Carton with fastening structure

A carton with fastening structure includes an inner box including an inner case body, an outer case cover including an outer cover body sheltering inner case body, and an elastic fastening part fixed inside the inner case body. The outer cover body includes an opening providing the inner case body to slide in. The outer cover body slips relative to the inner case body to shelter the inner cover body at a closed position. The elastic fastening part includes a shifting part. Each of the outer cover body and the inner case body includes an outer through-hole and an inner through-hole, respectively. The shifting part includes a fastening position, where the shifting part passes through the outer through-hole and the inner through-hole when the outer cover body is at the closed position, and a retracted position, where the shifting part does not pass through the outer through-hole and the inner through-hole.

FIELD OF THE INVENTION

The present invention is related to a carton, particularly to a childproofing structure of carton.

BACKGROUND OF THE INVENTION

Cartons are commonly used for packing and preserving products, such as tobaccos and etc., due to environmentally-friendly, recyclable, elegant, water vapor absorbing features and so on. For example, U.S. Pat. No. 5,707,004 “CARTON WITH OFFSET LOCK” and U.S. Pat. No. 7,959,060 B2 “MULTI-PLY CARTON HAVING RECLOSABLE OPENING FEATURE” disclose two types of cartons with different structures and are used for depositing articles, such as tobaccos, foodstuffs and etc.

In each of the two conventional types of carton structure, a reclosable lid and a latch blocking the lid are designed, respectively, for the reusability of the carton. Thereby, the lid being opened at will due to gravity or inertial force is avoided. The purpose of the latch as described above is only fixation of the lid. For children, especially children of younger age, the lid is still opened by exerting children's strength, because unblocking the latch and opening the lid are emerged in the same direction. That is, the conventional carton structure didn't have a preventive effect upon being unintentionally opened by children. In other words, it is possible for children to open the carton by themselves when adults are inattentive. If the carton is used for storing articles unsuitable for children, such as tobaccos the risks of mistaking by children are resulted.

SUMMARY OF THE INVENTION

It is the main object of the present invention to provide a child safety lock structure of carton, capable of preventing unintentionally opening of the carton so as to avoid the risk of misswallowing by children.

For achieving the above object, the present invention provides a carton with fastening structure including an inner box, an outer case cover, and an elastic fastening part, wherein the inner box is provided with an inner case body extending axially, the outer case cover is provided with an outer cover body sheltering the inner case body, the outer cover body is provided with an opening providing the inner case body to slide, and the outer cover body is provided with a closed position sheltering the inner case body completely through slippage relative to the inner case body. The elastic fastening part is provided with a shifting part. The elastic fastening part is fixed inside the inner case body, while the outer cover body and the inner case body are provided with an outer through-hole and an inner through-hole, respectively and correspondingly. Moreover, the shifting part is provided with a fastening position, which the shifting part passes through the outer through-hole and the inner through-hole when the outer cover body is situated at the closed position, and the shifting part is provided with a retracted position, which the shifting part without passes through the outer through-hole and the inner through-hole.

Thereby, the present invention is directed to a child safety lock of a carton formed by the shifting part passing through the outer through-hole as well as the inner through-hole and then the shifting part fastening on the outer cover body to avoid the carton being opened by children easily. Furthermore, when adults require opening the carton, the shifting part is pressed inwardly to retract the shifting part to be situated at the retracted position, and the outer cover body is then slipped relatively to the inner case body to be opened.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The detailed description and technical content of the present invention will now be described, in conjunction with drawings, as follows.

Referring toFIGS. 1, 2 and 3, the present invention is a carton with fastening structure including an inner box10, an outer case cover20, and an elastic fastening part30. The inner box10is provided with an inner case body11extending axially, and the inner case body11may be a rectangular body and includes a retrieval opening111faced upward. The inner case body11is provided for a user to store articles therein.

The outer case cover20is provided with an outer cover body21sheltering the inner case body11. The outer cover body21is provided with an opening211, which provides the inner case body11to slide into the outer cover body21, and the outer cover body21is provided with a closed position sheltering the inner case body11completely through slippage relative to the inner case body11. For the enhancement of diversity and convenience in operation, the outer cover body21further comprises another opening211A disposed at two sides of the outer case cover20, respectively, in such a way that the user is able to force the inner case body11from any one of the openings211,211A to enable the movement and then disengagement of the inner case body11relative to the outer cover body21.

The elastic fastening part30is provided with a shifting part31. The elastic fastening part30is fixed inside the inner case body11, while the outer cover body21and the inner case body11are respectively provided with an outer through-hole22and an inner through-hole12. Moreover, the shifting part31is provided with a fastening position, which the shifting part31passes through the outer through-hole22and the inner through-hole12when the outer cover body21is situated at the closed position (as illustrated inFIG. 2). Further, the shifting part31is provided with a retracted position, which the shifting part31without passes through the outer through-hole22and the inner through-hole12(as illustrated inFIG. 3). For the prevention of disengagement and shifting of the elastic fastening part30, additionally, the present invention further includes an auxiliary fixing plate50, the auxiliary fixing plate50being fixed inside the inner case body11and being provided with a notch51connecting with the elastic fastening part30to fix the elastic fastening part30through the notch51.

In practice, the elastic fastening part30further includes a fixing part32and a spring33. The shifting part31is penetrated into the fixing part32, and the shifting part31is provided with a fastening edge311fastened inside the fixing part32. Furthermore, the spring33is disposed in the fixing part32and the spring33presses the shifting part31to move outwardly up to the fastening position. Additionally, the outer through-hole22and the inner through-hole12are disposed on one side of the outer cover body21and one side of the inner case body11, respectively.

Referring toFIG. 3, a child safety lock of the carton is in an effective state without being opened by children easily, when the shifting part31is fastened to the outer cover body21by passing through the outer through-hole22and the inner through-hole12(as illustrated inFIG. 2). Furthermore, when the child safety lock is unlocked as desired, the shifting part31is pressed by a hand40of the user to retract the shifting part31to the retracted position. At the moment, the shifting part31does not pass through the outer through-hole22and doesn't fasten the outer cover body21any longer. Thereby, the inner case body11is able to be forced by the user to move relatively to the outer cover body21, such that the retrieval opening111of the inner case body11is opened.

Referring toFIG. 4, there is shown a second embodiment of the present invention. As illustrated inFIG. 4, the present invention further comprises another elastic fastening part30A including another shifting part31A, another outer through-hole22A, and another inner through-hole12A. Additionally, the two outer through-holes22,22A are disposed on two diagonal sides of the outer cover body21, while the two inner through-holes12,12A are disposed on two diagonal sides of the inner case body11. Furthermore, the two elastic fastening parts30,30A are disposed in correspondence with positions of the two outer through-holes22,22A and the two inner through-holes12,12A to form two sets of child safety locks. It is necessary for the user to press the two shifting parts31,31A of the two elastic fastening parts30,30A by the hand40at the same time to unlock the two shifting parts31,31A completely. Thus, being unintentionally opened by children is avoided assuredly.

Referring toFIG. 5further, there is shown a third embodiment of the present invention. As illustrated inFIG. 5, the elastic fastening part30is a flexible plate body34. One end of the plate body34is a fixing end341disposed inside the inner case body11, and another end of the plate body34far away from the fixing end341is provided with the shifting part31. Additionally, the outer through-hole22and the inner through-hole12are disposed on a bottom of the outer cover body21and the inner case body11, respectively. When the shifting part31is pressed by the user, the plate body34is flexed due to elasticity of the plate body34, such that the shifting part31is retracted to the retracted position.

Referring toFIG. 6further, there is shown a fourth embodiment of the present invention. As illustrated inFIG. 6, the present invention comprises another shifting part31A, another outer through-hole22A, and another inner through-hole12A. Additionally, the elastic fastening part30is a flexible U-shaped plate body35. Two ends of U-shaped plate body35respectively include a first end351and two second ends352,352A. The two second ends352,352A are bifurcated to each other, the two shifting parts31,31A are respectively extended from the two second ends352,352A, and the first end351is fixed inside the inner case body11. Further, the two outer through-holes22,22A are disposed on two sides of the outer cover body21,21A, while the two inner through-holes12,12A are disposed on two sides of the inner case body11, respectively. Similarly, when the two shifting parts31is pressed by the user, the U-shaped plate body35is flexed due to elasticity of the U-shaped plate body35, such that the two shifting parts31,31A is retracted to the retracted position.

Referring toFIG. 7further, there is shown a fifth embodiment of the present invention. As illustrated inFIG. 7, the elastic fastening part30is provided with a square frame body36. The square frame body36is disposed at a bottom of the inner case body11, and the square frame body36is snapped on inner walls of the inner case body11. In order to position the square frame body36, the square frame body36includes two fixing posts361,361A extending outward from the square frame body36. The two fixing posts361,361A are provided to be snapped on the inner walls of the inner case body11to position the square frame body36quickly.

The square frame body36is provided with an S rod37repeatedly bended. The S rod37is provided at one end thereof with the shifting part31. Additionally, the outer through-hole22and the inner through-hole12are corresponded to the shifting part31, and are disposed on the same sides of the outer cover body21and the inner case body11. When the shifting part31is compressed by the user, the S rod37is contracted due to elasticity of the S rod37, such that the shifting part31is retracted to the retracted position. For the enhancement of comfort in operation, the end of the S rod37(i.e., the shifting part31) is in form of an arc to avoid stabbing the user. Besides, as with the fourth embodiment, the present invention further comprises another elastic fastening part30A to form two sets of child safety locks for avoiding assuredly from being unintentionally opened by children.

To sum up, the present invention provides a carton with fastening structure. There are merits, as compared to the prior art, at least including:

1. A child safety lock of a carton is formed by the shifting part passing through the outer through-hole as well as the inner through-hole and then the shifting part fastening on the outer cover body to avoid the carton being opened by children easily. Furthermore, when adults require opening the carton, the shifting part is pressed inwardly to retract the shifting part to the retracted position for releasing the child safety lock, and the outer cover body is then slipped relatively to the inner case body to be opened.

2. The carton is able to comprise the two elastic fastening parts at different positions corresponding to the two outer through-holes and the two inner through-holes to form multiple child safety locks. Thus, being unintentionally opened by children may be avoided.