helmet

Abstract

To provide a helmet which protects the head from impact, is provided with an air blowing fan as a measure against heat, eliminates the risk of a wearer's hair being caught in the air blowing fan, and efficiently ventilates the inside of the helmet by discharging air from the inside of the helmet. [Solution] The helmet comprises at least an impact absorbing molded material 2 constituting an interior body disposed inside the helmet body that protects the head from impacts, and an air blowing means 3 attached to the impact absorbing molded material. The impact absorbing molded material has an air passage 22 on one surface facing the helmet body. The air blowing means comprises an axial fan 31 that draws air from the wearer's head side and expels the air to the outside of the helmet body through the air passage, and a circular net-shaped cover member 32 whose opening area is wider than the non-opening area. The air blowing means has a hair entrapment prevention structure that prevents the wearer's hair from being entrapped in the axial fan as air is drawn in.

Description

[Technical field]

[0001] The present invention relates to a helmet, and more specifically, to a helmet worn to protect the head from impacts, etc., which is provided with a ventilation fan to combat the heat when wearing the helmet, and which has a ventilation function that exhausts air from inside the helmet to efficiently ventilate the inside of the helmet without risking the wearer's hair getting caught in the ventilation fan. [Background technology]

[0002] Traditionally, for safety reasons, workers at factories and construction sites have worn helmets to avoid various dangers such as falling or flying objects, or tripping. However, heat easily builds up inside the helmet, and various measures have been taken to protect against the heat, especially in the summer.

[0003] Conventionally, helmets designed to protect against the heat have been proposed that have, for example, an air intake port in the center of the top (top) of the helmet body or the interior body attached inside the helmet, and a blower fan is attached so that air is drawn in from the outside of the helmet and blown into the interior of the helmet (see, for example, Patent Documents 1 and 2).

[0004] However, while a means of blowing outside air into the helmet provides a pleasant cool sensation near the blower fan where the blown air hits, the force of the air weakens in areas away from the fan, making the sensation of coolness insufficient.

[0005] Therefore, rather than taking in outside air into the helmet, it is conceivable to change the direction of the blower fan to suck in the inside of the helmet and exhaust the humid, hot air, thereby eliminating the heat caused by humidity. With this type of ventilation means that exhausts air from inside the helmet, it is expected that a comfortable feeling of coolness can be obtained, regardless of the distance from the blower fan.

[0006] However, the space inside a helmet is very narrow, and simply installing a blower fan may cause the wearer's hair to get caught in the fan during suction inside the helmet. In addition, if the opening area on the suction side of the blower fan is reduced in order to prevent hair from getting caught in the fan, the loss of suction pressure will be large, reducing the amount of exhaust air, and it will not be possible to sufficiently eliminate stuffiness. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2008-101278 A [Patent Document 2] Special Publication No. 2014-523980 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention was developed in consideration of the above-mentioned conventional circumstances, and aims to provide a helmet that eliminates the risk of the wearer's hair getting caught in the ventilation fan and efficiently ventilates the inside of the helmet by expelling air from inside the helmet. [Means for solving the problem]

[0009] The helmet according to the present invention is provided with an air blowing function and is configured to include at least a helmet body that protects the head from impacts, an impact absorbing molded material that constitutes an interior body disposed inside the helmet body and is shaped so that it can be worn over the head of a wearer, and an air blowing means that is attached to an air suction port provided in the impact absorbing molded material, the impact absorbing molded material having an air passage on one side of the helmet body that connects the air suction port to which the air blowing means is attached and the outside of the helmet body, the air blowing means having an axial fan that draws in air from the wearer's head side and expels the air through the air passage to the outside of the helmet body, and a cover member that is interposed between the wearer's head and the axial fan and has a circular net-shaped opening area that is wider than a non-opening area to prevent the wearer's hair from coming into contact with the axial fan, and further having a hair entrapment prevention structure that prevents the wearer's hair from being entrapped in the axial fan as the air is sucked in.

[0010] In addition, in the helmet of the present invention, the hair entanglement prevention structure is formed by blades of the axial fan and vertical ribs on the cover member that extend radially from the center of the axial fan outward, and when the blades and the vertical ribs intersect in a planar direction, the edge of the blade at the front in the direction of rotation and the edge of the vertical rib located on the opposite side to the edge are formed at an angle that expands so as to gradually intersect from the center of the blade outward.

[0011] In this case, the hair entanglement prevention structure can be formed by the blade having an edge portion at the front in the rotational direction along a straight line inclined at a predetermined angle opposite to the rotational direction from a straight line extending radially from the center side of the axial fan outward, and the vertical rib arranged along a straight line extending radially from the center side of the axial fan outward.

[0012] In addition, the hair entanglement prevention structure may be formed by the blade having an edge portion at the front in the direction of rotation that is arranged along a straight line extending radially from the center of the axial fan outward, and the vertical rib that is arranged along a straight line inclined at a predetermined angle toward the direction of rotation from the straight line extending radially from the center of the axial fan outward.

[0013] In addition, the hair entanglement prevention structure may be formed so that it is inclined at a predetermined angle overall by the blades having edges at the front in the rotational direction that are arranged along a straight line inclined away from the rotational direction from a straight line extending radially from the center of the axial fan outward, and the vertical ribs arranged along a straight line inclined toward the rotational direction from a straight line extending radially from the center of the axial fan outward.

[0014] In other words, the hair entanglement prevention structure is preferably formed by tilting either or both of the front edge of the blade in the direction of rotation and the vertical rib of the cover member at a predetermined angle, so that the distance between the two is formed at an angle that gradually widens from the center of the blade outward.

[0015] In addition, in the helmet of the present invention, the hair entanglement prevention structure may include a protruding protrusion that protrudes from the cover member at a position covering the vicinity of the base end of the blades of the axial fan without coming into contact with the blades. In addition, in the helmet of the present invention, the hair entanglement prevention structure may include a hanging convex portion that protrudes from the base end of the blade of the axial fan without coming into contact with the cover member. In addition, in the helmet of the present invention, the hair entanglement prevention structure may include an upright protrusion that protrudes from the cover member at a position covering the vicinity of the base end of the blade of the axial fan without contacting the blade, and a hanging protrusion that protrudes from the base end of the blade of the axial fan, located inside the upright protrusion of the cover member without contacting the cover member.

[0016] In addition, in the helmet of the present invention, the air passages are preferably formed along the positions that correspond to the forehead, both left and right heads, and the back of the head when the wearer covers his or her head with the impact absorbing molding material. Furthermore, in the helmet according to the present invention, the shock absorbing molding may have a convex portion on the rear side of the head that protrudes toward the helmet body. Effect of the Invention

[0017] According to this invention, the air inside the helmet is forcibly exhausted by the axial fan, and the heat dissipation effect of ventilation (airflow) eliminates stuffiness on the head, providing a more refreshing and comfortable cool feeling. Moreover, the hair entrapment prevention structure allows the wearer's hair to escape (eliminate) without being entrapped in the axial fan. Furthermore, since the helmet is provided with a circular net-shaped cover member with an opening area wider than the non-opening area, there is little loss of suction pressure and stuffiness can be sufficiently eliminated. Therefore, it is possible to provide a helmet that eliminates the risk of the wearer's hair getting caught in the blower fan, and that efficiently ventilates the inside of the helmet by discharging air from inside the helmet. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view of a helmet with a blowing function according to an embodiment of the present invention; FIG. [Diagram 2] FIG. 2 is a plan view showing the functions of the impact absorbing molding material and the air blowing means that constitute the helmet shown in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line II in FIG. [Figure 4] 3 is a partially enlarged view illustrating a hair entanglement prevention structure of the air blowing means indicated by the symbol A surrounded by a dashed line circle in FIG. 2. [Diagram 5] 4 is a partially enlarged view illustrating a hair entanglement prevention structure of the air blowing means indicated by the symbol B surrounded by a dashed line circle in FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an example of an embodiment of a helmet equipped with a ventilation function according to the present invention will be described with reference to the drawings. In addition, the embodiments described below are preferred specific examples of the present invention, and therefore various technical limitations are imposed thereon. However, the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description.

[0020] As shown in FIG. 1, a helmet equipped with an air-blowing function in this embodiment (hereinafter simply referred to as "helmet") 10 is configured to include at least a helmet body 1, an impact-absorbing molding material 2, and air-blowing means 3.

[0021] The helmet main body 1 is formed in a substantially hemispherical shape using lightweight, high-strength reinforced plastic such as ABS resin, PC resin, or FRP resin to protect the head of the wearer (such as a worker) from impact, and is a part of the helmet 10 called the "shell." Hereinafter, the helmet main body 1 will be referred to as the shell. When the hat body 1 receives a strong impact, it disperses the impact and also deforms or cracks, thereby mitigating the impact on the wearer's head.

[0022] The impact-absorbing molded material 2 constitutes the inner body placed inside the hat body 1, and as an inner body, it ensures a certain distance between the hat body 1 and the wearer's head and is a member for absorbing impact. That is, the helmet 10 is composed of a hat body 1 and an inner body placed inside the hat body 1, and the impact absorbing molding material 2 is a part called the so-called "impact absorbing liner" of the helmet 10 that can be worn on the head of a wearer, for example, formed in a substantially hemispherical shape, like the hat body 1. Hereinafter, the impact absorbing molding material 2 will be referred to as the impact absorbing liner.

[0023] This interior body is composed of an impact absorbing liner 2 arranged between the hat body 1, as well as a hammock that improves the contact of the helmet 10 with the head and absorbs impact, a headband for adjusting the helmet 10 to the wearer's head circumference, and a chin strap for preventing the helmet 10 from falling off, all of which are not shown in the figure. The impact absorbing liner 2 can be made of, for example, polystyrene foam, and has a groove-like air passage 22 formed in a recess on one surface on the shell 1 side.

[0024] This air passage 22 is formed so as to communicate between an air suction port 21 provided in the impact absorbing liner 2 to which the blowing means 3 is attached and the outside of the cap body 1. Specifically, as shown in FIG. 2, for example, when a wearer covers his / her head with the impact absorbing liner 2, air passages 22 are formed at positions that correspond to the forehead, both left and right heads, and the back of the head, i.e., along the top surface, the front surface, the left and right sides, and the back surface.

[0025] In this way, by forming the air passages 22 along each desired position in the impact absorbing liner 2, it is possible to efficiently exhaust an optimal amount of air to the wearer's face, both ears, the back of the head, the neck, etc. Also, by adjusting the width of the air passages 22 provided at each position, it is possible to exhaust air even more efficiently.

[0026] As shown in FIG. 2, the impact absorbing liner 2 has a convex portion 23 that protrudes toward the hat body 1 at a position that corresponds to the back of the head when the wearer wears the hat. That is, the convex portion 23 provides a space between the cap body 1 and the back of the wearer's head. The convex portion 23 may be a projection of, for example, 3 mm. In this way, by providing the impact absorbing liner 2 with the convex portion 23 that creates a space (increases the distance) between the cap body 1 on the back side of the wearer's head, more air can be discharged more efficiently than through the air passage 22 formed on the back side of the head.

[0027] The blowing means 3 is attached to the air suction port 21 provided in the impact absorbing liner 2, and has an axial fan 31 and a cover member 32, as shown in Fig. 2 and Fig. 3, respectively. That is, the blowing means 3 is provided with the axial fan 3 attached so as to suck air from the wearer's head side at the air suction port 21 provided in the impact absorbing liner 2, as shown by the outline arrow in Fig. 3, and to discharge (blow) the air toward the hat body 1 side. The axial fan 3 shields the wearer's head side from the hat body 1 side. Further, the blowing means 3 has a cover member 32 attached to the air intake side so as to cover the axial flow fan 3 .

[0028] The air sucked in from the wearer's head side by the air blowing means 3 is discharged (blown) toward the outside of the hat body 1 through an air passage 22 formed on the hat body 1 side of the impact absorbing liner 2, as shown by the white arrow in Figure 2. Here, the wearer's head side refers to the side of the impact absorbing liner 2 that does not have the air passages 22, and the hat body 1 side refers to the side of the impact absorbing liner 2 that has the air passages 22. Also, the air suction port 21 to which the axial fan 3 is attached can be provided, for example, slightly behind the top surface of the impact absorbing liner 2 (toward the back of the wearer's head).

[0029] Therefore, the air sucked in by the axial fan 31 passes between the impact absorbing liner 2 and the shell 1 through a concave air passage 22 formed on one surface of the impact absorbing liner 2 facing the shell 1, as shown by the white arrow in Figure 2, and is discharged to the outside from the lower front, rear, and left and right sides of the helmet 10. When openings are provided on the top or side of the cap body 1, the sucked air is discharged from below and also discharged to the outside through these openings.

[0030] The cover member 32 is disposed between the wearer's head and the axial fan 31 to prevent the wearer's hair from coming into contact with the axial fan 31, and is, for example, in the shape of a circular net with an opening area wider than a non-opening area. Specifically, the cover member 32 is composed of vertical ribs 321 that spread out radially like a spider's web, and a plurality of circular horizontal ribs 322 that intersect with the vertical ribs 321 .

[0031] This cover member 32 is formed so that the opening area is wider than the non-opening area, so that loss of suction pressure by the axial fan 31 is small, preventing a decrease in air volume, improving ventilation performance, and adequately eliminating stuffiness inside the helmet.

[0032] The axial fan 31 and the cover member 32 are provided with a hair entanglement prevention structure that prevents the wearer's hair from being entangled in the axial fan 31 as air is sucked in. This hair entanglement prevention structure is formed by the blades 312 of the axial fan 31 and the vertical ribs 321 that spread out radially from the center of the axial fan 31 to the outside in the cover member 32. In detail, when the blades 312 and the vertical ribs 321 intersect (overlap) in a planar direction (when viewed from above), the edge 312f of the blade 312 at the front in the rotation direction and the edge 321s of the vertical rib 321 located on the side opposite to the edge 312f are formed at an expanding angle so as to gradually intersect from the center of the blade 312 to the outside.

[0033] Specifically, for example, as shown in Figure 4, the hair entanglement prevention structure is formed by blade 312 having edge 312f at the front in the rotation direction, which is arranged along straight line L2 shown by a dotted line in the figure, which is inclined at a predetermined angle in the opposite direction to the rotation direction shown by the solid arrow in the figure from straight line L1 shown by a dotted line in the figure, which extends radially from the center of axial fan 31 to the outside, and edge 321s of vertical rib 321 arranged along straight line L1 that extends radially from the center of axial fan 31 to the outside.

[0034] In FIG. 4, a front edge 312f of the blade 312 of the axial flow fan 31 in the direction of rotation is shown as being formed smaller and inclined by a predetermined angle θ than the opposing edge 321s of the vertical rib 321 of the cover member 32. That is, the front edge 312f of the blade 312 in the rotation direction is inclined toward the opposite side to the rotation direction of the axial fan 31 as it moves outward from the center of the axial fan 31. Therefore, the front edge 312f of the blade 312 in the rotation direction gradually intersects with the opposing edge 321s of the vertical rib 321 in a plan view from the center of the blade 312 toward the outside.

[0035] In this way, the blades 312 and the vertical ribs 321 are formed at an angle that expands so that they gradually intersect from the center of the blades 312 outward, so that even if the wearer's hair touches the axial fan 31, the hair will move toward the outer periphery along the edge 312f of the blade 312 at the front in the rotation direction as the axial fan 31 rotates, as shown by the dashed arrow in Fig. 4. In other words, the hair that comes into contact with the edge 312f of the blade 312 is smoothly released as if being flicked from the base end 312a side of the blade 312 toward the outer periphery 312b side as the axial fan 31 rotates. Therefore, the wearer's hair can be prevented from being caught in the axial flow fan 31 that draws in air.

[0036] Such a hair entanglement prevention structure is not limited to the configuration described above, and may be formed, for example, by a blade 312 having an edge 312f arranged at the front in the rotational direction along a straight line L1 extending radially from the center of the axial fan 31 to the outside, and opposing edges 321s of a vertical rib 321 arranged along a straight line L2 inclined at a predetermined angle θ toward the rotational direction from the straight line L1 extending radially from the center of the axial fan 31 to the outside.

[0037] In addition, the hair entanglement prevention structure may be formed, for example, by blades 312 having edge portions 312f at the front in the rotational direction, which are arranged along a straight line L2 inclined opposite to the rotational direction from a straight line L1 extending radially from the center of the axial fan 31 to the outside, and opposing edge portions 321s of vertical ribs 321 arranged along a straight line L2 inclined toward the rotational direction from a straight line L1 extending radially from the center of the axial fan 31 to the outside.

[0038] That is, either one of the edge 312f at the front in the rotation direction of the blade 312 and the opposing edge 321s of the vertical rib 321 may be formed at a predetermined angle, or both may be formed at a predetermined angle. In this case, it is desirable that the predetermined angle be, for example, 7 degrees to 10 degrees extending from the center of the axial fan 31 (base end 312a of the blade 312) toward the outside.

[0039] As shown in FIG. 5, the air blowing means 3 has a structure for preventing hair from getting caught in the cover member 32. The cover member 32 has a ring-shaped protruding portion 323 that protrudes toward the base end 312a of the blades 312 of the axial fan 31 without coming into contact with the blades 312 at a position that covers the vicinity of the base end 312a of the blades 312 of the axial fan 31. In other words, the upright protrusion 323 is formed by a part of the frame supporting the motor 311 in the cover member 32 (for example, the back side of the horizontal rib 322) protruding in a wall-like shape toward the base end 312a of the blade 312.

[0040] In this way, by providing the cover member 32 with the upright protrusion 323 at a position covering the vicinity of the base end 312a of the blades 312 in the axial fan 31, it is possible to prevent the upright protrusion 323 from acting as a wall to cause the wearer's hair to get caught on the axial side of the axial fan 31.

[0041] As shown in FIG. 5, the air blowing means 3 has a structure for preventing hair from getting caught in the axial flow fan 31, in which the base end 312a of the blade 312 has an annular hanging convex portion 313 that protrudes toward the cover member 32 without coming into contact with the cover member 32. That is, the hanging protrusion 313 is formed such that the base end 312a side of the blade 312 covering the outer periphery of the motor 311 protrudes in a wall shape toward the cover member 32 side.

[0042] In this way, by providing cover member 32 with hanging convex portion 313 at base end 312a of blade 312, hanging convex portion 313 can be prevented from acting as a wall to prevent the wearer's hair from getting caught on the shaft side of the fan.

[0043] Furthermore, the cover member 32 has an upright protrusion 323 at a position covering the vicinity of the base end 312a of the blades 312 of the axial fan 31, and the axial fan 31 has a hanging protrusion 313 at the base end 312a of the blades 312. As a result, the upright protrusion 323 of the cover member 32 and the hanging protrusion 313 of the axial fan 31 combine to form a gap 33 with a complex shape like a curved road bent at right angles, which makes it even more effective to prevent the wearer's hair from getting caught on the axis of the fan.

[0044] The helmet 10 configured as described above is provided with a circular mesh-shaped cover member 32 with an opening area wider than the non-opening area, thereby preventing the wearer's hair from getting caught in the axial fan 31 while suppressing the pressure loss caused by suction from the wearer's head side, thereby improving ventilation performance.

[0045] Therefore, it is possible to forcibly ventilate the entire head of the wearer, creating a comfortable head environment, reducing discomfort caused by heat, and improving workability without causing a decrease in the amount of wind (air volume) discharged to the outside of the hat body 1. In other words, it is possible to obtain a more refreshing and comfortable cool feeling. Furthermore, by adjusting the design of the air passage 22 to adjust the amount of air exhausted from the lower front side of the helmet 10, the risk of the wearer's glasses or goggles fogging up can be avoided.

[0046] Although not shown, a battery that serves as a power source for the axial fan 31 is provided at a position corresponding to the back of the head of the hat body 1. This battery is provided with a power switch for optionally starting the axial fan 31. It is also preferable that the battery body can be freely inserted and removed and that the battery body can be replaced. Furthermore, the location of the battery is not limited to the area of ​​the cap body 1 that corresponds to the back of the head, but may be any appropriate location such as the outer surface of the cap body 1. [Industrial Applicability]

[0047] The helmet equipped with the air blowing function of the present invention is not limited to use when working in factories or construction sites, but is also expected to be used when riding motorcycles, bicycles, racing cars, etc. [Explanation of symbols]

[0048] 1. Hat body (helmet body) 2. Shock absorbing liner (shock absorbing molding material) 3. Delivery Method 10. Helmet 21 Air intake 22 Air passage 23 Convex part 31 Axial fan 32 Cover member 33 Gap 311 Motor 312 Feather 313 Drooping convex part 321 Vertical ribs 322 Horizontal ribs 323 Standing protrusion

Claims

1. The helmet body protects the head from impacts, A shock absorbing molding material that constitutes an interior body disposed inside the helmet body and is formed into a shape that can be worn on the head of a wearer; a blowing means attached to an air suction port provided in the impact absorbing molding material; The present invention is configured to include at least the impact absorbing molding material is provided with an air passage on one surface of the helmet body side, the air passage connecting the air suction port to which the air blowing means is attached and the outside of the helmet body, The air blowing means has an axial fan that draws in air from the wearer's head side and expels the air through the air passage to the inside of the helmet body and to the outside of the impact absorbing molding material, and a circular mesh-shaped cover member with an opening area wider than a non-opening area that is interposed between the wearer's head and the axial fan to prevent the wearer's hair from coming into contact with the axial fan, and the helmet is characterized in that it further has a hair entrapment prevention structure that prevents the wearer's hair from being entrapped in the axial fan as the air is sucked in.

2. The hair entanglement prevention structure is formed by blades of the axial flow fan and vertical ribs extending radially from the center of the axial flow fan to the outside of the cover member, The helmet according to claim 1, characterized in that, when the wing and the vertical rib intersect in a planar direction, the edge of the wing at the front in the rotational direction and the edge of the vertical rib located on the opposite side to the edge are formed at an angle that gradually expands so as to intersect from the center side of the wing toward the outside.

3. 3. The helmet according to claim 2, characterized in that the hair entanglement prevention structure is formed by the blades having edges at the front in the rotational direction along a straight line that is inclined at a predetermined angle opposite to the rotational direction from a straight line extending radially outward from the center of the axial fan, and the vertical rib that is provided along the straight line extending radially outward from the center of the axial fan.

4. 3. The helmet according to claim 2, characterized in that the hair entanglement prevention structure is formed by the blades having edges at the front in the direction of rotation that are arranged along a straight line that extends radially from the center of the axial fan outward, and the vertical ribs arranged along a straight line that is inclined at a predetermined angle toward the direction of rotation from the straight line that extends radially from the center of the axial fan outward.

5. 3. The helmet according to claim 2, characterized in that the hair entanglement prevention structure is formed so as to be inclined at a predetermined angle as a whole by the blades having edges at the front in the rotational direction along a straight line that is inclined opposite to the rotational direction from a straight line that extends radially from the center of the axial fan outward, and the vertical rib that is inclined toward the rotational direction from the straight line that extends radially from the center of the axial fan outward.

6. 3. The helmet according to claim 2, wherein the hair entanglement prevention structure includes a protruding protrusion that protrudes from the cover member at a position that covers the vicinity of the base end of the blade of the axial flow fan without coming into contact with the blade.

7. 3. The helmet according to claim 2, wherein the hair entrapment prevention structure includes a hanging convex portion that protrudes from a base end of the blade of the axial fan without coming into contact with the cover member.

8. 3. The helmet as described in claim 2, characterized in that the hair entanglement prevention structure includes an upright protrusion that protrudes from the cover member at a position covering the vicinity of the base end of the blade of the axial fan without coming into contact with the blade, and a hanging protrusion that protrudes from the base end of the blade of the axial fan, located inside the upright protrusion of the cover member without coming into contact with the cover member.

9. 2. The helmet according to claim 1, wherein the air passages are formed along positions that correspond to the forehead, both left and right heads, and the back of the head when the wearer covers the head with the impact absorbing molding material.

10. 2. The helmet according to claim 1, wherein the shock absorbing molding has a convex portion on the rear side of the head that protrudes toward the helmet body.

Images