A vacuum bag

Abstract

The utility model discloses a vacuum bag, including bag body, sealing structure, sealing plug can axial movement be equipped with in the air exhaust channel, be used for plugging the air exhaust channel, locking assembly includes the guide slide hole of setting up in the lateral portion of mounting seat, the sliding block of sliding setting in the guide slide hole, and the tensioning member of being connected between the sliding block and sealing plug, the guide slide hole has the first locking position and the second locking position along its length direction arrangement, when the sliding block is from the first locking position and slides to the second locking position, the sliding block is locked in the second locking position, and the tensioning member is strained, thereby to sealing plug exert an axial tension that it is pulled tight and keeps in the air exhaust channel, the vacuum bag of the utility model is pulled tight after vacuumizing, and the tensioning member is strained and exerts an axial tension that keeps continuously, points to the bag outside to the sealing plug. This tension actively " pulls tight " sealing plug in the channel, and its holding force does not depend on the interference fit static friction force that is easily influenced by environment, but is provided by the stable mechanical structure.

Description

Technical Field

[0001] This utility model particularly relates to a vacuum bag. Background Technology

[0002] To improve sealing reliability, most advanced vacuum bags now employ a double-sealing structure. These products have a mounting base fixed to the bag body, with an air extraction channel communicating with the bag's internal cavity. A built-in one-way valve is located inside the air extraction channel, forming the first sealing barrier. For additional protection, a manually insertable sealing plug is located at the channel opening outside the valve. After vacuuming and confirming valve closure, this sealing plug is pushed into the channel opening, using an interference fit to form a second physical sealing barrier. The second sealing plug has the following structural problems: the sealing plug is fixed solely by static friction (interference fit) with the channel wall during insertion. Under long-term pressure, changes in ambient temperature and humidity, material creep, or transportation vibration, this friction is easily weakened, causing the sealing plug to slowly loosen, thus rendering the second sealing barrier ineffective. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a vacuum bag.

[0004] A vacuum bag includes a bag body with a cavity inside and a sealing structure on the side of the bag body. The sealing structure includes a mounting base, a sealing plug, and a locking assembly. The mounting base is fixed to the bag body and has an air extraction channel communicating with the cavity. A one-way valve is provided in the air extraction channel. The sealing plug is axially movable and fitted into the air extraction channel to block the air extraction channel. The locking assembly includes a guide hole on the side of the mounting base, a slider slidably disposed in the guide hole, and a tensioning member connecting the slider and the sealing plug. The guide hole has a first locking position and a second locking position arranged along its length. When the slider slides from the first locking position to the second locking position, the slider locks in the second locking position, and the tensioning member is tensioned, thereby applying an axial pulling force to the sealing plug to tighten and hold it in the air extraction channel.

[0005] Preferably, the guide hole is a gourd-shaped hole.

[0006] Preferably, the mounting base is integrally formed with the bag body, or is detachably connected by welding, bonding or fasteners.

[0007] Preferably, there are two sets of locking components, symmetrically arranged on both sides of the mounting base; the sliders of the two sets of locking components move synchronously and act together on the sealing plug through their respective tensioning members.

[0008] Preferably, the sealing plug has a grip portion on the side opposite to the air extraction channel that facilitates hand operation.

[0009] Compared with the prior art, the present invention has the following beneficial effects: This invention equips the sealing plug with a mechanical locking assembly (guide slide, slider, and tensioning member). After vacuuming, the sealing plug is not only pushed into the channel, but more importantly, by moving the slider to the second locking position, the tensioning member is tensioned and applies a continuous, outward-pointing axial force to the sealing plug. This force actively "tightens" the sealing plug within the channel, and its holding force does not rely on the static friction of the interference fit, which is susceptible to environmental influences, but is provided by a robust mechanical structure. Therefore, it can effectively resist the effects of long-term pressure differences, material creep, and temperature changes, ensuring the long-term effectiveness of the second sealing barrier and maintaining a stable vacuum state. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of a vacuum bag according to this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a vacuum bag according to this application. Figure 2 ; Figure 3 This is a schematic diagram of the sealing plug of this application; Figure 4 This is a schematic diagram of the sealing structure of this application. Detailed Implementation

[0012] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0013] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0014] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, welding, snap-fitting, or embedding to suitably replace the connection.

[0015] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0016] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0017] A vacuum bag includes a bag body 1 with a cavity 2 inside. A sealing structure is provided on the side of the bag body 1. The sealing structure includes a mounting base 31, a sealing plug 32, and a locking assembly. The mounting base 31 is fixed to the bag body 1 and has an air extraction channel 33 communicating with the cavity 2. A one-way valve 34 is provided within the air extraction channel 33. The sealing plug 32 is axially movable and fitted within the air extraction channel 33 to seal the air extraction channel 33. The locking assembly includes components located on the side of the mounting base 31. The guide slide hole 41, the slider 42 slidably disposed in the guide slide hole 41, and the tensioning member 43 connecting the slider 42 and the sealing plug 32; the guide slide hole 41 has a first locking position 431 and a second locking position 432 arranged along its length direction. When the slider 42 slides from the first locking position 431 to the second locking position 432, the slider 42 is locked in the second locking position 432, and the tensioning member 43 is tensioned, thereby applying an axial tensile force to the sealing plug 32 to tighten and hold it in the air extraction channel 33.

[0018] Furthermore, the guide hole 41 is a gourd-shaped hole.

[0019] Furthermore, the mounting base 31 is integrally formed with the bag body 1, or is detachably connected by welding, bonding or fasteners.

[0020] Furthermore, the locking components are provided in two sets and symmetrically arranged on both sides of the mounting base 31; the sliders 42 of the two sets of locking components move synchronously and act together on the sealing plug 32 through their respective tensioning members 43.

[0021] Furthermore, the sealing plug 32 is provided with a gripping part 5 on the side opposite to the air extraction channel 33 for easy hand operation.

[0022] This embodiment provides a basic vacuum bag. A mounting base 31 is provided on one side of the bag body 1. This mounting base 31 is a rigid plastic integral injection molded part, fixed to the bag body 1 by high-frequency welding. A cylindrical air extraction channel 33 is provided in the center of the mounting base 31, and a one-way valve 34 is provided inside. The sealing plug 32 is made of rubber, and its plug part is interference-fitted with the air extraction channel 33 to prevent gas from entering the cavity 2. The bag body 1 is made of multi-layer composite plastic film through a heat-sealing bag-making process, possessing good airtightness and flexibility. The upper end of the bag body 1 has a pre-reserved opening 1-1 for inserting or removing items. This opening 1-1 can be opened and closed and initially sealed using conventional sealing strips (such as embossed zippers), which is mature existing technology and is not shown in the figure. The locking component includes a gourd-shaped hole on the side of the mounting base 31 as a guide sliding hole 41. A plastic slider 42 is embedded in this elongated hole and can slide along it. The tensioning member 43 is hinged at one end to the slider 42 and connected to the sealing plug 32 at the other end. In use, after vacuuming, the sealing plug 32 is pushed into the channel to seal it. Then, the slider 42 slides from the guide hole 41 towards the first locking position 431 near the bag body to the second locking position 432 away from the bag body. During this process, the tensioning member 43 exerts a pulling force on the sealing plug 32, holding it tightly and effectively preventing the sealing plug from coming out.

[0023] Based on the above technical solution, two identical locking components are symmetrically arranged on the left and right sides of the mounting base 31. Specifically, each side has a linear guide hole 41 and a slider 42, each connected to the sealing plug 32 via a tensioning member 43. During operation, simply moving the slider 42 moves it towards the second locking position 432, simultaneously tightening the tensioning members 43 on both sides, applying a symmetrical and balanced pulling force to the sealing plug 32. This design ensures more even force distribution on the sealing plug 32, resulting in a more stable lock and effectively preventing misalignment and leakage of the sealing plug 32 due to unilateral force. It is particularly suitable for large vacuum bags or those requiring the ability to withstand significant internal and external pressure differences.

[0024] Based on the above technical solution, this embodiment further optimizes the ease of operation. A protruding grip portion 5 is molded at the tail end of the sealing plug 32 (i.e., the side facing away from the suction channel 33 and exposed outside the bag). This grip portion 5 is convenient for the user to hold with their fingers. When pushing the sealing plug 32 in for initial sealing, the user can directly and conveniently apply force to the grip portion 5 without needing to find a point of force, significantly improving the operating experience. Simultaneously, this protruding structure also serves as a visual and tactile marker, clearly indicating the operating position of the sealing plug 32.

[0025] This invention equips the sealing plug 32 with a mechanical locking assembly (guide slide hole 41, slider 42, and tensioning member 43). After vacuuming, the sealing plug 32 is not only pushed into the vacuum channel 33, but more importantly, by moving the slider 42 to the second locking position 432, the tensioning member 43 is tensioned and applies a continuous, outward-pointing axial force to the sealing plug 32. This force actively "tightens" the sealing plug 32 within the channel, and its holding force does not rely on the static friction of the interference fit, which is susceptible to environmental influences, but is provided by a robust mechanical structure. Therefore, it can effectively resist the effects of long-term pressure differences, material creep, and temperature changes, ensuring the long-term effectiveness of the second sealing barrier and maintaining a stable vacuum state.

[0026] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A vacuum bag, comprising a bag body (1), wherein the bag body (1) has a cavity (2) therein, characterized in that, The bag body (1) has a sealing structure on its side; the sealing structure includes a mounting base (31), a sealing plug (32), and a locking assembly; the mounting base (31) is fixed on the bag body (1) and has an air extraction channel (33) communicating with the cavity (2), and a one-way valve (34) is provided in the air extraction channel (33); the sealing plug (32) is axially movable and fitted in the air extraction channel (33) to block the air extraction channel (33); the locking assembly includes a guide sliding hole (41) opened on the side of the mounting base (31) and a guide sliding hole (41) slidably disposed on the guide. The guide slide (41) has a slider (42) inside the slide hole (41) and a tensioning member (43) connecting the slider (42) and the sealing plug (32); the guide slide hole (41) has a first locking position (431) and a second locking position (432) arranged along its length direction. When the slider (42) slides from the first locking position (431) to the second locking position (432), the slider (42) is locked in the second locking position (432), and the tensioning member (43) is tensioned, thereby applying an axial pulling force to the sealing plug (32) to pull it tight and keep it in the air extraction channel (33).

2. A vacuum bag according to claim 1, characterized in that, The guide hole (41) is a gourd-shaped hole.

3. A vacuum bag according to any one of claims 1 to 2, characterized in that, The mounting base (31) is integrally formed with the bag body (1), or is detachably connected by welding, bonding or fasteners.

4. A vacuum bag according to any one of claims 1 to 2, characterized in that, The locking components are provided in two sets and are symmetrically arranged on both sides of the mounting base (31); the sliders (42) of the two sets of locking components move synchronously and act together on the sealing plug (32) through their respective tensioning members (43).

5. A vacuum bag according to any one of claims 1 to 2, characterized in that, The sealing plug (32) has a grip (5) on the side opposite to the air extraction channel (33) for easy hand operation.

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