TWI875498B - Packaging box for easy removal and improved surface quality of contact lenses - Google Patents

Abstract

A packaging box for easy removal and improved surface quality of contact lenses is disclosed. It includes a packaging body and a flexible sealing sheet. The packaging body includes a sealing plate body and an accommodation cavity. The sealing plate body has a first side and a second side. The accommodation cavity is relatively axially symmetric to a symmetry axis and is formed in the sealing plate body from the first side to the second side to accommodate the contact lens and maintenance solution, having an inner side connected to the first side. The accommodation cavity includes a three-dimensional curved surface part and a gradient curvature part. The surface of the three-dimensional curved surface part is located on the inner side and forms a three-dimensional curved surface. The gradient curvature part is located outside the three-dimensional curved surface part. Any curve formed by the intersection of a plane passing through the symmetry axis and the inner surface is a quadratic curve, and the opening direction of the quadratic curve is not toward the symmetry axis. The flexible sealing sheet is removably fixed on the first side to seal the accommodation cavity.

Description

Packaging box that is easy to take out and improves the surface quality of contact lenses

The present invention relates to a packaging box, in particular a packaging box that is easy to take out and improves the surface quality of contact lenses.

Contact lenses go through a high-temperature sterilization process during packaging, which will come into contact with the plastic container, which can easily cause poor surface quality of the lens, leading to poor user experience for consumers. To solve this problem, contact lens manufacturers will add tic-tac-toe and multiple horizontal stripes on the container to reduce the contact area between the contact lens and the container (for details, please refer to the contact lens packaging disclosed in Johnson & Johnson's patent publication No. 200404528), thereby improving the quality of the contact lens when in use. Although this approach can improve the quality problem, it will cause the external visual appearance of the plastic container to be poor. Another solution is to apply a matte treatment on the container, which can also improve the quality of contact lens. Consumers feel that it is better than adding tic-tac-toe and multiple horizontal stripes mentioned above. However, when consumers use their fingers to take out the lens, it will be difficult to take it out, or even impossible to take it out. On the other hand, consumers use their fingers to take out contact lens, which leads to a problem: it often causes the risk of contact lens breakage.

From the above description, we can see that a good contact lens packaging box needs to have four basic functions: improving the quality of contact lens use, reducing damage caused by removing contact lenses, and having a beautiful appearance and easy-to-remove design. However, there are currently no products on the market that meet this demand.

This paragraph extracts and compiles certain features of the invention. Other features will be revealed in subsequent paragraphs. Its purpose is to cover various modifications and similar arrangements within the spirit and scope of the attached patent application.

The present invention provides a packaging box that is easy to take out and improves the surface quality of contact lenses, comprising: a packaging body, comprising: a sealing plate body, having a first side and a second side; and a receiving cavity, which is a structure symmetrical with respect to a symmetry axis, and is formed in the sealing plate body from the first side to the second side to accommodate contact lens and maintenance liquid, and has an inner side connected to the first side. , comprising: a three-dimensional curved surface portion, whose surface located on the inner side forms a three-dimensional curved surface; and a gradually changing curvature portion, located outside the three-dimensional curved surface portion, wherein any plane passing through the symmetry axis and the inner surface intersect to form a curve which is a quadratic curve, and the opening direction of the quadratic curve is not toward the symmetry axis; and a flexible sealing sheet, which is removably fixed to the first side to seal the accommodating cavity. The surface formed by the points on the inner side surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is less than a first distance has a first roughness, and all surfaces or part of the continuous surface formed by the points on the inner side surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is not less than the first distance and not greater than a second distance has a second roughness, and the first roughness is greater than the second roughness.

According to the present invention, the curvature radius of the curve formed by the intersection of the three-dimensional curved surface and any plane passing through the symmetry axis ranges from 6mm to 20mm.

According to the present invention, the first distance range is between 4mm and 9mm.

According to the present invention, the second distance range is between 5mm and 12.5mm.

According to the present invention, the point on the inner surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is equal to the second distance forms the boundary between the three-dimensional curved surface portion and the gradient curvature portion.

According to the present invention, the first roughness is greater than Ra 0.1μm but less than Ra 5.0μm.

According to the present invention, the second roughness is greater than Ra 10nm but less than Ra 3.0μm.

According to the present invention, the quadratic curve is a quadratic Bezier curve.

According to the present invention, the material of the packaging body is polypropylene (PP).

According to the present invention, the material of the flexible cover is aluminum foil.

In order to meet the above requirements, in the packaging box disclosed in the present invention, by performing various functional designs under different sections of the accommodating cavity, the quality of contact lens use can be improved, the damage caused by removing the contact lens can be reduced, and the contact lens can be easily removed. In addition, the inner surface of the three-dimensional curved surface replaces the tic-tac-toe and horizontal bar design in the known technology with different roughness. Although the material of the packaging body is transparent polypropylene, the user will only notice the different light transmittance design of the three-dimensional curved surface, without the irritation of the tic-tac-toe and horizontal bar. Therefore, the design purpose of beautiful appearance is achieved.

1: Packaging box

10:Packaging body

10’:Packaging body

11: Sealing board

111: First side

112: Second side

113: Auxiliary hole

12: Accommodating cavity

121:Inside

122: Outer side

123: Three-dimensional curved face

124: Gradual curvature section

13: Strengthen the edges

20: Flexible sealing film

d1: first distance

d2: second distance

G: Contact lens

L: Care solution

R: Radius of curvature

θ: angle of intersection

Figure 1 is a cross-sectional view of a packaging box that is easy to remove and improves the surface quality of contact lenses according to an embodiment of the present invention.

Figure 2 is a top view of a packaging body.

Figure 3 is a cross-sectional view of the packaging body.

FIG4 is a top view of a packaging body having a packaging box that is easy to take out and improves the surface quality of contact lenses according to another embodiment of the present invention.

In order to make the description of the disclosed content more detailed and complete, the following is an illustrative description of the implementation and specific embodiments of the present invention.

Please refer to FIG. 1, which is a cross-sectional view of a packaging box 1 (hereinafter referred to as packaging box) with easy removal and improved surface quality of contact lenses according to an embodiment of the present invention. The packaging box 1 includes a packaging body 10 and a flexible sealing sheet 20. The packaging body 10 is designed to accommodate contact lens G and care solution L, and is preferably made of a plastic material that is hydrophobic, heat-resistant and recyclable, such as polypropylene (PP). The packaging body 10 structure includes a sealing plate 11, a receiving cavity 12, and a reinforcing edge strip 13 surrounding the sealing plate 11. After the contact lens G and the care solution L are accommodated in the accommodation cavity 12, the flexible sealing sheet 20 is removably fixed to the first side 111 of the sealing plate 11 to seal the accommodation cavity 12 to prevent the contact lens G from falling out and/or the care solution L from leaking out. The flexible sealing sheet 20 may be made of aluminum foil, which is bonded to the first side 111 of the sealing plate 11 by hot pressing or high frequency technology when the contact lens G is packaged. Since the contact lens G is sterilized before packaging, the sealed accommodation cavity 12 maintains the quality of the contact lens G when it is used. When the contact lens G needs to be removed, the user can first tear off a corner of the flexible sealing sheet 20 (as shown by the dotted line in FIG. 1 ), and then tear off the entire flexible sealing sheet 20 from the sealing plate 11. Since the flexible sealing sheet 20 is closely combined with the sealing plate 11, it is inconvenient to tear it off. Therefore, an auxiliary hole 113 can be opened on the sealing plate 11. The user can pass a finger through the auxiliary hole 113 from the second side 112 of the sealing plate 11 (the opposite side of the first side 111) and push the flexible sealing sheet 20 upward until a clear opening of the flexible sealing sheet 20 appears.

For the detailed structural description of the package body 10, please refer to Figure 2 and Figure 3 simultaneously. Figure 2 is a top view of the package body 10, and Figure 3 is a cross-sectional view of the package body 10. The sealing plate body 11 has the aforementioned first side 111 and second side 112, and can be a flat plate itself, or it can have two stages of different thicknesses as shown in Figure 3. The accommodating recess 12 is a structure that is symmetrical relative to a symmetry axis (shown by the dotted line in Figure 3). The accommodating recess 12 extends from the sealing plate body 11, and is formed in the sealing plate body 11 from the first side 111 to the second side 112 to accommodate the contact lens G and the maintenance liquid L. As can be seen from Figure 2, the accommodating recess 12 is adjacent to the sealing plate body 11 on all sides, and there is no exposed part. In FIG. 3 , the junction of the receiving cavity 12 and the sealing plate 11 is indicated by a dotted line. For the convenience of explanation, the receiving cavity 12 has an inner side 121 connected to the first side 111 and an outer side 122 connected to the second side 112. Although the receiving cavity 12 is an axisymmetric structure in the vertical direction of the packaging body 10, the surface curvature of the inner side 121 of the receiving cavity 12 varies. According to the curvature variation, the receiving cavity 12 is divided into a three-dimensional curved surface portion 123 and a gradually changing curvature portion 124. The three-dimensional curved surface portion 123 is characterized in that its surface located on the inner side 121 forms a three-dimensional curved surface. Since the inner side 121 and the outer side 122 are of equal thickness, the surface of the outer side 122 is also a three-dimensional curved surface. The shape of the three-dimensional curved surface is not limited. In this embodiment, it is a spherical surface with a curvature center falling on the aforementioned symmetry axis. For the convenience of explanation, the inside of the circle dashed frame in FIG. 2 is the three-dimensional curved surface 123, and the portion of the receiving cavity 12 below the dotted dashed line in FIG. 3 is the three-dimensional curved surface 123. In addition, the asterisk position is the curvature center, and the length of the two ends of the double arrow solid line segment is the curvature radius R corresponding to the curvature center. According to the present invention, the curvature radius of the curve formed by the intersection of the three-dimensional curved surface and any plane passing through the symmetry axis ranges from 6 mm to 20 mm. Therefore, in this embodiment, the radius of curvature R can have different sizes considering the appearance and size of the contact lens G, and the radius of curvature can also range from 6 mm to 20 mm, but the radius of curvature is fixed. The gradually curvature portion 124 is located outside the three-dimensional curved surface portion 123. In FIG. 2 , the gradually curvature portion 124 is located between the circular dashed frame and the dotted circular dashed frame; in FIG. 3 , the gradually curvature portion 124 is indicated by a circular dashed frame and is enlarged at the top. According to the present invention, in the gradually curvature portion 124, the curve formed by the intersection of any plane passing through the axis of symmetry and the surface of the inner side 121 is a quadratic curve. Since the receiving cavity 12 is an axisymmetric structure, the quadratic curve is the curve drawn by the gradually changing curvature portion 124 in FIG. 3. In this embodiment, the quadratic curve is a quadratic Bezier curve. It can also be seen from FIG. 3 that the opening direction of the aforementioned quadratic curve (the direction indicated by the hollow arrow in FIG. 3) is not toward the axis of symmetry, that is, the curve formed by the intersection of the plane passing through the axis of symmetry and the surface of the inner side 121 has different bending directions in the three-dimensional curved surface portion 123 and the gradually changing curvature portion 124.

To further explain, the inner side 121 of the three-dimensional curved surface portion 123 has different surface treatments (roughness) according to the distance between its surface and the symmetry axis, which is to reduce the problem of poor lens surface quality caused by the contact lens G contacting the plastic material receiving cavity 12. According to the present invention, the surface formed by the points on the surface of the inner side 121 of the three-dimensional curved surface portion 123 whose shortest distance from the symmetry axis is less than a first distance has a first roughness. Since the receiving cavity 12 is axially symmetrical with respect to the symmetry axis, and the distance between any point on the inner side 121 surface of the three-dimensional curved surface portion 123 and the symmetry axis increases from the bottom to the top of the symmetry axis, the points on the inner side 121 surface of the three-dimensional curved surface portion 123 that are at the same distance from the symmetry axis are all at the same height around the symmetry axis. When the length of the double-arrow dashed line segment in FIG. 3 is set as the first distance d1, all the inner side 121 surfaces of the three-dimensional curved surface portion 123 below the plane where the double-arrow dashed line segment is located meet the above definition and have the first roughness. In practice, the first distance range can be between 4 mm and 9 mm, and the first roughness is greater than Ra 0.1 μm but less than Ra 5.0 μm. The surface with the first roughness can be produced by mass manufacturing technologies such as injection molding, vacuum molding, and stamping, while the surface roughness of the mold can be produced by processing technologies such as EDM, ultra-precision machining, chemical etching, and sandblasting.

On the other hand, all surfaces formed by points on the surface of the inner side 121 of the three-dimensional curved surface portion 123 whose shortest distance from the symmetry axis is not less than the first distance d1 and not greater than a second distance have a second roughness, and the first roughness is greater than the second roughness. In FIG. 3 , the length of the double-arrow dotted line segment above the double-arrow dotted line segment is the second distance d2. All surfaces of the inner side 121 of the three-dimensional curved surface portion 123 above the plane where the double-arrow dotted line segment is located and below the plane where the double-arrow dotted line segment is located meet the above definition and have a second roughness. In practice, the second distance d2 can range from 5 mm to 12.5 mm (relatively, the first distance d1 is shorter), and the second roughness is greater than Ra 10 nm but less than Ra 3.0 μm. It should be emphasized that although the first roughness and the second roughness ranges that can be used in the present invention overlap, in practice the first roughness used must be greater than the second roughness used. The surface with the second roughness can be produced by mass manufacturing techniques such as injection molding, vacuum molding, and stamping, and the surface roughness of the mold produced can be produced by processing techniques such as manual polishing and mirror grinding. Preferably, the range covered by the second roughness surface is the area remaining after removing the first roughness surface from the inner side 121 of the three-dimensional curved surface 123, so the point on the surface of the inner side 121 of the three-dimensional curved surface 123 whose shortest distance from the symmetry axis is equal to the second distance d2 forms the boundary between the three-dimensional curved surface 123 and the gradient curvature portion 124.

As can be seen from the above description, the three-dimensional curved surface below the inner side 121 of the three-dimensional curved portion 123 is rougher than the annular surface above it. When the user uses fingers to take the contact lens G out of the accommodating cavity 12, the surface of the contact lens G will be close to the smoother annular surface of the inner side 121 of the three-dimensional curved portion 123, and the contact lens G will be subject to less resistance and will not be easily scratched. At the same time, since the surface bending direction of the inner side 121 of the gradually curved portion 124 is different from that of the inner side 121 of the three-dimensional curved portion 123, the contact lens G can be inertially removed from the accommodating cavity 12 by the force applied by the finger after leaving the inner side 121 of the three-dimensional curved portion 123. This is a design that makes it easy to remove the contact lens G and prevents the contact lens G from being further worn and broken. In addition, the surface of the inner side 121 of the three-dimensional curved surface 123 replaces the well-shaped and horizontal stripes in the conventional technology with different roughness (although the present invention does not limit the surface treatment method of the outer side 122, it is a smooth surface in the embodiment). Although the material of the packaging body 10 is transparent polypropylene, the user will only notice the different light transmittance design of the three-dimensional curved surface 123, and will not feel the discomfort of the well-shaped and horizontal stripes. Therefore, the purpose of aesthetic design is achieved.

Compared with the existing contact lens cases, the product of this embodiment has the advantage of higher efficiency in removing contact lens. For proof, please see the following comparative example and embodiment. The comparative example and the embodiment are carried out in the same environment, using the same contact lens with a water content of 38% and soaked in 0.9% physiological saline water in the contact lens container. The test conditions are: the user uses the tip of the index finger to remove the lens from the contact lens container. The first time the lens is removed, the score is 5 points, the second time the lens is removed, the score is 4 points, and so on, until the fourth time the score is 0 points, and failure to remove the lens is also 0 points. The number of testers is 30. The embodiment is a package with a curvature radius of 12.5 mm, a first distance of 7 mm, a second distance of 10 mm, a first roughness Ra of 0.85 μm, and a second roughness Ra of 0.05 μm. Comparative example 1 is Biomedics ^TM 1 Day Extra from CooperVision, and comparative example 2 is ACUVUE ^TM Moist ^TM 1 Day from Johnson & Johnson. The test data are shown in the following table.

As can be seen from the above table, the packaging design of the present invention has the advantage of being more efficient in removing contact lens lenses than similar products on the market.

In addition to the aforementioned implementations, the present invention also has other variations. As previously mentioned, all surfaces formed by points on the surface of the inner side 121 of the three-dimensional curved surface portion 123 whose shortest distance between the symmetry axes is not less than the first distance d1 and not greater than the second distance d2 have a second roughness. However, not all surfaces are required, and partially continuous surfaces are also acceptable. In this regard, please see Figure 4, which is a top view of a packaging body 10' of a packaging box according to another embodiment of the present invention. Most of the technical elements of the packaging body 10' are the same as the packaging body 10 of the previous embodiment. The same symbols in Figure 4 as in Figure 2 represent the same elements, and their technical features are no longer repeated. Compared with Figure 2, the part with the second roughness shown in Figure 4 only has an arc-shaped area with a black dot bottom (partially continuous spherical surface), rather than a complete annular surface. In this embodiment, the aforementioned arc-shaped area is 1/4 of the complete annular surface, that is, the angle θ in FIG4 is about 90 degrees; in other embodiments, the angle θ can also be other angles, such as any angle between 90 degrees and 270 degrees. According to the present invention, the roughness of the surface of the incomplete annular surface excluding the arc-shaped area is greater than the second roughness, and the first roughness can be used in the manufacturing process. When the user takes out the contact lens, he must pass through the inner surface 121 of the second roughness to avoid scratching the contact lens.

Although the present invention has been disclosed in the form of implementation as above, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of the patent application attached hereto.

1: Packaging box

10:Packaging body

11: Sealing board

111: First side

112: Second side

113: Auxiliary hole

12: Accommodating cavity

13: Strengthen the edges

20: Flexible sealing film

G: Contact lens

L: Care solution

Claims (9)

A packaging box with the function of easy removal and improved surface quality of contact lenses, comprising: a packaging body, comprising: a sealing plate body, having a first side and a second side; and a containing cavity, which is a structure symmetrical with respect to a symmetry axis, and is formed in the sealing plate body from the first side to the second side to contain contact lenses and maintenance liquid, and has an inner side connected to the first side, comprising: a three-dimensional curved surface portion, the surface of which is located on the inner side forms a three-dimensional curved surface; and a gradually changing curvature portion, which is located outside the three-dimensional curved surface portion, and the curve formed by the intersection of any plane passing through the symmetry axis and the surface of the inner side is a quadratic curve, and the opening direction of the quadratic curve is not toward the symmetry axis; and a flexible sealing sheet, which can be removably fixed to the first side to seal the accommodating cavity, wherein the surface formed by the points on the inner side surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is less than a first distance has a first roughness, and all surfaces or part of the continuous surface formed by the points on the inner side surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is not less than the first distance and not greater than a second distance have a second roughness, the first roughness is greater than the second roughness, and the points on the inner side surface of the three-dimensional curved surface portion whose shortest distance from the symmetry axis is equal to the second distance form the boundary between the three-dimensional curved surface portion and the gradual curvature portion. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the curvature radius of the curve formed by the intersection of the three-dimensional curved surface and any plane passing through the symmetry axis ranges from 6mm to 20mm. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the first distance ranges from 4mm to 9mm. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the second distance range is between 5mm and 12.5mm. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the first roughness is greater than Ra 0.1μm but less than Ra 5.0μm. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the second roughness is greater than Ra 10nm but less than Ra 3.0μm. The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the quadratic curve is a quadratic Betz curve. As described in claim 1, the packaging box has the function of easy removal and improved surface quality of contact lenses, wherein the material of the packaging body is polypropylene (PP). The packaging box with easy removal and improved surface quality of contact lenses as described in claim 1, wherein the material of the flexible sealing sheet is aluminum foil.