TW201811654A - Working platform for elevator shaft capable of being folded to empty sufficient space for template assembly during construction - Google Patents

Abstract

The present invention provides a working platform for elevator shaft, which comprises a first pedal portion, a second pedal portion, a third pedal portion, two first folding portions, two second folding portions, and two third folding portions. The two first folding portions are pivoted to two opposite sides of the first pedal portion and can be folded over onto the first pedal portion. The two second folding portions are pivoted to two opposite sides of the second pedal portion and can be folded over onto the second pedal portion. The two third folding portions are pivoted to two opposite sides of the third pedal portion and can be folded over onto the third pedal portion. The first pedal portion can be folded to be perpendicular to the second pedal portion. The third pedal portion can be placed next to the second pedal portion. The working platform for elevator shaft of the present invention can be fully laid on the elevator shaft before template assembly, so as to maintain the operation safety of construction personnel. During template assembly, the working platform for elevator shaft may be folded to empty the space for template assembly around the working platform.

Description

Elevator shaft working platform

The invention relates to a working platform, and more particularly to an elevator shaft working platform.

The traditional elevator shaft construction method is to install a safety net under the elevator shaft, and use steel bars or steel pipes as the supporting material, and use the formwork or solid wooden boards as a working platform on the supporting material. Then, an inner wall mold and an outer wall mold are assembled at the edge of the elevator shaft, and a steel bar is arranged between the inner wall mold and the outer wall mold, and then grouting is performed to form an elevator vertical shaft.

When assembling the inner wall mold and the outer wall mold, leave about 20 cm of mold assembly and mold removal space around the workbench. However, the full planks cannot provide the space for forming and removing molds, or the space for forming and removing molds must be reserved. In this case, there are problems such as non-compliance with regulations and excessively large opening spaces, which are dangerous.

In view of this, it is necessary to propose a solution to solve the above problems.

The object of the present invention is to provide an elevator shaft working platform, which can be folded up to leave enough space for forming modules, so as to facilitate the construction of an elevator vertical shaft.

To achieve the above object, the elevator shaft working platform of the present invention includes a first pedal portion, a second pedal portion, a third pedal portion, two first folding portions, two second folding portions, and two third folding portions. The first pedal portion has a first side, a second side, a third side, and a fourth side, wherein the first side is opposite to the third side and connected to the second side and the fourth side. The second pedal portion has a fifth side, a sixth side, a seventh side, and an eighth side. The fifth side is opposite to the seventh side and connected to the sixth and eighth sides. The fifth side is pivotally connected to the third side. The first pedal portion can be folded up and perpendicular to the second pedal portion. Each first folded portion has a ninth side, a tenth side, a eleventh side, and a twelfth side, wherein the ninth side is opposite to the eleventh side and connected to the tenth and twelfth sides. . The tenth sides of the two first folded portions are respectively pivoted to the second and fourth sides of the first pedal portion, and the two first folded portions can be folded onto the first pedal portion. Each second folded portion has a thirteenth side, a fourteenth side, a fifteenth side, and a sixteenth side, of which the thirteenth side is opposite the fifteenth side and the fourteenth side and the thirteenth side. Sixteen sides are connected. The fourteenth sides of the two second folded portions are pivotally connected to the sixth and eighth sides of the second pedal portion, respectively, and the two second folded portions can be folded onto the second pedal portion. The third pedal portion has a seventeenth side, an eighteenth side, a nineteenth side, and a twentieth side, of which the seventeenth side is opposite the nineteenth side, and the eighteenth side and the second The sides are connected. The seventeenth side of the third pedal portion can be placed against the seventh side of the second pedal portion. Each third folded portion has a twenty-first side, a twenty-second side, a twenty-third side, and a twenty-fourth side, wherein the twenty-first side is opposite to the twenty-third side, and The twenty-second and twenty-fourth sides are connected. Twenty-second sides of the two third folding portions are pivotally connected to the eighteenth and twentieth sides of the third pedal portion, respectively, and the two third folding portions can be folded onto the third pedal portion.

According to the working platform of the elevator shaft of the present invention, the opening of the elevator shaft can be fully covered before the formwork is assembled, and it is not necessary to reserve space for forming and removing the mold as in the traditional construction method, and a safe elevator shaft operating environment without openings can be achieved for maintenance. Safety of construction workers. When it is necessary to form the mold, the fold can be folded up again to leave enough space for the mold to facilitate the grouting of the mold to form the vertical shaft of the elevator. After the forming of the mold is completed, the folded portion can be lowered again to shield the remaining space after the template is assembled, and once again achieve a safe elevator shaft operation environment with no fall openings. In the future, when the mold is to be disassembled, fold up the folding part again to make room for demoulding. After the template is removed, lower the folding part again, that is, return to the original state of the elevator shaft.

In order to make the above and other objects, features, and advantages of the present invention more obvious, the following describes the embodiments of the present invention in detail with the accompanying drawings, as follows.

1 and 2, the elevator shaft working platform according to the first embodiment of the present invention includes a first pedal portion 110, a second pedal portion 120, a third pedal portion 130, two first folding portions 210, and two first The two folding portions 220, two third folding portions 230, and two shielding portions 240.

The first pedal portion 110 is rectangular and is made of a metal such as steel or aluminum. The first pedal portion 110 has two long sides and two short sides, wherein the long side extends toward a first direction, and the short side extends toward a second direction, wherein the second direction is perpendicular to the first direction.

The second pedal portion 120 is rectangular and is made of metal such as steel or aluminum. The shape and size of the second pedal portion 120 and the first pedal portion 110 are the same, and the long sides thereof extend in the first direction, and the short sides thereof extend in the second direction. A long side of the second pedal portion 120 is pivotally connected to a long side of the first pedal portion 110, and two short sides of the second pedal portion 120 are tangent to two short sides of the first pedal portion 110, respectively. After the first pedal portion 110 and the second pedal portion 120 are flattened, the first pedal portion 110 and the second pedal portion 120 are coplanar.

The third pedal portion 130 is rectangular and is made of metal such as steel or aluminum. The third pedal portion 130 and the first pedal portion 110 have the same shape and size, and also have two long sides and two short sides.

The first folded portion 210 is rectangular and is made of metal such as steel or aluminum. The first folded portion 210 has two long sides and two short sides, wherein the long sides extend toward the first direction and the short sides extend toward the second direction. The length and width of the first folded portion 210 are smaller than the length and width of the first pedal portion 110, respectively, and the first folded portion 210 is designed to be expandable and contractible to adjust the length so that the platform can also be used in a wider elevator shaft. One short side of each first folded portion 210 is pivotally connected to two short sides of the first pedal portion 110, and one long side of each first folded portion 210 is aligned to the same long side of the first pedal portion 110. The aligned long sides are not pivoted to the second pedal portion 120. The distance between the extension line of the other long side of each first folded portion 210 and the other long side of the first pedal portion 110 is defined as D1, where D1 is greater than the thickness of the second folded portion 220.

The second folded portion 220 is rectangular and is made of metal such as steel or aluminum. The second folded portion 220 and the first folded portion 210 have the same shape, with long sides extending toward the first direction and short sides extending toward the second direction. The length and width of the second folding portion 220 are smaller than the length and width of the second pedal portion 120, respectively, and the second folding portion 220 is designed to be retractable to adjust the length so that the platform can also be used in a wider elevator shaft. One short side of each second folded portion 220 is pivotally connected to two short sides of the second pedal portion 120, and one long side of each second folded portion 220 is aligned to the same long side of the second pedal portion 120. The aligned long sides are not pivoted to the first pedal portion 110. The distance between the extension line of the other long side of each second folded portion 220 and the other long side of the second pedal portion 120 is defined as D2, where D2 is greater than the thickness of the first folded portion 210.

The third folded portion 230 is rectangular and is made of metal such as steel or aluminum. The third folded portion 230 has two long sides and two short sides, wherein the long side extends toward the first direction and the short side extends toward the second direction. The length of the third folded portion 230 is smaller than the length of the third stepped portion 130, and the width of the third folded portion 230 is equal to the width of the third stepped portion 130. In addition, the third folding section 230 is designed to be retractable to adjust the length, so that the platform can also be used in a wider elevator shaft. One short side of each third folded portion 230 is pivotally connected to two short sides of the third pedal portion 130, and two long sides of each third folded portion 230 are respectively aligned to two long sides of the third pedal portion 130.

The shielding portion 240 is rectangular and is formed of a metal mesh. The shielding portion 240 has two long sides and two short sides, wherein the long side extends toward the first direction and the short side extends toward the second direction. A long side of the shielding portion 240 is pivotally connected to a long side of the second folded portion 220, wherein the long side is a long side adjacent to the first folded portion 210. The width of the shielding portion 240 is greater than the distance between the second folded portion 220 and the first folded portion 210, that is, greater than D1 + D2. Therefore, the shielding portion 240 can be folded onto the first folded portion 210 to cover the first fold. A gap between the portion 210 and the second folded portion 220.

Referring to FIG. 3, according to the elevator shaft working platform according to the first embodiment of the present invention, the first folding portions 210 on both sides of the first pedal portion 110 can be folded 180 degrees onto the surface of the first pedal portion 110, and the second pedal portion The second folding portions 220 on both sides of 120 can be folded 180 degrees to the surface of the second pedal portion 120, and the third folding portions 230 on both sides of the third pedal portion 130 can be folded to 180 degrees to the surface of the third pedal portion 130 on. The third pedal portion 130 is capable of abutting against the second pedal portion 120. In addition, the first pedal portion 110 can be folded up to be perpendicular to the second pedal portion 120. Since D1 is larger than the thickness of the second folded portion 220 and D2 is larger than the thickness of the first folded portion 210, when the first folded portion 210 is folded to the first pedal portion 110 and the second folded portion 220 is folded to the second pedal portion 120 In the upward direction, the first pedal portion 110 can still be folded perpendicular to the second pedal portion 120 without interfering with each other. In addition, when the first pedal portion 110 is vertically folded, the first folded portion 210 and the second folded portion 220 can still move freely without interfering with each other.

According to the elevator shaft working platform according to the first embodiment of the present invention, the length of the first step portion 110, the second step portion 120, and the third step portion 130 can be designed as 155 cm, and the width can be designed as 20 cm. The retractable first folding portion 210, the second folding portion 220, and the third folding portion 230 have a length of 35 cm when fully extended, and a length of 20 cm when fully retracted. The width of the first folded portion 210 and the second folded portion 220 is designed to be 15 cm, and the width of the third folded portion 230 is designed to be 20 cm. The shielding portion 240 may be designed to have a length of 20 cm and a width of more than 10 cm. I should understand that the length and width of each pedal section and folding section can be designed according to actual needs.

Please refer to FIG. 4, which shows that the elevator shaft working platform according to the first embodiment of the present invention is laid on the elevator shaft. The elevator shaft 190 has a rectangular opening, and a plurality of steel bars or steel pipes are supported thereon as a supporting material 180. An elevator shaft working platform according to the first embodiment of the present invention is laid on the supporting material 180, and includes two first pedal portions 110, two second pedal portions 120, and a plurality of third pedal portions 130. The first pedal portion 110, the second pedal portion 120 and the third pedal portion 130 are also pivotally connected to the first folding portion 210, the second folding portion 220 and the third folding portion 230 on both sides, and the shielding portion 240 is also pivotally connected. Onto the second folded portion 220. The third pedal portion 130 is arranged side by side and sandwiched between two second pedal portions 120. The first folding portion 210, the second folding portion 220, and the third folding portion 230 are spread out flat, and the shielding portion 240 is folded over. Onto the first folded portion 210.

After the elevator shaft working platform of the first embodiment of the present invention is laid on the elevator shaft, the shielding portion 240 is folded back to the second folded portion 220, and the first folded portion 210, the second folded portion 220, and the third folded portion 230 are respectively Folded onto the first pedal portion 110, the second pedal portion 120, and the third pedal portion 130. After that, the first pedal portion 110 is folded 90 degrees perpendicular to the second pedal portion 120 to form a structure as shown in FIGS. 5 and 6. As can be seen in the figure, there is space available around the working platform for assembly and removal of formwork.

7 and 8, the elevator shaft working platform according to the second embodiment of the present invention includes a first pedal portion 110, a second pedal portion 120, and a first pedal portion provided in the elevator shaft working platform of the first embodiment. Three pedal portions 130, two first folding portions 210, two second folding portions 220, and two third folding portions 230. Different from the elevator shaft working platform of the first embodiment, the two long sides of the first folding portion 210 of this embodiment are respectively aligned to the two long sides of the first pedal portion 110, and the second folding portion 220 is The two long sides of are respectively aligned to the two long sides of the second pedal portion 120. In addition, the pivot system between the first pedal portion 110 and the second pedal portion 120 in this embodiment is raised.

In detail, referring to FIG. 9, the first pedal portion 110 and the second pedal portion 120 are respectively provided with a plurality of first protrusions 160 and a plurality of second protrusions 260, and each of the first protrusions 160 faces one Second protrusion 260. In addition, two opposite first protrusions 160 are pivotally connected to the top ends of the second protrusions 260. The distance between the pivot 170 and the first pedal portion 110 is H1, and the distance between the pivot 170 and the second pedal portion 120 is H2.

Please refer to FIGS. 10 and 11, according to the elevator shaft working platform according to the second embodiment of the present invention, the first folding portion 210 can also be folded 180 degrees onto the surface of the first pedal portion 110, and the second folding portion 220 It can also be folded 180 degrees onto the surface of the second pedal portion 120. It should be noted that the pivoting portion between the first folding portion 210 and the first pedal portion 110 has a certain thickness. When the first folding portion 210 is folded onto the first pedal portion 110, the pivoting portion will be at A gap is created between the two. Therefore, when the first folding portion 210 is folded onto the first pedal portion 110, the distance (defined as h1) from the top of the first folding portion 210 to the first pedal portion 110 is slightly larger than the thickness of the first folding portion 210 itself. Similarly, when the second folding portion 220 is folded onto the second pedal portion 120, there is also a gap due to the thickness of the pivot joint portion. Therefore, the distance (defined as h2) from the top of the second folded portion 220 to the second pedal portion 120 after being folded is also slightly larger than the thickness of the second folded portion 220 itself.

The elevator shaft working platform according to the second embodiment of the present invention, wherein H1 + H2 is greater than h1 + h2, so the gap formed after the first pedal portion 110 is folded over the second pedal portion 120 is sufficient to accommodate the overlap The first folded portion 210 and the second folded portion 220.

In order to prevent the middle portion of the first pedal portion 110 from collapsing because it is not supported, the first pedal portion 110 and the second pedal portion 120 are respectively provided with a plurality of pieces. The first pad 150 and a plurality of second pads 250 are capable of contacting the second pads 250 after the first pedal portion 110 is folded to support the first pedal portion 110, respectively. Middle section. I should understand that the first pad 150 can be increased and set to directly contact the second pedal portion 120, and the second pad 250 can also be increased and set to directly contact the first pedal portion 110, which also has support Effects of the first pedal portion 110. In addition, the number and positions of the first pads 150 and the second pads 250 may be determined according to actual conditions.

Please refer to FIG. 12, which shows that an elevator shaft working platform according to a second embodiment of the present invention is laid on the elevator shaft. As shown in the figure, the elevator shaft working platform of the second embodiment of the present invention is laid on the supporting material 180, which includes two first pedal portions 110, two second pedal portions 120, and a plurality of third pedal portions 130. The first pedal portion 110, the second pedal portion 120, and the third pedal portion 130 are also pivotally connected to the first folding portion 210, the second folding portion 220, and the third folding portion 230 on both sides, respectively. The third pedal portion 130 is arranged side by side and sandwiched between the two second pedal portions 120, and the first folded portion 210, the second folded portion 220, and the third folded portion 230 are spread out flat.

After the elevator shaft working platform of the second embodiment of the present invention is laid in the elevator shaft, the first fold portion 210, the second fold portion 220, and the third fold portion 230 can be folded to the first pedal portion 110 and the second pedal portion, respectively. 120 and the third pedal portion 130. Thereafter, the first pedal portion 110 is folded over onto the second pedal portion 120 to form a structure as shown in FIG. 13. As can be seen in the figure, there is space available around the working platform for assembly and removal of formwork.

Please refer to FIG. 14, the present invention further provides a fixing member 300 which can be used for fixing the elevator shaft working platform of the present invention. The fixing member 300 includes a first fixing plate 310, a second fixing plate 320, a screw 330, and a nut 340. One end of the screw 330 is welded to the center of the first fixing plate 310, which can pass through the opening 322 at the center of the second fixing plate 320, and the nut 340 can be locked on the screw 330. When the fixing member 300 is in use, the screw 330 on the first fixing plate 310 passes through the hole in the pedal portion from top to bottom, and passes through the opening 322 in the second fixing plate 320. After that, the nut 340 is screwed onto the screw 330 to clamp the supporting material 180 between the pedal portion and the second fixing plate 320. FIG. 15 shows that the third pedal portion 130 is fixed to the support member 180 using the fixing member 300.

According to the working platform of the elevator shaft of the present invention, the opening of the elevator shaft can be fully covered before the formwork is assembled, and it is not necessary to reserve space for forming and removing the mold as in the traditional construction method, and a safe elevator shaft operating environment without openings can be achieved for maintenance. Safety of construction workers. When it is necessary to form the mold, the fold can be folded up again to leave enough space for the mold to facilitate the grouting of the mold to form the vertical shaft of the elevator. After the forming of the mold is completed, the folded portion can be lowered again to shield the remaining space after the template is assembled, and once again achieve a safe elevator shaft operation environment with no fall openings. In the future, when the mold is to be disassembled, fold up the folding part again to make room for demoulding. After the template is removed, lower the folding part again, that is, return to the original state of the elevator shaft.

Although the present invention has been disclosed in the foregoing embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field to which the present invention pertains may make various changes and modifications without departing from the spirit and scope of the present invention. . Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

110‧‧‧First pedal section

120‧‧‧Second pedal section

130‧‧‧Third pedal section

150‧‧‧First pad

160‧‧‧ the first protrusion

170‧‧‧ Pivot

180‧‧‧ support

190‧‧‧Elevator shaft

210‧‧‧First fold

220‧‧‧Second Folding Section

230‧‧‧ Third Folding Section

240‧‧‧ shelter

250‧‧‧Second Block

260‧‧‧ second protrusion

300‧‧‧Fixed parts

310‧‧‧The first fixed plate

320‧‧‧Second fixed plate

330‧‧‧Screw

340‧‧‧nut

D1‧‧‧distance

D2‧‧‧distance

H1‧‧‧Distance

H2‧‧‧distance

FIG. 1 is a plan view of an elevator shaft working platform according to a first embodiment of the present invention. FIG. 2 is a plan view of an elevator shaft working platform according to the first embodiment of the present invention, wherein the first fold portion, the second fold portion, and the third fold portion are fully extended. FIG. 3 is a perspective view of an elevator shaft working platform according to the first embodiment of the present invention, wherein the first pedal portion, the first folding portion, the second folding portion, the third folding portion and the shielding portion are folded or folded. FIG. 4 is a plan view of the elevator shaft working platform covered with the elevator shaft according to the first embodiment of the present invention. FIG. 5 is a plan view of an elevator shaft working platform erected on the elevator shaft according to the first embodiment of the present invention, wherein the first pedal portion, the first folding portion, the second folding portion, the third folding portion and the shielding portion are folded or turned over. fold. FIG. 6 is a perspective view of an elevator shaft working platform erected on the elevator shaft according to the first embodiment of the present invention, wherein the first pedal portion, the first folding portion, the second folding portion, the third folding portion and the shielding portion are folded or turned over. fold. 7 is a plan view of an elevator shaft working platform according to a second embodiment of the present invention. 8 is a plan view of an elevator shaft working platform according to a second embodiment of the present invention, wherein the first fold portion, the second fold portion, and the third fold portion are fully extended. Fig. 9 is a sectional view taken along line A-A in Fig. 8. 10 is a perspective view of an elevator shaft working platform according to a second embodiment of the present invention, in which the first folding portion, the second folding portion, and the third folding portion are folded, and the first pedal portion is further folded to the second pedal portion. on. Fig. 11 is a sectional view taken along line B-B in Fig. 10. FIG. 12 is a plan view of an elevator shaft working platform fully covered on the elevator shaft according to a second embodiment of the present invention. FIG. 13 is a plan view of an elevator shaft working platform erected on the elevator shaft according to a second embodiment of the present invention, wherein the first pedal portion, the first folding portion, the second folding portion and the third folding portion are folded. FIG. 14 is an exploded perspective view of a fixing member for fixing an elevator shaft working platform of the present invention. FIG. 15 is a view showing the fixing member in FIG. 14 used for fixing the third pedal portion of the elevator shaft working platform of the present invention.

Claims (10)

An elevator shaft working platform is used to erect an elevator shaft. The elevator shaft working platform includes: a first pedal portion having a first side, a second side, a third side, and a fourth side. The first side is opposite to the third side and connected to the second side and the fourth side; a second pedal section has a fifth side, a sixth side, a seventh side, and an eighth side, The fifth side is opposite to the seventh side, and is connected to the sixth side and the eighth side. The fifth side is pivotally connected to the third side. The first pedal unit can be opposite to the first side. Two pedal parts are folded up; two first folding parts, each of which has a ninth side, a tenth side, an eleventh side, and a twelfth side, wherein the ninth side and the first side The eleven sides are opposite and connected to the tenth side and the twelfth side. The tenth sides of the two first folded portions are pivotally connected to the second and fourth sides of the first pedal portion, respectively. The first folding portion can be folded onto the first pedal portion; two second folding portions, each of which has a thirteenth side, a fourteenth side, and a first Five sides and a sixteenth side, where the thirteenth side is opposite to the fifteenth side and connected to the fourteenth side and the sixteenth side, and the fourteenth side of the two second folded parts is Pivotally connected to the sixth and eighth sides of the second pedal portion, the two second folding portions can be folded over to the second pedal portion; a third pedal portion having a seventeenth side, a The eighteenth side, a nineteenth side, and a twentieth side, wherein the seventeenth side is opposite to the nineteenth side and connected to the eighteenth side and the twentieth side, and the third pedal The seventeenth side of the part can be placed against the seventh side of the second pedal part; and two third folded parts, each of which has a twenty-first side and a twenty-second side. A twenty-third side and a twenty-fourth side, wherein the twenty-first side is opposite to the twenty-third side, and connected to the twenty-second side and the twenty-fourth side, the two The twenty-second side of the third folding portion is pivotally connected to the eighteenth and twentieth sides of the third pedal portion, respectively, and the two third folding portions can be folded onto the third pedal portion. The elevator shaft working platform according to item 1 of the scope of patent application, further comprising: a first protrusion provided on the third side; and a second protrusion provided on the fifth side and the second protrusion Is connected to the first protrusion to define a pivot, wherein the sum of the distance from the pivot to the first pedal portion and to the second pedal portion is sufficiently large so that when the two first folded portions are folded When the first pedal portion is folded onto the second pedal portion and the two second folded portions are folded onto the second pedal portion, the first pedal portion can be folded onto the second pedal portion, and the two first folded portions are still They can be stacked directly above the two second folds. The elevator shaft working platform according to item 1 of the scope of patent application, wherein when the two first folded portions and the two second folded portions are respectively folded onto the first pedal portion and the second pedal portion, the first A pedal portion can be folded up to be perpendicular to the second pedal portion. The elevator shaft working platform according to item 1 or 2 of the scope of patent application, wherein the first, second and third folding sections are capable of being retracted. The elevator shaft working platform described in item 1 of the scope of patent application, further includes: a shielding portion that is pivotally connected to the second folded portion and can be folded onto the first folded portion. The elevator shaft working platform according to item 5 of the scope of patent application, wherein the shielding portion is formed by a metal mesh. The elevator shaft working platform according to item 1 or 2 of the scope of patent application, further comprising: a plurality of fixing members, each of which includes a first fixing plate, a second fixing plate, a screw and a nut, the An opening is provided on the second fixing plate, and one end of the screw is welded to the first fixing plate. The screw can pass through the holes in the first, second or third pedal portions from top to bottom, and Through the opening in the second fixing plate, the nut can be locked on the screw to clamp a supporting material between the first fixing plate and the second fixing plate. The elevator shaft working platform described in item 2 of the scope of patent application, further comprising: a plurality of first pads provided on the first pedal portion, wherein when the first pedal portion is folded over the second pedal portion and When the two first folded portions are stacked directly above the two second folded portions, respectively, the first pads are in contact with the second pedal portion. The elevator shaft working platform described in item 2 of the scope of patent application, further comprising: a plurality of second pads disposed on the second pedal portion, wherein when the first pedal portion is folded over the second pedal portion and When the two first folded portions are stacked directly above the two second folded portions, the second pads are in contact with the first pedal portion. The elevator shaft working platform according to item 2 of the scope of patent application, further comprising: a plurality of first pads provided on the first pedal portion; and a plurality of second pads provided on the second pedal portion. Wherein, when the first pedal portion is folded onto the second pedal portion and the two first folded portions are stacked directly above the two second folded portions, respectively, the first pads are respectively connected with the second Pad contact.