Skull reshape correction helmet and method for manufacturing a skull reshape correction helmet

Abstract

To provide a skull shape correction helmet which is light-weight and has inconspicuous vent holes, and a method of producing the skull shape correction helmet.SOLUTION: A skull shape correction helmet 1 to be used to cover a head for correcting skull deformation comprises: a shell 11 provided with a plurality of first vent holes 17; and a cushion 19 disposed on the inner side of the shell 11 to be in contact with the head. The vent holes 17 each comprises: a first opening 22 positioned at the outer surface of the shell 11; an enlarged diameter part 23 having an equivalent circle diameter larger than that of the first opening part 22; and an inner face part 24 combining the first opening part 22 and the enlarged diameter part 23.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cranial shape correction helmet worn on the head to correct cranial deformation and a method for manufacturing the cranial shape correction helmet.

Background Art

[0002] In infants and young children, cranial deformations that require treatment, such as plagiocephaly, brachycephaly, and dolichocephaly, may occur. Plagiocephaly is a deformed shape in which the skull is not symmetric left and right but is tilted to one side. Brachycephaly is a deformed shape in which the anteroposterior dimension of the skull is significantly short. Dolichocephaly is a deformed shape in which the anteroposterior dimension of the skull is significantly long. As an appliance for treating such cranial deformations, a cranial shape correction helmet that promotes deformation so that the shape of the skull is corrected as the skull grows by covering the head is disclosed in Patent Document 1 below.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the cranial shape correction helmet is a helmet that an infant always wears, weight reduction is required.

[0005] On the other hand, since the cranial shape correction helmet is a helmet that an infant always wears, the infant's head may get stuffy. For this reason, ventilation through holes are provided in the shell so that the moisture on the head evaporates to the outside from the cranial shape correction helmet.

[0006] Furthermore, since this helmet is worn constantly by infants and toddlers, it requires a design that infants and toddlers will want to wear, as well as an aesthetically pleasing appearance. For this reason, the ventilation holes need to be as inconspicuous as possible. In other words, considering the design and aesthetics, it was difficult to reduce weight by incorporating large-diameter ventilation holes.

[0007] The present invention aims to provide a lightweight skull-shaping helmet with inconspicuous ventilation holes and a method for manufacturing a skull-shaping helmet. [Means for solving the problem]

[0008] (1) A cranial reshaping helmet is a cranial reshaping helmet that is placed on the head to correct a deformation of the skull, comprising a shell provided with a plurality of first ventilation holes, and a cushion disposed on the inner surface of the shell and in contact with the head, wherein the plurality of first ventilation holes have a first opening located on the outer surface of the shell, an enlarged portion having a circular equivalent diameter larger than the circular equivalent diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion.

[0009] (2) The enlarged portion of the skull-shape correcting helmet described in (1) is provided on the inner surface of the shell.

[0010] (3) The plurality of first ventilation holes of the cranial shape correction helmet according to (1) or (2) each have a first opening located on the outer surface of the shell, a second opening located on the inner surface of the shell, and an enlarged portion located between the first and second openings, wherein the equivalent circular diameter of the enlarged portion is greater than the equivalent circular diameter of the first opening and the equivalent circular diameter of the second opening.

[0011] (4) The equivalent circular diameter of the first opening of the cranial shape correction helmets described in (1) to (3) is between 0.5 mm and 5 mm.

[0012] (5) The circular equivalent diameter of the enlarged portion of the cranial shape correction helmets described in (1) to (4) is 1.2 times or more the circular equivalent diameter of the first opening.

[0013] (6) The cranial reshaping helmets of (1) to (5) are cranial reshaping helmets that are placed on the head to correct cranial deformation, and each comprises a shell provided with a plurality of first ventilation holes, a cushion placed on the inner surface of the shell and in contact with the head, and a water pressure transfer membrane provided on the outer surface of the shell, wherein the plurality of first ventilation holes have a first opening located on the outer surface of the shell, an enlarged portion having a circular equivalent diameter larger than the circular equivalent diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion.

[0014] (7) A method for manufacturing a cranial shape correction helmet is a method for manufacturing a cranial shape correction helmet that is placed on the head to correct a deformation of the skull, comprising the steps of: preparing a shell provided with a plurality of first ventilation holes having a first opening located on the outer surface, an enlarged portion having a circular equivalent diameter larger than the circular equivalent diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion; unfolding a water pressure transfer film on the water surface; and pressing the shell against the water surface with the outer surface of the shell facing the water surface, thereby bringing the water pressure transfer film into contact with the first opening having a circular equivalent diameter smaller than the circular equivalent diameter of the enlarged portion. [Effects of the Invention]

[0015] A lightweight skull-shaping helmet with inconspicuous ventilation holes and a method for manufacturing a skull-shaping helmet are provided. [Brief explanation of the drawing]

[0016] [Figure 1] This is a perspective view of a skull-shaping helmet according to one embodiment of the present invention, viewed from a diagonal front angle. [Figure 2] This is a perspective view of the shell of a skull-shape correction helmet according to one embodiment of the present invention. [Figure 3] This is a cross-sectional view of the shell of a skull-shape correcting helmet according to one embodiment of the present invention, and in particular, a cross-sectional view taken across a ventilation hole provided in the shell. [Figure 4] This is a perspective view of the shell of a skull-shape correcting helmet according to one embodiment of the present invention, observed from the lower opening side. [Figure 5] The perspective view observed from the inner surface side of the shell of the skull shape correction helmet according to an embodiment of the present invention. [Figure 6] The perspective view of the shell of the skull shape correction helmet according to the comparative example. [Figure 7] The perspective view of the shell of the skull shape correction helmet according to the comparative example observed from the lower opening side. [Figure 8] The perspective view observed from the inner surface side of the shell of the skull shape correction helmet according to the comparative example. [Figure 9] The cross-sectional view of the shell of the skull shape correction helmet according to a modified example of the present invention, particularly, the cross-sectional view by the cross-section cutting through the ventilation holes provided in the shell. [Figure 10] The cross-sectional view of the skull shape correction helmet according to a modified example of the present invention, particularly, the cross-sectional view by the cross-section cutting through the ventilation holes provided in the shell. [Figure 11] The cross-sectional view of the shell according to a modified example of the present invention, particularly, the cross-sectional view of the shell provided with the hydrostatic transfer film by the cross-section cutting through the first ventilation holes.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the skull shape correction helmet 1 according to Embodiment 1 of the present invention will be described with reference to the drawings. In each figure, the same reference numerals are assigned to the same components.

[0018] (Embodiment 1) FIG. 1 is a perspective view when the skull shape correction helmet 1 according to Embodiment 1 is viewed obliquely from the front. The skull shape correction helmet 1 is put on the head to correct the deformation of the skull of the treatment target person. The skull shape correction helmet 1 includes a shell 11, a cushion 19, and a hydrostatic transfer film 21.

[0019] As shown in Figure 1, the shell 11 has an upper opening 12 and a lower opening 13. Although the figure of the person receiving treatment wearing the cranial reshaping helmet 1 is omitted, the top of the person's head is exposed above the upper opening 12, and the person's face, ears, neck, etc. are exposed below the lower opening 13. The shell 11 has an annular main part 14 that surrounds the skull in the circumferential direction, a dorsal extension 15 that extends downward from the rear of the main part 14, and a pair of left and right lateral protrusions 16 that project downward from the left and right sides of the main part 14, respectively. The dorsal extension 15 faces the back of the person's neck, and each lateral protrusion 16 is located in front of the person's ears. The person's ears are located between the dorsal extension 15 and each lateral protrusion 16.

[0020] The shell 11 constitutes the outer shape of the skull-shape correcting helmet 1. The shell 11 has a C-shape. The opening of the C-shape has one end piece 28 of the shell 11 and the other end piece which is on the back and not shown in Figure 1. The one end piece 28 and the other end piece are connected to each other via a connecting member 29. The connecting member 29 has a first fixing pin 29A fixed to a pin hole (not shown) made in the shell 11, a first strip-shaped body 29B which is bent into a ring shape and fixed to the first fixing pin 29A, a second fixing pin (not shown), a second strip-shaped body 29C which is bent into a ring shape and fixed to the second fixing pin, and an annular fitting 29D through which the respective ring-shaped portions of the first strip-shaped body 29B and the second strip-shaped body 29C pass. The second strip-shaped body 29C is bent and placed over the second strip-shaped body 29C (itself) after passing through the annular fitting 29D and is fixed with a commonly known hook-and-loop fastener. The second strip-shaped body 29C is joined with appropriate tension applied, fixing the distance between the first fixing pin 29A and the second fixing pin, and fixing the space between one end piece 28 and the other end piece. As a result, the space between one end piece 28 and the main part 14 is fixed, and the overall shape of the shell 11 is fixed.

[0021] The shell 11 is provided with a plurality of first ventilation holes 17. The first ventilation holes 17 allow sweat to evaporate from the head when an infant or young child, as the treatment subject, is constantly wearing the cranial reshaping helmet 1. As shown in Figure 1, it is preferable to have a large number of first ventilation holes 17. The outer surface 11A of the shell 11 has a pattern 18, which will be described later. Since it is something that infants and young children wear constantly, there is a high need for an attractive pattern 18.

[0022] The cushion 19 is positioned on the inner surface of the shell 11 and comes into contact with the head. The cushion 19 serves to mitigate damage to the scalp that occurs when the skull to be corrected is pressed directly against the hard shell 11. The cushion 19 has a plurality of second ventilation holes 20. The plurality of second ventilation holes 20 may be provided at equal intervals in the vertical and horizontal directions. The second ventilation holes 20 have an opening diameter of, for example, about 2 mm in diameter. The second ventilation holes 20 may have an opening diameter of, for example, 1 mm to 4 mm, and may have an opening diameter smaller than the opening diameter of the first ventilation holes 17. The cushion 19 includes a molded body of a resilient foamed synthetic resin. The cushion 19 may have a layered structure of, for example, urethane foam and fabric. The cushion 19 is detachably attached to the inner surface of the shell 11, for example via hook and loop fasteners.

[0023] The water transfer film 21 is provided on the outer surface 11A of the shell 11. The water transfer film 21 is provided on the outer surface 11A of the shell 11 and constitutes the pattern 18. The presence or absence of the water transfer film 21 is optional, and its description is omitted in this embodiment. The case in which the water transfer film 21 is provided will be described in Modification 2.

[0024] Figure 2 is a perspective view of the shell 11 of the cranial shape correction helmet 1. In Figure 2, an example is shown in which the connecting member 29 in Figure 1 is provided on the opposite side from Figure 1 in order to make the first ventilation holes 17 easier to see. The first ventilation holes 17 are formed over almost the entire surface of the shell 11. Near the upper opening 12 and lower opening 13 of the shell 11, the shell 11 may be made thicker for reinforcement. In this case, as shown in Figure 2, the density of the first ventilation holes 17 may be lower in the part of the shell 11 that is close to the edge.

[0025] Figure 3 is a cross-sectional view of the shell 11 of the cranial reshaping helmet 1, and in particular, a cross-sectional view taken across the first ventilation holes 17 provided in the shell 11. The cranial reshaping helmet 1 according to this embodiment 1 is a cranial reshaping helmet 1 that is placed on the head to correct cranial deformation, and comprises a shell 11 provided with a plurality of first ventilation holes 17, and a cushion 19 (not shown in Figure 3) arranged on the inner surface of the shell 11 and in contact with the head. The plurality of first ventilation holes 17 have a first opening 22 located on the outer surface 11A of the shell 11, an enlarged diameter portion 23 with an equivalent diameter larger than the equivalent diameter of the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23. In the example shown in Figure 3, the enlarged diameter portion 23 is provided on the inner surface 11B of the shell 11. The inner surface portion 24 is composed of a tapered surface. Figure 4 is a perspective view of the shell 11 of the cranial shape correction helmet 1, observed obliquely from the lower opening 13 side. The shell 11 has a first opening 22 visible on the surface of the first ventilation hole 17, and a second opening 25 as an enlarged diameter portion 23 located inside the shell 11 and difficult to see from the outside. As shown in Figure 4, the second opening 25 is large but difficult to see from the outside, and the first opening 22 is inconspicuous. Figure 5 is a partial perspective view of the first ventilation hole 17 provided in the shell 11 of the cranial shape correction helmet 1, observed from the inner surface 11B side of the shell 11. The first ventilation hole 17 has a small diameter first opening 22, a large diameter second opening 25 (enlarged diameter portion 23), and an inner surface portion 24.

[0026] Returning to Figure 3, the first opening 22 of the cranial shape correction helmet 1 has, for example, an opening diameter d1 of 0.5 mm to 5 mm. At this time, the cranial shape correction helmet 1 has a first ventilation hole 17 that is not very noticeable. The cranial shape correction helmet 1 maintains an aesthetic appearance. Furthermore, a cranial shape correction helmet 1 that is superior in terms of strength, weight, and aesthetics is realized.

[0027] The second opening 25 (enlarged diameter portion 23) of the cranial shape correction helmet 1 has a circular equivalent diameter d2 of 3 mm or more. The shell 11 has a first ventilation hole 17 that is large in size to the second opening 25, while keeping the first opening 22 small, and is not conspicuous on the inner surface of the shell 11. The shell 11 can have a first ventilation hole 17 in which the volume of the space occupies a large proportion of the shell 11. The cranial shape correction helmet 1 has a lightweight shell 11 in which the volume of the space of the first ventilation hole 17 occupies a large proportion of the shell 11.

[0028] Figures 6 to 8 show a comparative example of a cranial shape correction helmet 1. Figure 6 is a perspective view of the shell 11 of the comparative example of the cranial shape correction helmet 1. Figure 7 is a perspective view of the shell 11 of the cranial shape correction helmet 1 of the comparative example, viewed obliquely from the lower opening 13 side. Figure 8 is a perspective view of the first ventilation hole 17 provided in the shell 11 of the cranial shape correction helmet 1 of the comparative example, viewed from the inner surface 11B side of the shell 11. Figure 6 corresponds to Figure 2, Figure 7 to Figure 4, and Figure 8 to Figure 5.

[0029] Let's compare Figure 6 with Figure 2. The first opening 22 of the first ventilation hole 17 in the embodiment of Figure 2 has a smaller diameter and is less noticeable than the first opening 22 of the first ventilation hole 17 in the comparative example of Figure 6. On the other hand, the embodiment of Figure 4 has a larger second opening 25 of the first ventilation hole 17 compared to the second opening 25 of the first ventilation hole 17 in the comparative example of Figure 7. Let's compare the enlarged view of the first ventilation hole 17 in the embodiment of Figure 5 with the enlarged view of the first ventilation hole 17 in the comparative example of Figure 8. The first ventilation hole 17 in the embodiment has a larger spatial volume compared to the comparative example. The shell 11 in the embodiment has a first ventilation hole 17 that is less noticeable externally and contributes to weight reduction.

[0030] Returning to Figure 3, let's explain in more detail. The enlarged diameter portion 23 of the cranial shape correction helmet 1 has, for example, a circular equivalent diameter d2 of 3 mm or more. The enlarged diameter portion 23 of the cranial shape correction helmet 1 has, for example, a diameter of 1.2 times or more the opening diameter d1 of the first opening 22. These features contribute to further weight reduction of the shell 11.

[0031] Preferably, the cross-section of the first ventilation hole 17 is circular. However, the cross-section of the first ventilation hole 17 is not limited to a circle, and may be a polygon such as a triangle or square, or a closed curve including an ellipse. In the above, the opening diameter and diameter of the first ventilation hole 17 can be considered as the diameter equivalent to a circle.

[0032] Multiple first ventilation holes 17 are provided in the shell 11 to allow sweat to evaporate from the head. There may be multiple first ventilation holes 17, for example, 20 or more. Preferably, 100 or more, or 200 or more, of the first ventilation holes 17 are provided. This can promote the evaporation of sweat from the skull-shaping helmet 1. In the embodiment shown in Figure 1, approximately 300 first ventilation holes 17 are provided. The opening diameters of the multiple first ventilation holes 17 may or may not be uniform.

[0033] The shell 11 may also have holes other than the first ventilation hole 17 described above, which serve as ventilation holes. For example, it may have a palpation hole (not shown) into which a finger can be inserted. The palpation hole is a hole that allows a physician or other medical professional performing treatment to insert a finger from the outside of the shell 11 and measure the distance between the inner surface of the shell 11 and the treatment area on the head of the person being treated by palpation. There may be multiple palpation holes. Furthermore, the palpation hole is not limited to being circular in shape, but its size is preferably such that the equivalent diameter of the circle is 10 mm or more and 25 mm or less.

[0034] (Variation 1) In the above embodiment, the enlarged diameter portion 23 is formed on the inner surface 11B of the shell 11. In modified example 1, the plurality of first ventilation holes 17 of the skull-shaping helmet 1 include a first opening 22 located on the outer surface 11A of the shell 11, a second opening 25 located on the inner surface 11B of the shell 11, and an enlarged diameter portion 23 provided between the first opening 22 and the second opening 25. The first ventilation hole 17 includes an inner surface portion 24A connecting the first opening 22 and the enlarged diameter portion 23, and an inner surface portion 24B connecting the enlarged diameter portion 23 and the second opening 25. The equivalent circular diameter of the enlarged diameter portion 23 is larger than the equivalent circular diameter of the first opening 22 and the equivalent circular diameter of the second opening 25.

[0035] Figure 9 is a cross-sectional view of the shell 11 of the cranial shape correction helmet 1 according to Modification 1, and in particular, a cross-sectional view taken across the first ventilation hole 17 provided in the shell 11. The first ventilation hole 17 has a first opening 22, an enlarged diameter portion 23, and a second opening 25. The equivalent circular diameter d2 of the enlarged diameter portion 23 is larger than the equivalent circular diameter d1 representing the opening diameter d1 of the first opening 22 and the equivalent circular diameter d3 of the second opening 25. Comparing the cross-section shown in Figure 9 with the cross-section shown in Figure 3, the cross-section shown in Figure 9 is close to a closed curve and is less susceptible to deformation from surrounding stress or external forces. That is, the cranial shape correction helmet 1 having the first ventilation hole 17 according to Modification 1 has higher strength. The cranial shape correction helmet 1 having the first ventilation hole 17 according to Modification 1 has a lightweight shell 11 while maintaining high strength.

[0036] Figure 10 is a cross-sectional view of a cranial shape correction helmet 1 according to Modification 1, and in particular, a cross-sectional view taken across a first ventilation hole 17 provided in the shell 11 and a second ventilation hole 20 provided in the cushion 19. The cranial shape correction helmet 1 includes a cushion 19 positioned on the inner surface of the shell 11 and in contact with the head, and the cushion 19 is provided with a plurality of second ventilation holes 20 corresponding to the positions of a plurality of first ventilation holes 17 in the shell 11, and the opening diameter d4 of the second ventilation holes 20 may be greater than or equal to the opening diameter d1 of the first opening 22 of the corresponding first ventilation hole 17.

[0037] (Modification 2) In the above, the pattern 18 shown in Figure 1 is not mentioned. As a second modification, an example in which the pattern 18 is formed by a water transfer film 21 will be described with reference to Figure 11. Figure 11 is a cross-sectional view of the shell 11, and in particular a cross-sectional view of the shell 11 equipped with a water transfer film 21, with a cross-section that crosses the first ventilation holes 17. The cranial shape correction helmet 1 is a cranial shape correction helmet 1 that is worn on the head to correct cranial deformation, and comprises a shell 11 provided with a plurality of first ventilation holes 17, and a water transfer film 21 provided on the outer surface 11A of the shell 11, wherein the plurality of first ventilation holes 17 have a first opening 22 on the outer surface side of the shell 11, an enlarged diameter portion 23 with a cross-sectional area larger than the opening area of ​​the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23. The water transfer film 21 constitutes the pattern 18 shown in Figure 1.

[0038] The skull shape correction helmet 1 according to the modified example 2 is manufactured as follows. The method for manufacturing the skull shape correction helmet 1 is a method for manufacturing a skull shape correction helmet 1 that is placed on the head to correct skull deformation, and comprises the steps of: preparing a shell 11 provided with a plurality of first ventilation holes 17 having a first opening 22 on the outer surface side, an enlarged diameter portion 23 having a cross-sectional area larger than the opening area of ​​the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23; unfolding a water pressure transfer film 21 on the water surface; and pressing the shell 11 against the water surface with the outer surface 11A of the shell 11 facing the water surface, and bringing the water pressure transfer film 21 into contact with the first opening 22 having a circular equivalent diameter smaller than the circular equivalent diameter of the enlarged diameter portion 23.

[0039] The outer surface 11A of the shell 11 is transferred to the water pressure transfer film 21 by the uniformly applied water pressure. For this reason, the water pressure transfer film 21 is formed uniformly around the first ventilation hole 17, as shown in Figure 11.

[0040] The above description concerns an example in which the pattern 18 has a water transfer film 21. However, the ink layer constituting the pattern 18 is not limited to a water transfer film 21. The ink may be applied by painting with lacquer spray or the like, or by applying it with a brush.

[0041] This disclosure allows for various embodiments and modifications without departing from the broad spirit and scope of the present invention. Furthermore, the embodiments described above are for illustrative purposes only and do not limit the scope of the present invention. That is, the scope of the present invention is indicated by the claims, not by the embodiments. Various modifications made within the scope of the claims and the equivalent significance of the disclosure are considered to be within the scope of the present invention.

[0042] The following effects can be achieved according to the skull shape correction helmet 1 and the method for manufacturing the skull shape correction helmet 1 as described above.

[0043] (1) The cranial shape correction helmet 1 is a cranial shape correction helmet 1 that is placed on the head to correct the deformation of the skull, and comprises a shell 11 provided with a plurality of first ventilation holes 17, and a cushion 19 disposed on the inner surface of the shell 11 and in contact with the head, wherein the plurality of first ventilation holes 17 have a first opening 22 located on the outer surface 11A of the shell 11, an enlarged diameter portion 23 having a circular equivalent diameter larger than the circular equivalent diameter of the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23.

[0044] This provides a lightweight skull-shaping helmet 1 with inconspicuous first ventilation holes 17.

[0045] (2) The enlarged diameter portion 23 of the skull shape correction helmet 1 of (1) is provided on the inner surface 11B of the shell 11.

[0046] As a result, the enlarged diameter section 23 is not visible externally, and the weight of the shell 11 is reduced.

[0047] (3) The plurality of first ventilation holes 17 of the skull shape correction helmet 1 of (1) or (2) have a first opening 22 located on the outer surface 11A of the shell 11, a second opening 25 located on the inner surface 11B of the shell 11, and an enlarged diameter portion 23 located between the first opening 22 and the second opening 25, wherein the equivalent circular diameter of the enlarged diameter portion 23 is larger than the equivalent circular diameter of the first opening 22 and the equivalent circular diameter of the second opening 25.

[0048] This results in a shell 11 with smaller openings on its surface and superior strength. The first ventilation hole 17, with its shape described above, compresses the sphere even under external force, making it less prone to distortion. As a result, a shell 11 with superior strength is achieved.

[0049] (4) The equivalent circular diameter of the first opening 22 of the cranial shape correction helmet 1 described in (1) to (3) is 0.5 mm or more and 5 mm or less.

[0050] This results in a skull-shape correction helmet 1 that is superior in terms of strength, weight, and aesthetics.

[0051] (5) The circular equivalent diameter of the enlarged portion 23 of the skull shape correction helmet 1 described in (1) to (4) is 1.2 times or more the circular equivalent diameter of the first opening 22.

[0052] This will further reduce the weight of the shell 11.

[0053] (6) The cranial shape correction helmet 1 of (1) to (5) is a cranial shape correction helmet 1 that is placed on the head to correct the deformation of the skull, and comprises a shell 11 provided with a plurality of first ventilation holes 17, a cushion 19 placed on the inner surface 11B of the shell 11 and in contact with the head, and a water pressure transfer film 21 provided on the outer surface 11A of the shell 11, wherein the plurality of first ventilation holes 17 have a first opening 22 located on the outer surface 11A of the shell 11, an enlarged diameter portion 23 having a circular equivalent diameter larger than the circular equivalent diameter of the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23.

[0054] As a result, sweat from the head can easily evaporate through the second ventilation hole 20 and the first ventilation hole 17.

[0055] (7) A method for manufacturing a skull shape correction helmet 1 is a method for manufacturing a skull shape correction helmet 1 that is placed on the head to correct skull deformation, and comprises the steps of: preparing a shell 11 provided with a plurality of first ventilation holes 17 having a first opening 22 located on the outer surface 11A, an enlarged diameter portion 23 having a circular equivalent diameter larger than the circular equivalent diameter of the first opening 22, and an inner surface portion 24 connecting the first opening 22 and the enlarged diameter portion 23; unfolding a water pressure transfer film 21 on the water surface; and pressing the shell 11 against the water surface with the outer surface 11A of the shell 11 facing the water surface, and bringing the water pressure transfer film 21 into contact with the first opening 22 having a circular equivalent diameter smaller than the circular equivalent diameter of the enlarged diameter portion 23.

[0056] This provides a lightweight, aesthetically pleasing skull-shape correcting helmet 1 in which the first ventilation holes 17 are inconspicuous. [Explanation of Symbols]

[0057] 1. Skull reshaping helmet 11 Shells 12 Upper opening 13 Lower opening 14 First end piece 15 Second end piece 16 bands 17. First ventilation opening 18 patterns 19 Cushions 20 Second vent 21. Hydraulic transfer film 22 First opening 23 Expanded diameter part 24 Inner surface 25 Second opening d1 Diameter of the first opening d2 Diameter of the enlarged section d3 Diameter of the second opening d4 Diameter of the opening of the second vent

Claims

1. A skull-shaping helmet that is worn on the head to correct skull deformities, A shell provided with multiple first ventilation holes, The shell comprises a cushion placed on the inner surface of the shell and in contact with the head, Each of the plurality of first ventilation holes has a first opening located on the outer surface of the shell, an enlarged portion having a diameter larger than the diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion. The enlarged diameter portion is a skull-shape correcting helmet provided on the inner surface of the shell.

2. The plurality of first ventilation holes each have a first opening located on the outer surface of the shell, a second opening located on the inner surface of the shell, and an enlarged diameter portion located between the first opening and the second opening. The equivalent circular diameter of the enlarged portion is larger than the equivalent circular diameter of the first opening and the equivalent circular diameter of the second opening. The skull shape correcting helmet according to claim 1.

3. The equivalent circular diameter of the first opening is 0.5 mm or more and 5 mm or less. A skull shape correcting helmet according to claim 1 or 2.

4. The skull shape correcting helmet according to claim 1 or 2, wherein the equivalent circular diameter of the enlarged portion is 1.2 times or more the equivalent circular diameter of the first opening.

5. A skull-shaping helmet that is worn on the head to correct skull deformities, A shell provided with multiple first ventilation holes, A cushion is placed on the inner surface of the shell and comes into contact with the head, The shell comprises a water pressure transfer film provided on the outer surface of the shell, Each of the plurality of first ventilation holes has a first opening located on the outer surface of the shell, an enlarged portion having a diameter larger than the diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion. The enlarged diameter portion is a skull-shape correcting helmet provided on the inner surface of the shell.

6. A method for manufacturing a skull-shape correcting helmet that is placed on the head to correct skull deformation, The steps include: preparing a shell having a plurality of first ventilation holes, each having a first opening located on the outer surface, an enlarged portion having a diameter larger than the diameter of the first opening, and an inner surface portion connecting the first opening and the enlarged portion; The steps include deploying a water pressure transfer film on the water surface, The steps include: pressing the outer surface of the shell against the water surface and bringing the shell into contact with the water surface, and bringing the water pressure transfer film into contact with the first opening having a circular equivalent diameter smaller than the circular equivalent diameter of the enlarged portion; Equipped with, The enlarged diameter portion is provided on the inner surface of the shell. A method for manufacturing a skull shape correcting helmet.

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