Hinge cap

Abstract

To provide a hinged cap that transforms into a form including a part that serves as a flange by a pushing operation from the outside when in use.SOLUTION: A hinged cap comprises: a cap body 2 with a spout 12; and a top lid 20 connected to the cap body 2 via a hinge 18. The upper lid 20 has a cylinder peripheral wall 26 hanging down from a peripheral end of the top plate 22. The hinge 18 is arranged on a base end e1 side in one cylinder radial direction X of the upper lid 20. On the cylinder peripheral wall 26, a thin-walled deformation part 30, which is located on a tip e2 side in the cylinder radial direction X and is made by punching out the inner side of the cylinder peripheral wall 26. The thin-walled deformation part 30 is formed in a rectangular shape when viewed from the cylinder radial direction X and is arranged adjacent to the top plate, and by pressing in the thin-walled deformation part 30, an upper half 30a of the thin-walled deformation part 30 is deformed into an undercut shape that is recessed more inward as going away from the top plate 22 when viewed from a side Y orthogonal to the cylinder radial direction X.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hinge cap, and more particularly to a hinge cap for attachment to a container body. [Background technology]

[0002] One known example of this type of cap is a hinged cap, in which a topped cylindrical cap body having a spout on its top surface is connected to a top lid that covers the top surface of the cap body via a hinge (Patent Document 1). The peripheral surfaces of the cap body and the top lid are flush with each other. To facilitate the lid opening operation, the top end of the front surface of the top lid protrudes forward to form a flange for a finger hook. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2003-292004 Summary of the Invention [Problem to be solved by the invention]

[0004] The hinge cap in Patent Document 1 was opened by hooking a finger on the flange, but there was a demand for a sleek design without a flange for appearance reasons. Also, there was a risk that the flange might come into contact with the cap and cause it to open when stored in a bag or the like.

[0005] An object of the present invention is to provide a hinge cap that, instead of omitting the flange from the conventional configuration, can be transformed into a configuration that includes a portion that serves as a substitute for the flange when pressed from the outside during use. [Means for solving the problem]

[0006] The first means includes a cap body 2 that is attached to the neck portion 102 of the container body 100 and has a spout 12; The cap body 2 is connected to the top cover 20 via a hinge 18. A hinge cap comprising: The upper cover 20 has a cylindrical peripheral wall 26 hanging down from the peripheral edge of the top plate 22, The hinge 18 is disposed on the base end e1 side of the upper cover 20 in the cylindrical diameter direction X, In addition, the cylindrical peripheral wall 26 is formed with a thin-walled deformed portion 30, which is located on the side of the tip e2 in the cylindrical radial direction X and is formed by removing material from the inner side of the cylindrical peripheral wall 26, This thin-walled deformed portion 30 is The thin-walled deformation portion 30 is formed thinner than the remaining portion of the cylindrical peripheral wall 26, with a pair of side ends 36 of the thin-walled deformation portion 30 as boundaries, and When pressed from the outside, it deforms into a concave shape for finger placement.

[0007] In this method, as shown in Figure 1(A), the hinge cap consists of a cap body 2 that is attached to the mouth and neck portion 102 of the container body 100 and has a spout 12, and an upper lid 20 that is connected to this cap body 2 via a hinge 18. The top cover 20 has a cylindrical peripheral wall 26 hanging down from the peripheral edge of the top plate 22. The cylindrical peripheral wall 26 is formed with a thin-walled deformed portion 30 located on the front end e2 side in the cylindrical radial direction X, the thin-walled deformed portion 30 being formed by removing material from the inner side of the cylindrical peripheral wall 26. This thin-walled deformed portion 30 is The thin-walled deformed portion 30 is formed thinner than the remaining portion of the cylindrical peripheral wall 26, with a pair of side ends 36 as the boundary. Also The thin-walled deformable portion 30 is deformed into a concave shape for hanging a finger when pressed from the outside. According to this structure, the user can place his / her finger on the recessed portion to open the lid instead of using the flange. Furthermore, unless the user intentionally presses the thin, deformed portion, it will not form a recess for a finger hook, so there is little risk of the lid opening due to contact with other stored items while stored in a bag or the like.

[0008] The second means comprises the first means; and The thin-walled deformation portion 30 is disposed adjacent to the top plate 22, By pushing this thin-walled deformation portion 30, when viewed from a side Y perpendicular to the cylindrical diameter direction X, the upper half 30a of the thin-walled deformation portion 30 is deformed into an undercut shape that is recessed inward as it moves away from the top plate 22.

[0009] In this embodiment, the thin-walled deformation portion 30 is disposed adjacent to the top plate 22 as shown in FIG. 1(A), and the upper cover 20 has a cylindrical peripheral wall 26 hanging down from the peripheral edge of the top plate 22. By pushing in this thin-walled deformation portion 30, as shown in Figure 3(B), when viewed from the side Y perpendicular to the cylindrical diameter direction X, the upper half 30a of the thin-walled deformation portion 30 is deformed into an undercut shape that is recessed inward as it moves away from the top plate 22. With this structure, the user can place his or her fingers on the undercut portion instead of the flange to open the lid.

[0010] The third means has the first means or the second means, and the thin-walled deformation portion 30 extends to the lower edge L of the cylindrical peripheral wall 26, and the lower end portion 34 of the thin-walled deformation portion 30 can be displaced inward as the thin-walled deformation portion 30 is pushed in.

[0011] In this means, as shown in Figure 1(A), the thin-walled deformation portion 30 extends to the lower edge L of the cylindrical peripheral wall 26, and the lower end portion 34 of the thin-walled deformation portion 30 can be displaced inward as the thin-walled deformation portion 30 is pushed in. According to this structure, the lower end 34 of the thin-walled deformed portion 30 is allowed to displace to a certain extent, so that the thin-walled deformed portion 30 has a higher degree of freedom in deformation, and can reliably function as a flange substitute portion.

[0012] The fourth means includes the third means, and the cap body 2 includes an attachment tube 3 for attachment to the outer surface of the mouth / neck portion 102 of the container body 100; The mounting cylinder 3 has a top plate 4 connected thereto. An outward step 9 is formed on the upper surface of the top plate 4, positioned inside the thin-walled deformed portion 30, to restrict the thin-walled deformed portion 30 from deforming inward.

[0013] In this means, as shown in Figure 1(A), the cap body 2 has an attachment tube 3 for attachment to the outer surface of the mouth and neck portion 102 of the container body 100, and a top plate 4 connected to the attachment tube 3 and having a planar shape that matches the outline of the upper cover 20.On the upper surface of the top plate 4, an outward step portion 9 is formed, positioned inside the thin-walled deformation portion 30, to restrict inward deformation of the thin-walled deformation portion 30, as shown in Figure 3(A). This structure reduces the risk of the thin-walled deformed portion 30 being damaged when the user presses the thin-walled deformed portion 30 excessively or when another object collides with the thin-walled deformed portion 30.

[0014] The fifth means includes the fourth means, and the cylindrical peripheral wall 26 has a tip half wall portion 26b farther from the hinge 18 extending downward longer than a base half wall portion 26a close to the hinge 18, A portion of the top plate 4 adjacent to the front half wall portion 26b is recessed, and a gap V is formed above this recessed portion 8 into which the thin-walled deformed portion 30 is pushed.

[0015] In this embodiment, as shown in FIG. 1B, the cylindrical peripheral wall 26 has a front half wall portion 26b extending downward from the hinge 18 longer than a base half wall portion 26a close to the hinge 18. The top plate 4 has a recessed portion adjacent to the front half wall portion 26b, and above this recessed portion 8 there is formed a gap V into which the thin-walled deformed portion 30 is pushed. According to this structure, the gap V is used as a pressing allowance for the thin-walled deformed portion 30, so that the operation of pressing the thin-walled deformed portion 30 can be carried out without any trouble.

[0016] The sixth means has the first means, and the outer peripheral surface of the cap body 2 is configured so that, when viewed from above, it is flush with the outer surface of the portion of the cylindrical peripheral wall 26 where the thin-walled deformation portion 30 is formed, or protrudes outward in the cylindrical diameter direction from the outer surface of that portion.

[0017] In this means, the positional relationship between the cap body 2 and the location of the thin-walled deformed portion of the cylindrical peripheral wall 26 is limited. That is, when viewed from above, the outer peripheral surface of the cap body 2 is flush with the outer surface of the portion of the cylindrical peripheral wall 26 where the thin-walled deformation portion 30 is formed (see Figures 2(A) and 1(A)), or is configured to protrude radially outward from the outer surface of that portion, although this is not shown. [Effects of the Invention]

[0018] According to the present invention, the flange is omitted from the conventional configuration to provide a streamlined shape, and when in use, the configuration can be transformed into one that includes a portion that serves as a substitute for the flange by pressing in from the outside. [Brief explanation of the drawings]

[0019] [Figure 1] 1A and 1B are diagrams showing the structure of a hinge cap according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a side view. [Figure 2] 2A and 2B are views of the hinge cap shown in FIG. 1 as viewed from another direction, with FIG. 2A being a plan view and FIG. 2B being a rear view. [Figure 3] 2A and 2B show the structure and function of the main part (thin-walled deformed part) of the hinge cap shown in FIG. 1, where FIG. 2A is an enlarged cross-sectional view showing the thin-walled deformed part, and FIG. 2B is a view showing the state in which the thin-walled deformed part is pressed in. BEST MODE FOR CARRYING OUT THE INVENTION

[0020] 1 to 3 show a hinge cap according to an embodiment of the present invention. This hinge cap is composed of a cap body 2 and an upper cover 20. Each of these components can be made of, for example, a synthetic resin material.

[0021] The cap body 2 has an attachment tube 3 for attachment to the mouth and neck portion 102 of the container body 100, and a top plate 4 connected to the top of this attachment tube 3 has a pouring outlet 12 opening inside the attachment tube 3 when viewed from above.

[0022] In this embodiment, the top plate 4 is circular when viewed from above and has a larger diameter than the mounting tube 3, and an outer peripheral wall 16 is suspended from the outer peripheral edge of the top plate 4. A tube peripheral wall 26, which will be described later, is connected to the upper part of this outer peripheral wall 16 via hinges 18. Also, outer wall 1 6 Between the mounting tube 3 and the mounting tube 4, a reinforcing wall R is provided as shown in FIG. 1(A). As shown in FIG. 3(A), the top plate 4 of this embodiment has an annular inner peripheral portion 6 and an outer peripheral portion 7, with the mounting tube 3 as the boundary, and a pouring tube 11 stands up from the inner edge of the inner peripheral portion 6. A pouring outlet 12 is opened at the upper end of the pouring cylinder 11. The outer peripheral portion 7 is connected to the outer peripheral wall 16 . However, in the illustrated example, the outer peripheral portion 7 is recessed on the side opposite the hinge 18 relative to the remaining top plate portion 10 via a step shown by a dotted line in Figure 3(A) (a step relative to the step portion 28 of the cylindrical peripheral wall described below), forming a recessed portion 8. The area where the depression 8 is formed as viewed from the side is shown in FIG. 3(B), and the planar shape of the depression 8 is shown by the dotted line in FIG. 2(A). These shapes can be modified as appropriate. For example, the recessed portion 8 may be gradually lowered from the hinge side to the opposite side of the hinge, and the cylindrical peripheral wall 26 may be formed to correspondingly become gradually longer from the hinge side to the opposite side of the hinge. The remaining top plate portion 10 of the outer peripheral portion 7 near the hinge is formed at approximately the same height as the inner peripheral portion 6. The upper surface of the recess 8 in the illustrated example is formed as a gentle slope that slopes downward and outward from its upper edge 8a to its lower edge 8b, although this shape can be modified as appropriate. An outward step 9 is formed on the outer side of the recess 8, close to a lower end 34 of a thin-walled deformed portion 30 (described later). This outward step 9 is intended to restrict the amount of displacement of the lower end 34 of the thin-walled deformed portion 30 (described later) when the thin-walled deformed portion 30 is pressed in from the outside, as described later. However, these structures can be modified as appropriate. For example, the recessed portion may be omitted and the top plate 4 may be a single ring-shaped plate. An outer peripheral wall that also serves as a mounting tube may be suspended from the outer peripheral edge of the ring-shaped plate.

[0023] The upper cover 20 has a cylindrical peripheral wall 26 hanging down from the peripheral edge of a top plate 22 facing the top plate 4, and this cylindrical peripheral wall 26 is connected to the hinge 18. A stopper tube 24 is hung down from the underside of the top plate 22 and fitted onto the upper outer surface of the dispensing tube 11, and a stopper section 25 is attached to the inside of the stopper tube 24 and fitted tightly into the dispensing tube 11. In the illustrated example, the contour of the top plate 22 when viewed from above is configured to match the planar shape of the top plate 4 . The top plate 22 has a strength sufficient to allow the lid to be opened when a thin-walled deformation portion 30, which will be described later, is pushed up with a finger. The contour of the top plate 22 is arbitrary, but for the region adjacent to the thin-walled deformation portion 30 (described later) when viewed from above (the portion surrounded by arc a and line segment b in FIG. 2(A)), the contour line is set so as not to hinder the inward deformation of the thin-walled deformation portion 30. Hereinafter, this region will be referred to as the tip portion 23. As in the illustrated example, a cornerless curved shape that bulges outward gently is a suitable shape for the tip portion 23.

[0024] In the illustrated example, the outer peripheral surface of the cylindrical peripheral wall 26 is flush with the outer peripheral surface of the cap body 2 in the area where the hinge 18 is not formed, and both are formed in vertical planes. However, it is not necessary for both surfaces to be vertical. For example, if the two outer surfaces are tapered together, this is acceptable as long as the overall shape is neat. The above-described structure can be modified as appropriate. The outer peripheral surface of the cap body 2 and the outer peripheral surface of the cylindrical peripheral wall 26 do not need to be flush along the entire circumferential direction, but may be flush, for example, on the side opposite the hinge 18 or at a location along the circumferential direction where the thin-walled deformation portion 30 is formed. The outer peripheral surface of the cap body 2 may also be configured to protrude outward in the cylindrical radial direction relative to the cylindrical peripheral wall 26 over the entire circumferential direction or at the location where the thin-walled deformation portion 30 is formed. A thin-walled deformation portion 30 is formed in a portion of the circumferential direction of the cylindrical peripheral wall 26, located on the opposite side of the hinge 18. That is, as shown in FIG. 2(A), if the hinge 18 is located at one end (called the base end e1) of the cylindrical peripheral wall 26 in the cylindrical diameter direction X, the thin-walled deformation portion 30 is located at the other end (called the tip end e2) in the cylindrical diameter direction X. 1(B), the cylindrical peripheral wall 26 has a half portion (referred to as a base half-wall portion 26a) closer to the hinge, and the other half portion (referred to as a tip half-wall portion 26b) farther from the hinge that extends downward via a step portion 28. However, the step portion 28 may be omitted, and the cylindrical peripheral wall 26 may be formed so that it gradually becomes longer from the hinge side to the opposite side of the hinge. Furthermore, although the step portion 28 in the illustrated example is inclined downward toward the front, it may be formed vertically. The tip half-wall portion 26b rests on a recessed portion 8 in the outer peripheral portion 7 of the top plate 4, and the base half-wall portion 26a rests on the remaining top plate portion 10 of the outer peripheral portion 7 of the top plate 4.

[0025] The thin-walled deformation portion 30 is formed by removing weight from the inside of the cylindrical peripheral wall 26, so that it appears the same as the other parts of the cylindrical peripheral wall 26, and functions as a finger hook when pressed from the outside during the lid opening operation. That is, the thin-walled deformable portion 30 deforms into a concave shape for a finger hook at least at the pressed-in portion. In particular, the thin-walled deformed portion 30 of this embodiment deforms in a bow-like (or arc-like) shape from its upper half 30a to its lower half 30b, as shown in Figure 3(B), and the deformed surface can be used as a grip for the fingers and pushed up with the fingertips. As mentioned above, by providing a recessed portion 8 on the side of the top plate 4 opposite the hinge 18, a gap V is secured above the recessed portion 8 as a pressing allowance to allow the thin-walled deformation portion 30 to deform inward. 1(A) shows the front shape of this thin-walled deformation portion 30. However, since this figure is a half cross-sectional view, only the outline of the right half of the thin-walled deformation portion 30 is drawn by a dashed line. The front shape of the thin-walled deformed portion 30 in the illustrated example is rectangular, although this shape can be changed as appropriate. The width w of the thin-walled deformation portion 30 is designed so as to provide a sufficient pressing margin for the thin-walled deformation portion to allow a finger to be placed on it. In the illustrated example, the upper end 32 of the thin-walled deformation portion 30 is located at a height close to the lower surface of the top plate 22 . The left and right side edges 36 of the thin-walled deformation portion 30 are vertical straight lines. These side edges 36 are the boundary lines between the thick and thin portions of the cylindrical peripheral wall 26. However, for design reasons, the boundary lines are formed so that they cannot be seen from the outside. The thin-walled deformation portion 30 reaches the lower edge L of the cylindrical peripheral wall 26, and a lower end portion 34 of the thin-walled deformation portion 30 is a free end that is allowed to be displaced slightly rearward. Although it is not desirable for the lower end portion 34 to be displaced significantly, unless a certain degree of displacement is allowed, it is difficult to deform the thin-walled deformable portion 30 . Therefore, the thin-walled deformation portion 30 is made long enough to reach the lower edge L of the cylindrical peripheral wall 26, and the aforementioned outward step portion 9 is provided to restrict rearward displacement of the lower end portion 34 of the thin-walled deformation portion 30. The thin-walled deformed portion 30 has elasticity to the extent that it returns to its original shape when it is released from the inwardly pressed state.

[0026] When opening the lid using the thin-walled deforming portion 30, for example, the top of the container body 100 is grasped with one hand, and the thumb of the same hand is pressed inward as shown by the arrow in Fig. 3(B), causing the thin-walled deforming portion 30 to deform into an arc shape. Focusing on the upper half 30a of this thin-walled deformed portion 30, it has an undercut shape that is concave as it moves downward from the tip 23 of the top plate 22, and outside the imaginary line I shown in Figure 3(B), it has a tsuba-like shape (a shape suitable for finger hooking work). In this specification, the term "undercut shape" refers to a shape that is immediately below an outward protrusion and recesses inward as it moves away from the protrusion. In other words, the undercut shape is a shape that gradually warps outward (toward the radial outside of the cylindrical wall) from the bottom to the top. In this embodiment, the upper half 30a of the thin-walled deformation portion 30 is adjacent to the tip 23 of the top plate 22, and therefore, in combination with the tip 23, it exhibits sufficient strength to hook a finger and pull up. The shape of the portion extending from the upper half 30a of the thin-walled deformed portion 30 in the inwardly bent state to the tip 23 of the top plate 22 resembles the flange of a container of the prior art. The shape of this portion is suitable as a flange substitute portion. Therefore, in this embodiment, an aspect of the invention is proposed in which the upper half portion 30a of the thin-walled deformed portion 30 and the tip portion 23 of the top plate 22 form a flange substitute portion. However, in the present invention, it is not an essential requirement that the thin-walled deformed portion 30 be adjacent to the top plate 22. Even if there is a gap between the top plate 22 and the thin-walled deformed portion 30, it can function as a flange substitute portion as long as it is deformed into a concave shape for finger placement by external pressure and has enough shape retention (strength) to maintain that shape.

[0027] In the above configuration, in the state shown in FIG. 1, no protrusions such as flanges are visible on the exterior of the cap, so a neat and beautiful appearance can be provided. Furthermore, as will be described later, unless the user intentionally presses the thin-walled deformed portion, it will not become concave for a finger hook, so there is almost no risk of the lid opening due to contact with other stored items when the lid is stored in a bag or the like. When opening the lid, for example, the container body 100 is held in one hand, and the thin-walled deformation portion 30 is pressed with the thumb of that hand as shown in FIG. 3(B). As a result, the upper half 30a of the thin-walled deformation portion 30 is deformed inwardly below the tip 23 of the top plate 22 in an undercut shape, and together with the tip 23, it takes on a shape like a flange. By pulling up the upper half 30a and tip 23 of the thin-walled deformation portion 30 with the fingers as a substitute for a flange, the top cover 20 rotates around the hinge 18 and is opened. When the pouring operation is completed, the top lid 20 is turned in the closing direction, and the top lid 20 closes against the cap body 2, returning to its original state.

[0028] According to the above-described configuration and function, a thin-walled deformed portion 30 is formed in the cylindrical peripheral wall 26 of the top lid by hollowing out the inside thereof, and this thin-walled deformed portion 30 is positioned adjacent to the top plate 22. When the thin-walled deformed portion 30 is pressed in, it deforms into a concave shape for a finger hook when viewed from the side, so that it can be used to open the lid in place of the flange portion. In particular, when the upper half 30a of the thin-walled deforming portion 30 is deformed into an undercut shape by a pushing operation, it is suitable as a flange substitute portion. The thin-walled deformation portion 30 extends to the lower edge L of the cylindrical peripheral wall 26, and the lower end portion 34 of the thin-walled deformation portion 30 can be displaced inward as the upper half portion 30a is pushed in, thereby increasing the degree of freedom of deformation of the thin-walled deformation portion 30 and ensuring its function as a flange substitute portion. An outward step 9 is formed on the upper surface of the top plate 4 of the cap body 2, positioned inside the thin-walled deformed portion 30 to restrict inward deformation of the thin-walled deformed portion 30. This reduces the risk of damage to the thin-walled deformed portion 30 due to the user pushing the thin-walled deformed portion 30 too hard or another object colliding with the thin-walled deformed portion 30. The portion of the top plate 4 close to the front half wall portion 26b is recessed, and a gap V is formed above this recessed portion 8 for pushing in the thin-walled deformed portion 30, so the operation of pushing in the thin-walled deformed portion 30 can be carried out without any problems. [Explanation of symbols]

[0029] 2...Cap body 3...Mounting tube 4...Top plate 6...Inner peripheral portion 7...Outer peripheral portion 8...depressed portion 8a...upper edge portion 8b...lower edge portion 9...outward stepped portion 10... remaining top plate portion 11... pouring tube 12...spout 14...seal tube 16...periphery wall 18...hinge 20... Upper cover 22... Top plate 23... Tip 24... Stopper tube 25... Stopper portion 26... Cylinder peripheral wall 26a...Base half wall part 26b...Top half wall part 28...Step part 30...Thin-walled deformed portion 30a...Upper half portion 32...Upper end portion 34...Lower end portion 36...Side edge (border line) 38...Circumferential step 100...container body 102...mouth and neck portion a...Circular arc b...Line segment e1...Base end e2...Tip end I...Imaginary line L...Lower edge n1...Female thread n2...Male thread R...Reinforcement wall part S... flange substitute V... gap X... cylinder diameter direction Y... side

Claims

1. a cap body (2) that is attached to the neck portion (102) of the container body (100) and has a spout (12); A top cover (20) connected to the cap body (2) via a hinge (18) A hinge cap comprising: The upper cover (20) has a cylindrical peripheral wall (26) hanging down from the peripheral edge of the top plate (22), The hinge (18) is disposed on the base end (e1) side of the upper cover (20) in one cylindrical diameter direction (X), Furthermore, a thin-walled deformed portion (30) is formed on the cylindrical peripheral wall (26) at a position on the front end (e2) side in the cylindrical diameter direction (X) by removing material from the inner side of the cylindrical peripheral wall (26), This thin-walled deformation portion (30) is formed thinner than the remaining portion of the cylindrical peripheral wall (26), with a pair of side ends (36) of the thin-walled deformation portion (30) as the boundary, and is characterized in that it deforms into a concave shape for hanging fingers when pressed from the outside.

2. The thin-walled deformation portion (30) is disposed adjacent to the top plate (22), 2. The hinge cap according to claim 1, wherein, when the thin-walled deformed portion (30) is pressed in, the upper half (30a) of the thin-walled deformed portion (30) is deformed into an undercut shape that is recessed inward as it moves away from the top plate (22), as viewed from the side (Y) perpendicular to the cylindrical diameter direction (X).

3. 3. A hinge cap as described in claim 1 or claim 2, characterized in that the thin-walled deformation portion (30) extends to the lower edge (L) of the cylindrical peripheral wall (26), and the lower end portion (34) of the thin-walled deformation portion (30) can be displaced inward as the thin-walled deformation portion (30) is pushed in.

4. The cap body (2) comprises an attachment tube (3) for attachment to the outer surface of the mouth / neck portion (102) of the container body (100); The mounting tube (3) has a top plate (4) connected thereto, 4. The hinge cap according to claim 3, characterized in that an outward step portion (9) is formed on the upper surface of the top plate (4) and is positioned inside the thin-walled deformation portion (30) to restrict inward deformation of the thin-walled deformation portion (30).

5. The cylindrical peripheral wall (26) has a tip half wall portion (26b) farther from the hinge (18) extending downward longer than a base half wall portion (26a) close to the hinge (18), 5. The hinge cap according to claim 4, wherein a portion of the top plate (4) adjacent to the front half wall portion (26b) is recessed, and a gap (V) is formed above this recessed portion (8) for pushing in the thin-walled deformation portion (30).

6. 2. A hinge cap as described in claim 1, characterized in that the outer peripheral surface of the cap body (2) is flush with the outer surface of the portion of the cylindrical peripheral wall (26) where the thin-walled deformation portion (30) is formed, when viewed from above, or is configured to protrude radially outward from the outer surface of that portion.

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