KR20150012430A - lantern mounted on the firefighting helmet - Google Patents

Abstract

The present invention relates to a lantern mounted on a fire helmet which is mounted on the helmet of a fireman put in fire suppression, improves safety by securing fireman′s view, copes with emergencies by attaching/detaching a lantern with a slide type, and easily controls angles. The lantern includes a casing which is combined with a battery and has a mounting member in an outside thereof; a head part which has a cylindrical housing is assembled in the front side of the casing and has an LED lamp module of emitting light to the inside of the housing; an end cap which has an end part combined with the back side of the casing and a press button in a back end part thereof; a back side lighting part which is installed in the end cap, has a switch connected to the press button, and has an LED lamp which is electrically connected to the switch and emits light to the press button; an electric connection part which has a (+) polarity moving path and a (-) polarity moving path to transmit the electric energy of the battery to the back side lighting part and the LED module; and a holder which has an insertion part fitted into the mounting member of the casing by a slide type, and has a clamp which is formed in the upper part of the insertion part and is attached to/detached from the lateral edge of the helmet.

Description

A lantern mounted on the firefighting helmet

The present invention relates to a fire helmet binding type lantern.

More specifically, it is attached to a helmet of a firefighter entering the fire, securing the view of the firefighter and securing safety, and allowing the lantern to be attached and detached in a slide form so as to quickly respond to an emergency, And which is easy to use.

In addition, the present invention provides an LED lamp module on the front side of the lantern so as to ensure a front view, and at the same time a light is irradiated to the rear side so that a firefighter inserted in the field can recognize an ex- The present invention relates to a helmet-type fire-fighting lantern.

The present invention also relates to a fire helmet detachable lantern which is excellent in durability, is easy to handle, and can be hand-held as well as fastened to a helmet.

Generally, firefighters are always exposed to risks by entering into emergency situations such as fire entering, building collapse, natural disaster, and rescue activities.

Therefore, the firefighter wears a helmet which protects the head as well as mittens and safety shoes made of fireproof clothing, and holds a compartment and a portable lighting device such as a lantern for breathing fresh air. do.

Conventional lanterns are indispensable equipment for ensuring visibility in a power failure accompanied by a fire, self-destruction or collapse of a building. However, it is difficult to attach and detach a lantern due to a battery and a lamp. It is difficult to control the angle of the firefighting machine.

Accordingly, in recent years, firefighting lanterns having various functions have been developed in order to secure the safety of firefighters, and there is a multifunctional lantern disclosed in Korean Patent Laid-Open No. 10-2010-0070756.

The lantern includes a lantern unit having a lamp, a ballast for driving the lamp, and a motion sensor for detecting motion; A power supply switch for supplying power to the lantern unit, a control unit for receiving and controlling a signal input from the lantern unit, a position display alarm unit for displaying and warning a position by receiving a control signal from the control unit, a battery for supplying driving power to the lamp, And a battery display unit for displaying the remaining amount of the battery; And a camera for photographing an operation progress of the lantern; The main body includes a memory card for storing a signal photographed by a camera; And a transmitter for transmitting a signal photographed by the camera to the outside in a wireless signal.

In addition, the camera includes a microphone for inputting sounds or voices generated during operation, and the lantern unit is provided with a fixing bracket capable of adjusting a light adjusting angle, and is coupled to the helmet by the fixing bracket and the vacuum suction plate.

However, although such a lantern imposes various functions to secure the safety of a firefighter, there is a possibility of causing a malfunction in a real scene where there is a lot of moisture and heat, and even if a lantern is installed in a helmet, The lantern and the fixed bracket fixing the lantern are always equipped with the helmet so that the weight of the helmet is increased and thus the operation of the firefighter is made more difficult. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a helmet which can be slidably attached to and detached from a helmet to facilitate installation and disconnection of the lantern, Helmet detachable lantern.

Another object of the present invention is to provide a fire helmet detachable lantern in which a holder for binding a lantern to a helmet is freely rotatable so that a firefighter can adjust the angle of the lantern.

It is a further object of the present invention to provide a firefighting system in which light is irradiated from the front side and the rear side of a lantern so as to secure a field of view of the front side light and a rear fire side to measure the location and the distance to the other firemen, And to provide a fire helmet detachable lantern capable of enhancing the efficiency of work by recognizing the side or the front man, as well as being able to secure safety.

In addition, the present invention can reduce the volume of the lantern and reduce the weight of the lantern by using a single battery so that the front and rear LED lamps can emit light at the same time. Fire helmet detachable lantern.

The present invention relates to a lantern installed in a helmet of a firefighter, comprising: a casing having a battery inserted therein and a coupling member protruding from an outer surface thereof; A head unit having a cylindrical housing assembled on the front side of the casing and equipped with an LED lamp module for irradiating light inside the housing; An end cap coupled to the rear side of the casing and having a push button at a rear end thereof; A rear lighting unit provided inside the end cap and having a switch connected to the push button, the LED lamp electrically connected to the switch illuminates light in a push button direction; An electric connection part having a (+) pole travel path and a (-) pole travel path so that the electric energy of the battery is transmitted to each of the rear side lighting part and the LED module; And a holder having a fitting portion that is slidably fitted to the binding member of the casing, and a clamp is provided on the fitting portion and is detachably attached to a side edge of the helmet.

The holder of the present invention comprises a clamp having a " C "-shaped fitting portion fitted in the rim of the fire helmet and a through hole formed at the center of the extending piece integrally extending to the fitting portion, The upper part of the coupling member is inserted into the through hole and the lower part is provided with a fitting part so that the coupling member of the casing is engaged in a slide manner In the configuration, when the lantern assembled in the fitting portion is rotated, the angle of the lantern is adjusted by rotating around the rotation axis of the engaging member.

In addition, the casing has a male thread portion on each of both outer and outer sides, a housing of the head portion is screwed to the front end, and an end cap is connected and assembled to the rear end, The fixing member provided on the outer side surface of the guide rail protrudes from the guide rail on both sides of the smooth bottom surface,

And a fitting portion of the holder is sandwiched in a slide form between the guide rails.

According to the present invention, a mounting hole is drilled in the inside of the coupling member, an escape prevention ball and a supporting spring are inserted into the mounting hole, a fixing member is screwed to a screw portion formed on the upper side of the mounting hole, So as to be elastically supported.

In the present invention, the rear side lighting unit includes a lamp support that is connected to a push button, the lamp support includes a lamp substrate having an LED lamp mounted on a rear surface thereof, the other side is connected to a switch, The second substrate is provided on the other side of the first substrate, and the first substrate, the switch, the second substrate, and the lamp substrate are electrically connected to each other,

The first and second substrates are connected to an electrical connection unit to supply electrical energy to the battery.

Further, the present invention is characterized in that the electric connection portion has a battery terminal piece at the tip end of the casing so that the positive electrode of the battery is closely contacted and connected, and the first large-diameter spring fitted to the inside of the casing is resiliently attached to the terminal piece, And a second large diameter connection spring provided inside the connection cap is in close contact with the first substrate of the rear side lighting part to connect the (+) pole and the (+) pole And having a movement path.

The present invention is an invention that can easily attach and detach a lantern in a slide type to a holder mounted on a helmet, and can quickly cope with a lantern attached to or carried on a helmet according to a situation in the field.

Second, since the holder for mounting the lantern on the helmet freely rotates, the angle of the lantern connected to the helmet can be adjusted.

Third, according to the present invention, light is irradiated to each of the front side and the rear side, thereby securing the visibility, recognizing who is the front or side person, enabling the distance measurement with the front person, There is an effect that can be prevented.

Fourth, according to the present invention, the front and rear LED lamps are lit by using one battery, thereby reducing the volume and weight of the lantern, thereby minimizing the burden on the firefighter working under bad conditions.

1 is an exploded perspective view of a lantern according to the present invention,
2 is a front sectional view of a lantern according to the present invention,
3 is a front sectional view of the lantern main body according to the present invention,
4 is an enlarged cross-sectional view of a main part of a lantern according to the present invention,
5 is a sectional view of a casing applied to the lantern of the present invention,
FIG. 6 is an enlarged view of a main part of a holder applied to the present invention. FIG.

In the description of the embodiments of the present invention, the same reference numerals denote the same components, and additional descriptions that may overlap or limit the meaning of the invention may be omitted from the description of embodiments of the present invention.

Before describing the present invention in detail, it should be understood that although the singular expression is used in the present specification, in view of the environment in which the singular / plural is not clearly distinguished in the use of Korean, And is used in a sense to include plural expressions unless it is contrary to the concept and is not interpreted contradictory or expressly different from the meaning. Also, it is to be understood that the phrase " comprises, "" including, "Quot; or " an " or " an " should be understood to not preclude the presence or addition of one or more other features, elements, or combinations thereof.

Although the lantern of the present invention is mainly described as being mounted on a helmet of a firefighter, it is natural that the lantern can be used in other forms.

For example, it can be useful for exploring marine police helmets, land and air force helmets or caves, and can also be applied to all helmets, such as construction helmets, especially on work sites such as drilling sites or underground mines.

The present invention is not necessarily required to be mounted on a helmet. Clothes, belts, bags or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

1 is an exploded perspective view of a lantern according to the present invention, FIG. 2 is a front sectional view of a lantern according to the present invention, and FIG. 3 is a front sectional view of a lantern main body according to the present invention.

FIG. 5 is a sectional view of a casing applied to a lantern according to the present invention, and FIG. 6 is an enlarged view of a main part of a holder according to the present invention.

The lantern 10 of the present invention includes a head unit 100 having an LED lamp module 140 emitting light, a casing 200 having a battery 202 inserted therein, An end cap 300 coupled to the rear end of the end cap 300 and having a push button 322 protruding outwardly and pressed by a firefighter; Side light emitting portion 400 formed of an LED lamp connected to the switch 420 and irradiating light to the rear side, and a rear side light emitting portion 400 connected to the binding member 220 of the casing 200 in a slide- And a holder 600 equipped with a clamp which is detachably attached to a side edge of the firefighter helmet at an upper portion of the fitting portion.

Further, the present invention includes an electrical connection part (500) which electrically connects the front side and rear side lighting parts to the battery so that when the fire button presses the push button, these front side and rear side lighting parts are turned on or off at the same time .

In the head part 100,

The head unit 100 includes a housing 120 assembled to the front end of the casing 200 and a front LED lamp module 140 installed inside the housing 120.

The housing 120 has a cylindrical shape and is internally threaded on a rear end of the housing 200 to be screwed to the front end of the casing 200. A transparent cover is disposed on the front surface of the housing 120. A reflector 144 and an LED lamp 142 are disposed inside the transparent cover. Side LED lamp module 140 is installed to illuminate the front side so that a firefighter inserted in the field can secure a field of view in case of a power failure due to a fire accident, earthquake or natural disaster.

The front side LED lamp 142 is mounted on a substrate, and is connected to the substrate to provide a spring. The spring is composed of a large diameter spring 160 and a small diameter spring 162. The large diameter spring 160 is connected to the negative pole and the small diameter spring 162 is connected to the positive pole, Will be described later.

The casing (200)

The casing 200 is formed of a cylindrical tubular body, and a male screw portion is formed on each of the front end and the rear end outer side so that the housing 120 of the head portion 100 is screwed. 300), and the male screw portion is constituted by a negative (-) male threaded connection portion 240 to which electrical connection is made in a separated state.

In other words, in the present invention, the casing 200 and the end cap 300 to be described later are formed of a conductor metal such as silver, copper or aluminum, and the inner and outer surfaces of the metal are covered with an insulating layer , And a part of the coated insulating layer is peeled off so that electrical connection is made.

The negative electrode connection portion 240 is formed by separating a male screw portion formed on the outer surface of the rear end of the casing 200 and forming a negative electrode connecting portion 242 by separating the step inner circumferential surface and the step portion And the large diameter spring 160 is connected to the negative electrode connection portion 242 so that the negative (-) electrode is connected to the LED lamp module 140.

A cylindrical electric connection pipe 520 is inserted into the casing 200 and a battery 202 is inserted into the electric connection pipe 520. The outer surface of the casing 200 is connected to a connection member (Not shown).

The bottom surface 224 of the flat surface 224 and the bottom surface 224 of the bottom surface 224 are connected to each other by a holder And a guide rail 222. The holder 600 is inserted between the guide rails 222.

Each of the guide rails 222 has an upper end folded inward to form a "A" shape to prevent the holder from coming off. The bottom surface 224 is formed by flattening the outer surface of the casing 200 So that the holder 600 can be easily assembled or disassembled.

End cap 300,

The end cap 300 is a cylindrical tubular body passing through the front and rear sides and includes a negative pole female thread connecting portion 340 for allowing a female thread portion formed on the inner end surface of the tip end portion to be screwed with the negative pole contact portion 240, .

A protruding piece 360 protruding toward the center is provided on the rear side of the end cap 300. The protruding piece 360 protrudes outwardly from the inner opening 320 of the protruding piece 360 and is pressed by a firefighter, The push button 322 is transparent or semitransparent so that the light can be irradiated. The switch 420 is operated integrally or separately on the inside of the push button And a plunger 324 is provided.

The rear side lighting unit 400,

The rear side lighting unit 400, which is one of the core technologies of the present invention, is turned on simultaneously with the LED lamp module 140 installed on the front side so that a firefighter inserted in the field can recognize the side or the front side, , Prevent safety accidents in advance, and recognize the person who is in front of the person or the person in the vicinity, thereby improving the safety and the efficiency of the work.

To this end, the present invention includes a rear side lighting unit 400 inside the end cap 300. The rear side lighting unit 400 includes a switch 420 and first and second substrates 440 and 442 ), And a lamp support 460.

The ramp support 460 is provided with a groove on the backside and a lamp substrate 404 with a rear lamp 402 mounted thereon is inserted into the ramp support base 460, The lamp base 404 and the lamp supporter 460 are moved by energizing the pusher 324 to push the push button, so that the switch is energized to light the lamp.

On the other hand, the opposite side of the lamp support 460 is connected to the switch 420, and a substrate is provided on the front and rear of the switch. The substrate is configured with first and second substrates 440 and 442, each of which is connected to a switch by a connection terminal 446.

In another embodiment of the present invention, the LED lamps 402 on the rear side may be classified by color.

For example, when LED lamps are made up of red, blue, and yellow, and the colors are classified according to the rank of firefighters, when they are put into the field, they are aware of who is on the side or the front side.

Such an embodiment can provide a sense of security to firefighters put on the field and has an advantage in that it is easy to grasp the personnel.

The electrical connection 500,

On the other hand, the present invention has an electrical connection part 500.

The electrical connection part 500 of the present invention is used to supply power to both the front side LED lamp module 140 and the rear side lighting part 400 by using one battery 202 fitted in the casing 200 By using one battery, the volume and weight of the lantern can be reduced, the structure can be simplified, and solder and wire connection can be eliminated, thereby realizing a lantern with fewer failures.

In the present invention, the electrical connection part 500 has a (+) pole movement path and a (-) pole movement path.

First, the (+) pole movement path includes a battery terminal piece 510 and a first large diameter connection spring 540 to which the (+) pole of the battery 202 contacts, a connection pipe 520 and a connection cap 522, And a second large diameter connection spring 542.

The negative polarity path includes a small diameter connection spring 502 that contacts the negative pole of the battery 202, the first and second substrates 440 and 442, the second substrate 442, An end cap 300 in contact with the socket 560 and a casing 200 connected to the end cap 300 in a screw connection manner and a casing 200 connected to the end of the casing 200 And the large-diameter spring 160 connecting the (-) connecting portion 242 and the front-side LED module 140.

The battery terminal piece 510 is disposed inside the tip of the casing 200 and the positive terminal of the battery 202 is connected to the terminal terminal 510 (+) Power source is energized to the first large diameter connection spring 540 which is in close contact with the outer periphery of the terminal piece 510. [

The first large diameter connection spring 540 is attached to one side of a connection pipe 520 fitted in the casing 200 and the other side of the connection pipe 520 is connected to the connection cap 522 And are electrically connected closely.

A second large diameter connection spring 542 is inserted into the connection cap 522 and the second large diameter connection spring 542 is connected to a conductor 444 printed on the surface of the first substrate 440 So that they are electrically connected to each other.

It is a matter of course that the first substrate 420, the second substrate 442, and the lamp substrate 404 are electrically connected to each other.

(+) Pole power source of the battery 202 is connected to the terminal piece 510 - the first large diameter spring 540 - the connecting pipe 520 - the connecting cap 522 - the second large diameter spring 542, Side lighting unit 400 through the front-side lighting unit.

Meanwhile, the LED lamp module 140 has a small diameter spring 162 which is connected to the substrate and is closely contacted with the battery terminal piece 510 so that the (+) electrode is electrically connected.

(-) pole movement path starts from a small-diameter (-) pole connection spring 502 protruded in a state of being connected to the first substrate 440 of the front side lighting section 400.

(-) pole connection spring 502 is tightly connected to the negative pole of the battery 202 to supply negative pole power to the first substrate 420, and the switch 420 is connected to the When the push button is pressed, a connection or a short circuit is performed, and power is supplied to the second substrate 442 to supply power to the lamp substrate 404 electrically connected to the second substrate 442 so that the lamp 402 emits light.

Next, the process of transmitting the (-) pole power of the battery 202 to the LED lamp module 140 installed on the front side is as follows.

A conductor 444a is printed on the surface of the second substrate 442 in the same manner as the first substrate and the lamp support 460 is brought into contact with the conductor 444, The protruding pieces 360 of the first electrode 300 are electrically connected to each other.

A negative pole threaded portion connecting portion 340 formed on the front side of the end cap 300 and a negative pole threaded portion connecting portion 240 of the casing are screwed to each other, (-) electrode 242 and the LED lamp module 140 are connected to each other by the large-diameter spring 160 to supply a negative (-) pole.

The holder (600)

The holder 600 is for fixing the lantern 10 to one side of the fire helmet and includes a clamp 620 having a coupling portion 622 fitted to the helmet frame, An engaging member 640 having an engaging portion 642 engaged in a slide manner, an escape preventing ball 660 for preventing the assembled lantern from moving during movement, and a fixing member 680.

The clamp 620 is fixed to a side of the helmet with a coupling portion 622 fitted on the edge of the helmet and the coupling member 640 is fixed to the extension 624 integrally formed with the coupling portion 622 Assembled.

The coupling member 640 is fitted to the bottom surface of the through hole 626 formed at the center of the extending piece 624 and the upper side fitted to the through hole 626 is constituted of a rotation axis 647 constituting the rotation center, 647 are integrally formed on the lower side of the engaging members 220,

In other words, the engaging member 640 is inserted into the through hole of the extending piece 624 and the lower side fitting portion 642 is engaged with the coupling member 220 The rotating shaft 647 of the engaging member 640 rotates about the through hole 626 and the angle of the lantern can be adjusted by rotating the lantern 10 will be.

On the other hand, an installation hole 640a is provided on the inner side of the coupling member 640. The release preventing ball 660 is inserted into the installation hole 640a and the support spring 662 is inserted into the upper portion of the release preventing ball 660. The fixing member 680 is inserted thereon, In the configuration in which the balls are elastically supported, screw portions 648 and 682 are formed and screwed on the fixing member 680 and the upper side of the mounting hole, respectively.

The holder 600 having such a configuration is used for attaching the lantern 10 to the fire helmet. First, the engaging portion 622 is fitted to the rim of the fire helmet. If necessary, 622a to tighten completely.

Of course, the coupling member 640 is fitted to the extension piece 624 of the clamp 620 and is fixed by the fixing member 680, and the attachment hole 640a is formed with the release- (662).

In this state, when the firefighter assemble the lantern 10, the escape prevention ball 660 is pressed on the bottom surface 224 of the binding member 220 and is assembled in a state of being pulled by the installation hole. After assembly, 662 press the release preventing ball and the release preventing ball is pressed against the bottom surface, so that the lantern does not come out during operation or while moving.

The present invention having such a structure is mounted on a fire helmet with a holder 600,

The coupling portion 622 of the clamp 620 is coupled to the rim of the helmet and the lantern 10 is slidably coupled to the fitting portion 642 of the holder 600. [

That is, the coupling member 220 provided in the lantern 10 is inserted into the fitting portion 642 to be joined.

When the firefighter rotates the lantern 10 to secure a view of another angle, when the lantern is held and rotated, the engaging member 640 with the lantern is rotated about the upper side rotary shaft 647 and the angle of the lantern It can be adjusted.

In addition, the present invention can secure a view by lighting the LED lamp module 140 installed on the front side and the lighting part 400 provided on the rear side by using one battery 202, and prevent a safety accident, Always have a psychological sense of security for exposed firefighters.

For this purpose, the present invention has a (+) pole travel path and a (-) pole travel path, and each of them electrically discharges the electric energy of the battery built in the casing 200 to the front side LED lamp module 140 and the rear side lighting part 400 .

In the present invention, the casing (200) and the end cap (300) are made of a conductive metal, and the inner and outer surfaces of the casing Slip and light weight can be achieved.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. .

10: lantern 100: head
120: housing 140: LED lamp module
200: casing 202: battery
220: Bonding member 300: End cap
322: push button 400: front side lighting part
420: switch 500: electrical connection
600: holder 620: clamp
640: coupling member 642:

Claims (8)

As a lantern installed in a fire helmet,
A casing in which a battery is inserted, and a coupling member protrudes from an outer surface of the casing;
A head unit having a cylindrical housing assembled on the front side of the casing and equipped with an LED lamp module for irradiating light inside the housing;
An end cap coupled to the rear side of the casing and having a push button at a rear end thereof;
A rear lighting unit provided inside the end cap and having a switch connected to the push button, the LED lamp electrically connected to the switch illuminates light in a push button direction;
An electric connection part having a (+) pole travel path and a (-) pole travel path so that the electric energy of the battery is transmitted to each of the rear side lighting part and the LED module; And
And a holder having a fitting portion that is fitted in a sliding form to the coupling member of the casing, and a clamp is provided on an upper portion of the fitting portion and is detachably attached to a side edge of the helmet.
The method according to claim 1,
The clamp of the holder has a " C "-shaped engaging portion that is fitted to the rim of the helmet, and an extending piece integrally extending to the engaging portion is formed,
Further comprising a coupling member having a rotation shaft fitted in the through hole and having a fitting portion for coupling the coupling member of the casing in a sliding manner to a lower portion of the rotation shaft.
3. The method of claim 2,
And a fixing member is assembled to the screw portion formed on the upper side of the mounting hole so that the detachment preventing ball is inserted into the supporting spring Wherein the helmet is attached to the helmet.
The method according to claim 1,
(-) pole female connection portion is provided at the tip of the end cap so as to be screwed to the negative (-) pole connection portion provided at the rear end of the casing,
Wherein the negative (-) and negative (-) female thread connection portions are coupled and electrically connected with each other in a state in which the insulating layer is peeled off,
Further comprising a (-) pole connection portion on the inner surface of the front end of the casing where the insulation layer is peeled off to electrically connect the LED lamp module.
The method according to claim 1,
The rear lighting section includes a lamp support which is connected to a push button, a lamp substrate on which an LED lamp is mounted is inserted into the lamp support,
A switch connected to a front surface of the lamp supporter includes a first substrate electrically connected to a battery, a lamp substrate, and an electrically second substrate,
Wherein the first substrate and the second substrate are electrically connected to each other by connection terminals.
The method according to claim 1,
The electric connection portion includes a terminal piece to which the positive electrode of the battery is closely attached to the inner tip of the casing to be connected,
A first large diameter spring, a connection pipe and a connection cap are sequentially fitted in the casing to be electrically connected to the terminal piece,
And the connection cap is connected to the rear side lighting portion to transmit the positive (+) pole electric energy of the battery to the LED substrate,
(-) pole connection spring provided in the switch is connected to the negative pole of the battery of the battery to transmit negative electrical energy to the LED substrate. A helmet-laden fire-fighting lantern.
The method according to claim 1,
(-) pole connection spring connected to the first substrate is grounded to the negative (-) pole of the battery, and the small-
A second substrate provided on the other side of the switch is electrically connected to the first substrate and connected to the lamp supporter, an end cap connected to a rear surface of the lamp supporter, a casing coupled to the end cap, (-) pole connection portion provided at the distal end portion and the large-diameter spring provided at the (-) pole connection portion are electrically connected,
Wherein the large diameter spring is connected to the LED lamp module such that negative (-) pole electrical energy of the battery is delivered to the LED lamp module,
Wherein the LED lamp module further comprises a small aperture spring connected to the substrate for grounding the positive pole of the battery to allow positive electrical energy to be transmitted.
The method according to claim 1,
Wherein the casing, the end cap, and the housing of the head are made of a conductive metal, and the inner and outer surfaces thereof are partially peeled and electrically connected in a state in which the non-conductive coating film is covered.

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