that:

wherein, the utility model discloses an go up the valve body and enclose into first cavity with lower valve body, the normally open inlet and outlet channel of first cavity and external intercommunication is gone out by the shaping of pull pole, and the shaping goes out the pressure release passageway that communicates with the inlet and outlet channel activity and communicate with the air bleed passage of first cavity activity on the valve body down, and then realized the tee bend structure of the inside and outside activity intercommunication formula of waterproof case, can accomplish the operation of bleeding by the external aspiration pump of pull pole cooperation, still can put into the waterproof case inside with the outside air through the mode of pulling up the pull pole, and the valve has the advantages of simple operation, excellent in use effect.

Drawings

FIG. 1 is a schematic structural view of the present invention with the pressure release passage open and the air exhaust passage closed;

fig. 2 is a schematic structural view of the pressure relief passage of the present invention in a closed state and an air exhaust passage in a closed state.

The reference numbers in the figures are respectively: 1. a lower valve body; 2. an upper valve body; 3. a pull rod; 4. a first elastic element; 5. a sealing cover; 6. a second elastic element; 7. a first cavity; 8. an air inlet and outlet passage; 9. an air extraction channel; 10. a pressure relief channel; 11. a pressure relief vent; 12. a first annular groove 13 and a first sealing ring; 14. an annular shoulder; 15. a second annular groove; 16. a second seal ring; 17. a lower port; 18. an upper port; 19. a first sinking platform; 20. a main rod body; 21. an air inlet and outlet core; 22. a pull cover; 23. a second sinking platform; 24. a third annular groove; 25. a positioning column; 26. a third sinking platform; 27. a protective cover; 28. anti-skid stripes; 29. a third seal ring; 30. a boss; 31. an external thread; 32. a fourth seal ring; A. and (4) a waterproof shell.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Fig. 1-2 illustrate a specific embodiment of a drawing type negative pressure valve for a waterproof case of a photographing device, referring to fig. 1-2, a drawing type negative pressure valve for a waterproof case of a photographing device includes a lower valve body 1, an upper valve body 2, a drawing rod 3, a first elastic member 4, a sealing cover 5, and a second elastic member 6. The upper valve body 2 is arranged on the lower valve body 1 and encloses a first cavity 7; the drawing rod 3 is movably arranged on the upper valve body 2 in a penetrating way; the drawing rod 3 is provided with an air inlet and outlet channel 8 which is used for communicating the first cavity 7 with the outside of the waterproof shell A; the bottom of the lower valve body 1 is provided with an air exhaust channel 9 for communicating the interior of the waterproof shell A with the first cavity 7; the drawing rod 3 pushes the sealing cover 5 tightly against the lower valve body 1 through the first elastic element 4 to close the air suction channel 9; the bottom of the lower valve body 1 is also provided with a pressure relief channel 10 communicated with the inside of the waterproof shell A; the second elastic element 6 is arranged on the upper valve body 2 and used for driving the side wall of the lower part of the pull rod 3 to move downwards and blocking the pressure relief channel 10; a pressure relief hole 11 which is used for communicating with the pressure relief channel 10 after going upward is formed in the side wall of the lower part of the pull rod 3; the pressure relief hole 11 is also communicated with the air inlet and outlet channel 8.

The utility model discloses a function is including cooperating the aspiration pump to inside bleeding of waterproof shell A and releasing into waterproof shell A two kinds with outside gas.

Wherein, the utility model discloses cooperate outside aspiration pump to waterproof shell A inside theory of operation of bleeding does: firstly, the first elastic element 4 tightly pushes the sealing cover 5 against the lower valve body 1 to close the air exhaust channel 9, the second elastic element 6 drives the lower side wall of the pull rod 3 to move downwards and block the pressure relief channel 10, at this time, the first cavity 7 is isolated from the inside of the waterproof shell a, and the first cavity 7 is communicated with the outside of the waterproof shell a through the air inlet and outlet channel 8; then, a suction nozzle of a suction pump is abutted with the upper end part of the pull rod 3, the suction pump pumps air in the first cavity 7 through the air inlet and outlet channel 8, so that the air pressure in the waterproof shell a is larger than the air pressure in the first cavity 7, the air pressure difference between the inside of the waterproof shell a and the inside of the first cavity 7 pushes the sealing cover 5 to move upwards to open the air suction channel 9, and the first elastic element 4 is compressed; then, the air pump continues to work, and partial or all air in the waterproof shell A is pumped out according to the use requirement; finally, when the air extraction operation is completed, the air tap of the air extraction pump is separated from the pull rod 3, at the moment, the inside of the waterproof shell A is communicated with the outside through the air extraction channel 9, the first cavity 7 and the air inlet and outlet channel 8 in sequence, and because the air pressure outside the waterproof shell A is larger than the air pressure inside the waterproof shell A, the air pressure difference inside and outside the waterproof shell A and the restoring force of the first elastic element 4 work together to tightly press the sealing cover 5 on the lower valve body 1 to close the air extraction channel 9.

Furthermore, the utility model discloses release into waterproof shell A's theory of operation with the external gas does: the drawing rod 3 is pulled up, so that the second elastic element 6 is compressed, and the pressure relief hole 11 is communicated with the pressure relief channel 10; at this moment, the inside of the waterproof case A is communicated with the outside through the pressure relief channel 10, the pressure relief hole 11, the first cavity 7 and the air inlet and outlet channel 8 in sequence, and finally the air outside the waterproof case A can rapidly enter the inside of the waterproof case A.

Further, go up the lower part of valve body 2 and stretch into down in the valve body 1 and with the inner wall threaded connection of valve body 1 makes the utility model has the characteristics of easily installation and dismantlement. Go up the lower part lateral wall of valve body 2 and still be equipped with first ring channel 12, first ring channel 12 go up the cover be equipped with 1 inner wall complete cycle complex first sealing washer 13 of valve body has improved down go up valve body 2 with sealed effect between the valve body 1 down.

Further, the lower port 17 of the pressure relief channel 10 is communicated with the inside of the waterproof case a, and the upper port 18 is communicated with the first cavity 7. The lower part of the pull rod 3 extends into the first cavity 7 and then is formed with an annular shoulder 14; three second annular grooves 15 are formed in the peripheral side wall of the annular shoulder 14 from top to bottom in sequence; a second sealing ring 16 is sleeved in each second annular groove 15; the three second sealing rings 16 are matched with the inner wall of the first cavity 7 to form a reciprocating type dynamic sealing structure. Thus: the second sealing ring 16 at the lowest side partitions the upper part and the lower part of the first cavity 7; the lower part of the first chamber 7, which is blocked, can communicate with the inside of the waterproof case a only through the suction passage 9 and can communicate with the outside of the waterproof case a only through the inlet and outlet passage 8. In addition, the three second sealing rings 16 are sequentially arranged between the peripheral side wall of the pull rod 3 and the inner wall of the first cavity 7 from top to bottom to form a first annular sealing cavity and a second annular sealing cavity in a separating mode, and the pressure relief hole 11 is communicated with the second annular sealing cavity. In an initial state, the second elastic element 6 is in a stretched state, and pushes the annular shoulder 14 downward, so that the upper port 18 of the pressure relief channel 10 is communicated with the first annular sealing cavity, and the pressure relief channel 10 is closed; when the rod 3 is pulled, the annular shoulder 14 goes up with respect to the upper port 18, so that the upper port 18 communicates into the second annular sealing chamber and with the air inlet and outlet channel 8 through the pressure relief hole 11.

Furthermore, the top lower wall of the upper valve body 2 is recessed upwards to form a first sinking platform 19; the second elastic element 6 is a pressure spring; the pressure spring suit is in on the pull pole 3, its upper and lower both ends support respectively and lean on annular circular bead 14 with on the first platform 19 that sinks, through pull pole 3 with it is right that first platform 19 that sinks the pressure spring carries on spacingly, has improved the utility model discloses a stability.

Preferably, the drawing rod 3 comprises a main rod body 20, an air inlet and outlet core 21 and a drawing cover 22. The main rod body 20 is arranged on the top wall of the upper valve body 2 in a penetrating way. Business turn over gas core 21 threaded connection is in the owner body of rod 20 is worn out go up the tip of valve body 2, make business turn over gas core 21's dismouting is more convenient, and then can change corresponding business turn over gas core 21 fast conveniently according to the different models of aspiration pump, has greatly improved the utility model discloses a general performance. The air inlet and outlet channel 8 sequentially penetrates through the air inlet and outlet core 21 and the main rod body 20 from top to bottom; the drawing cover 22 is sleeved on the periphery of the air inlet and outlet core 21, and the drawing cover 22 enables a user to pull up the drawing rod 3 more conveniently and more laborsavingly.

Preferably, the lower valve body 1 is formed with a second sinking platform 23 at the communication position of the air exhaust channel 9 and the first cavity 7 by downward sinking; the sealing cover 5 is made of silica gel and is stacked in the second sinking platform 23; the second sinking platform 23 limits the upward and downward movement of the sealing cover 5, so that the phenomenon that the air exhaust channel 9 cannot be accurately blocked due to the overlarge horizontal offset of the sealing cover 5 is avoided. A third annular groove 24 is formed on the upper end surface of the sealing cover 5; a plurality of positioning columns 25 are formed upwards on the upper end surface of the sealing cover 5 along the edge of the third annular groove 24; the first elastic element 4 is a helical compression spring; the lower part of the spiral compression spring is sleeved on the positioning columns 25, and the bottom ends of the spiral compression spring abut against the third annular groove 24; the bottom end surface of the pull rod 3 is recessed upwards to form a third sinking platform 26 for accommodating the upper end part of the spiral compression spring, so that the fixing effect of the second elastic element 6 is improved.

Further, the outer wall screw thread of lower valve body 1 has connect soon and is used for the protection go up valve body 2 with the protective cover 27 of pull pole 3, the outer wall of protective cover 27 is equipped with anti-skidding stripe 28. Still be equipped with down on the outer wall of valve body 1 with protective cover 27 inner wall complex third sealing washer 29 has improved the utility model discloses a sealed effect.

Further, the lower wall of the lower valve body 1 is formed with a boss 30 downward; the side wall of the boss 30 is formed with an external thread 31 for screwing with the thread of the waterproof shell A; the lower wall of the lower valve body 1 is also provided with a fourth sealing ring 32 arranged around the circumference of the boss 30; during specific installation, the boss 30 is screwed on the shell of the waterproof shell A, and the lower wall of the lower valve body 1 is sealed with the outer wall of the outer shell A through the fourth sealing ring 32.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A drawing type negative pressure valve for a waterproof case of a photographic device is characterized by comprising a lower valve body, an upper valve body, a drawing rod, a first elastic element, a sealing cover and a second elastic element; the upper valve body is arranged on the lower valve body and encloses a first cavity; the drawing rod is movably arranged on the upper valve body in a penetrating way; the drawing rod is provided with an air inlet and outlet channel which is used for communicating the first cavity with the outside of the waterproof shell; the bottom of the lower valve body is provided with an air exhaust channel which communicates the inside of the waterproof shell with the first cavity; the pull rod pushes the sealing cover tightly against the lower valve body through the first elastic element so as to close the air suction channel; the bottom of the lower valve body is also provided with a pressure relief channel communicated with the inside of the waterproof shell; the second elastic element is arranged on the upper valve body and used for driving the lower part of the pull rod to move downwards and blocking the pressure relief channel; a pressure relief hole which is used for communicating with the pressure relief channel after going upward is formed in the side wall of the lower part of the pull rod; the pressure relief hole is also communicated with the air inlet and outlet channel.

2. The pull-out type negative pressure valve for a waterproof case of a photographing device according to claim 1, wherein a lower portion of the upper valve body extends into the lower valve body and is threadedly coupled with an inner wall of the lower valve body; the outer side wall of the lower part of the upper valve body is also provided with a first annular groove; the first ring groove is sleeved with a first sealing ring which is matched with the inner wall of the lower valve body in the whole circumference.

3. The pull-out negative pressure valve for a waterproof case of a photographic device according to claim 1, wherein a lower port of the pressure relief channel is communicated with the inside of the waterproof case, and an upper port is communicated with the first cavity; the lower part of the pull rod extends into the first cavity and then is formed with an annular shoulder; three second annular grooves are formed in the peripheral side wall of the annular shoulder from top to bottom in sequence; a second sealing ring is sleeved in each second annular groove; the three second sealing rings are matched with the inner wall of the first cavity to form a reciprocating type dynamic sealing structure; the second elastic resetting element drives the annular shoulder to move downwards to a position between two second sealing rings of which the upper ports are positioned at the upper side; the pressure relief hole is positioned between the two second sealing rings on the lower side.

4. The pull type negative pressure valve for a waterproof case of a photographic apparatus according to claim 3, wherein the top lower wall of the upper valve body is recessed upward to form a first sunken platform; the second elastic element is a pressure spring; the compression spring is sleeved on the pull rod, and the upper end and the lower end of the compression spring are respectively abutted against the annular shoulder and the first sinking platform.

5. The pull-out type negative pressure valve for a waterproof case of a photographing device according to claim 1, wherein the pull-out lever comprises a main lever body, an air inlet and outlet core and a pull-out cover; the main rod body is arranged on the top wall of the upper valve body in a penetrating mode; the air inlet and outlet core is arranged at the end part of the main rod body penetrating out of the upper valve body; the air inlet and outlet channel sequentially penetrates through the air inlet and outlet core and the main rod body from top to bottom; the drawing cover is sleeved on the periphery of the air inlet and outlet core.

6. The draw-out type negative pressure valve for a waterproof case of a photographic device according to claim 5, wherein the lower valve body is formed with a second sinking platform at a position where the air suction channel is communicated with the first cavity in a downward concave manner; the sealing cover is made of silica gel and is stacked in the second sinking platform; a third annular groove is formed in the upper end face of the sealing cover; a plurality of positioning columns are formed on the upper end surface of the sealing cover upwards along the edge of the third annular groove; the first elastic element is a spiral compression spring; the lower part of the spiral compression spring is sleeved on the positioning columns, and the bottom end of the spiral compression spring is abutted against the third annular groove; and a third sinking platform for accommodating the upper end part of the spiral compression spring is upwards sunken on the bottom end surface of the pull rod.

7. The pull-out type negative pressure valve for a waterproof case of a photographing device according to any one of claims 1 to 6, wherein a protective cover for protecting the upper valve body and the pull-out rod is screwed on the outer wall of the lower valve body, and the outer wall of the protective cover is provided with anti-slip stripes; still be equipped with on the outer wall of lower valve body with protective cover inner wall complex third sealing washer.

8. The pull type negative pressure valve for a waterproof case of a photographing device according to claim 7, wherein a lower wall of the lower valve body is downwardly formed with a boss; the side wall of the boss is formed with an external thread which is screwed with the waterproof shell; the lower wall of the lower valve body is further provided with a fourth sealing ring arranged around the circumferential direction of the boss.