JP7537825B2 - Automobile seats - Google Patents

Description

This disclosure relates to an auxiliary car seat for use when three passengers are seated in the rear seat of a car.

Patent documents 1-3 describe an example of technology that allows three passengers to fasten their seat belts when sitting in the rear seats of a vehicle. In the technology described in these patent documents 1-3, three sets of seat belts are provided in advance inside the vehicle, and three sets of buckles are provided on the rear seats. Then, when the three passengers sit in the rear seats, they each pull out their seat belts and insert the metal fittings attached to the seat belts into the buckles to secure them, allowing all three passengers to fasten their seat belts.

Patent No. 3710395 JP 2010-247769 A Japanese Patent Application Publication No. 9-254741

The inventors of the present application recognized that when three passengers sit in the rear seats of a minicar, the first and second buckles that connect the first and second seat belts that are already installed in the minicar are covered by the passenger sitting in the middle, making it difficult to fasten the first and second seat belts that are already installed in the minicar.

Even in regular cars that are not light vehicles, there are cases where passengers wish to fasten a child car seat not in the passenger seat but in the center of the back seat, between the left seat and the center seat in the back seat, or between the right seat and the center seat in the back seat, with passengers riding on either side of it.

An object of the present disclosure is to provide an auxiliary seat for an automobile that enables, when three passengers are seated in the rear seats of the automobile, the passengers sitting on the left and right sides of the rear seats to fasten a first seat belt and a second seat belt that are pre-installed in the automobile.
Another object of the present disclosure is to provide a booster seat for an automobile in which a passenger can sit and in which a child seat can be attached.

The present disclosure provides an auxiliary seat for an automobile, the auxiliary seat having a first connection part connected to and disconnected from a first buckle provided on a seat of a rear seat of an automobile, a second connection part connected to and disconnected from a second buckle provided on the seat, a first auxiliary buckle to which a metal fitting of a first seat belt provided on the automobile is connected to and disconnected, a reinforcing member provided with the first connection part, the second connection part, the first auxiliary buckle, and the second auxiliary buckle, a main body part that covers the first connection part, the second connection part, the first auxiliary buckle, the second auxiliary buckle, and the reinforcing member and is placed on the seat for an occupant to sit on, an auxiliary seat belt attached to the reinforcing member and worn by an occupant seated on the main body part, and a storage space provided on the main body part in which a portion of the first connection part connected to the first buckle and a portion of the second connection part connected to the second buckle are disposed.

According to the present disclosure, when the automobile auxiliary seat is placed on the seat of the rear seat, the first connection part is connected to the first buckle of the seat, and the second connection part is connected to the second buckle of the seat, and the automobile auxiliary seat is attached to the seat. The first auxiliary buckle can be connected to a first seat belt that is already installed in the automobile, and the first auxiliary buckle can be connected to a second seat belt that is already installed in the automobile. Therefore, even if three passengers are seated on the seat, the passengers sitting on the left and right sides of the seat can use the first seat belt and the second seat belt that are already installed in the automobile. In addition, the auxiliary seat belt is worn by the passenger who is seated in the main body in the center of the three passengers. Therefore, all three passengers sitting on the seat can wear seat belts.

According to another embodiment of the present disclosure, the automobile auxiliary seat is configured so that the base portion and the seat portion can be separated, and the base portion has an ISOFIX mounting portion, so that a child seat or the like having an ISOFIX connector can be attached to the automobile auxiliary seat.

1 is a schematic front view of a seat assembly having an auxiliary seat according to an embodiment of the present disclosure; FIG. 2 is a perspective view of a booster seat according to one embodiment. 1 is a plan view of an auxiliary seat according to an embodiment of the present invention placed on a rear seat of a compact car when in use; 1 is a schematic front view of an auxiliary seat according to an embodiment in a state before being placed on a rear seat of a light vehicle. FIG. 1 is a schematic front view of an auxiliary seat according to an embodiment placed on a rear seat of a compact car. FIG. FIG. 11 is a schematic front view showing another example of use of the auxiliary seat according to the embodiment, showing the state before the auxiliary seat is placed on the seat portion. FIG. 11 is a schematic front view showing another example of use of the auxiliary seat according to the embodiment, in which the auxiliary seat is placed on the seat portion. FIG. 11 is a schematic perspective view of an auxiliary seat according to another embodiment, showing a state in which the base portion and the seat portion are separated. FIG. 2 is a schematic perspective view of a support seat having additional fastening means according to another embodiment; FIG. 13 is a schematic perspective view of a support seat having yet another additional fastening means according to another embodiment. 13A-13C are schematic perspective views showing connections that can accommodate different buckle positions according to another embodiment.

First Embodiment
A first embodiment of the auxiliary seat for a light vehicle according to the present disclosure will be described with reference to the drawings. In the following, an auxiliary seat for a light vehicle that can be attached to a light vehicle will be described as an example, but the auxiliary seat according to the present invention is not limited to use in light vehicles and can also be used in normal vehicles, and will be simply referred to as an "auxiliary seat" below. In all drawings for explaining the auxiliary seat, the same parts are generally given the same reference numerals, and repeated explanations will be omitted. FIG. 1 is a schematic front view showing the configuration of a seat device 70. The seat device 70 has a rear seat 11 of a light vehicle and an auxiliary seat 10 that is placed on the rear seat 11 and used. Prior to the explanation of the auxiliary seat 10, the rear seat 11 will be explained.

The rear seat 11 is arranged in the interior of the light vehicle. The rear seat 11 has a seat portion 12 fixed to the floor 60 of the light vehicle and a backrest 13 connected to the rear end of the seat portion 12. The backrest 13 is designed to be able to change the inclination angle with respect to the seat portion 12. The rear seat 11 can be divided into a first area 14 located on the right side in the direction of travel of the light vehicle, a second area 15 located on the left side in the direction of travel of the light vehicle, and an intermediate area 16 located between the first area 14 and the second area 15. Passengers can sit in the first area 14, the second area 15, and the intermediate area 16. For example, a child 17 can sit in the first area 14, a child 18 can sit in the second area 15, and an adult 19 for the children 17 and 18 can sit in the intermediate area 16. The adult 19 is, for example, a guardian of the children 17 and 18. In addition, the backrest 13 shown in FIG. 1 is an example in which the first region 14, the second region 15, and the middle region 16 are all integrally constructed, but the backrest 13 may be divided into two in the left-right direction A1 of the seat portion 12.

A first seat belt device 20 and a second seat belt device 21 are provided in the interior of a light vehicle. The first seat belt device 20 and the second seat belt device 21 shown in FIG. 1 are three-point seat belts that are pre-installed in light vehicles. The first seat belt device 20 has a belt body 22, a belt storage section 23, a metal fitting 24, and a buckle 25. The belt body 22 is made of a flexible material, for example, polyester, and is configured in a long shape. The belt storage section 23 is provided at a predetermined location on the vehicle body, for example, the rear pillar, and the belt storage section 23 winds and unwinds the belt body 22. The belt storage section 23 has an adjustment mechanism, which has a function of allowing the belt body 22 to be unwound and a function of preventing the belt body 22 from being unwound when a load of a predetermined value or more is applied to the belt body 22 within a predetermined time.

A first longitudinal end of the belt body 22 is connected to the adjustment mechanism, and a second longitudinal end of the belt body 22 is fixed to the seat 12 by a fixing portion 26 in the first region 14. The metal fitting 24 is attached to the belt body 22, and can move along the longitudinal direction of the belt body 22. The metal fitting 24 is provided with an engagement hole. The buckle 25 is attached to the seat 12 in the intermediate region 16. The buckle 25 has an insertion port, an operation button, and a locking mechanism.

The second seat belt device 21 includes a belt body 27, a belt storage portion 28, a metal fitting 29, and
and a buckle 30. The belt body 27 is made of a flexible material, such as polyester, and is formed into an elongated shape. The belt storage section 28 is provided at a predetermined location on the vehicle body, such as a rear pillar, and the belt storage section 28 winds and unwinds the belt body 27. The belt storage section 28 has an adjustment mechanism, which has a function of allowing the belt body 27 to be unwound and a function of preventing the belt body 27 from being unwound when a load of a predetermined value or more is applied to the belt body 27 within a predetermined time.

The first end of the belt body 27 in the longitudinal direction is connected to the adjustment mechanism, and the second end of the belt body 27 in the longitudinal direction is fixed to the seat 12 at the fixing portion 31 in the second region 15. The metal fitting 29 is attached to the belt body 27, and the metal fitting 29 can move along the longitudinal direction of the belt body 27. The metal fitting 29 is provided with an engagement hole. The buckle 30 is attached to the seat 12 in the intermediate region 16. The buckle 30 has an insertion port, an operation button, and a locking mechanism. The buckles 25 and 30 are arranged at a predetermined interval along the left-right direction A1 of the seat 12. The buckles 25 and 30 shown in FIG. 4 are examples in which the positions in the left-right direction A1 of the seat 12 are fixed, and the buckles 25 and 30 protrude a predetermined amount directly upward from the upper surface of the seat 12.

The auxiliary seat 10 is placed on the top surface of the seat portion 12 in the center in the left-right direction A1. When the seat portion 12 is viewed in plan, the auxiliary seat 10 has a shape and dimensions that fit within the arrangement area of the seat portion 12. As shown in Figures 2, 3, and 4, the auxiliary seat 10 has a main body portion 32, a reinforcing plate (board) 33, two buckles 34, 35 provided on the reinforcing plate 33, two boxes 61, 62 provided on the reinforcing plate 33, a first auxiliary seat belt 63 attached to the box 61, a second auxiliary seat belt 64 attached to the box 62, two engagement pieces 36, 37 provided on the reinforcing plate 33, and a storage space 38.

The main body 32 has a cushion and a covering material. The cushion is a sponge, a low-resilience urethane material, a silicone mat, or the like. The cushion is disposed on the front side of the reinforcing plate 33, i.e., on the upper side of the reinforcing plate 33 in FIG. 4, and is also disposed on the back side of the reinforcing plate 33, i.e., on the lower side of the reinforcing plate 33 in FIG. 4. The covering material is an element that covers the cushion and the reinforcing plate 33, and is made of leather, synthetic leather, synthetic fiber, or the like. It is preferable that the upper surface of the main body 32 has a shape that follows the buttocks of an adult 19. The thickness of the main body 32 above the reinforcing plate 33 is, for example, about 4 cm to 5 cm.

The reinforcing plate 33 is a reinforcing element for maintaining the shape of the auxiliary sheet 10, and is made of, for example, a metal plate. The reinforcing plate 33 has two overhangs 39, 40. The two overhangs 39, 40 are arranged at a predetermined interval along the left-right direction A1. The buckle 34 is attached to the overhang 39, and the buckle 35 is attached to the overhang 40. The buckles 34, 35 have the same basic configuration as the buckles 25, 30, and the buckles 34, 35 each have an insertion port, an operation button, and a locking mechanism. The auxiliary sheet 10 has two storage chambers 41, 42 provided by cutting out a part of the main body 32. The storage chambers 41, 42 are arranged at an interval in the left-right direction A1.

The boxes 61 and 62 are made of metal and have an arch shape. The boxes 61 and 62 are fixed, for example, by welding, to the surface of the reinforcing plate 33. The box 61 is disposed in the storage chamber 41. The buckle 34 is disposed in the box 61, and the buckle 34 is fixed to the reinforcing plate 33. The first auxiliary seat belt 63 has a first end in the longitudinal direction fixed to the outer surface of the box 61, and a buckle 65 is provided at a second end in the longitudinal direction of the first auxiliary seat belt 63. The first auxiliary seat belt 63 is disposed across the storage chamber 41 and the outside of the main body 32. The material of the first auxiliary seat belt 63 is the same as the material of the belt main body 22, and the configuration of the buckle 65 is the same as the configuration of the buckle 34.

The box 62 is disposed in the storage chamber 42. The buckle 35 is disposed in the box 62, and the buckle 35 is fixed to the reinforcing plate 33. The second auxiliary seat belt 64 has a first end in the longitudinal direction fixed to the outer surface of the box 62, and a metal fitting 66 is provided at a second end in the longitudinal direction of the second auxiliary seat belt 64. The second auxiliary seat belt 64 is disposed across the storage chamber 42 and the outside of the main body 32. The material of the second auxiliary seat belt 64 is the same as the material of the belt main body 27, and the configuration of the metal fitting 66 is the same as the configuration of the metal fitting 29. The metal fitting 29 can be attached to and detached from the buckle 65. The engagement pieces 36, 37 are disposed between the buckles 34 and 35 in the left-right direction A1.

As shown in FIG. 3, when the auxiliary seat 10 is viewed in plan, a storage space 38 is formed between the overhanging portions 39 and 40, surrounded on three sides by the main body portion 32. The storage space 38 is provided by cutting out a portion of the main body portion 32. When the auxiliary seat 10 is placed on the upper surface of the seat portion 12, the storage space 38 is located at the rearmost portion of the main body portion 32. An engagement piece 36 is provided on the overhanging portion 39, and an engagement piece 37 is provided on the overhanging portion 40. The engagement piece 36 is a metal piece connected to the overhanging portion 39. The engagement piece 37 is a metal piece connected to the overhanging portion 40.

Furthermore, an auxiliary element 67 as shown in FIG. 2 may be provided. The auxiliary element 67 has a shape and dimensions that allow it to be inserted into and removed from the storage space 38. The material of the auxiliary element 67 is the same as the material of the main body 32. The auxiliary element 67 has two notches 71, 69. The notch 71 has a shape and dimensions that allow the engagement piece 36 and the buckle 25 to enter. The notch 69 has a shape and dimensions that allow the engagement piece 37 and the buckle 30 to enter. The auxiliary element 67 is an element that fills the storage space 38 when the auxiliary sheet 10 is placed on the upper surface of the seat 12, and can be attached to and detached from the main body 32 using an element such as Velcro (registered trademark). The thickness of the main body 32 in the height direction is the same as the thickness of the auxiliary element 67 in the height direction. The height direction of the main body 32 and the auxiliary element 67 is the up-down direction of the seat 12. Furthermore, the auxiliary element 67 may have a structure and shape such that it is integrally connected to the main body 32 by a connecting piece, string, or the like instead of Velcro. It is preferable that the upper surface of the auxiliary element 67 has a shape that matches the shape of the buttocks of the adult 19.

When the auxiliary seat 10 is placed on the upper surface of the seat 12, the engagement pieces 36, 37 are arranged at a predetermined interval in the left-right direction A1 of the seat 12. The engagement pieces 36, 37 may be either a hook-shaped portion protruding from the reinforcing plate 33 bent, or a hook-shaped engagement piece 36, 37 welded to the reinforcing plate 33. The tip 36A of the engagement piece 36 protrudes toward the reinforcing plate 33, and the tip 37A of the engagement piece 37 protrudes toward the reinforcing plate 33. The shape and dimensions of the tip 36A of the engagement piece 36 are the same as those of the metal fitting 24. The shape and dimensions of the tip 37A of the engagement piece 37 are the same as those of the metal fitting 29. Figure 4 shows an example in which the distance between the engagement pieces 36, 37 in the left-right direction A1 corresponds to the distance between the buckles 25, 30.

In either case of a plan view of the auxiliary sheet 10 as shown in FIG. 3 or a front view of the auxiliary sheet 10 as shown in FIG. 4, the auxiliary sheet 10 has a symmetrical shape and structure. In the thickness direction of the main body 32, that is, in the vertical direction of FIG. 4, the reinforcing plate 33, the buckles 34, 35, and the engagement pieces 36, 37 are arranged within the range of the main body 32. When the auxiliary sheet 10 is viewed in a plan view as shown in FIG. 3, the engagement pieces 36 and 37 are arranged at intervals in the storage space 38. Furthermore, when the auxiliary sheet 10 is viewed in a plan view as shown in FIG. 3, all of the buckles 34, 35 are arranged within the arrangement area of the main body 32. In this way, the main body 32 covers the reinforcing plate 33, the buckles 34, 35, and the engagement pieces 36, 37. Also, as shown in FIG. 4, the tip 36A of the engagement piece 36 and the tip 37A of the engagement piece 37 are arranged in the storage space 38. Furthermore, when the auxiliary seat 10 is viewed from the front as in FIG. 4, the reinforcing plate 33, the buckles 34, 35, and the engagement pieces 36, 37 are all disposed within the thickness direction arrangement area of the main body 32. The thickness direction of the main body 32 is the up-down direction in FIG. 4.

When using the auxiliary seat 10, first, the storage space 38 is positioned directly above the buckles 25 and 30 as shown in FIG. 4. Then, the auxiliary seat 10 is lowered toward the seat 12, and the tip 36A of the engagement piece 36 is inserted into the insertion opening of the buckle 25, and the tip 37A of the engagement piece 37 is inserted into the insertion opening of the buckle 30. Furthermore, the locking mechanism of the buckle 25 locks the engagement piece 36, and the locking mechanism of the buckle 30 locks the engagement piece 37. Next, as shown in FIG. 5, the underside of the main body 32 is brought into contact with the seat 12. The rear end of the auxiliary seat 10 is brought into contact with the backrest 13. In this way, the auxiliary seat 10 is attached to the seat 12 and fixed.

When the auxiliary seat 10 is used, the auxiliary seat belts (kids belts) 43, 44, 59 are prepared in advance. With the child 17 seated on the seat 12 in the first area 14, the belt body 22 is brought into contact with the body of the child 17, and the metal fitting 24 is inserted into the storage chamber 41 and into the insertion opening of the buckle 34. Then, the locking mechanism of the buckle 34 locks the metal fitting 24. When the locking mechanism locks the metal fitting 24, the metal fitting 24 cannot be removed from the buckle 34. Furthermore, the clamps 44, 45 of the auxiliary seat belt 43 clamp the belt body 22. In this way, the portion of the belt body 22 between the metal fitting 24 and the belt storage section 23 is bent as shown in FIG. 1, preventing the belt body 22 from coming into contact with the neck of the child 17.

With the child 17 seated on the seat 12 in the second region 15, the belt body 27 is brought into contact with the body of the child 17, and the metal fitting 29 is inserted into the storage chamber 42 and into the insertion opening of the buckle 35. The locking mechanism of the buckle 35 then locks the metal fitting 29. When the locking mechanism locks the metal fitting 29, the metal fitting 29 cannot be removed from the buckle 35. Furthermore, the belt body 27 is clamped by the clamps 47 and 48 of the auxiliary seat belt 46. In this way, the portion of the belt body 27 between the metal fitting 29 and the belt storage section 28 is bent as shown in FIG. 1, preventing the belt body 27 from coming into contact with the neck of the child 18.

Furthermore, with the adult 19 seated on the main body 32 in the intermediate region 16, the first auxiliary seat belt 63 and the second auxiliary seat belt 64 are put around the adult 19, and the metal fittings 66 are inserted into the buckle 65 and fixed as shown in FIG. 1. When the auxiliary seat 10 of the present disclosure is placed on the seat portion 12 and the adult 19 sits on the auxiliary seat 10, the buckle 25 to which the metal fittings 24 of the belt main body 22 are connected and the buckle 30 to which the metal fittings 29 of the belt main body 27 are connected are covered by the buttocks of the adult 19. However, the buckle 34 can be connected to the metal fittings 24 of the belt main body 22, and the buckle 35 can be connected to the metal fittings 29 of the belt main body 27. Therefore, the child 17 seated on the seat portion 12 can wear the belt main body 22, and the child 18 seated on the seat portion 12 can wear the belt main body 27. Additionally, an adult 19 sitting in the main body 32 at the center of the seat 12 can wear the first auxiliary seat belt 63 and the second auxiliary seat belt 64.

In other words, the belt body 22 worn by the child 17 is supported at three points: the belt storage section 23, the fixing section 26, and the buckle 34. The belt body 27 worn by the child 18 is supported at three points: the belt storage section 28, the fixing section 31, and the buckle 35. The first auxiliary seat belt 63 worn by the adult 19 is supported by the box 61, and the second auxiliary seat belt 64 is supported by the box 62. Therefore, when a traveling light vehicle decelerates, the children 17, 18 and the adult 19 can be prevented from leaning forward due to inertial force.

When the operation button of buckle 34 is operated, the locking mechanism of buckle 34 unlocks metal fitting 24, allowing metal fitting 24 to be removed from buckle 34. When the operation button of buckle 35 is operated, the locking mechanism of buckle 35 unlocks metal fitting 29, allowing metal fitting 29 to be removed from buckle 35. Furthermore, metal fitting 66 can be removed from buckle 65.

When two adults 19 are seated in the rear seat 11, the auxiliary seat 10 is not placed on the seat 12. When the metal fitting 24 is inserted into the insertion hole of the buckle 25, the locking mechanism of the buckle 25 locks the metal fitting 24. When the locking mechanism locks the metal fitting 24, the metal fitting 24 cannot be removed from the buckle 25. When the operation button of the buckle 25 is operated, the locking mechanism of the metal fitting 24 is released, and the metal fitting 24 can be removed from the buckle 25. When the metal fitting 29 is inserted into the insertion hole of the buckle 35, the locking mechanism of the buckle 35 locks the metal fitting 29. When the locking mechanism locks the metal fitting 29, the metal fitting 29 cannot be removed from the buckle 35. When the operation button of the buckle 35 is operated, the locking mechanism of the metal fitting 29 is released, and the metal fitting 29 can be removed from the buckle 35.

As described above, when the auxiliary seat 10 is placed on the seat portion 12 of the rear seat 11 and an adult 19 sits on the auxiliary seat 10, the buckles 25, 30 of the seat portion 12 are not connected to the belt bodies 22, 27, but are used to attach the auxiliary seat 10 to the seat portion 12. The buckle 34 is connected to the metal fitting 24 of the belt body 22 worn by the first child 17. The buckle 35 is connected to the metal fitting 29 of the belt body 27 worn by the second child 18. Therefore, even if two children 17, 18 and one adult 19 sit on the seat portion 12, the belt bodies 22, 27 that are provided in advance can be used. Furthermore, the first auxiliary seat belt 63 and the second auxiliary seat belt 64 can be attached to the adult 19 sitting in the center of the seat portion 12. Therefore, all three passengers sitting on the rear seat 11 can wear their seat belts. Furthermore, if the storage space 68 is filled with the auxiliary element 67 shown in FIG. 2 and then an adult 19 sits on the auxiliary seat 10, it is possible to prevent a decrease in seating comfort due to the presence of the storage space 38.

(Other use cases)
6 and 7 show another example of use of the auxiliary seat 10. In this example, the buckles 25, 30 are arranged facing substantially upward, and the upper ends of the buckles 25, 30 are located on the upper surface of the seat portion 12. In this case, adapters (attachments) 51, 52 are used. The adapter 51 is an integral connection between a metal fitting 53 and a buckle 54. The metal fitting 53 has the same structure as the metal fitting 24. The buckle 54 has the same structure and function as the buckle 25. The adapter 52 is an integral connection between a metal fitting 56 and a buckle 57, and between the metal fitting 56 and the buckle 57. The metal fitting 56 has the same structure as the metal fitting 29. The buckle 57 has the same structure and function as the buckle 30.

When the auxiliary seat 10 of the present disclosure is placed on the seat portion 12 as shown in FIG. 7, the metal fitting 53 is connected to the buckle 25, and the engagement piece 36 is connected to the buckle 54. The metal fitting 56 is connected to the buckle 30, and the engagement piece 37 is connected to the buckle 57. The buckles 54 and 57 are disposed in the storage space 38.

Second Embodiment
8 is a schematic perspective view showing an auxiliary seat 80 according to a second embodiment. The auxiliary seat 80 is configured to be separable into a base portion 81 and a seat portion 82. Similar to the auxiliary seat 10, the auxiliary seat 80 is placed in the center in the left-right direction A1 on the upper surface of the seat portion 12. When the seat portion 12 is viewed in plan, the auxiliary seat 80 has a shape and dimensions that allow it to fit within the arrangement area of the seat portion 12. The auxiliary seat 80 is attached to the seat portion 82 on the base portion 81, fixed to the seat portion 12 in the same manner as the auxiliary seat 10, and used in the same manner as the auxiliary seat 10, so that, for example, an adult 19 who is a guardian of a child 17, 18 can sit on it.

The base portion 81 can be constructed by laminating a rubber layer 81B on a metal layer 81A. The method of bonding the metal layer 81A and the rubber layer 81B is not limited, and for example, a general-purpose method such as vulcanization adhesion can be used. The materials of the layers 81A and 81B are not limited to metal and rubber, and may be any material that can ensure strength and can firmly fix each part placed on the base portion 81 by general-purpose means such as welding or adhesion. In addition, it is preferable that the seat portion 82 has a buffer material (cushion) and a covering material. The buffer material can be sponge, low-resilience urethane material, silicone mat, etc., and the covering material can be made of leather, synthetic leather, synthetic fiber, etc. The upper surface of the seat portion 82 is preferably shaped to fit the buttocks of an adult 19. The seat portion 82 has overhanging portions 82b and 82c so as to cover the ISOFIX mounting brackets 85 and 86 to be attached to the base portion 81, which will be described later. The two protruding parts 82b, 82c are arranged at a predetermined distance from each other in the left-right direction A1. The seat part 82 also has cutouts at both rear corners that correspond to the positions of buckles 83, 84, which will be described later.

The method of fixing the base part 81 and the seat part 82 is not limited. For example, the base part 81 and the seat part 82 can be fixed by inserting multiple hooks provided on the lower surface 82d of the seat part 82 into receiving fittings provided on the upper surface 81e of the base part 81. Alternatively, the base part 81 and the seat part 82 can be fixed by providing multiple through holes in the base part 81 and screwing male screws inserted into the through holes from the bottom surface 81d into multiple female threads provided on the lower surface 82d of the seat part 82. Alternatively, the two can be fixed using a hook-and-loop fastener.

The base portion 81 has two overhanging portions arranged at an interval along the left-right direction A1 at its rear end portion. Buckles 83, 84 are attached to the ends of the overhanging portions (i.e., both corners of the rear portion of the base portion 81). The buckles 83, 84 are attached to the metal layer 81A, for example, by welding. The basic configuration of the buckles 83, 84 is the same as that of the buckles 25, 30, and the buckles 83, 84 each have an insertion port, an operation button, and a locking mechanism. In the auxiliary seat 10 according to the first embodiment shown in FIG. 2, the buckles 34, 35 are configured so that the metal fittings 24, 29 of the first and second seat belt devices 20, 21, respectively, are inserted from the side. In contrast, in the auxiliary seat 80, the insertion ports of the buckles 83, 84 face upward so that the metal fittings 24, 29 can be inserted from above. In FIG. 8, the buckles 83 and 84 are shown attached directly to the base portion 81, but this is not limited thereto, and they may be disposed within a box attached to the metal layer 81A, similar to the boxes 61 and 62 within which the buckles 34 and 35 are disposed.

In this embodiment, a child seat (not shown) can be placed on the base portion 81 instead of the seat surface portion 82. For this purpose, the base portion 81 is provided with ISOFIX mounting brackets 85, 86 to which the ISOFIX connector of the child seat can be attached. The ISOFIX mounting bracket 85 is disposed between the buckle 83 and the engagement piece 36 at the protruding portion, and the ISOFIX mounting bracket 86 is disposed between the buckle 84 and the engagement piece 37 at the protruding portion. The ISOFIX mounting brackets 85, 86 are attached to the metal layer 81A, for example, by welding, through a through hole provided in the rubber layer 81B. The ISOFIX mounting brackets 85, 86 are provided at the rear end of the hollow box body with anchors 85a, 86a of the same shape as the general-purpose ISOFIX anchors that are required to be attached to automobiles. The child seat can be fixed to the base portion 81 by connecting the ISOFIX connector of, for example, a child seat inserted from the front of the auxiliary seat 80 to the anchors 85a, 86a. When the seat section 82 is placed on the base section 81, the ISOFIX mounting brackets 85 and 86 are accommodated in the accommodation chambers 82b1 and 82c1 provided in the protruding sections 82b and 82c.

The auxiliary seat 80, like the auxiliary seat 10, is provided with seat belts for the adult 19 seated in the auxiliary seat 80, i.e., a first auxiliary seat belt 63 and a second auxiliary seat belt 64. The first auxiliary seat belt 63 has a first longitudinal end attached to a metal fitting 63a rotatably provided on the buckle 83. The second auxiliary seat belt 64 has a first longitudinal end attached to a metal fitting 64a rotatably provided on the buckle 84. The metal fittings 63a and 64a may be attached to the base portion 81, instead of the buckles 83 and 84. Alternatively, when the buckles 83 and 84 are disposed in a box as described above, the metal fittings 63a and 64a may be attached to the box. Alternatively, the buckles 83 and 84 may be attached to a metal plate that is welded to the metal layer 81A of the base portion 81. The first and second auxiliary seat belts 63, 64 get in the way when the base portion 81 and the seat surface portion 82 are separated and a child seat is placed on the base portion 81. Therefore, it is preferable that the base portion 81 is provided with a storage portion for storing the first and second auxiliary seat belts 63, 64 when not in use. Therefore, the base portion 81 has grooves 81b, 81c corresponding to at least a part of the length of the first and second auxiliary seat belts 63, 64 when not in use. When not in use, the first auxiliary seat belt 63 can be partially arranged along the side surface of the base portion 81 and the remaining part can be stored in the groove 81b. Similarly, when not in use, the second auxiliary seat belt 64 can be partially arranged along the side surface of the base portion 81 and the remaining part can be stored in the groove 81c. The position, length and depth of the grooves 81b, 81c are not limited, and can be arbitrarily modified in design so that the first and second auxiliary seat belts 63, 64 can be stored when not in use.

In the base portion 81, a storage space 81a is formed at the position where the engaging pieces 36 and 37 are arranged, similar to the storage space 38 in the first embodiment, and a storage space 82a is formed in the seat portion 82. At least the tips 36A and 37A of the engaging pieces 36 and 37 are arranged in the storage spaces 81a and 82a. In the second embodiment, the engaging pieces 36 and 37 may be either ones in which the parts protruding from the metal layer 81A are bent into a hook shape, or ones in which the hook-shaped engaging pieces 36 and 37 are fixed to the metal layer 81A by welding or the like. When the seat portion 82 is fixed to the base portion 81, the auxiliary elements 67 can be provided in these storage spaces 81a and 82a as shown in FIG. 2. Alternatively, as shown in FIG. 8, the seat portion 82 may be provided with a storage space cover 90 that covers the storage space 82a. The method of attaching the storage space cover 90 to the seat portion 82 is not limited, and it can be attached so as to be openable, closable, or detachable using, for example, hook-and-loop fasteners, hooks, lock pins, screws, hinges, etc. It is preferable that the upper surface of the storage space cover 90 has a shape that matches the shape of the buttocks of an adult 19.

The auxiliary seat 80 can be fixed to the seat portion 12 by inserting the two engagement pieces 36, 37 into the buckles 25, 30 provided on the rear seat 11 of the light vehicle. However, it is preferable that the auxiliary seat 80 is provided with additional fixing means so that the auxiliary seat 80 can be secured in a case where the two engagement pieces 36, 37 alone are insufficient. The additional fixing means can be the rear fins 91, 92, the front stays 93, 94, or the bottom fins 96, or a combination of these.

9(a) is a schematic perspective view of the auxiliary seat 80 having rear fins 91, 92 as additional fixing means. The rear fins 91, 92 can be plate-shaped bodies provided so as to protrude rearward from the rear end of the base portion 81. The rear fins 91, 92 are preferably provided at an appropriate interval in the left-right direction A1. By inserting the rear fins 91, 92 protruding rearward from the base portion 81 into the gap between the seat portion 12 and the backrest 13 of the rear seat 11 of the light vehicle, the auxiliary seat 80 can be fixed more firmly to the rear seat 11. Note that the rear fins 91, 92 can be used both together or only one of them depending on the need for fixing. In addition, the width, thickness, protrusion amount and material of the rear fins 91, 92 can be arbitrarily changed in design depending on the need for fixing. Furthermore, the rear fins are not limited to being provided one on each protruding portion, and for example, two or more may be provided on each protruding portion depending on the need for fixing.

When not in use, the rear fins 91, 92 are preferably stored in slit-shaped storage sections 81f, 81g provided in the base section 81, respectively, and when in use, they are slid from the storage sections 81f, 81g to protrude from the rear end of the base section 81. The storage sections 81f, 81g are preferably provided in thick sections formed at corresponding positions of the metal layer 81A. The rear fins 91, 92 that have been slid and protruded can be fixed in a protruding state by a general-purpose fixing method using, for example, a lock pin or a screw provided so that they can be inserted into the storage sections 81f, 81g from the top surface 81e or bottom surface 81d of the base section 81. Alternatively, an insertion port for the rear fins 91, 92 may be provided at the rear of the base section 81, and the rear fins 91, 92 may be removed and stored separately when not in use, and the rear fins 91, 92 may be inserted into the insertion port and fixed when in use. Alternatively, the rear fins 91, 92 may be fixed non-removably to the rear end of the base portion 81.

9(b) is a schematic perspective view of the auxiliary seat 80 having front stays 93, 94 as further additional fixing means. The front stays 93, 94 can be rod-shaped bodies provided so as to protrude forward from the front end of the base portion 81. The front stays 93, 94 are preferably provided with plate-shaped bodies at the ends opposite the seat portion 81. The front stays 93, 94 are preferably provided at appropriate intervals in the left-right direction A1. The front stays 93, 94 protruding forward from the base portion 81 or the plate-shaped bodies at their ends can be pressed against the back of the backrest of the front seat (not shown) of the light vehicle, thereby more firmly fixing the auxiliary seat 80 to the rear seat 11. Note that the front stays 93, 94 can be used both together or only one of them depending on the need for fixing. The thickness and material of the front stays 93, 94 can be arbitrarily changed in design depending on the need for fixing. It is preferable that the front stays 93, 94 have an expandable structure, similar to that used in tension rods, so that the length can be adjusted as desired depending on the position of the front seat.

When not in use, the front stays 93 and 94 are preferably stored in the long hole-shaped storage sections 81h and 81i provided in the base section 81, respectively, and when in use, they are slid from the storage sections 81h and 81i to protrude from the front end of the base section 81. The storage sections 81h and 81i are preferably provided in thick sections formed at corresponding positions of the metal layer 81A. The front stays 93 and 94 that have been slid and protruded can be fixed in a protruding state by a general-purpose fixing method using, for example, a lock pin or a screw that is provided so that it can be inserted into the storage sections 81h and 81i from the top surface 81e or bottom surface 81d of the base section 81. Alternatively, an insertion port for the front stays 93 and 94 may be provided at the front of the base section 81, and when not in use, the front stays 93 and 94 may be removed and stored separately, and when in use, the front stays 93 and 94 may be inserted into the insertion port and fixed. Alternatively, the front stays 93, 94 may be fixed non-detachably to the front end of the base portion 81.

10 is a perspective view of the base portion 81 having a bottom fin 96 as an additional fixing means, and is a view of the base portion 81 viewed from the direction of the bottom surface 81d. Note that the seat portion 82 is not shown in FIG. 10. The bottom fin 96 can be a plate-like body provided so as to protrude vertically downward from the bottom surface 81d of the base portion 81. The bottom fin 96 is provided so that its length direction extends in the front-rear direction of the base portion 81. The widthwise position of the bottom fin 96 on the bottom surface 81d can be arbitrarily changed in design depending on the configuration of the seat portion 12 of the vehicle type in which the auxiliary seat 80 is used. In addition, the length, thickness, protrusion amount, and material of the bottom fin 96 can be arbitrarily changed in design depending on the need for fixing. By inserting the bottom fin 96 protruding downward from the bottom surface 81d of the base portion 81 into the gap between adjacent seats of the seat portion 12 of the light vehicle, the auxiliary seat 80 can be effectively prevented from moving in the lateral direction.

The bottom fins 96 are preferably attached removably. The method of making them removable is not particularly limited. For example, as shown in FIG. 10, a bottom fin insert member 95 having a slit 95a into which a portion corresponding to the horizontal bar of a long fin member having a T-shaped cross section can be inserted and a portion corresponding to the vertical bar of the T (i.e., the bottom fins 96) can be protruded downward can be attached to the bottom surface 81d of the base portion 81, and the bottom fins 96 can be inserted into the bottom fin insert member 95 as necessary for use. If necessary, instead of attaching the bottom fin insert member 95 to the bottom surface 81d, a portion into which the bottom fins 96 can be inserted may be provided in the base portion 81 itself, and the slit 95a may be opened on the bottom surface 81d. Alternatively, the bottom fins 96 may be attached to the bottom surface 81d by fixing the portion corresponding to the horizontal bar of the T to the bottom surface 81d with a screw or the like. Alternatively, the bottom fins 96 may be fixed to the bottom surface 81d of the base portion 81 in an undetachable manner.

The buckles 25 and 30 arranged on the seat 12 of a minicar may differ in their left-right spacing, front-rear position, height or direction of the insertion port, structure and size, etc. depending on the manufacturer or model of the minicar. Therefore, it is preferable that the engagement pieces 36, 37 of the auxiliary seat 80 are compatible with different manufacturers or models. For example, the distance between the engagement pieces 36, 37 can be configured to be arbitrarily changed so that the buckles 25, 30 can be compatible with multiple manufacturers or models with different widths.

11(a) and 11(b) are schematic perspective views showing engagement pieces that can accommodate different buckle intervals. Note that the seat surface portion 82 is not shown in FIG. 11. In this embodiment, the engagement pieces 36, 37 have tips 36A, 37A that engage with the buckles 25, 30, and bases 36B, 37B that are continuous therewith. At least a portion of the bases 36B, 37B is inserted into the storage portions 81j, 81k provided in the base portion 81, respectively. The engagement pieces 36, 37 are also designed to be fixed in a state in which the bases 36B, 37B are pulled out from the storage portions 81j, 81k by the required length. The fixing method is not limited, and can be fixed by a general-purpose fixing method using a lock pin or screw that is provided so that it can be inserted into the storage portions 81j, 81k from the top surface 81e or bottom surface 81d of the base portion 81.

In addition, it is preferable that the engagement piece of the auxiliary seat 80 is configured to correspond to different buckle positions or orientations depending on the vehicle model. That is, the longitudinal position of the buckles 25, 30 provided on the rear seat 11 of a light vehicle, or the height or orientation of the insertion opening may differ depending on the vehicle model. For example, the buckles 25, 30 may be located behind or in front of the position where the engagement piece is fixed to the auxiliary seat 80, and/or the insertion opening of the buckles 25, 30 may be located at a higher or lower position. The engagement piece can be configured so that the auxiliary seat 80 can be used across such a plurality of different vehicle models. The above-mentioned engagement pieces 36, 37 may be prepared in a plurality of types with different longitudinal positions, heights, or orientations of the tips 36A, 37A, or combinations thereof, and the most suitable engagement piece 36, 37 may be inserted and fixed into the storage section 81j, 81k depending on the position of the insertion opening of the buckles 25, 30.

11(c) is a schematic perspective view showing an example of the configuration of an engagement piece, 100, 101, in which the portion having a tip inserted into the insertion port of the buckle 25, 30 and the portion fixed to the base member 81 are configured as separate members. The engagement piece 100 is composed of a replaceable part 100a having a tip 100A inserted into the buckle 25, and a fixed part 100b fixed to the base part 81. The shape and dimensions of the tip 100A are the same as those of the metal fitting 24. The replaceable part 100a and the fixed part 100b can be connected, for example, by inserting a screw 100d provided on the fixed part 100b into a hole 100c provided in the replaceable part 100a and fixing them with a nut (not shown). Similarly, the engagement piece 101 is made up of a replaceable part 101a having a tip 101A that is inserted into the buckle 30, and a fixed part 101b that is fixed to the base part 81. The shape and dimensions of the tip 101A are the same as those of the tip of the metal fitting 29. The replaceable part 101a and the fixed part 101b can be connected, for example, by inserting a screw 101d provided on the fixed part 101b into a hole 101c provided in the replaceable part 101a and fixing them with a nut (not shown).

Figure 11(d) is a schematic perspective view showing another form of an engagement piece in which the part having a tip that is inserted into the insertion port of the buckle 25, 30 and the part that is fixed to the base member 81 are constructed as separate members. Note that Figure 11(d) is a view seen from the direction of the upper surface 81e of the base part 81, unlike Figures 11(a) to (c). The engagement piece 102 consists of a replaceable part 102a having a tip 102A that is inserted into the buckle 25, and a fixed part 102b that is fixed to the base part 81. The shape and dimensions of the tip 102A are the same as those of the tip of the metal fitting 24. The replaceable part 102a and the fixed part 102b can be connected by inserting the lower part 102c of the replaceable part 102a into the slit 102d provided in the fixed part 102b and fixing them with a lock pin or screw. Similarly, the engagement piece 103 is made up of a replaceable part 103a having a tip 103A that is inserted into the buckle 30, and a fixed part 103b that is fixed to the base part 81. The shape and dimensions of the tip 103A are the same as those of the tip of the metal fitting 29. The replaceable part 103a and the fixed part 103b can be connected by inserting the lower part 103c of the replaceable part 103a into a slit 103d provided in the fixed part 103b and fixing them with a lock pin or screw. The engagement piece 102 (not shown) that is connected to the buckle 25 is constructed in the same manner.

It is preferable to prepare a plurality of types of replaceable parts 100a, 101a, 102a, and 103a, each of which has a shape in which the tip 100A, 101A, 102A, and 103A is located forward, rearward, higher, lower, or tilted forward or rearward, or a combination of these, from the positions shown in Fig. 11(c) and Fig. 11(d), when connected to the fixed parts 100b, 101b, 102b, and 103b. When using the auxiliary seat 80, the most suitable replaceable parts 100a, 101a, 102a, and 103a are selected according to the position of the insertion opening of the buckles 25, 30 of the rear seat 11 on which the auxiliary seat 80 is placed, and after connecting them to the fixed parts 100b, 101b, 102b, and 103b, the auxiliary seat 80 can be attached to the seat 12 and fixed.

(Other explanations)
An example of the technical meaning of the matters described in this embodiment is as follows. The auxiliary seats 10, 80 are an example of an auxiliary seat, and the seat portion 12 is an example of a seat portion. The buckle 25 is an example of a first buckle, and the buckle 30 is an example of a second buckle. The engagement pieces 36, 100 are an example of a first connecting portion, and the engagement pieces 37, 101 are an example of a second connecting portion. The belt main body 22 is an example of a first seat belt, and the belt main body 27 is an example of a second seat belt. The buckles 34, 83 are an example of a first auxiliary buckle, and the buckles 35, 84 are an example of a second auxiliary buckle. The reinforcing plate 33 is an example of a reinforcing member. The main body portion 32 is an example of a main body portion. The base portion 81 is an example of a base portion, and the seat portion 82 is an example of a seat portion. The ISOFIX mounting bracket 85 is an example of a first ISOFIX mounting part that can engage with an ISOFIX connector used in a child seat, etc., and the ISOFIX mounting bracket 86 is an example of a second ISOFIX mounting part that can engage with an ISOFIX connector used in a child seat, etc.

The first auxiliary seat belt 63 and the second auxiliary seat belt 64 are examples of auxiliary seat belts. The auxiliary seat belt attached to the reinforcing member may be either a structure in which the auxiliary seat belt is directly attached to the reinforcing member, or a structure in which the auxiliary seat belt is indirectly attached to the reinforcing member. The storage space 38, the storage space 81a, and the storage space 82a are examples of storage spaces. The left-right direction A1 is an example of a specified direction. The storage chamber 41 is an example of a first buckle storage chamber, and the storage chamber 42 is an example of a second buckle storage chamber. The tips 36A and 100A of the engagement piece 36 are examples of "a portion of the first connection part that is connected to the first buckle". The tips 37A and 101A of the engagement piece 37 are examples of "a portion of the second connection part that is connected to the second buckle". Base 36B of engagement piece 36 is an example of a "portion of the first connection portion that is fixed to the base portion," and base 37B of engagement piece 37 is an example of a "portion of the second connection portion that is fixed to the base portion." Housing 81j is an example of a first connection portion housing portion, and housing 81k is an example of a second connection portion housing portion.

Grooves 81b and 81c provided on base portion 81 are an example of a storage portion for storing an auxiliary seat belt. Rear fin 91 provided on base portion 81 is an example of a first insertion fixing portion, and rear fin 92 is an example of a second insertion fixing portion. Front stay 93 provided on base portion 81 is an example of a first abutment fixing portion, and front stay 94 is an example of a second abutment fixing portion. Bottom fin 96 provided on base portion 81 is an example of a third insertion fixing portion.

This embodiment is not limited to those disclosed using the drawings, and various modifications are possible without departing from the gist of the present invention. For example, the distance between the buckle 25 and the buckle 30 in the left-right direction A1 in FIG. 4 and FIG. 5 may differ depending on the manufacturer or model of the minicar. For this reason, the auxiliary seat 10 of the present disclosure can be adapted by preparing multiple types of seats with different distances between the engagement pieces 36 and 37 in the left-right direction A1. For example, multiple lineups of auxiliary seats 10 can be prepared, such as narrow, normal, and wide distances between the engagement pieces 36 and 37 in the left-right direction A1. In addition, the shape, structure, orientation, and size of the engagement pieces 36 and 37 can be arbitrarily modified so as to match the shape, structure, orientation, and size of the buckles 25 and 30.

The reinforcing plate 33 may have any material and shape that can ensure strength, and when the reinforcing plate 33 is viewed in plan as in FIG. 3, holes may be provided at any location to reduce the weight of the reinforcing plate 33 and the amount of material used. The reinforcing member is not limited to a plate shape, but may also be a frame shape. The storage space 38, 81a, 82a in which the buckle 25, 30 or the buckle 54, 57 is disposed may be a hole that penetrates the main body 32 or the base member 81 and the seat surface 82 in the thickness direction, or a recess provided in the main body 32 or the base member 81 and the seat surface 82. The first and second seat belt devices that are provided in advance in the light vehicle may have a structure having a two-point belt body supported by a belt storage portion provided in the seat and a buckle.

This embodiment also describes the following seat device. For example, in a seat device having a first seat belt and a second seat belt provided in a light vehicle, a seat portion having a first buckle to which the fittings of the first seat belt are connected and a second buckle to which the fittings of the second seat belt are connected, and an auxiliary seat for a light vehicle placed on the seat portion, the auxiliary seat for a light vehicle includes a first connection portion connected to the first buckle, a second connection portion connected to the second buckle, a first auxiliary buckle to which the fittings of the first seat belt are connected, a second auxiliary buckle to which the fittings of the second seat belt are connected, and a first connection portion, The seat device is described as having a reinforcing member on which the second connection portion, the first auxiliary buckle, and the second auxiliary buckle are provided, a main body portion that covers the first connection portion, the second connection portion, the first auxiliary buckle, the second auxiliary buckle, and the reinforcing member and is placed on the seat portion on which an occupant sits, an auxiliary seat belt that is attached to the reinforcing member and worn by an occupant sitting on the main body portion, and a storage space that is provided on the main body portion and in which a portion of the first connection portion that is connected to the first buckle and a portion of the second connection portion that is connected to the second buckle are disposed.

This embodiment can be used as an auxiliary car seat that allows three passengers to sit in the rear seat of a car.

10 Auxiliary seat 12 Seat portion 22, 27 Belt body 25, 30, 34, 35 Buckle 32 Body portion 33 Reinforcement plate 36, 37 Engagement piece 36A, 37A Tip 38 Storage space 41, 42 Storage chamber 63 First auxiliary seat belt 64 Second auxiliary seat belt 80 Auxiliary seat 81 Base portion 82 Seat surface portion 83, 84 Buckle 85, 86 ISOFIX mounting bracket 90 Storage space cover 91, 92 Rear fins 93, 94 Front stay 95 Bottom fin insertion portion 96 Bottom fins 100, 101, 102, 103 Engagement piece A1 Left-right direction

Claims (8)

a first connection portion that is connected to and released from a first buckle provided on a seat portion of a rear seat of the automobile;
A second connection portion that is connected to and released from a second buckle provided in the seat portion;
a first auxiliary buckle for connecting and disconnecting a metal fitting to a first seat belt provided in the vehicle;
A second auxiliary buckle that connects and disconnects a metal fitting to a second seat belt provided in the vehicle;
a base portion provided with the first connecting portion, the second connecting portion, the first auxiliary buckle, and the second auxiliary buckle;
an accommodation space provided in the base portion, in which a portion of the first connection portion connected to the first buckle and a portion of the second connection portion connected to the second buckle are disposed;
The seat cushion further includes a first insertion fixing portion and a second insertion fixing portion that are provided at a rear portion of the base portion so as to protrude rearward from the base portion and are inserted between the seat portion and the backrest portion of the rear seat in order to fix the base portion to the rear seat.
Automobile auxiliary seat. a first ISOFIX attachment portion engageable with an ISOFIX connector;
and a second ISOFIX attachment portion engageable with the ISOFIX connector.
The first ISOFIX mounting portion and the second ISOFIX mounting portion are provided on the base portion.
2. The auxiliary seat for a vehicle according to claim 1 . a seat portion on which an occupant sits, the seat portion being provided so as to cover at least the first connection portion, the second connection portion, and the base portion;
an accommodation space provided in the seat portion, in which a portion of the first connection portion connected to the first buckle and a portion of the second connection portion connected to the second buckle are disposed;
2. The auxiliary seat for an automobile according to claim 1 , further comprising an auxiliary seat belt worn by an occupant sitting on said seat portion. The base portion has a storage portion for storing the auxiliary seat belt when the auxiliary seat belt is not in use.
4. An auxiliary seat for a motor vehicle according to claim 3. the first connection portion and the second connection portion are disposed at an interval in a predetermined direction of the base portion,
The first auxiliary buckle and the second auxiliary buckle are disposed at an interval in the predetermined direction,
In the predetermined direction, the first connection portion and the second connection portion are disposed between the first auxiliary buckle and the second auxiliary buckle,
The predetermined direction is the same as the left-right direction of the seat on which the base portion is placed.
2. The auxiliary seat for a vehicle according to claim 1 . In order to fix the base portion to the rear seat, the seat further includes a first contact fixing portion and a second contact fixing portion that are provided in front of the base portion so as to protrude forward from the base portion and contact a backrest portion of a front seat disposed in front of the rear seat of the automobile.
2. The auxiliary seat for a vehicle according to claim 1 . The seat cushion further includes a third insertion and fixing portion provided on a bottom surface of the base portion and inserted into a gap between adjacent seat portions of the rear seat in order to fix the base portion to the rear seat.
2. The automobile auxiliary seat according to claim 1 . The first connection portion has a portion of the first connection portion that is connected to the first buckle and a portion of the first connection portion that is fixed to the base portion,
the second connection portion includes a portion of the second connection portion that is connected to the second buckle and a portion of the second connection portion that is fixed to the base portion,
the base portion includes a first connection portion accommodating portion that accommodates at least a portion of the first connection portion that is fixed to the base portion, and a second connection portion accommodating portion that accommodates at least a portion of the second connection portion that is fixed to the base portion.
2. The automobile auxiliary seat according to claim 1 .

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