JP7778588B2 - Operation strap - Google Patents

Description

The present invention relates to an operating strap. More specifically, it relates to a band-shaped operating strap that is pulled out from a slit formed in the surface of a seat to the outside of the seat.

Patent Document 1 discloses an operating strap attached to a vehicle seat. This operating strap has a pull-out portion that is pulled out through a slit in the seat body, and a ring-shaped grip portion formed at the end of the pull-out portion. The operating strap also has an anti-entrapment portion that prevents the grip portion from getting caught in the slit.

The anti-entrapment section is formed by folding back the end of the seam that is wrapped around and sewn into the annular shape of the gripping section so that it overhangs the inside of the annular shape of the gripping section. This creates a thickened section that partially increases the thickness of the base of the gripping section, and functions to prevent the material from entering the slit by abutting against the periphery of the slit.

Japanese Patent Application Laid-Open No. 2021-17068

In the configuration described in Patent Document 1, the anti-entrapment portion extends into the annular interior of the grip portion, narrowing the annular interior, leaving room for improvement. Therefore, the present invention provides an operating strap that can prevent the grip portion from entering the slit using a rational configuration.

As a means for solving the above problems, the control strap of the present invention takes the following measures. Specifically, the first aspect of the present invention is a band-shaped control strap that is pulled out to the outside of the seat from a slit formed in the surface of the seat, and includes: a pull-out portion that is pulled out from the slit; a handle portion that extends in a folded manner from the end of the pull-out portion and is sewn to close the pull-out portion into a circular shape; an extension portion that forms a seam at the end of the circularly sewn handle portion, extends in the opposite direction from the handle portion, and overlaps with the pull-out portion in the pull-out direction; and a separation shape retainer that maintains at least a portion of the extension portion separated from the pull-out portion in the thickness direction.

According to the first invention, the extension portion, which is maintained at a distance from the pull-out portion in the thickness direction, prevents the grip portion from entering the slit by abutting against the sheet surface. In this way, a rational configuration that utilizes an innovative wrapping shape for the band-shaped operating strap makes it possible to prevent the grip portion from entering the slit.

The second aspect of the present invention is an operating strap according to the first aspect, wherein the spaced shape maintaining portion is comprised of a sewn portion that sews the grip portion into a ring shape, and the extended end of the extension portion is folded over and sewn together with the sewn portion, thereby maintaining the extension portion in a ring-shaped shape expanding in the thickness direction from the pull-out portion.

The second invention allows for the rationalization of the separation shape-retaining portion. Furthermore, because the extension portion maintains its shape by expanding annularly relative to the pull-out portion, the extension portion can more effectively prevent the grip portion from entering the slit.

The third aspect of the present invention is an operating strap according to the second aspect, in which the end of the extension portion is sandwiched between overlapping portions sewn together into a circular shape by the grip portion and sewn together by the spaced shape-retaining portion.

According to the third invention, the extension portion can be configured to have a good appearance without exposing the terminal to the outside.

A fourth aspect of the present invention is an operating strap according to any one of the first to third aspects, wherein the extension portion is held by the spaced shape retaining portion, thereby preventing the grip portion from collapsing due to bending of the pull-out portion by hitting the seat surface.

According to the fourth aspect of the invention, the extension portion can appropriately prevent both the grip portion from entering the slit and the grip portion from collapsing due to bending of the pull-out portion.

The fifth aspect of the present invention is an operating strap according to the fourth aspect, wherein the slit is formed so as to open upward on the upper surface of the seat back, and the operating strap serves as an operating member that, when pulled by the gripping portion, switches a foldable headrest connected to the seat back to a state in which it can be tilted forward on the seat, and the extension portion prevents the gripping portion from colliding with the seat surface when it is tilted forward, but allows the gripping portion to collapse backward without colliding with the seat surface.

According to the fifth aspect of the invention, by preventing the grip portion from tilting forward, the direction in which the grip portion tilts can always be directed toward the rear of the seat back. This makes it easier for the user to grasp and pull the grip portion from a position behind the seat back. Furthermore, if the seat back is designed to be able to tilt forward, the grip portion can be appropriately prevented from becoming pinched between the seat back and the seat cushion when the seat back is tilted forward.

FIG. 2 is a perspective view illustrating a configuration of an operation strap according to the first embodiment. 2 is a cross-sectional view taken along line II-II of FIG. 1. 10 is a cross-sectional view showing the process of passing the operating strap through the slit in the seat back to the outside of the seat. FIG. FIG. 10 is a cross-sectional view showing a state in which the grip portion is tilted toward the rear of the seat. 10 is a cross-sectional view showing a state in which the gripping portion is restricted from entering the slit. FIG. 10 is a cross-sectional view showing a state in which the extension portion is deformed due to the insertion of the drawn-out portion. FIG. FIG. 10 is a cross-sectional view showing a state in which the seat back is tilted forward. FIG. 10 is a cross-sectional view corresponding to FIG. 2 illustrating the configuration of an operating strap according to a second embodiment. FIG. 10 is a cross-sectional view corresponding to FIG. 2 illustrating the configuration of an operating strap according to a third embodiment. FIG. 10 is a cross-sectional view corresponding to FIG. 2 illustrating the configuration of an operating strap according to a fourth embodiment.

The following describes an embodiment of the present invention with reference to the accompanying drawings.

First Embodiment
(General configuration of operation strap 1)
First, the configuration of an operating strap 1 according to a first embodiment of the present invention will be described with reference to Figures 1 to 7. In the following description, when directions such as front, back, up, down, left, and right are indicated, they refer to the directions shown in each figure. In the following description, when a specific reference figure is not indicated or when a reference figure does not have a corresponding reference symbol, any of Figures 1 to 7 will be referenced as appropriate.

As shown in FIG. 1, the operating strap 1 according to this embodiment is configured as a band-shaped operating member attached to the upper part of the seat back SB of a rear seat in an automobile. Specifically, the operating strap 1 is pulled out toward the top of the seat from a horizontally elongated slit SL, which is an upward opening formed in the upper surface of the seat back SB. The slit SL is surrounded by a resin bezel BZ.

Operating strap 1 is made of a strip-shaped material woven from high-strength, long fibers such as polyester or nylon into a single, long strip with a constant width. Specifically, operating strap 1 is formed by folding back the single strip in several places and sewing it into a closed loop, resulting in a wound shape with a circular grip portion 4 and a circular extension portion 5.

Specifically, as shown in FIG. 2 , the operating strap 1 has a belt-shaped connection portion 2 that connects to an operating cable (not shown) inside the seat back SB. The operating strap 1 also has a belt-shaped pull-out portion 3 that extends flush upward from the connection portion 2 and is pulled out to the outside of the seat through a slit SL. The operating strap 1 also has a grip portion 4 that extends flush upward from the end of the pull-out portion 3, then folds back downward and forward as shown, and is sewn into a closed loop by a stitching portion 6.

The operating strap 1 also has an extension 5 that forms the seam at the end of the circularly sewn grip portion 4. The extension 5 extends downward from the stitching 6 in the opposite direction to the grip portion 4, as shown, and is configured to overlap with the pull-out portion 3 in the pull-out direction.

Extending portion 5 extends downward as shown, then folds back upward as shown, with the end of the extension portion sandwiched between overlapping portions 4A and 4B of the gripping portion 4, which are sewn together in the circular shape, and sewn together with these in the thickness direction at sewing portion 6. The sewing portion 6 is configured to sew together both overlapping portions 4A and 4B of the gripping portion 4 and the end of the extension portion 5 sandwiched between them using an outstitch, with the sewing thread visible from the front and back as shown.

As a result, the extension portion 5 is sewn onto the front surface of the drawer portion 3 to form a ring-shaped configuration aligned with the grip portion 4 in the vertical direction in the figure. In its free state, the extension portion 5 is configured to exert a restoring force that causes it to bulge forward from the drawer portion 3 in the figure, with the sewn portion 6 forming the closing portion of the ring-shaped configuration and the front surface of the drawer portion 3 facing rearward in the figure as fulcrums. Due to this bulge, the extension portion 5 forms a thick-diameter portion between itself and the drawer portion 3 that is wider in front-to-back than the slit SL.

Furthermore, the terminal at the end of the extension portion 5 is sewn in a state sandwiched between the overlapping portions 4A and 4B of the grip portion 4, resulting in a configuration that is attractive and does not expose the terminal to the outside. In this way, the operating strap 1 is configured such that the stitching portion 6 that closes the terminal at the end of the extension portion 5 into a ring shape serves as a spaced shape retaining portion H1 that keeps the extension portion 5 in a ring shape that expands forward in the thickness direction from the pull-out portion 3 as shown.

(Operation strap 1 assembly procedure)
The operating strap 1 having the above-described configuration is set in a state in which it is passed through the slit SL of the seat back SB from the seat interior side (lower side in the figure) to the seat exterior side (upper side in the figure) by the following procedure: First, an operating cable (not shown) is connected to the connection part 2 of the operating strap 1.

Next, as shown in Figure 3, the grip portion 4 of the operating strap 1 is passed through the slit SL from the inside of the seat (bottom in the figure) to the outside of the seat (top in the figure). Specifically, with the width direction of the operating strap 1 facing the horizontal direction of the slit SL, the operating strap 1 is passed through the slit SL from the inside of the seat (bottom in the figure) while squeezing the annular shape of the grip portion 4 from the upper end side of the grip portion 4.

As a result, after the grip portion 4 passes through the slit SL, the extension portion 5 is forced to contract in its annular shape against its restoring force and is passed through the slit SL together with the pull-out portion 3. Then, by passing the operating strap 1 through the slit SL until the extension portion 5 completely passes through the slit SL to the outside of the seat (upward in the illustration), the operating strap 1 is pulled out to its initial position before the operating cable (not shown) is pulled. This causes the extension portion 5 to return to its annular shape, bulging forward from the pull-out portion 3 as shown, due to its restoring force.

(Operation procedure for operation strap 1)
1, when the user grasps the grip portion 4 of the operating strap 1 assembled as described above by hand, pulled out from the slit SL in the seat back SB, and pulls it upward on the seat, the operating cable (not shown) connected inside the seat back SB is pulled. This releases a locking mechanism (not shown) connected to the operating cable (not shown), and the foldable headrest HR attached to the top of the seat back SB is unlocked from its locked state in the use position. This unlocking switches the headrest HR to a state in which it can be folded forward relative to the seat back SB.

Specifically, the user grasps the grip portion 4 of the operating strap 1 with their hand and pulls it upward on the seat from a position where they are standing behind the seat back SB with the vehicle's back door open. In this case, as shown in Figure 4, the operating strap 1 is always positioned so that the grip portion 4 is tilted from the top surface of the seat back SB toward the rear of the seat when the seat back SB is in the upright position where it is used as a backrest.

Specifically, as shown in Figure 2, when the operating strap 1 attempts to tilt forward on the seat with the base end of the pull-out portion 3 threaded through the slit SL as a fulcrum, the lower edge of the extension portion 5, which is lined up on the front side of the pull-out portion 3 in the figure, abuts against the bezel BZ or the top surface of the seat back SB, which forms the seat surface, preventing the operating strap 1 from tilting forward. Conversely, when the operating strap 1 attempts to tilt backward on the seat with the base end of the pull-out portion 3 threaded through the slit SL as a fulcrum, the extension portion 5 does not abut against the top surface of the bezel BZ or the seat back SB, as shown in Figure 4, allowing the operating strap 1 to tilt backward.

Therefore, the grip portion 4 of the operating strap 1 can always be tilted backward from the top surface of the seat back SB, allowing the user to easily grasp and pull the grip portion 4 from a position behind the seat back SB. Furthermore, as shown in Figure 5, even if a force is applied that would pull the pull-out portion 3 into the slit SL, the lower edge of the extension portion 5 of the operating strap 1 will abut against the bezel BZ or the top surface of the seat back SB, which forms the seat surface, preventing it from entering the slit SL.

More specifically, the operating strap 1 is designed to apply a strong retraction restricting force to prevent the grip portion 4 from being pulled into the slit SL, even if a strong retraction force is applied such that the pull-out portion 3 is pulled into the slit SL, accompanied by further deformation of the extension portion 5, after the lower edge of the extension portion 5 abuts against the upper surface of the bezel BZ or seat back SB. Specifically, as the pull-out portion 3 is pulled into the slit SL up to a point near the stitching 6, the starting point of deformation of the extension portion 5 is brought closer to the stitching 6.

As a result, the resistance to bending of the extension portion 5 gradually increases, and the force preventing it from entering the slit SL also gradually increases. Furthermore, as shown in Figure 6, when the pull-out portion 3 is pulled into the slit SL up to a point near the sewn portion 6, the extension portion 5 comes into contact with the periphery of the slit SL (bezel BZ) and bends upward on the sheet, with the sewn portion 6 as a fulcrum. As a result, the extension portion 5 overlaps the three band portions sewn together at the sewn portion 6, forming a five-layer overlapping shape that is wider than the front-to-back width of the slit SL. This strongly restricts the grip portion 4 from being pulled into the slit SL.

As described above in Figure 2, the operating strap 1 is prevented from falling forward by the gripping portion 4 hitting the extension portion 5, so as shown in Figure 7, even when the seat back SB is folded forward, the operating strap 1 does not hang down below the seat back SB. Therefore, when the seat back SB is folded forward so that it overlaps the top surface of the seat cushion (not shown), the operating strap 1 can be appropriately prevented from becoming pinched between the seat back SB and the seat cushion.

As a result, it is possible to prevent indentations from being formed on both the seat back SB and the seat cushion due to the operating strap 1 being pinched. It is also possible to prevent damage caused by the operating strap 1 being pinched and incorrect operation due to unintentional catching.

To summarize the above, the operating strap 1 according to this embodiment has the following configuration. Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

That is, the operating strap (1) is a strip-shaped operating strap (1) that is pulled out to the outside of the seat through a slit (SL) formed in the surface of the seat, and includes a pull-out portion (3) that is pulled out from the slit (SL), a handle portion (4) that extends in a folded manner from the pulled-out end of the pull-out portion (3) and is sewn to close the pull-out portion in a circular shape, an extension portion (5) that forms a seam at the circularly sewn end of the handle portion (4) and extends in the opposite direction from the handle portion (4) so that it overlaps with the pull-out portion (3) in the pull-out direction, and a separation shape maintaining portion (H1) that maintains at least a portion of the extension portion (5) separated from the pull-out portion (3) in the thickness direction.

With the above configuration, the extension portion (5), which is maintained at a distance from the pull-out portion (3) in the thickness direction, prevents the grip portion (4) from entering the slit (SL) by the extension portion (5) hitting the sheet surface. In this way, a rational configuration that utilizes an innovative winding shape for the band-shaped operating strap (1) prevents the grip portion (4) from entering the slit (SL).

The separation shape maintaining portion (H1) is formed by folding the end of the extension portion (5) over and sewing it together with the stitching portion (6) that stitches the grip portion (4) into a ring shape, thereby maintaining the extension portion (5) in a ring-shaped expanded shape in the thickness direction from the pull-out portion (3).

The above configuration allows for the rationalization of the separation shape-retaining portion (H1). Furthermore, because the extension portion (5) maintains its shape by expanding annularly relative to the pull-out portion (3), the extension portion (5) can more appropriately prevent the grip portion (4) from entering the slit (SL).

In addition, the extended end of the extension portion (5) is sandwiched between the overlapping portions (4A, 4B) of the grip portion (4) that are sewn together in a circular shape, and is sewn together by the spaced shape-retaining portion (H1). This configuration allows the extension portion (5) to have a good appearance, with its terminals not exposed to the outside.

Furthermore, the extension portion (5) is held by the spaced shape retaining portion (H1), preventing the grip portion (4) from collapsing due to bending of the drawer portion (3) by hitting the sheet surface. With the above configuration, the extension portion (5) can appropriately prevent both the grip portion (4) from entering the slit (SL) and the grip portion (4) from collapsing due to bending of the drawer portion (3).

A slit (SL) is formed on the top surface of the seat back (SB) so that it opens upward. The operating strap (1) is an operating member that, when pulled by the grip portion (4), switches the headrest (HR) connected to the seat back (SB) to a state in which it can be tilted forward in the seat. The extension portion (5) prevents the grip portion (4) from colliding with the seat surface when it is tilted forward, but allows the grip portion (4) to collapse backward without colliding with the seat surface.

With the above configuration, the grip portion (4) is prevented from tilting forward, so that the direction in which the grip portion (4) tilts can always be directed toward the rear of the seat back (SB). This makes it easier for the user to grasp and pull the grip portion (4) from a position behind the seat back (SB). Furthermore, if the seat back (SB) is designed to be able to tilt forward, the grip portion (4) can be appropriately prevented from becoming pinched between the seat back (SB) and the seat cushion when the seat back (SB) tilts forward.

Second Embodiment
Next, the configuration of an operating strap 1 according to a second embodiment of the present invention will be described with reference to Fig. 8. In the operating strap 1 according to this embodiment, the extension portion 52 forming the seam allowance at the end of the annularly sewn grip portion 4 is not folded back upward in the figure, but is bent back forward from the pull-out portion 3 in the figure so as to form a U-shape in side view, and the end at that point is sewn to the pull-out portion 3 by another stitching portion 7. The another stitching portion 7 is configured to sew the end of the extension portion 52 to the pull-out portion 3 at a position away from the stitching portion 6 that sews the grip portion 4 into an annular shape, toward the lower side in the figure.

The distance between the seam 6 and another seam 7 is shorter than the circumference of the extension 52, which is bent forward in a U-shape in side view between them. Therefore, between the seam 6 and another seam 7 of the pull-out portion 3, the extension 52 is held in a circular shape that bulges forward from the pull-out portion 3 in the illustration, and this extension 52 appropriately prevents the grip portion 4 from entering the slit SL. Furthermore, this bulge prevents the extension 52 from colliding with the bezel BZ or the upper surface of the seat back SB when the pull-out portion 3 tries to collapse forward with its base end inserted through the slit SL as a fulcrum.

In this way, the operating strap 1 is configured such that the separate stitching 7 forms a spaced shape retaining portion H2 that holds the extension portion 52 in a circular shape bulging forward in the thickness direction from the pull-out portion 3. Similar to the stitching 6, the separate stitching 7 is configured to sew the end of the extension portion 52 to the pull-out portion 3 using an outstitch so that the stitching thread is visible from the front and back sides in the figure. As a result of this stitching, the extension portion 52 extends downward from the stitching 6 in the figure and upward from the separate stitching 7 in the figure, thereby properly retaining the shape pushed forward in the figure.

Note that the configuration other than that described above is substantially identical to that of the operation strap 1 shown in the first embodiment. Therefore, the configuration other than that described above is assigned the same reference numerals as those of the operation strap 1 shown in the first embodiment, and detailed explanations will be omitted.

Third Embodiment
Next, the configuration of an operating strap 1 according to a third embodiment of the present invention will be described with reference to Fig. 9. In the operating strap 1 according to this embodiment, an extension portion 53 forming a seam allowance at the end of the annularly sewn grip portion 4 extends downward in the figure, then folds back upward in the front in the figure, and the end of the extension portion 53 is overlapped on the front surface of the overlap portion 4A at the front side in the figure that is annularly sewn of the grip portion 4, and both overlap portions 4A, 4B are sewn together in the thickness direction at a sewing portion 6. The sewing portion 6 is configured to sew together the end of the extension portion 53 and both overlap portions 4A, 4B of the grip portion 4 using an outstitch so that the sewing thread is visible from the front and back sides in the figure.

As a result of the above stitching, the extension portion 53 is sewn onto the front surface of the drawer portion 3 to form a ring-shaped configuration aligned with the grip portion 4 in the vertical direction in the figure. In its free state, the extension portion 53 is configured to exert a restoring force that causes it to bulge forward from the drawer portion 3 in the figure, with the stitching portion 6 forming the closing portion of the ring-shaped configuration and the front surface of the drawer portion 3 facing rearward in the figure as fulcrums.

The above-mentioned bulge allows the extension 53 to form a thicker diameter portion between the pull-out portion 3 and the extension 53 that is wider in the front-to-back direction than the slit SL, thereby properly preventing the grip 4 from entering the slit SL. The above-mentioned bulge also prevents the extension 53 from colliding with the bezel BZ or the upper surface of the seat back SB when the pull-out portion 3 attempts to tilt forward with its base end inserted through the slit SL as a fulcrum.

In this way, the operating strap 1 is configured such that the stitching 6, which closes the end of the extension 53 into a ring shape, serves as a spaced-apart shape retaining portion H3 that holds the extension 53 in a ring-shaped shape expanding forward in the thickness direction from the pull-out portion 3. Note that other configurations are essentially the same as those of the operating strap 1 shown in the first embodiment. Therefore, the other configurations are denoted by the same reference numerals as those of the operating strap 1 shown in the first embodiment, and detailed descriptions thereof will be omitted.

Fourth Embodiment
Next, the configuration of an operating strap 1 according to a fourth embodiment of the present invention will be described with reference to Fig. 10. In the operating strap 1 according to this embodiment, an extension 54 forming the seam allowance at the end of the circularly sewn gripping portion 4 is configured to be bent obliquely downward in the front direction in the drawing by a bending portion 8 formed at the base end portion near the sewn portion 6.

As a result of this bending, the extension portion 54 is configured so that, in its free state, its extended end is held in a shape that protrudes diagonally downward and forward in the illustration relative to the drawer portion 3. This protrusion forms a thick-diameter portion between the extension portion 54 and the drawer portion 3 that is wider in the front-to-back direction than the slit SL, thereby properly preventing the grip portion 4 from entering the slit SL. Furthermore, this protrusion prevents the extension portion 54 from colliding with the bezel BZ or the upper surface of the seat back SB when the drawer portion 3 tries to tilt forward on the base end that is inserted through the slit SL as a fulcrum.

In this way, the operating strap 1 is configured such that the shaping section 8, which shaping the extension section 54 into a folded state, is formed as a spaced-apart shape-retaining section H4, which holds the extension section 54 in a shape that protrudes forward in the thickness direction from the pull-out section 3. Note that the rest of the configuration is essentially the same as the operating strap 1 shown in the first embodiment. Therefore, the rest of the configuration is given the same reference numerals as the operating strap 1 shown in the first embodiment, and detailed description will be omitted.

Other Embodiments
Although the present invention has been described above using four embodiments, the present invention can be embodied in various forms as described below in addition to the above embodiments.

1. The operating strap of the present invention may be configured to be pulled out from a slit formed on the top surface of the seat back, or may be configured to be pulled out from a slit formed on the side or rear surface of the seat back. The operating strap may also be configured to be pulled out from a slit formed on the top, side or rear surface of the seat cushion. The object operated by the operating strap is not particularly limited, and may be a mechanism other than a retractable headrest, such as a seat back reclining mechanism, a mechanism for lifting the seat cushion relative to the floor, a sliding mechanism, or a tip-up mechanism.

The seat may be a seat installed in a vehicle such as an automobile, or a seat installed in a vehicle other than a vehicle, such as an airplane or ship. The seat may also be a seat other than a vehicle, such as a spectator seat or massage seat installed in various facilities such as sports facilities, theaters, concert halls, and event venues.

The operating strap may be pulled out of the slit with its width extending horizontally (front to back, left to right) to match the shape of the slit, or it may be pulled out of the slit with its width extending vertically (vertically).

2. The separation shape-retaining portion, i.e., the separation shape-retaining portion that maintains at least a portion of the extension portion spaced apart from the draw-out portion in the thickness direction, may be configured to sew the extension portion to the draw-out portion or to itself in a circular shape, or may be configured to crease and/or sew a portion of the extension portion in a folded shape so that the extension portion can be spaced apart from the draw-out portion in a more desired shape.

3. The direction in which the extension prevents the gripping portion from tipping over due to bending of the drawer portion is not particularly limited and can be set appropriately depending on the application.

REFERENCE SIGNS LIST 1 Operation strap 2 Connection portion 3 Pull-out portion 4 Grip portion 4A Overlap portion 4B Overlap portion 5 Extension portion 6 Stitched portion 7 Another stitched portion 8 Crease portion 52 Extension portion 53 Extension portion 54 Extension portion SB Seat back SL Slit BZ Bezel HR Headrest H1 Separation shape retaining portion H2 Separation shape retaining portion H3 Separation shape retaining portion H4 Separation shape retaining portion

Claims (3)

A band-shaped operating strap is pulled out from a slit formed on the surface of the seat to the outside of the seat,
A drawn-out portion drawn out from the slit;
a grip portion that extends from the end of the drawn-out portion in a folded shape and is sewn to close the loop;
an extension portion that forms a seam allowance at the end of the annularly sewn grip portion, extends in the opposite direction from the grip portion, and overlaps with the pull-out portion in the pull-out direction;
a spaced shape retaining portion that retains at least a portion of the extension portion in a shape spaced apart from the pull-out portion in a thickness direction ,
The separation shape maintaining portion is an operation strap comprising a co-sewn portion that sews the grip portion into a ring shape, and the extended end of the extension portion is folded over and sewn together with the stitched portion, thereby maintaining the extension portion in a ring-shaped expanded shape in the thickness direction from the pull-out portion . 2. The operating strap of claim 1,
An operating strap in which the extended end of the extension portion is sandwiched between overlapping portions sewn together into a ring shape of the gripping portion and sewn together by the spaced shape maintaining portion . 3. The operating strap according to claim 1 or 2,
The extension portion is held by the spaced shape maintaining portion, and prevents the grip portion from collapsing due to bending of the pull-out portion by hitting the surface of the seat .