JP2012020687A - Seat structure of child-care apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat structure of a child-care apparatus capable of arranging a pad part in an optimal position corresponding to the growth of a baby, only by installing a shoulder pad assembly in a seat body.SOLUTION: This seat structure of the child-care apparatus is constituted so that the passage length Kn reaching as far as the other front opening by passing through a back face of a seat back part 13 from one front opening of a pair of shoulder belt holes 17 positioned below, and the passage length Km reaching as far as the other front opening by passing through the back face of the seat back part from one front opening of the pair of shoulder belt holes 17 positioned above its hole satisfy Kn>Km.

Description

  The present invention relates to a seat structure for a childcare device, and more particularly to a seat structure for a childcare device that restrains an infant on a seat by a restraining belt.

  In a childcare device used for seating an infant, an infant is generally restrained to a seat by a restraining belt for safety. A typical example of such a child-care device is a child car seat for automobiles. For example, JP 2008-290587 A (Patent Document 1) is disclosed as a conventional child seat.

  The child seat described in Patent Literature 1 includes a seat body that has a seat portion that supports an infant from below, a backrest portion that supports the back of the infant from the back, and a restraint belt for restraining the infant on the seat body. A shoulder belt hole penetrating in the thickness direction is provided in the backrest portion in a plurality of stages at predetermined intervals in the vertical direction so as to form a pair of left and right. The restraint belt is composed of left and right shoulder belts that are stretched over both shoulders of the infant, and a crotch belt that is coupled to the seat portion at the lower end and is stretched over the crotch portion of the infant. The left and right shoulder belts have their front ends inserted through the left and right shoulder belt holes described above, pulled out forward of the backrest portion, and hung around the shoulders of the infant.

  The child seat described in Patent Document 1 further includes a shoulder pad assembly for preventing the infant's shoulders and the shoulder belt from coming into direct contact with each other. The shoulder pad assembly includes a pair of left and right pad portions and a pad connection string body that connects the two pad portions to each other at a predetermined interval. When attaching the shoulder pad assembly to the child seat, the user inserts the left and right pad parts from the rear side into the shoulder belt holes through which the left and right shoulder belts are inserted, and forwards the back part to the front side. And pull out. Next, the left and right shoulder belts are inserted into through holes formed in the left and right pad portions. And a pad part is arrange | positioned in the infant's shoulder vicinity restrained by the seat main body, and it prevents that the infant's both shoulders and shoulder belt touch directly. In addition, the pad portion is provided with a slip prevention portion having grip properties in a region where the pad portion is in contact with the infant.

  Since the child seat described in Patent Document 1 has the above-described configuration, it has the following characteristics. The pad portion disposed in the vicinity of the infant's shoulder can prevent the infant's shoulders from coming into contact with the shoulder belt, thereby protecting the infant from friction with the shoulder belt. Further, the anti-slip portion is attached to the pad portion as described above. In this way, when the vehicle collides forward, in addition to the action of restraining the infant to the seat body by the restraining belt, the infant is provided via the pad part provided with the anti-slip part and the pad connecting string connecting the pad part. Can be restrained to the backrest. Therefore, it is possible to improve the effect of inhibiting the infant from moving forward. Due to such characteristics, the child seat described in Patent Document 1 is excellent in comfort and safety of a seated infant.

JP 2008-290587 A

  In the child seat described in Patent Document 1, the shoulder pad assembly extends forward from the front opening of the shoulder belt hole, regardless of whether the shoulder pad assembly is inserted into a plurality of shoulder belt holes provided in the backrest portion. The length of the pad connecting string is substantially constant. That is, even if the shoulder pad assembly is inserted into any of the shoulder belt holes, the distance from the front opening of the shoulder belt hole to the left and right pad portions is unchanged.

  Such a configuration is problematic with regard to infant comfort and safety. This will be described below with reference to FIGS. 14 and 15. FIG. 14 is a side cross-sectional view schematically showing a state where a young child A is seated on a conventional child seat 101. FIG. 15 is a side cross-sectional view schematically showing a state where an older infant B is seated on a conventional child seat 101. 14 and 15, it should be understood that the relative size difference between the infant A and the infant B in the drawings is exaggerated for the sake of clarity.

  Referring to FIG. 14 and FIG. 15, when an infant A who is young in age is seated on a conventional child seat 101, the pad portion 102 is disposed from the chest of the infant to the abdomen as shown in FIG. Become. This is because the width of the infant A's body in the front-rear direction is relatively small, so that the length x of the pad connecting string 105 extending forward from the front opening 104 of the shoulder belt hole 103, that is, from the shoulder belt hole 103. This is because the distance x to the pad portion 102 becomes relatively large with respect to the body width. On the other hand, when an older child B is seated on the conventional child seat 101, the pad portion 102 is disposed above the shoulder of the infant B as shown in FIG. Contrary to the case of the small infant A described above, since the large infant B has a large body width, the distance x from the shoulder belt hole 103 to the pad portion 102 is relatively short with respect to the infant's body width. This is because it becomes.

  In the case of the small infant A shown in FIG. 14, since the pad portion 102 is not disposed on the upper shoulder, there is a risk that the comfort of the infant is significantly impaired by direct contact between the shoulder belt and the infant's neck. In general, when the anti-slip portion of the pad portion is arranged so as to extend from the upper shoulder of the infant to the vicinity of the chest, it is possible to most effectively prevent the infant from moving forward in a forward collision accident. Therefore, if the position of the pad portion 102 is shifted downward as shown in FIG. 14, it is not possible to effectively exert a deterrent that suppresses the forward movement of the infant A. On the other hand, in the case of the large infant B shown in FIG. 15, the position of the pad portion 102 is shifted to the upper side of the chest, and the vicinity of the chest of the infant B cannot be suppressed by the pad portion 102. Therefore, even in this case, the deterrent that suppresses the forward movement of the infant B cannot be effectively exhibited.

  Due to these problems, in the conventional child seats, multiple types of pad portions are prepared, and the pad portions are replaced each time the child grows, or a pad that is longer than necessary is attached. Has been taken. However, such means have problems such as complicated replacement work and increased manufacturing costs.

  In addition, the conventional child seat has a mechanism for adjusting the length of the pad connecting string body in order to adjust the position of the pad section, and the left and right pad sections are connected by the pad connecting string body. In some cases, the left and right pad portions are slidably inserted into the left and right shoulder belts stretched over the infant. However, since the former forces the user to adjust the length of the pad connection string body, there is a problem regarding convenience, and a separate member must be added, leading to an increase in manufacturing cost. Moreover, since the pad part is slidable with respect to the shoulder belt, the latter has a problem regarding safety because the pad part does not have an effect of preventing the infant from moving forward in the event of a forward collision.

  In view of the above problems, an object of the present invention is to provide a seat structure for a child-care instrument capable of arranging a pad portion at an optimal position according to the growth of an infant simply by attaching a shoulder pad assembly to the seat body. It is.

The seat structure of the childcare apparatus according to the present invention comprises a seat body having a seat portion for supporting an infant from below and a backrest portion in which a plurality of paired shoulder belt holes on the left and right sides are arranged at predetermined intervals in the vertical direction. The left shoulder belt that is inserted through the left shoulder belt hole and pulled out forward and stretched over the infant's left shoulder, and the right shoulder that is inserted through the right shoulder belt hole and pulled out forward and stretched over the infant's right shoulder A restraint belt that restrains the infant on the seat body, a left pad portion that is disposed in a region where the infant and the left shoulder belt contact each other, and a right that is disposed in a region where the infant and the right shoulder belt contact each other A pad body for connecting the pad part and the left and right pad parts to the backrest part, and is connected to the left and right pad parts through the shoulder belt hole through which the shoulder belt is inserted and pulled out to the front side. Shoulder pad assembly having a string And a body. Here, the seat structure of the child-care instrument, and a path length K _n ranging from one front opening of the pair of shoulder belts hole to the front opening of the street the other the back of the backrest portion located below, positioned above it a pair of path length extending from the front opening to the front opening of the street the other the back of the backrest of one of the shoulder belt hole K _m for is configured to satisfy K _n> K _m.

According to this arrangement, the path length K _n in the shoulder belt holes more provided above is, as shorter, the seat body is configured. As a result, when the shoulder pad assembly is attached to the shoulder belt hole provided above, the length of the pad connecting string inserted through the backrest portion is shifted from the front opening of the shoulder belt hole to the front side. The length of the extending part becomes longer. That is, according to the configuration of the seat body, the relative position of the pad portion with respect to the shoulder belt hole can be adjusted according to the position of the selected shoulder belt hole in the vertical direction. Therefore, the user can select a shoulder belt hole provided at a position that matches the height of the infant, and by inserting the shoulder pad assembly into the shoulder belt hole and attaching the shoulder belt hole, the body of the infant grows as the infant grows. Since the pad portion can be arranged according to the width, the pad portion can always be arranged at an optimal position from the infant's shoulder to the chest regardless of the target age. Thereby, while being able to always bring comfort to an infant, the safety | security at the time of a collision accident can be improved effectively.

Preferably, the backrest portion has a shape in which the thickness is gradually reduced toward the upper, the difference between the path length K _n and the path length K _m is backrest in the pair of shoulder belts hole located below And the thickness of the backrest portion of the pair of shoulder belt holes located above. According to this configuration, by setting the thickness of the backrest part to be gradually reduced according to the height of the backrest part, the pad part can be attached to the infant just by inserting the shoulder pad assembly into the shoulder belt hole and attaching it. It becomes possible to arrange at an optimum position according to the growth of the film. Accordingly, it is not necessary to provide a separate member for adjusting the pad portion position, and the form is suitable for mass production of the product, so that the seat structure having the above-described effect can be realized without increasing the manufacturing cost. be able to.

  Preferably, the pad coupling string body is a string body coupling the left pad portion and the right pad portion, and one end is drawn forward from the front opening of the left shoulder belt hole and coupled to the left pad portion, and the other end. Is pulled forward from the front opening of the right shoulder belt hole and connected to the right pad portion, and its central region is stretched over the back surface of the backrest portion. According to this configuration, the user simply inserts the left and right pad portions into the left and right shoulder belt holes from the rear side, and pulls them out to the front side, so that the pad connecting string is stretched over the back portion of the backrest portion, The backrest part is connected. That is, the work of attaching the shoulder pad assembly to the backrest becomes easier. Moreover, since the structure of a pad connection string can be made simpler, manufacturing cost can be reduced.

Preferably, a rib projecting rearward from the back surface is provided on the back surface of the backrest portion, and the pad connecting string stretched over the back surface of the backrest portion is stretched so as to pass over the rib, The difference between the path length _Kn and the path length _Km is due to the difference between the rib height at the position of the pair of shoulder belt holes positioned above and the height of the rib at the position of the pair of shoulder belt holes positioned below. Brought about. According to this configuration, by designing the height of the rib at the position of each shoulder belt hole pair to be gradually reduced according to the vertical height of the backrest portion of the rib, By simply inserting and attaching the assembly, the pad portion can be arranged at an optimum position according to the growth of the infant. Accordingly, it is not necessary to provide a separate member for adjusting the pad portion position, and the form is suitable for mass production of the product, so that the seat structure having the above-described effect can be realized without increasing the manufacturing cost. be able to.

  Preferably, the rib is a rib that is provided between the plurality of pairs of shoulder belt holes and extends in the vertical direction on the back surface of the backrest portion. Or a rib is a cylindrical rib provided in the back surface of a backrest part so that the circumference | surroundings of a shoulder belt hole might be surrounded. According to this configuration, since the shape is simple, the seat structure having the above-described effect can be realized by the protruding ribs or the cylindrical ribs that are easy to mold.

  Preferably, the child-care instrument is a child seat used in an automobile. According to this configuration, it is possible to provide a child seat that can automatically place the pad portion at an optimum position according to the growth of the infant just by attaching the shoulder pad assembly to the seat body as described above. it can.

According to the present invention, the path length K _n in the shoulder belt holes more provided above is, as shorter, the seat body is configured. As a result, when the shoulder pad assembly is attached to the shoulder belt hole provided above, the length of the pad connecting string inserted through the backrest portion is shifted from the front opening of the shoulder belt hole to the front side. The length of the extending part becomes longer. That is, according to the configuration of the seat body, the relative position of the pad portion with respect to the shoulder belt hole can be adjusted according to the position of the selected shoulder belt hole in the vertical direction. Therefore, the user can select a shoulder belt hole provided at a position that matches the height of the infant, and by inserting the shoulder pad assembly into the shoulder belt hole and attaching the shoulder belt hole, the body of the infant grows as the infant grows. Since the pad portion can be arranged according to the width, the pad portion can always be arranged at an optimal position from the infant's shoulder to the chest regardless of the target age. Thereby, while being able to always bring comfort to an infant, the safety | security at the time of a collision accident can be improved effectively.

It is the external view which looked at the child seat concerning one embodiment of the present invention from the left front. It is the enlarged view which looked at the backrest part of the child seat shown in FIG. 1 from the front. It is the external view which looked at the shoulder pad assembly shown in FIG. 1 from the front. It is the external view which looked at the shoulder pad assembly shown in FIG. 1 from the back surface. FIG. 4 is an external view showing a state where left and right pad portions of the shoulder pad assembly shown in FIG. 3 are opened. The side sectional view of the child seat shown in Drawing 1 is shown. Sectional drawing cut | disconnected by VII-VII in FIG. 6 and seen from upper direction is shown. FIG. 2 is a side sectional view showing a state in which the child seat shown in FIG. 1 is reclined and a young infant is laid down. It is the external view which looked at the child seat which concerns on further another embodiment of this invention from the right rear. Fig. 10 is a side sectional view of the child seat shown in Fig. 9. Sectional drawing cut | disconnected by XI-XI in FIG. 10 was seen from upper direction. The Example of the rib provided in the child seat which concerns on this invention is shown. The Example of the rib provided in the child seat which concerns on this invention is shown. It is side sectional drawing which shows the state which made the young child sit on the conventional child seat. It is side sectional drawing which shows the state which made the young child sit on the conventional child seat.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The concept of the present invention can be applied to all child-care equipment having a seat structure. Examples of such child-care equipment include a child seat, a baby carriage, a baby rack, and a baby chair. In the following description, a child seat will be described as an example.

  First, the outline 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 external view of a child seat 11 according to an embodiment of the present invention as viewed from the left front. FIG. 2 is an enlarged view of the backrest 13 of the child seat 11 shown in FIG. 1 as viewed from the front. For easy understanding, the left and right shoulder belts 18 and 19 are indicated by two-dot chain lines in FIG. Moreover, the left-right direction in the following description is based on the direction seen from the infant. That is, in FIG. 2, the left direction of the drawing is the right direction in the following description.

  With reference to FIG. 1 and FIG. 2, the child seat 11 which concerns on one Embodiment of this invention is attached to the seat part 12 which can support the seat part 12 which supports the infant (not shown) seated from the lower part, and reclining, A seat main body 14 including a backrest portion 13 that supports a seated infant from behind, a restraint belt 15 for restraining the seated infant on the seat body 14, and a shoulder pad assembly 16 described later. A shoulder belt hole 17, which is a pair of left and right through holes, is disposed in the backrest portion 13 at a predetermined interval in the vertical direction. The shoulder belt hole 17 includes a left shoulder belt hole 17 a provided on the left side of the backrest portion 13 and a right shoulder belt hole 17 b provided on the right side of the backrest portion 13. The restraint belt 15 includes a left shoulder belt 18 that is stretched over the infant's left shoulder when used, a right shoulder belt 19 that is stretched over the infant's right shoulder when used, and a crotch belt 20 that is stretched over the infant's crotch. ing. The left shoulder belt 18 is inserted into the left shoulder belt hole 17a from the rear side of the backrest portion 13 and pulled out to the front side. Similarly, the right shoulder belt 19 is inserted into the right shoulder belt hole 17b from the rear side and pulled out to the front side. And the front-end | tip of the left shoulder belt 18 and the right shoulder belt 19 is connected with the crotch belt 20 through the buckle 21 provided in the upper end of the crotch belt 20. FIG.

As described above, a plurality of pairs of left and right shoulder belt holes 17 are arranged in the backrest portion 13 in the vertical direction. Here, the pair of left and right shoulder belt holes 17 positioned at the lowest position in the vertical direction are the first shoulder belt holes 171, and the first shoulder belt holes 171 are the first left shoulder belt hole 171 a and the first right shoulder belt. It is comprised from the hole 171b. In other words, in the present embodiment, the shoulder belt 17 extends over five stages at a predetermined interval from the first shoulder belt hole 171 provided at the lowermost position to the fifth shoulder belt hole 175 provided at the uppermost position. A left shoulder belt hole 17a and a right shoulder belt hole 17b are provided in each step, and a pair of left shoulder belt hole 17a and right shoulder belt hole 17b. The left shoulder belt hole 17a is vertically arranged from the first left shoulder belt hole 171a provided at the lowermost position to the fifth left shoulder belt hole 175a provided at the uppermost position, and the right shoulder belt hole 17b is arranged at the lowermost position. The first right shoulder belt hole 171b is arranged vertically to the fifth right shoulder belt hole 175b provided at the uppermost position. In the present embodiment, the shoulder belt holes 17 are provided such that the distance d ₀ (shown in FIG. 2) between the left shoulder belt hole 17a and the right shoulder belt hole 17b is the same.

  The user selects a pair of shoulder belt holes 17 provided at a position most suitable for the height of the seated infant from among the shoulder belt holes 17 arranged in five stages, and the left and right shoulder belts are selected. 18 and 19 are inserted and used. For example, in the embodiment shown in FIGS. 1 and 2, the user selects the fourth shoulder belt hole 174, passes the left shoulder belt 18 through the fourth left shoulder belt hole 174a, and places the right shoulder belt 19 in the fourth right shoulder. The belt hole 174b is inserted.

  Next, a shoulder pad assembly 16 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 3 is an external view of the shoulder pad assembly 16 shown in FIG. 1 as viewed from the front. 4 is an external view of the shoulder pad assembly 16 shown in FIG. FIG. 5 is an external view showing a state where the left and right pad portions 161 and 162 of the shoulder pad assembly 16 shown in FIG. 3 are opened.

  The child seat 11 according to the present invention includes a shoulder pad assembly 16 for preventing direct contact between the infant and the left and right shoulder belts 18 and 19 stretched around the infant's shoulder in use. The shoulder pad assembly 16 is inserted into a shoulder belt hole through which the left and right shoulder belts 18 and 19 are inserted, that is, in the present embodiment, as shown in FIG.

  The shoulder pad assembly 16 includes a left pad portion 161 disposed in a region where the infant and the left shoulder belt 18 abut when in use, and a right pad portion 162 disposed in a region where the infant and the right shoulder belt 19 abut during use. And a pad connection string body 163 that connects the left pad portion 161 and the right pad portion 162. On the back side of the left and right pad portions 161 and 162, an anti-slip portion 164 made of a material with high grip properties is provided. A material having a high grip property is a material having a high coefficient of friction against clothing, human skin, and the like, such as rubber materials and urethane materials.

  As shown in FIG. 5, the left and right pad portions 161 and 162 are formed by folding a substantially elliptical cloth body in two at a folding line 167 extending along the longitudinal direction. Hook fasteners 165 and 166 are provided at both left and right ends of the front surface of the elliptical cloth body so as to extend in the longitudinal direction. When the substantially elliptical cloth body is folded in two along the fold line 167 and the hook and loop fasteners 165 and 166 are connected, the left and right pad portions 161 and 162 are formed in a folded shape as shown in FIGS.

In this embodiment, the pad connection string body 163 is a single string body having a predetermined length for connecting the left pad portion 161 and the right pad portion 162, and one end is sewn to the left pad portion 161. The other end is sewn to the right pad portion 162. The pad connecting string 163 is made of a material having a high tensile strength. Here, the total length of the pad connecting cord 163 extending from the upper end of the left pad 161 to the upper end of the right pad portion 162 is a predetermined length L ₀ as shown in FIG.

  When the shoulder pad assembly 16 is attached to the backrest 13 and the child seat 11 is in the state shown in FIG. 1, the user first inserts the left pad 161 into the fourth left shoulder belt hole through which the left shoulder belt 18 is inserted. 174a is inserted from the back side of the backrest part 13 and pulled out to the front side. Similarly, the right pad portion 162 is inserted from the rear side of the backrest portion 13 into the fourth right shoulder belt hole 174b through which the right shoulder belt 19 is inserted, and pulled out to the front side. Then, the pad connection string 163 that connects the left pad portion 161 and the right pad portion 162 is stretched over the back surface of the backrest portion 13. As described above, by configuring the shoulder pad assembly 16 with the left and right pad portions 161 and 162 and the pad connecting string 163 that connects them, it is easier to attach the shoulder pad assembly 16 to the backrest portion 13. can do. That is, when attaching the shoulder pad assembly 16, the user only has to insert the left and right pad portions 161 and 162 through the left and right shoulder belt holes 17a and 17b from the rear side and pull out to the front side. By this operation, the pad connecting string 163 is stretched over the back surface of the backrest portion 13, so that the left and right pad portions 161 and 162 and the backrest portion 13 can be connected. Moreover, since the structure of the pad connection string 163 can be made simpler, the manufacturing cost can be reduced.

  After the shoulder pad assembly 16 is attached to the backrest part 13, the left and right pad parts 161, 162 which are folded in half are opened, the left and right shoulder belts 18, 19 are wrapped inside and folded again, and the hook and loop fastener 165, Connect and close 166. Thus, the left and right pad portions 161 and 162 are disposed between the infant and the left and right shoulder belts 18 and 19 to prevent the infant and the left and right shoulder belts 18 and 19 from directly touching each other. Here, when the left and right pad portions 161 and 162 are arranged so as to enter between the infant and the left and right shoulder belts 18 and 19, the non-slip portions 164 provided on the back surfaces of the left and right pad portions 161 and 162 are Will abut. As a result, the right and left pad portions 161 and 162 that come into contact with the infant have an effect of gripping the infant, so the left and right pad portions 161 and 162 and the pad connecting string 163 stretched over the backrest portion 13 are used. Apart from the left and right shoulder belts 18, 19, the infant can be restrained by the backrest 13.

  Next, the structure of the seat body 14 of the child seat 11 according to the present embodiment will be described in detail with reference to FIGS. 6 and 7. FIG. 6 is a side sectional view showing a state where the infant C is seated on the child seat 11 shown in FIG. FIG. 7 shows a cross-sectional view taken along the line VII-VII in FIG.

With reference to FIG. 6 and FIG. 7, the seat body 14 of the child seat 11 according to the present embodiment has a backrest portion 13 configured so that the thickness gradually decreases as it goes upward. That is, the thickness of the backrest 13 at a position where the first shoulder belt hole 171 is provided as t _1, sequentially the thickness of the position of the second shoulder belt holes 172 t _2, the position of the third shoulder belt hole 173 or less When the thickness is t ₃ , the thickness at the position of the fourth shoulder belt hole 174 is t ₄ , and the thickness at the position of the fifth shoulder belt hole 175 is t ₅ ,
t ₁ > t ₂ > t ₃ > t ₄ > t ₅ (1)
The backrest 13 is configured to satisfy the above.

Here, as the back of the backrest 13 from the front opening 22 of the fourth left shoulder belt hole 174a, the path length K ₄ leading to the front opening 23 of the fourth right shoulder belt hole 174b is apparent from FIGS. 6 and 7 like,
K ₄ = d ₀ + 2t ₄ (2)
It is. Note that d ₀ (shown in FIGS. 2 and 7) is the distance between the left shoulder belt hole 17a and the right shoulder belt hole 17b as described above.

And among the pad connection string 163 stretched over the backrest part 13, it passes from the front opening 22 of the fourth left shoulder belt hole 174a through the back surface of the backrest part 13 to the front opening 23 of the fourth right shoulder belt hole 174b. portions of the cords Upholstery pass length L ₄ is the length reaching the approximately,
L ₄ ≈K ₄ = d ₀ + 2t ₄ (3)
It becomes.

Here, the length of the portion extending from the front opening 22 of the fourth left shoulder belt hole 174a to the front side to the upper end of the left pad portion 161 in the pad connecting string 163 stretched over the backrest portion 13 is set to Let x ₄ (shown in FIG. 6). The shoulder pad assembly 16 is attached to the backrest portion 13 so that the arrangement of the left pad portion 161 and the right pad portion 162 is substantially symmetric, so that the shoulder pad assembly 16 moves forward from the front opening 23 of the fourth right shoulder belt hole 174b. the length of the portion extending to the upper end of the right pad portion 162 extends similarly becomes x _4.

Then, the total length L ₀ (shown in FIG. 3) of the pad connecting string 163 from the upper end of the left pad portion 161 to the upper end of the right pad portion 162 is
L ₀ = L ₄ + 2x ₄ ≒ d ₀ + 2t ₄ + 2x ₄ (4)
Represented as: From the formula (4), the length x ₄ of the pad connecting string 163 extending forward from the fourth shoulder belt hole 174 is:
x ₄ ≈ (L ₀ −d ₀ −2t ₄ ) / 2 (5)
It becomes.

That is, when the equations (2) to (5) are generalized, the backrest portion 13 extends from the front opening of the nth left shoulder belt hole in the nth shoulder belt hole provided at the n-th position from the bottom of the backrest portion 13. the path length K _n extending to the front opening of the n right shoulder belt holes through the back of the thickness of the backrest 13 and t _n at the position of the n shoulder belt holes,
K _n = d ₀ + 2t _n (6)
Represented as:

In this case, of the pad connection string 163 stretched over the backrest portion 13, the portion extending from the front opening of the nth left shoulder belt hole through the back surface of the backrest portion 13 to the front opening of the nth right shoulder belt hole. string body clad pass length L _n is the length,
L _n ≈K _n = d ₀ + 2t _n (7)
It becomes. Therefore, the length _xn of the pad connecting string 163 extending forward from the nth shoulder belt hole is:
x _n ≒ (L ₀ -d ₀ -2t _n ) / 2 (8)
It becomes. From equation (8), the thickness t _n of the backrest 13 at the position of the nth shoulder belt hole is:
t _n ≒ (L ₀ -d ₀ -2x _n ) / 2 (9)
It is represented by

Here, in this embodiment, since the total length L ₀ of the pad connecting string body 163 and the distance d ₀ between the left shoulder belt hole 17a and the right shoulder belt hole 17b are constant, from the equation (8), length x _n of the pad connecting cord 163 extending frontward from the n shoulder belt holes, so that due to the thickness t _n of the backrest 13 in the position of the n shoulder belt hole.

Further, as shown in the above equation (1), the thickness t _{n at} the position of the n-th shoulder belt hole and the thickness t _{n + 1 at} the position of the (n + 1) -th shoulder belt hole adjacent to the n-th shoulder belt hole Satisfies t _n > t _{n + 1} . Therefore, the path length K _n at the n-th shoulder belt hole and the path length K _{n + 1 at} the (n + 1) -th shoulder belt hole adjacent above the n-th shoulder belt hole are _expressed by K _n > K _{n + 1} from Equation (6). A relationship that satisfies Further, according to the equation (7), when the shoulder pad assembly 16 is inserted into the n-th shoulder belt hole, the string body stretch length L _n and the shoulder pad assembly 16 are inserted into the (n + 1) -th shoulder belt hole. been the cord body clad pass length _{L n + 1} in the _case, it would meet _{L n>} L n _{+ 1.}

That is, the seat body 14 according to this embodiment is more since the path length K _n in the shoulder belt holes 17 provided above is configured to be shorter, provided more upward shoulder pad assembly 16 When attached to the shoulder belt hole 17, the stretched length L _{n of the} pad connecting string body 163 passing through the back surface of the backrest portion 13 becomes shorter. That is, the length _xn of the pad connection string body 163 extending forward from the shoulder belt hole 17 becomes longer.

  As described above, the pad connecting string 163 has mainly two functions. One is to prevent the child's shoulders or neck from coming into contact with the shoulder belts 18 and 19 to cause scratches. The other is that the car collides forward by restraining the infant to the backrest part 13 via the pad connecting string body 163 and the left and right pad parts 161 and 162 provided with the anti-slip part 164 for gripping the infant. In some cases, the effect of inhibiting the infant's forward movement is to be improved. This effect is most effectively exhibited when the anti-slip portion 164 provided on the back of the left and right pad portions 161 and 162 is arranged so as to abut from the upper part of the shoulder of the seated infant to the vicinity of the chest. Is done.

Here, as described above, the infant's body width increases with the growth of the infant. Therefore, in order to arrange the left and right pad portions 161 and 162 at an optimal position for infant safety during use, when the shoulder pad assembly 16 is attached to the upper shoulder belt hole 17, It is necessary that the length _{xn of} the pad connecting string body 163 extending forward is longer. That is, the optimal length x _n is a vertically due to the height h _n parameters from the seat 12 to the n shoulder belt hole is selected to match the infant stature.

Here, in Table 1 below, the height h _{n of} the n-th shoulder belt hole from the seat portion 12 and the length x _n required for arranging the left and right pad portions 161 and 162 at the optimum positions are as follows. An example of a comparison table is shown.

According to Table 1, for example, in FIG. 6, when the fourth shoulder belt hole 174 is provided at a height of 325 mm above the seat portion 12, that is, when h ₄ = 325 mm, the left and right pad portions 161. , 162 is 27.5 mm in length x ₄ required to place the lens at the optimum position. This x ₄ than the value and (9), so that the thickness t ₄ of the optimal backrest 13 is determined. That is, the child seat 11 according to the present embodiment has a pad connecting string length x extending forward from the shoulder belt hole 17 by appropriately setting the thickness t _n of the backrest 13 based on the above conditions. It becomes possible to optimize _n .

  According to this configuration, as shown in FIG. 6, the user selects the fourth shoulder belt hole 174 provided at a position that matches the height of the infant C, and the shoulder pad assembly is inserted into the fourth shoulder belt hole 174. The left and right pad portions 161 and 162 are arranged so as to abut from the upper shoulder of the infant C to the vicinity of the chest according to the body width of the infant C that grows with the growth of the infant C. Is possible. Accordingly, it is possible to prevent both the shoulders or necks of the infant C from coming into contact with the shoulder belts 18 and 19 and causing scratches, and to effectively prevent the infant C from moving forward in a collision accident. Can do. In addition, it is not necessary to provide separate members for adjusting the positions of the left and right pad portions 161 and 162, and is also suitable for mass production of the product, so that the above effects can be obtained while suppressing manufacturing costs. .

Here, as a reference, the case where the child seat 11 according to the present embodiment is applied to an infant D who is young will be described with reference to FIG. FIG. 8 is a side cross-sectional view showing a state in which the child seat 11 shown in FIG. Referring to FIG. 8, in this case, the first shoulder belt hole 171 is selected as the shoulder belt hole that matches the height of the infant D, and the left and right shoulder belts 18, 19 and the shoulder pad assembly 16 are inserted therethrough. ing. Further, the vertical height from the seat portion 12 to the first shoulder belt hole 171 is h ₁ shown in FIG. 8, and for example, referring to Table 1 above, h ₁ = 190 mm. Length _{x 1} needed to optimize the arrangement of the right and left pads 161 and 162 in this case is 5 mm. The thickness t ₁ of the backrest 13 at a position where the first shoulder belt hole 171 is provided,
t ₁ ≒ (L ₀ -d ₀ -2x ₁ ) / 2 (10)
Is set as appropriate. Thus, just by inserting the shoulder pad assembly 16 through the first shoulder belt hole 171 and attaching it, the left and right pad portions 161 and 162 abut from the upper shoulder of the infant D to the vicinity of the chest as shown in FIG. Will be arranged as follows.

  Next, a child seat 41 according to still another embodiment of the present invention will be described with reference to FIGS. FIG. 9 is an external view of a child seat 41 according to still another embodiment of the present invention as viewed from the right rear side. FIG. 10 is a side sectional view showing a state in which the infant C is seated on the child seat 41 shown in FIG. 9, and corresponds to FIG. FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10 and viewed from above, and corresponds to FIG.

Referring to FIGS. 9 to 11, a child seat 41 according to this embodiment includes a seat 12 includes a seat body 44 of the backrest portion 43 having a constant thickness t _0. As in the embodiment shown in FIGS. 1 and 2, a plurality of pairs of left and right shoulder belt holes 17 are provided in the backrest 43 in the vertical direction, and the left shoulder belt hole 17a and the right shoulder belt hole 17b The distance d ₀ between them (shown in FIG. 9) is set to be the same.

A rib 45 that protrudes rearward from the back surface 46 is provided on the back surface 46 of the backrest portion 43, and a pad connecting string 163 is stretched over the rib 45. The rib 45 is a protruding rib that is provided at the center in the left-right direction on the back surface 46 of the backrest 43 and extends continuously from the lower side of the first shoulder belt 171 to the upper side of the fifth shoulder belt 175 in the vertical direction. , Has a constant width r ₀ in the left-right direction. Here, the rib 45 is formed so that the height w of the rib 45 from the back surface 46 to the rib rear end portion 47 gradually decreases as it goes upward from the lower end portion of the rib 45. More specifically, the height of the rib 45 at the position of the first shoulder belt hole 171 is w _1, and the height of the rib 45 at the position of the second shoulder belt hole 172 is w ₂ in the following order. The height of the rib 45 at the position of 173 is w ₃ , the height of the rib 45 at the position of the fourth shoulder belt hole 174 is w ₄ , and the height of the rib 45 at the position of the fifth shoulder belt hole 175 is w _5. ,
w ₁ > w ₂ > w ₃ > w ₄ > w ₅ (20)
The rib 45 is provided so that it may satisfy | fill.

Here, the case where the left and right shoulder belts 18 and 19 and the shoulder pad assembly 16 are inserted into the fourth shoulder belt hole 174 is considered as in the above embodiment. In this case, the path length K ₄ passing from the front opening 22 of the fourth left shoulder belt hole 174a to the front opening 23 of the fourth right shoulder belt hole 174b through the back surface of the backrest portion 43 has a rib height W ₄ and a rib width. The length depends on r ₀ , the backrest thickness t ₀ , and the distance d ₀ between the fourth shoulder belt holes 174. That is, of the pad connecting string 163 stretched over the backrest 43, the fourth right shoulder belt passes through the rib 45 provided on the back 46 of the backrest 43 from the front opening 22 of the fourth left shoulder belt hole 174a. The string spanning length L _{4, which} is the length of the hole 174 b reaching the front opening 23, is the rib height W ₄ , the rib width r ₀ , the backrest thickness t ₀ , and the fourth shoulder belt hole 174. the length according to the distance d _0.

Similarly to the above embodiment, the length of the portion of the pad connecting string 163 extending from the front opening 22 of the fourth left shoulder belt hole 174a to the front side and reaching the upper end of the left pad portion 161 is x _4. And That is, the fourth right shoulder belt Likewise x ₄ the length of the portion extending from the hole 174b of the front opening 23 to the upper end of the right pad portion 162 extending toward the front.

Then, the total length L ₀ of the pad connecting string 163 extending from the upper end of the left pad part 161 to the upper end of the right pad part 162 extends forward from the string body stretch length L ₄ and the fourth shoulder belt hole 174. It will be expressed as the sum of the length x ₄ × 2 of the pad connecting string 163 to be taken out. Therefore, the length x ₄ is a length depending on the rib height W ₄ , the total length L ₀ , the rib width r ₀ , the backrest thickness t ₀ , and the distance d ₀ between the fourth shoulder belt holes 174.

Generalizing the above, in the n-th shoulder belt hole provided at the n-th position from the lowermost position in the backrest portion 43, the n-th right shoulder belt passes through the back surface of the backrest portion 43 from the front opening of the n-th left shoulder belt hole. path length K _n extending to the front opening of the hole, the height W _n of the rib 45 at the position of the n shoulder belt _holes, the width r ₀ of the rib _45, the thickness t ₀ of the backrest _43, and the n shoulder belt hole the length according to the distance d _0. That is, among the pad connecting cords 163 stretched over the backrest portion 43, it passes through the rib 45 provided on the back surface 46 of the backrest portion 43 from the front opening of the nth left shoulder belt hole, The string spanning length L _n which is the length of the portion reaching the front opening depends on the rib height W _n , the rib width r ₀ , the backrest thickness t ₀ , and the n-th shoulder belt hole interval d ₀ . It becomes length.

Here, as shown in the above (20), the height w _n of the ribs 45 in the position of the n shoulder belt hole, the position of the (n + 1) shoulder belt holes adjacent in the n-th shoulder belt holes and upper The height w _{n + 1} of the rib 45 in the case satisfies w _n > w _{n + 1} . In the present embodiment, the total length L ₀ , the rib width r ₀ , the thickness t ₀ , and the interval d ₀ are constant numerical values. Accordingly, the path length K _n in the n-th shoulder belt hole and the path length K _{n + 1} in the (n + 1) -th shoulder belt hole adjacent above the n-th shoulder belt hole satisfy the relationship of K _n > K _{n + 1} . That is, the string body stretch length L _n when the shoulder pad assembly 16 is inserted into the nth shoulder belt hole, and the string body when the shoulder pad assembly 16 is inserted into the (n + 1) th shoulder belt hole. the tension passes length _{L n + 1,} would meet _{L n>} L n _{+ 1.}

That is, the seat body 44 according to this embodiment, since it is configured such that the path length K _n is shorter in the shoulder belt holes 17 more provided above, provided more upward shoulder pad assembly 16 When attached to the shoulder belt hole 17 formed, the stretched length L _{n of the} pad connecting string body 163 passing through the back surface of the backrest portion 43 becomes shorter. That is, the length _xn of the pad connection string body 163 extending forward from the shoulder belt hole 17 becomes longer.

Length x _n of the pad connecting cord 163 extending frontward from the n shoulder belt holes, so that due to the rib height W _n at the position of the first n shoulder belt hole. Further, as illustrated in Table 1, the length x _n is appropriately determined by the vertical height h _n from the seat 12 to the n shoulder belt hole. In other words, the child seat 41 according to the present embodiment, by suitably setting the rib height W _n at the position of the first n shoulder belt hole based on the conditions as described above, the pad extending from the shoulder belt hole to the front side It is possible to optimize the connecting string length _xn .

  According to this configuration, as shown in FIG. 10, the user selects the fourth shoulder belt hole 174 provided at a position that matches the height of the infant C, and the shoulder pad assembly is inserted into the fourth shoulder belt hole 174. By simply inserting and attaching 16, the left and right pad portions 161 and 162 can be arranged at optimal positions according to the body width of the infant C that increases as the infant C grows. Accordingly, it is possible to prevent both the shoulders or necks of the infant C from coming into contact with the shoulder belts 18 and 19 and causing scratches, and to effectively prevent the infant C from moving forward in a collision accident. Can do. In addition, it is not necessary to provide separate members for adjusting the positions of the left and right pad portions 161 and 162, and is also suitable for mass production of products, so that the above effects can be obtained while suppressing manufacturing costs. It is.

In the present embodiment, the projecting rib 45 that is continuous in the vertical direction is provided as a rib for optimizing the length _xn of the pad connecting string 163 extending forward from the nth shoulder belt hole. Although the case has been described, the present invention is not limited to this, and various rib shapes capable of providing the above-described effects are conceivable. 12 and 13 show examples of such ribs. 12 and 13 are cross-sectional views corresponding to FIGS. 7 and 11.

Referring to FIG. 12, in this embodiment, a cylindrical rib 48 is provided on the back surface 56 of the backrest portion 53 so as to surround the shoulder belt hole 17. By setting the height W _n of the cylindrical rib 48 as appropriate, to adjust the path length K _n extending to the front opening of the street right shoulder belt hole 17b of the rear of the backrest 53 from the front opening of the left shoulder belt holes 17a Is possible. That is, the length _xn of the pad connecting string 163 passing over the rib 48 can be adjusted to optimize the length _xn . In addition, even if it is a rib which surrounds a part of the center side of the backrest part 53 in the shoulder belt hole 17 without providing so as to surround the entire periphery of the shoulder belt hole 17 like the cylindrical rib 48 shown in FIG. Good.

Referring to FIG. 13, in this embodiment, a rib 49 that protrudes rearward from the back surface 56 of the backrest 53 and extends in a circular arc shape from the left shoulder belt hole 17a to the right shoulder belt hole 17b is formed. . The pad connecting string 163 is stretched so as to contact the rear surface 50 of the rib 49. In this case, by setting the height and radius of curvature of the ribs 49 appropriately adjusting the path length K _n extending to the front opening of the street right shoulder belt hole 17b of the rear of the backrest 53 from the front opening of the left shoulder belt holes 17a Is possible. That is, the length _xn of the pad connecting string 163 passing over the rib 49 can be adjusted to optimize the length _xn .

Thus, the ribs provided on the back surface of the backrest portion in a child seat according to the present invention, appropriately cords Upholstery pass length L _n of the pad connecting cord 163 passing over ribs in accordance with the conditions of Table 1 It is for adjustment. Therefore, if the pad connecting string body 163 adjusts the path length that passes from the left shoulder belt hole 17a to the right shoulder belt hole 17b on the back side of the backrest part as appropriate according to the above conditions, Any shape of rib is applicable to the present invention.

Further, in the present embodiment has dealt with the case of adjusting the cords Upholstery pass length L _n of the pad connecting cords 163 by the rib provided between the left shoulder belt holes 17a and the right shoulder belt hole 17b, Not limited to this, for example, a string connecting portion 163 provided at a predetermined position above or below the pair of shoulder belt holes 17 and extending from the left shoulder belt hole 17a to the back side of the backrest portion is the It is good also as a structure which reaches the right shoulder belt hole 17b via a string body insertion part. In this case, by appropriately setting the distance between the cords insertion portion and the shoulder belt hole 17, to adjust the cords Upholstery pass length L _n of the pad connecting cords 163, the length x _n Can be optimized.

In the above embodiment, the path length K _n extending to the front opening of the rear street right shoulder belt hole of the backrest from the front opening of the left shoulder belt _holes, i.e., in the above embodiment, stretched its path The stretched length L _n of the pad connecting string is adjusted by the thickness t _{n of} the backrest portion or the height w _{n of the} rib provided on the back surface of the backrest portion, and extends forward from the shoulder belt hole. The configuration for optimizing the length x _n of the pad connecting string body to be described has been described, but the concept of the present invention is that the path length K _n (that is, the string body spanning length L _n ) is determined by the left and right shoulder belt holes. The arrangement of the pad portion is optimized by providing a configuration that is appropriately adjusted according to the position in the vertical direction provided. Therefore, the present invention is not limited to the above-described embodiment, and any configuration is included in the scope of the present invention as long as the path length K _n (string spanning length L _n ) is adjusted based on the above-described concept. It is what

Further, in the above embodiment, the case where the pad connection string body is configured by the string body that connects the left pad portion and the right pad portion has been described. It consists of a left pad connection string body for connecting the pad part to the backrest part and a right pad connection string body for connecting the right pad part to the backrest part, and the left and right pad connection string bodies are independent string bodies. It may be. In this case, for example, one end of the left and right pad connecting string body is drawn forward from the front opening of the left and right shoulder belt holes and connected to the left and right pad portions, and a locking member is attached to the other end. The structure latched by the back side opening part of a belt hole may be sufficient. Even when the pad connection string is configured in this manner, for example, when applied to the embodiment shown in FIG. 6 or FIG. 12, the pad connection string length _xn extending forward from the shoulder belt hole is set to the seat body. This is because the above-described effect can be obtained because optimization can be performed by the configuration.

  Moreover, in said embodiment, although the case where the pad connection string body which connects a left pad part and a right pad part was comprised by one string body was described, not only this but a pad connection string body However, it may be composed of a plurality of strings.

In the above embodiment, the length x _n is optimized by adjusting any one parameter of the thickness t _{n of} the backrest portion or the height w _n of the rib provided on the back surface of the backrest portion. However, the present invention is not limited to this, and a configuration in which both the thickness of the backrest portion and the height of the rib are appropriately adjusted to optimize the length _xn may be employed. That is, in order to optimize the length x _n , a plurality of means for adjusting the path length K _n (string spanning length L _n ) according to the above conditions may coexist.

  Further, in the above embodiment, the case where the shoulder pad assembly is used by being inserted into the left and right shoulder belt holes through which the left and right shoulder belts stretched over the left and right shoulders of the infant has been described. The shoulder pad assembly may be inserted into a shoulder belt hole other than the shoulder belt hole through which the left and right shoulder belts are inserted.

Further, in the above embodiment, the path length K _n ranging from one front opening of the n shoulder belt hole to the front opening of the street the other the back of the backrest portion, first adjacent in the n shoulder belt holes and upper ( n + 1) The case where the seat body is configured so that the path length K _{n + 1} extending from one front opening of the shoulder belt hole to the other front opening through the back of the backrest portion satisfies K _n > K _{n + 1} is described. However, the path length K _n in the n-th shoulder belt hole and the path length K _m in the m-th shoulder belt hole (m> n) provided above the n-th shoulder belt hole are not limited thereto. As long as K _n > K _m is satisfied, the above-described effects of the present invention are brought about.

In the above embodiment, the height h _n from the seat portion of the n-th shoulder belt hole and the length x _n of the pad connection string body extending forward from the shoulder belt hole are _expressed as comparison data. Although 1 is illustrated, it is not limited to this data. The optimum length _xn for the infant's height (that is, the position of the shoulder belt hole selected) has a predetermined numerical range, and is appropriately determined according to the application.

  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 is advantageous for all child-care equipment having a seat structure such as a baby carriage, a baby rack, and 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 an infant to be seated, and is advantageously used for all childcare devices having a seat structure.

  11, 41, 101 Child seat, 12 Seat part, 13, 43, 53 Backrest part, 14, 44 Seat body, 15 Restraint belt, 16 Shoulder pad assembly, 161 Left pad part, 162 Right pad part, 163, 105 Pad connection String body, 164 Non-slip portion, 165, 166 surface fastener, 167 fold line, 17, 171, 172, 173, 174, 175, 103 shoulder belt hole, 17a, 171a, 172a, 173a, 174a, 175a left shoulder belt hole, 17b, 171b, 172b, 173b, 174b, 175b Right shoulder belt hole, 18 Left shoulder belt, 19 Right shoulder belt, 20 Crotch belt, 21 Buckle, 22, 23, 104 Front opening, 45, 48, 49 Rib, 46 Back, 47 Rib rear end portion, 50 rear surface, 102 pad portion.

Claims (7)

A seat body having a seat for supporting an infant from below, and a backrest portion in which a plurality of paired shoulder belt holes are arranged at predetermined intervals in the vertical direction;
A left shoulder belt that is inserted through the left shoulder belt hole and pulled out forward and stretched over the infant's left shoulder; a right shoulder belt that is inserted through the right shoulder belt hole and pulled out forward and stretched over the infant's right shoulder; A restraining belt for restraining an infant on the seat body;
A left pad portion disposed in a region where the infant and the left shoulder belt contact each other, a right pad portion disposed in a region where the infant and the right shoulder belt contact each other, and the left and right pad portions are connected to the backrest portion. A shoulder pad assembly having a pad connection string body that is inserted through the shoulder belt hole through which the shoulder belt is inserted and pulled out to the front side and connected to the left and right pad portions, With
A pair of shoulder path length extending from the front opening to the front opening of the street the other the back of the backrest portion of one of the belt holes K _n located below, one front surface of the pair of shoulder belts hole located above than A seat structure for a child-care instrument, wherein a path length K _m from the opening to the other front opening through the back surface of the backrest portion satisfies K _n > K _m . The backrest has a shape in which the thickness gradually decreases toward the top,
The difference between the path lengths K _m and the path length K _n is the thickness of the backrest in the pair of shoulder belts hole located in the lower, the thickness of the backrest in the pair of shoulder belts hole located in the upper The seat structure of the child-care instrument according to claim 1, which is caused by the difference between   The pad connection string body is a string body that connects the left pad portion and the right pad portion, and one end is drawn forward from the front opening of the left shoulder belt hole and connected to the left pad portion, The childcare device according to claim 1 or 2, wherein the other end is drawn forward from the front opening of the right shoulder belt hole and connected to the right pad portion, and a central region thereof is stretched over the back surface of the backrest portion. Seat structure. A rib projecting rearward from the back surface is provided on the back surface of the backrest portion, and the pad connecting string stretched over the back surface of the backrest portion is stretched so as to pass over the rib,
The difference between the path lengths K _m and the path length K _n, said at the location of the the height of the rib at the location of the pair of shoulder belts hole located above a pair of shoulder belts hole located in the lower rib The seat structure of the childcare apparatus according to claim 3, which is caused by a difference from the height of the childcare apparatus.   The seat structure of the childcare apparatus according to claim 4, wherein the rib is a protruding rib provided between the plurality of pairs of shoulder belt holes on the back surface of the backrest portion and extending in the vertical direction.   The seat structure of the childcare apparatus according to claim 4, wherein the rib is a cylindrical rib provided on the back surface of the backrest portion so as to surround the shoulder belt hole. The seat structure of the childcare apparatus according to any one of claims 1 to 6, wherein the childcare apparatus is a child seat used in an automobile.

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