A moisture-proof packaging carton

Abstract

The utility model discloses a kind of moisture-proof packaging carton, belong to packaging technical field, including carton body, by the support frame being arranged in the support mechanism of carton body inside, and install on the air-permeable mechanism of carton body lateral wall, the air-permeable mechanism includes support fixed in carton inner wall, baffle and spring, waterproof air-permeable membrane is fixed in baffle inside, outer wall is fixed with connecting block, the connecting block slidingly engages in the clamping groove of paper box wall, and the spring is elastically abutted between support and baffle.This utility model solves the problem that carton is softened and deformed after being damp, ensures the structural stability, and balances the air pressure inside and outside through air-permeable mechanism, prevents the condensate water vapor inside, and moisture-proof effect is good, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a moisture-proof packaging carton. Background Technology

[0002] Cardboard boxes are the most widely used packaging containers in modern logistics and transportation, favored for their low cost, lightweight nature, and ease of recycling. However, traditional corrugated cardboard boxes, made of paper, inherently suffer from poor moisture resistance. When exposed to rain, high humidity, or liquid leaks, the box easily absorbs moisture, causing its structural strength to rapidly decline, softening, deforming, or even breaking, thus failing to provide effective protection for the contents.

[0003] To address these issues, some existing technologies involve adding a waterproof membrane or coating to the surface of traditional cardboard boxes to create moisture-proof cartons. While this method can prevent direct penetration of external liquid water to some extent, protecting the contents from moisture, this external waterproofing measure cannot prevent the corrugated cardboard layer itself from absorbing moisture from the environment or becoming wet from rain. The overall structural strength of the carton will still be significantly reduced due to moisture. During stacking or transport, these softened cartons are highly susceptible to collapse, which can also endanger the safety of the contents.

[0004] Furthermore, even with completely sealed waterproof measures, new technical challenges arise. When packaging cartons experience significant temperature or air pressure changes, a pressure difference forms between the sealed interior and exterior. This pressure difference can not only cause the carton to bulge or collapse, but more importantly, temperature changes can easily cause moisture in the air inside the carton to condense into water droplets on the inner walls. This internally generated moisture cannot be prevented by the external waterproof layer and poses a fatal risk to items that are extremely sensitive to humidity, such as electronic products and precision instruments.

[0005] Therefore, this utility model proposes a moisture-proof packaging carton to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a moisture-proof packaging carton, which aims to improve the problems in the prior art where the structural strength of the carton decreases and it is prone to collapse after the carton gets damp, and the temperature difference between the inside and outside of the carton easily leads to the condensation of water vapor inside the carton.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a moisture-proof packaging carton, comprising a carton body and a support mechanism detachably disposed inside the carton body, the moisture-proof packaging carton further comprising a ventilating mechanism installed at the mounting through hole of the carton body; The core structure of the ventilation mechanism includes a support, a baffle, and a spring; Furthermore, the bracket is fixedly connected to the inner wall of the carton body, a waterproof and breathable membrane for covering the installation through hole is fixedly fixed on the inner side of the baffle, a connecting block is fixedly connected to the outer wall of the baffle, and a slot is opened on the wall of the carton body corresponding to the position of the connecting block. The connecting block connects the baffle to the carton body by sliding and engaging in the slot. The two ends of the spring are supported by elastically abutting against the inner side of the bracket and the baffle. Preferably, the carton body is composed of a corrugated paper layer, an adhesive layer, and a waterproof layer stacked sequentially from the outside to the inside, and the waterproof layer is fixed to the inner wall of the corrugated paper layer by the adhesive layer; Preferably, the support frame of the support mechanism is a cubic frame that matches the internal contour of the carton body; Preferably, the support frame of the support mechanism and the bracket of the ventilation mechanism are spaced apart from each other; Preferably, the spring is a compression spring, and the spring force acts on the baffle from the inside to the outside to drive the connecting block to fit tightly against the groove wall of the slot; Preferably, the slot is a dovetail groove structure, and the connecting block is a dovetail block adapted to the dovetail groove structure; Preferably, the bracket is a U-shaped bracket, and one end of the spring abuts against the concave sidewall of the U-shaped bracket; Preferably, the connecting block is integrally formed on the outer wall of the baffle.

[0008] This utility model has the following beneficial effects: 1. This utility model solves the problem of reduced compressive strength and easy collapse of existing packaging cartons due to softening of the carton body after being exposed to moisture by setting a support mechanism composed of a support frame inside the carton body, thus achieving the effect of maintaining high structural stability and protective ability in humid environments.

[0009] 2. This utility model solves the problem of condensation inside traditional waterproof cardboard boxes due to the inability to balance internal and external air pressure and temperature differences by setting a breathable mechanism with an integrated waterproof and breathable membrane on the cardboard box body. It achieves active regulation of humidity inside the box and prevents internal dampness, thereby achieving a higher level of moisture protection.

[0010] 3. This utility model solves the problems of limited functionality and insufficient structural reliability of existing moisture-proof solutions by combining the internal support mechanism with the ventilation mechanism installed by spring snap-fit, thus achieving the effect of stable structure, comprehensive function and easy assembly. Attached Figure Description

[0011] Figure 1This is a perspective view of a moisture-proof packaging carton proposed in this utility model; Figure 2 Exploded view of the ventilation mechanism of a moisture-proof packaging carton proposed in this utility model; Figure 3 This is a schematic diagram of the support frame structure of a moisture-proof packaging carton proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of a moisture-proof packaging carton proposed in this utility model.

[0012] Legend: 1. Carton body; 101. Corrugated paper layer; 102. Adhesive layer; 103. Waterproof layer; 2. Support mechanism; 201. Support frame; 3. Ventilation mechanism; 301. Bracket; 302. Slot; 303. Baffle; 304. Connecting block; 305. Spring; 306. Waterproof and breathable membrane. Detailed Implementation

[0013] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Reference Figures 1-4 An embodiment of this utility model is provided: a moisture-proof packaging carton, including a carton body 1, a support mechanism 2 composed of a support frame 201 is detachably provided inside the carton body 1, an installation through hole is opened on the side wall of the carton body 1, and a ventilation mechanism 3 is installed at the installation through hole. Specifically, the ventilation mechanism 3 includes a bracket 301, a baffle 303, and a spring 305. The bracket 301 is fixedly connected to the inner wall of the carton body 1 by adhesive or snap-fit, serving as the fixed base point for the entire ventilation mechanism 3 inside the carton. A waterproof and breathable membrane 306 is fixed to the inner surface of the baffle 303. In the installed state, the waterproof and breathable membrane 306 is positioned directly opposite to and completely covers the mounting through hole on the carton body 1. To install the baffle 303 on the carton body 1, a connecting block 304 is fixedly connected to the outer wall of the baffle 303. At the same time, the wall of the carton body 1... A slot 302 is provided at the position corresponding to the connecting block 304. During installation, the connecting block 304 slides and engages with the inside of the slot 302 along the extension direction of the slot 302, thereby connecting the baffle 303 with the carton body 1. To ensure the stability and sealing of the connection, the two ends of the spring 305 elastically abut against the side of the bracket 301 facing the baffle 303 and the inner side of the baffle 303, respectively. The continuous thrust generated by the spring 305 makes the baffle 303 tightly pressed against the side wall of the carton body 1, thereby ensuring the tight fit between the waterproof and breathable membrane 306 and the edge of the mounting through hole. To achieve a stable and detachable connection between the baffle 303 and the carton body 1, the slot 302 is specifically a dovetail groove structure. Correspondingly, the connecting block 304 fixed to the outer wall of the baffle 303 is a dovetail block adapted to the dovetail groove structure. The connecting block 304 is integrally formed on the outer wall of the baffle 303 to enhance the structural strength. When installing the ventilation mechanism 3, the connecting block 304 can slide smoothly into the groove of the dovetail groove structure. This matching method not only guides the installation path of the baffle 303, but also effectively resists the pulling force from the inside of the carton body 1 after installation, preventing the baffle 303 from falling out. Spring 305 provides a continuous locking force for the connection. Specifically, it is a compression spring, and the spring force of the compression spring acts on the baffle 303 from the inside out, thereby continuously driving the side wall of the connecting block 304 to fit tightly against the groove wall of the slot 302, eliminating the connection gap and ensuring the firmness of the installation. The bracket 301, which provides reaction force support for spring 305, has a U-shaped structure. The end of spring 305 away from baffle 303 is stably abutted against the concave side wall of the U-shaped bracket. The structure of the U-shaped bracket provides a stable support surface for spring 305. The support mechanism 2 inside the carton body 1 has a support frame 201 that is specifically a cubic frame that matches the internal contour of the carton body 1. This cubic frame can provide comprehensive structural support for the four side walls, top, and bottom of the carton body 1 at the same time, thereby maintaining the overall geometry and load-bearing capacity when the carton body 1 becomes damp and softened. In terms of position, the support frame 201 and the bracket 301 of the ventilation mechanism 3 are spaced apart from each other to avoid structural interference between the two components during installation and use. The cardboard box body 1, which serves as the moisture-proof base, has a wall structure consisting of a corrugated paper layer 101, an adhesive layer 102, and a waterproof layer 103 stacked sequentially from the outside to the inside. The waterproof layer 103 is firmly fixed to the inner wall of the corrugated paper layer 101 through the adhesive layer 102. As the innermost layer, the waterproof layer 103 directly blocks external moisture from penetrating into the interior of the cardboard box body 1. The wall of the carton body 1 adopts a composite layer structure. Specifically, the carton body 1 is composed of a corrugated paper layer 101, an adhesive layer 102 and a waterproof layer 103 stacked from the outside to the inside. The waterproof layer 103 is firmly laid on the entire inner wall surface of the corrugated paper layer 101 through the adhesive layer 102, forming a complete waterproof barrier. The support frame 201 is a cubic frame that matches the internal contour of the carton body 1. The size of this cubic frame allows it to fit tightly against the inner wall of the carton body 1 after being inserted, thus providing uniform and comprehensive support. To ensure no spatial interference between components after installation, the support frame 201 and the bracket 301 of the ventilation mechanism 3 are spaced apart inside the carton body 1, with a safety gap between them. The spring 305 is a compression spring, and the spring force is set to act on the baffle 303 from the inside out. This force application method can... The connecting block 304 is continuously driven to fit tightly against the groove wall of the slot 302, achieving a self-locking effect. The cross-sectional shape of the slot 302 is a dovetail groove structure. At the same time, the connecting block 304 is correspondingly set as a dovetail block adapted to the dovetail groove structure. The connecting block 304 is integrally formed on the outer wall of the baffle 303. This dovetail fit structure has the characteristic of preventing pull-out, ensuring the reliability of the connection. The bracket 301 is specifically shaped as a U-shaped bracket. One end of the spring 305 is stably abutted against the concave side wall of the U-shaped bracket. The two wings of the U-shaped bracket can be fixed to the inner wall of the carton body 1 by adhesive or riveting.

[0015] Working principle: During packaging and transportation, the carton body 1, composed of corrugated paper layer 101, adhesive layer 102 and waterproof layer 103, provides basic protection. The innermost waterproof layer 103 can effectively prevent liquid water or high humidity moisture in the external environment from penetrating into the carton, protecting the contents from moisture. When the carton body 1, especially the outer corrugated paper layer 101, becomes soft and loses strength due to prolonged exposure to a humid environment, the support mechanism 2 set inside the carton body 1 begins to play a key role. The support frame 201, as a rigid skeleton, provides strong internal support for the carton body 1, maintains the geometry and load-bearing capacity of the carton, and prevents collapse or deformation caused by softening of the carton. Meanwhile, the ventilation mechanism 3 installed on the side wall of the carton body 1 is responsible for regulating the microenvironment inside the carton. When changes in external temperature or altitude cause a pressure difference between the inside and outside of the carton, air can circulate through the waterproof and breathable membrane 306 to balance the internal and external air pressure, preventing the carton from absorbing moisture due to negative pressure or condensing water droplets on the inner wall due to the temperature difference between the inside and outside. The microporous structure of the waterproof and breathable membrane 306 allows gas molecules to pass through while preventing liquid water molecules from entering, achieving a one-way breathable moisture-proof function. The entire ventilation mechanism 3 is firmly installed on the carton body 1 through the sliding engagement of the connecting block 304 and the slot 302, and under the continuous elastic pushing force of the spring 305. The bracket 301 provides a stable reaction force fulcrum for the spring 305, ensuring the overall stability and sealing of the ventilation mechanism 3.

Claims

1. A moisture-proof packaging carton, comprising: The carton body (1) has a support mechanism (2) consisting of a support frame (201) detachably installed inside it, and the side wall of the carton body (1) has an installation through hole. Its characteristic is that it further includes: A ventilation mechanism (3) is installed at the installation through hole. The ventilation mechanism (3) includes a bracket (301), a baffle (303), and a spring (305). The bracket (301) is fixedly connected to the inner wall of the carton body (1). A waterproof and breathable membrane (306) for covering the installation through hole is fixed on the inner side of the baffle (303). A connecting block (304) is fixedly connected to the outer wall of the baffle (303). A slot (302) is opened on the wall of the carton body (1) corresponding to the position of the connecting block (304). The connecting block (304) slides and engages in the slot (302). The two ends of the spring (305) elastically abut against the inner side of the bracket (301) and the baffle (303).

2. The moisture-proof packaging carton according to claim 1, characterized in that: The carton body (1) is composed of a corrugated paper layer (101), an adhesive layer (102) and a waterproof layer (103) stacked sequentially from the outside to the inside. The waterproof layer (103) is fixed to the inner wall of the corrugated paper layer (101) by the adhesive layer (102).

3. The moisture-proof packaging carton according to claim 1, characterized in that: The support frame (201) is a cubic frame that matches the internal contour of the carton body (1).

4. The moisture-proof packaging carton according to claim 1, characterized in that: The support frame (201) and the bracket (301) of the ventilation mechanism (3) are spaced apart from each other.

5. The moisture-proof packaging carton according to claim 1, characterized in that: The spring (305) is a compression spring, and the spring force of the spring (305) acts on the baffle (303) from the inside to the outside, so as to drive the connecting block (304) to fit tightly against the groove wall of the slot (302).

6. The moisture-proof packaging carton according to claim 1, characterized in that: The slot (302) is a dovetail groove structure, and the connecting block (304) is a dovetail block adapted to the dovetail groove structure.

7. The moisture-proof packaging carton according to claim 1, characterized in that: The bracket (301) is a U-shaped bracket, and one end of the spring (305) abuts against the concave sidewall of the U-shaped bracket.

8. The moisture-proof packaging carton according to claim 1, characterized in that: The connecting block (304) is integrally formed on the outer wall of the baffle (303).

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