CN212290817U

CN212290817U - Folding anti-cracking structure for opening and closing plastic box body

Info

Publication number: CN212290817U
Application number: CN202020899989.5U
Authority: CN
Inventors: 郭越先; 吴得旺
Original assignee: TAIDEXING PRECISION ELECTRONIC (KUNSHAN) CO Ltd
Current assignee: TAIDEXING PRECISION ELECTRONIC (KUNSHAN) CO Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-01-05
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses an opening-closing folding anti-cracking structure of a plastic box body, which comprises an upper cover, a lower cover which is correspondingly and rotatably buckled with the upper cover, and an integrally formed and bendable connecting strip which is arranged at the joint of the upper cover and the lower cover; the connecting strip comprises transition areas and abrupt change areas, wherein the transition areas are respectively connected with the side edge of the upper cover and the side edge of the lower cover, the abrupt change areas are connected with the two transition areas in gradual change stretching, and the thickness of each transition area is larger than that of each abrupt change area. The utility model discloses a box body opens and shuts the stress dispersion of the department of bending, difficult fracture.

Description

Folding anti-cracking structure for opening and closing plastic box body

Technical Field

The utility model belongs to the technical field of plastics, especially, relate to a folding structure of preventing ftractureing opens and shuts of plastics box body.

Background

The existing plastic products use fiber adding materials, are relatively fragile, and are easy to break at the bending part in the opening and closing process of the box body; the rotation is usually guaranteed by matching of the rotating shaft and the plug pin, assembly parts are increased, the cost is increased, and labor is consumed in assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem, and provide the folding structure of preventing ftractureing that opens and shuts of plastics box body to realize the box body and open and shut the stress dispersion of department of bending, difficult fracture. In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the plastic box body is an opening-closing folding anti-cracking structure and comprises an upper cover, a lower cover and a connecting strip, wherein the lower cover is correspondingly and rotatably buckled with the upper cover, and the connecting strip is arranged at the joint of the upper cover and the lower cover and is integrally formed and can be bent; the connecting strip comprises transition areas and abrupt change areas, wherein the transition areas are respectively connected with the side edge of the upper cover and the side edge of the lower cover, the abrupt change areas are connected with the two transition areas in gradual change stretching, and the thickness of each transition area is larger than that of each abrupt change area.

Specifically, the transition region comprises a first transition part and a second transition part, wherein the first transition part is connected with the upper cover or the lower cover and has the same thickness, the second transition part extends from the upper surface and the lower surface of the first transition part to the center and retracts inwards, and the second transition part extends to the abrupt change region.

Specifically, the upper surface in sudden change region is connected the second transition portion and is the arc structure, the lower surface in sudden change region is connected the second transition portion and is the trapezium structure.

Specifically, the transition region comprises a third transition part which is bent from thick to thin and is connected with the upper cover or the lower cover, and a fourth transition part which is raised and extended from the third transition part with the same thickness; the two fourth transition parts are extended and connected with the mutation areas to form an arch structure.

Specifically, the thickness of the mutation region is 0.33-0.35 mm.

Specifically, the two ends of the connecting strip are sunken in the connecting position of the upper cover and the lower cover to form an arc-shaped sunken area.

Specifically, the circumference side of upper cover is equipped with a plurality of fasteners that have the bayonet socket, the circumference side of lower cover is equipped with a plurality of fasteners that correspond the lock with the fastener.

Specifically, the inside of upper cover and lower cover all is equipped with the fixed muscle that is the grid structure.

Compared with the prior art, the utility model discloses the beneficial effect of folding anti-cracking structure of opening and shutting of plastic box body mainly embodies:

the connecting strip is arranged at the joint of the upper cover and the lower cover, so that the stress is dispersed during bending, the joint is not easy to break during bending, and the stress is uniform; the central line is positioned in the mutation area after bending and does not deviate too much so as to determine the stability of the position after bending, so that the fastener and the clamping piece of the box body are accurately aligned and assembled; avoid using extra spare part equipment box body, reduce product cost.

Drawings

FIG. 1 is a schematic view of a reverse structure of a box body according to an embodiment of the present invention;

FIG. 2 is a schematic front view of the case of the present embodiment;

FIG. 3 is a schematic structural diagram of a connecting bar in the present embodiment;

FIG. 4 is a schematic side view of an end face of the connecting strip in the present embodiment;

FIG. 5 is a second schematic view of the connecting strip structure of the present embodiment;

FIG. 6 is a second schematic side view of the end face of the connecting bar in the present embodiment;

the figures in the drawings represent:

1 upper cover, 11 fasteners, 2 lower covers, 21 fasteners, 3 connecting strips, 31 recessed areas, 4 abrupt change areas, 5 first transition parts, 51 second transition parts, 6 fixing ribs, 7 third transition parts and 71 fourth transition parts.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments.

Example 1:

referring to fig. 1-4, the present embodiment is an opening-closing folding anti-cracking structure of a plastic box, which includes an upper cover 1, a lower cover 2 rotatably fastened to the upper cover 1, and a connecting strip 3 integrally formed at the joint of the upper cover 1 and the lower cover 2 and capable of being bent; the connecting strip 3 comprises transition regions respectively connecting the side edge of the upper cover 1 and the side edge of the lower cover 2 and a gradually-stretched mutation region 4 connecting the two transition regions, and the thickness of the transition regions is greater than that of the mutation region 4.

The transition region comprises a first transition part 5 which is connected with the upper cover 1 or the lower cover 2 and has the same thickness, and a second transition part 51 which extends from the upper surface and the lower surface of the first transition part 5 to the center and retracts inwards, the second transition part 51 extends to the mutation region 5, the upper surface of the mutation region 5 is connected with the second transition part 51 and is of an arc structure, and the lower surface of the mutation region 4 is connected with the second transition part 51 and is of a trapezoid structure.

The thickness of the mutation region 4 is 0.33-0.35 mm.

The two ends of the connecting strip 3 are sunk at the joint of the upper cover 1 and the lower cover 2 and form an arc-shaped sunken area 31.

The circumferential side edge of the upper cover 1 is provided with a plurality of fasteners 11 with bayonets, and the circumferential side edge of the lower cover 2 is provided with a plurality of fasteners 21 correspondingly buckled with the fasteners 11. The box body is formed by the upper cover 1 and the lower cover 2 in the embodiment, the box body is made of PBT or PC materials and has certain elasticity, and the clamping piece 21 is pressed to slide into the fastening piece 11 with the bayonet to realize the closing of the box body.

The inner parts of the upper cover 1 and the lower cover 2 are both provided with fixing ribs 6 which are of grid structures and used for positioning objects in the box body.

Example 2:

referring to fig. 1-2 and 5-6, the difference from embodiment 1 is that: the specific configuration of the transition region is another variation.

The transition region comprises a third transition part 7 which is bent from thick to thin and is connected with the upper cover 1 or the lower cover 2, and a fourth transition part 71 which is raised and extended from the third transition part 7 with the same thickness; the two fourth transition portions 71 extend and connect the mutation regions to form an arch structure.

When the embodiment is applied, the connecting strip 3 is arranged at the joint of the upper cover 1 and the lower cover 2, so that the stress is dispersed during bending, the joint is not easy to break during bending, and the stress is uniform; the central line is positioned in the mutation area 4 after bending and does not deviate too much so as to determine the stability of the position after bending, so that the fastener 11 and the clamping piece 21 of the box body are accurately aligned and assembled; avoid using extra spare part equipment box body, reduce product cost.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The folding structure of preventing ftractureing that opens and shuts of plastics box body, its characterized in that: comprises an upper cover, a lower cover which is correspondingly and rotatably buckled with the upper cover, and a connecting strip which is arranged at the joint of the upper cover and the lower cover and is integrally formed and can be bent; the connecting strip comprises transition areas and abrupt change areas, wherein the transition areas are respectively connected with the side edge of the upper cover and the side edge of the lower cover, the abrupt change areas are connected with the two transition areas in gradual change stretching, and the thickness of each transition area is larger than that of each abrupt change area.

2. The opening and closing folding anti-cracking structure of the plastic box body according to claim 1, characterized in that: the transition region comprises a first transition part which is connected with the upper cover or the lower cover and has the same thickness, and a second transition part which extends inwards from the upper surface and the lower surface of the first transition part to the center and is retracted inwards, and the second transition part extends to the abrupt change region.

3. The opening and closing folding anti-cracking structure of the plastic box body according to claim 2, characterized in that: the upper surface of sudden change region is connected the second transition portion and is the arc structure, the lower surface of sudden change region is connected the second transition portion and is the trapezium structure.

4. The opening and closing folding anti-cracking structure of the plastic box body according to claim 1, characterized in that: the transition region comprises a third transition part which is bent from thick to thin and is connected with the upper cover or the lower cover, and a fourth transition part which is raised and extended from the third transition part with the same thickness; the two fourth transition parts are extended and connected with the mutation areas to form an arch structure.

5. The opening and closing folding anti-cracking structure of the plastic box body according to claim 1, characterized in that: the thickness of the mutation area is 0.33-0.35 mm.

6. The plastic box body opening-closing folding anti-cracking structure according to any one of claims 1-5, characterized in that: the two ends of the connecting strip are sunken in the joint of the upper cover and the lower cover and are arc-shaped sunken areas.

7. The opening and closing folding anti-cracking structure of the plastic box body according to claim 1, characterized in that: the circumference side of upper cover is equipped with a plurality of fasteners that have the bayonet socket, the circumference side of lower cover is equipped with a plurality of fasteners that correspond the lock with the fastener.

8. The opening and closing folding anti-cracking structure of the plastic box body according to claim 1, characterized in that: the inside of upper cover and lower cover all is equipped with the fixed muscle that is the grid structure.