JP2007061379A - Movable load-carrying platform structure of golf card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable load-carrying platform structure of a golf cart, capable of arbitrarily adjusting the angle of inclination in a wide range. <P>SOLUTION: A movable load-carrying platform 21 for mounting a golf bag 18 in the golf cart 10 is disposed in a cowl 11a in such a way that the front end of the movable load-carrying platform is rotatable in the vertical direction. The movable load-carrying platform 21 is composed of a bottom receiving part 30 for supporting the bottom of the golf bag 18 and a side receiving part 23 for receiving a side of the golf bag 18. The bottom receiving part 30 is connected to the side receiving part 23 via a bolt 33, etc. in such a way as rotatable. An abutting member 35 is provided at a bottom receiving part support part 30a of the bottom receiving part 30, so that the angle between the bottom receiving part 30 and the side receiving part 23 will not be larger than a prescribed angle when the bottom receiving part 30 is rotated in the direction of separating from the side receiving part 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a movable loading platform structure for a golf cart in which a loading platform for loading a golf bag is provided at the rear of a vehicle body with an inclination angle adjustable.

  Conventionally, some golf carts are provided with a loading platform for loading a golf bag at the rear of the vehicle body, and such loading platform has variable means for adjusting the tilt angle. (For example, refer to Patent Document 1). This variable means is the position of the loading platform when loading and unloading the golf bag (horizontal state) and the position when loading and unloading the club from the golf bag (inclined so that the rear end portion is slightly above) And change to In other words, the variable means is in an upright state on the upper side of the rear part of the vehicle body that extends downward while the rear side of the upper surface is curved, and on the lower side of the rear part of the vehicle body, provided with a carrier (loading platform) that can be rotated up and down around the front end. The loading / unloading position fixing frame provided in the above and a club loading / unloading position fixing frame having one end portion rotatably connected to the rear end side portion of the carrier and the other end portion being detachable from the upper side portion of the loading / unloading position fixing frame. It consists of and.

  Then, when loading and unloading the golf bag, the club loading / unloading position fixing frame is removed from the loading and unloading position fixing frame so as to be along the carrier, and the carrier is supported by the upper end of the loading and unloading position fixing frame to be in a horizontal state. Also, when the club is put in and out of the golf bag with the golf bag placed on the carrier, the carrier is moved upward and the other end of the club loading / unloading position fixing frame is unloaded and placed on the upper side portion of the position fixing frame. By engaging, the carrier is supported in an inclined state by the loading / unloading position fixing frame and the club loading / unloading position fixing frame.

The carrier further includes a pair of left and right support frames bent in an L-shape and a bottom frame spanned between the bottoms of the pair of support frames. A support stay having a rubber damper attached thereto is provided. When the carrier is tilted so that the rear end portion is turned upward, the bottom frame hits the rubber damper and is supported by the support stay via the rubber damper.
Japanese Patent Laid-Open No. 10-146408

  However, in this conventional golf cart, since the carrier can only rotate until the bottom frame hits the rubber damper, the carrier cannot be sufficiently directed upward. For this reason, when a plurality of golf carts are stored side by side, a large storage space is necessary because the golf carts cannot interfere with each other due to the obstacle.

  The present invention has been made to address the above-described problems, and an object of the present invention is to provide a movable loading platform structure for a golf cart capable of adjusting an inclination angle within a large range.

  In order to achieve the above-mentioned object, the structural feature of the movable loading platform structure of the golf cart according to the present invention is that the loading platform for loading a golf bag can be rotated in the vertical direction with one end side portion of the loading platform as a fulcrum. A movable cart structure for a golf cart provided at the rear of the vehicle body so that the tilt angle can be adjusted, and the platform supports a bottom receiving portion that supports the bottom portion of the golf bag, and a side that supports the side portion of the golf bag There is a receiving portion, and the bottom receiving portion and the side receiving portion are connected to each other in a rotatable state via a rotating shaft that is arranged in alignment with the central axis in the vehicle width direction.

  Thus, in the movable loading platform structure of the golf cart according to the present invention, the loading platform on which the golf bag is loaded includes the bottom receiving portion that supports the bottom portion of the golf bag and the side receiving portion that supports the side portion of the golf bag. The bottom receiving part and the side receiving part are connected in a rotatable state via a rotating shaft arranged in the vehicle width direction. For this reason, the loading platform is rotated upward about the fulcrum on one end side, and the bottom receiving portion and the side receiving portion can rotate with each other even when the bottom receiving portion hits the rear portion of the vehicle body. Thus, the side receiving portion can be rotated upward so as to approach the bottom receiving portion. As a result, when the golf bag is not loaded on the loading platform, the loading platform can be raised to a substantially vertical state, and the length in the front-rear direction of the golf cart in that case is shortened. As a result, when a plurality of golf carts are stored side by side, the golf carts can be brought close to each other and the storage space can be narrowed.

  Another structural feature of the movable cart structure of the golf cart according to the present invention is that the angle between the bottom receiving portion and the side receiving portion is determined when the bottom receiving portion rotates in a direction away from the side receiving portion. There is a restriction means for restricting to a predetermined angle. The predetermined angle in this case can be any angle, but is preferably a right angle. According to this, when the loading platform is positioned below, the bottom receiving portion can be held at an appropriate angle for supporting the golf bag with respect to the side receiving portion, and the angle between the bottom receiving portion and the side receiving portion is necessary. It can prevent becoming larger than the above.

  Still another structural feature of the movable cart structure of the golf cart according to the present invention resides in that the restricting means is composed of a contact member provided on at least one of the bottom receiving portion and the side receiving portion. In this case, the contact member may be provided on one or both of the bottom receiving part and the side receiving part. When provided on one side, when the contact member abuts against a predetermined portion of the bottom receiving part or the side receiving part, the bottom receiving part is no longer separated from the side receiving part, and provided on both sides. When the abutting members come into contact with each other, the bottom receiving portion is no longer separated from the side receiving portion. According to this, the restricting means can be a simple and strong structure.

  Further, another structural feature of the movable cart structure of the golf cart according to the present invention is that a fulcrum is provided at one end portion of the side receiving portion, and the rotation shaft is separated from one end portion of the side receiving portion by a predetermined distance. The contact position between the bottom receiving portion side portion and the side receiving portion side portion in the restricting means is located between the fulcrum and the rotating shaft. According to this, since it is not necessary to arrange the abutting member constituting the restricting means in the loading area of the golf bag in the loading platform, the restricting means and the golf bag do not interfere with each other, and it is easy to load and unload the golf bag. Further, it is possible to prevent the golf bag from being damaged by contact of the golf bag with the contact member constituting the regulating means.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 and 2 show a golf cart 10 including a movable bed structure 20 according to the embodiment. This golf cart 10 includes four wheels 12 provided on the left and right sides of the front and rear of the lower part of the vehicle body 11 and a front seat 13a for two persons provided on the front and rear of the central part in the vehicle body 11. And a rear seat 13b for three persons. A handle 14 is provided at the front portion of the front seat 13a, and an accelerator pedal and a brake pedal (not shown) are provided below the handle 14 side by side. Furthermore, a roof portion 16 is provided on the upper portion of the vehicle body 11 via support frames 15 provided at four corners of the vehicle body 11.

  Further, a bumper 17 a is attached to the lower part of the rear end of the cowl 11 a constituting the rear part of the vehicle body 11, and a bumper 17 b is attached to the lower part of the front end of the vehicle body 11. A movable cargo bed structure 20 for loading the golf bag 18 is provided on the upper portion of the cowl 11a. In this golf cart 10, the driver sitting on the front seat 13 a rotates the handle 14 to change the direction of the front wheels 12 to the left and right, and the golf cart 10 turns left or right. While traveling, change the direction of travel. When the driver depresses the accelerator pedal, the golf cart 10 travels while accelerating according to the amount of depression of the accelerator pedal.

  In this case, the acceleration of the golf cart 10 increases as the amount of depression of the accelerator pedal increases, and the acceleration of the golf cart 10 decreases as the amount of depression of the accelerator pedal decreases. Further, if the accelerator pedal depression amount is kept constant, the golf cart 10 travels at a constant speed. When the driver depresses the brake pedal, the rotational drive of each wheel 12 is braked according to the amount of depression of the brake pedal. In this case, the braking force applied to each wheel 12 is proportional to the depression amount of the brake pedal.

  As shown in FIG. 3, the movable carrier structure 20 is composed of a movable carrier part 21 as a carrier of the present invention and a support arm part 22. In addition, the movable loading platform 21 includes a side receiving portion 23 that is rotatably attached to the lower rear side of the vehicle body 11 and a bottom receiving portion 30 that is rotatably connected to a lower end side portion of the side receiving portion 23. It consists of and. The side receiving portion 23 has a pair of rod-shaped main bodies 25a and 25b attached to the rear portion of the vehicle body 11 in a state of being rotatable in the vertical direction with the front end portion (lower end portion) as a fulcrum, and the rear end portions of the rod-shaped main bodies 25a and 25b. It is composed of a rod-shaped main body 27 that is stretched, a front support member 26a that is stretched on the upper surface of the front side portion of the rod-shaped main bodies 25a and 25b, and a rear support member 26b that is attached to the upper surface of the rod-shaped main body 27. ing.

The left and right side portions of the front support member 26a and the rear support member 26b are curved obliquely upward, so that when the golf bag 18 is placed on the side receiving portion 23, the golf bag 18 The part support member 26a and the rear support member 26b are not dropped from both sides. A rotation support portion 27 a is attached to the center front portion of the rod-shaped main body 27.

  Further, shaft holes (not shown) are formed in the front end portions of the rod-like main bodies 25a and 25b, respectively, along the central axis in the vehicle width direction. As shown in FIGS. 4 to 6, the rod-shaped main bodies 25 a and 25 b can be rotated in the vertical direction by engaging the shaft holes with the bed support portions 28 attached to the rear portion of the vehicle body 11. In the state, it is connected to the rear part of the vehicle body 11. That is, the loading platform support portion 28 is fixed to the rear end portion of the vehicle body 11 so as to extend in the vertical direction, and to the upper end portion of the fixing portion 28a with the shaft hole directed in the vehicle width direction. The cylindrical rotation support part 28b and the bolt 28c are comprised.

Then, with the shaft hole of the rotation support portion 28b and the shaft hole of the rod-like main bodies 25a, 25b being aligned, the bolt-shaped body 25a, 25b and each loading platform support portion 28 are inserted by inserting bolts 28c into both the shaft holes. It is connected. Further, bottom receiving portion support portions 30a are connected to the lower end portions of the rod-like main bodies 25a and 25b, respectively, so as to be rotatable in the vertical direction, and are stretched over the upper surfaces of the both bottom receiving portion support portions 30a. In this state, a plate-shaped bag bottom receiving portion 30 b is fixed via a bolt 24. The bottom receiving part 30 is comprised by this bottom receiving part support part 30a and the bag bottom receiving part 30b.

The bottom support part 30a has a U-shaped support part body 31 having a ceiling part and both side parts, and a shaft insertion hole extending rearward from the both side parts of the support part body 31 in the left-right direction. The pair of support pieces 32a and 32b are provided. In addition, shaft holes 25c having a central axis in the vehicle width direction are provided at substantially the center between the portion of the rod-shaped main bodies 25a and 25b where the front support member 26a is attached and the portion connected to the loading platform support portion 28, respectively. Is formed. And the bottom receiving part support part 30a is connected with the rod-shaped main bodies 25a and 25b by aligning the shaft insertion hole with the shaft hole 25c and inserting the bolt 33 into the shaft insertion hole and the shaft hole 25c.

  Moreover, the boundary part of the support part main body 31 and the support pieces 32a and 32b inside the bottom receiving part support part 30a is partitioned by a plate-shaped partition wall 34, and the restriction means of the present invention is provided on the partition wall 34. A contact member 35 is attached. The contact member 35 is made of elastic rubber, and has a cylindrical damper portion 35a having a short axial length and a cylindrical dropout preventing portion 35b having a short axial length and a tapered front portion. And a cylindrical connecting portion 35c having a short axial length connecting the damper portion 35a and the drop-off preventing portion 35b.

In addition, a hole 34a having a diameter slightly larger than the diameter of the connecting portion 35c is formed in the center of the partition wall 34, and the abutting member 35 allows the drop prevention portion 35b to be moved from the rear side of the hole 34a to the front portion. The connecting portion 35c is fixed to the partition wall 34 with the connecting portion 35c positioned in the hole portion 34a. As shown in FIG. 6, the abutting member 35 is located away from the rod-like main bodies 25a and 25b when the rod-like main bodies 25a and 25b are in a vertical state or close to a vertical state. Located in.

When the rod-like main bodies 25a and 25b are rotated downward to reach the state shown in FIG. 4, even if the bottom receiving portion 30 is rotated away from the rod-like main bodies 25a and 25b, the contact member 35 abuts on the rod-shaped main bodies 25a and 25b, and the bottom receiving portion 30 is regulated so as not to be further separated from the rod-shaped main bodies 25a and 25b. FIG. 8 shows a state where the contact member 35 and the rod-shaped main body 25a shown in FIG.

Further, the support arm portion 22 is configured by a link mechanism including a foldable support portion 36 including a pair of rod-shaped members 36 a and 36 b and an extendable rod 37. Further, the rod-like members 36 a and 36 b constituting the foldable support portion 36 are connected to each other via a rotary connecting portion 38 in a rotatable state. The rotation connecting portion 38 is provided at one end portion of the rod-shaped member 36b and includes a rotation support portion 38a having a pair of left and right support pieces facing each other, and extends in the horizontal direction from the other end portion of the rod-shaped member 36a. The rotary shaft 38b is rotatably connected to the rotary shaft 38b, and the rotary shaft 38b is rotatable only in the direction around the axis extending in the horizontal direction.

  One end portion of the rod-shaped member 36a is connected to the upper side portion of the rear portion of the vehicle body 11 via the rotation connecting portion 39, and the other end portion of the rod-shaped member 36b is connected to the side receiving portion 23 via the rotation connecting portion 41. It is connected to the rear support member 26b. The rotation connecting portion 39 includes a rotation support portion 39a provided with a pair of left and right support pieces provided on the upper side portion of the rear portion of the vehicle body 11 via an attachment frame 39c, and a horizontal direction from one end of the rod-shaped member 36a. And a rotation shaft 39b rotatably connected to the rotation support portion 39a. The rotation shaft 39b is rotatable only in the direction around the axis extending in the horizontal direction.

The rotation connecting portion 41 includes the rotation support portion 27a described above, and a rotation shaft 41a extending in the horizontal direction from the other end of the rod-shaped member 36b and rotatably connected to the rotation support portion 27a. The rotation shaft 41a is rotatable only in the direction around the axis extending in the horizontal direction. For this reason, when the rod-shaped members 36a and 36b extend linearly, the side receiving portion 23 comes to be positioned downward as shown by the solid line in FIG. 2, and the rod-shaped members 36a and 36b are bent and bent. As the angle increases, the side receiving portion 23 approaches an upright state indicated by a two-dot chain line.

  The telescopic rod 37 includes a cylinder 37a, a rod 37b that can move forward and backward in the cylinder 37a, a lever (not shown) attached to the cylinder 37a so as to be rotatable about the axis of the cylinder 37a, And coiled springs (not shown) installed on both sides of the lever. Each of the springs has an outer end fixed to the cylinder 37a and an inner end fixed to the lever. Normally, the spring 37 is fixed by tightening the rod 37b. Further, when the lever is rotated in one direction, the tightening force of the rod 37b by the spring is reduced, and the rod 37b can be moved to a predetermined position along the longitudinal direction of the cylinder 37a.

  Further, one end of the telescopic rod 37 is connected to one end side portion of the lower surface of the rod-shaped member 36 a via the rotation coupling portion 42, and the other end of the telescopic rod 37 is coupled to the rod-shaped member 36 b via the rotation coupling portion 43. It is connected to a substantially central portion on the lower surface of the. The rotation connecting portion 42 includes a rotation shaft 42a that is provided at one end of the rod 37b and extends in the horizontal direction, and a rotation support portion 42b that is provided on the lower surface of the rod-shaped member 36a and rotatably supports the rotation shaft 42a. The rotation shaft 42a is rotatable only in the direction around the axis extending in the horizontal direction.

  The rotation connecting portion 43 is provided at the other end portion of the cylinder 37a and includes a rotation shaft 43a extending in the left-right direction and a rotation support portion 43b provided on the lower surface of the rod-shaped member 36b and rotatably supporting the rotation shaft 43a. The rotating shaft 43a is configured to be rotatable only in the direction around the axis extending in the horizontal direction. In addition, a lock release lever 45 is connected to the lever via a cable 44. The lock release lever 45 is attached to the right side portion of the lower surface of the rod-shaped main body 27 along the longitudinal direction of the rod-shaped main body 27, and is attached so as to be separated from the rod-shaped main body 27 by a spring member (not shown). It is energized.

Then, when the lock release lever 45 is operated to approach the rod-shaped main body 27, the lever rotates to reduce the tightening force of the rod 37b by the spring so that the rod 37b can be moved. Further, when the lock release lever 45 is released and moved away from the rod-shaped main body 27, the lever returns to the original position, and the tightening force of the rod 37b by the spring is increased, and the rod 37b is fixed to the cylinder 37a. For this reason, the inclination angle of the movable platform 21 can be adjusted to an arbitrary angle by moving the movable platform 21 up and down while operating the lock release lever 45.

  Next, the case where the movable carrier structure 20 of the golf cart 10 configured as described above is used will be described. In this case, first, the telescopic rod 37 is extended or contracted while the lock release lever 45 is pushed to the rod-shaped main body 27 side, so that the position of the side receiving portion 23 is the state shown in FIG. 1 or the state shown in FIG. Adjust the position so that it is slightly higher. Next, after releasing the lock release lever 45 and fixing the side receiving portion 23 in that position, the bottom receiving portion 30 is rotated to be separated from the rod-shaped main bodies 25a and 25b. At this time, the angle between the bottom receiving portion 30 and the rod-like main bodies 25a and 25b is substantially a right angle. Then, the golf bag 18 is placed on the movable bed 21.

In this case, a total of four golf bags 18 can be placed on the movable loading platform 21, two on each side, with the support arm portion 22 interposed therebetween, and each golf bag 18 has a bottom receiving portion 30. The bag bottom receiving portion 30b is placed on the movable platform 21 in a state where the lower side portion and the upper side portion of the side portion are respectively brought into contact with the front support member 26a and the rear support member 26b. In this state, the golf cart 10 is driven and traveled to go around the course of the golf course. Then, when the use of the golf cart 10 is finished and the golf cart 10 is collected at a predetermined place, the golf bag 18 is lowered from the movable loading platform 21.

Next, in a state where the lock release lever 45 is pushed to the rod-shaped main body 27 side, the rear support member 26b of the movable loading platform 21 is pushed upward, and the state indicated by the two-dot chain line in FIG. When the movable platform 21 is in a substantially vertical state, the lock release lever 45 is released to fix the movable platform 21 in that position. In this case, the lock release lever 45 and the rear support member 26b can be operated with one hand. In addition, when the movable carrier 21 is in a substantially vertical state as described above, the movable carrier 21 and the support arm 22 do not protrude rearward, so that they do not get in the way. As a result, the plurality of golf carts 10 can be approached and efficiently accommodated.

  Thus, in the movable carrier structure 20 according to the present embodiment, the movable carrier part 21 on which the golf bag 18 is loaded includes the side receiving part 23 that supports the side part of the golf bag 18 and the bottom part of the golf bag 18. The bottom receiving part 30 to support is provided. And the bottom receiving part 30 is connected with the side receiving part 23 in the state which can rotate via the bottom receiving part support part 30a. For this reason, when the movable carrier 21 is rotated upward, even if the bottom receiving portion 30 hits the cowl 11a, the side receiving portion 23 remains at the bottom of the cowl 11a while the bottom receiving portion 30 remains stationary. It can be rotated further as it approaches.

As a result, when the golf bag 18 is not loaded on the movable platform 21, the movable platform 21 can be raised to a substantially vertical state, and the length in the front-rear direction of the golf cart 10 in that case is shortened. . Thereby, the storage space in the case of storing a plurality of golf carts 10 side by side can be reduced. Further, a contact member 35 is provided on the bottom receiving portion support portion 30 a so that the bottom receiving portion 30 is not separated from the side receiving portion 23 by a predetermined angle or more. According to this, when the movable platform 21 is positioned below, the bottom receiving portion 30 can be held at an appropriate angle for supporting the golf bag 18 with respect to the side receiving portion 23, It is possible to prevent the angle with the side receiving portion 23 from becoming larger than necessary.

  Further, according to the abutting member 35, the restricting means can have a simple and strong structure. Further, since the bottom receiving portion support portion 30a is connected to the approximate center between the portion of the rod-like main bodies 25a and 25b where the front support member 26a is attached and the portion connected to the cargo bed support portion 28, the bottom receiving portion support portion 30a. However, it does not interfere with the golf bag 18 loaded and unloaded on the movable platform 21. As a result, the golf bag 18 is not damaged by the bottom receiving portion support portion 30a, and the bottom receiving portion support portion 30a does not interfere with the loading and unloading work of the golf bag 18.

  The present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications within the technical scope of the present invention. For example, in the above-described embodiment, the abutting member 35 is provided on the bottom receiving portion support portion 30a. However, the abutting member is attached to the rod-like main bodies 25a and 25b, and the abutting member and the bottom receiving portion support portion 30a. When the predetermined portion comes into contact, the angle between the bottom receiving portion 30 and the side receiving portion 23 in the separating direction can be regulated. Further, a predetermined abutting member is provided on both the bottom receiving portion support portion 30a and the rod-like main bodies 25a and 25b, and the bottom receiving portion 30 and the side receiving portion 23 are separated when the both abutting members abut. The angle to the direction can also be regulated. Moreover, it can change suitably also about each part which comprises the golf cart 10 other than that and the movable carrier structure 20. As shown in FIG.

It is the side view which showed the golf cart provided with the movable carrier structure which concerns on one Embodiment of this invention. It is the side view which showed the state which moves the movable bed part of the movable bed structure with which a golf cart is equipped. It is the perspective view which showed the state which looked at the movable carrier structure from back. It is a partially cutaway sectional view showing the relation between the bottom receiving part support part and the rod-shaped main body when the movable carrier part is positioned below. It is a partially cutaway sectional view showing the relationship between the bottom receiving portion support portion and the rod-shaped main body when the movable load carrier portion is positioned slightly above. It is a partially cutaway sectional view showing the relationship between the bottom receiving portion support portion and the rod-shaped main body when the movable platform is in a substantially vertical state. It is the perspective view which showed the connection state of a bottom receiving part and a side receiving part. It is the bottom view which showed the connection state of a bottom receiving part and a side receiving part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Golf cart, 11 ... Car body, 11a ... Cowl, 18 ... Golf bag, 20 ... Movable load carrier structure, 21 ... Movable load carrier part, 23 ... Side receiving part, 25a, 25b ... Rod-shaped main body, 25c ... Shaft hole, 26a ... front support member, 26b ... rear support member, 28 ... load carrier support portion, 28b ... rotation support portion, 28c, 33 ... bolt, 30 ... bottom receiving portion, 30a ... bottom receiving portion support portion, 32a, 32b ... support One piece, 35 ... a contact member.

Claims (4)

A movable cart structure for a golf cart provided at the rear of a vehicle body, wherein a loading platform for loading a golf bag can be adjusted in an up-and-down direction by allowing the loading platform to rotate up and down with one end portion of the loading platform as a fulcrum. ,
The loading platform includes a bottom receiving portion that supports a bottom portion of the golf bag and a side receiving portion that supports a side portion of the golf bag, and the bottom receiving portion and the side receiving portion are centered in the vehicle width direction. A movable loading platform structure for a golf cart, characterized in that the golf carts are connected to each other via a rotating shaft arranged in alignment with each other in a rotatable state.   2. The golf cart according to claim 1, further comprising a restricting unit configured to restrict an angle between the bottom receiving portion and the side receiving portion to a predetermined angle when the bottom receiving portion rotates in a direction away from the side receiving portion. Movable platform structure.   The movable loading platform structure of the golf cart according to claim 2, wherein the restricting means is configured by an abutting member provided on at least one of the bottom receiving portion and the side receiving portion. The fulcrum is provided at one end portion of the side receiving portion, and the rotation shaft is provided at a portion separated from the one end portion of the side receiving portion by a predetermined distance, and the bottom receiving portion side portion and the side receiving portion in the regulating means The movable loading platform structure of the golf cart according to claim 3, wherein a contact position with a side portion is positioned between the fulcrum and the rotating shaft.

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