JP2021079763A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which can suppress the lateral slip of a tether belt without impairing the designability of a seat back.SOLUTION: A vehicle seat 1 includes a seat back 3 (5) which has a seat back frame 10 (12), a pad 40 covering the frame and a trim 42, and can be attached with a child seat having a tether belt Tb. The seat back frame 10 (12) comprises: a frame upper side part 21a which is arranged on the upper end part thereof and extends in the sheet width direction; and a belt regulation part 26 which has a left side regulation part 27a and a right side regulation part 27b that are fixed on both sides of a position through which the tether belt Tb passes in the frame upper side part 21a and suppress the lateral slip of the tether belt Tb. The belt regulation part 26 is provided so as to protrude upward from the frame upper side part 21a and is entirely covered by the pad 40 and the trim 42.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle seat such as an automobile, and more particularly to a vehicle seat in which a tether mounting portion for locking a tether belt of a child seat is provided on the back surface of a seat back or the like.

In order to improve the mounting stability of the child seat to the vehicle seat (hereinafter, simply referred to as the seat), the tether belt (also referred to as the tether strap) provided on the child seat is locked to the tether mounting portion provided on the back of the seat back or the like. Is being done.

For example, Patent Document 1 discloses a child seat mounting structure in which a tether belt provided on an upper portion of the back surface of a child seat is guided to the back surface of the seat back through between two stays of a headrest and locked to a tether mounting portion. There is. According to such a child seat mounting structure, the tether belt regulates the forward displacement of the child seat in the event of a vehicle collision, so that the safety of the occupants (infants and children) on the child seat can be ensured to a higher degree. ..

Due to the difference in the rigidity balance of the seat back (seat back frame) in the seat width direction, the tether belt shifts laterally (side slip) along the seat back to the side where the rigidity is relatively low at the time of a vehicle collision. It is known that the low-rigidity portion is deformed by the tension acting on the. In such a case, the mounting stability of the child seat may be impaired. Therefore, in Patent Document 1, a resin hook plate is provided between the two stays of the headrest on the upper surface of the seat back, and a tether belt is passed between the two hooks on the left and right sides of the hook plate. The tether belt is locked to the tether mounting portion. That is, the left and right hooks of the hook plate suppress the lateral displacement of the tether belt.

Japanese Unexamined Patent Publication No. 2003-191780

However, in a structure in which a resin hook plate is provided on the upper surface of the seat back as in Patent Document 1, the sense of unity (design) between the hook plate and other parts of the seat back (seat) is impaired. There is. In order to alleviate this point, it is possible to prepare and use multiple types of hook plates that match each of the seat back trim materials and colors, but in this case, in addition to the proper use when assembling the seat, parts It is not always a good idea because it will increase the management burden.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique capable of suppressing lateral displacement of a tether belt in a vehicle seat without impairing the design of the seat back. ..

The vehicle seat according to one aspect of the present invention has a seat back frame, a pad covering the seat back frame, and a child seat having a trim covering the pad, and a child seat having a tether belt can be attached. The seat back frame is an upper end portion of the frame that is arranged at the upper end portion and extends in the seat width direction, and at least one of the upper side portions of the frame and a position through which the tether belt passes. It is provided with a belt regulating portion that is fixed at a position on the side and suppresses lateral displacement of the tether belt, and the belt regulating portion is provided so as to project upward from the upper side portion of the frame and is entirely covered by the pad and the trim. It is what is being said.

According to this vehicle seat, a belt regulation part for suppressing lateral displacement of the tether belt is provided as a part of the seat back frame, and the whole is covered from the outside by pads and trims, which impairs the design of the seat back. It is possible to suppress lateral displacement of the tether belt without any problem.

In the above-mentioned vehicle seat, it is preferable that the belt restricting portion is made of a bent metal rod material.

Since the seat back frame is generally constructed by using a metal pipe material or a metal bar material, according to the above configuration in which the belt regulating portion is made of a metal bar material, a member constituting the seat back frame. It is possible to provide a belt regulation part using the same member as the above, which is advantageous in terms of member procurement and cost.

In that case, for example, the seat back frame includes the upper side portion of the frame and is arranged along the peripheral edge portion of the seat back, and is arranged inside the frame main portion to specify the frame main portion. In the case where the frame reinforcing portion made of a metal rod material is included to connect the portions of the above, the frame reinforcing portion and the belt restricting portion are continuously integrated by the same rod material. It is preferable that it is formed in.

According to this configuration, since the belt regulating portion is included in the frame reinforcing portion as a part of the frame reinforcing portion, compared with the case where a dedicated part as the belt regulating portion is separately assembled to the frame main portion (frame upper side portion), The seat back frame is easy to assemble, and the burden of managing parts can be reduced. Therefore, it contributes to the improvement of sheet productivity.

Further, the seat back includes a headrest, and a tubular holder portion that supports the headrest by fixing the seat back frame to the front surface of the upper side portion of the frame and accepting a stay for supporting the headrest. When the above is included, it is preferable that the belt restricting portion is fixed to the rear surface of the upper side portion of the frame and is in contact with the holder portion from the rear side.

According to this configuration, the holder is supported from the rear side by the belt regulating portion. Therefore, it is possible to increase the supporting strength of the holder and the headrest with a rational configuration using the belt regulating portion.

In this case, it is preferable that the belt restricting portion is curved toward the front and the upper end portion is in contact with the holder portion from the rear side.

According to this configuration, the belt regulating portion has a shape that generally follows the appearance shape of the seat (seat back). Therefore, it is possible to provide the belt regulating portion while increasing the supporting strength of the headrest and without affecting the appearance shape of the seat.

In the vehicle seat of each of the above aspects, the belt restricting portion has an inverted U-shape in front view or rear view of the seat, and both end portions are welded to the upper side portion of the frame. There may be.

According to this configuration, it is possible to provide a belt regulating portion having sufficient strength to suppress lateral displacement of the tether belt with a simple and inexpensive configuration.

According to the vehicle seat according to each of the above aspects, it is possible to suppress lateral displacement of the tether belt without impairing the design of the seat back.

It is a perspective view of the vehicle seat (rear seat) which concerns on embodiment of this invention. It is a rear view which shows the seat back frame of a vehicle seat. It is a left side view (partial sectional view) of the seat back of a vehicle seat. It is explanatory drawing explaining the lateral displacement suppression function of a tether belt by a belt regulation part, (a) shows the relationship between a belt regulation part and a tether belt before a vehicle collision, and (b) is a belt regulation part and a tether belt at the time of a vehicle collision. The relationship is shown. It is a rear view of the main part of the seat back frame which shows the modification of the belt regulation part. It is a rear view of the main part of the seat back frame which shows the modification of the belt regulation part. It is a left side view of the seat back which shows the modification of the belt regulation part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Overall configuration of vehicle seats]
FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention. The vehicle seat 1 shown in the figure is a rear seat used as a rear seat of the vehicle.

The terms related to "direction" (front, rear, left, right, etc.) used in the following description are based on the vehicle seat 1 mounted on the vehicle.

The vehicle seat 1 is a so-called split foldable seat in which the seat back can be divided and tilted, and as shown in FIG. 1, the seat cushion 2 extending in the vehicle width direction and the seat cushion 2 The left side seat back 3 corresponding to the left side area of the seat cushion 2, the central seat back 4 corresponding to the central area of the seat cushion 2, and the right side seat back 5 corresponding to the right side area of the seat cushion 2 are provided. There is. Each of the seat backs 3 to 5 is provided with headrests 3A, 4A, and 5A at the upper ends.

The ratio of the left seat back 3, the center seat back 4, and the right seat back 5 in the vehicle width direction is 4: 2: 4. The right seat back 5 and the center seat back 4 and the left seat back 3 can be individually tilted in the front-rear direction, and by tilting forward so as to fold over the seat cushion 2, the luggage compartment space behind the vehicle seat 1 can be tilted. Etc. can be extended. Further, the central seat back 4 can be separated from the right seat back 5 and can be tilted forward independently, and by tilting forward so as to fold over the seat cushion 2, it can be used as an armrest for an occupant seated on both the left and right sides thereof. It has become.

Of the vehicle seats 1, the seat cushion 2 is fixedly supported by the floor portion 7 of the vehicle body. On the other hand, the left seat back 3 and the right seat back 5 are supported so as to straddle the floor portion 7 of the vehicle body and the inner wall portion outside the drawing of the vehicle body such as the wheel house frame, and the central seat back 4 is the floor. It is supported by part 7.

The left seat back 3 is provided with a pair of left and right mounting holes 3B and a tether mounting portion 3C for mounting a child seat (not shown) conforming to the ISOFIX standard. The mounting holes 3B are provided at the lower end of the left seat back 3 at predetermined intervals in the seat width direction. The tether mounting portion 3C is provided at the center portion of the back surface of the left seat back 3. That is, the child seat conforming to the ISOFIX standard is provided with a pair of left and right connecting metal fittings called connectors on the lower back surface thereof, and is provided with a tether belt on the upper back surface thereof. Alternatively, the child seat can be attached to the vehicle seat 1 by locking the tether belt to an anchor portion provided on the seat cushion frame (not shown) and connecting the tether belt to the tether mounting portion 3C via the upper surface portion of the left seat back 3. It can be attached to.

The right seat back 5 is also provided with a pair of left and right mounting holes 5B and a tether mounting portion 5C, and like the left seat back 3, a child seat (not shown) compliant with the ISOFIX standard can be mounted. It has become.

[Detailed structure of vehicle seat (seat back)]
FIG. 2 is a rear view of the seat back frame of the vehicle seat 1, and more specifically, the seat back frames 10 and 11 of the left seat back 3 and the center seat back 4 are shown, and the seat back frame 12 of the right seat back 5 is shown. Shows a part of. Further, FIG. 3 is a left side view (partial sectional view) of the seat back of the vehicle seat 1.

Each of the seat backs 3 to 5 includes the seat back frames 10 to 12 shown in the figure, the seat back pads 40 assembled to the seat back frames 10 to 12, and the trim 42 (not shown) that covers the seat back pads 40 from the outside. It is composed of such as.

In the following description, the configurations of the left seat back 3 (seat back frame 10) and the like will be described in detail, and then the configurations of the center seat back 4 and the right seat back 5 will be referred to.

The seat back frame 10 is a frame of the left seat back 3, and has a substantially rectangular shape when viewed from the rear. The seat back frame 10 is mainly a frame main portion 20 arranged along the peripheral edge portion of the left seat back 3, and a specific portion of the frame main portion 20 arranged inside the frame main portion 20. Includes a frame reinforcing portion 22 for connecting the above. The frame main portion 20 is configured by joining a plurality of metal pipe members via a bracket or the like, and the frame reinforcing portion 22 is configured by joining a plurality of metal rod members to each other. Has been done.

Specifically, the frame main portion 20 includes a frame upper side portion 21a extending in the seat width direction at the upper end portion of the left seat back 3, and a pair of left and right frames extending in the vertical direction on the left and right side portions of the left seat back 3. Includes a side side portion 21b and a frame lower side portion 21c extending in the seat width direction at the lower end portion of the left seat back 3.

Support brackets 28 having pins 28a protruding outward along the seat width direction are assembled on the lower corner portion of the frame main portion 20, that is, on the left and right sides of the frame lower side portion 21c. The pin 28a of the left support bracket 28 is rotatably supported by a support bracket (not shown) provided on the inner wall surface of the vehicle body (inner wall surface on the left side), and the support bracket is fixed to the vehicle body. The pin 28a of the support bracket 28 on the right side is rotatably supported by the holding member 14a fixed to the floor portion 7 via the recliner device 15. As a result, the seat back frame 10 and the left seat back 3 can be tilted in the front-rear direction with each pin 28a as a fulcrum. Although not shown in detail, the recliner device 15 enables the angle of the left seat back 3 to be adjusted by operating the lever of the occupant, and is a spring that urges the left seat back 3 toward a specific direction (forward). It is configured to include members and a ratchet mechanism.

A pair of left and right tubular holders 24 that support the headrest 3A by receiving an unexpected support stay provided on the headrest 3A are welded and fixed to the central portion of the frame upper side portion 21a and the front surface thereof. Has been done.

The holder portion 24 includes, for example, a holder main body portion 25a made of a metal tubular body having a rectangular cross section, and a resin cover portion 25b attached to the upper end opening of the holder main body portion 25a. As shown in FIG. 3, in the holder portion 24, only the portion of the cover portion 25b is exposed to the outside of the seat, that is, the outside of the trim 42, and the other portion is hidden inside the left seat back 3.

As shown in FIG. 2, the frame reinforcing portion 22 extends in the vertical direction at a position closer to the right side than the central portion in the seat width direction, specifically, at the position of the holder portion 24 on the right side, and extends in the vertical direction to the upper side portion 21a of the frame and the lower side of the frame. One vertical member portion 23a welded and fixed to the portion 21c, and one vertical member portion 23a extending in the sheet width direction at a plurality of positions in the vertical direction, and welded and fixed to the left and right frame side side portions 21b and the vertical member portion 23a, respectively. Includes a plurality of cross member portions 23b. In a part of the plurality of cross member portions 23b, two cross member portions 23b are integrally formed by bending one metal rod member into a U shape.

The tether mounting portion 3C is provided at a position intermediate between the two holder portions 24 in the seat width direction and slightly downward from the central portion of the seat back frame 10 in the vertical direction.

The tether mounting portion 3C is supported by a main body portion 31 having a rectangular rear view and having a concave portion 31a recessed forward in the central portion, and the main body portion 31 extending in the recess 31a in the seat width direction. It includes an anchor portion 32 made of a metal rod and a decorative cover (not shown) attached to the main body portion 31 from the rear side so as to cover the periphery of the recess 31a.

The tether mounting portion 3C is incorporated in the seat back frame 10 by fixing the main body portion 31 over two cross member portions 23b vertically adjacent to the frame reinforcing portion 22. Then, by attaching the decorative cover to the main body 31 from the outside of the trim 42 or the like, only the portion of the recess 31a including the anchor 32 is exposed to the outside of the seat.

The anchor portion 32 connects the tether belt Tb (see FIG. 3) provided on the child seat mounted on the vehicle seat 1, and the seat back frame 10 is provided with a lateral displacement of the tether belt Tb in the event of a vehicle collision. A belt regulation unit 26 for restraining is further provided.

The belt regulating portion 26 is made of the same metal bar as the metal bar constituting the frame reinforcing portion 22 (vertical member 23a and horizontal member 23b), and the bar is bent in a rectangular wavy shape. It is configured. Specifically, the belt regulation unit 26 connects the left side regulation part 27a and the right side regulation part 27b, each of which is formed by bending a metal rod into an inverted U shape, and the control parts 27a and 27b between them. It has a portion 27c. In this example, the left side regulation part 27a and the right side regulation part 27b correspond to the "belt regulation part" of the present invention, respectively.

The distance between the left side regulation part 27a and the right side regulation part 27b is set to be narrower than the distance between the left and right holder parts 24, and in the belt regulation part 26, the communication part 27c is an intermediate part between both holder parts 24, that is, a tether. It is arranged along the rear surface of the frame upper side portion 21a so as to be located directly above the mounting portion 3C. Therefore, the left side regulating portion 27a and the right side regulating portion 27b protrude into the space inside the left and right holder portions 24.

Further, in the belt regulating portion 26, the left side regulating portion 27a and the right side regulating portion 27b project upward from the frame upper side portion 21a, and more specifically, the upper ends of the left side regulating portion 27a and the right side regulating portion 27b are both holder portions. It is arranged so as to be located near the upper end portion of the holder main body portion 25a of 24 (a position slightly lower than the upper end portion). Then, the left and right ends of the belt regulating portion 26 and the portions of the connecting portion 27c are welded to the frame upper side portion 21a, so that the belt regulating portion 26 is fixed to the frame upper side portion 21a. That is, the left side regulating portion 27a and the right side regulating portion 27b are respectively welded and fixed to the upper side portion 21a of the frame.

As described above, the belt regulating portion 26 is provided so that the upper end portion thereof is located at a position slightly lower than the upper end portion of the holder portion 24. Therefore, the belt regulating portion 26 is as shown in FIG. The entire surface is covered with the seat back pad 40 and the trim 42, and is arranged inside the left seat back 3.

In FIG. 2, reference numeral 29 is a connecting pin provided at the right end of the frame upper side portion 21a of the frame main portion 20. The connecting pin 29 projects to the right from the right side surface of the left seat back 3, and is provided so as to be engaged with the central seat back 4 (seat back frame 11) from the rear side. With this configuration, when the connecting pin 29 and the central seat back 4 (seat back frame 11) are in an engaged state, the left seat back 3 and the central seat back 4 can be tilted integrally, and the engagement can be made. When the state is released, only the central seat back 4 can be tilted independently.

Although the seat back frame 10 of the left seat back 3 has been described above, the seat back frame 12 of the right seat back 5 also has a symmetrical configuration, and the basic configuration is almost the same as that of the seat back frame 10. .. That is, the seat back frame 12 of the right seat back 5 also has the frame main portion 20 arranged along the peripheral edge portion of the right seat back 5 and the frame main portion 20 thereof, similarly to the seat back frame 10 of the left seat back 3. It includes a frame reinforcing portion 22 arranged inside, a pair of left and right holder portions 24, a tether mounting portion 5C, and a belt regulating portion 26. Then, the pin 28a of the right support bracket 28 is rotatably supported by a support bracket (not shown) provided on the inner wall surface (right inner wall surface) of the vehicle body, and the pin 28a of the left support bracket 28 is supported by the pin 28a of the left support bracket 28. Since the holding member 14b fixed to the floor portion 7 is rotatably supported via the recliner device 15, the seat back frame 12 and the right seat back 5 are tilted in the front-rear direction with each pin 28a as a fulcrum. It is possible.

The seat back frame 11 of the central seat back 4 is also arranged inside the frame main portion 20 arranged along the peripheral edge portion of the central seat back 4 and the frame main portion 20 although the specific shape and the like are different. The configuration is common to the seat back frames 10 and 12 of the left and right seat backs 3 and 5 in that the frame reinforcing portion 22 and the pair of left and right holder portions 24 are provided. However, the seat back frame 11 of the central seat back 4 is rotatably supported by the left and right holding members 14a and 14b without the intervention of the recliner device 15, and in this respect, the left and right seat backs 3 and 5 The configuration is different from that of the seat back frames 10 and 12.

[Action effect]
As described above, the vehicle seat 1 is a vehicle seat to which a child seat having a tether belt and conforming to the ISOFIX standard can be attached. Specifically, a pair of left and right connecting metal fittings provided on the lower back surface of the child seat are locked to an anchor (not shown) through the mounting hole 3B of the left seat back 3, and the tether belt Tb is attached as shown in FIG. By connecting the child seat to the tether mounting portion 3C (anchor portion 32) on the back surface via the upper surface portion 45 of the left seat back 3, the child seat can be stably mounted in the area on the left side of the vehicle seat 1. Similarly, the pair of left and right connecting metal fittings of the child seat are locked to the anchor (not shown) through the mounting hole 5B of the right seat back 5, and the tether belt Tb is connected to the back surface via the upper surface 45 of the right seat back 5. By connecting to the tether mounting portion 5C (anchor portion 32), the child seat can be stably mounted in the area on the right side of the vehicle seat 1.

A belt regulating portion 26 for suppressing lateral displacement of the tera belt Tb is provided at the upper ends of the seat back frames 10 and 12 of the left and right seat backs 3 and 5, so that the tether belt is provided in the event of a vehicle collision or the like. It is effectively suppressed that Tb shifts to the left and right. Hereinafter, this point will be described with reference to FIG.

4A and 4B are explanatory views for explaining the lateral displacement suppressing function of the tether belt Tb by the belt regulating portion 26, FIG. 4A shows the positional relationship between the belt regulating portion 26 and the tetherbelt Tb before the vehicle collision, and FIG. 4B shows the vehicle. The positional relationship between the belt regulating unit 26 and the tether belt Tb at the time of a collision is shown.

As described above, the belt restricting portion 26 is provided so that the central connecting portion 27c is located at the intermediate portion between the two holder portions 24, that is, directly above the tether mounting portion 3C (5C), so that the belt collides. In the previous state, as shown in FIGS. 3 and 4A, the tether belt Tb is located between the left side regulating portion 27a and the right side regulating portion 27b of the belt regulating portion 26 along the upper surface portion 45 of the left side seat back 3. Will go through the position of. In other words, it can be said that the left side regulating portion 27a and the right side regulating portion 27b are provided on both the left and right sides of the position where the tether belt Tb is passed. In this case, since the seat back pad 40 is interposed between the left side regulation portion 27a and the right side regulation portion 27b, the tether belt Tb is subjected to the elastic force of the seat back pad 40, so that the tether belt Tb is moved to the left side regulation portion 27a. It is arranged along the upper surface portion 45 of the left seat back 3 with almost no subduction between the right side regulating portion 27b and the right side regulating portion 27b.

When a forward inertial force F acts on the child seat and the tether belt Tb is pulled forward at the time of a vehicle collision (front collision), as shown in FIG. 4 (b), it resists the elastic force of the seat back pad 40. Then, the tether belt Tb sinks between the left side regulation portion 27a and the right side regulation portion 27b, whereby the lateral displacement of the tether belt Tb is regulated by the left side regulation portion 27a and the right side regulation portion 27b.

Therefore, in the event of a vehicle collision, for example, the tether belt Tb moves to the side of the seat back frames 10 and 12 having a relatively low rigidity to deform the seat back frames 10 and 12, and the mounting stability of the child seat is impaired. Is effectively suppressed. In this example, in the left seat back 3 (seat back frame 10), the support bracket 28 on the right side is supported by the holding member 14a via the recliner device 15, while the support bracket 28 on the left side is the inner wall surface of the vehicle body (the seat back frame 10). It is rotatably supported with respect to the right inner wall surface). In such a configuration, it can be said that the load on the left end of the left seat back 3 is small and the rigidity of the left region of the left seat back 3 is low because the recliner device 15 is not interposed. Therefore, if the belt regulating portion 26 is not provided, the inertial force F at the time of a vehicle collision causes the tether belt Tb to be displaced to the left while bending the left region of the left seat back 3 (seat back frame 10) forward. It is conceivable to deform it so as to make it. However, according to the vehicle seat 1, since the belt regulating portion 26 is provided, such a phenomenon is effectively suppressed. Since the right seat back 5 has a symmetrical configuration with the left seat back 3, the right region of the right seat back 5 (seat back frame 12) is bent forward while the tether belt Tb shifts to the right. However, according to the vehicle seat 1, such a phenomenon is similarly suppressed.

Moreover, according to the vehicle seat 1, as described above (FIGS. 3 and 4), the belt regulating portion 26 is covered with the seat back pad 40 and the trim 42, and the entire belt is covered by the left seat back 3 (right seat back). Since it is arranged inside 5), it does not affect the appearance. Therefore, according to the vehicle seat 1, lateral displacement of the tether belt Tb can be suppressed without impairing the design of the left and right seat backs 3 and 5.

Further, the belt regulating portion 26 (left side regulating portion 27a, right side regulating portion 27b) is formed of the same member as the frame reinforcing portion 22, that is, a metal rod material constituting the vertical member portion 23a and the horizontal member portion 23b, and is vertically formed. Like the material portion 23a and the horizontal material portion 23b, it is fixed to the frame main portion 20 (frame upper side portion 21a) by welding. Therefore, according to the vehicle seat 1, there is an advantage that the belt regulating portion 26 having sufficient strength to suppress the lateral displacement of the tether belt Tb can be provided with a relatively simple and inexpensive configuration.

[Modification example, etc.]
The vehicle seat 1 described above is an example of a preferred embodiment of the vehicle seat according to the present invention, and the specific configuration of the vehicle seat 1 can be appropriately changed without departing from the gist of the present invention. is there. For example, the following aspects can also be adopted.

(1) In the embodiment, the belt regulating portion 26 (left side regulating portion 27a, right side regulating portion 27b) is formed as a single component by bending the metal rod in a rectangular wavy shape, and this is welded to the frame main portion 20. It is fixed. However, the belt regulating portion 26 may be integrally provided as a part of other portions. For example, as shown in FIG. 5, a part of the frame reinforcing portion 22, specifically, the belt regulating portion 26 and the vertical portion 26 so as to be continuous with the upper end of the vertical member portion 23a extending in the vertical direction. The material portion 23a and the material portion 23a may be integrally formed of the same rod material. If possible, the belt regulating portion 26 and the cross member portion 23b may be integrally formed of the same bar member.

According to such a configuration, since the belt restricting portion 26 is included in the frame reinforcing portion 22 as a part of the frame reinforcing portion 22 (vertical member portion 23a, horizontal member portion 23b), the belt regulating portion is as in the embodiment. Compared with the case where a dedicated component as 26 is separately assembled to the frame main portion 20, the seat back frames 10 and 12 are easier to assemble, and the burden of managing the components can be suppressed. Therefore, it contributes to the improvement of the productivity of the vehicle seat 1.

Further, in the embodiment, the belt regulation unit 26 includes the left side regulation unit 27a and the right side regulation unit 27b, but the left side regulation unit 27a and the right side regulation unit 27b are separately independent as the belt regulation unit. It may be formed in. In this case as well, the portion of the left side regulating portion 27a may be integrally provided as a part of the frame reinforcing portion 22 or the like, and the portion of the right side regulating portion 27b may be integrally provided as a part of the frame reinforcing portion 22 or the like. ..

(2) The belt regulation unit 26 of the embodiment includes the left side regulation unit 27a and the right side regulation unit 27b, whereby lateral displacement of the tether belt Tb to the left and right sides is suppressed. However, when it is clear that the tether belt Tb tends to shift in the event of a vehicle collision, the belt regulating portion 26 including only the portion corresponding to either the left side regulating portion 27a or the right side regulating portion 27b may be provided. Good.

For example, in the embodiment, as described above, the tether belt Tb tends to shift to the left side for the left seat back 3, and the tether belt Tb tends to shift to the right side for the right seat back 5. Therefore, as shown in FIG. 6, the left seat back 3 may be provided with a belt regulating portion 26 including only a portion corresponding to the left regulating portion 27a of the embodiment of FIG. Although not shown, the right seat back 5 may be provided with a belt regulating portion 26 including only a portion corresponding to the right regulating portion 27b.

Regarding the vehicle seat 1, a connecting metal fitting is provided at the upper end of the frame side side portions 21b of the seat back frames 10 and 12, and the connecting metal fitting can be engaged with and detached from an anchor member provided on the inner wall surface of the vehicle body. It is also possible to adopt a seat structure that locks in. In this case, since the connecting metal fitting is locked to the anchor member, the rigidity of the right region of the left seat back 3 is relatively low, and the rigidity of the left region of the right seat back 5 is relatively low. It becomes low. Therefore, in such a case, the belt regulating unit 26 has a configuration opposite to that shown in FIG. 6, that is, the left seat back 3 corresponds to the right regulating unit 27b of the embodiment of FIG. The belt restricting portion 26 including only the portion to be used may be provided, and the right seat back 5 may be provided with the belt regulating portion 26 consisting of only the portion corresponding to the left side regulating portion 27a.

(3) In the embodiment, as shown in FIG. 2, the belt regulating portion 26 has the left regulating portion 27a and the right regulating portion 27b located behind the left and right holder portions 24 for supporting the headrests 3A and 5A. Further, as shown in FIG. 3, the belt restricting portion 26 is provided so as to be substantially parallel to each holder portion 24. In this case, for example, the left side regulating portion 27a and the right side regulating portion 27b are provided. May be brought into contact with the holder portion 24 from the rear side. In this case, for example, as shown in FIG. 7, it is preferable that the left side regulating portion 27a and the right side regulating portion 27b are curved toward the front and the upper end portion is in contact with each holder portion 24 from the rear side.

According to such a configuration, each holder 24 is supported from the rear side by the left side regulating portion 27a and the right side regulating portion 27b, so that each holder has a rational configuration using the belt regulating portion 26 as a reinforcing member. 24, and by extension, the support strength of the headrests 3A and 5A can be increased. In particular, as shown in FIG. 7, when the left side regulating portion 27a and the right side regulating portion 27b have a curved shape so as to draw an arc toward the front, the belt regulating portion 26 generally has the respective seat backs 3 and 5. It is easy to form a shape that conforms to the appearance shape of the above (shape that conforms to the trim 42). Therefore, there is an advantage that the belt regulating portion 26 can be provided without affecting the appearance shape of each of the seat backs 3 and 5.

(4) In the embodiment, the belt restricting portion 26 (left side regulating portion 27a and right side regulating portion 27b) is formed by bending a metal rod, but is not limited thereto. For example, the belt regulating unit 26 may be a metal plate pressed or a block-shaped metal plate, or may be formed of a resin material as long as the required strength can be secured. ..

(5) In the embodiment, the seat back frame 11 of the central seat back 4 is rotatably supported by the left and right holding members 14a and 14b without the intervention of the recliner device 15, but the present invention is limited to this. It's not a thing. The structure may be such that a recliner is attached and fixed to the central seat. This makes it possible to attach a child seat to the center seat.

1 Vehicle seat 2 Seat cushion 3 Left seat back 3A Headrest 3C Tether mounting part 5 Right seat back 5A Headrest 5C Tether mounting part 10 Seat back frame 12 Seat back frame 20 Frame main part 21a Frame upper side 22 Frame reinforcement 23a Vertical material Part 23b Cross member part 24 Holder part 26 Belt regulation part 27a Left side regulation part (belt regulation part)
27b Right side regulation part (belt regulation part)
32 Anchor part Tb tether belt

Claims (6)

A vehicle seat having a seat back frame, a pad covering the seat back frame, and a trim covering the pad, and to which a child seat having a tether belt can be attached.
The seat back frame is fixed to an upper side portion of the frame which is arranged at the upper end portion and extends in the seat width direction, and at least one of the left and right side positions of the upper side portion of the frame through which the tether belt passes. Equipped with a belt regulation part that suppresses lateral displacement of the tether belt
A vehicle seat characterized in that the belt restricting portion is provided so as to project upward from the upper side portion of the frame, and is entirely covered with the pad and the trim. In the vehicle seat according to claim 1,
The belt regulating portion is a vehicle seat, characterized in that the metal bar is made of a bent material. In the vehicle seat according to claim 2,
The seat back frame includes a frame upper side portion, and is arranged between a frame main portion arranged along the peripheral edge portion of the seat back and a specific portion of the frame main portion arranged inside the frame main portion. Includes a frame reinforcement made of metal rods to connect
A vehicle seat characterized in that the frame reinforcing portion and the belt restricting portion are continuously and integrally formed of the same rod member. In the vehicle seat according to any one of claims 1 to 3,
The seat back includes a headrest and
The seat back frame includes a tubular holder portion that is fixed to the front surface of the upper side portion of the frame and supports the headrest by receiving a supporting stay of the headrest.
A vehicle seat characterized in that the belt restricting portion is fixed to the rear surface of the upper side portion of the frame and is in contact with the holder portion from the rear side. In the vehicle seat according to claim 4,
A vehicle seat characterized in that the belt restricting portion is curved toward the front and an upper end portion is in contact with the holder portion from the rear side. In the vehicle seat according to any one of claims 1 to 5,
The belt restricting portion has an inverted U-shape in front view or rear view of the seat, and both end portions are welded to the upper side portion of the frame.

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