Multifunctional sports equipment

Abstract

The present invention relates to a multifunctional sports equipment, which can be used to perform various sports such as Pilates, fitness, aerobics, etc. at low cost without requiring a large space at home or in the office. The present invention comprises: a main body (100) for supporting the upper body of a user; a first blade (200) connected to one side of the lower part of the main body (100) for supporting one foot of the user; and a second blade (300) connected to the other side of the lower part of the main body (100) for supporting the other foot of the user. The main body (100) comprises: a main body (110); a bracket (120); a first bracket (130); an elastic component (140); a first blade (200) connected to the lower part of the main body (100) for supporting the other foot of the user. ) and a length-variable component (160) disposed along the length direction of the bottom surface of the main body (110); and a first supporting component (170) and a second supporting component (180) respectively threadedly coupled to the main body (110), the first blade portion (200) comprising a main body (210), a handle (220), a second bracket (230) and a third supporting component (240), and the second blade portion (300) comprising a main body (310), a handle (320), a third bracket (330) and a fourth supporting component (340).

Description

Technical Field

[0001] The present invention relates to a multifunctional exercise apparatus, and more particularly, to a multifunctional exercise apparatus that can be used to perform various exercises such as Pilates, fitness, and aerobic exercise at low cost without requiring a large space in a home or office. Background Art

[0002] Recently, with the popularization of the five-day workweek, as one of the programs for maintaining health, many people go to the gym for weight training, or for women, they do Pilates exercises.

[0003] In addition, aerobic exercises such as swimming, walking, jogging, running, and riding a stationary bicycle, which require a long time of continuous and sufficient oxygen consumption, are also often performed.

[0004] However, most of the existing exercise apparatuses are designed to only intensify a certain muscle of the body. Therefore, in order to strengthen various muscles of the body, it is necessary to ensure having multiple exercise apparatuses.

[0005] As described above, the disadvantages are that a large amount of money is required to ensure having a variety of exercise apparatuses, and a large space is needed to store a variety of exercise apparatuses.

[0006] That is, a treadmill, as an apparatus mainly for running and walking exercises installed indoors, has disadvantages such as high price and many malfunctions, and when using gym facilities, a fee is required. In addition to the time spent on the road, one may also feel uncomfortable due to the use by an unspecified number of people.

[0007] Moreover, the multiple exercise apparatuses installed in outdoor sports facilities are each only used for a single exercise. Therefore, the problem is that it is very inconvenient to combine multiple exercises. Not only that, a large amount of space and installation costs are required to separately install exercise apparatuses suitable for each type.

[0008] Furthermore, recently, due to the COVID-19 pandemic sweeping the globe, it has become difficult to use gyms or Pilates facilities. As the time spent at home increases, people's attention to exercise has become higher. However, currently, there is no multifunctional exercise apparatus on the market that can perform Pilates, weight, and aerobic exercises simultaneously.

[0009] Therefore, there is an urgent need to develop a multifunctional exercise apparatus that can perform multiple functions in one device, and at the same time, can save space and reduce installation costs.

[0010] Prior Art Documents

[0011] Patent Documents

[0012] Patent Document 0001: Korean Registered Utility Model Publication No. 20-0449833 (August 25, 2010)

[0013] Patent Document 0002: Korean Utility Model Registration Bulletin No. 20-0405273 (January 11, 2006) Summary of the Invention

[0014] Technical Problem

[0015] The present invention has been made in view of the problems and necessities of the above prior art, and an object of the present invention is to provide a multi-functional exercise apparatus that reduces the cost of securing various exercise apparatuses and does not require securing space for installing exercise apparatuses.

[0016] Another object of the present invention is to provide a multi-functional exercise apparatus that can be easily combined for Pilates, fitness, and aerobic exercise at home or in the office, and allows for personal exercise without spending travel time.

[0017] Another object of the present invention is to provide a multi-functional exercise apparatus that can perform Pilates, weightlifting, and aerobic exercise simultaneously at home even when it is difficult to use a gym or Pilates facility due to the spread of infectious diseases, etc.

[0018] Technical Solution

[0019] To achieve the above object, the present invention provides a multifunctional exercise apparatus. The multifunctional exercise apparatus includes: a main body part 100 for supporting the upper body of a user; a first blade part 200 connected and provided on one side of the lower part of the main body part 100 for supporting one foot of the user; and a second blade part 300 connected and provided on the other side of the lower part of the main body part 100 for supporting the other foot of the user. The main body part 100 includes: a main body 110 having "C"-shaped processing parts 112 connected to a tube band 420 formed at each corner, an oval through-hole 114 formed at the center of one side, and first insertion holes 116 for disassembling and assembling a handle-cum-push-up bracket 500 formed on both sides of the upper surface. Second insertion holes 118 for disassembling and assembling a linear handle 600 are formed opposite to each other across the through-hole 114; a bracket 120 integrally formed along the length direction of the bottom surface of the main body 110, with anti-slip pads 120b attached to both ends of the upper surface; a plurality of first brackets 130 having semi-circular small recessed holes 136 formed on the left and right sides across a central "U"-shaped large recessed hole 134. The plurality of first brackets 130 are respectively threadedly coupled 132 to the bottom surface of the main body 110 and adjacent to the processing part 112; an elastic member 140, one end of which is inserted into the small recessed hole 136 and prevented from detaching from the small recessed hole 136 by a locking member 150; a length variable member 160 in which a medium pipe 164 with a smaller diameter is accommodated in a large pipe 162 with a specified diameter, and a small pipe 166 with a smaller diameter is accommodated in the medium pipe 164. The length variable member (160) is disposed along the length direction of the bottom surface of the main body 110 across the elastic member 140; and a first support member 170 and a second support member 180 are respectively threadedly coupled to the main body 110 while surrounding the outer peripheral surface of the large pipe 162. The first blade part 200 includes: a main body 210; a handle 220 assembled with a large pad 222 and a small pad 224 facing each other across the main body and fixedly provided along the width direction of the upper surface of the main body 210; a second bracket 230 threadedly coupled 232 to the bottom surface of the main body 210 across the small pipe 166 of the main body part 100; and a third support member 240 surrounding one side of the outer peripheral surface of the small pipe 166. The second blade part 300 includes: a main body 310; a handle 320 assembled with a large pad 322 and a small pad 324 facing each other across the main body and fixedly provided along the width direction of the upper surface of the main body 310; a third bracket 330 threadedly coupled 332 to the bottom surface of the main body 310 across the small pipe 166 of the main body part 100; and a fourth support member 340 surrounding one side of the outer peripheral surface of the small pipe 166.

[0020] In the present invention, wheels 224a are rotatably connected to both upper ends of the small backing plate 224 of the first blade portion 200, and wheels 324a are rotatably connected to both upper ends of the small backing plate 324 of the second blade portion 300.

[0021] Effects of the Invention

[0022] According to the multifunctional exercise apparatus of the present invention as described above, it has the following effects.

[0023] First, the compact multifunctional exercise apparatus can be stored under a table or in a corner of a balcony, etc. After being moved to the required exercise place through the wheels 224a and 334a, various types of Pilates, weight training, and aerobic training can be carried out. Therefore, the cost for ensuring multiple exercise apparatuses is reduced and there is no need to ensure space for installing the exercise apparatuses.

[0024] Second, there is no need to use gym facilities. Pilates, fitness, and aerobic exercises can be easily combined at home or in the office, and personal exercise can be carried out without spending travel time.

[0025] Third, even if it is difficult to use gym or Pilates facilities due to the spread of infectious diseases, etc., Pilates, weight, and aerobic exercises can be carried out simultaneously at home. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a plan side perspective view showing a multifunctional exercise apparatus according to an embodiment of the present invention.

[0027] Figure 2 It is a bottom side perspective view showing the multifunctional exercise apparatus of the present invention.

[0028] Figure 3 For Figure 2 partial exploded perspective view of.

[0029] Figure 4 For Figure 3 enlarged view of the main part of.

[0030] Figure 5 It is a top view showing the multifunctional exercise apparatus of the present invention.

[0031] Figure 6 It is a bottom view showing the multifunctional exercise apparatus of the present invention.

[0032] Figure 7 It is a bottom view showing the usage state of the multifunctional exercise apparatus of the present invention.

[0033] Figure 8 It is a partial perspective view showing the usage state of the multifunctional exercise apparatus of the present invention.

[0034] Figures 9 to 11 Side view showing the usage state of the multi-functional exercise apparatus of the present invention. Detailed implementation mode

[0035] Hereinafter, with reference to the accompanying drawings, the multi-functional exercise apparatus of the preferred embodiment of the present invention will be described in detail.

[0036] The terms or words used hereinafter should not be construed as being limited only to the ordinary or dictionary meanings. Based on the principle that the inventor can appropriately define the term concept to explain his own invention by the best method, it should be construed in accordance with the meanings and concepts conforming to the technical idea of the present invention.

[0037] Figure 1 Planar side perspective view showing the multi-functional exercise apparatus of an embodiment of the present invention, Figure 2 Bottom surface side perspective view showing the multi-functional exercise apparatus of the present invention, Figure 3 For Figure 2 Exploded perspective view of a part of

[0038] And, Figure 4 For Figure 3 Enlarged view of the main part of Figure 5 Top view showing the multi-functional exercise apparatus of the present invention, Figure 6 Bottom view showing the multi-functional exercise apparatus of the present invention.

[0039] And, Figure 7 Bottom view showing the usage state of the multi-functional exercise apparatus of the present invention, Figure 8 Partial perspective view showing the usage state of the multi-functional exercise apparatus of the present invention, Figures 9 to 11 Side view showing the usage state of the multi-functional exercise apparatus of the present invention.

[0040] Referring to Figures 1 to 7 , the multi-functional exercise apparatus of the present invention includes a main body part 100, a first blade part 200, and a second blade part 300.

[0041] The main body part 100 is mainly used to support the upper body of the user. Referring to Figure 1 , at each corner of the main body 110 with a width of about 45 cm, a length of about 60 cm, and a height of about 1 cm, a substantially "C"-shaped processing part 112 is formed through, and the processing part 112 is used to insert the end part of the tubing 420 of the tubing band assembly 400 (tubing band ass'y) described later. An oval through hole 114 for the user to insert and move the hand is formed at the central part on one side of the main body 110.

[0042] In this case, although the material of the main body 110 is not particularly limited, preferably, it is made of a wooden material in consideration of external aesthetics or a sense of luxury, etc. In addition, it can also be made of aluminum alloy or synthetic resin.

[0043] Referring to Figure 9 , the tube band assembly 400 can stimulate multiple parts by using the tension of an elastic band, and can be used for stretching, aerobic exercise, and weight training. One end of the tube band 420 is fixed inside the triangular hanging part 410 where the user holds with hands or inserts feet, and the other end (the end part) of the tube band is inserted into the processing part 112.

[0044] Moreover, on the upper surface of the main body 110, first insertion holes 116 with a specified diameter are respectively formed on the left and right sides. The first insertion holes 116 are used for disassembling and assembling the handle-cum-push-up bar 500, and second insertion holes 118 for disassembling and assembling the linear handle 600 are formed opposite to each other across the through hole 114.

[0045] In the handle-cum-push-up bar 500, a protruding rod (not shown) with a specified length that can be freely inserted and removed in the first insertion hole 116 is fixedly attached to the bottom surface of the backing plate 510 having a "C"-shaped cross section. The two end parts of the rod-shaped handle 512 are thread-assembled between the upper ends of the backing plate 510. The handle-cum-push-up bar 500 can rotate along the upper surface of the main body 110 at an angle convenient for the user in a state where the protruding rod is inserted into the first insertion hole 116.

[0046] In the linear handle 600, a protruding rod (not shown) with a specified length for insertion and removal in the second insertion hole 118 is fixedly attached to the lower part of the rod-shaped handle 610.

[0047] Moreover, referring to Figure 2 、 Figure 3 and Figure 6 , brackets 120 with a height of about 5 cm are respectively combined along the left and right length directions of the bottom surface of the main body 110. The two end parts of the brackets are combined with the main body 110 through threads 122, and anti-slip pads 120b are attached to the two end parts of the upper surface.

[0048] Moreover, on the bottom surface of the main body 110, a plurality of first brackets 130 having a substantially "┗"-shaped cross section are respectively thread-combined 132 adjacent to the processing part 112. In the first brackets 130, semicircular small recessed holes 136 are respectively formed on the left and right sides across the "U"-shaped large recessed hole 134 at the center.

[0049] Moreover, along the length direction of the bracket 120, a plurality of through holes 120a with a specified diameter are formed at equal intervals, and the linear handle 600 is selectively disassembled and assembled in the through holes 120a.

[0050] Moreover, one end of the elastic member 140 is inserted into the small recessed hole 136, and the other end of the elastic member 140 passes through another small recessed hole 136 to be connected to a second bracket 230 described later. The elastic member 140 is prevented from detaching from the small recessed hole 136 by a locking member 150 in the shape of a cap.

[0051] In this case, in the present invention, a telescopic tube band 420 is formed as the elastic member 140, but it is not limited thereto, and it may also be a rubber band, a spring, or the like.

[0052] Moreover, a length variable member 160 is provided along the length direction of the bottom surface of the main body 110 with the elastic member 140 interposed therebetween. In this length variable member, a medium diameter pipe 164 with a smaller diameter is accommodated in a large diameter pipe 162 with a specified diameter, and a small diameter pipe 166 with a smaller diameter is accommodated in the medium diameter pipe 164.

[0053] In this case, referring to Figure 6 , on the upper surface of the main body 110, a plurality of threads (not shown) are threadedly engaged with the bottom surface of the first support member 170 in a state where the outer peripheral surface side of the large diameter pipe 162 is surrounded by a first support member 170 in the shape of a hollow tunnel.

[0054] Moreover, on the upper surface of the main body 110, a plurality of threads (not shown) are threadedly engaged with the bottom surface of the second support member 180 in a state where the outer peripheral surface side of the large diameter pipe 162 is surrounded by the second support member 180. The second support member 180 has the same shape as the first support member 170.

[0055] Moreover, as the thread 172 penetrates the first support member 170 and is engaged with the large diameter pipe 162 at a specified depth, the large diameter pipe 162 can be prevented from separating from the first support member 170.

[0056] Referring to Figure 2 , Figure 5 and Figure 6 , for convenience, a first blade portion 200 is connected and provided on the lower side of the main body portion 100 and is mainly used to support one foot of the user. A handle 220 is fixedly provided along the width direction on one side of the upper surface of a main body 210 having a width of about 16 cm, a length of about 25 cm, and a height of about 1 cm. In this handle 220, a large backing plate 222 and a small backing plate 224 having a "C" - shaped cross - section face each other across the main body 210, and after bolts 226 penetrate through the respective corners of the large backing plate 222 and the small backing plate 224 in sequence, they are assembled with nuts 228.

[0057] Moreover, wheels 224a are rotatably connected to both upper ends of the small backing plate 224.

[0058] And, referring to Figure 3 and Figure 4 , the second bracket 230 is threadedly coupled to the bottom surface of the main body 210 via threads 232 respectively with a small pipe 166 therebetween. In this second bracket, semicircular small recessed holes 236 are respectively formed on the left and right sides with a central "U"-shaped large recessed hole 234 therebetween.

[0059] And, after the other end of the elastic member 140 is inserted into the small recessed hole 236, it is prevented from disengaging from the small recessed hole 236 by the locking member 150, and one end of the large pipe 162 is supported by the large recessed hole 134 of the first bracket 130 and the large recessed hole 234 of the second bracket 230.

[0060] And, in a state where the outer peripheral surface of the small pipe 166 is surrounded by a third support member 240 on the other side, on the upper surface of the main body 210, a plurality of threads (not shown) are threadedly coupled to the bottom surface of the third support member 240, and the third support member 240 has the same shape as the first support member 170.

[0061] And, as the thread 244 penetrates the third support member 240 and is coupled to the small pipe 166 at a predetermined depth, the tilting phenomenon during the insertion and extraction of the small pipe 166 can be prevented.

[0062] Referring to Figure 2 , Figure 5 and Figure 6 , for convenience, the second blade portion 300 is connected and provided at the lower part on the other side of the main body portion 100 and is mainly used to support the other foot of the user. A handle 320 is fixedly provided along the width direction on one side of the upper surface of the main body 310. In this handle, with a large backing plate 322 and a small backing plate 324 facing each other across the main body 310, after bolts 326 penetrate through the respective corners of the large backing plate 322 and the small backing plate 324 in sequence, they are assembled with nuts 328.

[0063] And, wheels 324a are rotatably connected to both upper ends of the small backing plate 324.

[0064] And, referring to Figure 3 and Figure 4 , the third bracket 330 is threadedly coupled to the bottom surface of the main body 310 via threads 332 respectively with a small pipe 166 therebetween. In this third bracket 330, small recessed holes 336 are respectively formed on the left and right sides with a large recessed hole 334 therebetween.

[0065] And, after the other end of the elastic member 140 is inserted into the small recessed hole 336, it is prevented from disengaging from the small recessed hole 336 by the locking member 150, and one end of the large pipe 162 is supported by the large recessed hole 134 of the first bracket 130 and the large recessed hole 334 of the third bracket 330.

[0066] Further, in a state where the outer peripheral surface of the small pipe 166 is surrounded by the fourth support member 340 on the other side, on the upper surface of the main body 310, a plurality of threads (not shown) are threadedly engaged with the bottom surface of the fourth support member 340, and the fourth support member 340 has the same shape as the first support member 170.

[0067] Moreover, as the thread 344 penetrates through the fourth support member 340 and is engaged with the small pipe 166 at a specified depth, it is possible to prevent the tilting phenomenon during the insertion and removal of the small pipe 166.

[0068] Hereinafter, the operation of the present invention having the above-described structure will be described.

[0069] First, move the multifunctional exercise apparatus stored under the table or in the corner of the balcony to the desired position. That is, insert the hand into the through hole and move to the desired exercise location through the wheels 224a and 334a of the multifunctional exercise apparatus.

[0070] After that, insert the end portion of the tube band 420 into the processing portion 114 of the main body 110, connect the handle-cum-push-up bracket 500 to the first insertion hole 116 of the main body 110, and connect the linear handle 600 to the second insertion hole 118.

[0071] Refer to Figure 9 , Figure 9 illustrates performing Pilates using the multifunctional exercise apparatus of the present invention. Refer to Figure 9 ,hold the handle-cum-push-up bracket 500 with both hands respectively, and press the left knee against the upper surface of the main body 210 of the first blade portion 200.

[0072] Moreover, after inserting the right foot into the inside of the hanging portion 410 of the tube band assembly 400, when the right foot repeatedly performs a stretching motion centered on the knee, the length of the tube band 420 is shortened or lengthened in conjunction with this, and through this elasticity, the muscles of the lower body are strengthened, which is beneficial for stabilizing the body.

[0073] Refer to Figure 10 , Figure 10 illustrates performing weight training using the multifunctional exercise apparatus of the present invention. Refer to Figure 10 ,hold the handle-cum-push-up bracket 500 with both hands respectively, and press the feet against the upper surfaces of the main bodies 210 and 310 of the first blade portion 200 and the second blade portion 300 respectively, so that the body and the multifunctional exercise apparatus are separated by a specified interval vertically.

[0074] After that, when the feet repeatedly perform a stretching motion, the length of the tube band 420 is shortened or lengthened in conjunction with this, and the first blade portion 200 and the second blade portion 300 are moved toward or away from the main body portion 100, and the elasticity of the tube band 420 is beneficial for maintaining the center of the body through core exercises.

[0075] Refer to Figure 11 , Figure 11 which shows aerobic training using the multifunctional exercise apparatus of the present invention. Refer to Figure 11 , hold the linear handles 600 with both hands respectively, press one foot against the upper surface of the main body 210 of the first blade part 200 and press the other foot against the upper surface of the main body 310 of the second blade part 300. Then, when the feet repeatedly perform the action of alternately moving forward and backward, the length of the tube belt 420 is shortened or lengthened in linkage therewith, and the first blade part 200 and the second blade part 300 are moved toward or away from the main body part 100. The elasticity of the tube belt 420 is beneficial to improving aerobic capacity through rock climbing exercise.

[0076] In Figures 9 to 11 , although an example of Pilates, weight training, and aerobic training is described using the multifunctional exercise apparatus of the present invention, it is not limited thereto. In addition to the actions shown in the drawings, various other actions can be performed.

[0077] In the above process, according to the present invention, the advantage is that the compact multifunctional exercise apparatus can be stored under a table or in a corner of a balcony, etc., and after being moved to the required exercise place through the wheels 224a, 334a, various types of Pilates, weight training, and aerobic training can be performed. Therefore, the cost for ensuring multiple exercise apparatuses is reduced and there is no need to ensure the space for installing the exercise apparatuses.

[0078] Moreover, there is no need to use gym facilities, and Pilates, fitness, and aerobic exercises can be easily combined at home or in the office, and personal exercise can be performed without spending travel time.

[0079] Furthermore, even if it is difficult to use gym or Pilates facilities due to the spread of infectious diseases, etc., Pilates, weight, and aerobic exercises can be performed simultaneously at home.

[0080] The multifunctional exercise apparatus of the present invention as described above has been described with reference to the illustrated drawings. The present invention is not limited to the embodiments and drawings disclosed in this specification, and it is obvious that those of ordinary skill in the technical field to which the present invention pertains can make various changes within the scope of the technical idea of the present invention.

[0081] Explanation of reference numerals

[0082] 100: Main body part 110, 210, 310: Main body

[0083] 120: Bracket 130: First bracket

[0084] 140: Elastic member 150: Locking member

[0085] 160: Variable-length component 170: First support component

[0086] 180: Second support component 200: First blade part

[0087] 230: Second bracket 240: Third support component

[0088] 300: Second blade part 330: Third bracket

[0089] 400: Tube belt assembly 500: Handle and push-up support

[0090] 600: Straight handle

Claims

1. A multi-functional exercise apparatus, characterized in that, The above multi-functional exercise apparatus includes: A main body part (100) for supporting the upper body of the user; A first blade part (200) connected and arranged on one side of the lower part of the above main body part (100) for supporting one foot of the user; and A second blade part (300) connected and arranged on the other side of the lower part of the above main body part (100) for supporting the other foot of the user, The above main body part (100) includes: A main body part main body (110) with "C"-shaped processing parts (112) connected to the tube belt (420) formed at each corner, an oval through hole (114) formed at the center of one side, and first insertion holes (116) for disassembling and assembling the handle-cum-push-up bracket (500) formed on both sides of the upper surface, and second insertion holes (118) for disassembling and assembling the straight handle (600) formed opposite to each other across the above through hole (114); A bracket (120) respectively combined along the length direction of the bottom surface of the above main body part main body (110), with anti-slip pads (120b) attached to both ends of the upper surface; A plurality of first brackets (130) with semi-circular small recessed holes (136) formed on the left and right sides respectively across the "U"-shaped large recessed hole (134) at the center, and the above plurality of first brackets (130) are respectively threadedly combined (132) with the bottom surface of the above main body part main body (110) and adjacent to the above processing part (112); An elastic member (140), one end of which is inserted into the above small recessed hole (136) and is prevented from detaching from the above small recessed hole (136) by a locking member (150); A length variable member (160) in which a medium pipe (164) with a smaller diameter is accommodated in a large pipe (162) with a specified diameter, and a small pipe (166) with a smaller diameter is accommodated in the above medium pipe (164), and the above length variable member (160) is arranged along the length direction of the bottom surface of the above main body part main body (110) across the above elastic member (140); and A first support member (170) and a second support member (180) respectively threadedly combined with the above main body part main body (110) in a state of surrounding the outer peripheral surface of the above large pipe (162), The above first blade part (200) includes: A first main body (210); A first handle (220), with a first large backing plate (222) and a first small backing plate (224) assembled in a state of facing each other across the above first main body (210), and the above first handle (220) is fixedly arranged on both sides of the upper end of the above first large backing plate (222) along the width direction of the upper surface of the above first main body (210); A second bracket (230) respectively threadedly combined (232) with the bottom surface of the above first main body (210) across the small pipe (166) of the above main body part (100); and A third support member (240) on one side of the outer peripheral surface of the above small pipe (166), The above second blade part (300) includes: A second main body (310); The second handle (320) assembles the second large backing plate (322) and the second small backing plate (324) in a state facing each other across the second main body (310), and the second handle (320) is fixedly arranged on both sides of the upper end of the second large backing plate (322) along the width direction of the upper surface of the second main body (310); The third bracket (330) is threadedly coupled (332) to the bottom surface of the second main body (310) across the small pipe (166) of the main body portion (100); and The fourth support member (340) is around one side of the outer peripheral surface of the small pipe (166).

2. The multifunctional exercise apparatus according to claim 1, wherein On both sides of the upper end of the first small backing plate (224) of the first blade portion (200), a first wheel (224a) is rotatably connected, and on both sides of the upper end of the second small backing plate (324) of the second blade portion (300), a second wheel (324a) is rotatably connected.

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