JP2001219880A - Sitting seat of motorcycle having movable backrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sitting seat for a motorcycle having a movable backrest capable of easily adjusting the backrest of the motorcycle to an optimal position for a rider. SOLUTION: In this sitting seat S of the motorcycle having a sitting part 10 and the movable backrest 20 above the sitting part 10, a slit is formed in a bottom plate 21 of the movable backrest 20. A hole is formed in a bottom plate 13 of the sitting part 10 of a position fitted to this slit, and is slidably arranged in the slit arranged in the bottom plate 21 of the movable backrest 20. The movable backrest 20 and the sitting part 10 are connected by a guiding and connecting member 31 penetrating through the hole arranged in the bottom plate 13 of the sitting part 10 and a fixing means 33 for fixing the guiding and connecting member 31. The movable backrest 20 can be moved to the sitting part 10 by releasing the fixing means 33. The movable backrest 20 is fixed to the sitting part 10 by performing a fixation by the fixing means 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle seat having a movable backrest, and more particularly to a motorcycle having a movable backrest which can be suitably positioned by a driver. The present invention relates to a seat for a motorcycle.

[0002]

2. Description of the Related Art Conventionally, a motorcycle seat has been provided with a driver's seat and a passenger's seat in order to generate low back pain and fatigue during long-time driving and to ensure the safety of a riding position. There is known a seat having a backrest for applying pressure (hold feeling) to a driver's waist portion.

[0003] In order to apply an optimal pressure to the driver's waist portion and obtain a more comfortable ride by the backrest, the backrest is configured to be adjustable according to the occupant's physique and height. It is desirable.

[0004]

For this reason, a configuration is known in which a slide mechanism is provided between the backrest and the seating portion, and the backrest is positioned at a predetermined position (Japanese Patent Laid-Open No. 9-1944). reference). But in this case,
After the backrest is moved to the predetermined position, the backrest may be moved when the driver actually rides on the motorcycle to check the position of the backrest or when fixing the backrest at the predetermined position. There is a problem in that it moves and cannot be positioned at an accurate position. In some cases, it was time-consuming to redo work.

Further, in the above-mentioned conventional technique, it is necessary to attach another member such as an attachment stay to the frame plate of the backrest, and there is a problem that the number of parts and the number of assembling steps increase.

[0006] Alternatively, there is a method in which movable backrests of each size are optionally prepared and selected according to the occupant's physique and height. However, there is a problem that it is necessary to cope with various sizes and the cost increases. In addition, when another driver gets on the vehicle, there is a disadvantage that the movable backrest must be replaced.

An object of the present invention is to provide a motorcycle seat having a movable backrest, which can easily adjust the backrest of the motorcycle to an optimum position for the driver. .

[0008]

According to the present invention, there is provided a motorcycle seat having a movable backrest according to the present invention, wherein the motorcycle includes a seating portion and a movable backrest above the seating portion. In the seat, the bottom plate of the movable backrest has a slit formed therein, and a hole is formed in the bottom plate of the seating portion at a position corresponding to the slit, and a slit is provided in the bottom plate of the movable backrest. The movable backrest and the seating portion are arranged by a guide / connection member that is slidably disposed and penetrates a hole provided in the bottom plate of the seating portion, and a fixing unit that fixes the guide / connection member. The movable backrest is connected to the seat by releasing the fixing means, and is fixed by the fixing means. It said movable backrest is fixed to the seat by is solved by.

As described above, according to the motorcycle seat having the movable backrest of the present invention, the seating portion and the movable backrest are previously connected to the guide / connection member via the fixing means. When the fixing means is loosened and the movable backrest can be separated from the seating part, the slit on the movable backrest side is slid with respect to the guide / connection member fixed to the seating part side. Thereby, the movable backrest can be slid to a predetermined position. When the movable backrest has moved to a desired position, the movable backrest is fixed again by the fixing means. Thus, according to the seating seat of the present invention,
Anyone can easily move and position the movable backrest without using a special tool or the like.

[0010] If a spring member is provided between the guide and connecting member and the bottom plate of the movable backrest or the bottom plate of the seating portion, the movable back can be moved even when the fixing means is released. Since the rest is pressed toward the seat, the movable backrest can be moved while making fine adjustments.

The bottom plate of the movable backrest has a concave portion or a convex portion formed in association with the slit, and the bottom plate of the seating portion has a convex portion engageable with the concave portion or the convex portion. Or a recess is formed, and the movable backrest releases the fixing means,
The concave or convex portion formed on the bottom plate of the movable backrest and the convex or concave portion formed on the bottom plate of the seat are engaged or disengaged, and the spring member expands and contracts, with respect to the seat. It is possible to move with a click feeling.

More specifically, the guide / connection member is a screw member, and the fixing means is a nut. As described above, in the seat according to the present embodiment, the movable backrest and the seat are connected by the pair of screw members and the nuts, and the cost can be reduced by reducing the number of parts. Also, the assembling can be easily performed.

It is preferable that the concave portion or the convex portion is formed in a substantially hemispherical shape so that the concave portion and the convex portion can be smoothly engaged and disengaged. Further, by integrally forming the concave portion or the convex portion with the bottom plate of the movable backrest or the bottom plate of the seating portion, it is possible to reduce the number of parts and improve manufacturing efficiency.

[0014] It is preferable that the seating seat is provided with a slide guide mechanism for guiding the sliding of the movable backrest. This slide guide mechanism
More specifically, a first convex portion provided on the movable backrest side or the seating portion side, and a first convex portion provided on the seating portion side or the movable backrest side, And an engageable groove.

By providing such a slide guide mechanism, when the movable backrest is slid,
It is possible to prevent poor sliding such as inclination of the connecting member serving as a guide and the movable backrest, and to allow stable sliding.

Further, the slide guide mechanism may be configured such that a bracket is attached to the guide / connection member. The bracket has at least a hole slidable in the longitudinal direction of the leg of the guide / connection member, and a surface slidable on the bottom plate of the movable backrest. By attaching this bracket, it is possible to more effectively prevent poor sliding of the guide / connection member in the slit.

Further, as the slide guide mechanism, a second convex portion may be formed along the slit of the movable backrest. The second ridge portion is configured to slidably contact the guide / connection member and hold the guide / connection member.

Further, as a slide guide mechanism,
A bracket may be attached to the guide / connection member, and a second ridge may be formed along the slit of the movable backrest and slidably contact the bracket.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A motorcycle seat S of a motorcycle according to the present invention is provided with a seat 10 and a movable backrest 20 above the seat 10. The bottom plate 21 of the movable backrest 20 has a slit 21a and a concave portion 21b formed in association with the slit 21a.

The bottom plate 13 of the seat 10 has a hole 16a formed at a position aligned with the slit 21a, and a projection 16b which can be engaged with the recess 21b.
The movable backrest 20 and the seating section 10 are connected via a screw member 31 as a guide / connection member, a spring member 32, and a wing nut 33 as fixing means.

The screw member 31 is slidably provided in a slit 21 a provided in the bottom plate 21 of the movable backrest 20, and is provided so as to pass through a hole 16 a provided in the bottom plate 13 of the seating portion 10. Has been established.

The spring member 32 includes a head 31 of the screw member 31.
a and the bottom plate 21 of the movable backrest 20. The wing nut 33 is connected to the leg 3 of the screw member 31.
1b.

In the movable backrest 20 of this embodiment, the movable backrest 20 and the seating portion 10 can be separated from each other by loosening the wing nut 33,
A concave portion 21b formed on the bottom plate 21 of the seating portion and a convex portion 16b formed on the bottom plate 13 of the seating portion 10 are engaged or disengaged,
The spring member 32 expands and contracts, so that the movable backrest 20 can move with a click feeling with respect to the seating portion 10.

When the movable backrest 20 is moved to a desired position, the movable backrest 20 is fixed to the seat 10 by tightening the wing nut 33.

In this embodiment, the concave portion 21b and the convex portion 16b are
Since it is formed in a substantially hemispherical shape, the concave portion 21b and the convex portion 1
6b is smoothly engaged and disengaged. Further, since the concave portion 21b and the convex portion 16b are formed integrally with the bottom plate 21 of the movable backrest 20 and the bottom plate 13 of the seating portion 10, it is possible to reduce the number of parts and improve the manufacturing efficiency. .

The seat S of this embodiment has, as a slide guide mechanism, a first ridge 16c provided on the seat 10 side and a first ridge provided on the movable backrest 20 side. And a groove 21c that can be engaged with the ridge 16c. With the slide guide mechanism, when the movable backrest 20 is slid, poor sliding such as the screw member 31 or the movable backrest 20 being inclined can be prevented, and the movable backrest 20 can be slid steadily. .

The slide guide mechanism may have a structure in which a bracket 36 is attached to the screw member 31. The bracket 36 has a hole 36a slidable in the longitudinal direction of the leg 31b of the screw member 31, and a surface 36b slidable on the bottom plate 21 of the movable backrest 20. Further, the inner wall of the bracket 36 is
Is configured so as to slidably abut the head 31a. By attaching the bracket 36, the inclination of the screw member 31 at the time of sliding the movable backrest can be prevented, and the sliding failure of the screw member 31 in the slit 21a can be more effectively prevented.

As another configuration of the slide guide mechanism, a bracket 36 is attached to the screw member 31, and the second ridge 21 d slidably abutting the bracket 36 is formed by a slit in the movable backrest 20. It may be formed along 21a.

[0029]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

FIGS. 1 to 14 show a seat for a motorcycle according to the present invention. FIG. 1 is an explanatory view showing a seating portion, FIG. 2 is an explanatory view showing a movable backrest, and FIG. FIG. 4 is a cross-sectional view showing a seat portion and a main part of the movable backrest when the movable backrest is fixed, and FIGS. 5 to 7 are seat portions and a movable back when the movable backrest is moved. FIG. 8 is a cross-sectional view showing a main part of the rest.
Is a cross-sectional view showing a concave portion and a convex portion when the movable backrest moves, and FIGS. 9 to 14 are perspective views showing members used when connecting the movable backrest and the seating portion.

As shown in FIG. 3, the seat S of the motorcycle according to the present invention includes a seat 10 and a movable backrest 20 located above the seat 10. It is arranged so as to be located between the driver's seat 11 and the passenger's seat 12. In addition, the seat S is not limited to the two-seater type as shown in this example,
It may be a seating seat for one person. in this case,
The movable backrest is located behind the seat.

As shown in FIG. 1, the seat 10 is
3, a cushion material 15 provided on the bottom plate 13, and a skin material 14 covering the cushion material 15.

The seating portion 10 has a backrest arranging portion 16 without the cushioning material 15 formed between the driver's seating portion 11 and the passenger's seating portion 12. The backrest arranging part 16 is provided with the bottom plate 21 of the movable backrest 20.
Are formed in such a size that can be arranged.

As shown in FIG. 1, a hole 16a, a convex portion 16b, and a convex ridge portion 16c are formed in the backrest arranging portion 16. The hole 16 a is for disposing a screw member 31 that connects the seating portion 10 and the movable backrest 20.

The convex portion 16b is formed in a substantially hemispherical shape, and has a concave portion 21b formed on the movable backrest 20 described later.
The movable backrest 20 is provided for engaging and disengaging the movable backrest 20 to fix the movable backrest 20 at a predetermined position, and to provide a click feeling when the movable backrest 20 is slid.

In this embodiment, the bottom plate 13 of the seat 10
Alternatively, at least the backrest arranging portion 16 is made of resin, and the convex portion 16b is formed integrally. With such a configuration, it is possible to reduce the number of parts and to improve manufacturing efficiency.

The protruding ridge 16c is engaged with a groove formed on the movable backrest 20, which will be described later, and constitutes a slide guide mechanism for sliding the movable backrest 20. In the present example, this ridge 16c is also
It is formed integrally with the backrest disposition portion 16.

As shown in FIG. 2, the movable backrest 20 includes a bottom plate 21, a cushion material 23 provided on the bottom plate 21, and a skin material 22 covering the cushion material 23.

The bottom plate 21 of the movable backrest 20 has slits 21a formed at positions matching the holes 16a of the backrest disposition portion 16 of the seating portion 10, and slits 21a formed on the backrest disposition portion 16 of the seating portion 10. A concave portion 21b that can be engaged with the formed convex portion 16b is provided.

As a slide guide mechanism for sliding the movable backrest 20, there is provided a groove 21c which can be engaged with a ridge 16c formed on the backrest disposition portion 16 of the seating portion 10.

In the seat S of this embodiment, when the movable backrest 20 is slid, as will be described later,
The movable backrest 20 moves while being lifted from the seating section 10, but the ridge 16 as a slide guide mechanism is moved.
c and the groove 21c are thus movable backrest 20
Is configured such that the ridge 16c can be engaged with the groove 21c even when is lifted from the seating portion 10.

The seating section 10 and the movable backrest 20 are detachably connected by a screw member 31, a spring member 32, and a wing nut 33. As shown in FIG. 9, the screw member 31 includes a head 31 a and a leg 31 b, and is slidably disposed in a slit 21 a formed in the bottom plate 21 of the movable backrest 20. Part 1
The bottom plate 16 is formed so as to pass through a hole 16a formed in the bottom plate 16.

The spring member 32 is a compression coil spring as shown in FIG. 10, and is configured to be compressed by applying a force from above and below. The spring member 32 is disposed between the head 31a of the screw member 31 and the bottom plate 21 of the movable backrest 20, as shown in FIG.

In this embodiment, in order to prevent the sliding failure of the screw member 31 in the slit 21a, the screw member 3
1, a bracket 36 as a slide guide mechanism is attached. Accordingly, in this example, the spring member 32 is, as shown in FIG.
a and the surface 36 a of the bracket 36.

As described above, the bracket 36 has the surface 36a with which the spring member 32 abuts, and also has the hole 3 which is slidably engaged with the leg 31b of the screw member 31 in the longitudinal direction.
6b. In this example, the head 31a of the screw member 31 slidably abuts the inner wall of the bracket 36 so that the screw member 31 is securely held.
As shown in FIG. 14, a cylindrical portion is provided on the bracket 36, and a hole 36b is formed in the cylindrical portion so as to securely hold the leg portion 31b.

A wing nut 33 shown in FIG. 11 is attached to the end of the leg 31b of the screw member 31. Thus, the wing nut 33 is attached to the end of the leg 31b of the screw member 31, and the wing nut 33 is tightened so that the seating portion 10 and the movable backrest 20 are connected. . In the case where the bottom plate 13 of the seating portion 10 is formed of resin as in this example, the wing nut 33 is used.
In order to prevent the bottom plate 13 from being distorted by attaching the washer, it is preferable to attach washers 34 and 35 as shown in FIGS. 12 and 13 to the hole 16a.

The seat S of this embodiment has the above-described structure.
The movable backrest 20 can be slid with respect to the seating portion 10 so that the movable backrest 20 can be located at an optimum location for the driver. Hereinafter, the positioning operation of the movable backrest in the present example will be described.

As shown in FIGS. 4 and 5, the movable backrest 20 is fixed to the seat 10. And FIG.
By loosening the wing nut 33, the movable backrest 20 can be separated from the seat 10 as shown in FIG.

Next, the seating surface of the movable backrest 20 or the like is held by hand, and the movable backrest 20 is moved by applying a force in the desired direction. The movable backrest 20
The bottom plate 21 of the movable backrest 20 corresponds to the screw member 31 fixed to the backrest arranging portion 16 on the seating portion 10 side.
When the slit 21a provided on the seat 10 slides, it moves above the seating portion 10.

In this embodiment, the convex portion 16b is provided on the backrest arranging portion 16 on the side of the seating portion 10, and the movable backrest 2 is provided.
A concave portion 21b engageable with the convex portion 16b is formed on the bottom plate 21 on the 0 side.
Is provided, and by loosening the wing nut 33,
Since the movable backrest 20 and the seating section 10 can be separated from each other, when the driver tries to slide the movable backrest 20, as shown in FIGS.
Is detached from the recess 21b.

When the convex portion 16b is detached from the concave portion 21b and the convex portion 16b comes into contact with the bottom plate 21 of the movable backrest 20, the movable backrest 20 rises from the seating portion 20 while the spring member 32 is compressed. When the movable backrest 20 is further moved, the convex portion 16
The movable backrest 20 slides while b slides on the bottom plate 21.

In this manner, the movable backrest 20 is slid until the position becomes suitable for the driver. In the seat S of the present example, when the movable backrest 20 is slid while the spring member 32 is compressed, the convex portion 16b on the seating portion 10 side is moved by the movable backrest 2.
The movable backrest 20 can be slid with a click feeling because it engages with or disengages from the recess 21b on the zero side.

In the seat S of this embodiment, the bracket 36 and the seat 10 side as a slide guide mechanism for preventing the movable backrest 20 from sliding poorly when the movable backrest 20 is slid. Are provided, and the groove 21c provided on the side of the movable backrest 20 is provided, so that the movable backrest 20 can be slid properly without tilting when sliding. is there.

When the movable backrest 20 is moved to a position suitable for the driver, the convex portion 16b and the concave portion 21b are engaged with each other, and the wing nut 33 is tightened. Fixed.

In this manner, the movable backrest 20
Is fixed at an optimal position for the driver. Note that the movable backrest 20 of this example has a slidable width and is disposed so as to overlap with the driver's seating portion 11 and the passenger's seating portion 12, so that the movable backrest 20 slides as much as possible. Even if it does, a gap is not generated between the passenger seat portion 12 and the appearance is preferable.

In the above embodiment, the convex portion 16b is provided on the seating portion 10 side, and the concave portion 21b is provided on the movable backrest 20 side.
However, conversely, a configuration in which a concave portion is provided on the seating portion side and a convex portion is provided on the movable backrest side may be adopted.

Also, an example is shown in which a bracket 36 as shown in FIG. 14 is used as a slide guide mechanism for stably sliding the screw member 31, but the present invention is not limited to this, and the leg 31b of the screw member 31 is not limited to this. A plate having a hole slidable in the longitudinal direction is provided, and a ridge having a claw for holding the plate is provided on both sides of the slit 21a, and the plate is held while being held by the claw. Bottom plate 21
, And may guide the screw member 31.

Alternatively, as shown in FIG. 15, a structure using a bracket 37 having holes 37a and 37b on the top and bottom surfaces may be used. When this bracket 37 is used, the bracket 37 is attached to the head 31a of the screw member 31.
A manually operable guide bar 31c is provided in the hole 37a on the upper surface,
By engaging the guide bar 31c with the hole 37a, the movable backrest 20 can be slid while holding the screw member 31, as shown in FIGS.

Alternatively, as shown in FIG. 19, as the slide guide mechanism, the bottom plate 21 of the movable backrest 20
It is also possible to form a convex ridge 21d as a second convex ridge, and to slide the bracket 36 along the convex ridge 21d.

Further, in the above-described embodiment, an example has been described in which the screw member 31 is used as the guide / connecting member and the wing nut 33 is used as the fixing means. However, the present invention is not limited to this, and as shown in FIG. May be a bolt member 38 provided with no screw, and the fixing means may be a projecting portion 38a projecting from a predetermined position of the bolt member 38. In this case, the hole 16a of the bottom plate 13 of the seating portion 10 is formed in a keyhole shape as shown in FIG.
By turning the knob 38b, the projecting portion 38a is fixed or released in the hole 16a by the elastic force of the spring member 32.

With the above configuration, the bolt member 38 can be released with one touch, or the movable backrest 20 and the seat portion 10 can be fixed with one touch.

When a bolt member 38 having no screw is used as the guide / connection member and the fixing means is a protrusion 38a projecting from a predetermined position of the bolt member 38, the knob 38b is turned to project the protrusion. Can be fixed or the fixing can be released. Therefore, as shown in FIG. 22, a configuration in which a spring member 32 is provided on the seating portion 10 side can also be adopted.

In the embodiment shown in FIG. 22, the bracket 36 is provided with the seat portion 10 so as to prevent the bolt member 38 from falling off when the bolt member 38 is released.
Side hole 16a.

Further, as a structure for giving a click feeling when the movable backrest 20 is slid, a structure in which a substantially hemispherical uneven portion is formed on the bottom plate of the movable backrest 20 and the bottom plate of the seating portion is shown. However, the present invention is not limited thereto, and the bottom plate of the movable backrest 20 and the bottom plate of the seating portion may be formed in a stepped shape, or may be formed as a continuous uneven portion having a triangular cross section.

As described above, the seat of the motorcycle provided with the movable backrest according to the present invention is not limited to the configuration described in the above embodiment, but includes a configuration using parts of other shapes.

[0066]

As described above, according to the motorcycle seat having the movable backrest of the present invention, anyone can easily move and position the movable backrest without using a special tool or the like. It is possible to

When the movable backrest is slid, the concave or convex portion formed on the movable backrest side and the convex or concave portion formed on the seating side slide while repeating engagement and disengagement. Therefore, the movable backrest can be slid with a click feeling by the movement of these concave and convex portions, and can be adjusted while confirming an appropriate position.

Further, in the seat according to the present embodiment, the movable backrest and the seat are connected by a single connecting member, so that the cost can be reduced by reducing the number of parts. Also, the assembling can be easily performed.

It is preferable that the concave portion or the convex portion is formed in a substantially hemispherical shape, because the concave portion and the convex portion can be smoothly engaged and disengaged. Further, by integrally forming the concave portion or the convex portion with the bottom plate of the movable backrest or the bottom plate of the seating portion, it is possible to reduce the number of parts and improve manufacturing efficiency.

As described above, the seat of the motorcycle of the present invention is configured so that the movable backrest can be slid and fixed at an optimum position, so that the movable seat can be moved according to the physique of the driver or the passenger. The position of the backrest can be adjusted, so that more comfortable traveling can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a seat portion of a seat according to the present invention.

FIG. 2 is an explanatory view showing a movable backrest of the seat according to the present invention.

FIG. 3 is a side sectional view of a seat.

FIG. 4 is a cross-sectional view illustrating a seating portion and a main part of the movable backrest when the movable backrest is fixed.

FIG. 5 is a cross-sectional view illustrating a main part of the seating portion and the movable backrest when the movable backrest is fixed.

FIG. 6 is a cross-sectional view illustrating a main part of the seating portion and the movable backrest when the movable backrest is moved.

FIG. 7 is a cross-sectional view illustrating a main part of the seating portion and the movable backrest when the movable backrest is moved.

FIG. 8 is a sectional view showing a concave portion and a convex portion when the movable backrest is moved.

FIG. 9 is a perspective view showing a screw member.

FIG. 10 is a perspective view showing a spring member.

FIG. 11 is a perspective view showing a wing nut.

FIG. 12 is a perspective view showing a washer.

FIG. 13 is a perspective view showing a washer.

FIG. 14 is a perspective view showing a bracket as a slide guide mechanism.

FIG. 15 is an explanatory diagram showing another configuration of the bracket as the slide guide mechanism.

FIG. 16 shows a case where the bracket shown in FIG. 15 is used.
It is sectional drawing which shows the seat part at the time of fixing a movable backrest, and the principal part of a movable backrest.

FIG. 17 shows a state in which the bracket shown in FIG. 15 is used.
It is sectional drawing which shows the seating part at the time of a movable backrest movement, and the principal part of a movable backrest.

FIG. 18 shows a case where the bracket shown in FIG. 15 is used.
It is sectional drawing which shows the seating part at the time of a movable backrest movement, and the principal part of a movable backrest.

FIG. 19 is an explanatory diagram showing another configuration of the slide guide mechanism.

FIG. 20 is an explanatory view showing another configuration of the guide / connection member and the fixing means.

FIG. 21 is an explanatory view showing an example of the shape of a hole in a seat when the guide / connection member and fixing means shown in FIG. 20 are used.

FIG. 22 is an explanatory diagram showing another configuration of the guide / connection member and the fixing means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Seating part 11 Driver's seating part 12 Passenger's seating part 13 Bottom plate 14 Skin material 15 Cushion material 16 Backrest arranging part 16a Hole 16b Convex part 16c Convex part (first convex part) 20 Movable backrest Reference Signs List 21 bottom plate 21a slit 21b recess 21c groove 21d convex ridge (second convex ridge) 22 skin material 23 cushion material 31 screw member 32 spring member 33 wing nut 34, 35 washer 36 bracket 37 bracket 38 bolt member 38a projecting portion 38b Knob S Seating seat

Claims (10)

[Claims] 1. A seat for a motorcycle provided with a seating portion and a movable backrest above the seating portion, wherein a slit is formed in a bottom plate of the movable backrest, and a slit is formed at a position matching the slit. A hole is formed in the bottom plate of the seating portion, and a guide / connection member that is slidably disposed in a slit provided in the bottom plate of the movable backrest and penetrates a hole provided in the bottom plate of the seating portion. The movable backrest and the seating portion are connected by fixing means for fixing the guide / connection member, and the movable backrest is movable with respect to the seating portion by releasing the fixing means. The movable backrest is fixed to the seat by being fixed by the fixing means. Dynamic motorcycle sitting seat of. 2. The seat according to claim 1, wherein a spring member is provided between the guide and connection member and a bottom plate of the movable backrest or a bottom plate of the seat portion. 3. The bottom plate of the movable backrest has a concave portion or a convex portion formed in association with the slit, and the bottom plate of the seating portion has a convex portion engageable with the concave portion or the convex portion. Or a concave portion is formed, wherein the movable backrest is formed by releasing the fixing means, thereby forming a concave portion or a convex portion formed on the bottom plate of the movable backrest, and a convex portion or a concave portion formed on the bottom plate of the seating portion. 3. The seat according to claim 2, wherein the seat member is engaged or disengaged, and the spring member expands and contracts, and is movable with a click feeling with respect to the seat portion. 4. 4. The seat according to claim 1, wherein the guide / connection member is a screw member, and the fixing means is a nut. 5. The seat according to claim 3, wherein the concave portion or the convex portion is formed in a substantially hemispherical shape. 6. The motorcycle seat having a movable backrest according to claim 3, wherein the concave portion or the convex portion is formed integrally with a bottom plate of the movable backrest or a bottom plate of the seat portion. Sheet. 7. The movable backrest and the seating portion are provided with a slide guide mechanism for guiding the movement of the movable backrest, and the slide guide mechanism is provided on the movable backrest side or the seating portion side. The first convex ridge portion provided on the seating portion side or the movable backrest side, and a groove portion engageable with the first convex ridge portion. A motorcycle seat with a movable backrest. 8. The movable backrest and the seating portion are provided with a slide guide mechanism for guiding the movement of the movable backrest, and the slide guide mechanism is provided at least in a longitudinal direction of a leg of the guide / connection member. The movable backrest according to claim 1, wherein the movable backrest has a slidable hole and a surface slidable on a bottom plate of the movable backrest, and is a bracket attached to the guide / connection member. Motorcycle seat equipped with. 9. The movable backrest and the seating section are provided with a slide guide mechanism for guiding the movement of the movable backrest, and the slide guide mechanism is formed along a slit of the movable backrest. The seat according to claim 1, further comprising a second protruding ridge slidably in contact with the guide / connection member. 10. The movable backrest and the seating portion are provided with a slide guide mechanism for guiding the movement of the movable backrest, and the slide guide mechanism slides at least on a leg of the guide / connection member. A movable hole, a bracket having a surface slidable on the bottom plate of the movable backrest and attached to the guide / connection member, and formed along a slit of the movable backrest, with respect to the bracket. The seat according to claim 1, further comprising a second ridge that is slidably abutted on the motorcycle.