JP6203270B2 - child seat - Google Patents

Description

  The present invention relates to a child seat attached to a vehicle seat.

  A child seat that is used when an infant is placed on a passenger car or the like, and has a pedestal that is attached to a seat of a vehicle (for example, an automobile) and a seat body that is slidably supported on the pedestal, is known. (Patent Document 1).

  The child seat described in Patent Document 1 is a seat belt type child seat that uses a seat belt of a seat belt device provided in a vehicle seat for fixing to the vehicle seat. That is, the child seat cradle has an upright portion that faces the back of the vehicle seat, and the upright portion has two lock-off devices for holding the seat belt. The lock-off device is disposed on the left and right sides of the front surface of the standing portion of the cradle, and can use a seat belt disposed on either the left or right side of the child seat. The child seat is firmly attached to the vehicle seat by a seat belt stretched so as to pass through the front surface of the upright portion being sandwiched and fixed by a lock-off device.

  Incidentally, in addition to the seat belt type child seat, an ISOFIX type child seat manufactured in conformity with the ISOFIX or ISO-FIX (Isofix) standard is also known. The ISOFIX type child seat has an arm member and a connecting member attached to the tip of the arm member. The arm member protrudes toward the rear of the child seat, and can be retracted into the child seat, for example, the cradle. On the other hand, a vehicle seat for fixing an ISOFIX type child seat has an anchor member, and the connecting member of the child seat is configured to be connected to or disconnected from the anchor member.

JP 2010-012895 A

  As described above, there are two child seats, the seat belt type and the ISOFIX type, depending on the method of fixing the vehicle seat to the vehicle seat. However, conventionally, in these two types of child seats, the seat body and the cradle are designed and manufactured for each type, and there has been no idea of sharing them. For example, the child seat described in Patent Document 1 has a complicated link mechanism inside the cradle including the standing portion in order to make the seat body recline and rotate with respect to the cradle. One reason is that it has been difficult to arrange an arm member that can be retracted into the interior of the cradle.

  Since the seat body and cradle of the two types of child seats cannot be shared, the number of parts and the manufacturing process increase, and it becomes difficult to adjust the schedule of the assembly line, resulting in an increase in manufacturing cost. There was a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to reduce manufacturing costs by sharing parts of a seat belt type and an ISOFIX type in a child seat.

  According to one aspect of the present invention, one of a first cradle having a clamping mechanism capable of clamping a vehicle seat belt and a second cradle having a coupling mechanism connectable to an anchor member of the vehicle. And a seat body configured to be slidably supported on the first cradle and the second cradle.

  According to another aspect of the present invention, the clamping mechanism is disposed outside the first cradle, and the coupling mechanism is disposed inside the second cradle. A child seat is provided.

  According to another aspect of the present invention, there is provided a child seat in which the coupling mechanism has a rod-shaped arm member that can protrude rearward from the second receiving base.

  Moreover, according to another aspect of the present invention, there is provided a child seat in which the coupling mechanism has a pair of left and right arm members.

  According to another aspect of the present invention, the seat body is supported on the cradle so as to be changeable between a plurality of reclining positions having different inclination angles, and is rotatable at each of the reclining positions. A child seat is provided which is supported on a cradle.

  Further, according to another aspect of the present invention, the seat body protrudes toward and away from the cradle and engages or disengages from the cradle. A rotation lock member that protrudes so as to be able to advance and retreat, and engages or disengages with respect to the cradle. When the seat body is rotated, the child seat is provided in which the rotation lock member is disengaged from the cradle.

  According to another aspect of the present invention, the cradle has an engaging portion, the seat body has an engaged portion that engages with the engaging portion, and the reclining position of the seat body. A child seat is provided in which the engagement between the engaging portion and the engaged portion is maintained when the seat is changed and the seat body is rotated.

  According to another aspect of the present invention, there is provided a child seat characterized in that the engaged portion is formed in an annular shape or a disk shape around the rotation axis of the seat body.

  According to another aspect of the present invention, there is provided a child seat in which the engaging portion is a connecting member that connects the upper engaged portion and the lower engaged portion.

  According to another aspect of the present invention, there is provided a child seat characterized in that the engaging portion moves in the front-rear direction following the change in the reclining position of the seat body.

  According to another aspect of the present invention, there is provided a child seat in which the engagement between the engaging portion and the engaged portion is performed behind the seat body.

According to the invention described in each claim, in the child seat, there is a common effect of reducing the manufacturing cost by sharing the seat belt type and ISOFIX type parts.
Hereinafter, the present invention will be more fully understood from the accompanying drawings and the description of the preferred embodiments of the present invention.

It is a perspective view showing roughly the whole child seat concerning the embodiment of the present invention. It is a perspective view of the child seat in a forward-facing state. It is a perspective view of the rearward state of a child seat. It is a perspective view of the base of a child seat. It is a top view of the cradle of FIG. It is a disassembled perspective view of a part of a child seat. It is a perspective view of the bottom face of the seat body of a child seat. It is a perspective view of the engaging part and engaged part of a child seat. It is a longitudinal cross-sectional view which passes the center of the horizontal direction of a child seat. It is an expansion longitudinal cross-sectional view of the left side rather than the center of the horizontal direction of a child seat. It is an expansion perspective view inside the seat main body of a child seat. It is a figure explaining the reclining mechanism and rotation mechanism of a child seat. It is another figure explaining the reclining mechanism and rotation mechanism of a child seat. It is a figure explaining the reclining operation | movement of a child seat. It is a figure explaining rotation operation of a child seat. It is a figure explaining the operation mechanism of a child seat. It is another figure explaining the operation mechanism of a child seat. It is another figure explaining the operation mechanism of a child seat. It is an expansion perspective view of the back of a child seat. It is an exploded view of a part of the height adjustment mechanism of the infant seat's infant belt. It is a figure explaining the height adjustment mechanism of the infant belt of a child seat. It is another figure explaining the height adjustment mechanism of the infant belt of a child seat. It is a perspective view which shows the adjustment belt of the uppermost position of a child seat. It is a perspective view which shows the adjustment belt of the lowest position of a child seat. It is an expansion perspective view of the back of a child seat. It is a perspective view of the back panel of a child seat. It is a top view of a part of infant belt. It is a side view of the expansion | extension state of the infant belt of FIG. It is a side view of the curved state of the infant belt of FIG. It is a front view of the infant belt of a child seat. It is a perspective view of the upper part of a child seat. It is an exploded assembly figure of the rotation locking mechanism of the hood mechanism of a child seat. It is a perspective view of the positioning mechanism of the support leg of a child seat. FIG. 34 is a longitudinal sectional view on the left side of the center of the positioning mechanism of FIG. 33. It is a longitudinal cross-sectional view which passes along the center of the positioning mechanism of FIG. It is another perspective view of the base of the child seat of FIG. It is a perspective view of the lower half body of the cradle of FIG. It is a perspective view of the child seat concerning a 2nd embodiment of the present invention. It is a perspective view of the lower half body of the cradle of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are denoted by common reference symbols throughout the drawings.

  FIG. 1 is a perspective view schematically showing an entire child seat 1 according to an embodiment of the present invention, FIG. 2 is a perspective view of the child seat 1 in a front-facing state, and FIG. 3 is a perspective view of the child seat 1 in a rear-facing state. FIG.

  The child seat 1 has a child seat body 10 and a support leg 100 that is detachably attached to the child seat body 10. The child seat main body 10 includes a cradle 20 attached to a seat of a vehicle (for example, an automobile), and a seat body 30 that is slidably supported on the cradle 20. The seat body 30 including the seating surface and the like of the child seat 1 is covered with a cover 11 having a cushioning property as shown in FIG. 1, but is omitted in the other drawings to clearly show the structure. Has been.

  In the present specification, in the description of each component, in the state where the child seat 1 is installed on the vehicle seat, the front in the traveling direction of the vehicle is defined as “front” and the opposite side is defined as “rear”. The state of the seat main body 30 shown in FIGS. 1 and 2 is referred to as a “forward-facing state” of the seat main body 30, and the state of the seat main body 30 shown in FIG. Called. In particular, when the seat body 30 is described, the front viewed from the seated infant may be described as “front” and the opposite side may be described as “rear”. Furthermore, the “right” direction and the “left” direction are determined relative to the “front” direction.

  The seat body 30 can be selectively rotated with respect to the cradle 20 between a forward state (FIGS. 1 and 2) and a rearward state (FIG. 3) by a rotation mechanism described later. Further, the seat main body 30 can be reclined by changing the inclination angle with respect to the cradle 20, that is, selecting a plurality of reclining positions, by a reclining mechanism described later.

  The cradle 20 will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view of the cradle 20 of the child seat 1, and FIG. 5 is a top view of the cradle 20. The cradle 20 is formed as a hollow as a whole, and has a base portion 21 placed on the seat portion of the vehicle seat, and an upright portion 22 that extends upward from the rear portion of the base portion 21 and faces the back portion of the vehicle seat. ing. The cradle 20 is formed by molding a hard plastic, for example, polypropylene, for each of the upper and lower halves or for each of the left and right halves, and is not limited thereto.

  A main body receiving opening 23, which is a substantially elliptical opening extending in the front-rear direction, is formed on the upper surface of the base portion 21 to accommodate the lower portion of the seat main body 30. On the periphery of the main body receiving opening 23, a support wall 23a extending downward by a predetermined length is formed in an annular shape along the shape of the main body receiving opening 23. On the upper surface of the base portion 21 around the body receiving opening 23, a cradle support surface 24 that is the upper surface of the base portion 21 and is gently inclined toward the center is formed. On the surface of the cradle support surface 24, a plurality of convex curved projections 24a arranged in alignment are formed. A cylindrical curved surface 25 raised from the bottom surface is formed in the body receiving opening 23, that is, inside the bottom surface of the base portion 21, and is exposed through the body receiving opening 23 on the top surface of the base portion 21.

  The cylindrical curved surface 25 is a concave curved surface having a central axis extending in the left-right direction, that is, a part of a cylindrical surface extending in the lateral direction, and the rear end is disposed higher than the front end (FIG. 9). In the cylindrical curved surface 25, on the center line H passing through the center in the lateral direction of the child seat 1, three lock holes 25a are formed at equal intervals in the front-rear direction. Further, on the cylindrical curved surface 25, a pair of lock grooves 25b extending in the front-rear direction are formed on the left and right parallel lines offset in the lateral direction from the center line H.

  A pair of elongated guide grooves 22b penetrating toward the inner space and extending in the front-rear direction are formed on the inclined surface 22a formed in the middle portion of the upright portion 22 of the cradle 20 and inclined forward. As will be described later, the guide groove 22b guides the sliding of the upper connecting rod 43 in the front-rear direction and restricts the movement in the lateral direction. Further, a rectangular opening 26 is formed in the upper front surface 22c of the upright portion 22 of the cradle 20 (FIG. 3). As will be described later, belt engaging protrusions 27 protruding in the lateral direction are formed on the left and right rear portions of the base portion 21 of the cradle 20, that is, on the left and right lower portions of the standing portion 22 of the cradle 20.

  The seat body 30 will be described with reference to FIGS. 6 and 7. FIG. 6 is an exploded perspective view of a part of the child seat 1, and FIG. 7 is a perspective view of the bottom surface of the seat body 30 of the child seat 1.

  The seat body 30 includes a seat lower portion 31 and a backrest portion 32 that extends upward from the rear portion of the seat lower portion 31. The sheet body 30 is formed by integrally molding a hard plastic, for example, polypropylene, but is not limited thereto. The exterior of the seat lower part 31 is formed by a tapered truncated cone part 31a and a smaller diameter cylindrical part 31b extending downward from the lower surface of the truncated cone part 31a. The lower end portion of the cylindrical portion 31 b is closed by a circular seat bottom surface 33. A circular opening 33a is formed in the center of the sheet bottom surface 33, and two circular openings 33b are formed on a line offset leftward from the center of the circular opening 33a of the sheet bottom surface 33.

  A head plate 60 is attached to the front surface of the back pad 32 so that the left and right sides are curved forward and serve as a headrest (FIG. 2). As will be described later, the position of the head plate 60 can be adjusted by sliding the head plate 60 in the vertical direction with respect to the backrest portion 32. The head plate 60 is formed by integrally molding a hard plastic, for example, polypropylene, but is not limited to this.

  The engaging part and engaged part of the child seat 1 will be described with reference to FIGS. 8 is a perspective view of the engaging portion and the engaged portion of the child seat 1, FIG. 9 is a longitudinal sectional view passing through the center of the child seat 1 in the lateral direction (left-right direction), and FIG. It is an expanded vertical sectional view of the left side rather than the center of the horizontal direction.

  A disc-shaped lower engaged guide member 40 is integrally attached as an engaged portion to the lower surface of the seat body 30, that is, the outer surface of the seat bottom surface 33. The diameter of the lower engaged guide member 40 is larger than the diameter of the cylindrical portion 31b. Referring particularly to FIG. 10, an annular engagement groove 40 a is formed in the vicinity of the periphery of the lower surface of the lower engaged guide member 40. One end of a lower connecting rod 41 is engaged with the engaging groove 40a of the lower engaged guide member 40 from below as an engaging portion. That is, the lower connecting rod 41 has an engagement hook 41a bent upward in a hook shape at one end thereof. The lower engaged guide member 40 is formed by integrally molding a hard plastic, for example, polypropylene, but is not limited to this.

  The other end 41 b (FIG. 10) of the lower connecting rod 41 is connected to the lower portion of the rod connecting member 42. The rod connecting member 42 is formed by integrally molding, for example, polyacetal or the like into a shape that fits the corner at the rear upper part of the internal space of the base portion 21, but is not limited thereto. As shown in FIG. 9, in a state where the lower engaged guide member 40 is disposed most rearward by a reclining mechanism described later, the rod connecting member 42 abuts on the inner wall of the base portion 21, and Fits into the corner. As a result, when the lower engaged guide member 40 is moved most rearward by the reclining mechanism, that is, when the reclining operation is performed in a state where the seat body 30 is more upright, the rod connecting member 42 abuts against the inner wall of the base portion 21, It plays the role of a shock absorbing material that absorbs an impact when the sheet body 30 moves. Further, the lower connecting rod 41 is formed to bend along the inner wall shape so as not to interfere with the inner wall of the base portion 21 in this state.

  A pair of upper connecting rods 43 are connected to the left and right of the upper portion of the rod connecting member 42 as engaging portions. Each of the upper connecting rods 43 protrudes to the outside through a guide groove 22b formed in the upright portion 22 of the cradle 20 (FIG. 10). The portion of the upper connecting rod 43 protruding outward includes a straight portion extending upward, a semicircular portion curved forward from the tip of the straight portion, and a straight portion extending slightly downward from the tip of the semicircular portion. Is formed. That is, the portion of the upper connecting rod 43 that protrudes to the outside has a hook shape in which the alphabet “J” is turned upside down.

  An annular upper engaged guide member 44 is attached to the outer conical surface of the truncated cone portion 31a of the seat body 30 as an engaged portion. The upper engaged guide member 44 has a cylindrical guide wall 44a extending upward along its annular shape. As shown in FIG. 8, each tip of the upper connecting rod 43 is engaged with the guide wall 44a of the upper engaged guide member 44 from above. In addition, a collision support surface 44 b that is a convex curved surface formed in an annular shape is formed at the lower portion of the outer peripheral surface of the upper engaged guide member 44. The upper engaged guide member 44 is formed by integrally molding a hard plastic, for example, polypropylene, but is not limited thereto.

  The upper engaged guide member 44 has a reinforcing member 44c formed of a metal such as carbon steel in order to reinforce the guide wall 44a when the upper connecting rod 43 and the guide wall 44a are engaged. Also good. The reinforcing member 44c may be disposed over the entire circumference of the guide wall 44a, and may be disposed so as to be engaged particularly in the forward and rearward states of the seat body 30, as shown in FIG.

  The upper engaged guide member 44 is covered from above by an annular cover member 45 so that the guide wall 44a is not exposed to the outside (FIG. 6). The upper engaged guide member 44 is rotatable while being covered by the cover member 45. The cover member 45 is formed with a through hole 45a at a corresponding position so that each tip of the upper connecting rod 43 can be engaged with the guide wall 44a of the upper engaged guide member 44 via the cover member 45. . In addition, a protective cover 46 is placed on the upper connecting rod 43 from above so that the upper connecting rod 43 is not exposed to the outside. The protective cover 46 is attached to the cover member 45. In FIG. 10, the cover member 45 and the protective cover 46 are not shown.

  The cover member 45 is formed by integrally molding acrylonitrile, butadiene, styrene, or the like, but is not limited thereto. The protective cover 46 is formed by integrally molding a hard plastic, for example, polypropylene, but is not limited to this. The lower connecting rod 41 and the upper connecting rod 43 are formed of a metal such as carbon steel, but are not limited thereto.

  The internal mechanism relating to the reclining mechanism and the rotating mechanism will be described in detail with reference to FIGS. 6, 9, 10 and 11. FIG. FIG. 11 is an enlarged perspective view of the inside of the seat body 30 of the child seat 1. The upper portion of the seat lower portion 31 of the seat body 30 is covered with a seat plate 34 that forms a seat where an infant sits, and the seat plate 34 defines an internal space 35 below the seat plate 34.

  A circular opening 40b having the same diameter is formed at the center of the lower engaged guide member 40 corresponding to the circular opening 33a at the center of the sheet bottom surface 33 of the sheet main body 30 (FIG. 6). A cylindrical reclining lock pin 50 is inserted into the circular opening 33 a of the seat bottom surface 33 and the circular opening 40 b of the lower engaged guide member 40 from the inner space 35 side of the seat body 30. The tip of the reclining lock pin 50 protruding downward from the lower surface of the lower engaged guide member 40 is inserted into any one of the lock holes 25a formed in the cylindrical curved surface 25 of the cradle 20 and engaged therewith.

  Further, two circular openings 40 c are formed on a line offset to the left from the center of the circular opening 40 b of the lower engaged guide member 40 corresponding to the two circular openings 33 b of the seat bottom surface 33 of the seat body 30. (FIG. 6). The respective ends of the U-shaped rotation lock pin 51 are inserted into the two circular openings 33 b of the seat bottom surface 33 and the two circular openings 40 c of the lower engaged guide member 40 from the inner space 35 side of the seat body 30. . Each tip of the rotation lock pin 51 protruding downward from the lower surface of the lower engaged guide member 40 is inserted into one of the lock grooves 25b formed in the cylindrical curved surface 25 of the cradle 20 and engaged therewith.

  For this reason, the offset amount of the line that aligns the two circular openings 33b from the center of the circular opening 33a on the seat bottom surface 33 and the line that aligns the two circular openings 40c from the center of the circular opening 40b of the lower engaged guide member 40 are shown. The offset amount and the offset amount from the center line H of the lock groove 25b formed on the cylindrical curved surface 25 of the cradle 20 are set to be equal.

  Referring particularly to FIG. 11, on the inner side surface of the seat bottom surface 33 of the seat body 30, that is, the bottom surface of the inner space 35, a first guide projection 33c and a second guide projection 33d that protrude upward and have a rectangular cross section. Is formed. The first guide protrusion 33c is disposed on the right side, and the second guide protrusion 33d is disposed on the left side. The first guide protrusion 33c and the second guide protrusion 33d are slightly tapered upward.

  A first pin holding member 52 is slidably attached to the first guide protrusion 33c and a second pin holding member 53 is slidably attached to the second guide protrusion 33d. Yes. That is, the first pin holding member 52 is formed with a complementary rectangular opening for receiving the first guide protrusion 33c, and the second pin holding member 53 is formed with a complementary rectangular opening for receiving the second guide protrusion 33d. Is formed. The first pin holding member 52 holds the reclining lock pin 50 described above, and the second pin holding member 53 holds the rotation lock pin 51 described above. The first pin holding member 52 is urged downward by a coil spring 54a, and the second pin holding member 53 is urged downward by a coil spring 54b.

  An operation mechanism is attached to a front portion of the upper surface of the seat lower portion 31 of the seat body 30. The operation mechanism has an operation console 55. On the right side of the operation console 55, a reclining operation lever 55a for operating the reclining mechanism is attached as a first operation portion so as to be slidable in the front-rear direction. On the left side of the operation table 55, a rotation operation lever 55b for operating the rotation mechanism as a second operation unit is attached so as to be slidable in the front-rear direction. The first pin holding member 52 is connected to the reclining operation lever 55a via an operation rod 56a extending obliquely upward. The second pin holding member 53 is connected to the rotation operation lever 55b through an operation rod 56b extending obliquely upward.

  When the reclining operation lever 55a is pulled forward, the first pin holding member 52 slides upward along the first guide protrusion 33c via the operation rod 56a. Thereby, the reclining lock pin 50 held by the first pin holding member 52 is also moved upward, and the engagement between the tip of the reclining lock pin 50 and the lock hole 25a is released. As a result, the seat body 30 can be reclined.

  The reclining operation lever 55a is urged to the rear position via the operation rod 56a by the urging force of the coil spring 54a that urges the first pin holding member 52 downward. Accordingly, when the reclining operation lever 55a is released after the reclining operation, the reclining operation lever 55a is returned to the rear position by the urging force of the coil spring 54a, and the tip of the reclining lock pin 50 is also inserted into the lock hole 25a again.

  On the other hand, when the rotation operation lever 55b is pulled forward, the second pin holding member 53 slides upward along the second guide protrusion 33d via the operation rod 56b. As a result, the rotation lock pin 51 held by the second pin holding member 53 also moves upward, and the engagement between each tip of the rotation lock pin 51 and the lock groove 25b is released. As a result, the sheet body 30 can be rotated.

  The rotation operation lever 55b is urged to the rear position via the operation rod 56b by the urging force of the coil spring 54b that urges the second pin holding member 53 downward. Therefore, when the rotation operation lever 55b is released after the rotation operation, the rotation operation lever 55b is returned to the rear position by the biasing force of the coil spring 54b, and each tip of the rotation lock pin 51 is also inserted into the lock groove 25b again. .

  The reclining mechanism and rotating mechanism of the child seat 1 will be described with reference to FIGS. 12 and 13. FIG. 12 is a diagram for explaining the reclining mechanism and the rotating mechanism of the child seat 1, and FIG. 13 is another diagram for explaining the reclining mechanism and the rotating mechanism of the child seat 1. 12 and 13 schematically show each configuration.

  As described above, the seat body 30 includes the lower engaged guide member 40, the upper engaged guide member 44, and the cover member 45. The lower connecting rod 41 and the upper connecting rod 43 connected via the rod connecting member 42 are connected while engaging the lower engaged guide member 40 and the upper engaged guide member 44. Each of the pair of upper connecting rods 43 passes through the corresponding guide groove 22b of the cradle 20, and further, the rod connecting member 42 abuts against the inner surface of the inclined surface 22a of the cradle 20, thereby lower connecting rods. 41 and the upper connecting rod 43 are guided to slide in the front-rear direction, and the lateral movement is restricted.

  In FIG. 12, the seat body 30 is in a reclining position corresponding to the rear lock hole 25a among the three lock holes 25a. In other words, the reclining position of the seat body 30 is fixed by engaging the reclining lock pin 50 protruding downward from the seat body 30 via the lower engaged guide member 40 with the lock hole 25a.

  Further, the outer surface of the seat lower portion 31 of the seat body 30 is supported by the cradle support surface 24 of the cradle 20 so as to withstand the load when the infant is seated. The lower engaged guide member 40 and the cylindrical curved surface 25 of the cradle 20 are disposed slightly apart. The outer surface of the seat lower portion 31 is slid and supported on the cradle support surface 24 of the cradle 20 during the reclining operation and the rotation operation of the seat body 30. Further, the lower engaged guide member 40 is slightly separated from the cylindrical curved surface 25 of the cradle 20 during the reclining operation and the rotation operation of the seat body 30. In other words, the size, shape, etc. are determined so that the outer surface of the seat body 30 is always in contact with and supported by the cradle support surface 24, and the lower engaged guide member 40 is slightly different from the cylindrical curved surface 25. The size, shape, etc. are determined so as to be spaced apart.

  The sheet body 30 can be smoothly slid by reducing the frictional resistance by coming into contact with the convex curved projections 24a formed on the pedestal support surface 24 of the pedestal 20 in a dotted manner.

  In this state, by releasing the engagement between the rotation lock pin 51 (not shown) and the lock groove 25b, the seat body 30 can be rotated around the rotation axis R substantially coincident with the central axis of the reclining lock pin 50. . In addition, although the reclining lock pin 50 and the rotation lock pin 51 are formed from metals, such as carbon steel, it is not limited to this.

  When the seat body 30 is rotated relative to the cradle 20, the lower engaged guide member 40 attached to the seat body 30 causes the engagement hook 41a of the lower connection rod 41 to engage with the annular engagement groove 40a. In this state, the sheet body 30 rotates with the sheet body 30. At this time, the lower connecting rod 41 is stationary relative to the cradle 20 because the lateral movement is restricted as described above. Therefore, the engaging hook 41a of the lower connecting rod 41 slides relatively while engaging in the annular engaging groove 40a of the lower engaged guide member 40.

  Further, when the seat body 30 is rotated with respect to the cradle 20, the upper engaged guide member 44 attached to the seat body 30 always engages each tip of the upper connecting rod 43 with the cylindrical guide wall 44a. In this state, it rotates together with the sheet main body 30. At this time, the upper connecting rod 43 is stationary relative to the cradle 20. Therefore, each tip of the upper connecting rod 43 slides relatively while always engaging along the cylindrical guide wall 44 a of the upper engaged guide member 44.

  The cover member 45 that covers the upper engaged guide member 44 and the protective cover 46 of the upper connecting rod 43 are stationary together with the upper connecting rod 43 relative to the cradle 20. In other words, the cover member 45 maintains the state of covering the upper engaged guide member 44 when the upper engaged guide member 44 rotates as the seat body 30 rotates, and the cover member 45 itself does not rotate.

  FIG. 13 shows a state in which the seat body 30 is reclined with respect to the cradle 20 from the rear reclining position shown in FIG. 12 to the front reclining position. That is, from the state shown in FIG. 12, the engagement between the reclining lock pin 50 and the rear lock hole 25 a is released, and the seat body 30 is slid forward along the cradle support surface 24. Subsequently, the reclining position is fixed by engaging the reclining lock pin 50 with the front lock hole 25a.

  The lower connecting rod 41 and the upper connecting rod 43 connecting the lower engaged guide member 40 and the upper engaged guide member 44 of the seat main body 30 follow the reclining operation of the seat main body 30 and follow the reclining operation of the seat main body 30. It slides back and forth along the guide groove 22b. Accordingly, the seat body 30 performs a reclining operation and a rotating operation with respect to the cradle 20, but the lower connection rod 41 and the upper connection rod 43 connected via the rod connection member 42 are not connected to the lower engagement of the seat body 30. The joint member 40 and the upper engaged guide member 44 are connected while maintaining the engaged state at all times, that is, while maintaining the relative positional relationship with the seat body 30.

  Of course, the seat body 30 may be in a reclining position corresponding to the central lock hole 25a. Even when the seat body 30 is in the reclining position corresponding to the central lock hole 25a and the reclining position corresponding to the front lock hole 25a, the seat body 30 around the rotation axis R that is the central axis of the reclining lock pin 50 is provided. Rotational motion is possible.

  The reclining operation and the rotation operation of the child seat 1 will be described with reference to FIGS. FIG. 14 is a diagram for explaining the reclining operation of the child seat 1, and FIGS. 14A to 14D show the reclining operation in time series. Moreover, FIG. 15 is a figure explaining the rotation operation | movement of the child seat 1, (a)-(d) of FIG. 15 has shown the rotation operation in time series.

  14 and 15, each of the three lock holes 25a, the two lock grooves 25b, the reclining lock pin 50, the rotation lock pin 51, the reclining operation lever 55a, and the rotation operation lever 55b is schematically shown. Is shown in Moreover, the cylindrical curved surface 25 which is a concave curved surface is typically shown as a horizontal plane. 14 and 15, the left side is the front side of the child seat 1 and the right side is the rear side of the child seat 1. 14 and 15, the upper diagram schematically shows the viewpoint from above including the cross-sectional view along the line XX in the lower diagram, and the lower diagram shows the side view. Is schematically shown including a cross-sectional view taken along the line YY in the above diagram, that is, a line along the lock groove 25b on the left side.

  The reclining operation will be described. FIG. 14A shows a state in which the seat body 30 faces forward, and the reclining operation lever 55a and the rotation operation lever 55b are not operated. The reclining lock pin 50 is engaged with the center lock hole 25a of the three, and the rotation lock pin 51 is engaged with the left lock groove 25b. FIG. 14B shows a state in which the reclining operation lever 55a is pulled forward, and the reclining lock pin 50 moves upward and the engagement with the lock hole 25a is released.

  FIG. 14C shows a state in which the seat body 30 is slid forward while the reclining operation lever 55a is pulled forward. That is, this operation is a reclining operation for reclining the seat body 30 with respect to the cradle 20. During the reclining operation, the rotation lock pin 51 is engaged with the lock groove 25b. FIG. 14D shows an operation of fixing the seat body 30 to the cradle 20 after sliding the seat body 30 forward, that is, after reclining. That is, by releasing the reclining operation lever 55a, the reclining operation lever 55a returns to the rear position, and the reclining lock pin 50 is inserted into the front lock hole 25a and engaged.

  The rotation operation will be described. FIG. 15A shows a state in which the seat body 30 faces forward, and the reclining operation lever 55a and the rotation operation lever 55b are not operated. The reclining lock pin 50 is engaged with the center lock hole 25a of the three aligned in the front-rear direction, and the rotation lock pin 51 is engaged with the left lock groove 25b. FIG. 15B shows a state in which the rotation operation lever 55b is pulled forward, and the rotation lock pin 51 moves upward and the engagement with the lock groove 25b is released.

  FIG. 15C shows a state in which the seat body 30 is rotated 180 degrees around the rotation axis R of the reclining lock pin 50 while the reclining operation lever 55a is pulled forward. That is, this operation is a rotation operation in which the seat body 30 is rotated with respect to the cradle 20 and the seat body 30 is changed from the forward state to the rearward state. During the rotation operation, the reclining lock pin 50 is engaged with the lock hole 25a. FIG. 15D shows an operation of fixing the sheet main body 30 to the cradle 20 after rotating the sheet main body 30. That is, by releasing the rotation operation lever 55b, the rotation operation lever 55b returns to the rear position, and the rotation lock pin 51 is inserted into and engaged with the other lock groove 25b.

  The reclining mechanism and the rotation mechanism of the child seat 1 are summarized. The child seat 1 includes a receiving base 20 having a lower connecting rod 41 and an upper connecting rod 43 as engaging portions, and a lower cover as an engaged portion engaging with the engaging portions. A seat body 30 having an engaging guide member 40 and an upper engaged guide member 44, and when the reclining position of the seat body 30 is changed and the seat body 30 is rotated, the engagement portion and the engaged portion are separated. Is maintained. That is, the relative positional relationship between these members is always constant. Therefore, the child seat 1 is a simple mechanism in which the number of parts is reduced and the parts are downsized as compared with a conventional child seat having a reclining mechanism and a rotating mechanism, and the seat body is independent of the rotational position of the seat body 30 with respect to the cradle 20. Can be reclined.

  In addition, since the reclining mechanism and the rotating mechanism are disposed in the lower part of the child seat 1, that is, the lower part of the seat 31 and the upright part 22 of the cradle 20, the seat body during the reclining operation and the rotating operation of the seat body 30 30 is stably supported with respect to the cradle 20, and as a result, it becomes possible to operate stably. In addition, since the reclining mechanism and the rotation mechanism are disposed below the standing portion 22 of the cradle 20, the upper portion of the standing portion 22 of the cradle 20 can be freely used.

  Further, since the reclining mechanism and the rotating mechanism are not exposed to the outside during the reclining operation and the rotating operation of the seat body 30, the fingers are not pinched and the safety is excellent. Also excellent.

  In addition, since the child seat 1 has the reclining lock pin 50 and the rotation lock pin 51 formed separately and operated independently, the child seat 1 has a single lock pin like the child seat described in Patent Document 1, for example. Compared with the case where the reclining operation and the rotation operation are selected in accordance with the protrusion amount, it is possible to perform a reliable and stable operation with a simple mechanism. Furthermore, since there is no need to change the protruding amount according to the desired operation, the processing accuracy and assembly accuracy of each component of the reclining mechanism and the rotating mechanism are not strict compared to the child seat described in Patent Document 1, As a result, component costs and manufacturing costs can be reduced.

  In addition, as long as the engagement between the cradle 20 and the seat body 30 is maintained during the reclining operation and the rotation operation, the engaging portion and the engaged portion can be arbitrarily configured. For example, the cradle 20 has only one of the lower engaged guide member 40 and the upper engaged guide member 44, and the seat body 30 has one of the corresponding lower connecting rod 41 and upper connecting rod 43. It may be. The lower engaged guide member 40 may have an annular shape or a polygonal shape instead of a disc shape. The lower engaged guide member 40 and the upper engaged guide member 44 may be formed integrally with the seat body 30.

  As a connecting member between the lower engaged guide member 40 and the upper engaged guide member 44, the lower connecting rod 41, the rod connecting member 42, and the upper connecting rod 43 may be integrally formed. Further, the lower connecting rod 41, the rod connecting member 42, and the upper connecting rod 43 are arranged at the rear side of the child seat 1 of the seat body 30, that is, on the rising portion 22 side of the cradle 20, and the lower engaged guide member 40 and the upper engaged guide. Although it is engaged with the member 44, other arrangements may be used as long as the seat body 30 can be moved back and forth according to the reclining operation.

  Three lock holes 25a are formed in the cylindrical curved surface 25 of the cradle 20, but may be two or four or more. That is, the reclining position corresponding to the number of the lock holes 25a can be set to an arbitrary number, and these may not be equally spaced. Also, the cylindrical curved surface 25 of the cradle 20 is formed with a pair of lock grooves 25b parallel to the center line H, but an arbitrary angle, for example, a lock groove orthogonal to the center line H is formed. You may be made to do. That is, in addition to the forward-facing state and the backward-facing state of the seat main body 30, the seat body 30 may be configured to be in a lateral state in which the infant faces sideways. Even in this horizontal state, a reclining operation may be enabled by providing a plurality of lock holes in the horizontal direction.

  By the way, as described above, the child seat 1 can recline the seat body 30 by pulling the reclining operation lever 55a, and can rotate the seat body 30 by pulling the rotation operation lever 55b. become. If the reclining operation and the rotation operation can be performed at the same time, the seat body 30 may draw a complicated and unpredictable trajectory and may collide with the operator. Therefore, the child seat 1 is configured so that the reclining operation and the rotation operation cannot be performed simultaneously.

  The operation mechanism of the reclining operation lever 55a and the rotation operation lever 55b will be described with reference to FIGS. FIG. 16 is a view for explaining the operation mechanism of the child seat 1, FIG. 17 is another view for explaining the operation mechanism of the child seat 1, and FIG. 18 is another view for explaining the operation mechanism of the child seat 1. is there. 16 to 18, the upper side is the rear of the seat body 30, and the lower is the front of the seat body 30.

  The operation switch 57 is a thick plate-like member, and is formed in a shape having a curved side surface, for example, a crescent shape or a boomerang shape. The operation switch 57 is attached to the operation table 55 so as to be rotatable around the fixed pin 57a by a fixed pin 57a at the center thereof. Abutting surfaces 57b that extend outward toward the front of the seat main body 30 are formed on the outer sides of the curved ends of the both ends of the operation switch 57, that is, on the side surfaces on the rear side. Since the operation switch 57 is covered from above by the reclining operation lever 55a and the rotation operation lever 55b, it cannot be visually recognized from the outside.

  The operation rod 56a is connected to the reclining operation lever 55a by a rod holding member 58a, and the operation rod 56b is connected to the rotation operation lever 55b by a rod holding member 58b. That is, the end of the operating rod 56a is refracted upward, that is, refracted in the front direction perpendicular to the paper surface in the figure, and the corresponding L-shaped rod holding member 58a is fitted from above. In other words, they are connected by fitting from the front direction perpendicular to the paper surface in the figure. The same applies to the rod holding member 58b. The rod holding member 58a and the rod holding member 58b may be formed integrally with the reclining operation lever 55a and the rotation operation lever 55b, respectively.

  Next, the operation of the operation switch 57 will be described. When the reclining operation lever 55a is pulled forward, that is, downward in the figure from the state of the operation mechanism shown in FIG. 16, the rod holding member 58a moves forward together with the operation rod 56a. At this time, the tip, that is, the front end portion of the rod holding member 58a first comes into contact with the contact surface 57b of the operation switch 57, and the operation switch 57 is rotated around the fixed pin 57a. When the reclining operation lever 55a is further pulled, the reclining operation lever 55a comes into contact with the stopper portion 55c of the operation table 55 and stops as shown in FIG.

  In this state, the contact surface 57b of the rotated operation switch 57 contacts the side surface of the rod holding member 58a, and the tip, that is, the front end portion of the other rod holding member 58b is the other contact surface of the operation switch 57. Abuts 57b. Accordingly, the movement of the rotation operation lever 55b is prevented by the tip of the rod holding member 58b coming into contact with the contact surface 57b of the operation switch 57. In other words, the front end portion of the other rod holding member 58b contacts the other contact surface 57b of the operation switch 57 in a state where the contact surface 57b of the rotated operation switch 57 contacts the side surface of the rod holding member 58a. As described above, the crescent-shaped or boomerang-shaped shape of the operation switch 57 is determined.

  When the reclining operation lever 55a is pulled (FIG. 17), the rotation operation lever 55b cannot be pulled. Conversely, when the rotation operation lever 55b is pulled (FIG. 18), the reclining operation lever 55a can be pulled. Can not. When one of the reclining operation lever 55a or the rotation operation lever 55b pulled forward is returned to the original position, the reclining operation lever 55a or the rotation operation lever 55b can be pulled forward. Therefore, according to such an operation mechanism, it is possible to prevent the reclining mechanism and the rotation mechanism from operating simultaneously with a simple mechanism, that is, an alternative operation can be safely realized.

  Further, the child seat 1 can be operated with one hand because the operation for reclining and rotating the seat body 30 can be performed by simply pulling the reclining operation lever 55a or the rotation operation lever 55b. Hands can be used freely. In addition, even if the operation mechanism is operated with one hand, it is possible to operate stably.

  As described above, the rod holding member 58a can be held without sliding the rod holding member 58a until one of the reclining operation lever 55a or the rotation operation lever 55b is pulled and the operation switch 57 contacts the side surface of the rod holding member 58a. When the tip of the member 58a rotates the operation switch 57, the other sliding of the reclining operation lever 55a or the rotation operation lever 55b may be restricted. That is, the operation switch 57 may be a simple rectangular member or the like. The operation mechanism having the operation switch 57 described above can be applied not only in the field of child seats, but also in other fields where there is a need to realize an alternative operation safely.

  By the way, with reference to FIG. 3 in particular, as described above, a rectangular opening 26 is formed in the upper portion of the upright portion 22 of the cradle 20. In other words, in the child seat 1, the reclining mechanism and the rotation mechanism are arranged at the lower part of the seat lower part 31 and the upright part 22 of the cradle 20, so that the opening 26 can be formed at the upper part of the upright part 22 of the cradle 20. . The opening 26 can be used as a handle for carrying the child seat 1.

  In addition, as shown in FIG. 4, a mechanism or device 90 having various functions can be mounted in the opening 26. Thereby, the cradle 20 can have a function other than the support function of the seat body 30. In particular, in the rearward state of the seat body 30, for example, a camera is mounted to take a still image or a moving image so that a guardian or the like can observe the state of the seated infant via a mobile phone or a car navigation system. May be. Further, a screen may be mounted so that the infant can enjoy the video. Furthermore, a speaker may be mounted so that an infant can enjoy sound. Further, a fan, an air conditioner, a lighting device, or the like may be mounted. Furthermore, you may mount the ion generator which discharge | releases ion in the air by plasma discharge etc. According to such an ion generator, air cleaning effects such as air disinfection, dust removal, sterilization, organic matter decomposition and deodorization, and hair care and face care effects for hair and skin care of infants and guardians can be expected. . Further, in order to easily replace these devices and the like, these devices and the like may be mounted via a fixture.

  In order to use the electric device mounted in the opening 26, the battery may be disposed inside the cradle 20 in a replaceable manner, or a cigar socket of the vehicle may be used as a power source. A power cable from a power source such as a battery or a cigar socket to an electrical device is wired so as to pass through the lower surface and the rear surface of the child seat 1 so as not to interfere with the reclining operation and the rotation operation of the seat body 30, or the cradle 20 It is desirable to route the wiring so as to pass through the inside.

  As a matter of course, the opening 26 may have a shape other than a rectangle, for example, a circle. Further, the opening 26 may be penetrated rearward or may be a simple recess. Furthermore, the opening 26 as described above is not limited to a child seat of a type in which the seat body can be reclined and rotated with respect to the cradle, as well as a type in which the seat body is fixed to the cradle and a seat body to the cradle. It can also be applied to a type that is detachably attached.

  By the way, the child seat is required to have high impact resistance performance for the purpose of protecting the infant from the impact acting on the vehicle at the time of collision. The impact resistance performance is verified by a displacement amount of the child seat with respect to the vehicle seat immediately after the collision, an irregular displacement amount of the movement of the child seat caused by a reaction due to the displacement immediately after the collision, and the like. In order to achieve high impact performance, it is desirable that the child seat is firmly fixed to the vehicle seat. For fixing the child seat, a seat belt of a seat belt device provided in a vehicle seat is usually used. A seat belt device provided in a vehicle seat includes a seat belt, a tongue including a tongue plate into which the seat belt is inserted, and a buckle on which the tongue plate can be attached and detached.

  In this regard, referring to FIG. 4, the child seat 1 has the belt engagement protrusions 27 formed on the left and right rear portions of the base portion 21 of the cradle 20 as described above. The belt engagement protrusion 27 is disposed at a position where the belt engagement protrusion 27 engages with the tongue or buckle 91 of the seat belt device from the rear side in a state where the cradle 20 is attached to the vehicle seat. In other words, the belt engagement protrusion 27 is formed over a certain length so as to be able to cope with the position of the tongue or buckle 91 that varies depending on the vehicle type. The belt engagement protrusion 27 may be a groove-like belt engagement groove as long as it can engage with the tongue or buckle 91 of the seat belt device.

  The tongue or buckle 91 of the seat belt device is usually disposed in the vicinity of the seat surface of the vehicle seat and has higher rigidity than the seat belt of the seat belt device. Therefore, by engaging the tongue or buckle 91 of such a seat belt apparatus with the cradle 20 of the child seat 1, particularly the belt engagement protrusion 27 or the belt engagement groove formed in the lower portion of the cradle 20, The cradle 20 can be fixed. As a result, high impact resistance is realized.

  The belt engagement protrusion 27 or the belt engagement groove is formed on the cradle 20 and the belt engagement with which the tongue or the buckle 91 is engaged so that the tongue or the buckle 91 is more securely engaged without being displaced or detached. It is desirable that the cross-sectional shape perpendicular to the length direction of the recesses or the belt engaging grooves between the mating protrusions 27 is formed so as to define an acute angle. Further, the belt engaging protrusion 27 or the belt engaging groove may be engaged with the seat belt of the seat belt device instead of the tongue or the buckle 91. Even in this case, it is possible to fix the child seat 1 more firmly than the conventional child seat by fixing the lower portion of the cradle 20 of the child seat 1. Further, the belt engaging protrusion 27 may be formed separately from the cradle 20.

  The belt engaging protrusion 27 or the belt engaging groove as described above is not only a child seat that can recline and rotate the seat body with respect to the cradle, but also a type or seat in which the seat body is fixed to the cradle. The present invention can also be applied to a type in which the main body is detachably attached to the cradle.

  The child seat 1 has a plurality of support points for impact in order to suppress the amount of displacement of the seat body 30 with respect to the cradle 20 and realize higher impact resistance performance. That is, for example, when the vehicle collides with an object from the front, the entire child seat 1 receives a forward inertial force. At this time, the cradle 20 is fixed by the seat belt of the vehicle, whereas the seat body 30 is not fixed by the seat belt of the vehicle. Accordingly, the seat body 30 tends to be displaced in the forward direction, but the amount of displacement of the seat body 30 is suppressed when the seat body 30 is in contact with and supported by the cradle 20 at the support point.

  In this regard, with reference to FIG. 10, the child seat 1 forms a support point A because each tip of the upper connecting rod 43 is engaged with the upper engaged guide member 44 as described above. That is, when the child seat 1 as a whole receives a forward inertial force due to a vehicle collision, each tip of the upper connecting rod 43 arranged on the cradle 20 that is directly fixed to the vehicle seat is connected to the seat body 30. The upper engaged guide member 44 disposed on the side is supported rearward. As a result, when the vehicle collides with an object, the forward displacement of the seat body 30 with respect to the cradle 20 is suppressed.

  Similarly, the collision support surface 44b formed on the outer peripheral surface of the upper engaged guide member 44 attached to the seat body 30 and the support wall surface 28a inside the front end of the cradle 20 form a support point B. ing. An annular upper surface 40d (FIG. 8) of the lower engaged guide member 40 attached to the seat body 30 and a lower end portion of the support wall 23a that defines the body receiving opening 23 of the cradle 20 are supported by the support point. C is formed. In FIG. 10, the support point C is the rear end portion of the lower end portion of the support wall 23 a of the cradle 20 and the rear end portion of the upper surface 40 d of the lower engaged guide member 40.

  Depending on the reclining position of the seat body 30, the support point C may be the left and right portions of the lower end portion of the annular support wall 23 a of the cradle 20 and the left and right portions of the upper surface 40 d of the lower engaged guide member 40. . That is, the diameter of the lower engaged guide member 40 is such that the upper surface 40d of the lower engaged guide member 40 forms the support point C with the lower end portion of the support wall 23a of the cradle 20 at any reclining position. The main body receiving opening 23 of the cradle 20 is formed larger than the lateral width L (FIG. 5). Thereby, in the child seat 1, the seat main body 30 accommodated in the main body receiving opening 23 is also prevented from coming off from the cradle 20.

  Since the child seat 1 has the support points A, B, and C, the displacement of the seat body 30 with respect to the cradle 20 is particularly suppressed, that is, the forward movement of the seat body 30 with respect to the cradle 20 is restricted. As a result, higher impact resistance performance can be realized. Further, since the support points A, B, and C are disposed at the lower part 31 of the child seat 1 and the lower part of the standing part 22 of the cradle 20, the cradle 20 can support the seat body 30 more stably. Further, since the impact is dispersed by the cradle 20 supporting the sheet body 30 at the plurality of support points A, B, and C, the material forming the cradle 20 and the sheet body 30 is made of metal, etc. It can be changed to a lighter resin or the like, and the cost can be reduced.

  Note that the cradle 20 and the sheet main body 30 do not always need to be in contact with each other at the support point, and may be slightly separated so as to contact only at the time of a collision. In addition, the child seat 1 may be configured to have only one support point A, or may be configured to have two support points among the support points A, B, and C. You may comprise so that it may have A, B, and C. Further, the support points for realizing high impact resistance performance are not limited to the above-described three portions. That is, the portion of the seat body 30 that comes into contact with the cradle 20 includes a front portion and a rear portion including the upper engaged guide member 44, and further includes a lower engaged guide member 40 below the front portion and the rear portion. It can be arbitrarily configured in the lower part.

  The height adjustment mechanism of the infant belt 70 (FIG. 1) will be described with reference to FIGS. 19 is an enlarged perspective view of the rear surface of the child seat 1, FIG. 20 is an exploded view of a part of the child belt height adjustment mechanism of the child seat 1, and FIG. 21 is a view of the height of the infant belt 70 of the child seat 1. FIG. 22 is a diagram illustrating the height adjusting mechanism, and FIG. 22 is another diagram illustrating the height adjusting mechanism of the infant belt of the child seat 1. In FIG. 19, a back panel 68, which will be described later, is omitted.

  The child seat 1 has a wide infant belt 70 corresponding to a seat belt provided in a vehicle seat in order to safely restrain an infant with respect to the child seat 1. The infant belts 70 are respectively arranged on the left and right sides of the front surface of the backrest portion 32 of the seat body 30, and the left and right infant belts 70 are fastened on the front side of the infant's torso. For this reason, the infant belt 70 extends forward through the back rest 32 from the rear of the back rest 32 of the seat body 30, and extends downward through the seating surface, that is, the seat lower portion 31. The lower portion of the seat 31 is fixed.

  The position of the backrest portion 32 through which the infant belt 70 penetrates from the seating surface of the seat body 30, that is, the height of the infant belt 70 needs to be adjusted according to the sitting height of the infant. Therefore, the child seat 1 has a height adjustment mechanism for the infant belt 70 in order to appropriately adjust the height of the infant belt 70.

  Therefore, two openings 36 extending in the vertical direction, that is, in the height direction are formed in the backrest portion 32 of the seat body 30. The openings 36 are formed symmetrically with respect to the center support portion 37 of the backrest portion 32, and are formed in the height direction over a range required as the height of the infant belt 70. Through these openings 36, the moving unit 61 including the above-described head plate 60 disposed on the front surface of the back pad 32 is attached to the back pad 32 so as to be slidable in the height direction.

  The moving unit 61 is disposed on the front surface of the back support unit 32 and the back surface of the back support unit 32, and is attached to the head plate 60 through the two openings 36 of the back support unit 32. The rotation support member 62, a first engagement member 63 attached to the rotation support member 62, and a second engagement member 64 attached to the first engagement member 63. In FIG. 20, the rotation support member 62, the first engagement member 63, and the second engagement member 64 are drawn slightly enlarged for clarity with respect to the backrest portion 32 and the head plate 60. . In addition, since the head plate 60 holds the infant belt 70 via the slot opening 60a, the head plate 60 constitutes a belt holding member, but may be constituted so as to be held by other members.

  In the head plate 60, two slot openings 60 a having substantially the same width as the openings 36 are formed at positions corresponding to the two openings 36 of the backrest portion 32 in order to allow the infant belt 70 to be inserted. . A mounting portion 60b is formed above each of the slot openings 60a and near the center of the head plate 60 so as to protrude rearward through the opening 36 of the backrest portion 32. A beam-like engaged beam 60c is formed below each slot opening 60a and near the center of the head plate 60 so as to protrude rearward through the opening 36 of the back pad 32. An engagement hole 60d penetrating in the vertical direction is formed at the tip of each engaged beam 60c.

  On the left side of the left slot opening 60a and the right side of the right slot opening 60a, a flat support plate 60e that protrudes rearward through the opening 36 of the backrest 32 and expands in the height direction is formed. The support plate 60e is formed with a recess 60f that receives a cylindrical engagement rod 65 described later. Further, two ventilation openings 60g that are always open toward the openings 36 are formed below the slot openings 60a regardless of the height position of the head plate 60.

  The rotation support member 62 includes a housing 62a, a rectangular flat protective wall 62b protruding upward from the housing 62a, and a flat first knob 62c protruding rearward from the housing 62a. The housing 62a is attached to the attachment portion 60b (FIG. 19) of the head plate 60 protruding through each opening 36 of the backrest portion 32, whereby the head plate 60 and the rotation support member 62 are integrated. It is attached. At this time, the column portion 37 of the backrest portion 32 is disposed between the head plate 60 and the rotation support member 62. The protective wall 62 b prevents the operator's hand from hitting the support column 37 of the seat body 30 when operating the moving unit 61.

  The first engagement member 63 has a box-shaped main body member 63a. A rectangular opening 63b is formed on the back surface of the main body member 63a. The upper part of the main body member 63a is attached to the housing 62a of the rotation support member 62 so that the first engagement member 63 can rotate around the rotation axis extending in the lateral direction. In addition, cylindrical engagement rods 65 extend outward in the left and right directions below the main body member 63a. The engaging rod 65 has a reinforcing rod 65a inserted for reinforcement in the inside thereof. The reinforcing rod 65a is formed from a metal such as carbon steel, but is not limited thereto.

  On the back surface of the backrest portion 32, an engaged curved surface portion 38 is formed on the left side of the column portion 37, the left opening 36, and the right side of the right opening 36. The engaged curved surface portion 38 includes a part of a cylindrical surface extending in the lateral direction, and a concave curved surface having a wide entrance so as to easily receive the columnar engaging rod 65 is aligned in the lateral direction and is high. It has a configuration in which a plurality are arranged at equal intervals in the vertical direction.

  By engaging the engagement rod 65 of the first engagement member 63 with an arbitrary horizontal row of concave curved surfaces of the engaged curved surface portion 38, the head plate 60 is positioned at an arbitrary height position with respect to the backrest portion 32. Can be adjusted to. At this time, the engaging rod 65 of the first engaging member 63 engaged with the engaged curved surface portion 38 slides in the height direction together with the first engaging member 63, and the recess 60 f of the support plate 60 e of the head plate 60. Also accepted within. Further, the first engaging member 63 is engaged with the engaged curved surface portion 38 of the backrest portion 32 by the left and right torsion springs 63 c integrally formed inside the rotation support member 62. It is biased in the rotating direction.

  The second engagement member 64 is a plate-like member that is slidable in the vertical direction inside the main body member 63a of the first engagement member 63, and is biased downward by a coil spring 64a. A pair of engagement pins 66 projecting downward from the main body member 63 a of the first engagement member 63 are formed on the left and right at the lower end of the second engagement member 64. Each of the engagement pins 66 is engaged with the head plate 60 by being inserted into the engagement hole 60 d of the engaged beam 60 c protruding from the head plate 60 through the opening 36. The second engagement member 64 has a flat plate-like second knob 64 b that protrudes rearward through the rectangular opening 63 b of the first engagement member 63.

  An operation for adjusting the height of the infant belt 70 will be described with reference to FIG. FIG. 21 is a view for explaining the height adjustment mechanism of the infant belt 70 of the child seat 1 as described above, and is a schematic longitudinal sectional view passing through the seat body 30, that is, the center of the moving portion 61 in the width direction. First, the first knob 62c of the rotation support member 62 and the second knob 64b of the second engagement member 64 are simultaneously gripped, and the second knob 64b is pulled upward in the direction of the first knob 62c (FIG. 21A )). That is, the second engagement member 64 is pulled upward with respect to the first engagement member 63. This operation is performed, for example, by placing a thumb on the upper surface of the first knob 62c and pulling it upward with the index finger and middle finger placed on the lower surface of the second knob 64b. By pulling the second engagement member 64 upward with respect to the first engagement member 63, the engagement pin 66 of the second engagement member 64 and the engagement hole 60 d of the engaged beam 60 c of the head plate 60 Is disengaged. As a result, the first engagement member 63 becomes rotatable with respect to the rotation support member 62 (FIG. 21B).

  Further, when the operation of pulling up the second knob 64 b of the second engagement member 64 is continued, the first engagement member 63 rotates with respect to the rotation support member 62. Accordingly, the engagement between the engagement rod 65 of the first engagement member 63 and the engaged curved surface portion 38 on the back surface of the backrest portion 32 is released. As a result, the head plate 60 is slidable in the height direction with respect to the backrest portion 32 (FIG. 21C). In this state, the infant belt 70 is slid to a desired height by sliding the head plate 60 in which the infant belt 70 is inserted into the slot opening 60a in the height direction with respect to the backrest portion 32. It becomes possible.

  Here, in a state where the second engagement member 64 is pulled upward with respect to the first engagement member 63 and the engagement of the engagement pin 66 is released, the first engagement member 63 with respect to the rotation support member 62. Is rotated, the sliding of the second engagement member 64 with respect to the first engagement member 63 is restricted. This will be described with reference to FIG. FIG. 22 is another view for explaining the infant belt height adjustment mechanism of the child seat 1 as described above, and is a longitudinal sectional view including the side surface of the second engagement member 64. In FIG. 22, members other than the first engaging member 63 and the second engaging member 64 are omitted.

  Referring to FIG. 22, a locking protrusion 64 c (see also FIG. 20) is formed on the side surface of the second engagement member 64, and a locking recess 62 d is formed inside the housing 62 a of the rotation support member 62. Yes. From the state of FIG. 22A, the second engagement member 64 is pulled upward with respect to the first engagement member 63 (FIG. 22B), and then the first engagement member with respect to the rotation support member 62. 63 is rotated. Thereby, the locking protrusion 64c of the second engagement member 64 engages with the locking recess 62d of the rotation support member 62 (FIG. 22C). As a result, the sliding of the second engagement member 64 with respect to the first engagement member 63 is restricted.

  Therefore, even if the lifting force of the second knob 64b of the second engagement member 64 is weakened in this state, the engagement pin 66 does not protrude again due to the biasing force of the coil spring 64a. In other words, the second engagement member 64 that is slid upward is the first engagement member 65 unless the engagement rod 65 of the first engagement member 63 is engaged with the engaged curved surface portion 38 of the backrest portion 32. The two engaging members 64 are configured safely so that they do not return to their original positions.

  In order to fix the infant belt 70 at the desired height after sliding the infant belt 70 to a desired height, the above-described series of operations may be performed in reverse. That is, the first engagement member 63 is rotated with respect to the rotation support member 62, and the engagement rod 65 of the first engagement member 63 is engaged with the engaged curved surface portion 38 of the backrest portion 32. Thereby, the engagement between the locking protrusion 64c of the second engagement member 64 and the locking recess 62d of the rotation support member 62 is released. Next, the second engagement member 64 is slid downward relative to the first engagement member 63, and the engagement pin 66 of the second engagement member 64 is engaged with the engagement hole of the engaged beam 60 c of the head plate 60. Engage with 60d. These operations are facilitated by the urging force of the torsion spring 63c and the coil spring 64a.

  The height adjustment mechanism of the infant belt 70 described above has two engagements, that is, the engagement of the second engagement member 64 with the head plate 60 and the engagement of the first engagement member 63 with the backrest portion 32. Therefore, even if an impact is applied to the entire child seat 1, both engagements are not disengaged. That is, the disengagement of the second engagement member 64 with respect to the head plate 60 is performed by the upward movement, and the disengagement of the first engagement member 63 with respect to the backrest portion 32 is performed in the rotational direction, that is, the backrest portion 32. This is done by moving away from the direction. Therefore, the direction of the force required to release these engagements is substantially orthogonal.

  Nevertheless, the disengagement of the second engagement member 64 with respect to the head plate 60 and the disengagement of the first engagement member 63 with respect to the backrest 32 are performed by the second knob 64b of the second engagement member 64. It is performed by a series of continuous operations of pulling up. That is, by always applying the same upward force to the second knob 64b of the second engagement member 64, the two-stage engagement can be released. Therefore, the height adjustment mechanism of the infant belt 70 described above is configured such that unintentional engagement is not easily released and intended engagement is easily released.

  Further, since the engaged curved surface portion 38 is formed while leaving the support column portion 37 in the center of the backrest portion 32, the strength of the backrest portion 32 is maintained. In addition, since the concave curved surfaces of the engaged curved surface portion 38 of the backrest portion 32 are formed to be aligned in three rows in the height direction, the engaging rods 65 of the first engaging member 63 are arranged in a horizontal row. Therefore, it is possible to prevent the engaged curved surfaces 38 having different heights from being engaged with the concave curved surfaces.

  The height adjusting mechanism of the infant belt 70, that is, the moving mechanism can be arbitrarily configured as long as it can be operated by the operation described with reference to FIG. That is, in the moving mechanism, the sliding direction and the direction of the force applied to the second engaging member are parallel, and the engagement is first released by the sliding of the second engaging member, and then the rotation of the first engaging member is performed. As long as the engagement is released and the slidable state is obtained, the configuration may be arbitrarily set. Further, the height adjusting mechanism described above can be applied not only in the field of child seats but also in other fields where there is a need to safely operate the moving mechanism.

  By the way, the infant belt 70 is appropriately adjusted in height according to the sitting height of the infant by the above-described height adjusting mechanism, and then tightened according to the infant's body shape, that is, in front of the backrest portion 32. It is necessary to adjust the length extending to the appropriate distance.

  The adjustment of the length of the infant belt 70 using the adjustment belt 75 will be described with reference to FIGS. 23 is a perspective view showing the uppermost adjustment belt 75 of the child seat 1, and FIG. 24 is a perspective view showing the lowermost adjustment belt 75 of the child seat 1. As shown in FIG. FIG. 23 and FIG. 24 are perspective views of the seat body 30 of the child seat 1 as viewed from below.

  The left and right infant belts 70 are connected on the rear side of the backrest portion 32 of the seat body 30 and are thus constituted by a single belt. The infant belt 70 is connected to one end of one wide adjustment belt 75 on the rear side of the backrest portion 32 of the seat body 30. That is, one end of the adjustment belt 75 is folded back and stitched together with the folded back portion. As a result, a loop portion 75 a is formed at one end of the adjustment belt 75. The infant belt 70 is inserted into the loop portion 75a. Therefore, the loop portion 75 a of the adjustment belt 75 constitutes a connection portion with the infant belt 70. The adjustment belt 75 is formed by weaving a material normally used in a vehicle seat belt, for example, polyester fiber, but is not limited thereto.

  The adjustment belt 75 extends downward along the backrest portion 32 of the seat body 30, and is formed in the vicinity of the lower end portion of the seat body 30, that is, the opening 31c formed in the lower portion of the rear side surface of the cylindrical portion 31b of the seat lower portion 31 (FIG. 7). Into the internal space 35. Next, referring to FIG. 9, the adjustment belt 75 that has entered the interior space 35 of the seat body 30 is sharpened by a belt support protrusion 33 e that is formed on the bottom surface of the interior space 35 and projects upward. It bends and extends upward to the vicinity of the lower surface of the sheet plate 34.

  Next, the adjustment belt 75 extends in the internal space 35 in the forward direction in parallel with the seat bottom surface 33, and then the opening 31d formed in the upper portion of the front side surface of the cylindrical portion 31b of the seat lower portion 31 (also FIG. Go to the outside of the internal space 35. Next, the adjustment belt 75 extends upward from the opening 31 e formed on the front side surface of the truncated cone portion 31 a of the seat lower portion 31. Next, the adjustment belt 75 extends forward of the seat body 30 via a belt adjuster 76 disposed on the rear side of the operation base 55 of the operation mechanism attached to the front portion of the upper surface of the seat lower portion 31 (FIG. 1).

  The belt adjuster 76 can lock and release the adjustment belt 75 by a known mechanism. When the adjustment belt 75 is locked by the belt adjuster 76, the adjustment belt 75 cannot be moved in the front-rear direction with respect to the belt adjuster 76. On the other hand, when the belt adjuster 76 is unlocked, the adjustment belt 75 can be moved in the front-rear direction with respect to the belt adjuster 76.

  Next, the length adjustment of the infant belt 70 will be described. The length adjustment of the infant belt 70 is performed in a state where the lock of the belt adjuster 76 is released. When it is desired to increase the length of the infant belt 70 extending forward of the back pad 32, the infant belt 70 extending forward of the back pad 32 can be lengthened by pulling forward or upward. Eventually, the infant belt 70 can be pulled until there is no excess portion on the rear side of the back rest 32 of the seat body 30. At this time, the length of the infant belt 70 extending forward of the backrest portion 32 is the maximum, and the loop portion 75a of the adjustment belt 75 connected to the infant belt 70 is at the uppermost position (FIG. 23).

  The uppermost position of the adjustment belt 75 is a position where the loop portion 75a corresponds to a portion where the slot opening 60a of the head plate 60 through which the infant belt 70 is inserted is formed. Therefore, the uppermost position of the adjustment belt 75 changes according to the height adjusted by the height adjustment mechanism of the infant belt 70.

  On the other hand, when it is desired to shorten the length of the infant belt 70 extending forward of the backrest 32, the length (FIG. 1) of the adjustment belt 75 extending forward of the seat body 30 is shortened by pulling forward. Can do. Finally, the adjustment belt 75 can be pulled until the loop portion 75a of the adjustment belt 75 connected to the infant belt 70 is disposed in the vicinity of the opening 31c of the seat lower portion 31. At this time, the length of the infant belt 70 extending forward of the backrest portion 32 is the shortest, and the loop portion 75a of the adjustment belt 75 connected to the infant belt 70 is at the lowest position (FIG. 24).

  The lowest position of the adjustment belt 75 is a position where the loop portion 75a is in the vicinity of the opening 31c of the seat lower portion 31. Accordingly, the lowermost position of the adjustment belt 75 is fixed at the position of the opening 31 c of the seat lower portion 31.

  As described above, the length adjustment of the infant belt 70 is performed by pulling the infant belt 70 extending forward of the backrest portion 32 or the adjustment belt 75 extending forward of the seat body 30. The tightening degree of the infant belt 70 according to the body shape can be adjusted.

  In the child seat 1, the adjustment belt 75 extends into the vicinity of the rear lower end portion of the seat body 30, that is, the opening 31 c formed in the lower portion of the rear side surface of the cylindrical portion 31 b of the seat lower portion 31 and then enters the inner space 35. Next, the adjustment belt 75 is bent at an acute angle and extends upward by the belt support protrusion 33e. Therefore, it cannot be said that the adjustment belt 75 passes the shortest distance toward the belt adjuster 76, and follows a detoured path. For this reason, in the child seat 1, the lowermost position of the adjustment belt 75 is arranged near the lower end of the seat body 30 below the conventional child seat, thereby increasing the distance between the uppermost position and the lowermost position of the adjustment belt 75. Secured for a long time. As a result, the range of adjustment of the length of the infant belt 70 can be made wider.

  In order to make the adjustment of the adjustment belt 75 smooth, a pulley may be disposed on a portion in contact with the seat body 30, for example, on the opening 31c. Further, the adjustment belt 75 may pass through the outside thereof, that is, the lower surface of the seat body 30 without passing through the inside of the seat body 30.

  Incidentally, a back panel (harness panel) 68 is attached to the back surface of the backrest portion 32 of the seat body 30. FIG. 25 is an enlarged perspective view of the rear surface of the child seat 1, and FIG. 26 is a perspective view of the rear panel 68 of the child seat 1. The back panel 68 covers the extra infant belt 70 and the adjustment belt 75 disposed on the rear side of the back support portion 32 of the seat body 30 so as not to get in the way, and serves to be accommodated in the back surface of the back support portion 32. . Further, the back panel 68 serves to cover part of the moving part 61 and the engaged curved surface part 38 formed on both sides of the opening 36 of the backrest part 32 of the seat body 30 so as not to be exposed.

  As shown in the longitudinal sectional view of FIG. 9, the rear panel 68 is disposed so as to extend in the height direction at the center portion in the width direction of the seat body 30, and is fitted and attached to the seat body 30. ing. The back panel 68 has a panel upper part 68a and a panel lower part 68b. The back panel 68 is integrally formed from a resin material such as polypropylene by injection molding so as to have flexibility. In particular, the boundary portion between the panel upper portion 68a and the panel lower portion 68b of the back panel 68 is formed thinner than others, and forms a hinge 68c that can be repeatedly bent without being damaged. However, the rear panel 68 may be bent by its flexibility, omitting the hinge 68c. The infant belt 70 and the adjustment belt 75 are accommodated in an accommodation space 68d (FIG. 9) between the seat body 30 and the back panel 68.

  The upper end portion of the back panel 68 is engaged with the back rest portion 32 of the seat body 30. By releasing this engagement, the panel upper portion 68a is bent backward about the hinge 68c, and the seat The accommodation space 68d between the main body 30 and the back panel 68 can be opened. That is, the back panel 68 can be partially separated from the backrest portion 32. For example, when adjusting an extra portion of the infant belt 70 disposed on the back side of the seat body 30, the panel upper portion 68a of the back panel 68 can be bent and opened to facilitate the work.

  Further, an opening 68e is formed in the panel upper portion 68a of the rear panel 68 over the height direction at the center portion in the width direction. The width of the opening 68 e is larger than the width of the column portion 37 of the backrest portion 32 of the seat body 30. Therefore, the two openings 36 of the backrest 32 are partially exposed through the opening 68e of the back panel 68. As a result, the two openings 36 of the back support portion 32 and the ventilation openings 60g (FIG. 20) of the head plate 60 are provided in the front-rear direction of the back support portion 32 of the seat body 30 so that the seated infant does not become uncomfortable. Therefore, air permeability can be secured. Furthermore, since the opening 68e is formed in the back panel 68, the moving part 61 can be operated with the back panel 68 attached. That is, it is possible to access the first knob 62 c of the rotation support member 62 and the second knob 64 b of the second engagement member 64 through the opening 68 e of the back panel 68.

  The infant belt 70 will be described with reference to FIGS. 27 is a top view of a part of the infant belt 70, FIG. 28 is a side view of the infant belt 70 in FIG. 1 in an expanded state, and FIG. 29 is a side view of the infant belt 70 in FIG. FIG.

  The infant belt 70 used in the child seat 1 is formed by overlapping a plurality of flexible belt-like straps 71, for example, two straps 71a and 71b. Each of the straps 71a and 71b is formed by weaving a material normally used in a vehicle seat belt, for example, a polyester fiber. The straps 71a and 71b are stitched along a plurality of lines extending in the length direction, for example, two lines 71c.

  When the infant belt 70 is bent, the bent state is maintained against gravity even after releasing the bending force. That is, when the superimposed straps 71 are curved, the curvature radius of the curved strap 71a is smaller than the curvature radius of the curved strap 71b. Due to the difference in the radius of curvature, the outer surface of the opposing inner strap 71a and the inner surface of the outer strap 71b extend in the circumferential direction of the curve, for example, the length direction of the strap 71, thereby causing a shift. Then, when the bending force is released, the infant belt 70 tries to return the extended outer strap 71b, but the outer surface of the inner strap 71a and the inner surface of the outer strap 71 are caused by frictional resistance. Lock. As a result, the deformed infant belt 70 maintains its shape against gravity even after releasing the deforming force.

  Therefore, even after the guardian removes the infant belt 70 and lowers the infant from the child seat, the infant belt 70 maintains its shape against the force of gravity. Never become. Further, since the straps 71a and 71b are formed of a flexible material such as polyester fiber, it is safe even if an infant or a guardian contacts or collides with the infant belt 70.

  Note that the straps 71a and 71b may be loosely stitched so that the displacement between the two straps 71a and 71b is greater when the infant belt 70 is deformed. Further, the infant belt 70 may be maintained in shape by inserting a wire, a metal plate, or the like that can be maintained in a deformed shape into the inside without depending on frictional resistance. Moreover, it is good also as a structure which maintains a shape as mentioned above, and the infant belt 70 may be comprised partially. Further, an infant belt cover 77 (FIG. 1) having a cushioning property may be wound around the part of the infant belt 70 that comes into contact with the infant. In this case, the infant belt cover 77 may be configured to maintain the shape as described above. Furthermore, the above-described infant belt 70 is applicable not only in the field of child seats but also in other fields where there is a need for a belt that maintains its shape against gravity.

  A method of attaching the infant belt 70 to the seat body 30 will be described with reference to FIGS. FIG. 30 is a front view of the infant belt 70 of the child seat 1. In particular, the infant belt 70 shown in FIG. 30 is a crotch belt in which a fastening portion 78 (FIG. 1) to which the left and right infant belts 70 are fastened by a fastening mechanism is attached at one end and is arranged between the crotch of the infant. An infant belt 70. In the attachment method to the seat body 30, the left and right infant belts 70 and the crotch infant belt 70 are the same. As described above, the infant belt 70 extending from the backrest portion 32 of the seat body 30 and the infant belt 70 of the crotch belt penetrate the seat lower portion 31 downward and are fixed at the lower portion of the seat body 30. . Accordingly, as shown in FIG. 7, the seat lower portion 31 is provided with attachment openings 31f as right and left and front portions as rectangular through holes as attachment portions for attaching the infant belt 70 therethrough.

  Further, the tip of the strap 71 constituting the infant belt 70 that penetrates the seat lower portion 31 of the seat body 30 is folded back and stitched with the folded back portion. As a result, a loop portion 72 formed in a loop shape is formed at the tip of the infant belt 70.

  Next, a cylindrical fixing rod 73 is inserted into the loop portion 72 of the infant belt 70 that penetrates the seat lower portion 31 of the seat body 30. The fixing rod 73 is formed by cutting, for example, a round bar material from a metal such as carbon steel, but is not limited thereto. The fixing rod 73 is formed larger than the attachment opening 31f of the seat lower part 31 through which the infant belt 70 passes. That is, the length of the cylindrical fixing rod 73 is larger than the horizontal dimension of the rectangular mounting opening 31f, and the diameter of the fixing bar 73 is larger than the vertical dimension of the mounting opening 31f. Therefore, the infant belt 70 does not come out of the seat body 30 in a state where the fixing rod 73 is inserted into the loop portion 72 of the infant belt 70. The fixing rod 73 inserted in the loop portion 72 of the infant belt 70 is fitted and fixed in a snap manner by an engaging claw 31g formed in the vicinity of the attachment opening 31f of the seat body 30.

  Since the infant belt 70 is securely fixed by the snap-type fitting of the fixing rod 73, the infant belt 70 hangs down below the seat body 30 and does not get in the way. Note that the fixing rod 73 may not be a columnar shape, that is, a circular cross section, as long as it is rod-shaped. For example, the fixing rod 73 may be configured to have a polygonal cross section such as a quadrangle and a hexagon.

  By cutting the fixing rod 73 for fixing the infant belt 70 from the rod-shaped material, the raw material cost and the processing cost can be made extremely low. In addition, the fixing rod 73 has a simple structure and is excellent in strength. Furthermore, the fixing of the infant belt 70 to the seat body 30 using the fixing rod 73 is simply performed by snapping, so that the attaching operation is also simple.

  The hood mechanism 80 will be described with reference to FIGS. 31 and 32. FIG. 31 is a perspective view of the upper part of the child seat 1, and FIG. 32 is an exploded view of the rotation locking mechanism 81 of the hood mechanism 80 of the child seat 1.

  The hood mechanism 80 is attached to the head plate 60, and the entire hood mechanism 80 slides as the head plate 60 slides in the vertical direction. The hood mechanism 80 includes a rotation locking mechanism 81, a hood (not shown) that covers the infant's head, one fixed hood stay 82 that serves as a framework for supporting the hood, two first movable hood stays 83 and second And a movable hood stay 84. The rotation locking mechanism 81 includes a pair of stay support members 85 attached to the curved left and right portions of the head plate 60, a pair of first rotation locking members 86, and a pair of second rotation locking members 87. doing.

  Both end portions of the fixed hood stay 82 are fixedly attached to the left and right stay support members 85. Both ends of the first movable hood stay 83 are attached to the left and right stay support members 85 via the first rotation locking member 86 so as to be able to rotate stepwise, that is, to be locked at stepwise rotation positions. It has been. Both end portions of the second movable hood stay 84 are attached to the left and right stay support members 85 in a stepwise manner via second rotation locking members 87.

  Therefore, the first movable hood stay 83 and the second movable hood stay 84 as a whole can be rotated stepwise forward or backward around the rotation axis extending in the lateral direction. Therefore, the hood can be unfolded forward or folded backward. Note that the first movable hood stay 83 has a larger rotation angle than the second movable hood stay 84, and therefore can be deployed forward of the second movable hood stay 84.

  The first rotation locking member 86 has a first rotation end portion 86a formed in a circular shape. Further, the second rotation locking member 87 has a second rotation end portion 87a formed in a circular shape having the same diameter as the first rotation end portion 86a. The stay support member 85 has a rotation support portion 85a formed in a circular shape having the same diameter as the first rotation end portion 86a of the first rotation engagement member 86 and the second rotation end portion 87a of the second rotation engagement member 87. doing. An elastic beam 85b defined by a U-shaped groove is formed at the center of the rotation support portion 85a.

  A first rotation end 86a of the first rotation locking member 86 is disposed on the outer surface of the elastic beam 85b of the stay support member 85, and a second rotation locking member is disposed on the inner surface of the elastic beam 85b of the stay support member 85. 87 second rotation end 87a is arranged. The elastic beam 85b, the first rotation end portion 86a, and the second rotation end portion 87a are fastened so as to be rotatable by inserting a rotation pin 88 through each center.

  On the circumference that is concentric with the rotation center of the first rotation end 86a of the first rotation locking member 86, two locking recesses 86b having a concave curved surface are formed. Similarly, two locking concave portions (not shown) having a concave curved surface are formed on the circumference concentric with the rotation center of the second rotation end portion 87 a of the second rotation locking member 87. Further, on the outer surface of the rotation support portion 85 a of the opposing stay support member 85, there is a relationship on the circumference concentric with the rotation center of the first rotation locking member 86 and over the rotation range of the first rotation locking member 86. A plurality of convex protrusions 85c (not shown) having convex curved surfaces that are engaged with the engaging recesses 86b are formed at positions corresponding to the engaging recesses 86b. Similarly, the inner surface of the rotation support portion 85 a of the opposing stay support member 85 has a circumference concentric with the rotation center of the second rotation locking member 87 and the rotation range of the second rotation locking member 87. A plurality of convex protrusions 85c having convex curved surfaces that are engaged with the engaging recesses 87b are formed at positions corresponding to the engaging recesses 87b.

  When the first movable hood stay 83 is slightly rotated with respect to the stay support member 85 in order to expand or fold the hood, the lock recess 86b of the first rotation lock member 86 and the stay support member 85 are thereby locked. The locking with the convex portion 85c is once released. That is, the locking projection 85 c of the stay support member 85 is disposed between the adjacent locking recesses 86 b of the first rotation locking member 86, and the rotation support 85 a and the first rotation locking member 86 of the stay support member 85. The first rotation end portions 86a are slightly separated from each other. In this state, the rotation support portion 85a of the stay support member 85 and the first rotation lock by the elastic force of the elastic beam 85b of the stay support member 85 connected to the first rotation end portion 86a of the first rotation lock member 86. The member 86 is biased in the direction in which the first rotation end 86a approaches.

  Next, when the first movable hood stay 83 is further rotated with respect to the stay support member 85, the lock recess 86b of the first rotation lock member 86 is locked to the lock protrusion 85c of the stay support member 85 adjacent in the rotation direction. Locks in and stabilizes. The urging force of the elastic beam 85b of the stay support member 85 also contributes to this stable locking. On the other hand, the state in which the engagement between the engagement recess 86b of the first rotation engagement member 86 and the engagement protrusion 85c of the stay support member 85 is released is an unstable state. Accordingly, during the rotation operation of the first movable hood stay 83, the first rotation locking member 86 is stabilized by the locking recess 86b being locked to the locking projection 85c of the stay support member 85 adjacent in the rotation direction. As described above, stepwise rotation, that is, locking at a stepped rotational position is possible.

  The rotation of the second movable hood stay 84 relative to the stay support member 85 is the same as the rotation of the first movable hood stay 83 relative to the stay support member 85 described above. Therefore, during the rotation operation of the second movable hood stay 84, the second rotation locking member 87 is stabilized by locking the locking recess with the locking projection 85c of the stay support member 85 adjacent in the rotation direction. In addition, stepwise rotation is possible.

  Since the hood mechanism 80 described above can be slid in the vertical direction together with the head plate 60, the height can be adjusted by a simple operation in accordance with the sitting height of the infant to be seated. Further, the locking recess 86b of the first rotation locking member 86 and the locking recess of the second rotation locking member 87 are formed in a concave curved surface shape, and the locking projection 85c of the stay support member 85 that locks with these is provided. Since it is formed in a convex curved surface, it can be locked and released very smoothly. Therefore, although it is a simple mechanism with a small number of parts, a rotation locking mechanism capable of smoothly rotating and locking without requiring lubricating oil can be realized.

  In addition, the structure which abbreviate | omitted any one of the two 1st movable hood stays 83 and the 2nd movable hood stays 84 may be sufficient. Thereby, when the child seat is commercialized, it becomes possible to easily show the difference for each product model. Further, a locking projection may be formed on the locking recess 86 b and the second rotation locking member 87 of the first rotation locking member 86, and a locking recess may be formed on the stay support member 85. Moreover, the number of latching convex parts and latching recessed parts can be selected arbitrarily. Further, the locking projection and the locking recess may have any shape as long as the locking and locking recesses can be locked and released.

  The positioning mechanism 110 of the support leg 100 will be described with reference to FIGS. 33 to 35. 33 is a perspective view of the positioning mechanism 110 of the support leg 100 of the child seat 1. FIG. 34 is a longitudinal sectional view to the left of the center of the positioning mechanism 110 of FIG. 33. FIG. 3 is a longitudinal sectional view passing through the center of the mechanism 110. FIG. In FIG. 33, in order to clarify the internal structure of the positioning mechanism 110, only the outline of some members is drawn.

  As shown in FIGS. 2 and 3, the support leg 100 extends to the floor of the vehicle that supports the seat of the vehicle to which the child seat body 10 is attached, and supports the child seat body 10, that is, the front portion of the cradle 20 from below. doing. The support leg 100 includes a leg portion 101 that is extendable in the length direction, and a positioning mechanism 110 that is attached to the leg portion 101 and determines the length of the leg portion 101.

  The leg portion 101 includes a first tubular member 102 attached to the cradle 20 and a second tubular member 103 disposed below the first tubular member 102. The upper portion of the second tubular member 103 is inserted into the lower portion of the first tubular member 102, and the length of the leg portion 101 can be adjusted by adjusting the amount of insertion. The first tubular member 102 is formed with one through hole 102a into which a fixing member 117 described later is inserted. The second cylindrical member 103 is formed with a plurality of through holes 103a that are arranged along the length direction and into which the fixing member 117 is selectively inserted (FIG. 2).

  The positioning mechanism 110 is attached to the lower part of the first cylindrical member 102, and includes a housing 113 including a first housing half 111 and a second housing half 112, a slider 114, and a leg operation lever 115. ing. The first housing half 111 is attached from the front of the first tubular member 102, and the second housing half 112 is attached from the rear of the first tubular member 102. That is, the first housing half 111 and the second housing half 112 are attached to the first tubular member 102 by fitting the first tubular member 102 so as to sandwich the first tubular member 102 from the front and rear.

  In the housing 113 on the first housing half 111 side, between the direction perpendicular to the length direction of the leg portion 101, that is, the direction away from the leg portion 101 passing through the housing 113 and the adjacent direction. A slider 114 is disposed so as to be slidable. That is, a plurality of guide walls 111 a for guiding the sliding of the slider 114 is formed in the housing 113 on the first housing half 111 side. A hollow boss 111c protruding rearward is formed on the inner wall 111b on the front surface of the first housing half 111, and a coil spring 116 is disposed around the boss 111c.

  A recess 114 a that receives the boss 111 c of the first housing half 111 and the coil spring 116 is formed on the upper portion of the slider 114. In addition, a columnar guide protrusion 114b protruding forward is formed in the recess 114a of the slider 114 (FIG. 35). That is, the slider 114 receives the boss 111c and the coil spring 116 of the first housing half 111 in the recess 114a at the upper portion thereof, and the guide protrusion 114b of the slider 114 is inserted into the hollow boss 111c. . Further, protrusions 114c are formed on the left and right of the upper portion of the slider 114 (FIG. 34). Further, a separate fixing member 117 protruding rearward is attached to the lower portion of the slider 114 (FIG. 35). The fixing member 117 may be formed integrally with the slider 114.

  An operation tab 115 a is formed at one end of the leg operation lever 115 as an operation unit disposed outside the housing, and the other end of the leg operation lever 115 is disposed inside the housing 113 and the left and right sides of the slider 114. A pair of connecting portions 115b to be connected to the protrusions 114c is formed. Each of the connecting portions 115b is formed with a long hole 115c, and the projection 114c of the corresponding slider 114 is disposed therein. Cylindrical rotation support protrusions 115d are formed on the left and right sides of the intermediate portion of the leg operation lever 115, respectively. The leg operating lever 115 is attached to the inside of the housing 113 by the left and right rotation support protrusions 115d, so that the leg operation lever 115 can rotate around the rotation axis extending in the lateral direction.

  With the positioning mechanism 110 attached to the leg 101, the slider 114 is biased toward the leg 101 by the coil spring 116. Therefore, the fixing member 117 is inserted into any one of the through holes 103a of the first cylindrical member 102 and the second cylindrical member 103, and the second cylindrical member 103 with respect to the first cylindrical member 102 is inserted. Sliding is regulated. In addition, although the 1st cylindrical member 102, the 2nd cylindrical member 103, and the fixing member 117 are formed from metals, such as carbon steel, it is not limited to this.

  When adjusting the length of the leg portion 101, first, the operation tab 115a of the leg portion operation lever 115 is lifted upward, that is, operated upward, so that it rotates around the rotation axis of the rotation support projection 115d. Let In this operation, for example, the first tubular member 102 above the positioning mechanism 110 is grasped with the right hand extending from above to below, and the operation tab 115a is hooked from below with the thumb of the right hand and lifted upward. By doing. Further, when the operation of rotating the operation tab 115a of the leg operation lever 115 is continued, the operation tab 115a moves in the direction of the leg 101 by the rotational movement.

  As the operation tab 115a rotates, the connecting portion 115b at the other end of the leg operation lever 115 rotates in a direction away from the leg 101. The slider 114 slides along the guide wall 111a in a direction away from the leg portion 101 by the rotational movement of the connecting portion 115b. That is, the connecting portion 115b of the leg portion operating lever 115 rotates, while the movement of the slider 114 is restricted in the sliding direction by the guide wall 111a. However, the left and right protrusions 114c of the slider 114 move in the long holes 115c according to the rotational position of the corresponding connecting portion 115b, so that the rotating motion of the connecting portion 115b is not hindered. Is converted into a sliding motion of the slider 114. In other words, the shape of the long hole 115c of the connecting portion 115b is determined so that this movement conversion is performed smoothly.

  When the slider 114 slides in a direction away from the leg portion 101, the fixing member 117 attached integrally with the slider 114 becomes the through hole 102 a of the first cylindrical member 102 and the through hole of the second cylindrical member 103. The length of the leg 101 can be adjusted by being pulled out from 103a. At this time, the right hand holds the first tubular member 102, but the left hand can be used freely.

  Next, the leg portion 101 is adjusted to a desired length by sliding the second tubular member 103 with respect to the first tubular member 102 using, for example, the left hand, and the first tubular member 102 is penetrated. One through hole 103a of the hole 102a and the second cylindrical member 103 is aligned. In this state, when the force applied to the operation tab 115 a of the leg operation lever 115 is released, the slider 114 slides in the direction of the leg 101 by the urging force of the coil spring 116. As a result, the fixing member 117 of the leg operation lever 115 is inserted into the through hole 102a of the first cylindrical member 102 and the through hole 103a of the second cylindrical member 103, and the operation tab 115a of the leg operation lever 115 is Return to the original position. That is, it can be said that the slider 114 can slide between a fixed position where the expansion and contraction of the leg 101 is fixed and a release position where the fixing is released.

  To summarize the positioning mechanism 110 of the support leg 100, when the operation tab 115 a rotates the leg operation lever 115 in the direction in which the operation tab 115 a approaches the leg 101, the connecting section 115 b moves in the direction away from the leg 101 to move the slider 114. Slide to the release position. On the other hand, when the leg operation lever 115 is rotated in a direction in which the operation tab 115a is separated from the leg 101, the connecting part 115b is moved in a direction approaching the leg 101 to slide the slider 114 to the fixed position.

  The positioning mechanism 110 described above can grip one leg 101 and slide the slider 114 to the release position with one hand, so that the other hand can be used freely. The length of the leg 101 can be adjusted with a simple operation while gripping the other of the two. Further, in order to adjust the length of the leg 101, first, the operation tab 115a of the leg operation lever 115 must be operated upward, so that the infant is supposed to operate the operation tab of the leg operation lever 115. Even if the step 115a is stepped on from above, the slider 114 does not unintentionally enter the release position.

  By the way, as described above, the child seat 1 is a seat belt type child seat. Therefore, the seat belt of the seat belt device provided in the vehicle seat is used for fixing the child seat 1 to the vehicle seat.

  36 is another perspective view of the cradle 20 of the child seat 1 of FIG. 1, and FIG. 37 is a perspective view of the lower half 150 of the cradle 20 of FIG. The cradle 20 is formed by fitting a lower half body 150 and an upper half body 151 formed separately from each other. That is, the lower half body 150 forms the bottom surface of the base portion 21 including the cylindrical curved surface 25 and the back surface of the upright portion 22, and the upper half body 151 includes the upper surface of the base portion 21 including the cradle support surface 24 and the front surface of the upright portion 22. Form.

  FIG. 36 shows a lock-off device 130 that is a well-known clamping mechanism that can clamp a vehicle seat belt, which is omitted in the above description. Since the lock-off device 130 is disposed on the left and right sides of the front surface of the upright portion 22 of the cradle 20, that is, the front surface of the upper half 151, the seat belt disposed on either the left or right side of the child seat 1 can be used. It can be held by the off device 130. Accordingly, the child seat 1 is firmly attached to the vehicle seat by the seat belt stretched so as to pass through the front surface of the upright portion 22 being sandwiched and fixed by the lock-off device 130. In FIG. 36, the lock-off device 130 on the right side is omitted.

  Next, an ISOFIX type child seat manufactured in conformity with the ISOFIX or ISO-FIX (Isofix) standard will be described.

  FIG. 38 is a perspective view of a child seat 200 according to the second embodiment of the present invention, and FIG. 39 is a perspective view of the lower half 250 of the cradle 220 of FIG. In FIG. 38, the sheet main body 30 is omitted.

  The child seat 200 according to the second embodiment is different from the child seat 1 according to the first embodiment described above only in the configuration of the cradle, and includes the seat body 30, and further includes a reclining mechanism and a rotation mechanism. The configuration is the same. Therefore, also in the child seat 200 according to the second embodiment, the seat body 30 is supported on the receiving table 220 so as to be able to change between a plurality of reclining positions with different inclination angles, and is rotatable at each reclining position. It is supported on the cradle 220.

  The cradle 220 according to the second embodiment is formed by molding hard plastic, for example, polypropylene, for each of the upper and lower halves or for each of the left and right halves, and is not limited thereto. The pedestal 220 of the child seat 200 according to the second embodiment is formed by fitting the lower half body 250 and the upper half body 251 formed separately. That is, the lower half body 250 forms the bottom surface of the base portion 221 including the cylindrical curved surface 25 and the back surface of the upright portion 222, and the upper half body 251 includes the upper surface of the base portion 221 including the cradle support surface 24 and the front surface of the upright portion 222. Form.

  The cradle 220 includes a coupling mechanism 300 that conforms to the ISOFIX standard. The connection mechanism 300 includes a pair of rod-shaped arm members 301 and a connection member 302 attached to each tip of the arm member 301. As shown in FIG. 38, an opening 402 is formed at a position corresponding to each of the connecting members 302 of the arm member 301 at the lower portion of the back portion 401 of the vehicle seat 400 that fixes the child seat 200. The anchor member 403 is disposed on the side. The anchor member 403 is a rod-like member arranged so as to cross the opening 402 from side to side. The connecting member 302 of the arm member 301 is configured to be connected so as to surround the rod-shaped anchor member 403 of the vehicle seat 400 and to be released so as to release the surrounding.

  The arm member 301 is configured such that it can be retracted into the child seat 200, that is, into the cradle 220, or pulled out of the cradle 220. That is, as shown in FIG. 39, rail members 303 are arranged on the left and right sides of the bottom surface of the lower half 250 of the cradle 220, particularly on the left and right sides of the cylindrical curved surface 25, so as to extend in the front-rear direction of the cradle 220. Has been. The rail member 303 holds the arm member 301 slidably along the axis of the arm member 301. A hole (not shown) is formed in the rear portion of the lower half 250 of the cradle 220. Each of the arm members 301 can protrude rearward from the cradle 220 through the hole. Moreover, the rail member 303 has a locking mechanism (not shown) so that the arm member 301 can be protruded from the cradle 220 by an arbitrary length and fixed. Thereby, each of the arm members 301 can adjust the protruding amount from the receiving table 220 separately. In FIG. 39, the right arm member 301 is omitted.

  When the ISOFIX child seat 200 is fixed to the vehicle seat 400, first, the arm member 301 is pulled out from the child seat 200, that is, from the cradle 220. Next, the connecting member 302 at the tip of the arm member 301 is connected to the anchor member 403 of the vehicle seat 400. Next, by retracting the arm member 301 into the child seat 200, the rear surface of the standing portion 222 of the child seat 200, in particular, the pedestal 220 is brought into close contact with the back portion 401 of the vehicle seat 400, and the fixing of the child seat 200 is completed.

  In summary, in the child seat 1 according to the first embodiment that is a seat belt type, the lock-off device 130 that is a clamping mechanism is disposed outside the cradle 20, whereas the child seat 1 is an ISOFIX type. In the child seat 200 according to the second embodiment, the coupling mechanism 300 is disposed inside the cradle 220. In addition, although the connection mechanism 300 and the anchor member 403 based on the ISOFIX standard are mainly formed from a metal such as carbon steel, the present invention is not limited to this.

  As described above, the child seat 200 according to the second embodiment is different from the child seat 1 according to the first embodiment only in the configuration of the cradle, and the other configurations are the same. This is realized by arranging the reclining mechanism and the rotating mechanism in a concentrated manner in the vicinity of the seat lower portion 31 of the seat body 30, and particularly in the vicinity of the center in the lateral direction inside the cradle like the cylindrical curved surface 25. That is, by arranging the reclining mechanism and the rotation mechanism in such a manner, the coupling mechanism 300 can be arranged in the cradle 220 without interfering with other members.

  In other words, according to the present invention, in the child seat 1 according to the first embodiment and the child seat 200 according to the second embodiment, all components other than the cradle can be shared, and the number of components is increased. And it becomes possible to suppress the increase in a manufacturing process. In addition, at the time of manufacturing, the seat belt type child seat 1 and the ISOFIX type child seat 200 are selectively manufactured by switching between the cradle 20 of the first embodiment and the cradle 220 of the second embodiment. Therefore, it is easy to adjust the schedule of the assembly line, and the manufacturing cost can be reduced.

  Further, according to the present invention, it is easy to increase variations in the seat belt type child seat 1 and the ISOFIX type child seat 200. For example, if the seat main body 30 capable of adjusting the height of the head plate 60 and the seat main body 30 to which the head plate 60 is fixed are prepared, the seat belt type child seat 1 and the ISOFIX type child seat 200 can be combined with each other. In total, four variations can be easily obtained. Similarly, variations can be further increased depending on the presence or absence of the hood mechanism 80, the number of movable hood stays of the hood mechanism 80, and the like.

  Although the child seat which concerns on embodiment mentioned above was a type which has a reclining mechanism and a rotation mechanism, you may apply this invention to the child seat which does not have any one or both of a reclining mechanism and a rotation mechanism. Further, since the standing portion 222 of the cradle 220 according to the second embodiment does not require space and strength for disposing the lock-off device 130, it is compared with the erected portion 22 of the cradle 20 according to the first embodiment. Thus, the lateral width of the upright portion 222 may be reduced, or the height of the upright portion 222 may be reduced. Furthermore, by disposing the lock-off device 130 on the cradle 220 of the second embodiment, a child seat having features of both a seat belt type and an ISOFIX type can be obtained.

In addition, although the material of the main components was mentioned suitably, the material of the component which was not mentioned is mainly formed by integrally molding resin materials, such as a polypropylene and a polyacetal. However, other materials or manufacturing methods may be employed.
Although the present invention has been described in detail based on specific embodiments, those skilled in the art can make various changes and modifications without departing from the scope and spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Child seat 200 Child seat 10 Child seat main body 20 Receiving stand 220 Receiving stand 30 Seat main body 130 Lock-off device 300 Connection mechanism 301 Arm member 302 Connecting member 403 Anchor member

Claims (11)

Any one of a first cradle having a clamping mechanism capable of clamping a seat belt of a vehicle and a second cradle having a coupling mechanism connectable to an anchor member of the vehicle;
A child seat comprising: a seat body configured to be slidably supported on the first cradle and the second cradle.   The child seat according to claim 1, wherein the clamping mechanism is disposed outside the first cradle, and the connecting mechanism is disposed inside the second cradle.   The child seat according to claim 2, wherein the coupling mechanism has a rod-shaped arm member that can protrude rearward from the second cradle.   The child seat according to claim 3, wherein the connecting mechanism includes a pair of left and right arm members.   The seat body is supported on the cradle so as to be able to change between a plurality of reclining positions with different inclination angles, and is supported on the cradle so as to be rotatable at each of the reclining positions. The child seat according to any one of claims 1 to 4. A reclining lock member that protrudes forward and backward toward the cradle and engages or disengages from the cradle; and a seat body that protrudes forward and backward toward the cradle and A rotation lock member engaged or disengaged with
When changing the reclining position of the seat body, disengage the reclining lock member from the cradle,
6. The child seat according to claim 5, wherein when the seat main body is rotated, the rotation lock member is disengaged from the cradle. The cradle has an engaging portion;
The seat body has an engaged portion that engages with the engaging portion,
The child seat according to claim 6, wherein the engagement between the engaging portion and the engaged portion is maintained when the reclining position of the seat body is changed and the seat body is rotated. .   The child seat according to claim 7, wherein the engaged portion is formed in an annular shape or a disk shape around a rotation axis of the seat body. The engaged portion is a lower engaged portion disposed at a lower end portion of the seat body and an upper engaged portion disposed above the lower engaged portion,
The child seat according to claim 8, wherein the engaging portion is a connecting member that connects the upper engaged portion and the lower engaged portion.   The child seat according to any one of claims 7 to 9, wherein the engaging portion moves in the front-rear direction following the change in the reclining position of the seat body.   The child seat according to any one of claims 7 to 10, wherein the engagement between the engaging portion and the engaged portion is performed behind the seat body.

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