JPH0617303A - Protective helmet - Google Patents

Abstract

PURPOSE: To improve a protective helmet utilized by an operator in an industrial environment. CONSTITUTION: This protective helmet comprises a visor 30 capable of freely entering and emerging from a shell 2, provided with each ear protecting tool 60 in a lateral part in the shell 2 and the ear protecting tool 60 has the substantially same constitution as that of a contour of the shell 2 in the protective helmet having the protective shell 2 in order to surround the head of a user and the visor 30 arranged at the front of shell 2. The helmet has an air duct 22, having an inlet installed in the rear of the shell 2 and plural outlets 20, assembled at the front of the shell 2, directed to the inner surface of the visor 30 and the boundary edge parts of the visor 30 extending adjacently to the face of the user at the time of use and divided in the shell 2, a filter 16 assembled in the duct 22 and an air flow device 24 for feeding air into the duct 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to improvements in protective helmets utilized by workers in industrial environments.

In particular, the present invention relates to, but is not limited to, a helmet required for a very dangerous place where head protection is required, that is, a quarrying site. Such protection is necessary not only to avoid physical injury, but also to minimize damage to the respiratory system, hearing, sight, and smell.

[0003] Protective helmets, which are power helmet masks, are known and have a protective shell in which filtered air is placed between the wearer's face and the visor. Means for introducing are provided. The visor is fixedly mounted on the shell and is pivotally mounted on the outside of the shell to allow movement to and from a working position (ie, a protective position) in front of the wearer's face.

It is also known to provide protective helmets with ear protectors mounted on the outside of the shell and rotatable between working and non-working positions. However, by arranging the ear protector on the outside of the shell, the ear protector has a problem in that the ear protector is caught in the device and makes the operator uncomfortable, which is damaged, and is dropped from the helmet.

When a known power helmet mask is provided with a mask fan, a filter, a visor and an ear protector, it has the unfavorable characteristics that it is difficult to handle, heavy and easily loses its balance.

Therefore, it is an object of the present invention to improve a protective helmet so as to solve the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a protective helmet having a protective shell for enclosing a wearer's head, and a visor arranged at the front of the shell, the visor entering and exiting the shell. The shell is provided with ear protection on each side thereof, the ear protection being a protective helmet having substantially the same configuration as the contour of the shell, The entrance provided and built into the front of the shell, the inner surface of the visor,
And an air duct defined in the shell having a plurality of outlets directed to the border edge of a visor extending adjacent the wearer's face during use, and in the duct. This is a configuration including a built-in filter and an air flow device that sends air into the duct.

More particularly, the air duct extends from the occipital region and terminates at the outlet in the front of the shell, the outlet being in a working position in front of the wearer's face during use of the visor. When the visor extends, air is supplied to the top of the visor, and thus the inside of the visor is blown off with air. More preferably,
A plurality of outlets are provided for the air duct, the outlets being oriented in a direction such that air blows through the interior of the visor in use, and the boundary of the visor extending close to the wearer's face. Oriented towards the edges, it provides a hermetic seal around the visor to minimize the ingress of harmful air pollutants.

The protective inner skin is preferably spaced apart from the shell and disposed within the shell to form a duct between the inner surface of the shell and the inner skin. The air duct extends substantially the entire length between the shell and the inner skin, the inner skin bifurcated at the front of the shell to provide multiple outlets and access spaces for the visor. Has been done.

The shell preferably has an outer wall at the rear and an inner wall at the front, and the front is provided with a cover for defining a channel through which the visor can be inserted and removed. An example of this cover is formed so as to be substantially continuous with the outer shape of the helmet. A suitable cover is removable and properly secured.

The filter preferably extends into the duct across the inlet and the air flow device is located in the duct behind the top of the shell. This air flow device
It is preferably constituted by at least one fan driven by a battery.

The visor is preferably removably attached to a carrier for supporting the replaceable transparent member which itself constitutes the visor. Alternatively, the carrier may comprise a frame into which a transparent member may be inserted.

The visor is preferably slidably mounted inside the shell by side supports each having a slot, and a bush provided on the carrier engages the slot for use in the visor. It is possible to move in and out from the work position in front of the wearer's face by sliding.

Each ear protector is preferably provided such that it is substantially contained within the outline of the helmet, so that
In use, it is possible to eliminate the protrusion that causes damage due to being caught.

By providing an eaves on the front part of the shell and providing a protection side plate on the front part of the shell for complementing the visor and the ear protector at the time of use, a continuous shape is formed around the wearer's face. Can be Said side plate constitutes a tight seal between the frame of the visor and the face of the wearer and can thus considerably prevent contaminated air from entering laterally.

A mounting member for mounting a lamp used for underground mining work may be provided on the front portion of the shell, and the lamp is a battery-driven type. In the above-described embodiment, the mounting member may be provided on the front cover of the helmet. Further, the detachable cover may be provided with some flexibility, and various attachments may be provided in a desired range.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, reference numeral 1 is a protective helmet that is a power helmet mask placed on the wearer's head 3, and this mask has a rear portion 4, a top portion 6, and a front portion 8. And a protective shell 2 having a side portion 10. A head harness (not shown) for properly fixing the mask to the head 3 of the wearer is provided inside the protective shell 2.
Is provided.

The inner skin 12 extends from the rear part 4 to the front part 8 and, in the occipital region of the inner skin 12, traverses an air inlet (hereinafter referred to as an inlet at the end) 14, a filter made of a suitable fiber material. 16 are provided. The filter 16 is clipped in the holder 13 and can be easily attached and detached or replaced.

Another inner skin, shaped to fit the rear 4, top 6 and front 8 of the shell 2, passes through the rear 4, top 6 to terminate in a plurality of slot-shaped outlets 20, and further It extends downwards through the front part 8.
Therefore, the air duct 22 is, inside the shell 2, the inner surface of the inner skin 12 and the inner surface of the inner skin (which has a shape adapted to the rear portion 4, the top portion 6 and the front portion 8) different from the inner surface. Formed during.

The front cover 9 is fixed to the shell 2 and has a shape that makes the outer shape of the helmet smooth, and is provided in the front portion of the front portion 8 through the space 42. The visor 30 can be retracted.

An air flow device comprising two battery-driven fans 24 is arranged in the duct 22 and fixed behind the top 6 of the shell 2 via a sound absorbing mount 26. The fan 24 is preferably driven by a battery pack (not shown) fixed to the body, and this battery pack supplies electric power to the fan 24 and at the same time, a bracket (mounting member) provided on the front portion 9. ) 29, a lamp (not shown) that is detachable from the lamp has a capacity capable of supplying electric power.

The visor 30 is provided with a carrier 32 which is detachably fixed to a window 34 which is a transparent member, and the window 34 is attached to the carrier 32 by a bush 39.
To the support portion 38 fixed on the side of the shell 2 via
It is mounted so that it can slide and rotate freely. The support portion (support arm) 38 has a curved slot, and the bush 39 can slide in this slot.

The visor 30 has a structure which can be freely moved in and out of a space 42 defined between the front portion 8 of the shell 2 and the inner wall of the outer front cover 9. Visor 30
Has a stop portion for abutting against a changeover switch (not shown), and as a result, when the visor 30 sufficiently covers the front surface of the wearer's face, power supply to the fan 24 is started. It In this position, the visor 30 is sealed to the inner surface of the front cover 9 by the sealing strip 21. Alternatively, visor 30
May be sealed to the outer surface of the front portion 8 of the shell 2 along the lower edge thereof. By performing limited rotation about the lower bush 39, the lower portion of the visor 30 can be brought closer to the wearer's face, and such limited rotation causes the upper bush 39 to move. This is achieved by a small recess in the slot in the displaceable support 38. As will be described later, the visor 30
By using it in cooperation with the ear protector 60 and the side plate 52 provided on both sides 10 of the shell 2, a wide range of protection can be provided for the front and side of the wearer's face.

Further, in order to reduce the distance between the edge of the visor 30 and the face of the wearer, the visor 30 is provided with a proximity seal (not shown) within a predetermined range so that the visor 30 has a breathing region within Ingress of polluted air into the can be minimized.

With reference to FIG. 1, a powered helmet mask 1
The ear protector 60 shown on one side is fixed to the shell 2. Also, on the other side of the shell 2, an ear protector (not shown) corresponding thereto is provided. The ear protector 60 has a shape that substantially matches the outer shape of the helmet mask 1.

With particular reference to FIGS. 3 and 4, ear protector 60.
Has an outer cover 101, which is
While making an attachment to the helmet mask 1,
It has a main body shell 102 which is a main part of the ear protector 60. The body shell 102 is attached to the back plate 103 with an opening at a predetermined interval, and the sound absorbing material 10 is placed within this interval.
4 is enclosed.

The cruciform spring 105 is positioned and held in the main body shell 102, and is engaged with a knob (biasing means) 106 capable of making a telephone call.
The 06 is provided with a sealing surface 106a that abuts a seat portion 114 formed around an orifice 114a penetrating the body shell 102 in the axial direction. Therefore, in use, when the knob 106 is pressed against the spring 105, the orifice 114a is opened, and sound is directed toward the wearer's ear via the opened back plate 103 and the ear protector 60.
Pass inside. Further, when the pressing of the knob 106 against the spring 105 is stopped, the knob 106 is returned to the sealing position with respect to the orifice 114a, and as a result, the ear protector 6
Restore to the point where noise is attenuated by 0.

The ear seal 113 is fixed to the back plate 103 at a position comfortable to the wearer, and forms a seal body that contacts a part of the head of the wearer in the vicinity of the periphery of the ear.

The linear spring 107 supports the main body shell 102 inside the outer cover 101, and even when the main body shell 102 is pushed into the outer cover 101, the spring 107 uses the “centering” principle. By body shell 10
Holds 2. When the body shell 102 is pushed in the opposite direction, the spring 107 pushes the ear shell 113 against the wearer's head with a correction pressure that provides noise attenuation. The spring 107 is attached to the outer cover 101 via a vibration damper 108.

When using the ear protector 60, the earpiece of the telephone is set to the knob 1 so that the telephone can be used.
Sufficient force is applied to the knob 106 such that it contacts the 06 and pushes down the spring 105 via the knob 106 to open the orifice 114a. Then, since the outside of the earpiece comes into contact with the seal 110 provided on the body shell 102, noise entering from the outside can be eliminated. Therefore, the sound from the earpiece of the telephone can be transmitted to the ear of the wearer through the orifice 114a, the main body shell 102 and the back plate 103 with an opening. When the contact between the earpiece and the knob 106 is released, the ear protector 60 automatically returns to the noise attenuation mode sufficiently.

The reflective strip 109 includes a body shell 10
When the ear protection device 60 is not securely attached and is in the non-working (standby) position, that is, when the sound is not reliably attenuated, the reflection strip 1 is wound around a part of the circumference of the reflection strip 1.
09 can be seen from the outside while coming out from the outer cover 101. Then, when the ear protector is securely attached and in the working position, the reflection strip 109 cannot be easily confirmed.

The outer cover 101 can be adapted to the width of the wearer's head by fitting the outer cover 101 to one of several positions with means for attaching to the helmet. . The attachment is accomplished by screws 112 or other suitable means.

A relatively rear portion of the outer cover 101 is provided with a pair of tabs 115. The tabs 115 are
It has a series of holes that can accommodate visor restraining pegs 111. By fixing the pegs 111 in a pair of holes that are most suitable for the wearer, the visor can be held close to a distance that does not contact the wearer's face, and an effective position where the visor fits well is provided. can do.

In use, with the visor 30 housed in the space 42 and the fan 24 stationary, the helmet 1 is first worn to fit the wearer's head.
Then, the visor 30 is lowered to the working position as shown in FIG. At the same time, by turning on a changeover switch (not shown), electric power is supplied to the fan 24, and an air flow is introduced into the duct 22 and the outlet 20 through the inlet 14 and the filter 16. Then, by causing this airflow to flow downward between the visor 30 and the face of the wearer, it is possible to ventilate the filtered air and at the same time obtain a cooling effect. Due to the slotted outlet 20 and the close fitting of the visor 30 to the side plate 52 and the ear protector 60, the air curtain presents a concentrated flow to flow around the wearer's nose and mouth, Airflow can be expelled from between the lower edge of the visor 30 and the wearer's chin, and from the bottom of the side plate.

The ear protector 60 is the shell 2 of the helmet 1.
Being housed within the outer shape of the, there is no protrusion that would cause disaster. Further, when the completely integrated custom-made helmet according to the present invention is used for work, noise can be effectively attenuated by accommodating the ear protector in the outer shape of the shell.

Accordingly, the present invention provides a powered helmet mask that has any versatile property and is easier to handle and lighter than conventional. Further, it becomes easy to replace the filter and the visor, and as a result, the cost and time required for the repair can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a usage state of a protective helmet of the present invention.

FIG. 2 is a plan view of the protective helmet of the present invention.

FIG. 3 is an exploded perspective view of an ear protector forming a main part of the protective helmet of the present invention.

FIG. 4 is a cross-sectional view showing an ear protector.

[Explanation of symbols]

 2 Shell 14 Inlet 16 Filter 20 Outlet 22 Air duct 24 Air flow device 30 Visor 60 Ear protector

Claims (21)

[Claims] 1. A protective helmet having a protective shell for enclosing a wearer's head and a visor arranged at the front of the shell, wherein the visor (30) enters and leaves the shell (2). The shell (2) is freely provided with an ear protector (60) on each side thereof, and the ear protector (60) has substantially the same configuration as the contour of the shell (2). A protective helmet, comprising an inlet (14) provided at a rear portion of the shell (2) and a front portion of the shell (2),
The shell (2) having an inner surface of the visor (30) and a plurality of outlets (20) directed towards the border edge of the visor extending in use adjacent the face of the wearer.
An air duct (22) defined therein, and a filter (16) incorporated in said duct (22)
And an air flow device (2) for sending air into the duct (22).
4) A protective helmet comprising: 2. The air duct (22) extends from the occipital region to the outlet (2) at the front of the shell (2).
0), this exit (20) is a visor (30)
When the visor (30) extends to a working position in front of the wearer's face when using the visor (3),
0) supply air to the top and thus the visor (30)
The protective helmet according to claim 1, wherein the inside of the protective helmet is blown off by air. 3. A plurality of outlets (20) are provided for the air duct (22), the outlets (20) being oriented in a direction such that air blows out the interior of the visor (30) in use. And directed toward the border edge of the visor (30) that extends close to the wearer's face and is airtight around the visor (30) to minimize the ingress of harmful air pollutants. A protective helmet according to claim 1 or 2, characterized in that it provides a seal. 4. The shell (2) comprises a helmet (1).
The outer shape of the front part is provided at the rear part, and the front part is formed in a step shape,
A cover (9) which is detachable at a distance from the front portion is arranged to form a space portion into and out of which the visor (30) can come and go, and the cover (9) is attached to the outer shape of the helmet (1). The protective helmet according to claim 1, wherein the protective helmet is formed so as to be continuous with the protective helmet. 5. The filter (16) comprises the inlet (1).
Protective helmet according to any one of the preceding claims, characterized in that it extends in the duct (22) so as to traverse 4). 6. The air flow device (24) is arranged in the duct (22) downstream of the filter (16) and behind the top of the shell. The protective helmet according to any one of 5 above. 7. A protective helmet according to claim 1, wherein the air flow device (24) comprises at least one fan. 8. The visor (30) according to claim 1, further comprising a carrier (32) detachably fixed to a transparent member (34). The listed protective helmet. 9. The visor (30) comprises at least one visor.
Protective helmet according to any one of the preceding claims, characterized in that it is slidably mounted inside the shell (2) by means of one support arm (38). 10. Each ear protector (60) is mounted on the shell (2) and the components of the ear protector (60) are movable between a non-working position and a working position. The protective helmet according to any one of claims 1 to 9, which is characterized in that. 11. The protective helmet of claim 10, wherein the ear protector (60) is configured to contact the ear area to achieve noise attenuation in the working position. 12. The inner part of the ear protector (60) comprises:
The protective helmet according to claim 11, wherein the protective helmet is configured to be in mechanical contact with the ear region. 13. The ear protector (60), in its working position, is configured to contact the ear area and block sound penetrating the ear protector.
The protective helmet according to 1 or 12. 14. The sound transmission path formed in the ear protection device is opened by pressurizing the ear protection device (60) to allow the passage of sound. The protective helmet according to claim 13. 15. The ear protector (60) has an outer cover (101) detachably attached to one side of the helmet.
And a body shell (102) mounted in the outer cover (101) for moving a working position to a non-working position, and a sound transmission orifice provided in the body shell (102). (114a), elastic biasing means (106) for sealing the orifice (114a), and a sound absorbing material (104) provided in the main body seal (102). The protective helmet according to claim 14. 16. A linear spring (10) is provided for mounting the body shell (102) in the outer cover (101).
16. A protective helmet according to claim 15, characterized in that it is achieved by 7). 17. The biasing means (106) is a cross spring (105) provided in the body shell (102).
The protective helmet according to claim 15 or 16, further comprising: 18. The biasing means (106) for sealing the orifice (114a) comprises an actuating knob, the knob comprising a seat (114) formed around the orifice (114a). Seal surface (11
6a) is provided.
7. The protective helmet according to any one of 7. 19. The visor (30) and the ear protector (6) on the front of the shell (2) for use.
0) is provided with a protective side plate that complements the gap between the wearer's face and the wearer's face continuously.
19. The protective helmet according to any one of 18 to 18. 20. The protective helmet according to claim 1, wherein a mounting member (29) for a lamp is provided on a front portion of the helmet (1). 21. The protective helmet according to claim 1, wherein the air flow device (24) is of a battery drive type.