Knob cover with check valve and rotation stopping structure

Abstract

The utility model discloses a knob cover with check valve and rotation -stopping structure belongs to gas -liquid storage technical field, including screw cap, the inside of screw cap is provided with screw buckle, and the valve cover is clamped on screw buckle, and the inside of valve cover is provided with mounting seat, and the spring is provided on mounting seat, and the key is connected to the top of spring, after the assembly of screw cap, screw buckle and valve cover, the top of key is in contact with the inner wall top of screw cap, and the multiple wedge blocks are arranged in the inner wall top of screw cap, and the multiple ratchet claws that are adapted with wedge block are set up on the top of screw buckle, and the internal thread for installing in the inner side of screw buckle is set up, the utility model discloses, and the rotation -stopping function of knob cover is realized through the cooperation of ratchet claw and wedge block, effectively prevent the damage of thread or difficult opening caused by overtightening, utilize tower spring and plug rod structure and realize automatic pressure relief, and the use safety and convenience are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid storage technology, specifically a knob cover with a check valve and an anti-rotation structure. Background Technology

[0002] The knob cap is used to seal the liquid storage bottle. It is opened and closed by a threaded connection to achieve sealed storage of the liquid.

[0003] The above-mentioned technical conditions also have defects: the existing knob cap is easy to be too loose or too tight when tightened on the bottle. Especially for some liquid products, an overly loose seal may lead to leakage, while an overly tight seal will make it difficult for users to open the bottle cap.

[0004] Based on this, this utility model designs a knob cover with a check valve and an anti-rotation structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a knob cover with a check valve and an anti-rotation structure to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a knob cap with a check valve and an anti-rotation structure, comprising a knob cap, a snap fastener inside the knob cap, a valve cap snapped onto the snap fastener, a mounting seat inside the valve cap, a spring on the mounting seat, and a button connected to the top of the spring. After the knob cap, snap fastener, and valve cap are assembled, the top of the button abuts against the top of the inner wall of the knob cap. Multiple wedges are arranged in a ring on the top of the inner wall of the knob cap, and multiple pawls adapted to the wedges are provided on the top of the snap fastener. An internal thread for mounting on the bottle mouth is provided on the inner side of the snap fastener.

[0007] By adopting the above technical solution, the cap and the screw fastener achieve unidirectional transmission through the cooperation of the wedge and the pawl, which effectively prevents the cap from being too tight and avoids damage to the threads.

[0008] Preferably, the button has a vent hole inside, a tower spring is provided on the mounting base and inside the spring, a plug rod is connected to the tower spring, a small sealing ring and a pressure ring are coaxially arranged inside the mounting base, and a middle sealing ring is also provided at the bottom of the mounting base. The middle sealing ring, pressure ring and small sealing ring are all installed inside the valve cover, and the plug rod passes through the small sealing ring and pressure ring in sequence.

[0009] By adopting the above technical solution, the cooperation between the tower spring and the stopper rod, as well as the setting of the vent hole, realizes the automatic release of internal pressure and improves the safety of use.

[0010] Preferably, the button is also fixedly connected to multiple contact blocks.

[0011] By adopting the above technical solution, the contact block design increases the friction between the button and the inner wall of the cap, ensuring unobstructed exhaust passage.

[0012] Preferably, the valve cover is fixedly connected with multiple claws.

[0013] By adopting the above technical solution, the claw makes the connection between the valve cover and the screw thread more secure, thus improving the stability of the overall structure.

[0014] Preferably, the inner side of the screw cap is provided with multiple locking blocks.

[0015] By adopting the above technical solution, the snap-fit ​​block further enhances the connection strength between the cap and the buckle, preventing the components from loosening.

[0016] Preferably, a large sealing ring is provided on the inner side of the swivel and above the internal thread.

[0017] By adopting the above technical solution, the large sealing ring improves the sealing performance between the knob cap and the bottle mouth, preventing liquid leakage.

[0018] Preferably, a label is also provided on the top of the screw cap.

[0019] By adopting the above technical solutions, OEM provides users with an identification area, enhancing the aesthetics and practicality of the product.

[0020] In summary, this application has the following beneficial technical effects: the ratchet and wedge block cooperation realizes the anti-rotation function of the knob cover, effectively preventing thread damage or opening difficulties caused by over-tightening; the tower spring and plug rod structure realize automatic pressure relief, significantly improving the safety and convenience of use; the setting of multiple sealing rings ensures good sealing performance and avoids liquid leakage; the overall structure is compact, easy to assemble, and has high practicality and reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram showing the overall structure of this embodiment. Figure 2 This is a schematic diagram of the button structure in this embodiment; Figure 3 This is a schematic cross-sectional view of the mounting base in this embodiment; Figure 4This is a schematic diagram of the screw cap structure in this embodiment; Figure 5 This is a schematic diagram of the screw fastener structure in this embodiment; Figure 6 This is a schematic diagram of the valve cover in this embodiment.

[0023] The attached diagram lists the components represented by each number as follows: 1. Screw cap; 2. Screw fastener; 3. Valve cover; 4. Mounting base; 5. Spring; 6. Button; 7. Large sealing ring; 8. Label; 9. Vent hole; 10. Contact block; 11. Plug rod; 12. Tower spring; 13. Middle sealing ring; 14. Small sealing ring; 15. Pressure ring; 16. Wedge block; 17. Snap-fit ​​block; 18. Pawl; 19. Internal thread; 20. Clamping claw. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] A knob cover with a check valve and an anti-rotation structure includes a knob cover 1, a latch 2 inside the knob cover 1, a valve cover 3 snapped onto the latch 2, a mounting base 4 inside the valve cover 3, a spring 5 on the mounting base 4, and a button 6 connected to the top of the spring 5. After the knob cover 1, latch 2, and valve cover 3 are assembled, the top of the button 6 abuts against the top of the inner wall of the knob cover 1. Multiple wedges 16 are arranged in a ring on the top of the inner wall of the knob cover 1, and multiple pawls 18 that match the wedges 16 are provided on the top of the latch 2, forming a multi-segment arc-shaped locking structure, similar in principle to a ratchet and pawl. When the knob cover 1 rotates forward, the wedges... Under the influence of the small contact force between the wedge 16 and the pawl 18 and the elastic force of the spring 5, the clasp 2 can rotate with the cap 1. The inner side of the clasp 2 is provided with an internal thread 19 for installation at the bottle mouth. When the clasp 2 rotates forward, the entire cap can be installed at the bottle mouth. After the cap is locked, when the cap 1 continues to rotate forward, the resistance force of the thread is greater than the contact force between the wedge 16 and the pawl 18 plus the elastic force of the spring 5, so the clasp 2 will not be driven to continue rotating, thus preventing the threads of the internal thread 19 from being damaged by force. When the cap 1 is rotated in reverse, the wedge 16 and the pawl 18 engage with each other, thereby driving the clasp 2 to rotate and opening the cap.

[0027] Furthermore, a vent hole 9 is provided inside the button 6. A conical spring 12 is provided on the mounting base 4 and inside the spring 5. The conical spring 12 is a type of conical spring with a top diameter smaller than the bottom diameter. A stopper rod 11 is connected to the conical spring 12. A small sealing ring 14 and a pressure ring 15 are coaxially arranged inside the mounting base 4. A middle sealing ring 13 is also provided at the bottom of the mounting base 4. The middle sealing ring 13, the pressure ring 15, and the small sealing ring 14 are all installed inside the valve cover 3. At the same time, the stopper rod 11 passes through the small sealing ring 14 and the pressure ring 15 in sequence. Under the action of air pressure, the stopper rod 11 can move upward, thereby stretching the conical spring 12. At this time, the gas can be discharged upward through the small sealing ring 14 and the pressure ring 15, and then enter the gap between the cap 1 and the screw fastener 2 through the vent hole 9, thereby being discharged to the outside of the bottle, thus depressurizing the inside of the bottle.

[0028] Furthermore, multiple contact blocks 10 are fixedly connected to the button 6. The contact blocks 10 can improve the contact effect between the button 6 and the cap 1, increase the friction, and at the same time leave space between the contact hole 9 and the cap 1 to improve the exhaust and pressure relief effect.

[0029] Furthermore, multiple claws 20 are fixedly connected to the valve cover 3, and the claws 20 are used to connect the valve cover 3 to the inside of the buckle 2.

[0030] Furthermore, multiple snap-fit ​​blocks 17 are provided on the inner side of the cap 1, which are used to snap the protrusions on the buckle 2.

[0031] Furthermore, a large sealing ring 7 is provided on the inside of the screw 2 and above the internal thread 9, which is used to increase the sealing performance of the connection with the bottle mouth.

[0032] Furthermore, a label 8 is provided on the top of the screw cap 1 for attaching markings.

[0033] Furthermore, all plastic parts are molded from high-strength, high-temperature resistant, acid and alkali resistant PA66+30%GF, and the sealing rings are all made of rubber.

[0034] The implementation principle of this embodiment is as follows: When the cap 1 is rotated forward, the wedge 16 engages with the pawl 18, driving the screw 2 to rotate, so that the internal thread 19 is fastened to the bottle mouth; when the cap 1 is tightened and the cap 1 continues to rotate, the pawl 18 and the wedge 16 slip out, avoiding damage to the thread due to excessive tightness. When the internal air pressure increases, the air pressure pushes the stopper rod 11 to move upward, stretching the tower spring 12. The gas escapes through the gap between the small sealing ring 14 and the pressure ring 15, and then is discharged through the vent hole 9, realizing automatic pressure relief. When opening, the cap 1 is rotated in reverse, the wedge 16 and the pawl 18 are locked, driving the screw 2 to rotate synchronously, thereby easily opening the bottle cap.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A knob cover with a check valve and an anti-rotation structure, comprising a knob cover (1), characterized in that: The screw cap (1) has a screw buckle (2) inside, and a valve cover (3) is snapped onto the screw buckle (2). A mounting seat (4) is provided inside the valve cover (3). A spring (5) is provided on the mounting seat (4). A button (6) is connected to the top of the spring (5). After the screw cap (1), screw buckle (2) and valve cover (3) are assembled, the top of the button (6) abuts against the top of the inner wall of the screw cap (1). Multiple wedges (16) are arranged in a ring on the top of the inner wall of the screw cap (1). Multiple pawls (18) that are adapted to the wedges (16) are provided on the top of the screw buckle (2). An internal thread (19) for installation on the bottle mouth is provided on the inner side of the screw buckle (2).

2. A knob cover with a check valve and an anti-rotation structure according to claim 1, characterized in that: The button (6) has a vent hole (9) inside. A tower spring (12) is provided on the mounting base (4) and inside the spring (5). A stopper rod (11) is connected to the tower spring (12). A small sealing ring (14) and a pressure ring (15) are coaxially arranged inside the mounting base (4). A middle sealing ring (13) is also provided at the bottom of the mounting base (4). The middle sealing ring (13), the pressure ring (15) and the small sealing ring (14) are all installed inside the valve cover (3). At the same time, the stopper rod (11) passes through the small sealing ring (14) and the pressure ring (15) in sequence.

3. A knob cover with a check valve and an anti-rotation structure according to claim 1 or 2, characterized in that: Multiple contact blocks (10) are also fixedly connected to the button (6).

4. A knob cover with a check valve and an anti-rotation structure according to claim 1, characterized in that: Multiple claws (20) are fixedly connected to the valve cover (3).

5. A knob cover with a check valve and an anti-rotation structure according to claim 1, characterized in that: The inner side of the screw cap (1) is provided with multiple snap-fit ​​blocks (17).

6. A knob cover with a check valve and an anti-rotation structure according to claim 1, characterized in that: A large sealing ring (7) is provided on the inner side of the swivel (2) and above the internal thread (9).

7. A knob cover with a check valve and an anti-rotation structure according to claim 1, characterized in that: The top of the screw cap (1) is also provided with a label (8).

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