JPH0325088A - Backrest position adjusting device for motorcycle - Google Patents

Abstract

PURPOSE:To increase/decrease the relative distance to a steering handle largely by providing plural individual controlling chambers, expanded uniformly in thickness by the injection of high-pressure air so as to be of flat balloon shape, overlappingly between a backrest main body and a fitting base, thus increasing/ decreasing the thickness of a backrest uniformly. CONSTITUTION:When high-pressure air is supplied to controlling chambers 14a-14c, rubber tubes 15 are expanded to the set outer diameter, and a backrest main body 8a is displaced forward by the enlarged thickness. When the air is let out, the controlling chambers 14a-14c are contracted to return to the original thickness, and the front face of the backrest main body 8a recedes by that contracted thickness. The supply of the high-pressure air is performed selectively by the control of a switching valve 18, and the backrest main body 8a advances stepwise by double the number of the air-supplied controlling chambers and recedes stepwise by double the number of the air-let-out controlling chambers. The distance to a steering handle can be thus adjusted by the forward/backward adjustment of the backrest main body 8a, thus obtaining a comfortable riding position.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) This invention is a method for adjusting the backrest position of a two-wheeled vehicle by moving the backrest 1 back and forth according to the physique of the rider. Regarding equipment.

(Prior Art) Some motorcycles are equipped with a backrest at the rear end of the seat 1- to support the back so that the rider can take a relaxed riding posture. For example, as shown in Figure 6,
This is a scooter-type two-wheeled motor vehicle with a roof, in which the height of the seat b is relatively low in order to install the roof a, and it is inevitably required to be equipped with a backrest C.

For rider d who rides such a 11J two-wheeled vehicle,
If the seat b and the backrest C are fixed, the riding posture may become uncomfortable due to differences in physique. Differences in leg length can be dealt with by bending the tip of the foot r attached to the step board e to 111 degrees and changing the bending angle α of the knee 9, so there is no problem with the fixed seat b.

However, it is difficult to match the distance #L from the handle 1 to the backrest C due to the difference in the length of the arm h. If the length of the arm h is shorter than the length, the back will be separated from the backrest C,
This is the kind of car that I designed with the aim of creating a relaxed riding posture, with the Pack Rest C functioning as a waist rest! The result is likely to be that the quality of the 712-wheeled vehicle is halved. Therefore handle 1
It is desired that the backrest C be able to adjust its position forward and backward, but adjusting the handle position requires a complicated structure and increases costs for safety reasons, so adjustment on the backrest side is appropriate.

Conventionally, in automobiles, etc., by providing a seat rail on the seat bottom plate and sliding the entire seat, the above LVF! It has become common to adjust the distance. However, this type of structure is difficult to use for the seat of a motorcycle or two-wheeled vehicle.Not only do the rails, locking devices, levers, etc. It tends to get in the way of motorcycle riders.

Also, when backrest C is moved backwards along with seat b,
A gap is created between it and the helmet storage box j, etc. behind it, and this is exposed in a VJ two-wheeled vehicle, which impairs the appearance and increases costs if concealed.

On the other hand, Japanese Unexamined Patent Publication No. 60-33175 discloses a device in which the waist rest is expanded by injecting air.

This is suitable for comfortably adjusting the feeling of pressure on the lower back, but since the amount of adjustment is small and it expands into a spherical shape, it is not suitable for adjusting the position of a backrest that requires a large amount of adjustment.

(Problems to be Solved by the Invention) This invention was made in view of the above-mentioned problems, and provides a method for uniformly increasing or decreasing the thickness of a backrest while keeping the seat and backrest mounting board fixed. Accordingly, an object of the present invention is to provide a backrest position adjustment device for a two-wheeled motor vehicle, which allows the front surface of the backrest to be moved forward and backward by a large distance with respect to the handlebar.

(Structure of the Invention) (Means for Solving the Problems) In order to achieve the above object, the backrest position adjustment device for a motorcycle of the present invention includes a backrest 1 arranged at the rear end of the seat. In a motorcycle, a plurality of overlapping independent adjustment chambers are interposed between the backrest main body and its mounting board, and the thickness uniformly increases by injecting high-pressure air into a flat balloon shape. The configuration is such that the supply and discharge of air can be selectively controlled for each chamber by means of high-pressure air injection pipes connected to each adjustment chamber.

(Function) With this structure, each adjustment chamber increases a predetermined thickness by supplying high-pressure air and pushes the backrest body forward.By selecting the number of adjustment chambers to which air is supplied, the number can be adjusted. The amount of thrust increases in proportion to the amount, and the front of the backrest moves forward in stages relative to the handle.

When the air is removed, the adjustment chamber will shrink and return to its original thickness, and the backless 1/front will recede accordingly. In this case, the pressure on the rider's back will restore it completely.

In this way, the position of the backrest is adjusted according to the rider's physique, especially the length of the arms, and an optimal riding posture can be created.

Furthermore, since the adjustment does not change the shape of the front surface of the backrest, that is, the seat surface, the function as a backrest is stable, and the adjustment chamber functions as a cushion.

<Embodiment> FIG. 1 is a side view of a seat with a backrest for a two-wheeled motor vehicle according to an embodiment of the present invention.

The seat 1 consists of a bottom plate 2, a cushion 3, and a cover seat 4. The seat 1 is pivoted by a hinge 5 at the front end of the bottom plate 2, and is attached to the upper surface of a body cover 6 so that it can be opened forward and upward. Ru. 7 is a rubber collar.

The bottom plate 2 extends upward from the rear end and becomes a mounting board 9 for the backrest 8. The mounting board 9 closes the front opening of the helmet storage box 10 etc. rearranged, and is designed to fall forward together with the seat 1 to open the opening. 7a is a rubber band 1 provided on the mounting board 9.

The backrest 8 is composed of a backrest main rest 8a and an adjustment section 8b interposed behind it.

The backrest main body 8a includes a back plate 11, a cushion 12.
The adjustment section 8b is composed of an outer covering sheet 13, and has a plurality of flat adjustment chambers 14a whose thickness increases due to the injection of high-pressure air.
14b. 14c are stacked and connected in a stacked state, and support the backrest main body on the mounting board 9.

As shown in FIGS. 2, 3, and 4, each of the adjustment chambers 14a, 14b, and 14c is formed in the shape of a flat plate, with rubber tubes 15 arranged in a lattice pattern communicating with each other. Each adjustment chamber 14a. The insides of 14b and 14C are independent, and air inlets 16a, ieb, and 16c are connected to them, respectively.
Further, air supply pipes 17a, 1 connected to a high pressure air source
7b and 17G are connected.

When high-pressure air is supplied to the adjustment chambers 14a, 14b, and 14c, the rubber tube 15 expands to a set outer diameter, and the entire chamber uniformly has the same thickness as the outer diameter. follow-
Then, the backrest main body 8a is displaced forward by the increased thickness. If the air is removed, the adjustment chambers 14a, 14b, 1
4c shrinks and returns to its original thickness, and the front surface of the backrest main rest 8a recedes accordingly.

The supply of high-pressure air is selectively performed by controlling the opening/closing valve 18, and the backrest main body 8a moves forward in stages by a multiple of the number of adjustment chambers that have received the supply, and the number of adjustment chambers from which air has been removed is Step-by-step retreat by multiples of .

In this way, by adjusting the backrest main body 8a forward and backward, the distance between the backrest body 8a and the handlebars is adjusted, and the optimal riding posture can be taken according to the rider's physique and arm length.

High-pressure air can be easily supplied and adjusted using a portable air bomb, a high-pressure air source installed at a gas station, or a small high-pressure air tank installed inside the vehicle, and since the main component is a rubber vibrator, the structure is fl! Simple, lightweight and low cost. In addition, there are no hard protrusions, making it highly safe, and the adjustment chamber acts as a cushion, further improving the functionality of the backrest.

FIG. 5 shows another embodiment of the invention, in which a rubber vibrator 15
are arranged closely in parallel in the horizontal direction in each lecture room 14a, 14b. 14
c, the backrest position ff can be easily adjusted using high-pressure air like the above-mentioned one, and the back plate can be omitted from the backrest body. The arrangement of the rubber pipes 15 is the same in the vertical direction.

〔Effect of the invention〕

As described above, the backrest position adjustment device for a motorcycle according to the present invention is used in a motorcycle city where the backrest is arranged at the rear end of the seat, between the backrest main body and its mounting board. By injecting high-pressure air, the thickness uniformly expands into a flat balloon shape.In addition to intervening multiple independent adjustment chambers, each chamber can be selected using a high-pressure air injection pipe connected to each adjustment chamber. air supply,
It is designed to control the ejection, and the thickness of the backrest can be increased or decreased in stages to adjust the relative distance to the handlebars, which has the effect of optimizing the rider's riding posture according to their physique. .

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of a seat with a backrest showing an embodiment of the present invention, Fig. 2 is an enlarged longitudinal side view of section A in Fig. 1, and Fig. 3 is an enlarged longitudinal side view of section B in Fig. 1. Figure, 4th
The figures are a front view of the backrest shown in Fig. 1, Fig. 5 is a longitudinal side view of a seat with a backrest showing another embodiment of the present invention, and Fig. 6 is a front view of the backrest of the seat with a backrest. FIG. 2 is a partially longitudinal side view. 1... Seat, 8... Backrest, 8a... Packless]・Main body, 9... Backrest removal M board, 1
4a, 1, 4b, 14c...Adjustment chamber, 15...Rubber pipe, 1 6a. 1 6b, 1 6c...Air inlet, 17a, 17b, 17c...Air supply vibe.

Claims (1)

[Claims] In motorcycles with a backrest placed at the rear end of the seat, there is an independent balloon-shaped structure that uniformly increases in thickness by injecting high-pressure air between the backrest main body and its mounting board. A two-wheeled motor vehicle characterized in that a plurality of adjustment chambers are overlapped and the supply and discharge of air is selectively controlled for each chamber by means of a high-pressure air injection pipe connected to each adjustment chamber. backrest position adjustment device.