KR101783827B1 - Protective device for small sized flying object - Google Patents

Abstract

A protective device for a miniature vehicle is disclosed.
In accordance with one aspect of the present invention, a protection device for a small-sized air vehicle includes a body, a plurality of rotatable blades, and a wing shaft to which the wings are fixed, A protective ring member which is formed in a ring shape surrounding the wing of the body and can be pivoted to the body so as to be folded or unfolded with respect to the body and is sized to be in contact with each other when the body is folded; And a protection ring engagement member interposed between the adjacent protection ring members and capable of connecting and fixing the adjacent protection ring members on both sides thereof, A second engaging member coupled to a portion of the second protective ring member disposed on one side of the first protective ring member; and a second engaging member engaged with the first engaging member and the second engaging member, Wherein the first engaging member includes a first lid member for covering the first protective ring member and a first supporting member for supporting the first lid member, The second engagement member includes a second cover member for covering the second protection ring member and a second support member for supporting the second cover member, and the first protection ring member and the second protection ring member In one member is located adjacent one another, there is a first coupling member and the second coupling member can be coupled to each other by the fixing member.
According to the disclosed protection device for a small-sized air vehicle, it is possible to make the coupling between the protection rings more robust by connecting and securing the separate types of protection rings for protecting the wings to a small-sized air vehicle, It can be safely and conveniently stored, and when a small air vehicle crashes, the wing can be cut and the accident caused by the wing can be prevented.

Description

{Protective device for small sized flying object}

The present invention relates to a protection device for a small-sized vehicle.

Small-sized airplanes are small-sized airplanes that can fly in the air without being piloted, and are being developed for various purposes such as pesticide spraying, portable reconnaissance, shooting, and logistics.

When such a small flying object falls, a plurality of wings coupled to a small flying object frequently pass over to a person or object, or become stuck.

In order to solve this problem, a protective device has been installed around the wing of a small-sized air vehicle, and an example of this protective device is the patent document given below.

However, according to the conventional protection device for a small-sized vehicle, it is disadvantageous in that it is manufactured as an integral type and its usable range according to its volume is reduced. In order to reduce the volume of the small-sized flying object and the protecting device, .

In addition, according to the protection device manufactured in the form of a ring which can be separated from each other, there is a risk that it may shake due to the resistance of the wind during flight, affect the small-sized air vehicle, .

In addition, when a small airplane is lost in center or falls due to an accident, a device capable of reducing such an accident has been developed because of the accident caused by the blade-shaped wing and the accident caused by not reducing the turning force of the wing do.

Open Patent No. 10-2012-0136797, Disclosure Date: 2012.20.20, Title of invention: Protective cover for unmanned aerial vehicle Open Patent: No. 10-2016-0008667, Publication date: 2016.01.25: Title of invention: Protective device for unmanned aerial vehicle

The present invention relates to a method for protecting a wing of a small-sized flying object by connecting and securing detachable protective rings to each other, thereby making it possible to more firmly connect the protective rings and to reduce the surface area during storage, The object of the present invention is to provide a protection device for a small-sized air vehicle which can prevent an accident caused by a wing due to the cutting of the wing when a small-sized air vehicle falls.

In accordance with one aspect of the present invention, a protection device for a small-sized air vehicle includes a body, a plurality of rotatable blades, and a wing shaft to which the wings are fixed, A protective ring member which is formed in a ring shape surrounding the wing of the body and can be pivoted to the body so as to be folded or unfolded with respect to the body and is sized to be in contact with each other when the body is folded; And a protection ring engagement member interposed between the adjacent protection ring members and capable of connecting and fixing the adjacent protection ring members on both sides thereof, A second engaging member coupled to a portion of the second protective ring member disposed on one side of the first protective ring member; and a second engaging member engaged with the first engaging member and the second engaging member, Wherein the first engaging member includes a first lid member for covering the first protective ring member and a first supporting member for supporting the first lid member, The second engagement member includes a second cover member for covering the second protection ring member and a second support member for supporting the second cover member, and the first protection ring member and the second protection ring member In one member is located adjacent one another, it characterized in that the first engagement member and the second coupling member, which may be bonded to each other by the fixing member.

According to one aspect of the present invention, there is provided a protection device for a small-sized air vehicle, comprising: a body; a plurality of rotatable wings; and a wing shaft to which the wings are fixed, A protective ring member which is formed in a ring shape surrounding each of the vanes and is rotatable with respect to the body so as to be folded or unfolded with respect to the body, And a protection ring engagement member interposed between the adjacent protection ring members and capable of connecting and fixing the adjacent protection ring members on both sides thereof, A second engaging member coupled to a portion of the second protective ring member disposed on one side of the first protective ring member; and a second engaging member engaged with the first engaging member and the second engaging member, Wherein the first engaging member includes a first lid member for covering the first protective ring member and a first supporting member for supporting the first lid member, The second engagement member includes a second cover member for covering the second protection ring member and a second support member for supporting the second cover member, and the first protection ring member and the second protection ring member The first engagement member and the second engagement member can be coupled with each other by the fixing member at a position where the members are adjacent to each other so that the separate forms of protection rings for protecting the wings on the small- It is possible to secure the connection between the protection rings more securely and to save the surface area in storage safely and conveniently by fixing, and it is possible to prevent the accident caused by the wing due to the cutting of the wing when the small- And an object of the present invention is to provide a protection device for a vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of a small-sized air vehicle according to a first embodiment of the present invention, in which a small air vehicle protection device is mounted. FIG.
FIG. 2 is a view showing a state in which the protection ring engagement member according to the first embodiment of the present invention is separated. FIG.
3 is an enlarged view of portion A shown in Fig. 1 according to the first embodiment of the present invention. Fig.
FIG. 4 is an oblique view from above, showing a folded state of the protective ring member according to the first embodiment of the present invention. FIG.
5 is an enlarged view of part B shown in Fig. 4 according to the first embodiment of the present invention. Fig.
FIG. 6 is a front view of a small-sized flying object according to the first embodiment of the present invention. FIG.
FIG. 7 is an enlarged view of part C shown in FIG. 6 according to the first embodiment of the present invention; FIG.
FIG. 8 is an enlarged view of a wing cutter according to a first embodiment of the present invention, in which a wing cutting member is detached from a wing axis and hits a wing to cut a wing.
9 is a view showing a state in which the protection ring engagement member according to the second embodiment of the present invention is separated.
10 is an enlarged view of an enlarged view of a state in which a protection ring engagement member according to a third embodiment of the present invention is coupled to a protection ring member.
11 is a cross-sectional view showing a state in which a first coupling member is inserted into a protective second coupling member according to a third embodiment of the present invention;
FIG. 12 is a sectional view showing a separated state of a protection ring engagement member according to a fourth embodiment of the present invention; FIG.
13 is a cross-sectional view showing a state in which the first lid member and the first seating member of the first engagement member according to the fourth embodiment of the present invention are combined.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a protection device for a small-sized air vehicle according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a top view of a small-sized air vehicle according to a first embodiment of the present invention, in which a protective device for a small-sized air vehicle is mounted. FIG. 2 is a cross- FIG. 3 is an enlarged view of a portion A shown in FIG. 1 according to a first embodiment of the present invention, FIG. 4 is a view showing a folded state of the protective ring member according to the first embodiment of the present invention FIG. 5 is an enlarged view of the portion B shown in FIG. 4 according to the first embodiment of the present invention, FIG. 6 is a front view of the small-sized flying object according to the first embodiment of the present invention FIG. 7 is an enlarged view of the portion C shown in FIG. 6 according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view of the blade unit according to the first embodiment of the present invention, In order to separate the wings from the blade The value is an enlarged view an enlarged view.

Referring to FIGS. 1 to 8 together, the protection apparatus 100 for a small air vehicle according to the present embodiment includes a protection ring member 110 and a protection ring engagement member 120.

The small flying object includes a body 10, a plurality of rotatable blades 20 and a wing axis 30 to which each of the blades 20 is fixed. The small flying object is capable of flying, Photography, logistics, and so on.

The protective ring member 110 is formed in a ring shape surrounding the wing 20 and is rotatably coupled to the body 10 so as to be folded or unfolded with respect to the body 10 of the small flying body, When the cover 10 is folded with respect to the body 10, the protection ring members 110 are formed to have a size capable of contacting with each other.

That is, the protection ring member 110 may be pivoted to fold or unfold into the body 10. [

In addition, for example, a battery or the like is installed in the body 10, and a case in which the pesticide is contained is further installed in case of pesticide application.

Since the number of the vanes 20 and the number of the protection ring members 110 are equal to each other because the protection ring member 110 is formed for each of the vanes 20, The protection ring member 110 may be formed in various numbers.

The protection ring engaging member 120 is interposed between adjacent ones of the protection ring members 110 surrounding the small flying body to connect and fix the protection ring members 110 on both sides.

Reference numeral 111 denotes a first protection ring member included in the protection ring member 110; 112 denotes a protection ring member included in the protection ring member 110 and disposed on one side of the first protection ring member 111; 2 is a protective ring member.

The protection ring engagement member 120 includes a first engagement member 121 coupled to the first protection ring member 111 of the protection ring member 110 and a second engagement member 121 coupled to the second protection ring member 110 of the protection ring member 110. [ A second engaging member 122 coupled to the first engaging member 112 and a fixing member 123 capable of connecting and fixing the first engaging member 121 and the second engaging member 122 to each other.

The first engaging member 121 includes a first lid member 140 for covering the first protective ring member 111 and a first supporting member 150 for supporting the first lid member 140 do.

The first lid member 140 includes a first lid seating portion 141 and a second lid seating portion 141 formed to pass through the first lid seating portion 141 to be securely seated in the first supporting member 150. [ A first cover seat member 143 which can be fixed through the first cover seat hole 142 and a first cover ring member 142 for fixing the first cover ring member 111 to a part of the first cover ring member 111, A first lid ring hole 145 through which the first lid ring member 144 passes and a plurality of first lid fixing holes 147 formed on the other side of the first lid seating part 141. [ And a first lid fixing member 146 that can be fixed to the first lid fixing hole 147 through the first lid fixing hole 147.

The first support member 150 is installed in a state where the first cover fixing member 146 and a part of the first protection ring member 111 are required to be inserted into the first support member 150, A first pedestal seating part 151 in contact with the seating part 141 and a first pedestal seating hole 152 through which the first lid seating member 143 can pass, A first support seating member 153 capable of fixing the first cover seating member 143 penetrating through the first cover ring member 152 and a first support ring hole 155 through which the first cover ring member 144 can pass, , A first support ring member (154) capable of fixing the first cover ring member (144) penetrating through the first support ring hole (155), and a second cover ring member A first base fixing hole 157 capable of fixing the first cover fixing member 146 penetrating through the first base fixing hole 157, A first fixing hole 159 through which the fixing member 123 can pass and a first locking protrusion 158 serving as a locking protrusion so as to prevent the first cover seating portion 141 from being pushed, .

The first lid seating part 141 is seated on the first pedestal seating part 151 and the first lid seating part 141 is blocked so that the first lid seating part 141 is not pushed, So that the lid seating part 141 can be more stably seated in the first pedestal seating part 151.

The first cover ring member 111 is inserted into the first engagement member 121 so that the first cover seat 141 is seated on the first support seat 151, The first cover seating member 143 sequentially passes through the first cover receiving hole 142 and the first receiving hole 152 and is fixed by the first receiving seating member 153, The lid fixing member 146 sequentially passes through the first lid fixing hole 147 and the first support fixing hole 157 to fix the first lid fixing member 156 with the first lid fixing member 156, When the first cover ring hole 144 and the first cover ring hole 145 are sequentially passed through the first cover ring hole 145 and the first support ring member 154, It is possible to firmly engage with the first protection ring member 111 so as not to be loosened.

The second engaging member 122 includes a second lid member 160 for covering the second protective ring member 112 and a second supporting member 170 for supporting the second lid member 160 do.

The second lid member 160 includes a second lid seating portion 161 and a plurality of second lid seating holes 161 penetrating the second lid seating portion 161 to be securely seated in the second supporting member 170. [ A second cover seat member 163 which can be fixed through the second cover seat receiving hole 162 and a second cover ring member 163 for fixing a part of the second protection ring member 112, A second cover ring hole 165 through which the second cover ring member 164 penetrates and a plurality of second cover fixing holes 167 formed on the other side of the second cover mount portion 161 And a second lid fixing member 166 which can be fixed to the second lid fixing hole 167 through the second lid fixing hole 167.

The second supporting member 170 is in a state in which a part of the second protecting ring member 112 is required to be inserted into the second lid fixing member 166 and the second supporting member 170, A second support seating hole 172 through which the second cover seating member 163 can pass and a second support seating hole 172 through which the second cover seating member 163 can pass, A second support seating member 173 capable of fixing the second cover seating member 163 penetrating through the first cover ring member 172 and a second support ring hole 175 , A second support ring member (174) capable of fixing the second cover ring member (164) penetrating through the second support ring hole (175), and a second cover ring member And a second support fixture member 166 that can fix the second cover fixation member 166 penetrating through the second support fixation hole 177. [ A second fixing hole 179 through which the fixing member 123 can penetrate and a second locking protrusion 178 serving as a locking protrusion so that the second cover seating portion 161 is not pushed, .

The second lid seating part 161 is seated on the second seating seating part 171 and the second lid seating part 161 is blocked so that the second lid seating part 161 is not pushed, So that the lid seating portion 161 can be more stably seated in the second pedestal seating portion 171.

The second protective ring member 112 is inserted into the second engaging member 122 so that the second lid seating portion 161 is seated on the second pedestal seating portion 171, The second cover seating member 163 sequentially passes through the second cover receiving hole 162 and the second receiving hole 172 and is fixed by the second receiving seating member 173, The lid fixing member 166 sequentially passes through the second lid fixing hole 167 and the second lid fixing hole 177 to fix the second lid fixing member 176 with the second lid fixing member 176, When the first cover ring 164 sequentially passes through the second cover ring hole 165 and the second support ring hole 175 and is fixed by the second support ring member 174, It is possible to firmly engage with the second protection ring member 112 so as not to be loosened.

Here, for example, the first cover seating member 143, the first cover ring member 144, the first cover fixing member 146, the second cover seating member 163, The member 164 and the second lid fixing member 166 may be formed of a threaded bolt and the first and second support ring members 154 and 154 The member 156, the second support seating member 173, the second support ring member 174, and the second support fixing member 176 may be formed of a nut capable of fixing the bolt.

The first engaging member 121 is engaged with the first protective ring member 111 and the second engaging member 122 is engaged with the second protective ring member 112, The fixing member 123 is positioned at a position where the first engaging member 121 and the second engaging member 122 are adjacent to each other so that the first fixing hole 159 of the first engaging member 121, The first protection ring member 111 and the second protection ring member 112 are extended in a wide direction toward the ground when the second fixing holes 179 of the coupling member 122 are sequentially passed through the first protection ring member 111. [ The ring member 111 and the second protection ring member 112 can be connected and fixed.

4, the first protection ring member 111 and the second protection ring member 112, which are adjacent to each other, are connected to and joined to each other by the protection ring engagement member 120 , The protection ring member 110 can be retracted toward the body 10 of the small flying object.

When the protective ring member 110 is formed as described above, the protective ring member 110 is positioned on the small flying object 110 in a state in which the protective ring member 110 of the small flying object coupled with the small- To the body (10).

As described above, when the protection ring member 110 is contracted toward the body 10, the surface area of the protection ring member 110 is reduced relative to the unfolded state, The possible range is reduced and safe and convenient storage is possible.

Reference numeral 30 denotes a wing shaft formed at the upper end of the vane 20. The wing shaft 30 is made of a material having a relatively low strength so that the wing shaft 30 is bent when the small flying object is crashed. A blade cutting member 130 is formed at a distal end of the blade shaft 30 to cut the blade 20.

The wing shaft 30 is bent so that the wing cutting member 130 formed at the end of the wing shaft 30 is separated from the wing shaft 30, (20) so as to cut the blade (20).

As described above, when the vane 20 is removed from the small flying object, it is possible to prevent an accident caused by the sharp vane 20.

Herein, the wing 20 is formed as a sharp blade, and it means an accident such as a human injury due to the wing 20 or a damage to a plant.

That is, a part of the blade 20 can be removed by unexpectedly cutting the blade 20 with the blade cutting member 130 when the small flying object falls and the blade shaft 30 is bent.

Hereinafter, a protection device for a small air vehicle according to another embodiment of the present invention will be described with reference to the drawings. In carrying out these explanations, the description overlapping with the content already described in the first embodiment of the present invention described above will be omitted and omitted here.

FIG. 9 is a view showing a separated state of the protection ring engagement member according to the second embodiment of the present invention.

9, in this embodiment, the protection ring engagement member 220 includes a first engagement member 221, a second engagement member 222, and a fixing member 223.

The fixing member 223 sequentially passes through the first fixing hole 259 formed in the first engaging member 221 and the second fixing hole 279 formed in the second engaging member 222, 1 coupling member 221 and the second coupling member 222 are connected and fixed to each other.

The first fixing hole 259 of the first engaging member 221 and the second fixing hole 259 of the second engaging member 222 are formed at the distal end of the fixing member 223, And the threaded hole 225 can be engaged with the fixing hole 279.

The screw thread 225 of the fixing member 223 is fixed to the inner wall surface of the first fixing hole 259 and the second fixing hole 279 by rotation so that the fixing member 223 The first fixing hole 259 and the second fixing hole 279 can be coupled with each other, so that the coupling is simple.

FIG. 10 is an enlarged view of a state in which the protection ring engagement member according to the third embodiment of the present invention is coupled to the protection ring member, and FIG. 11 is an enlarged view of the protective second engagement member according to the third embodiment of the present invention. 1 is a cross-sectional view showing a state in which a coupling member is inserted.

10 to 11, in this embodiment, the protection ring engagement member 320 includes a first engagement member 321 and a second engagement member 322. [

A part of the protection ring member is inserted from one side of the first engagement member 321, and a predetermined length is formed, and a locking protrusion 325 is formed.

A part of the second protection ring member 312 disposed on one side of the first protection ring member 311 is inserted into the second engagement member 322 and the first engagement member 321 is inserted, The protrusion 325 can be caught and fixed.

An engaging protrusion 327 is formed on the inner side of the first engaging member 321 so that the engaging protrusion 325 can be caught and fixed.

Here, for example, the protective ring engagement member 320 can be made in the form of a strap that can be adjusted in length and fixed at a desired length.

In a state where the first engaging member 321 and the second engaging member 322 are engaged with the first protective ring member 311 and the second protective ring member 312, The first engaging member 321 passes through the through hole of the second engaging member 322 and the engaging protrusion 325 is caught and fixed to the engaging protrusion 327. As a result, The member 311 and the second protection ring member 312 can be connected and fixed.

FIG. 12 is a cross-sectional view showing a state in which a protection ring engagement member according to a fourth embodiment of the present invention is separated, FIG. 13 is a perspective view of a first cover member and a first seat of a first engagement member according to a fourth embodiment of the present invention, Sectional view showing a state in which members are combined.

Referring to FIGS. 12 to 13 together, in this embodiment, the protection ring engagement member 420 includes a first engagement member 421, a second engagement member 422, and a fixing member.

The first engaging member 421 includes a first lid member 440 and a first supporting member 450 for supporting the first lid member 440.

The first lid member 440 is provided with a first lid seating portion 441 and a second lid seating portion 450 so that the first lid seating portion 441 is securely seated on the first supporting member 450, And a first fixing protrusion 447 is formed to be able to fix the first lid member 440 to the first supporting member 450.

A first fixing groove 453 through which the first fixing protrusion 447 can be inserted is formed inside the first base fixing portion 451 of the first supporting member 450 to correspond to the first fixing protrusion 447, As shown in FIG.

When the first cover receiving portion 441 and the first base receiving portion 451 are coupled with each other, the first fixing protrusions 447 are separated from the first fixing recesses 453 So that the coupling is simplified.

The first fixing part 452 formed at the upper end of the first fixing groove 453 prevents the first fixing protrusion 447 inserted in the first fixing groove 453 from being discharged at random, The state where the first latching protrusion 447 is coupled to the first fixing groove 453 can be more securely maintained.

The second engaging member 422 includes a second lid member 460 and a second supporting member 470 for supporting the second lid member 460.

The second lid member 460 is provided with a second lid seating portion 461 for securely seating on the second supporting member 470 and a second lid seating portion 461 on the second lid seating portion 461 side, A second fixing protrusion 467 is formed to be able to fix the second lid member 460 to the second supporting member 470.

A second fixing groove 473 into which the second fixing protrusion 467 can be inserted is formed inside the second base fixing portion 471 of the second supporting member 470 in the second fixing protrusion 467, As shown in FIG.

When the second lid seating part 461 and the second pedestal seating part 471 are coupled with each other, the second fixing protrusions 467 are separated from the second fixing grooves 473 So that the coupling is simplified.

The second fixing portion 472 formed at the upper end of the second fixing groove 473 prevents the second fixing protrusion 467 inserted in the second fixing groove 473 from being discharged. , The state in which the second locking protrusion 467 is coupled to the second fixing groove 473 can be more securely maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the following claims And can be changed. However, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

According to an aspect of the present invention, a protection device for a small-sized air vehicle includes a plurality of protection rings for protecting wings of a small-sized air vehicle, It can be stored safely and conveniently by reducing the surface area during storage, and it can be used industrially because it can prevent accidents caused by wings when the wing is cut when a small flying body collapses.

100: Protective device for small craft
110: Protective ring member
120: protection ring engagement member
130: blade cutting member

Claims (7)

A small flying object comprising a body, a plurality of rotatable blades and a wing axis to which each of the blades is fixed, and which can fly using the wing,
A protective ring member formed in a ring shape surrounding each of the vanes, the protective ring member being rotatable with respect to the body so as to be folded or unfolded with respect to the body, And
And a protective ring engaging member interposed between the adjacent protecting ring members and capable of connecting and fixing the adjacent protecting ring members,
The protection ring engagement member
A first engaging member coupled to a portion of the first protective ring member,
A second engaging member coupled to a portion of the second protective ring member disposed on one side of the first protective ring member, and a fixing member capable of connecting and fixing the first engaging member and the second engaging member to each other and,
Wherein the first engagement member includes a first lid member for covering the first protection ring member and a first support member for supporting the first lid member,
The second engaging member includes a second lid member for covering the second protective ring member and a second supporting member for supporting the second lid member,
Characterized in that the first engagement member and the second engagement member can be coupled to each other by the fixing member at a position where the first protection ring member and the second protection ring member are adjacent to each other, . delete The method according to claim 1,
In a state where the first protection ring member and the second protection ring member in mutually neighboring states are connected and fixed to each other by the protection ring engagement member, the fixing member connects the first engagement member and the second engagement member to each other The protection ring member can be retracted toward the body of the small flying object. A small flying object comprising a body, a plurality of rotatable blades and a wing axis to which each of the blades is fixed, and which can fly using the wing,
A protective ring member formed in a ring shape surrounding each of the vanes, the protective ring member being rotatable with respect to the body so as to be folded or unfolded with respect to the body, And
And a protective ring engaging member interposed between the adjacent protecting ring members and capable of connecting and fixing the adjacent protecting ring members,
When the small-sized flying object falls,
Wherein a wing shaft made of a material having a relatively low strength is bent so that a wing cutting member coupled to a distal end of the wing shaft bumps against the wing to cut the wing. The method according to claim 1,
A screw thread is formed at a distal end of the fixing member,
And the threaded hole can be coupled to the first fixing hole formed in the first coupling member. A small flying object comprising a body, a plurality of rotatable blades and a wing axis to which each of the blades is fixed, and which can fly using the wing,
A protective ring member formed in a ring shape surrounding each of the vanes, the protective ring member being rotatable with respect to the body so as to be folded or unfolded with respect to the body, And
And a protective ring engaging member interposed between the adjacent protecting ring members and capable of connecting and fixing the adjacent protecting ring members,
The protection ring engagement member
A first engaging member having a predetermined length and formed with a locking protrusion,
And a second engaging member into which a part of a second protective ring member disposed on one side of the first protective ring member is inserted and the first engaging member is penetrated so that the engaging projection can be engaged and fixed,
And the first protection ring member and the second protection ring member can be connected and fixed to each other. The method according to claim 1,
Wherein the first lid member is formed with a first fixing protrusion inserted into the first supporting member and capable of fixing the first lid member to the first supporting member,
A first fixing groove into which the first fixing protrusion can be inserted is formed in a size required to insert the first fixing protrusion into the first supporting member,
The second lid member is formed with a second fixing protrusion inserted into the second supporting member and capable of fixing the second lid member to the second supporting member,
And a second fixing groove into which the second fixing protrusion can be inserted is formed in the second supporting member so that the second fixing protrusion can be inserted.

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