JP5650452B2 - Child seat structure - Google Patents

Description

  The present invention relates to a seat structure for a childcare device, and more particularly to a seat structure for a reclinable childcare device.

  A typical example of a child-care device used for sleeping or sitting an infant is an automobile child seat. Various types of products have been developed so far, such as child seats equipped with a reclining mechanism and those equipped with a mechanism capable of switching between forward use and backward use. As conventional child seats, for example, JP-A-10-250426 (Patent Document 1) and JP-A-2002-301965 (Patent Document 2) are disclosed.

  The child seat disclosed in Patent Document 1 includes a seat device including a seat portion and a backrest portion connected to the seat portion so as to be reclining, and left and right armrest portions that rise in the vertical direction. A support device for supporting, and a seat base portion for supporting the support device so as to be rotatable about a seat rotation axis extending in the vertical direction. The backrest portion and the left and right armrest portions are connected to each other via a connecting shaft (pin bolt) so as to be rotatable. The seat and the left and right armrests are slidably connected to each other via a protrusion provided on the seat and a guide groove provided to extend in the front-rear direction on the left and right armrests. Has been. When the backrest portion is rotated about the connecting shaft, the seat portion moves relative to the armrest portion forward, so that the backrest portion can be reclined to a bed state position. . Further, by rotating the support device around the seat rotation axis on the seat base portion, the direction of the seat device can be changed to the front, rear, and side. According to this configuration, it is possible to provide a child seat that can be used consistently from the time of a newborn and an infant without a neck to the time of an infant and a schoolchild who have grown to a certain extent.

  Moreover, the child seat described in Patent Document 2 includes a cradle, a reclining base that is slidably connected to the cradle only in the front-rear direction, and an axis perpendicular to the upper surface of the reclining base. And a seat body connected to be rotatable around. On the upper surface of the cradle, a groove-like rail provided in a curved shape so as to decrease in height toward the front is formed. Moreover, the convex rail which engages with a groove-shaped rail is provided in the lower surface of the reclining base. When the reclining base is slid forward with respect to the cradle, the seat body is configured to recline integrally according to the shape of the grooved rail. Further, by rotating the seat body on the reclining base, the direction of the seat body can be changed to the front and rear. According to this configuration, since the seat body can be reliably supported with respect to the cradle, the seat body can be prevented from inadvertently moving during a collision or the like.

Japanese Patent Laid-Open No. 10-250426 JP 2002-301965 A

  In the seat structure of a child seat, from the viewpoint of improving safety against a frontal collision accident, the head of the seated infant is located farther from the front side of the vehicle body of the vehicle, that is, the rear seat of the vehicle in both the forward and rearward usage modes. Arranging at a position closer to the seat back portion is a very important factor for protecting infants. Therefore, the structure which can arrange | position the backrest part of a child seat more to the vehicle body rear side is needed in both the forward-looking and the back-facing usage forms. The child seat described in Patent Document 1 connects a backrest portion and a support device that supports the backrest portion via a connecting shaft fixed to the supporting device, and rotates the backrest portion around the connecting shaft. This makes it possible to recline the backrest. Therefore, in order to make the child seat a rearward use form and to make the reclining angle of the backrest part suitable for the rearward use form, if the backrest part is tilted backward to the rear side, that is, the front side of the vehicle body, it is inevitably necessary The part moves to the front side of the vehicle body. Such a configuration is not preferable from the viewpoint of infant safety as described above.

  Moreover, in the child seat described in Patent Document 1, as described above, the connecting shaft that connects the backrest and the support device is fixed. Therefore, in a state in which the backrest portion is attached to the support device, the distance between the connecting shaft that is the rotation center of reclining of the backrest portion and the seat rotation shaft is fixed. For this reason, when the mounting position of the backrest portion is positioned so that the backrest portion is arranged on the rear side of the vehicle body in either the forward-facing or the rear-facing usage mode, the backrest portion is centered on the seat rotation axis from the mounting position. In the other usage mode, which is rotated 180 °, the backrest portion is inevitably disposed on the front side of the vehicle body.

  As described above, the conventional child seat having a structure in which the backrest portion is reclined around one fixed axis is the optimum reclining angle in terms of safety and comfort in both forward-facing use and backward-facing use. It was impossible to make up.

  In the case of the child seat described in Patent Document 2, the entire seat body reclines along with the reclining base according to the shape of the grooved rail provided on the cradle. The baby's head does not move to the front side of the vehicle body. However, since the seat body is integrally formed, it is impossible to place the child seat in the bed state. Therefore, the child seat described in Patent Document 2 cannot be used consistently from the time of newborns and infants without a neck to the time of infants and schoolchildren that have grown to a certain extent. Moreover, the child seat described in Patent Document 2 cannot rotate the backrest portion with respect to the seat portion because of its structure. Therefore, it is impossible to create an optimal angle and arrangement between the backrest and the seat from the viewpoint of safety and comfort, depending on the forward or rearward usage pattern.

  In view of the above problems, the object of the present invention is to be able to be used consistently from the period of newborns and infants to the period of infants and schoolchildren, and can be used in any form according to the age of infants. It is to provide a seat structure for a childcare device that can realize an optimal seat arrangement from the viewpoint of safety and comfort.

  The seat structure of the child-care instrument according to the present invention includes a seat base portion and a backrest portion that is connected to the seat base portion so as to be able to tilt backward via a first connection shaft and a second connection shaft. Here, the first connecting shaft is attached to either the seat base portion or the backrest portion, and the other member has a first guide groove that receives the first connecting shaft and guides the movement of the first connecting shaft. It is formed. The second connecting shaft is attached to either the seat base portion or the backrest portion, and the other member is formed with a second guide groove for receiving the second connecting shaft and guiding the movement of the second connecting shaft. Has been.

  According to this configuration, the backrest portion is locked to the seat base portion via the first and second connecting shafts and the first and second guide grooves, and the extending direction of the first and second guide grooves is Accordingly, the backrest portion can be moved relative to the seat base portion. As a result, by appropriately designing the arrangement of the first and second guide grooves, the position of the backrest and the reclining angle can be arbitrarily created, so that safety and comfort can be achieved depending on the usage mode such as forward or backward. It is possible to realize the arrangement of the backrest part suitable for the performance.

  Preferably, when the backrest portion tilts from the first rearward tilt position to the second rearward tilt position, the first connecting shaft is guided to move from one end to the other end of the first guide groove, and the first The two connecting shafts are guided so as to move from one end of the second guide groove to the other end.

  According to this configuration, when the backrest is at the first rearward tilt position or the second rearward tilt position, the first connecting shaft is locked to the end of the first guide groove, and the second The connecting shaft is locked to the end portion of the second guide groove. As a result, when the backrest portion is at the first rearward tilt position or the second rearward tilt position, the contact area between the connecting shaft and the guide groove wall surface can be increased, so the backrest portion can be used as the seat base portion. The locking strength can be improved. Therefore, the impact durability of the child seat at the time of a collision accident can be improved.

  Preferably, the first guide groove extends in a curved shape so as to project upward, and the second guide groove is provided so as to extend in a curved shape so as to project rearward.

  According to this configuration, the first and second connecting shafts move smoothly in a curved shape along the first and second guide grooves. Therefore, the backrest can be tilted more smoothly from the first rearward tilt position to the second rearward tilt position.

  Preferably, the first connecting shaft is attached to the backrest portion, the first guide groove is formed in the seat base portion, the second connecting shaft is attached to the seat base portion, and the second guide groove is the backrest. It is formed in the part.

  More preferably, the first guide groove extends in a curved shape so as to protrude upward from the rear end to the front end positioned on the front lower side of the rear end, and the second guide groove extends from the upper end to the lower end. It extends in a curved shape so as to protrude rearward. When the backrest portion tilts from the first rearward tilt position to the second rearward tilt position, the first connection shaft is guided to move from the rear end to the front end of the first guide groove, and the second connection The shaft is guided so as to move from the lower end to the upper end of the second guide groove.

  According to this configuration, when the backrest portion is tilted from the first rearward tilt position to the second rearward tilt position, the first connecting shaft moves toward the front lower side along the first guide groove. That is, the backrest part moves forward and downward together with the first connecting shaft. At the same time, the backrest portion is locked at a predetermined position of the seat base portion while allowing the backrest portion to move forward and downward by the second connecting shaft and the second guide groove attached to the seat base portion. Accordingly, when the backrest portion tilts from the first rearward tilt position to the second rearward tilt position, the backrest portion tilts rearward with respect to the seat base portion while moving to the front lower side. Therefore, it is possible to recline the backrest portion without shifting from the position of the backrest portion at the first rearward tilt position to the back side.

  Preferably, a seat portion connected to the backrest portion via a first connecting shaft is further provided. And the seat part and the seat base part are connected via the 3rd connection shaft. The third connecting shaft is attached to either the seat portion or the seat base portion, and the other member extends in the front-rear direction to receive the third connecting shaft and guide the movement of the third connecting shaft. A third guide groove is formed.

  More preferably, the third connecting shaft is attached to the seat portion, and the third guide groove is formed in the seat base portion.

  According to this configuration, the seat portion follows the movement of the backrest portion tilting from the first rearward tilt position to the second rearward tilt position while moving the front lower side, and follows the extending direction of the third guide groove. Move forward. That is, by appropriately designing the position and the extending direction of the third guide groove, it is possible to optimize the angle between the backrest portion and the seat portion at the first rearward tilt position and the second rearward tilt position. . Accordingly, it is possible to create an optimal backrest portion and seat portion arrangement in forward and backward use forms.

  Preferably, the seat base portion is further provided with a fourth guide groove that extends upward from the front end of the first guide groove and guides the upward movement of the first connection shaft. Is moved to the upper end of the fourth guide groove, the backrest portion is tilted to the maximum rearward tilt position, and the child-care instrument is in a bed state.

  According to this configuration, the backrest portion is moved by a series of operations of moving the first connecting shaft from the rear end to the front end of the first guide groove and then moving from the front end of the first guide groove to the upper end of the fourth guide groove. The reclining can be performed stepwise from the first rearward tilt position to the second rearward tilt position and then to the maximum rearward tilt position. Therefore, the user can change the form of the child seat from the forward use form to the backward use form and then to the bed form by an easy operation. This makes it possible to use consistently from the time of small newborn infants and infants who often use childcare equipment in bed to the time of infants and schoolchildren who often use childcare equipment in a chair state. It becomes.

  When the first connecting shaft moves from the lower end to the upper end of the fourth guide groove, the second connecting shaft may be guided so as to move from the upper end to the lower end of the second guide groove. The fourth guide groove may extend in a curved shape so as to protrude forward from the lower end to the upper end.

  Preferably, the child-care instrument is a child seat applied to an automobile. According to this configuration, it can be used consistently from the time of newborns and infants to the time of infants and schoolchildren. A child seat that can ensure the safety of the infant and can comfortably seat the infant can be realized.

  According to the present invention, the backrest portion is locked to the seat base portion via the first and second connecting shafts, the first and second guide grooves, and the extending direction of the first and second guide grooves. Accordingly, the backrest portion can be moved relative to the seat base portion. As a result, by appropriately designing the arrangement of the first and second guide grooves, the position of the backrest and the reclining angle can be arbitrarily created, so that safety and comfort can be achieved depending on the usage mode such as forward or backward. It is possible to realize the arrangement of the backrest part suitable for the performance.

It is a whole perspective view of the child seat concerning one embodiment of the present invention. It is a disassembled perspective view of the child seat shown in FIG. It is a whole perspective view of a backrest part concerning one embodiment of the present invention. It is the side view which looked at the backrest part shown in FIG. 3 from the right side. It is the top view which looked at the backrest part shown in FIG. 3 from upper direction. It is a whole perspective view of the seat base part concerning one embodiment of the present invention. It is the side view which looked at the seat base part shown in FIG. 6 from the right side. It is the side view which looked at the seat base part shown in FIG. 6 from the left side. It is the top view which looked at the seat base part shown in FIG. 6 from upper direction. It is a whole perspective view of the seat which concerns on one Embodiment of this invention. It is a front view of the seat part shown in FIG. It is the side view which looked at the seat part shown in FIG. 10 from the right side. It is the side view which looked at the child seat in case a backrest part exists in the 1st back tilt position from the right side. It is the side view which looked at the child seat at the time of tilting the backrest part from the 1st back tilt position to the 2nd back tilt position from the right side. It is the side view which looked at the child seat at the time of tilting the backrest part to the maximum back tilt position from the right side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The actual child seat is a flexible member such as urethane foam that absorbs the impact of the surface of the hard core member that constitutes the skeleton of the child seat in order to ensure the safety and comfort of the infant sitting. It is covered with a member having the property. However, in the following description, from the viewpoint of easy understanding, these shock absorbing members are not shown, and only the core member constituting the child seat skeleton is shown to explain the present invention.

  First, the schematic configuration of the child seat 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an overall perspective view of a child seat 11 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the child seat 11 shown in FIG. In the following description, front and rear, left and right, and up and down directions are based on directions viewed from an infant seated on the child seat 11.

  The child seat 11 according to an embodiment of the present invention includes a seat 12 that supports a seated infant (not shown) from below, a backrest 13 that supports the seated infant from the back, a seat 12 and a backrest 13. And a seat base portion 14 that supports the seat from below. The seat portion 12 is rotatably connected to the lower end of the backrest portion 13 via the first connecting shaft 15. The backrest portion 13 is connected to the seat base portion 14 via a first connecting shaft 15 and a second connecting shaft 16 provided on the seat base portion 14. Specifically, the seat base portion 14 is formed with a first guide groove 17 and a fourth guide groove 35 for receiving the first connecting shaft 15 so as to be continuous in a substantially V shape. 17 and the fourth guide groove 35 receive and hold the first connecting shaft 15 inside. The backrest portion 13 is formed with a second guide groove 18 for receiving the second connecting shaft 16, and the second guide groove 18 receives and holds the second connecting shaft 16 therein. The seat portion 12 is connected to the seat base portion 14 via a third connecting shaft 19 provided in the seat portion 12. Specifically, in the seat base portion 14, a third guide groove 20 that receives the third connection shaft 19 is formed on the front side of the first guide groove 17, and the third guide groove 20 is a third connection groove. The shaft 19 is received and held inside. Thus, the seat part 12, the backrest part 13, and the seat base part 14 are mutually connected via the 1st-3rd connection shaft and the 1st-4th guide groove.

  Next, the structure of the backrest part 13 which concerns on this embodiment is demonstrated using FIGS. FIG. 3 is an overall perspective view of the backrest 13 according to the present embodiment. FIG. 4 is a side view of the backrest 13 shown in FIG. 3 as viewed from the right side. FIG. 5 is a top view of the backrest 13 shown in FIG. 3 as viewed from above.

  Referring to FIGS. 3 to 5, the backrest portion 13 extends in the vertical direction, and a back wall portion 21 that comes into contact with the back of the infant to be seated, and the left and right end portions of the back wall portion 21 toward the front. The left and right side wall portions 22 and 23 extend. The left and right side wall portions 22 and 23 are provided so as to extend from the lower end to the upper end of the back wall portion 21. Further, the back wall portion 21 and the left and right side wall portions 22 and 23 are integrally formed so as to be smoothly connected to each other in order to improve the comfort of the sitting infant. A through hole 25 penetrating in the left-right direction is provided in the lower end portion 24 of the back wall portion 21. The first connecting shaft 15 is inserted into the through hole 25.

  A left second guide groove 18a that extends in a curved shape in the vertical direction is provided slightly below the center of the left side wall portion 22, and extends in a curved shape in the vertical direction at the center and slightly below the right wall portion 23. A right second guide groove 18b is provided. The left second guide groove 18 a is provided from the upper end 26 to the lower end 27 so as to have a curved shape that protrudes rearward, that is, on the back side of the backrest portion 13. Similarly, the right second guide groove 18b is provided so as to have a curved shape that projects from the upper end 28 to the lower end 29 on the back side of the backrest portion 13. In the present embodiment, the left and right second guide grooves 18a and 18b are provided at the same position in the left and right side wall portions 22 and 23 so as to be symmetrical to each other, and both penetrate through the left and right side wall portions 22 and 23. It is a groove.

  Next, the structure of the seat base part 14 which concerns on this embodiment is demonstrated using FIGS. FIG. 6 is an overall perspective view of the seat base portion 14 according to the present embodiment. FIG. 7 is a side view of the seat base portion 14 shown in FIG. 6 as viewed from the right side. FIG. 8 is a side view of the seat base portion 14 shown in FIG. 6 as viewed from the left side. FIG. 9 is a top view of the seat base portion 14 shown in FIG. 6 as viewed from above.

  With reference to FIGS. 6 to 9, the seat base portion 14 includes a bottom wall portion 28, left and right armrest portions 29 and 30 that rise upward from left and right side end portions of the bottom wall portion 28, and a front end of the bottom wall portion 28. From the left armrest part 29 to the right armrest part 30 and from the left armrest part 29 to the right armrest part 30 and from the rear end part of the bottom wall part 28 to the upper side. And a rear wall portion 32 extending.

  A right first guide groove 17b and a right fourth guide groove 35b are provided on the lower side of the center of the right armrest portion 30 so as to be connected to each other in a substantially V shape. More specifically, the right first guide groove 17b extends from the rear end 33 to the front end 34 positioned on the front lower side of the rear end 33 so as to have a curved shape protruding upward. . The right fourth guide groove 35b extends from the front end 34 of the right first guide groove 17b to an upper end 36 located on the front upper side of the front end 34 so as to have a curved shape protruding forward. Yes. The right first guide groove 17b and the right fourth guide groove 35b are through grooves having the same width.

  A right third guide groove 20b extending in the front-rear direction is further provided on the front side of the right fourth guide groove 35b. The right third guide groove 20b is provided so as to extend substantially linearly from the rear end 38 to the front end 39 positioned on the front upper side of the rear end 38. Further, a notch 37 is provided at the front end 39 of the right third guide groove 20b so as to be recessed upward from the front end 39.

  On the inner wall surface 40 of the right arm rest portion 30, a right second connecting shaft 16b is provided so as to protrude toward the inner side of the seat base portion 14, that is, toward the opposing left arm rest portion 29. More specifically, the right second connecting shaft 16b is disposed on the rear upper side of the rear end 33 of the right first guide groove 17b, and substantially extends from the inner wall surface 40 of the right arm rest 30 toward the left arm rest 29. It is a rod-shaped member provided so as to extend horizontally.

  Similar to the right armrest portion 30, a left first guide groove 17a and a left fourth guide groove 35a are provided on the lower center side of the left armrest portion 29 so as to be connected to each other in a substantially V shape. Specifically, the left first guide groove 17a extends from the rear end 41 to the front end 42 located on the front lower side of the rear end 41 so as to have a curved shape protruding upward. The left fourth guide groove 35a extends from the front end 42 of the left first guide groove 17a to the upper end 43 positioned on the front upper side of the front end 42 so as to have a curved shape projecting forward. Yes. The left first guide groove 17a and the left fourth guide groove 35a are through grooves having the same width.

  A left third guide groove 20a extending in the front-rear direction is further provided on the front side of the left fourth guide groove 35a. The left third guide groove 20 a is provided so as to extend substantially linearly from the rear end 44 to the front end 45 located on the front upper side of the rear end 44. Further, a notch 46 is provided at the front end 45 of the left third guide groove 20a so as to be recessed upward from the front end 45.

  The inner wall surface 47 of the left armrest part 29 is provided with a left second connecting shaft 16a provided so as to protrude toward the opposing right armrest part 30 side. More specifically, the left second connecting shaft 16a is disposed on the upper rear side of the rear end 41 of the left first guide groove 17a, and is substantially directed from the inner wall surface 47 of the left armrest portion 29 toward the right armrest portion 30 side. It is a rod-shaped member provided so as to extend horizontally.

  In the present embodiment, the left and right first guide grooves 17a and 17b, the left and right third guide grooves 20a and 20b, the left and right fourth guide grooves 35a and 35b, and the left and right second connecting shafts 16a and 16b are: The left and right armrest portions 29 and 30 are provided at the same position so as to be symmetrical with each other.

  As shown in FIG. 1, the left and right armrest portions 29, 30 are arranged on the outer side of the backrest portion 13 so as to be in contact with and overlap the outer wall surfaces of the left and right side wall portions 22, 23 of the backrest portion 13 when assembled to the child seat 11. It is arranged on the side. With this configuration, it is possible to protect an infant by a dual structure of an armrest portion provided on the seat base portion 14 and a side wall portion provided on the backrest portion 13 against a collision of the seated infant from the left and right directions. It becomes. Accordingly, the shape and thickness of the backrest portion 13 and the shapes, heights, thicknesses, and the like of the left and right armrest portions 29 and 30 are appropriately set in consideration of the strength against a collision from the left and right directions.

  Next, the structure of the seat part 12 which concerns on this embodiment is demonstrated using FIGS. FIG. 10 is an overall perspective view of the seat 12 according to the present embodiment. FIG. 11 is a front view of the seat 12 shown in FIG. FIG. 12 is a side view of the seat 12 shown in FIG. 10 as viewed from the right side.

  Referring to FIGS. 10 to 12, the seat portion 12 includes a bottom wall portion 48 that comes into contact with the buttocks of the infant to be seated, and a left and right side that rises upward and outward from the left and right end portions of the bottom wall portion 48. Side wall portions 49 and 50. The bottom wall portion 48 and the left and right side wall portions 49 and 50 are integrally formed so as to be smoothly connected to each other in order to improve the comfort of the sitting infant.

  A connecting shaft mounting portion 52 that protrudes downward from the lower surface 51 is provided at the left end of the lower surface 51 of the bottom wall portion 48, and the left third connecting shaft 19 a is located outward from the connecting shaft mounting portion 52. It is attached so as to extend substantially horizontally. Similarly, a connecting shaft mounting portion 53 that protrudes downward from the lower surface 51 is provided at the right end portion of the lower surface 51, and the right third connecting shaft 19 b is substantially horizontally outward from the connecting shaft mounting portion 53. It is attached to extend. The connecting shaft attaching portions 52 and 53 are provided at the front side in the front-rear direction of the bottom wall portion 48 and slightly forward, and are integrally formed with the bottom wall portion 48.

  At the rear end of the right end portion of the bottom wall portion 48, a connecting shaft insertion portion 55 that protrudes toward the rear side is provided. A through groove 57 that extends substantially linearly in the front-rear direction from the rear end 60 to the front end 61 is formed in the central portion of the connecting shaft insertion portion 55. Similarly, a connecting shaft insertion portion 54 that protrudes rearward is provided at the rear end of the left end portion of the bottom wall portion 48, and the connecting shaft insertion portion 54 has a longitudinal direction from the rear end 58 to the front end 59. A through groove 56 extending substantially linearly is formed.

  Next, the assembly structure of the child seat 11 according to the present embodiment will be described in detail with reference to FIGS. With reference to FIGS. 1-12, the through-hole 25 provided in the lower end part 24 of the backrest part 13 and the through-grooves 56 and 57 provided in the connection shaft insertion parts 54 and 55 of the seat part 12 communicate. As described above, the lower end portion 24 of the backrest portion 13 is disposed in the space between the connecting shaft insertion portion 54 and the connecting shaft insertion portion 55. The first connecting shaft 15 is inserted so as to penetrate the through hole 25 and the through grooves 56 and 57. Thus, the seat portion 12 is rotatably connected to the lower end portion 24 of the backrest portion 13 via the first connecting shaft 15.

  Here, the first connecting shaft 15 is configured to be longer than the width between the inner wall surface 47 of the left arm rest portion 29 of the seat base portion 14 and the inner wall surface 40 of the right arm rest portion 30. Then, the left end portion of the first connecting shaft 15 is inserted and held in the left first guide groove 17a and the left fourth guide groove 35a provided so as to be connected to the left armrest portion 29 in a substantially V shape. . Similarly, the right end portion of the first connecting shaft 15 is inserted and held in the right first guide groove 17b and the right fourth guide groove 35b that are provided in the right armrest portion 30 so as to be substantially V-shaped. The In this way, the lower end portion 24 of the backrest portion 13 and the connecting shaft insertion portions 54 and 55 corresponding to the rear end portion of the seat portion 12 are locked to the seat base portion 14 via the first connecting shaft 15. The

  The left second connecting shaft 16a provided on the inner wall surface 47 of the left armrest portion 29 of the seat base portion 14 is inserted into the left second guide groove 18a provided on the left wall portion 22 of the backrest portion 13. At the same time, the right second connecting shaft 16 b provided on the inner wall surface 40 of the right arm rest 30 is inserted into the right second guide groove 18 b provided on the right wall 23 of the backrest 13. In this way, the backrest 13 is locked to the seat base 14 via the second connecting shaft 16 and the second guide groove 18. That is, the backrest portion 13 is locked to the seat base portion 14 through the two shafts of the first connecting shaft 15 and the second connecting shaft 16 as described above.

  The left third connecting shaft 19a attached to the connecting shaft attaching portion 52 of the seat portion 12 is inserted and held in the left third guide groove 20a provided in the left armrest portion 29 of the seat base portion 14. At the same time, the right third connecting shaft 19 b attached to the connecting shaft attaching portion 53 of the seat portion 12 is inserted and held in the right third guide groove 20 b provided in the right arm rest portion 30. Thus, the seat portion 12 is locked to the seat base portion 14 via the first connecting shaft 15 and the third connecting shaft 19.

  As described above, the seat portion 12, the backrest portion 13, and the seat base portion 14 are provided via the first to third connecting shafts and the first to fourth guide grooves that receive and hold these connecting shafts. Connected to each other and assembled. Thus, the child seat 11 shown in FIG. 1 is configured.

  Next, the reclining structure of the child seat 11 according to the present embodiment will be described with reference to FIGS. FIG. 13 is a side view of the child seat 11 viewed from the right side when the backrest 13 is in the first rearward tilt position. FIG. 14 is a side view of the child seat 11 viewed from the right side when the backrest 13 is tilted from the first rearward tilt position to the second rearward tilt position. FIG. 15 is a side view of the child seat 11 viewed from the right side when the backrest 13 is tilted to the maximum rearward tilt position.

  Referring to FIGS. 13 to 15, when the backrest portion 13 is in the first rearward tilt position, the first connecting shaft 15 includes the rear end 33 of the left first guide groove 17a and the right first guide groove 17b, 41 is disposed so as to abut on the surface 41. That is, the lower end portion 24 of the backrest portion 13 and the connecting shaft insertion portions 54 and 55 corresponding to the rear end portion of the seat portion 12 are also arranged at the positions of the rear ends 33 and 41 in the seat base portion 14. At the same time, the left second connecting shaft 16a provided on the seat base portion 14 abuts on the lower end 27 of the left second guide groove 18a provided on the backrest portion 13, and the right second connecting shaft 16b is provided on the right side. It arrange | positions so that the lower end 29 of the 2nd guide groove 18b may contact | abut.

In this state, the reclining angle of the backrest 13 is defined by the position of the connecting shaft 16 provided in the seat base 14 and the positions of the rear ends 33 and 41 of the first guide groove 17. That is, as shown in FIG. 13, the reclining angle of the backrest 13 at the first rearward tilt position is defined by the line 62 defined by the connecting shaft 16 and the connecting shaft 15 contacting the rear ends 33 and 41, and the vertical direction. It is expressed approximately as an angle θ ₁ formed.

  Further, the left third connecting shaft 19a provided in the seat portion 12 contacts the rear end 44 of the left third guide groove 20a provided in the seat base portion 14, and the right third connecting shaft 19b is provided on the right side. It arrange | positions so that the rear end 38 of the 3rd guide groove 20b may contact | abut. That is, the angle of the seat portion 12 with respect to the backrest portion 13 is defined by the positions of the rear ends 38 and 44 of the third guide groove 20 with respect to the rear ends 33 and 41 of the first guide groove 17.

  When the backrest 13 is tilted backward from the first rearward tilt position shown in FIG. 13 to the second rearward tilt position shown in FIG. 14, the first connecting shaft 15 has the rear ends 33 and 41 of the first guide groove 17. To the front lower side along the extending direction of the first guide groove 17 and move to the positions of the front ends 34 and 42 of the first guide groove 17. At the same time, the left second connecting shaft 16a provided in the seat base portion 14 is guided by the left second guide groove 18a from the lower end 27 of the left second guide groove 18a provided in the backrest portion 13 to The right second connecting shaft 16b relatively moves to the position, and relatively moves from the lower end 29 to the upper end 28 of the right second guide groove 18b.

In this state, the reclining angle of the backrest 13 is defined by the position of the connecting shaft 16 provided in the seat base 14 and the positions of the front ends 34 and 42 of the first guide groove 17. That is, as shown in FIG. 14, the reclining angle of the backrest 13 at the second rearward tilt position is formed by the line 63 defined by the connecting shaft 16 and the connecting shaft 15 positioned at the front ends 34 and 42 and the vertical direction. It is approximately expressed as an angle theta _2.

  Further, the left third connecting shaft 19 a provided in the seat portion 12 is guided by the left third guide groove 20 a from the rear end 44 of the left third guide groove 20 a provided in the seat base portion 14, and is connected to the front end 45. The right third connecting shaft 19b moves to the position of the front end 39 from the rear end 38 of the right third guide groove 20b. Therefore, the seat portion 12 follows the movement of the backrest portion 13 tilting from the first rearward tilt position to the second rearward tilt position while moving to the front lower side, and moves forward according to the extending direction of the third guide groove 20. And move. That is, the angle of the seat portion 12 with respect to the backrest portion 13 is defined by the positions of the front ends 39 and 45 of the third guide groove 20 with respect to the front ends 34 and 42 of the first guide groove 17.

Thus, in the child seat 11 according to the present embodiment, when the backrest 13 tilts from the first rearward tilt position to the second rearward tilt position, the backrest 13 moves to the front lower side, and FIG. Is tilted from the reclining angle θ ₁ shown in FIG. 14 to the reclining angle θ ₂ shown in FIG. According to this configuration, as shown in FIG. 14, the backrest 13 is reclined without greatly deviating from the position of the backrest 13 at the first rearward tilt position (two-dot chain line A in FIG. 14) to the back side. It becomes possible. Thereby, the arrangement | positioning of the backrest part 13 in consideration of the safety | security of the infant to sit down can be implement | achieved in the usage form of both forward and backward. This will be described below.

  A child seat is generally placed on a seat seat of an automobile and fixed by a seat belt. Here, the seat seat of the automobile has an inclination that rises toward the front of the vehicle body from the viewpoint of the user's sitting comfort and the like. Therefore, when changing from the forward use form to the rear use form, the user inevitably needs to adjust the reclining angle suitable for the backward use form by tilting the backrest portion rearward. In this case, in the conventional child seat, as described above, since the backrest portion is rotated around the fixed connecting shaft, when the backrest portion is tilted backward to the back side, that is, the vehicle body front side, The head of the infant sitting inevitably moves to the front side of the vehicle body.

  On the other hand, in the child seat 11 according to the present embodiment, as described above, the backrest portion 13 is moved forward and downward by the two connecting shafts 15 and 16 that move relatively inside the guide groove. In addition, it can be tilted backward. Therefore, as shown in FIG. 14, even when the backrest portion 13 is reclined from the first rearward tilt position to the second rearward tilt position, the backrest portion 13 is greatly displaced toward the back side when viewed from the seat base portion 14. There is no. Therefore, even when the child seat 11 is changed to the backward use form and the backrest portion needs to be tilted backward, the backrest portion 13 is tilted backward while the position of the head of the baby sitting is substantially fixed. It is possible. Thus, even when the backrest is tilted backward in the rearward usage pattern, the child's seat 11 according to the present embodiment can be arranged at a position closer to the rear side of the vehicle body, even if the infant's head is closer to the rear of the vehicle body. In both forward and backward usage modes, a child seat structure with excellent safety in a collision accident can be realized.

Moreover, in the child seat 11 according to the present embodiment, as described above, the reclining angles θ ₁ and θ ₂ of the backrest portion 13 are set so that the first guide groove 17, the second guide groove 18, and the second connecting shaft 16 are arranged. The angle of the seat portion 12 with respect to the backrest portion 13 is defined by the arrangement of the third guide groove 20 with respect to the first guide groove 17. Accordingly, by appropriately designing the positions and extending directions of the end portions of these guide grooves and the position of the second connecting shaft 16, the first rearward tilt angle suitable for the forward use form and the second suitable for the rear use form. The rearward tilt angle and the angle of the seat portion 12 with respect to the backrest portion 13 at each rearward tilt angle can be appropriately created so as to be optimal from the viewpoints of safety and comfort of the infant to be seated.

  In the present embodiment, when the backrest 13 is in the first rearward tilt position, the first connecting shaft 15 is located at the rear end 41 of the left first guide groove 17a and the rear end 33 of the right first guide groove 17b. Abut. The left second connecting shaft 16a is in contact with the lower end 27 of the left second guide groove 18a, and the right second connecting shaft 16b is in contact with the lower end 29 of the right second guide groove 18b. Further, when the backrest 13 is in the second rearward tilt position, the first connecting shaft 15 is disposed at the front end 42 of the left first guide groove 17a and the front end 34 of the right first guide groove 17b. The left second connecting shaft 16a is in contact with the upper end 26 of the left second guide groove 18a, and the right second connecting shaft 16b is in contact with the upper end 28 of the right second guide groove 18b.

  According to this configuration, the first connecting shaft 15 is locked to the end portion of the first guide groove 17 in both cases where the backrest portion 13 is at the first rearward tilt position and the second rearward tilt position. In addition, the second connecting shaft 16 is locked to the end portion of the second guide groove 18. Thereby, when the backrest part 13 exists in the position of the 1st back tilt position or the 2nd back tilt position, since the contact area of a connection axis | shaft and a guide groove wall surface can be enlarged, the backrest part 13 is seat base. The strength locked to the portion 14 can be improved. Therefore, the impact durability of the child seat 11 at the time of a collision accident can be improved.

  When the backrest 13 is tilted backward from the second backward tilt position shown in FIG. 14 to the maximum rearward tilt position shown in FIG. 15, the first connecting shaft 15 is moved from the front ends 34 and 42 of the first guide groove 17. It is guided upward along the extending direction of the fourth guide groove 35 and moves to the positions of the upper ends 36 and 43 of the fourth guide groove 35. That is, the lower end 24 of the backrest 13 is lifted up to the positions of the upper ends 36 and 43. At the same time, the left second connecting shaft 16a provided on the seat base portion 14 relatively moves from the upper end 26 to the position of the lower end 27 of the left second guide groove 18a provided on the backrest portion 13, and on the right side. The second connecting shaft 16b relatively moves from the upper end 28 to the position of the lower end 29 of the right second guide groove 18b.

In this state, the reclining angle of the backrest portion 13 is defined by the position of the connecting shaft 16 provided in the seat base portion 14 and the positions of the upper ends 36 and 43 of the fourth guide groove 35. That is, as shown in FIG. 15, the reclining angle of the backrest portion 13 at the maximum rearward tilt position is an angle formed by the line 64 defined by the connecting shaft 15 that contacts the connecting shaft 16 and the upper ends 36 and 43, and the vertical direction. It is approximately expressed as theta _3.

  In the seat portion 12, the connecting shaft insertion portions 54 and 55 corresponding to the rear end portions thereof are lifted upward following the movement of the first connecting shaft 15. At this time, the position of the first connecting shaft 15 is changed from the rear ends 58 and 60 of the through grooves 56 and 57 to the front ends 59 and 61 inside the through grooves 56 and 57 provided in the connecting shaft insertion portions 54 and 55. Move relative to. At the same time, the left third connecting shaft 19a provided in the seat portion 12 moves upward from the front end 45 of the left third guide groove 20a provided in the seat base portion 14, enters the notch portion 46, and The right third connecting shaft 19 b moves upward from the front end 39 of the right third guide groove 20 b and enters the notch 37. The through grooves 56 and 57 and the notches 37 and 46 function as “play” for allowing the movement of the seat portion 12, so that the seat portion 12 is smoothly moved. In this way, the seat portion 12 moves following the movement of the backrest portion 13, and is disposed so as to be substantially horizontal when the backrest portion 13 is tilted to the maximum rearward tilt position. In this state, the angle of the seat portion 12 with respect to the backrest portion 13 is defined by the positions of the notches 37 and 46 with respect to the upper ends 36 and 43 of the fourth guide groove 35.

  As described above, the child seat 11 according to this embodiment moves the first connecting shaft 15 from the rear ends 33 and 41 of the first guide groove 17 to the front ends 34 and 42 and then the front ends 34 and 42 of the first guide groove 17. The reclining portion 13 can be gradually reclined from the first rearward tilt position to the second rearward tilt position and then to the maximum rearward tilt position by a series of movements that move from the first to the upper end 36, 43 of the fourth guide groove 35. it can. Therefore, the user can change the form of the child seat 11 from the forward use form to the rear use form and the bed form by the easy operation as described above. Thereby, the child seat 11 according to the present embodiment is consistent from the time of a newborn or infant who is often used with the child seat in a bed state to the time of an infant or school child who often uses the child seat in a chair state. Can be used.

In the child seat 11 according to the present embodiment, the reclining angle θ ₃ when the backrest 13 is in the maximum rearward tilt position is the arrangement of the fourth guide groove 35, the second guide groove 18, and the second connecting shaft 16. The angle of the seat portion 12 with respect to the backrest portion 13 is defined by the arrangement of the third guide groove 20 with respect to the upper ends 36 and 43 of the fourth guide groove 35. Accordingly, by appropriately designing the positions and extending directions of the end portions of these guide grooves and the position of the second connecting shaft 16, the maximum rearward tilt angle suitable for the bed state and the backrest portion 13 suitable for the bed state. The angle of the seat 12 with respect to can be appropriately set up so as to be optimal from the viewpoint of safety and comfort of the infant to be seated. That is, the child seat 11 according to the present embodiment can be used consistently from the period of newborns and infants to the period of infants and schoolchildren, and in any use form of forward, backward, and bed state, It is possible to improve the safety of the infant and the comfort of the infant at the time of the collision accident.

  Further, in the child seat 11 according to the present embodiment, as described above, the backrest 13 is reclining stepwise from the first rearward tilt position to the second rearward tilt position and then to the maximum rearward tilt position. One connecting shaft 15 itself moves forward and downward, and then moves forward and upward. And the backrest part 13 and the seat part 12 will also move in steps so that it may follow. That is, the child seat 11 according to the present embodiment is configured such that when the chair state is changed to the bed state, the positions of the backrest portion 13 and the seat portion 12 move further forward. Thereby, since the gravity center of the backrest part 13 and the seat part 12 in a bed state can be brought close to the center position of the seat base part 14, it becomes possible to make the gravity center of the child seat 11 more stable.

  Further, in the child seat 11 according to the present embodiment, when the backrest portion 13 tilts from the second rearward tilt position to the maximum rearward tilt position, the backrest portion 13 uses the first connecting shaft 15 as a reference point for rotation. Instead of tilting, the second connecting shaft 16 provided at a relatively high position of the seat base portion 14 is tilted backward with the reference point for rotation. That is, when the child seat 11 according to the present embodiment is in the bed state, the backrest 13 and the seat 12 are locked on the basis of the position of the second connecting shaft 16, so the backrest 13 and It becomes possible to arrange the seat 12 at a relatively high position. As a result, when the child seat 11 is in a bed state in the automobile, the backrest 13 and the seat 12 can be disposed above the handle provided on the inner walls of the left and right doors of the automobile. And it can prevent that the seat part 12 and the handle part of a door interfere.

  Further, in the child seat 11 according to the present embodiment, the first guide groove 17, the second guide groove 18, and the fourth guide groove 35 are all provided so as to extend in a curved shape. According to this structure, the 1st connection shaft 15 and the 2nd connection shaft 16 are the inside of the 1st guide groove 17, the 2nd guide groove 18, and the 4th guide groove 35 along the extension direction of each guide groove. It will move smoothly in a curved shape. Therefore, the backrest 13 can be tilted more smoothly from the first rearward tilt position to the second rearward tilt position and then to the maximum rearward tilt position.

  The child seat 11 further includes a lock mechanism for locking the backrest 13 to the seat base 14 when the backrest 13 is in the first rearward tilt position, the second rearward tilt position, and the maximum rearward tilt position. You may have. For example, in this locking mechanism, in the first lock through holes provided in the left and right side wall portions 22 and 23 of the backrest portion 13 and the left and right armrest portions 29 and 30 of the seat base portion 14, the backrest portion 13 is in the first rearward tilt position, The second lock through-holes provided at three locations so as to communicate with the first lock through-hole when in the second rearward tilt position and the maximum rearward tilt position, and the backrest portion 13 are the first rear You may be comprised from the lock pin penetrated so that it may penetrate the said 1st lock through-hole and said 2nd lock through-hole when it exists in a tilt position, a 2nd back tilt position, and a maximum back tilt position. According to this configuration, the backrest 13 can be locked to the first rearward tilt position, the second rearward tilt position, and the maximum rearward tilt position by the lock pin, so that the impact durability of the child seat 11 at the time of a collision accident can be increased. Further improvement can be achieved.

  In the above embodiment, the case where the first connecting shaft is attached to the lower end portion of the backrest portion and the first guide groove is provided in the seat base portion is described. The shaft or the first guide groove may be provided in either the backrest portion or the seat base portion. In the above-described embodiment, the case where the second connecting shaft is provided in the seat base portion and the second guide groove is provided in the backrest portion is described. The two guide grooves may be provided in either the backrest portion or the seat base portion. In the above embodiment, the case where the third connecting shaft is provided in the seat portion and the third guide groove is provided in the seat base portion is described. The three guide grooves may be provided in either the seat portion or the seat base portion.

  In the above embodiment, when the backrest is at the first rearward tilt position, the second rearward tilt position, and the maximum rearward tilt position, any of the first to third connecting shafts is connected to the end of the guide groove. Although the case where it is arranged so as to contact is described, the present invention is not limited to this, and even when the backrest is in the first rearward tilt position, the second rearward tilt position, and the maximum rearward tilt position, the connecting shaft is not The structure which does not contact | abut to an edge part may be sufficient.

  In the above embodiment, the case where the first guide groove is provided to extend forward and downward from the rear end to the front end is described. However, the present invention is not limited thereto, and the first guide groove extends from the rear end to the front side. It only has to extend towards. That is, in order to obtain the above-described effect of the present invention, it is only necessary that the first, second guide grooves, and the second connecting shaft are provided so as to tilt the backrest portion while moving the backrest portion forward.

  In the above embodiment, the seat portion is connected to the backrest portion via the first connection shaft, and is connected to the seat base portion via the third connection shaft so as to follow the backrest portion. Although the configuration in which the seat portion also moves stepwise has been described, the seat portion may be separated from the backrest portion and attached to the seat base portion. Even if only the backrest portion is tilted from the first rearward tilt position to the second rearward tilt position as described above and the seat portion is fixed to the other member, the above-described effects of the present invention can be obtained. is there.

  In the above embodiment, the fourth guide groove is provided in the seat base and the child seat can be brought into the bed state. However, the present invention is not limited to this, and the fourth guide groove is not provided. A configuration, that is, a configuration in which the child seat is used only as a forward or backward chair state may be used.

  In the above embodiment, the case where the seat structure according to the present invention is applied to a child seat has been described. However, the present invention is not limited to this, and it is advantageous for all child-care equipment having a reclining seat structure such as a baby carriage or a baby chair. It is possible to apply.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

  The present invention provides a seat structure for a childcare device that can improve the safety and comfort of a sitting infant, and is advantageously used for all childcare devices having a seat structure.

  DESCRIPTION OF SYMBOLS 11 Child seat, 12 Seat part, 13 Backrest part, 14 Seat base part, 15 1st connection axis | shaft, 16 2nd connection axis | shaft, 16a Left side 2nd connection axis | shaft, 16b Right side 2nd connection axis | shaft, 17 1st guide groove, 17a Left side First guide groove, 17b Right first guide groove, 18 Second guide groove, 18a Left second guide groove, 18b Right second guide groove, 19 Third connection shaft, 19a Left third connection shaft, 19b Right third connection Axis, 20 Third guide groove, 20a Left third guide groove, 20b Right third guide groove, 21 Back wall part, 22, 49 Left side wall part, 23, 50 Right side wall part, 24 Lower end part, 25 Through hole, 26 28, 36, 43 Upper end, 27, 29 Lower end, 28, 48 Bottom wall part, 29 Left arm rest part, 30 Right arm rest part, 31 Front wall part, 32 Rear wall part, 33, 38, 41, 44, 58, 60 Rear end, 34, 39, 42, 45, 59, 61 Front end, 35 Fourth guide groove, 35a Left fourth guide groove, 35b Right fourth guide groove, 37, 46 Notch, 40, 47 inner wall surface, 51 lower surface, 52, 53 connecting shaft attaching portion, 54, 55 connecting shaft inserting portion, 56, 57 through groove, 62, 63, 64 lines.

Claims (8)

A seat structure of a child seat that is attached to a seat of an automobile and is switchable between both a forward-use usage mode and a rear-use usage mode,
A seat base, a backrest connected to the seat base via a first connecting shaft and a second connecting shaft, and a backrest connected to the seat base via a first connecting shaft. And a seat portion connected to the seat base portion via a third connecting shaft ,
Wherein the first connecting shaft is attached to the front Symbol backrest, the seat base portion extends in the longitudinal direction and located below the front end the rear end of the time of the forward mode of use, the A first guide groove for receiving the first connecting shaft and guiding the movement of the first connecting shaft is formed;
The second connecting shaft is located above the first connecting shaft, and is attached to either the seat base portion or the backrest portion, and the other member extends in the vertical direction, A second guide groove is formed for receiving the two connecting shafts and guiding the movement of the second connecting shaft ;
The third connecting shaft is located in front of the first connecting shaft and is attached to either the seat portion or the seat base portion, and the other member extends in the front-rear direction. A third guide groove is formed for receiving the three connecting shafts and guiding the movement of the third connecting shaft;
It said back portion, the first back tilting position is reclining angle when mounted on the seat of the motor vehicle in the forward mode of use, is the reclining angle when mounted on the seat of the motor vehicle in the backward mode of use when it is inclined rearwards to the second backward tilting position, the first connecting shaft, said first guide moves from the rear end of the groove to the front end, the front Stories second connecting shaft, one of said second guide groove Moving from one end to the other end, the third connecting shaft is guided to move from one end to the other end of the third guide groove ,
The angle of the seat portion with respect to the backrest portion in the forward use form is defined by the position of one end of the third guide groove with respect to the rear end of the first guide groove, and the seat with respect to the backrest portion in the rear use form. The child seat structure is defined by the position of the other end of the third guide groove with respect to the front end of the first guide groove . The first guide groove extends in a curved shape so as to protrude upward,
The child seat structure according to claim 1, wherein the second guide groove extends in a curved shape so as to protrude rearward. Before Stories second connecting shaft is attached to said seat base portion, said second guide groove, the are formed in the backrest, the seat structure of the child seat according to claim 1 or 2. The first guide groove extends in a curved shape so as to protrude upward from the rear end to the front end located on the front lower side of the rear end,
The second guide groove extends in a curved shape so as to protrude rearward from the upper end to the lower end,
The second connecting shaft is guided so as to move from a lower end to an upper end of the second guide groove when the backrest portion tilts from the first rearward tilt position to the second rearward tilt position. 4. The child seat structure according to 3. The child seat structure according to any one of claims 1 to 4, wherein the third connecting shaft is attached to the seat portion, and the third guide groove is formed in the seat base portion. The seat base portion is further provided with a fourth guide groove that extends upward and continues to the front end of the first guide groove and guides the upward movement of the first connecting shaft,
The child seat structure according to claim 4, wherein when the first connecting shaft moves to an upper end of the fourth guide groove, the backrest portion tilts to a maximum rearward tilt position, and the child seat is in a bed state. When the first connecting shaft moves from the lower end to the upper end of the fourth guide groove,
The child seat structure according to claim 6 , wherein the second connecting shaft is guided so as to move from an upper end to a lower end of the second guide groove. The seat structure for a child seat according to claim 6 or 7 , wherein the fourth guide groove extends in a curved shape so as to project forward from the lower end to the upper end.

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