JP7500257B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat.

As a configuration using resin parts for vehicle seats, there is one in which a recess is formed near the front end of the armrest and a cylindrical cup holder with a bottom made of resin or the like is embedded in the recess to store a beverage container (cup), and another in which a resin film is formed on the part that supports the headrest stay to reduce frictional resistance when the stay is removed.

For example, Patent Document 1 describes a method in which a cup holder made of synthetic resin material is inserted into a skin piece formed into a bag shape through an attachment hole in the skin piece, and then a foaming resin material is injected into the interior of the skin piece formed into a bag shape to form a resin foam inside the skin, thereby integrally molding the cup holder and the armrest.

Patent document 2 also describes a headrest for a vehicle seat in which the surface of the inner cylinder of the headrest support is covered with a resin film with a low coefficient of friction.

JP 2018-665 A JP 2017-52309 A

In the configuration described in Patent Document 1, when a foamed resin material is injected into the interior of the bag-shaped skin piece of the armrest to form a resin foam inside the skin, a seal made of a wadding material is formed around the opening edge of the mounting hole to prevent the foamed resin material from leaking out from between the skin piece and the cup holder made of synthetic resin material inserted into the interior of the skin piece through the mounting hole.

This seal is formed by sewing or gluing a seal made of a wadding material to the opening edge of the mounting hole in the skin piece before inserting the cup holder into the skin piece through the mounting hole.

However, forming a seal made of a wadding material on the opening edge of the mounting hole requires a process of joining the seal to the opening edge of the mounting hole of the skin piece by sewing or gluing, which becomes an obstacle to reducing the number of steps.

In addition, the surface of a cup holder made of a synthetic resin material generally has a low coefficient of friction, so when trying to remove a container such as a beverage stored inside the cup holder, the container may move around inside the cup holder, making it difficult to remove.

In addition, the headrest configuration described in Patent Document 2 has the surface of the inner cylindrical portion of the headrest support covered with a resin film that has a lower coefficient of friction with the outer surface of the stay than the material that constitutes the headrest support, but no consideration is given to configuring the headrest support so that this resin film makes it difficult for it to come loose from the member that supports the headrest support (the headrest bracket).

The present invention solves the problems of the conventional technology described above and enables a surface with a high friction coefficient and a non-slip surface to be formed on a portion of a vehicle seat through a relatively simple process. Specifically, the present invention provides a vehicle seat with an armrest that allows a cup holder to be easily attached to the armrest through a relatively simple process, and a vehicle seat with a headrest that has a configuration that makes it difficult for the headrest support to come off from the member (headrest bracket) that supports the headrest support.

In order to solve the above problems, the present invention provides a vehicle seat that includes a seat cushion, a seat back, and a headrest, and the vehicle seat is partially made of a resin material, and this resin material has a large number of minute projections and recesses formed on a portion of its surface, and the area with the large number of minute projections and recesses is formed to have a larger coefficient of friction than the portion of the soft shell where the minute projections and recesses are not formed.

In order to solve the above-mentioned problems, the present invention provides a vehicle seat including a seat cushion, a seat back, and a headrest, the headrest having a stay extending from the headrest and a headrest bracket having a hole through which the stay passes,
The headrest bracket is configured to be inserted into a hole formed in a head support fixed to the seat back and supported by the seat back, and a layer made of a resin material is formed on the inner surface of the hole through which the stay formed in the headrest bracket passes and on the surface of the part of the headrest bracket that is inserted into the hole formed in the head support, and a large number of minute irregularities are formed on the surface of the layer of resin material formed on the surface of the part of the layer made of resin that is inserted into the hole formed in the head support.

Furthermore, in order to solve the above-mentioned problems, the present invention provides a vehicle seat equipped with a seat cushion, a seat back, and a headrest, in which the seat back has a foldable table on the underside, the surface of which is covered with a resin material, and a large number of minute projections and recesses are formed on the surface of the resin material.

According to the present invention, a soft resin material such as an elastomer with minute irregularities on the surface (hereinafter referred to as a soft shell) is used on a portion of a vehicle seat to increase the coefficient of friction of this portion, making it possible to form a skin with a non-slip surface through a relatively simple process.

1 is a perspective view of a vehicle seat according to a first embodiment of the present invention; 2 is a cross-sectional view of the armrest of the vehicle seat according to the first embodiment of the present invention taken along line AA in FIG. 1. 1 is a cross-sectional view of a cup holder of a vehicle seat according to a first embodiment of the present invention. 1 is a cross-sectional view of a bottom portion of a cup holder being irradiated with a laser from a laser light source in a state in which the inner surface of the bottom portion of the cup holder in accordance with the first embodiment of the present invention is irradiated with a laser to form minute irregularities. 1 is a perspective view of a rear seat (or a second seat) of a vehicle seat according to a first embodiment of the present invention. FIG. 11 is a perspective view of a vehicle seat according to a second embodiment of the present invention. FIG. 11 is a perspective view of a seat back and a headrest of a vehicle seat according to a third embodiment of the present invention. 8 is a cross-sectional view of the seat back of the vehicle seat according to the third embodiment of the present invention taken along the line BB in FIG. 7. FIG. 11 is a perspective view of a vehicle seat according to a fourth embodiment of the present invention, as viewed from the rear. 10 is a cross-sectional view of the table of the vehicle seat according to the fourth embodiment of the present invention taken along the line CC in FIG. 9 . FIG. 11 is a side view of a hook portion of a vehicle seat according to a fourth embodiment of the present invention.

The present invention uses a resin material such as a soft shell with minute irregularities on the surface of a portion of a vehicle seat, and by increasing the coefficient of friction of this portion, it is possible to form the surface of the resin material such as a soft shell to be less slippery or to give the surface a rough texture, in a relatively simple process.

In the present invention, resin components such as soft shells formed in this way are used for the cup holders in armrests, the areas around the operation buttons on the sides of the seat cushions, the brackets, tables, hooks, etc. of headrests.

The following describes in detail an embodiment of the present invention with reference to the drawings. In all drawings used to explain the present embodiment, parts having the same functions are given the same reference numerals, and repeated explanations are generally omitted.

However, the present invention should not be interpreted as being limited to the description of the embodiments shown below. Those skilled in the art will easily understand that the specific configuration can be changed without departing from the concept or spirit of the present invention.

As a first embodiment of the present invention, an example in which the present invention is applied to a cup holder formed in an armrest will be described with reference to Figures 1 to 4.

Figure 1 is a perspective view showing the exterior of a vehicle seat 100 according to this embodiment. The vehicle seat 100 according to this embodiment includes a seat cushion 110 on which a passenger sits, a seat back 120 that supports the back of the seated passenger, a headrest 130 that protects the head of the seated passenger, and an armrest 140 on which the passenger seated on the seat cushion 110 rests their arms.

A cup holder 141 is formed near the tip of the armrest 140. In addition, the peripheral regions 146 and 147 of the cup holder 141 have minute irregularities on the surface, and have a relatively large frictional resistance compared to other parts of the surface of the armrest 140. The cup holder 141 and its peripheral regions 146 and 147 may be formed from the same resin material, or may be formed from different resin materials. In addition, of the peripheral regions 146 and 147 of the cup holder 141, only the peripheral region 146 located on the upper surface of the armrest 140 may have minute irregularities on the surface.

Figure 2 shows a cross-sectional view of the armrest 140 in Figure 1 taken along the line A-A. In Figure 2, 150 denotes the rotation axis of the armrest 140, which is supported by the seat back 120. 151 denotes the frame of the armrest 140, which is rotatably supported by the rotation axis 150.

The armrest 140 is formed by covering the surface with a skin member 1401 and filling the interior with a cushion member 1402 made of urethane foam.

141 is a cup holder, which is made of a resin material (e.g., a soft shell). 145 is a recess formed in the cushion member 1402 for inserting the cup holder, which is molded together with the cushion member 1402 when the cushion member 1402 is molded. However, the cup holder 141 may be made in a separate process from the cushion member 1402, and then fitted into the cushion member 1402.

Figure 3 shows the cross-sectional shape of the cup holder 141. The cup holder 141 is made of a resin material such as a soft shell, and the outer periphery 144 of the cylindrical portion is inserted into a recess 145 for inserting the cup holder, which is formed in the cushion member 1402.

Here, a portion 1440 is formed on part of the surface of the outer periphery 144 of the cylindrical portion of the cup holder 141, the outer diameter of which is slightly larger than the other portions. This portion 1440 with a slightly larger outer diameter has minute irregularities 1441 formed therein, as shown in a partial enlarged view in FIG. 3. The outer diameter of the portion 1440 with a slightly larger outer diameter and in which the minute irregularities 1441 are formed is formed slightly larger than the inner diameter of the recess 145 for inserting the cup holder, which is formed in the cushion member 1402.

In this way, when the cup holder 141 having the minute irregularities 1441 formed on part of the outer periphery 144 is inserted into the recess 145 for inserting the cup holder formed in the cushion member 1402, resistance is encountered because the outer diameter of the portion where the minute irregularities 1441 are formed is slightly larger than the inner diameter of the recess 145 for inserting the cup holder. However, because the cup holder 141 including the minute irregularities 1441 is formed from a resin member, the cup holder 141 including the minute irregularities 1441 deforms in response to the pressing force. This allows the cup holder 141 to be inserted to a predetermined depth into the recess 145 for inserting the cup holder.

Once the cup holder 141 is inserted into the cup holder insertion recess 145, the minute irregularities 1441 provide resistance, making it difficult for the cup holder 141 to easily come out of the cup holder insertion recess 145.

As a result, the cup holder 141 can be stably held in the recess 145 for inserting the cup holder, which is formed in the cushion member 1402, with a relatively simple configuration, without the need for special processing around the entrance of the recess 145 for inserting the cup holder, as described in Patent Document 1.

In addition, in this embodiment, minute irregularities 1431 are formed on the inner surface of the bottom 143 of the cup holder 141, as shown in the enlarged view, so that the coefficient of friction is greater than in the portion of the surface of the cup holder 141 where such minute irregularities 1431 are not formed.

By forming minute irregularities 1431 on the inner surface of the bottom 143 of the cup holder 141, the container stored in the cup holder 141 is less likely to slip against the bottom 143 of the cup holder 141, so that the container can be inserted and removed smoothly from the cup holder 141.

Next, a method for forming minute irregularities 1441 on a portion 1440 with a slightly larger outer diameter on the outer peripheral surface of a cup holder 141 formed from a resin member such as a soft shell, and a method for forming minute irregularities 1431 on the inner surface of a portion of the bottom 143 will be described with reference to FIG. 4. In this embodiment, a case where a soft shell is used as the resin member will be described.

Figure 4 shows the state in which minute irregularities 1431 are formed on the inner surface of the bottom 143 of the cup holder 141 by discretely irradiating the laser 211 emitted from the laser light source 210. The laser 211 emitted from the laser light source 210 is a pulsed laser.

By adjusting the number of irradiation pulses of the laser 211 and the laser power when the laser 211 is irradiated to the same location of the soft shell forming the bottom 143 of the cup holder 141, it is possible to change the depth d and size (hole diameter) w of the minute irregularities 1431 formed in the bottom 143 of the cup holder 141. In addition, by controlling the pitch at which the laser 211 is discretely irradiated, it is possible to adjust the pitch p of the minute irregularities 1431.

By adjusting the power of the laser 211 emitted from the laser light source 210, the number of irradiation pulses to the same location, and the feed pitch of the laser 211 according to the hardness of the soft shell that forms the cup holder 141, it is possible to adjust the degree of frictional resistance in the areas where the minute irregularities 1441 and 1431 are formed.

Figure 1 also shows the state in which the laser 211 is irradiated onto the peripheral area 146 of the cup holder 141 of the armrest 140 to roughen the surface of the peripheral area 146, giving the surface a rough texture and making the frictional resistance of the peripheral area 146 greater than the frictional resistance of the rest of the armrest 140.

By making the frictional resistance of the peripheral area 146 of the cup holder 141 of the armrest 140 greater than that of the surface of other parts of the armrest 140, the possibility of a hand holding a beverage container slipping on the surface of the peripheral area 146 of the cup holder 141 is reduced. This increases safety when inserting or removing a beverage container into the cup holder 141.

Figure 5 is a perspective view showing a vehicle seat according to this embodiment, showing the rear seat (or second seat) 300 of the vehicle.

The rear seat 300 is available in a type that is equipped with an armrest 340 that can rotate around its base between the seats 310 and 320 on both sides. When not in use, the armrest 340 is stored in the armrest storage section 331 of the middle seat 330 in an upright position, and when in use, the armrest 340 is folded forward around its base as shown in FIG. 5.

Even in the armrest 340 configured in this way, the cup holder 341 formed of a resin material such as the soft shell described in Figures 2 to 4 can be used. By using such a cup holder 341, the cup holder 341 can be stably held in the armrest 340 without falling out of the armrest 340, even if the armrest 340 is repeatedly inserted and removed from the armrest storage section 331 formed in the middle seat 330.

In the embodiment described above, an example was described in which the cup holder 341 was formed in the armrest 340, but the invention can also be applied to a cup holder provided in a console box (not shown).

This embodiment provides a vehicle seat equipped with an armrest that allows the cup holder to be easily attached to the armrest through a relatively simple process.

As an application example of forming minute irregularities on the surface of a resin member such as a soft shell by discretely irradiating the surface with a pulsed laser to partially change the frictional resistance of the surface of the resin member, in Example 2, as shown in FIG. 6, a case is described in which the irregularities are formed around a button-shaped switch 112 installed on the side surface 111 of a seat cushion 110 of a vehicle seat 200.

In the configuration shown in FIG. 6, the configuration including the seat cushion 110 and the seat back 120 is the same as the configuration of the vehicle seat 100 described in the first embodiment.

In the vehicle seat 200, a switch 112 may be provided on the side of the seat cushion 110 for adjusting the height of the seat cushion 110 or the inclination of the seat back 120.

This switch 112 is installed on the side 111 of the seat cushion 110, so the passenger has to insert their hand into the side of the seat cushion 110 and feel around to find the location of the switch 112.

In contrast to this, in this embodiment, the peripheral area (hereinafter simply referred to as the area) 113 surrounding the switch 112 is processed with irregularities equivalent to the minute irregularities 1431 described in the first embodiment, so that the frictional resistance is greater than that of the surrounding area, creating a rough feel.

The microscopic irregularities formed in region 113 are formed by adjusting the dimensions corresponding to the depth d of microscopic irregularities 1431, the diameter w of the opening of microscopic irregularities 151, and the spacing (pitch) p of microscopic irregularities 151 as described in Figure 4, so that when the surface is touched by hand, the difference from a region where no microscopic irregularities are formed can be immediately felt.

By processing area 113 in this way, when a passenger seated on seat cushion 110 searches for switch 112 by hand, area 113 is formed around switch 112 with a rough texture that has a higher frictional resistance than the surrounding area, making it easier to find the location of switch 112, improving operability of the switch, and preventing erroneous operation.

As an application example of partially changing the frictional resistance of the surface of a resin member such as a soft shell by discretely irradiating the surface of the resin member with a pulsed laser to form minute irregularities on the surface of the resin member, an example of application to a portion that stores the stays of a headrest is described as a third embodiment using Figures 7 and 8.

In this embodiment, as shown in FIG. 7, the stay 132 extending from the main body 131 of the headrest 130 is inserted into the headrest bracket 133, and then inserted into the headrest support 160 fixed to the frame of the seat back 120 (not shown), so that the headrest 130 is supported by the seat back 120.

Figure 8 shows a cross-sectional view taken along the line B-B in Figure 7, with the headrest bracket 133 inserted into the headrest support 160 fixed to the frame of the seat back 120 (not shown). In this embodiment, a case where a soft shell is used as the resin member will be described.

The cylindrical portion 1332 of the headrest bracket 133 is inserted into the hole 121 formed in the headrest support 160, and the flange portion 1331 abuts against the headrest support 160 and stops. The stay 132 of the headrest 130 is inserted into the hole 1330 formed in the headrest bracket 133.

A membrane 135 made of a soft shell is formed on the outer circumferential surface of the cylindrical portion 1332 of the headrest bracket 133.

As shown in the enlarged view of the circled portion of the cylindrical portion 1332 in FIG. 8, the surface of the membrane 134 formed of a soft shell on the inner peripheral surface of the cylindrical portion 1332 of the headrest bracket 133 is flat and is formed so as to reduce frictional resistance with the stay 132 of the headrest 130 inserted into the hole 1330.

On the other hand, on the outer peripheral surface of the cylindrical portion 1332 that contacts the hole 121 formed in the headrest support 160, a membrane 135 formed of a soft shell has minute irregularities 1351 formed on the surface by the laser processing described in Example 1.

The outer diameter of the surface of the membrane 135 formed of the soft shell formed on the outer peripheral surface of the cylindrical portion 1332 is formed slightly larger than the inner diameter of the hole 121 formed in the headrest support 160. Therefore, when the cylindrical portion 1332 of the headrest bracket 133 is inserted into the hole 121 formed in the headrest support 160, resistance is encountered to the extent that the outer diameter of the surface of the membrane 135 formed of the soft shell is slightly larger than the inner diameter of the hole 121, but the cylindrical portion 1332 can be inserted into the hole 121 by the deformation of the minute irregularities 1351 formed on the surface of the membrane 135 formed of the soft shell. The greater the deformation amount of the minute irregularities 1351, the greater the coefficient of friction between the membrane 135 formed of the soft shell and the hole 121.

On the other hand, when the cylindrical portion 1332 of the headrest bracket 133 is inserted into the hole 121 formed in the headrest support 160, if you try to pull the cylindrical portion 1332 of the headrest bracket 133 out of the hole 121 formed in the headrest support 160, a force similar to that required to insert the cylindrical portion 1332 into the hole 121 is required.

Now, if you try to lift the headrest 130 and pull the stay 132 out of the hole 1330 of the headrest bracket 133, a force that pulls the headrest bracket 133 upward is generated due to frictional resistance between the stay 132 and the surface 1341 of the membrane 134, which is made of a soft shell formed on the inner surface of the hole 1330 of the headrest bracket 133.

However, the inner diameter of the surface 1341 of the membrane 134 formed from the soft shell in the cylindrical portion 1332 is larger than the outer diameter of the stay 132, and the surface 1341 of the membrane 134 formed from the soft shell is formed flat, so the coefficient of friction between the stay 132 and the surface 1341 of the membrane 134 formed from the soft shell is smaller than the coefficient of friction between the membrane 135 formed from the soft shell, which has minute irregularities 1351 formed on the outer surface of the cylindrical portion 1332 of the headrest bracket 133, and the hole 121 formed in the headrest support 160.

As a result, when the headrest 130 is lifted and the stay 132 is pulled out of the hole 1330 of the headrest bracket 133, the frictional force generated when the stay 132 comes into contact with the inner surface of the hole 1330 is less than the force required to pull the cylindrical portion 1332 of the headrest bracket 133 upward toward the hole 121 formed in the headrest support 160, and the cylindrical portion 1332 of the headrest bracket 133 remains fixed in the hole 121 formed in the headrest support 160.

In addition, by adjusting the dimensions of the minute irregularities 1351 on the surface of the film 135 formed of a soft shell on the outer circumferential surface of the cylindrical portion 1332 of the headrest bracket 133, which correspond to the depth d of the minute irregularities 1431, the diameter w of the opening of the minute irregularities 1431, and the spacing (pitch) p of the minute irregularities 1431 as described in FIG. 4, the cylindrical portion 1332 of the headrest bracket 133 can be securely fixed without easily slipping out of the hole 121 formed in the headrest support 160.

The minute irregularities 1351 on the surface of the film 135 formed of the soft shell may be formed over the entire outer circumferential surface of the cylindrical portion 1332 of the headrest bracket 133, or may be formed partially.

This embodiment provides a vehicle seat equipped with a headrest that is configured so that the headrest support is not easily dislodged from the member (headrest bracket) that supports the headrest support.

In addition, according to this embodiment, when the cylindrical portion 1332 of the headrest bracket 133 is inserted into the hole 121 formed in the headrest support 160, the minute irregularities 1351 on the surface of the film 135 formed of a soft shell on the outer circumferential surface of the cylindrical portion 1332 of the headrest bracket 133 are deformed to increase the coefficient of friction between the minute irregularities 1351 and the hole 121, thereby enabling the cylindrical portion 1332 of the headrest bracket 133 to be securely held in the hole 121 formed in the headrest support 160.

This prevents the headrest bracket 133 from easily coming loose from the headrest support 160.

As an application example of the method of partially changing the frictional resistance of a resin member surface by discretely irradiating the surface of the resin member such as a soft shell with a pulsed laser to form minute irregularities on the surface of the resin member, an example of application to a table or hook portion attached to the underside of a seat back will be described as the fourth embodiment using Figures 9 to 11.

Figure 9 is a perspective view of the vehicle seat 400 as seen from the rear. A table 410 is attached to the rear side of the seat back 120. The table 410 is attached to the rear side of the seat back 120 so as to be rotatable and foldable around an internal hinge as shown, and when not in use, can be folded and stored in a storage section 420 formed on the side of the seat back 120. Figure 9 shows the table 410 rotated from the storage section 420 so that it can be used.

The back side of the seat back 120 is also provided with a hook portion 430 for hanging a bag or the like.

Figure 10 shows a part of the CC cross section of the table 410 in Figure 9. 411 is the table body, and 412 is a surface cover made of a resin material such as a soft shell that covers the surface of the table body 411.

Microscopic irregularities 413 are formed on the surface of the surface cover 412. As described in Example 1 using FIG. 4, these microscopic irregularities 413 are formed by discretely irradiating the surface cover 412 with a laser (pulse laser) 211 emitted from the laser light source 210.

In this way, by forming minute irregularities 413 on the surface of the surface cover 412, the coefficient of friction of the surface is increased compared to a case where the surface cover 412 has a flat surface without forming minute irregularities 413 on the surface. As a result, when the vehicle vibrates while traveling, items placed on the table 410 are less likely to move on the table 410, reducing the risk of items falling off the table 410.

In addition, by forming minute irregularities 413 on the surface of the surface cover 412, the sticky feeling of the hands when touching the table 410 can be reduced compared to when the minute irregularities 413 are not formed, and the feel when touching can be improved.

The friction coefficient of the surface of the surface cover 412 can be adjusted by adjusting the dimensions of the minute irregularities 413 on the surface of the surface cover 412, which is formed from a resin material such as a soft shell, that correspond to the depth d of the minute irregularities 1431, the diameter w of the opening of the minute irregularities 1431, and the spacing (pitch) p of the minute irregularities 1431, as described in Figure 4.

The surface cover 412 may be formed to cover the entire table body 411, or may be formed to cover only a portion of it. The minute irregularities 413 may be formed on the entire surface of the surface cover 412, or may be formed on only a portion of it. Furthermore, the dimensions of the minute irregularities 413, which correspond to the depth d of the minute irregularities 1431, the diameter w of the opening of the minute irregularities 1431, and the spacing (pitch) p of the minute irregularities 1431 as described in FIG. 4, may be changed according to the position on the surface cover 412.

Figure 11 shows a side view of the hook portion 430. The hook portion 430 is fixed to the seat back 120, and a skin 432 made of a resin material such as a soft shell is formed on the inner surface of the hook portion 431.

The surface of this skin 432 has minute irregularities (not shown) that correspond to the minute irregularities 413 described in FIG. 10, and the friction coefficient is relatively large compared to when the minute irregularities are not formed.

In this way, by forming a skin 432 made of a resin material such as a soft shell on the inner surface of the hook portion 431 and forming minute irregularities on the surface, it is possible to prevent luggage such as a bag hung from the hook portion 430 from easily falling off the hook portion 430 when the vehicle vibrates while traveling.

In this embodiment, minute projections and recesses are formed on the surface of the table and the inner surface of the hook portion to make them less slippery, reducing the risk that items placed on the table will slide off the table and fall to the floor due to vibrations while the vehicle is moving, or that bags hung on the hook portion will come off the hook portion and fall.

The invention made by the inventor has been specifically described above based on the examples, but it goes without saying that the present invention is not limited to the above examples and can be modified in various ways without departing from the gist of the invention. For example, the above examples have been described in detail to clearly explain the invention, and the invention is not necessarily limited to those having all of the configurations described. In addition, it is possible to add, delete, or replace part of the configuration of each example with other configurations.

REFERENCE SIGNS LIST 100, 200, 300 Vehicle seat 110 Seat cushion 120 Seat back 130 Headrest 132 Stay 133 Headrest bracket 134, 135 Film formed of resin material such as soft shell 140, 340 Armrest 141, 341 Cup holder 160 Headrest support 210 Laser light source 1351, 1431, 1441, 413 Micro unevenness 400 Rear seat 410 Table 430 Hook portion

Claims (4)

A vehicle seat including a seat cushion, a seat back, and a headrest,
A vehicle seat characterized in that a resin material is used in the surrounding area of a switch installed on a side of the seat cushion, the resin material has a large number of minute projections and recesses formed on a portion of its surface, and the area where the large number of minute projections and recesses are formed has a larger coefficient of friction than a portion of the resin material where the minute projections and recesses are not formed. 2. The vehicle seat according to claim 1 , wherein the resin member is a soft shell, and the minute projections and recesses are formed by discretely irradiating the soft shell with a laser. 2. The vehicle seat according to claim 1 , wherein the resin member is a soft shell, and the minute projections and recesses are formed by discretely irradiating the soft shell with a pulsed laser. 2. The vehicle seat according to claim 1, wherein the switch is for adjusting the inclination of the seat back.

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