JP2008168847A - Child's seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a child's seat capable of easily fitting a vehicle seat belt to a back section of a seat back and mitigating any damage on a baby in a collision of a vehicle. <P>SOLUTION: The child's seat 10 is placed on a vehicle seat 12 having a vehicle seat belt 11 including a shoulder belt 11a and a lap belt 11b. The child's seat 10 has a receiving base 13, and a seat back 16 having a seat section 14 and a back section 15 on the receiving base 13 which is separable from the receiving base 13 and fixed to the vehicle seat 12 in a backward facing state with respect to the vehicle seat 12. A shoulder belt engagement part 19 is provided above the center of gravity G of the child's seat 10 when a baby B is seated therein out of the back section 15. Further, a temporary engagement part 17 for engaging the shoulder belt 11a and a lap belt engagement part 18 are provided on the receiving base 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a child seat in which the cradle and the seat back can be separated from each other, and in particular, the vehicle seat belt can be easily attached to the back section of the seat back and the damage applied to the infant in the event of a vehicle collision is reduced. It relates to a child seat that can be.

  2. Description of the Related Art Conventionally, there is known a child seat (hereinafter also referred to as a forward / backward child seat) in which a child seat can be placed forward or backward by changing the direction of the child seat back and forth. Such a forward / backward child seat has a relatively large seat back. For this reason, especially when the child seat is mounted rearward, the vehicle seat belt cannot be sufficiently extended, and it is difficult to turn the vehicle seat belt toward the back section of the seat back. Therefore, in the above-mentioned forward / rearward-use child seat, it is a fact that there is no one provided with an engagement portion for engaging the vehicle seat belt in the back section of the seat back.

  Further, there is known a child seat that is a forward / backward child seat in which a cradle and a seat back can be separated from each other (hereinafter also referred to as a cradle separation type child seat). In such a child seat, generally, an engaging portion for engaging the vehicle seat belt is provided only on the cradle. Further, in such a child seat, when the seat back is fixed rearward with respect to the vehicle seat, the pedestal is fixed to the vehicle seat by engaging the vehicle seat belt with the engaging portion of the pedestal, and then the seat back Is attached to the cradle.

  In addition, in the conventional cradle separation type child seat, an attachment mechanism (not shown) for attaching the seat back to the cradle is provided, and separately from the attachment mechanism, the seat back cradle (to the vehicle) ) An adjustment mechanism (not shown) for adjusting the tilt angle is provided.

  That is, the child seat as described above does not have a structure in which the vehicle seat belt is directly engaged with the seat back, and therefore the seat back is not directly held by the vehicle seat belt. Therefore, if the strength of the connecting part that connects the seat back and the cradle is insufficient, when the vehicle collides and a heavy load is applied to the connecting part, the connecting part is damaged and the seat back is removed from the cradle. May come off. For this reason, the connecting portion that connects the seat back and the cradle generally has a structure having high strength.

  Further, in such a child seat, an engagement portion for engaging the vehicle belt is provided in the back section of the seat back, and the vehicle back is engaged with the engagement portion, whereby the seat back is secured to the vehicle seat. Fixing backwards is also conceivable. However, when the engaging portion is provided below the center of gravity when the baby rides, the seat back may rotate in the traveling direction of the vehicle when the vehicle collides. That is, the seat back rotates in the direction in which the back section of the seat back is in the horizontal direction (in the traveling direction of the vehicle), and the infant on the seat back is also in the horizontal direction. In this case, the infant cannot receive the impact caused by the collision of the vehicle with his / her back, and may be seriously damaged.

  Further, conventionally, in a forward / backward child seat, when the seat back is fixed rearward with respect to the vehicle seat on the cradle, the portion of the cradle that contacts the seat surface of the vehicle seat is often flat. . For this reason, there are many cases where the angle of the seat back with respect to the vehicle seat cannot be adjusted flexibly. In addition, there is a conventional forward / backward child seat that can reverse the cradle back and forth in response to forward or backward use. In this case, since it is necessary to operate the angle adjusting component in conjunction with reversing the cradle back and forth, the work of reversing the cradle back and forth is complicated and the angle adjusting component may be erroneously operated.

  Further, in the conventional cradle separation type child seat, as described above, the adjustment mechanism for adjusting the inclination angle of the seat back with respect to the cradle is provided separately from the attachment mechanism for attaching the seat back to the cradle. Yes. For this reason, the cost for manufacturing the adjusting mechanism is required, and a space for providing the adjusting mechanism is required, and the weight is increased by the amount of the adjusting mechanism.

  The present invention has been made in consideration of such points, and the vehicle seat belt can be easily attached to the back section of the seat back, reducing the load on the connecting portion connecting the seat back and the cradle. In addition, an object of the present invention is to provide a child seat that can alleviate damage to an infant in the event of a vehicle collision.

  The present invention relates to a child seat placed on a vehicle seat having a vehicle seat belt including a shoulder belt and a lap belt, and a pedestal placed on the vehicle seat and separable from the pedestal on the pedestal. A seat back having a seat section and a back section, the seat back being above the center of gravity of the child seat when an infant is on the back section of the seat back A shoulder belt engaging portion for engaging the shoulder belt, a temporary engaging portion for engaging the shoulder belt with the cradle, and a lap belt engaging portion for engaging the lap belt with the cradle. It is the child seat characterized by the above.

  According to the present invention, when the seat back is fixed rearward with respect to the vehicle seat on the cradle, a portion of the cradle that contacts the vehicle seat surface is curved along the traveling direction of the vehicle. It is a characteristic child seat.

  The present invention is a child seat characterized in that the seat back can be fixed forward with respect to the vehicle seat on the cradle.

  The present invention provides a child seat characterized in that when the seat back is fixed to the vehicle seat in a forward-facing state with respect to the vehicle seat, a portion of the cradle that contacts the vehicle seat surface is a flat surface. It is.

  According to the present invention, in the back section of the seat back, the shoulder belt engaging portion for engaging the shoulder belt is provided above the center of gravity of the child seat when the baby rides. It is possible to reduce the load on the connection portion connecting the two. In addition, in the event of a vehicle collision, the back section of the seat back rises, thereby reducing damage to the infant.

  Further, according to the present invention, since the temporary engagement portion for engaging the shoulder belt is provided on the cradle, the vehicle seat belt can be easily attached to the back section of the seat back.

  Furthermore, according to the present invention, when the seat back is fixed rearward to the vehicle seat on the cradle, the portion of the cradle that contacts the vehicle seat surface is curved along the traveling direction of the vehicle. So, in the event of a vehicle collision, the back section of the seat back stands up easily.

  Furthermore, according to the present invention, since the seat back can be fixed forward with respect to the vehicle seat on the cradle, the child seat can be used appropriately in accordance with the child's growth stage. .

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is a side view showing an embodiment of the present invention. FIG. 2 is a side view showing a state in which the seat back is fixed forward with respect to the vehicle seat on the cradle. FIG. 3A is an enlarged view of the rear lever, and FIG. 3B is an enlarged view around the first hole and the second hole. FIG. 3C is a perspective view showing an attachment state of the seat back and the cradle when the seat back is fixed to the vehicle seat in a rearward state on the cradle. ) Is an enlarged view of the front lever. 4 (a) is an enlarged view of the front lever, and FIG. 4 (b) is an enlarged view of the periphery of the locking hole. FIG. 4C is a perspective view showing an attachment state of the seat back and the cradle when the seat back is fixed to the vehicle seat in a forward-facing state on the cradle. ) Is an enlarged view of the hook, and FIG. 4E is an enlarged view of the connection shaft. 5A, 5B, and 5C are perspective views showing a method of fixing the child seat in a rearward state with respect to the vehicle seat, and FIG. 6 shows a state in which the child seat is forward facing the vehicle seat. It is a perspective view which shows the method to fix with. FIG. 7 is a side view showing the action at the time of collision of the child seat according to the present embodiment. FIG. 8A is a perspective view showing the rear lever 24 in a state where it is not pulled. FIG. 8B is a plan view showing the rear lever 24 in a state where it is not pulled. FIG. 9A is a perspective view showing the rear lever 24 in a pulled state. FIG. 9B is a plan view showing the rear lever 24 in a pulled state. FIG. 10A is a perspective view showing the front lever 23 in a state where it is not pulled. FIG. 10B is a plan view showing the front lever 23 in a state where it is not pulled. FIG. 11A is a perspective view showing the front lever 23 in a pulled state. FIG. 11B is a plan view showing the front lever 23 in a pulled state. FIG. 12 is a side sectional view showing the relationship between the locking hole 30 and the connection shaft 32.

First, the outline of the child seat according to the present embodiment will be described with reference to FIGS.
As shown in FIG. 1, the child seat 10 is placed on a vehicle seat 12 having a vehicle seat belt 11 including a shoulder belt 11a and a lap belt 11b. The child seat 10 is mounted on the vehicle seat 12, and is fixed to the vehicle seat 12 in a rearward state on the pedestal 13 so as to be separable from the pedestal 13 and to the vehicle seat 12. A seat back 16 having a section 14 and a back section 15 is provided.

  Of the back section 15 of the seat back 16, a shoulder belt engaging portion 19 that engages the shoulder belt 11a is provided above the center of gravity G of the child seat 10 when the baby B rides. Here, the center of gravity G of the child seat 10 when the baby B rides refers to the center of gravity G of the combined product when the child seat 10 and the baby B are combined.

  Further, as shown in FIG. 1, the seat back 16 is fixed on the pedestal 13 in a rearward state with respect to the vehicle seat 12, and in this case, a curved portion 13 a of the pedestal 13, which will be described later, is provided on the vehicle seat 12. It is on the seat surface 12 a and the flat portion 13 b of the cradle 13 is on the back surface 12 b side of the vehicle seat 12. In this case, the temporary engagement part 17 is provided in the upper part of the curved part 13a provided in the seat surface 12a side of the vehicle seat 12 among the cradle 13. The temporary engagement portion 17 is for temporarily engaging the shoulder belt 11a when the seat back 16 is attached to the cradle 13. Further, when the seat back 16 is fixed on the cradle 13 in a rearward state with respect to the vehicle seat 12, the cradle 13 is provided near the flat portion 13 b provided on the back surface 12 b side of the vehicle seat 12. 13 is provided with a lap belt engaging portion 18 for engaging the lap belt 11b.

  Further, as shown in FIG. 1, when the seat back 16 is fixed rearward with respect to the vehicle seat 12 on the cradle 13, a portion 13 a (hereinafter referred to as “abutment”) of the cradle 13 that contacts the seat surface 12 a of the vehicle seat 12. , Also referred to as a curved portion) is curved along the traveling direction of the vehicle (the left direction in FIG. 1) as described above.

  Next, referring to FIGS. 3A, 3B, 3C, and 3D, the seat back 16 in the case where the seat back 16 is fixed to the vehicle seat 12 in a rearward state on the cradle 13. The means for fixing the cradle 13 to each other will be described in more detail.

  As shown in FIG. 3C, a first pin 21 that protrudes to the left and right with respect to the vehicle traveling direction is provided on the lower surface of the front end side of the seat section 14 of the seat back 16. The first pin 21 is interlocked with a front lever 23 provided on the upper surface of the seat section 14 (see FIG. 3D). That is, when the front lever 23 is not pulled, the first pin 21 protrudes from the seat section 14 to the left and right orthogonal to the vehicle traveling direction. When the front lever 23 is pulled, the first pin 21 is pulled inside the seat section 14.

  A second pin 22 is provided on the lower surface of the boundary portion between the seat section 14 and the back section 15 of the seat back 16 so as to protrude left and right with respect to the vehicle traveling direction. The second pin 22 is interlocked with a rear lever 24 provided on the back surface of the seat section 14 (see FIG. 3A). That is, when the rear lever 24 is not pulled, the second pin 22 protrudes from the seat section 14 to the left and right orthogonal to the vehicle traveling direction. When the rear lever 24 is pulled, the second pin 22 is pulled inside the seat section 14.

  Further, as shown in FIGS. 3B and 3C, a first hole 25 capable of locking the first pin 21 described above on the cradle 13 and a first inclination extending upward from the first hole 25. One portion is provided on each of the right and left sides. In addition, a second hole 26 that can lock the above-described second pin 22 and a second inclined portion 27 that extends upward from the second hole 26 are provided on the cradle 13 at one place on each side. Yes.

  By the way, as shown in FIG. 2, the seat back 16 can be fixed forward with respect to the vehicle seat 12 on the cradle 13. In this case, the cradle 13 is disposed in the opposite direction to the traveling direction of the vehicle as compared with the case where the cradle 13 is fixed in a rearward direction with respect to the vehicle seat 12 (see FIG. 1). That is, the curved portion 13 a of the cradle 13 is on the back surface 12 b side of the vehicle seat 12, and the flat portion 13 b of the cradle 13 is on the seat surface 12 a of the vehicle seat 12. In this case, a guide portion 20 is provided on the pedestal 13 so that the lap belt 11b is stretched over the flat portion 13b. The seat back 16 is attached to the vehicle seat 12 by the lap belt 11b spanned on the guide portion 20. The vehicle seat 12 is fixed to the vehicle seat 12 by a shoulder belt 11a that is secured to the temporary engagement portion 17 on the back surface 12b side of the vehicle seat 12.

  Further, when the seat back 16 is fixed on the pedestal 13 in a forward-facing state with respect to the vehicle seat 12, a portion 13 b (hereinafter referred to as a flat surface) of the pedestal 13 that contacts the seat surface 12 a of the vehicle seat 12. Is also a flat surface as described above.

  Next, the seat when the seat back 16 is fixed to the vehicle seat 12 in a forward-facing state on the cradle 13 using FIGS. 4 (a) (b) (c) (d) (e). The means for fixing the back 16 and the cradle 13 to each other will be described in more detail.

  As described above, the first pin 21 is provided on the lower surface of the front end side of the seat section 14 of the seat back 16 so as to protrude left and right with respect to the vehicle traveling direction (see FIG. 4C). As described above, the first pin 21 is interlocked with the front lever 23 provided on the upper surface of the seat section 14 (see FIG. 4A). Moreover, the hook 29 which protrudes in the base 13 side is provided in the back surface of the back part 15 of the seat part section 14 (refer FIG.4 (c) (d)).

  Further, as shown in FIG. 4 (b), on both side surfaces of one side end portion (on the flat portion 13b side end portion) of the cradle 13, a locking hole portion 30 to be locked to the first pin 21 and this engagement are provided. A third inclined portion 31 extending upward from the blind hole portion 30 is provided. Each locking hole 30 includes a plurality of locking holes 30a, 30b, and 30c. Specifically, the standing hole 30a positioned below, the intermediate hole 30b positioned at the center, and the bed positioned above. A positioning hole 30c. Further, as shown in FIG. 4C, when the seatback 16 is tilted inside the cradle 13 to change the tilt angle inside the cradle 13 (described later), a guide for guiding the second pin 22. A mechanism 33 is provided. Further, as shown in FIGS. 4C and 4E, a connection shaft 32 (support shaft 32) for hooking the hook 29 is provided at the other side end of the cradle 13.

  Further, as shown in FIGS. 5 (a), 5 (b), 5 (c) and FIG. 6, the seat back 16 is in a forward-facing state (see FIG. 6) or a backward-facing state (FIG. 5 (a) ( (b) (see (c)).

  Further, as shown in FIGS. 4C, 4D, and 4E, a connection shaft 32 is provided on the back portion of the cradle 13, and is engaged with the connection shaft 32 of the cradle 13 on the rear rear surface of the seat back 16. A hook 29 is provided, and the hook 29 engages with the connection shaft 32, whereby the seat back 16 swings around the connection shaft 32 with respect to the cradle 13.

  Further, as shown in FIG. 4C, a first pin 21 is provided at the lower front portion of the seat section 14 of the seat back 16. As shown in FIG. 4C, when the seat back 16 is placed in a forward-facing state with respect to the vehicle seat 12, the seat back 16 is fixed to the cradle 13 at a plurality of inclined positions. As described above, the receiving base 13 is provided with a locking hole 30 (the standing hole 30a, the intermediate hole 30b, and the sleeping hole 30c) with which the first pin 21 of the seat back 16 is engaged.

  As shown in FIGS. 4B and 4C, when the seat back 16 is placed in a forward-facing state with respect to the vehicle seat 12, the cradle 13 moves the first pin 21 to each locking hole. 30 has a third inclined portion 31 leading to 30 (standing hole 30a, intermediate hole 30b and sleeping hole 30c).

  3B and 3C, the cradle 13 is engaged with the first pin 21 of the seat back 16 when the seat back 16 is placed in a rearward state with respect to the vehicle seat 12. A first hole 25 is provided.

  3B and 3C, the cradle 13 is engaged with the second pin 22 of the seat back 16 when the seat back 16 is placed in a rearward state with respect to the vehicle seat 12. A second hole 26 is provided.

  Further, as shown in FIGS. 3B and 3C, the cradle 13 moves the first pin 21 to the first hole 25 when the seat back 16 is placed in a rearward state with respect to the vehicle seat 12. The first inclined portion 28 for guiding and the second inclined portion 27 for guiding the second pin 22 to the second hole 26 are provided.

  Further, the first pin 21 can freely protrude from the seat back 16. That is, as described above, the first pin 21 is interlocked with the front lever 23 (see FIG. 3D) provided on the upper surface of the seat section 14. When the front lever 23 is not pulled, the first pin 21 protrudes from the seat section 14 of the seat back 16 to the left and right orthogonal to the vehicle traveling direction, and when the front lever 23 is pulled, the first pin 21 is drawn inside the seat section 14 of the seat back 16.

  Specifically, as shown in FIGS. 10A and 10B and FIGS. 11A and 11B, each of the first pins 21 is provided with a protruding portion 21a extending to the front lever 23 side. The projecting portion 21 a is inserted movably in an inclined elongated hole 41 provided in the front lever 23. Further, the front lever 23 is provided with a pair of parallel elongated holes 42 extending in a direction parallel to the operation direction of the front lever 23, and the parallel elongated holes 42 project from the front lever 23 and the seat back 16. A spring 53 disposed between the rod 51 and the rod 51 is disposed.

  Therefore, as shown in FIGS. 10A and 10B, when the front lever 23 is not pulled, the front lever 23 is in the initial position by the biasing force of the spring 53, and the first pin 21 is in the vehicle traveling direction. It protrudes from the seat section 14 of the seat back 16 to the left and right orthogonal to the side. On the other hand, as shown in FIGS. 11A and 11B, when the rear lever 24 is pulled against the urging force of the spring 53 (when moved in the direction of arrow A3 in FIG. 10A), The 1 pin 21 is drawn inside the seat section 14 of the seat back 16 (moves in the direction of arrow A4 in FIG. 10A).

  By the way, in FIGS. 10A, 10B and 11A, 11B, when a force is applied from the outside to the first pin 21 in the direction of arrow A4, the front lever 23 is not pulled in the direction of arrow A3. Even so, the first pin 21 is pulled inside the seat section 14 of the seat back 16.

  Further, in FIG. 3C, the second pin 22 can freely protrude from the seat back 16. That is, as described above, when the rear lever 24 is not pulled, the second pin 22 protrudes from the seat back 16 to the left and right orthogonal to the vehicle traveling direction, and the rear lever 24 is pulled. In this case, the second pin 22 is drawn inside the seat back 16.

  Specifically, as shown in FIGS. 8A and 8B and FIGS. 9A and 9B, each of the second pins 22 is connected to one end of an L-shaped connecting portion 61. The other end of the L-shaped connecting portion 61 is connected at the center position in the width direction of the rear lever 24. A spring 63 is disposed between the rear lever 24 and the seat back 16.

  Therefore, as shown in FIGS. 8A and 8B, when the rear lever 24 is not pulled, the rear lever 24 is in the initial position by the urging force of the spring 63, and the second pin 22 moves in the vehicle. It protrudes from the seat back 16 to the left and right orthogonal to the direction. On the other hand, as shown in FIGS. 9A and 9B, when the rear lever 24 is pulled against the urging force of the spring 63 (when moved in the direction of arrow A1 in FIG. 8A), The 2-pin 22 is drawn inside the seat back 16 (moves in the direction of arrow A2 in FIG. 8A). At this time, a biasing force is applied to the rear lever 24 by the spring 63.

  By the way, in FIGS. 8A, 8B and 9A, 9B, if a force is applied to the second pin 22 from the outside in the direction of the arrow A2, it is not necessary to pull the front lever 23 in the direction of the arrow A1. The second pin 22 is pulled inside the seat back 16.

  In addition, as shown in FIG. 12, each of the locking holes 30 (the standing hole 30a, the intermediate hole 30b, and the sleeping hole 30c) has the connection shaft 32 as the center when the cradle 13 is viewed from the side. Are arranged on the circumference of the radius R. FIG. 12 is a side sectional view showing the relationship between the locking hole 30 and the connection shaft 32 as described above.

Next, the operation of the present embodiment having such a configuration will be described.
(Reverse mounting method)
First, a method of fixing the child seat 10 to the vehicle seat 12 in a rearward state will be described with reference to FIGS. 3C and 5A, 5B, and 5C.

  First, as shown in FIG. 5A, the cradle 13 is fixed to the vehicle seat 12. In this case, first, the lap belt 11 b of the vehicle seat belt 11 is engaged with the lap belt engaging portion 18. Next, the shoulder belt 11 a of the vehicle seat belt 11 is extended, and the shoulder belt 11 a is temporarily engaged with the temporary engagement portion 17.

  In this case, the curved portion 13 a of the cradle 13 is on the seat surface 12 a of the vehicle seat 12, and the flat portion 13 b of the cradle 13 is on the back surface 12 b side of the vehicle seat 12.

  Next, as shown in FIGS. 3C and 5B, the seat back 16 is fixed on the receiving base 13 in a rearward state with respect to the vehicle seat 12. In this case, the seat back 16 is first placed on the cradle 13 from above the cradle 13, and the first pin 21 is locked in the first hole 25 and the second pin 22 is locked in the second hole 26. In this case, as described above, the first inclined portion 28 is provided above the first hole 25, and the second inclined portion 27 is provided above the second hole 26. The first pin 21 can protrude from the seat section 14 of the seat back 16, and the second pin 22 can protrude from the boundary portion between the seat section 14 and the back section 15 of the seat back 16. (See FIGS. 8A and 8B to FIGS. 11A and 11B). For this reason, simply by pushing the seat back 16 from above onto the cradle 13, the first pin 21 projecting outward in advance slides on the first inclined portion 28 and is inserted into the first hole 25, and The 2 pin 22 slides on the second inclined portion 27 and is inserted into the second hole 26. As a result, the seat back 16 can be easily fixed on the cradle 13.

  Next, as shown in FIG. 5 (c), the shoulder belt 11 a temporarily engaged with the temporary engagement portion 17 is detached from the temporary engagement portion 17, and then the shoulder belt 11 a is engaged with the shoulder belt engagement portion 19. Combine.

  Next, the inclination angle of the child seat 10 with respect to the vehicle seat 12 is adjusted. That is, on the seating surface 12a of the vehicle seat 12, the cradle 13 is swung around the curved portion 13a to change the inclination of the cradle 13, whereby the seat back 16 on which the infant B is placed is placed on the vehicle seat 12. The tilt angle can be adjusted. As described above, since the curved portion 13a is curved along the traveling direction of the vehicle, the inclination angle of the child seat 10 can be easily adjusted.

  When removing the seat back 16 from the cradle 13, the seat back 16 is lifted from the cradle 13 while simultaneously pulling the front lever 23 and the rear lever 24. At this time, the first pin 21 and the second pin 22 are respectively pulled inward by the front lever 23 and the rear lever 24, whereby the engagement between the first pin 21 and the first hole 25 and the second pin 22, respectively. And the second hole 26 can be disengaged. In this way, the seat back 16 can be removed from the cradle 13.

(Positive fixing method)
Next, a method for fixing the child seat 10 to the vehicle seat 12 in a forward-facing state will be described with reference to FIG.

  First, as shown in FIG. 6, the cradle 13 is fixed to the vehicle seat 12. In this case, the lap belt 11 b of the vehicle seat belt 11 is engaged with the guide portion 20. Further, the shoulder belt 11 a of the vehicle seat belt 11 is disposed obliquely on the cradle 13 on the back surface 12 b side of the vehicle seat 12.

  In this case, the curved portion 13 a of the cradle 13 is on the back surface 12 b side of the vehicle seat 12, and the flat portion 13 b of the cradle 13 is on the seat surface 12 a of the vehicle seat 12.

  Next, the seat back 16 is fixed on the cradle 13 in a forward-facing state with respect to the vehicle seat 12. In this case, the seat back 16 is placed on the cradle 13 from above, the hook 29 is hooked on the connection shaft 32, and the first pin 21 is slid along the third inclined portion 31 to form the locking hole 30. Bring up to the standing hole 30a and lock it.

  Here, the first pin 21 can freely protrude from the seat section 14 of the seat back 16 (see FIGS. 10A and 10B and FIGS. 11A and 11B), and the cradle 13 is the first pin. It has the 3rd inclination part 31 which guides 21 to each locking hole part 30 (refer FIG.4 (b) (c)). For this reason, when the seat back 16 is placed in a forward-facing state with respect to the vehicle seat 12 as described above, the first pin 21 that protrudes outward in advance only by pushing the seat back 16 onto the cradle 13 from above. Slides on the third inclined portion 31 and is inserted into the standing hole 30 a of the locking hole portion 30. As a result, the seat back 16 can be easily fixed on the cradle 13.

  Next, the inclination angle of the seat back 16 with respect to the cradle 13 is adjusted. In this case, first, the front lever 23 is pulled and the first pin 21 is pulled inward to release the locking with the standing hole 30a. Next, in this state, by pulling the seat back 16 toward the front side (vehicle traveling direction side), the seat back 16 is swung around the hook 29 in the cradle 13, and the first pin 21 is moved to the intermediate hole 30b. Alternatively, it is locked in the sleeping hole 30c. At this time, the second pin 22 is guided along the guide mechanism 33. In this manner, the seat back 16 is swung around the hook 29 in the cradle 13 and the first pin 21 is locked to the standing hole 30a, the intermediate hole 30b, or the sleeping hole 30c. The inclination angle of the seat back 16 with respect to the table 13 can be adjusted in three stages.

  Therefore, the seat back 16 can be held at a preferred angle with respect to the cradle 13 (and thus the vehicle seat 12). That is, when the infant wants to sit on the child seat 10 in a standing position, the first pin 21 is inserted into the standing hole 30a arranged at the lowermost position, and the infant sits on the child seat 10 in the sleeping position. If desired, the first pin 21 is inserted into the sleeping hole 30c arranged at the uppermost position. Further, when the baby is to be seated on the child seat 10 between the standing position and the sleeping position, the first pin 21 is inserted into the intermediate hole 30b between the standing hole 30a and the sleeping position 30c. Insert it.

  Further, as shown in FIG. 12, each locking hole 30 (standing hole 30a, intermediate hole 30b, sleeping hole 30c) of the cradle 13 is centered on the connection shaft 32 when viewed from the side. It is arranged on the circumference of radius R. For this reason, the hook 29 of the seat back 16 and the connection shaft 32 of the cradle 13 are engaged even when the first pin 21 is engaged with any of the standing hole 30a, the intermediate hole 30b, and the sleeping hole 30c. A gap is not formed between the hook 29 and the connecting shaft 32. As a result, the seat back 16 can be prevented from rattling with respect to the cradle 13, and the seat back 16 can be firmly and stably installed with respect to the cradle 13.

  A case where the seat back 16 is removed from the cradle 13 will be described. In this case, it is assumed that the first pin 21 is locked in the standing hole 30a. In this state, the front lever 23 is pulled. Thereby, the 1st pin 21 is drawn inside and the latching with the standing hole 30a is cancelled | released. Next, the seat 29 is lifted from the cradle 13 so that the hook 29 is detached from the connection shaft 32. In this way, the seat back 16 can be removed from the cradle 13.

  As described above, the first pin 21 is not only used for fixing the seat back 16 to the cradle 13, but also when the child seat 10 is fixed to the vehicle seat 12 in a forward-facing state. It is also used to adjust the inclination angle of the seat back 16 with respect to.

  That is, according to the present embodiment, the seat back 16 can be fixed to the cradle 13 and the inclination angle of the seat back 16 with respect to the cradle 13 can be adjusted by one member (first pin 21). For this reason, unlike the prior art, there is no need to provide an adjustment mechanism for adjusting the inclination angle of the seat back 16 with respect to the cradle 13 separately from the attachment mechanism for fixing the seat back 16 to the cradle 13, thereby reducing the manufacturing cost of the child seat 10. The child seat 10 can be made compact and light in weight.

(Action at the time of collision)
Next, the action at the time of a collision when the seat back 16 is fixed in a rearward state with respect to the vehicle seat 12 will be described with reference to FIG.

  It is assumed that the vehicle collides when the seat back 16 is fixed in a rearward state with respect to the vehicle seat 12. In this case, as described above, the shoulder belt engaging portion 19 that engages the shoulder belt 11a is provided in the back section 15 of the seat back 16 above the center of gravity G of the child seat 10 when the baby B rides. ing. Further, the curved portion 13a of the cradle 13 is curved along the traveling direction of the vehicle.

  Accordingly, as shown in FIG. 7, the cradle 13 and the seat back 16 rotate about the shoulder belt engaging portion 19, and at the same time, the curved portion 13 a of the cradle 13 slides on the seat surface 12 a of the vehicle seat 12. To do. That is, when the vehicle collides, the cradle 13 is held by the shoulder belt 11a via the shoulder belt engaging portion 19, so that the cradle 13 and the seat back 16 move in the traveling direction of the vehicle as shown in FIG. Rotate in the direction of the arrow (clockwise). As a result, the back section 15 of the seat back 16 rises, so that the infant B can receive an impact on his / her back, and the damage applied to the infant B can be reduced.

  Thus, according to the present embodiment, the shoulder belt engaging portion that engages the shoulder belt 11a in the back section 15 of the seat back 16 above the center of gravity G of the child seat 10 when the baby B rides. 19 is provided, so that the load on the connecting portion (the first pin 21, the first hole 25, the second pin 22, and the second hole 26) that connects the seat back 16 and the cradle 13 is reduced. Can do. Further, in the event of a vehicle collision, the back section 15 of the seat back 16 rises, thereby reducing the damage applied to the infant B.

  Further, according to the present embodiment, the temporary engagement portion 17 that engages the shoulder belt 11 a is provided on the cradle 13, so that the vehicle seat belt 11 can be easily attached to the back section 15 of the seat back 16. Can do.

  Furthermore, according to the present embodiment, when the seat back 16 is fixed rearward to the vehicle seat 12 on the cradle 13, the portion of the cradle 13 that comes into contact with the seat surface 12 a of the vehicle seat 12 (curved portion). Since 13a is curved along the traveling direction of the vehicle, the back section 15 of the seat back 16 easily stands up in the event of a vehicle collision.

  Furthermore, according to the present embodiment, the seat back 16 can be fixed forward with respect to the vehicle seat 12 on the cradle 13, so that the child seat 10 can be appropriately adjusted in accordance with the growth stage of the child. Can be used for

  Furthermore, according to the present embodiment, when the seat back 16 is fixed rearward to the vehicle seat 12 on the cradle 13, a portion of the cradle 13 that comes into contact with the seat surface 12 a of the vehicle seat 12 (curved portion). ) 13a is curved along the traveling direction of the vehicle, the angle of the seat back 16 relative to the vehicle seat 12 can be easily adjusted.

  In the above-described embodiment, the description has been given using the locking hole portion 30 including the plurality of locking holes 30a, 30b, and 30c as the locking portion. If the first pin 21 is locked, the locking portion can be used.

The side view which shows one Embodiment of the child seat by this invention. The side view which shows the state in which the seat back was fixed forward with respect to the vehicle seat on the cradle. The figure which shows the attachment means of a seat back and a pedestal in case a seat back is fixed in the state facing backward with respect to a vehicle seat on a cradle. The figure which shows the attachment means of a seat back and a receiving stand in case a seat back is fixed in the state facing forward with respect to a vehicle seat on a receiving stand. The perspective view which shows the method of fixing a child seat in the state facing backward with respect to a vehicle seat. The perspective view which shows the method of fixing a child seat in the state facing forward with respect to a vehicle seat. The side view which shows the effect | action at the time of the collision of the child seat by this invention. The block diagram which showed the rear side lever of the state which has not pulled the child seat by this invention. The block diagram which showed the rear side lever of the state which pulled the child seat by this invention. The block diagram which showed the front side lever of the state which has not pulled the child seat by this invention. The block diagram which showed the front side lever of the state which pulled the child seat by this invention. Side sectional drawing which shows the relationship between the latching hole part of the child seat by this invention, and a connection shaft (support axis).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Child seat 11 Vehicle seat belt 11a Shoulder belt 11b Lap belt 12 Vehicle seat 12a Seat surface 12b Back surface 13 Receiving base 13a Curved portion 13b Flat portion 14 Seat section 15 Back section 16 Seat back 17 Temporary engagement portion 18 Lap belt engagement portion 19 shoulder belt engaging portion 20 guide portion 21 first pin 22 second pin 23 front lever 24 rear lever 25 first hole 26 second hole 27 second inclined portion 28 first inclined portion 29 hook 30 locking hole portion ( Locking part)
30a Standing hole 30b Intermediate hole 30c Sleeping hole 31 Third inclined part 32 Connection shaft (support shaft)
33 Guide mechanism

Claims (4)

In a child seat placed on a vehicle seat having a vehicle seat belt including a shoulder belt and a lap belt,
A cradle mounted on a vehicle seat;
A seat back having a seat section and a back section is provided on the cradle and is separable from the cradle and fixed in a rearward state with respect to the vehicle seat.
Of the back section of the seat back, a shoulder belt engagement portion that engages the shoulder belt is provided above the center of gravity of the child seat when the baby rides,
A temporary engagement part for engaging the shoulder belt to the cradle is provided,
A child seat in which a lap belt engaging portion for engaging a lap belt is provided on a cradle.   When the seat back is fixed rearward with respect to the vehicle seat on the cradle, a portion of the cradle that contacts the vehicle seat surface is curved along the traveling direction of the vehicle. Item 1. The child seat according to item 1.   The child seat according to claim 1 or 2, wherein the seat back can be fixed forward with respect to the vehicle seat on the cradle.   The portion of the cradle that is in contact with the seat surface of the vehicle is a flat surface when the seat back is fixed on the cradle with the vehicle seat facing forward. Child seat.

Images