Drawing type mechanical vacuum valve for waterproof shell

Abstract

The utility model discloses a drawing type mechanical vacuum valve for a waterproof shell, which comprises a valve body, a valve core and a sleeve, the valve body is provided with a first mounting cavity, the valve core is provided with a second mounting cavity, and the sleeve is provided with a third mounting cavity; the third mounting cavity and the second mounting cavity are communicated to form an air exhaust channel; the first installation cavity is provided with a limiting step, a first elastic reset piece and a first sealing ring are arranged at the position of the limiting step, and the first sealing ring is located between the valve element and the inner side wall of the valve body. The valve element is provided with an air channel opening, and a sealing piece is arranged at the air channel opening. Thus, the valve body and the valve element can be pulled and moved, and the sealing ring is arranged between the valve body and the valve element, so that when the valve element is pulled out, external air can directly enter the waterproof shell from a gap between the valve element and the valve body, and compared with an existing vacuum valve with the waterproof shell, the vacuum valve with the waterproof shell has the advantages that an air inlet channel is simpler; the production realization of factories is facilitated; and the air inlet reliability is ensured.

Description

Technical Field

[0001] The utility model relates to the field of camera waterproof shells, in particular to a pull-out type mechanical vacuum valve used for the waterproof shells. Background Art

[0002] Underwater photography is one of the special effects photography methods in movies and TV. The photographer carries a camera with a protective cover and diving equipment, dives into the water and shoots directly. Underwater photography can truly reflect underwater scenes, such as the life of aquatic animals and plants, geological data of the seabed and riverbed, archaeological discoveries, etc. Underwater photography is widely used in scientific research, sports, teaching, etc., and underwater photography has gradually entered people's lives with the development of technology.

[0003] The waterproof housings of cameras currently used for underwater photography have good waterproof sealing performance. Most of them are made of hard, firm and corrosion-resistant aluminum alloy materials, which can protect the performance of the camera to the greatest extent. The sealing performance of the waterproof housing is related to the safety of the camera and the lens. Once a leak occurs underwater and is not discovered or handled in time, the camera and the lens may be destroyed due to a short circuit and cannot be repaired. A feasible way is to monitor the air pressure inside the camera waterproof housing in real time through electronic components to predict the sealing performance of the entire system in advance. Therefore, a vacuum valve (such as CN213271180U, CN206918331U) that can quickly establish a vacuum and replenish air pressure is urgently needed. However, the waterproof vacuum valve of the current camera has a complex structure and is inconvenient to manufacture. Especially after the shooting is completed, when air needs to be released into the waterproof housing to relieve pressure, the existing air intake channel needs to be provided with corresponding channel structures on multiple parts, which is troublesome and increases the manufacturing cost of the manufacturer.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In order to solve the defects and shortcomings of the above-mentioned prior art, the utility model provides a pull-out type mechanical vacuum valve for a waterproof shell, which can be pulled and moved between the valve body and the valve core, and a sealing ring is arranged between the valve body and the valve core. Furthermore, when the valve core is pulled out, external air can directly enter the waterproof shell from the gap between the valve core and the valve body. Compared with the existing waterproof shell vacuum valve, the air intake channel is simpler, which is more conducive to the factory's production implementation and ensures the reliability of air intake.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pull-out mechanical vacuum valve for a waterproof shell, comprising a valve body, a valve core, and a sleeve, wherein the valve body has a first installation cavity that is vertically through-going, the valve core has a second installation cavity that is vertically through-going, and the sleeve has a third installation cavity; the valve core is vertically movably installed in the first installation cavity, the sleeve is installed in the second installation cavity, the third installation cavity is a vertically through-going cavity, and the third installation cavity is connected to the second installation cavity to form an air extraction channel;

[0008] The first installation cavity has a limiting step, a first elastic reset member for pushing the valve core to reset downward is arranged below the limiting step, and a first sealing ring is arranged above the limiting step in the first installation cavity, and the first sealing ring is located between the valve core and the inner side wall of the valve body;

[0009] Furthermore, the valve core has an airway opening, and a sealing member is arranged at the airway opening.

[0010] As a preferred embodiment, the invention further comprises a pull-out rod, which is installed in the third installation cavity; the pull-out rod has an air vent which passes through from top to bottom, and the air vent is connected to the air extraction channel. When exhausting air, the pull-out rod is used to connect to the air extraction cylinder, that is, the air vent of the pull-out rod is connected to the air extraction cavity of the air extraction cylinder.

[0011] As a preferred solution, the valve core is provided with a limit rod, the pull rod has a limit hole adapted to the limit rod, and the limit hole is in the shape of a strip extending in the up-down direction.

[0012] As a preferred solution, a second elastic return member for driving the sealing member to cover the airway opening is installed in the second installation cavity.

[0013] As a preferred embodiment, a sleeve is further included, which is installed in the second installation cavity, and a third installation cavity is provided inside the sleeve, and the pull-out rod is located in the third installation cavity of the sleeve; the third installation cavity is installed with a third elastic reset member for driving the pull-out rod to move upward.

[0014] As a preferred solution, the valve core is provided with a mounting ring groove for mounting the first sealing ring.

[0015] As a preferred solution, the lower end of the valve body is provided with a first connecting thread for connecting to the waterproof shell, and the upper end of the valve body is provided with a second connecting thread for connecting to the sealing cover.

[0016] As a preferred solution, the first elastic return member, the second elastic return member and the third elastic return member are all springs.

[0017] As a preferred solution, the sealing member includes a circular base and a convex portion located above the circular base.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the valve body and the valve core can be pulled and moved, and a sealing ring is provided between the valve body and the valve core. Furthermore, when the valve core is pulled out, external air can directly enter the waterproof shell from the gap between the valve core and the valve body. Compared with the existing waterproof shell vacuum valve, the air intake channel is simpler, which is more conducive to factory production and ensures the reliability of air intake.

[0019] Secondly, by specifically configuring the seal, the sealing effect of the seal can be ensured, further preventing the problem of air intake in the waterproof housing underwater.

[0020] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is an exploded schematic diagram of an embodiment of the utility model;

[0023] Figure 3 A cross-sectional schematic diagram of an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of exhaust according to an embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the air intake of an embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the sealing member in the embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of the application of an embodiment of the utility model.

[0028] Description of the accompanying drawings:

[0029] 10. Valve body; 11. Limiting step; 12. First elastic reset member; 13. First sealing ring; 14. Limiting rod; 15. First installation cavity; 20. Valve core; 21. Airway opening; 22. Sealing member; 221. Circular base; 222. Protrusion; 23. Mounting ring groove; 24. Limiting plate; 25. Second elastic reset member; 30. Pull-out rod; 31. Vent hole; 32. Limiting hole; 40. Sleeve; 41. Third elastic reset member; 50. Waterproof shell; 60. Sealing cover. DETAILED DESCRIPTION

[0030] The following will provide a clear and complete description of the technical solutions in the present embodiment of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] See attached Figures 1 to 7 In the embodiment of the utility model, a pull-out type mechanical vacuum valve for a waterproof shell includes a valve body 10 for connecting with a waterproof shell 50, a valve core 20 installed in the valve body 10, a sleeve 40 installed on the valve core 20, and a pull-out rod 30 installed on the sleeve 40. The valve body 10 has a first installation cavity 15 that passes through from top to bottom, the valve core 20 has a second installation cavity that passes through from top to bottom, the valve core 20 can be installed in the first installation cavity 15 in a vertically movable manner, the sleeve 40 has a third installation cavity that passes through from top to bottom, and the pull-out rod 30 can be installed in the third installation cavity in a vertically movable manner;

[0034] The third installation cavity is connected to the second installation cavity to form an exhaust passage. The pull rod 30 has an air vent 31 extending vertically therethrough. The air vent 31 is connected to the exhaust passage. The valve core 20 has an airway opening 21 , and a sealing member 22 is provided above the airway opening 21 .

[0035] The valve body 10 has a limiting step 11, and a first elastic reset member 12 for pushing the valve core 20 to reset downward is arranged below the limiting step 11. The first installation cavity 15 is provided with a first sealing ring 13 above the limiting step 11, and the first sealing ring 13 is located between the valve core 20 and the inner side wall of the valve body 10. The valve core 20 is preferably provided with a mounting ring groove 23 for mounting the first sealing ring 13. It can be supplemented that the limiting step 11 can prevent the valve core 20 from detaching from the valve body 10. Usually, the lower end of the valve core 20 is detachably connected to a limiting disk 24, and the limiting disk 24 is adapted to the limiting step 11; thereby facilitating the installation of the valve core 20 and also serving the purpose of preventing detachment.

[0036] Here, it should be noted that this embodiment is only a preferred embodiment of the utility model. It should be understood that in actual use, the pull-out rod 30 can also be omitted, and the sleeve 40 can be directly connected to the vacuum pump to achieve the air extraction (vacuuming) operation. The main function of the pull-out rod 30 is to facilitate the user to extract the valve core 20, so that the air pressure in the waterproof shell 50 is balanced with the outside.

[0037] Furthermore, the valve core 20 is provided with a limiting rod 14, and the pull-out rod 30 has a limiting hole 32 adapted to the limiting rod 14, and the limiting hole 32 is a strip extending in the up and down directions; in this way, by setting the limiting rod 14 and the limiting hole 32, the displacement stroke of the pull-out rod 30 can be controlled; at the same time, the limiting rod 14 installs and fixes the sleeve 40 and the valve core 20 together.

[0038] Furthermore, a second elastic reset member 25 is installed below the sleeve 40 to drive the seal 22 to cover the airway opening 21; that is, the seal 22 is pressed against the airway opening by the second elastic reset member 25 (in actual application, the seal 22 will also cover the airway opening 21 due to the pressure, and the second elastic reset member 25 also serves to further ensure the stable operation of the seal 22). Preferably, the lower end surface of the sleeve 40 is provided with an annular groove for facilitating the positioning of the second elastic reset member 25.

[0039] In this embodiment, the sealing member 22 includes a circular base 221 and a convex portion 222 located above the circular base 221. The circular base 221 is integrally formed with a positioning groove for positioning the second elastic return member 25; the second spring return member 25 (spring) is sleeved on the periphery of the convex portion 222, and the bottom of the second spring return member 25 abuts against the positioning groove.

[0040] Preferably, a sleeve 40 is also included, and the sleeve 40 is installed in the second installation cavity. The sleeve 40 has a third installation cavity, and the pull-out rod 30 is located in the third installation cavity of the sleeve 40; the third installation cavity is installed with a third elastic reset member 41 for driving the pull-out rod 30 to move upward; through the setting of the third elastic reset member 41, when the sealing cover 60 is opened, the pull-out rod 30 can be slightly moved upward, further facilitating the user's air intake operation.

[0041] Further, the lower end of the valve body 10 is provided with a first connection thread for connecting to the waterproof shell 50, and the upper end of the valve body 10 is provided with a second connection thread for connecting to the sealing cover 60. Generally, the first elastic reset member 12, the second elastic reset member 25, and the third elastic reset member 41 are all springs.

[0042] like Figure 4 As shown, when the waterproof shell 50 needs to be evacuated, the sealing cover 60 is unscrewed. At this time, under the action of the third elastic reset member 41, the pull-out rod 30 moves upward a certain distance; then, the upper end of the valve body 10 is connected to the air outlet, and at this time, the air outlet presses the pull-out rod 30 downward back to the position shown in FIG. Figure 4 The initial position shown in FIG. 1 is shown in FIG. 1 , and the air extraction channel of the air extraction cylinder is connected to the air vent 31. When the air extraction cylinder is extracting air, the sealing member 22 is pushed upward due to the negative pressure. At this time, the air flow in the waterproof housing 50 is as follows: Figure 4 The gas flow direction shown is sucked away by the vacuum pump. After the vacuum work is completed, the vacuum pump is removed. At this time, due to the pressure inside and outside the second elastic reset member 25 and the waterproof shell 50, the sealing member 22 is tightly pressed against the airway opening.

[0043] like Figure 5 As shown, when the waterproof shell 50 is in a vacuum and needs to be aired, the sealing cover 60 is unscrewed. At this time, under the action of the third elastic reset member 41, the pull-out rod 30 moves upward a certain distance; then, the pull-out rod 30 is directly lifted upward. At this time, under the action of the limiting rod 14 and the limiting hole 32, the entire valve core 20 is lifted upward, so that there is a gap between the valve core 20 and the valve body 10. Since the waterproof shell 50 is in a vacuum and there is an air pressure difference with the outside world, the external gas can enter the waterproof shell 50 from the gap.

[0044] The design focus of the utility model is that the valve body and the valve core can be pulled and moved, and a sealing ring is provided between the valve body and the valve core. Furthermore, when the valve core is pulled out, external air can directly enter the waterproof shell from the gap between the valve core and the valve body. Compared with the existing waterproof shell vacuum valve, the air intake channel is simpler, which is more conducive to factory production and ensures the reliability of air intake.

[0045] Secondly, by specifically configuring the seal, the sealing effect of the seal can be ensured, further preventing the problem of air intake in the waterproof housing underwater.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pull-out mechanical vacuum valve for a waterproof shell, characterized in that: The valve body comprises a valve core and a sleeve, wherein the valve body has a first installation cavity which is vertically connected, the valve core has a second installation cavity which is vertically connected, and the sleeve has a third installation cavity; the valve core can be vertically movably installed in the first installation cavity, the sleeve is installed in the second installation cavity, the third installation cavity is a vertically connected through cavity, and the third installation cavity is connected to the second installation cavity to form an air extraction channel; The first installation cavity has a limiting step, a first elastic reset member for pushing the valve core to reset downward is arranged below the limiting step, and a first sealing ring is arranged above the limiting step in the first installation cavity, and the first sealing ring is located between the valve core and the inner side wall of the valve body; Furthermore, the valve core has an airway opening, and a sealing member is arranged at the airway opening.

2. A pull-out mechanical vacuum valve for a waterproof housing according to claim 1, characterized in that: It also includes a pull-out rod, which is installed in the third installation cavity; the pull-out rod has an air vent that passes through from top to bottom, and the air vent is connected to the air extraction channel. When extracting air, the pull-out rod is used to connect with the air pump.

3. A pull-out mechanical vacuum valve for a waterproof housing according to claim 2, characterized in that: The valve core is provided with a limiting rod, and the pulling rod has a limiting hole adapted to the limiting rod, and the limiting hole is in the shape of a strip extending in the up-down direction.

4. A pull-out mechanical vacuum valve for a waterproof housing according to claim 3, characterized in that: A second elastic reset element for driving the sealing element to cover the airway opening is installed in the second installation cavity below the sleeve.

5. A pull-out mechanical vacuum valve for a waterproof housing according to claim 4, characterized in that: The third installation cavity is provided with a third elastic reset member for driving the pull rod to move upward.

6. A pull-out mechanical vacuum valve for a waterproof housing according to claim 5, characterized in that: The valve core is provided with a mounting ring groove for mounting the first sealing ring.

7. A pull-out mechanical vacuum valve for a waterproof housing according to claim 6, characterized in that: The lower end of the valve body is provided with a first connecting thread for connecting to the waterproof shell, and the upper end of the valve body is provided with a second connecting thread for connecting to the sealing cover.

8. The pull-out mechanical vacuum valve for a waterproof housing according to claim 7, characterized in that: The first elastic return member, the second elastic return member and the third elastic return member are all springs.

9. A pull-out mechanical vacuum valve for a waterproof housing according to claim 8, characterized in that: The sealing component comprises a circular base and a convex portion located above the circular base.

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