TWI834281B - child seat - Google Patents

Abstract

The object of the present invention is to make it easy for infants and young children to get on and off the vehicle. The child seat 1 is provided with spring member mounting holes 43 on the left and right sides outside the belt insertion hole 41 of the backrest shift part 14, and the front end of the spring member 70 installed in the spring member mounting hole 43 is directed toward the center of the left and right sides. Furthermore, the child seat 1 has the spring member receiving axis X84 of the shoulder belt cover 66 tilted relative to the belt insertion axis X83 on both left and right sides. Therefore, the child seat 1 does not interfere with the various parts unnecessarily, and when the seat belt group 4 is not used, the shoulder belts 62 and the like can be supported so as to expand toward the left and right outer sides as it travels forward. Makes it easy and smooth for infants and young children to get on and off the car.

Description

child seat

The present invention relates to a child seat, which is preferably suitable for use when installed in a car.

In the past, child seats were installed on the seats of vehicles such as automobiles and were widely used when infants and young children were riding in the vehicles. In addition, most child seats are provided with safety belts for restraining the seated infant to the child seat. The safety belt can securely restrain the infant to the child seat by, for example, connecting shoulder straps disposed near both shoulders of the infant to a crotch belt disposed near the crotch of the infant.

When this type of safety belt is not in use, the shoulder straps hang down due to gravity. Therefore, in a child seat, when an infant is seated, it is necessary to temporarily lift the shoulder strap, or after the infant is seated, it is necessary to pull the shoulder strap out from behind the infant, such as cumbersome operations.

Therefore, as a child seat, the following is proposed: By providing a rod-shaped pop-up portion protruding forward and upward obliquely on the underside of the shoulder strap, the shoulder strap can be easily lifted when the seat belt is not used. Infants and young children will get off the bus.

[Prior technical literature]

[Patent Document]

Patent Document 1: Japanese Patent Application Laid-Open No. 2019-26147 (Figure 1, etc.)

However, in the child seat with this structure, even if the shoulder strap is bounced upward by the pop-up part, the distance in the left and right directions is almost the same as when it is restrained, so the possibility of interference with the head of the infant is high. Therefore, there is a problem with child seats that requires cumbersome operations such as extending the shoulder straps to the left and right when infants and young children get in and out of the car.

The present invention was made in consideration of the above points, and it is intended to propose a child seat that can easily allow infants and young children to get on and off the vehicle.

In order to solve this problem, the child seat of the present invention is provided with: a backrest support body, which supports the back of the infant when the infant is seated; and an insertion hole, which is provided on the backrest support body. Near the shoulders of the infant and young child in the seat, it penetrates the backrest support body; the strap is inserted into the insertion hole to bind the infant's back to the backrest support body; the elastic body is inserted into the insertion hole of the backrest support body A protruding part is provided nearby toward the side where the infant is seated and is elastically deformable; and a belt linking part is configured so that the imaginary center line of the belt indicating the imaginary center line along the length direction of the belt is oriented from the front side when viewed by the infant toward the outside in the left and right direction. In this way, the belt and the elastic body are linked together in a state where they are tilted relative to the axis of the elastic body representing an imaginary central axis along the length direction of the elastic body.

The present invention can connect the elastic body and the belt through the belt linking part in a state where the center line of the belt is inclined relative to the axis of the elastic body. Therefore, in the present invention, when the elastic body is arranged toward the front side of the infant with respect to the backrest support, the belt front side can be set in a state where the belt front side is deployed outward in the left-right direction. Furthermore, the present invention can elastically deform the elastic body when fastening the belt, so that the belt can be deformed to fit the shape of the infant's body and be well restrained.

According to the present invention, it is possible to realize a child seat in which infants and young children can easily get on and off the vehicle.

1:Child seat

2: Child seat body

3: Outer cover

4:Safety belt group

11: Seating department

12:Backrest

13: Backrest base part

14: Backrest shifting part

21: Engagement part

22: Front part of backrest base

23: Front hole of backrest base

24:Slide rail

25:Latching slot

31: Head protection part

31A:Substrate

31B:Protective material

32: Backrest support part

32F:Front

32N: Opposite part of the neck

33:Clamping mechanism department

41:With insertion hole

41L: With insertion hole

41R:With insertion hole

42:With storage hole

42L: With storage hole

42R:With storage hole

43: Spring component mounting hole

43L: Spring component mounting hole

43R: Spring component mounting hole

51: Shaft guide

51D: Groove

52: engagement shaft

53: Operation delivery department

54: Hooking part

55:Ejection part

56:Shaft linkage body

56H: Insert hole

61: Crotch strap

62:Shoulder strap

62L: Shoulder strap

62R: Shoulder strap

63: Fastening strap

64:Buckle

65:Latch tongue

65L:Latch tongue

65R:Latch tongue

66: Shoulder strap cover

66L: Shoulder strap cover

66R: Shoulder strap cover

68:With stopper

70:Spring component

71:Protrusion

71S: Side boundary surface of protrusion

72: Insertion part

72A: columnar part

72B:Support Department

81: Cover body part

81L: Lower floor

81M:Middle level

81U:Upper level

82: Install belt part

83:With insertion space

84: Spring component storage space

85: mother-in-law buckle

86: Mother-and-son buckle

87:Seam

88:Seam

89: Anti-slip components

91:Seam

92:Plug-in space

101:Child seat

201:Child seats

C12: center line of backrest

X62: Shoulder strap center line

X70: spring axis

X83: With insertion axis

X84: Spring component receiving axis

Figure 1 is a schematic perspective view showing the structure of a child seat.

Figure 2 is a schematic perspective view showing the structure of the child seat body.

FIG. 3 is a schematic perspective view showing the structure of the backrest base part and the backrest displacement part.

Fig. 4 is a schematic perspective view showing the structure of the backrest shifting portion.

FIG. 5 is a schematic cross-sectional view showing the structure of the seat belt group.

6A and 6B are schematic perspective views showing the structure of the spring member.

FIG. 7 is a schematic diagram showing the structure of the spring member.

FIG. 8 is a schematic cross-sectional view showing the cross-sectional shape of the spring member.

Figure 9 is a schematic diagram showing the structure of the shoulder strap cover.

Figure 10 is a schematic cross-sectional view showing the structure of the shoulder strap cover.

Fig. 11 is a schematic cross-sectional view showing the structure of the left front portion of the backrest.

12A and 12B are schematic diagrams showing the status of the shoulder strap, shoulder strap cover, and spring member in an unbound state.

13A and 13B are schematic diagrams showing the shoulder strap, shoulder strap cover, and spring member in a restrained state.

14 is a schematic cross-sectional view showing the structure of the left front portion of the backrest of an imaginary child seat.

FIG. 15 is a schematic cross-sectional view showing the structure of the left front portion of the backrest of an imaginary child seat.

In the following, with respect to the modes for implementing the invention (hereinafter referred to as embodiments), we use The diagram explains.

[1. Composition of child seats]

FIG. 1 is a schematic perspective view showing the entire child seat 1 of this embodiment. The child seat 1 generally consists of a child seat body 2 with sufficient strength, an outer cover 3 covering the surface of the child seat body 2 that is in contact with infants, and a group of safety belts 4 that restrain the infant in a seated state. composition.

In this specification, when describing each component, the front direction, the rear direction, the upper direction and the lower direction when viewed from the infant seated in the child seat 1 are referred to as "front", "rear", "upper" and "upper" respectively. "Down". In addition, the left direction and the right direction when the infant sitting on the child seat 1 is viewed from the front are called "left" and "right" respectively. In addition, in the following figures, the cover 3 is omitted in order to clearly show the structure. In addition, in some figures, the seat belt group 4 is also omitted for convenience of explanation.

[1-1. Composition of the child seat body]

FIG. 2 is a schematic perspective view showing the entire child seat body 2 of this embodiment. The child seat body 2 is roughly composed of a seat portion 11 that mainly forms a seat surface, and a backrest portion 12 that mainly supports the upper body of the infant. Furthermore, the backrest portion 12 is composed of a backrest base portion 13 fixed to the seat portion 11 and a backrest displacement portion 14 on the front side of the backrest base portion 13 that can slide (displace) in the vertical direction.

Incidentally, the child seat body 2 of this embodiment is configured so that the seat portion 11 and the backrest portion 12 can be easily separated and rejoined. Therefore, when the child seat body 2 is stored in the trunk of a vehicle or the like when not in use, space can be saved by separating the seat portion 11 and the backrest portion 12 and combining them appropriately.

FIG. 3 is a schematic perspective view showing a state in which the backrest portion 12 of the present embodiment is separated into a backrest base portion 13 and a backrest displacement portion 14. Also, Figure 4 is shown from a different angle than Figure 3 A schematic perspective view of the state of the backrest displacement portion 14.

The backrest base 13 as the base of the backrest is formed into a rectangular parallelepiped shape which is longer in the up-down direction, slightly shorter in the left-right direction, and shorter in the front-rear direction. Parts protruding forward are formed on the upper portions of the left and right sides. Most of the backrest base portion 13 is made of a resin material, and a space is formed inside the backrest base portion 13 by a combination of parts that mainly form the front side or the inner side and parts that mainly form the rear side or the outer side. Furthermore, an engaging portion 21 for engaging with the seat portion 11 is formed in the lower portion of the backrest base portion 13 .

The front surface of the backrest base portion 13, that is, the backrest base front portion 22, is formed in a substantially flat planar shape, and a backrest base front hole 23 is formed in an upper 2/3 range near the center of the left and right sides, penetrating in the front-rear direction. In addition, a plurality of ventilation holes for ensuring ventilation are provided on the lower side or the left and right sides of the backrest base front hole 23 of the backrest base front portion 22 .

Furthermore, inside the backrest base portion 13, a plurality of slide rails 24 are arranged in a row with specific intervals in the left and right directions. Each slide rail 24 is formed in a rod shape or a thin plate shape that is long in the up and down direction, short in the front and rear direction, and thin in the left and right direction. Behind each slide rail 24, a plurality of engaging grooves 25 are arranged in an up-and-down direction. Each engaging groove 25 has a semicircular shape when viewed from the left and right directions.

The backrest displacement part 14 as the backrest support is composed of a head protection part 31 that occupies approximately 1/3 of the upper side, a backrest support part 32 that occupies approximately 2/3 of the lower side, and is provided behind the backrest support part 32 The side engaging mechanism part 33 is formed.

The head protection part 31 is composed of a thin plate-shaped base plate 31A located on the rear side, and a protective material 31B attached to the front side of the base plate 31A. The base plate 31A is composed of a left part and a right part. The left part extends from the left part to the left oblique front side of the plate-shaped central part located above the back support part 32; the right part extends from the right side of the central part. Partially extended to Right oblique front. The base plate 31A is a molded part made of a specific resin material and is integrally manufactured with the back support portion 32, and has sufficient strength by having sufficient thickness. The protective material 31B is made of, for example, expanded polystyrene or sponge material, has sufficient thickness, and has sufficient impact resistance.

The back support portion 32 is formed in a plate shape that is long in the up and down direction, slightly shorter in the left and right direction, and thin in the front and rear direction. It is formed with a plurality of holes penetrating in the front and rear direction or a plurality of ventilation holes to ensure ventilation. Specifically, the back support part 32 is provided with a belt insertion hole 41 (41L and 41R) and a belt storage hole 42 (42L and 42R) near the neck-facing portion 32N that faces the neck of the infant. , and spring member mounting holes 43 (43L and 43R), etc.

Each belt insertion hole 41 is respectively located on the left and right sides of the neck-facing portion 32N, that is, near the shoulders of the seated infant, for inserting some of the belts in the safety belt group 4 (details will be described below). For convenience of explanation, below, the belt insertion hole 41 will also be referred to as an insertion hole for short. Each belt storage hole 42 is located below the belt insertion hole 41 . The belt storage hole 42 is formed in a wide range in the vertical direction from the vicinity of the belt insertion hole 41 to the vicinity of the lower end of the back support portion 32 .

Each spring member mounting hole 43 is provided adjacent to the outer side of the left and right belt insertion holes 41 . The shape of the spring member mounting hole 43 is a rectangular shape when viewed from the front side, and is inclined downward as it proceeds in the rear direction from the front surface 32F of the back support portion 32 .

The engagement mechanism part 33 (Fig. 4) is composed of two shaft guides 51, an engagement shaft 52, an operation transmission part 53, a hook part 54, a push part 55, a shaft linkage body 56, and the like. Each shaft guide 51 is erected on the left and right behind the backrest support part 32 in the rearward direction between the belt insertion hole 41 and the spring member mounting hole 43 . The shaft guide 51 is formed in a plate shape that is long in the front-rear direction, short in the up-down direction, and thin in the left-right direction, and has a groove portion 51D that is elongated and dug forward in the vicinity of the center of the rear side.

The engaging shaft 52 is an elongated cylindrical metal member with sufficient length. the The engaging shafts 52 are respectively inserted into the groove portions 51D of the left and right shaft guides 51 to assume an attitude in which the central axis is aligned in the left-right direction. Therefore, when an external force is applied to the engagement shaft 52 , the engagement shaft 52 is hardly displaced in the up-down direction within the groove portion 51D, but can be displaced in the front-rear direction. In other words, the engagement shaft 52 is restricted from being displaced in the up-down direction by the shaft guide 51, but can be easily displaced in the front-rear direction.

The entire operation transmitting portion 53 is configured in a rod shape that is elongated in the vertical direction. The operation transmission part 53 is disposed near the center of the left-right direction on the rear side of the head protection part 31 and the backrest support part 32 and covers approximately half of the upper side of the backrest shift part 14. In addition, the operation transmission part 53 is movably supported by the head protection part 31 and the backrest support part 32, and can be displaced in a specific range in the up and down direction while maintaining the position in the front-rear direction and the left-right direction.

The hooking portion 54 has a shape similar to the outer peripheral portion of a trapezoid, and the protector can hook it with his fingertips to apply force in the upward direction. The hook portion 54 is mounted on the upper end of the operation transmission portion 53 and is configured to be rotatable relative to the operation transmission portion 53 about a rotation axis in the left-right direction.

The push portion 55 is a coil spring along the up and down direction, and is disposed below the operation transmission portion 53 . The upper end of the push part 55 is connected to the operation transmission part 53, the lower end is connected to the back support part 32, and is slightly extended from the natural state. Therefore, the urging portion 55 always urges the operation transmitting portion 53 downward.

The shaft linkage body 56 is provided on the rear side near the lower end of the operation transmission part 53 and is displaceable in the vertical direction integrally with the operation transmission part 53 . The shaft linking body 56 is formed into a rectangular parallelepiped shape as a whole, and has an insertion hole 56H penetrating in the left and right directions. The insertion hole 56H is formed along the inclined direction connecting the front upper side and the rear lower side, and the engaging shaft 52 is inserted therethrough.

According to this structure, when the hook portion 54 is not operated, the engagement mechanism portion 33 uses the action of the push portion 55 to position the operation transmitting portion 53 and the shaft linking body 56 on the lower side within the displaceable range. At this time, the engaging shaft 52 is located on the front and upper side in the insertion hole 56H of the shaft linkage body 56, and It is located on the front side inside the groove portion 51D of the shaft guide 51 . That is, the engagement mechanism part 33 is in the state shown in FIG. 4 .

On the other hand, when the protector applies an upward force to the hook portion 54, the engagement mechanism portion 33 is linked to the hook portion 54, and the operation transmission portion 53 and the shaft linking body 56 are displaced upward. At this time, the engaging shaft 52 moves in the insertion hole 56H of the shaft linkage body 56 to be located on the rear lower side, and moves in the groove portion 51D of the shaft guide 51 to be located on the rear side.

Thereafter, when a force is applied to the hooking part 54, the engagement mechanism part 33 pulls the operation transmission part 53 downward through the action of the push part 55, so that the operation transmission part 53 and the shaft linking body 56 are moved in the downward direction. The shiftable range is located on the lower side. Thereby, the engaging shaft 52 is located on the front and upper side again in the insertion hole 56H of the shaft linkage body 56 and is located on the front side in the groove portion 51D of the shaft guide 51 .

That is, the engagement mechanism part 33 can displace the operation transmission part 53 and the shaft linkage body 56 in the up and down direction according to whether an upward force is applied to the hook part 54, so that the engagement shaft 52 can move forward and backward in the groove part 51D. direction shift.

When the backrest portion 12 ( FIG. 2 ) is manufactured, the backrest displacement portion 14 is displaced from the front side to the backrest base portion 13 to come into contact with the backrest portion 12 ( FIG. 2 ). Furthermore, the backrest portion 12 allows the shaft guide 51 or the shaft linkage body 56 of the engagement mechanism portion 33 of the backrest displacement portion 14 to enter the backrest base front hole 23 of the backrest base portion 13 . At this time, the backrest displacement portion 14 restricts the movement in the left and right directions relative to the backrest base portion 13 by causing the guide rails (not shown) to approach or contact the left and right sides of the slide rail 24 .

Next, in the backrest portion 12 , on the rear side of the backrest base front portion 22 , the engaging shaft 52 passes through the rear side of the slide rail 24 and passes through the groove portion 51D of the shaft guide 51 and the insertion hole 56H of the shaft linking body 56 way to get through. Thereby, the backrest displacement part 14 is restricted from moving in the front-back direction with respect to the backrest base part 13.

The backrest portion 12 assembled in this way is in a state where the hook portion 54 of the engaging mechanism portion 33 is not operated. When the slide rail 24 is formed, the engaging shaft 52 is located on the front side of the groove portion 51D and engages with one of the engaging grooves 25 of the slide rail 24 . Thereby, the backrest portion 12 fixes the position of the backrest displacement portion 14 relative to the backrest base portion 13 . That is, the child seat 1 can well protect the head of the infant sitting in the seat through the head protection portion 31 of the backrest displacement portion 14 .

On the other hand, when the backrest portion 12 pulls the hook portion 54 of the engaging mechanism portion 33 in the upward direction, the engaging shaft 52 is positioned behind the groove portion 51D and is disengaged from the engaging groove 25 of the slide rail 24 state. Thereby, the backrest displacement part 14 can be displaced in the up and down direction along the slide rail 24 of the backrest base part 13 .

Furthermore, when the backrest 12 releases the force exerted on the hook portion 54, the engagement shaft 52 is engaged with the engagement groove 25 of the slide rail 24 at the position of the backrest displacement portion 14 at that time point or its closest position. Close, and fix the position of the backrest displacement part 14.

In this way, the child seat 1 can adjust the position (height) of the backrest displacement portion 14 relative to the backrest base portion 13 according to the body shape of the infant sitting there, and match the head protection portion 31 and the like to an appropriate position (height).

Incidentally, the front surface 32F of the backrest support portion 32 of the backrest portion 12 that becomes the backrest shift portion 14 is generally facing the front, but in detail, it is facing slightly obliquely upward. That is, the front surface 32F is an inclined surface in which the normal line thereof is slightly inclined obliquely upward from the front direction.

[1-2. Composition of seat belt group and outer cover]

The seat belt group 4 (Fig. 1) is composed of a plurality of belts or parts, and a part of them is installed or integrated into the child seat body 2. This seat belt group 4 is composed of a plurality of belts such as a crotch belt 61, a shoulder belt 62 (62L and 62R), a fastening belt 63, and parts such as a buckle 64, a lock tongue 65 (65L and 65R), and a shoulder belt cover 66. Among them, each of the crotch strap 61, the shoulder strap 62 and the fastening strap 63 is formed into a belt shape with a specific width and thickness and a sufficient length by weaving fibers in a specific manner. It is soft and has sufficient tensile strength.

The lower end of the crotch strap 61 is installed on the front side of the infant's crotch, and a buckle 64 is installed on the upper end. The shoulder straps 62 (62L and 62R) are installed on the left and right sides of the infant to connect the upper side of the shoulder and the outer side of the waist, and lock tongues 65 (65L and 65R) are inserted respectively. Furthermore, a shoulder strap cover 66 (66L and 66R) is inserted into each shoulder strap 62 respectively.

FIG. 5 shows a schematic cross-sectional view of the child seat body 2 . Pull the shoulder straps 62L and 62R respectively into the inside of the backrest base 13 from the strap insertion holes 41 (Fig. 3) of the backrest displacement part 14 located near the shoulders of the infant. Furthermore, the shoulder straps 62L and 62R are connected to a fastening strap 63 inside the backrest base portion 13 . For convenience of explanation, below, the shoulder strap 62 will also be referred to as a belt for short.

The fastening belt 63 runs downward inside the backrest base portion 13 and is pulled out from near the lower end of the backrest base portion 13 to the outside. In addition, the fastening belt 63 enters the inside of the seat portion 11 from the vicinity of the rear end of the seat portion 11 , travels forward, and is pulled forward from the vicinity of the front end of the seat portion 11 .

Furthermore, the shoulder straps 62 and the fastening straps 63 are slidably inserted into the backrest base portion 13 and the seat portion 11 in a longitudinal direction. In addition, near the front end of the seat portion 11, a fastening belt 63 is provided or a belt stopper 68 for releasing the fastening belt is provided.

The seat belt group 4 is configured such that the shoulder straps 62L and 62R pass through the upper or front side of the infant's shoulders when the infant is seated. The lock tongues 65L and 65R are assembled and then inserted into the buckle 64 , and then pull out the fastening belt 63 forward. Thereby, the seat belt group 4 can restrain the infant's shoulders to the waist to the backrest 12 of the child seat body 2, thereby maintaining the infant in a seated state. Hereinafter, this state is called a bound state.

Furthermore, when a large infant, for example, is seated in the child seat 1, the seat belt group 4 may not be used but the seat belt of the vehicle may be used. At this time, in child seat 1, by placing the shoulder A part of the strap 62 and the shoulder strap cover 66 is inserted into the strap storage hole 42 ( FIG. 3 ), and can be stored inside the backrest base 13 .

The outer cover 3 (Fig. 1) is composed of a combination of cloth or sponge materials and is divided into various parts, each of which has sufficient flexibility. Furthermore, the outer cover 3 is divided into a plurality of parts, and each part is configured to be attachable and detachable to the child seat body 2 or the seat belt group 4 described below.

[2. Composition of spring components]

FIGS. 6A and 6B are respectively schematic perspective views showing the entire spring member 70 when viewed from different directions. FIG. 7 is a schematic left side view showing the entire spring member 70 . FIG. 8 is a schematic cross-sectional view showing the A1-A2 section of FIG. 7 .

The spring member 70 which is an elastic body is formed into an elongated rod shape as a whole, and has a shape that is gently curved so as to protrude upward along the imaginary spring axis X70 (Fig. 7). In addition, the spring member 70 is a molded part of a resin material such as TPE (Thermoplastic elastomer), and elastically deforms when an external force is applied. Incidentally, FIG. 6A , FIG. 6B and FIG. 7 all show the shape of the spring member 70 in its natural state when no external force is applied. In addition, below, the spring axis X70 will also be called an elastic body axis.

The spring member 70 is composed of a protruding portion 71 that occupies approximately 5/6 of the front side, and an insertion portion 72 that occupies approximately 1/6 of the rear side. As shown in FIG. 8 , the protruding portion 71 has a substantially oval cross-section, is thinner near the front end, and gradually becomes thicker as it proceeds toward the rear. In addition, the rearmost portion of the protruding portion 71, that is, the boundary portion with the insertion portion 72, is partially thicker in the downward and left-right directions than the surrounding portion. Furthermore, the protrusion side boundary surface 71S, which is the boundary surface between the protrusion portion 71 and the insertion portion 72, is formed in a planar shape, but its normal line is inclined at about 45 degrees with respect to the tangent line of the spring axis X70.

The insertion part 72 is composed of an upper columnar part 72A and a lower support part 72B. The columnar portion 72A is formed into a square columnar shape as a whole along the spring axis X70. The support portion 72B is formed to A rectangular parallelepiped shape arranged adjacent to the rear side of the protrusion side boundary surface 71S.

[3. Composition of shoulder strap cover]

FIG. 9 is a schematic top view showing the entire left shoulder strap cover 66L. FIG. 10 is a schematic cross-sectional view showing the B1-B2 section in FIG. 9 . For the sake of convenience, the description will be made by assuming that the front side of the paper in FIG. 9 is the upward direction and the opposite side is the downward direction. Furthermore, the lower side of the figure is the front direction and the upper side of the figure is the rear direction.

Incidentally, the right shoulder strap cover 66R (Fig. 5) and the left shoulder strap cover 66L are configured to be symmetrical in left and right directions. Therefore, in the following description, the left shoulder strap cover 66L is used as an example, and the description of the right shoulder strap cover 66R is omitted.

The shoulder strap cover 66 as a belt linking part is made of a plurality of soft cloth or strip-shaped materials, and roughly has a cover body part 81 and an attachment belt part 82 . The cover body 81 is generally configured in a rectangular parallelepiped shape or a thin plate shape that is long in the front-rear direction, short in the left-right direction, and thin in the up-down direction.

In addition, as shown in FIG. 10 , the cover main body 81 is divided into three layers in the vertical direction: an upper layer 81U, a middle layer 81M, and a lower layer 81L. Inside the cover body 81, a belt insertion space 83 is formed between the middle layer 81M and the lower layer 81L, and a spring member receiving space 84 is formed between the upper layer 81U and the middle layer 81M.

The insertion space 83 is formed by closing the left and right portions of the middle floor 81M and the lower floor 81L, and opening the front and rear vicinity, thereby forming a space that penetrates in the front-rear direction. Therefore, the cover body portion 81 allows the shoulder strap 62L to be inserted into the strap insertion space 83 in the front-rear direction. In other words, the cover body 81 allows the shoulder strap 62L to be inserted into the belt insertion space 83 along the imaginary belt insertion axis X83 ( FIG. 9 ) indicating the length direction of the belt insertion space 83 .

In the spring member storage space 84 as the elastic body storage space, the left part, the right part and the front end part of the middle layer 81M and the upper layer 81U are closed. On the other hand, only the rear part is closed. About 1/3 of the left side near the edge is open. Furthermore, snap-on buckles 85 and 86 are respectively attached to the cover body 81 so as to penetrate the middle layer 81M and the lower layer 81L and sandwich it from top to bottom. The snap button 85 is disposed approximately in the center in the left-right direction, and extends from the back to the front about 1/4 of the front-to-back length. The snap button 86 is provided approximately in the center in the left-right direction and near the front.

Furthermore, the cover body 81 is provided with seams 87 and 88 for sewing the middle layer 81M and the upper layer 81U. The seam 87 connects the vicinity of the left rear apex of the cover body 81 and the vicinity of the snap buckle 86 to form a straight line inclined with respect to the front and rear direction. The seam 88 connects a portion slightly to the right of the rear center of the cover body 81 and near the snap button 86 to form a straight line substantially parallel to the seam 87 .

In this way, the spring member receiving space 84 limits the range on the left side by the seam 87 and the snap button 86 , and limits a part of the range on the right side by the seam 88 and the snap button 85 . Therefore, the housing body 81 can accommodate the protruding portion 71 of the spring member 70 in the spring member receiving space 84 along the seam 87 . In other words, the cover body 81 can accommodate the spring member 70 in the spring member receiving space 84 by aligning the length direction of the spring member 70 along the imaginary spring member receiving axis X84 ( FIG. 9 ) that is substantially parallel to the seam 87 .

The attachment belt part 82 (FIG. 9) is attached near the rear end of the lower surface of the lower layer 81L of the cover body part 81. The mounting belt portion 82 is composed of a strip of material that is folded back near the rear end. By providing a seam 91 near the rear end, an mounting insertion space 92 is formed on the rear end side. The installation insertion space 92 is a space that penetrates in the left and right directions. In addition, a specific anti-slip member 89 is provided on a portion of the lower surface of the lower layer 81L of the cover body portion 81 in front of the mounting belt portion 82 (Fig. 10).

[4. Installation of shoulder strap cover and retention of spring components]

Next, attachment of the shoulder strap cover 66 to the backrest portion 12 (see FIG. 2 and others) and holding the shoulder strap cover 66 and the shoulder strap 62 by the spring member 70 will be described.

As mentioned above, the backrest base part 13 and the backrest displacement part 14 (FIGS. 3 and 4) are combined during manufacture of the backrest part 12. At this time, in the backrest portion 12 , on both the left and right sides, the mounting belt portion 82 of the shoulder belt cover 66 is inserted into the belt insertion hole 41 from the front side of the backrest displacement portion 14 , and the engaging shaft 52 is inserted into the mounting insertion space. 92.

Furthermore, when the seat belt group 4 (Fig. 1 and Fig. 5) is assembled in the backrest portion 12, the left and right shoulder straps 62 are inserted into the belt insertion space 83 (Fig. 10) of the shoulder strap outer cover 66, and then The passband is inserted into the through hole 41.

According to this configuration, in the child seat 1 , when the front side of the shoulder belt 62 is displaced in the up-down direction or left-right direction relative to the backrest 12 and deformed into various shapes, the shoulder belt cover 66 is also deformed integrally with the shoulder belt 62 , that is, The two can be linked together.

Incidentally, as explained with reference to FIG. 5 , the shoulder strap 62 can be pulled forward from the shoulder strap insertion hole 41 . On the other hand, since the engaging shaft 52 is inserted into the installation insertion space 92, the shoulder belt cover 66 cannot be pulled out in the forward direction.

For example, when a car equipped with a child seat 1 brakes suddenly while moving forward, an infant seated in the child seat 1 will fly out in the forward direction together with the shoulder strap 62 due to the inertial force. However, in the child seat 1, since the pair of anti-slip members 89 of the shoulder belt cover 66 exerts a large friction force on the shoulder portion of the infant, the infant can be maintained in a seated state.

In addition, in the child seat 1, one spring member 70 is installed on each of the left and right sides of the backrest portion 12 (Fig. 6A, Fig. 6B, etc.). Specifically, in the spring member 70 , after most of the protruding portion 71 is received in the spring member receiving space 84 of the shoulder belt cover 66 from the front end side, the insertion portion 72 is inserted into the spring member mounting hole 43 of the backrest shift portion 14 . Thereby, in the child seat 1, the protruding portion 71 of the spring member 70 and the shoulder belt cover 66 can be deformed integrally, that is, the two can be interlocked. Incidentally, the spring member 70 can be easily attached and detached from the spring member mounting hole 43 by a protector.

Here, FIG. 11 is a schematic cross-sectional view showing the left front portion of the backrest portion 12 as the center. In addition, the backrest center line C12 is an imaginary straight line indicating the center of the backrest 12 in the left-right direction. Furthermore, the shoulder belt center line X62 is an imaginary center line along the length direction of the shoulder belt 62 . For convenience of explanation, below, the shoulder belt center line X62 will also be referred to as the belt center line.

In a natural state where no external force is applied, the spring member 70 has a shape in which the spring axis X70 is oriented toward the center in the left-right direction and is oriented obliquely forward and upward in the up-down direction. Since the shoulder strap outer cover 66 receives the spring member 70 in the spring member receiving space 84, the spring member receiving axis X84 is substantially consistent with the spring axis X70. In addition, since the shoulder strap 62 is inserted into the strap insertion space 83 of the shoulder strap outer cover 66, the strap insertion axis X83 is substantially consistent with the shoulder strap center line X62.

That is, the shoulder belt cover 66 can maintain a state in which the shoulder belt center line X62 of the shoulder belt 62 is always inclined relative to the spring axis X70 of the spring member 70 . Therefore, in the child seat 1 , when no external force is applied to the spring member 70 , the child seat 1 is in the following state, that is, on the horizontal plane, the spring axis X70 is moved forward and backward in the forward and backward directions, and the shoulder strap center line X62 is laterally separated from the front. The backrest is tilted in the direction of center line C12.

Therefore, in the child seat 1, as shown in FIGS. 12A and 12B, when the shoulder strap group 4 is not used, the front side portion such as the left shoulder strap 62L is positioned to the upper left side of the rear side, and the right side is positioned The front part of the shoulder strap 62R is located further to the upper right side than the rear side. In other words, in the child seat 1 , the left and right shoulder straps 62 and the like are formed in a shape such that they are directed obliquely upward as they travel toward the front side, and are opened outward in the left-right direction. Hereinafter, this state is called an unbound state.

On the other hand, when the child seat 1 is set to the restrained state of fastening the seat belt, as shown in FIG. 5 , after combining the left and right lock tongues 65L and 65R, insert them into the buckle 64 , and then push the fastening belt 63 toward the buckle 64 . Pull out front.

At this time, in the child seat 1, as shown in Figures 13A and 13B, the shoulder straps 62 and shoulder The front side portion of the belt cover 66 is pulled toward the left and right center. Along with this, each spring member 70 receives a force from the shoulder strap cover 66 through the spring member receiving space 84 and becomes a shape deformed so as to deflect inwardly and downwardly on the left and right sides as it travels forward.

[5. Effects, etc.]

In the above structure, in the child seat 1 of this embodiment, the insertion portion 72 of the spring member 70 is inserted into the spring member mounting hole 43 provided in the backrest displacement portion 14 of the backrest portion 12 on both the left and right sides. In addition, in the child seat 1 on both left and right sides, the shoulder belt 62 is inserted into the belt insertion space 83 of the shoulder belt cover 66 , and the protruding portion 71 of each spring member 70 is accommodated in the spring member receiving space 84 .

Each spring member 70 is in a state in which the front end of the protruding portion 71 is directed toward the substantially center in the left-right direction (Fig. 11 and Fig. 12A). On the other hand, the shoulder belt cover 66 inclines the spring member storage axis X84 of the spring member storage space 84 in which the protrusion 71 is accommodated relative to the belt insertion axis X83 (Figs. 9 and 11).

Therefore, in the unrestrained state (Fig. 12A and Fig. 12B), the child seat 1 is in a state where the front end of the spring member 70 is directed toward the substantially center in the left-right direction, and can be supported in such a manner that it expands outward in the left-right direction as it travels forward. Shoulder strap cover 66 and shoulder strap 62 . Thereby, the child seat 1 does not require the protector to lift up the shoulder straps 62 and the like and extend them left and right, and the child seat 1 does not cause the shoulder straps 62 and the like to interfere with the infant's head, making it easy and smooth to get in and out of the car. .

In the child seat 1, in the restrained state (Fig. 13A and Fig. 13B), the front sides of the shoulder straps 62 and the like are pulled toward the center of the left and right. Correspondingly, the front ends of the spring members 70 are pulled toward the center of the left and right sides. The central and lower sides are deflected. Therefore, the child seat 1, like the previous child seat (not shown) that does not use the spring member 70, can make the seat belt group 4 closely contact the body of the infant and the infant, and can maintain the infant in a good sitting position. .

However, as a child seat, it is also considered to use a child seat similar to the child seat of this embodiment. The chair 1 has a different structure, and the front side of the shoulder straps 62 and the like is extended sideways to the left and right. As an example, consider a configuration in which the spring member accommodating space 84 is formed in the shoulder belt cover 66 (Fig. 9) so that the spring member accommodating axis X84 is parallel to the belt insertion axis X83, and the front ends of the spring member 70 are opposed to each other. The backrest shift portion 14 faces outward in the left-right direction.

FIG. 14 is a schematic cross-sectional view corresponding to FIG. 11 of the child seat 101 for comparison. The child seat 1 is configured such that a spring member mounting hole 43 is disposed between the belt insertion hole 41 and the engagement mechanism portion 33, and the rear end portion is directed obliquely inward.

Generally speaking, in a child seat, the position of the belt insertion hole 41 in the left and right directions must be determined according to the shoulder width of the infant. In addition, in the child seat, the position (height) of the backrest displacement portion 14 relative to the backrest base portion 13 can be adjusted in the backrest portion 12 (Fig. 3 and Fig. 4), and in order to ensure the required strength, the engagement mechanism portion 33 to a certain extent.

Therefore, in a structure like the child seat 101, since the spring member mounting hole 43 interferes with the engagement mechanism part 33 anyway, it becomes difficult to smoothly adjust the position (height) of the backrest displacement part 14 relative to the backrest base part 13. , or ensure sufficient strength.

FIG. 15 is a schematic cross-sectional view corresponding to FIGS. 11 and 14 of the child seat 201 for comparison. Like the child seat 1 , this child seat 201 has a spring member mounting hole 43 disposed outside the belt insertion hole 41 in the left-right direction, but the rear end of the spring member mounting hole 43 faces obliquely inward.

In the structure of the child seat 201, when the spring member 70 is tilted at an appropriate angle, the spring member mounting hole 43 and the belt insertion hole 41 may interfere, or the spring member 70 and the head protection part 31 may interfere. The protective material 31B interferes.

In this way, when the spring axis X70 of the spring member 70 is tilted relative to the front-rear direction, like the child seats 101 and 201, there is a spring member mounting hole 43 and an engaging mechanism part. 33 may interfere with the insertion hole 41 or the spring member 70 may interfere with the protective material 31B.

On the other hand, in the child seat 1 of this embodiment, as shown in FIG. 11 , the spring member mounting hole 43 is arranged outside the belt insertion hole 41 in the left-right direction, and its rear end is directed toward the center in the left-right direction.

Thereby, the child seat 1 can reliably prevent the spring member mounting hole 43 from interfering with the engagement mechanism portion 33 or the belt insertion hole 41 , or the spring member 70 with the protective material 31B of the head protection portion 31 from interfering. In addition, since the child seat 1 only needs to make the spring member mounting hole 43 a hole facing the left and right center, the occupying range in the left and right directions can be suppressed to a minimum.

Furthermore, in the child seat 1, the spring member accommodation axis X84 of the shoulder belt cover 66 is inclined relative to the belt insertion axis X83 (Fig. 9). Therefore, when the seat belt group 4 is not used in the child seat 1 , the spring member 70 can be set toward the center in the left-right direction, and the front sides of the shoulder straps 62 and the like can be pulled outward to the left and right.

Furthermore, the child seat 1 is configured such that the spring member 70 is detachable from the spring member mounting hole 43 of the backrest displacement portion 14 . Therefore, in the child seat 1, for example, when a large infant is seated and the seat belt on the vehicle side is used, that is, when the seat belt group 4 is not used, the spring member 70 can be removed. Thereby, in the child seat 1, it is possible to prevent the spring member 70 from interfering with the shoulder portion of the infant when the seat belt group 4 is not used.

Furthermore, the spring member 70 has an elliptical cross-sectional shape of the protrusion 71 crossing the spring axis X70 (Fig. 8). Therefore, the spring member 70 can easily deflect not only in the direction of displacing the front end up and down, but also in the direction of displacing the front end left and right, and there is almost no difference in the degree of deflection depending on the direction. Thereby, in the child seat 1 , when the shoulder belts 62 etc. are pulled inward to the left and right in order to insert the locking tongue 65 of the seat belt group 4 into the buckle 64 , the spring member 70 can be easily deformed, and the shoulder belts 62 etc. can be easily deformed. Closely attached to the shoulders of infants and young children.

In addition, the spring member 70 is configured to have a left-right symmetrical shape without causing the protruding portion 71 to deflect in the left-right direction relative to the insertion portion 72 (Figs. 6A, 6B, 7, and 8). Therefore, in the child seat 1, the spring members 70 provided on each of the left and right sides can be made into mutually equivalent parts, that is, parts can be made common. Thereby, in the child seat 1, when the protector installs the spring members 70 in the left and right spring member mounting holes 43 of the backrest displacement part 14, the protector can easily install the spring members 70 without having to worry about the left and right sides.

Furthermore, the shoulder belt cover 66 is provided with a spring member receiving space 84 above the belt insertion space 83 (Fig. 10). Therefore, in the child seat 1, when fastening the seat belt group 4, there is no need to sandwich the spring member 70 between the shoulder belt 62 and the infant's shoulder, thereby causing no discomfort to the infant.

According to the above structure, the child seat 1 is provided with spring member mounting holes 43 on the left and right sides outside the strap insertion hole 41 of the backrest shift part 14, and the front end of the spring member 70 is installed in the spring member mounting hole 43. Towards the center of the left and right. Furthermore, the child seat 1 has the spring member receiving axis X84 of the shoulder belt cover 66 tilted relative to the belt insertion axis X83 on both left and right sides. Therefore, the child seat 1 does not interfere with the various parts unnecessarily, and when the seat belt group 4 is not used, the shoulder belts 62 and the like can be supported so as to expand to the left and right outer sides as the child seat 1 travels forward. Makes it easy and smooth for infants and young children to get on and off the car.

[6. Other embodiments]

In addition, in the above embodiment, the case where the spring member 70 is formed of a molded part of a resin material has been described. However, the present invention is not limited to this, and may be made of various other materials such as metal. In addition, the shape is not limited to one rod, and may be formed into various shapes such as a spiral shape such as a coil spring.

Furthermore, in the above-mentioned embodiment, it has been explained that the spring member 70 has a large cross-section. Resulting in an elliptical shape (Figure 8). However, the present invention is not limited to this, and the cross section of the spring member 70 may be made into various other shapes such as a substantially circular shape, a substantially rectangular shape, or a substantially hexagonal shape. In short, it only needs to be a shape that can be easily bent in the left and right directions in addition to the up and down directions.

Furthermore, in the above-mentioned embodiment, the case where the spring axis X70 of the spring member 70 is gently curved so as to protrude upward has been described (Figs. 6A, 6B and 7). However, the present invention is not limited to this. For example, the spring axis X70 may be formed into a linear shape, or may be formed into various shapes such as a polygonal shape that is bent at a plurality of bending points.

Furthermore, in the above embodiment, the case where the spring member 70 is configured to be detachable from the backrest displacement portion 14 has been described. However, the present invention is not limited to this. For example, the spring member 70 may be fixed to the backrest displacement part 14 , or the spring member 70 may be configured to be rotatable upward or downward relative to the backrest displacement part 14 . , can be stored when not in use.

Furthermore, in the above embodiment, the case where the spring member receiving space 84 is provided in the shoulder belt cover 66 independently from the belt insertion space 83 has been described (Figs. 9 and 10). However, the present invention is not limited to this. For example, a space for inserting the spring member 70 into the inside of the belt insertion space 83 may be provided. Alternatively, the spring member receiving space 84 may not be formed, and the spring member 70 may be engaged with a specific member on the shoulder strap outer cover 66 side through a specific member. Furthermore, the spring member 70 may be integrated with the shoulder belt cover 66 and cannot be separated. In short, it suffices as long as the state in which the spring axis X70 is tilted relative to the belt insertion axis X83 can be maintained.

Furthermore, in the above embodiment, the case where the belt insertion space 83 is formed in the shoulder belt cover 66 and the shoulder belt 62 is inserted has been described. However, the present invention is not limited to this. For example, various configurations may be adopted, such as omitting the strap insertion space 83 and providing a specific clamp in the shoulder strap outer cover 66 so that a part of the shoulder strap 62 is clamped by the clamp. In short, it is sufficient as long as the shoulder belt cover 66 and the shoulder belt 62 can be interlocked.

Furthermore, in the above embodiment, the case where the spring member receiving space 84 is provided in the shoulder belt cover 66 to accommodate the protruding portion 71 of the spring member 70 has been described (Figs. 9, 10, 12A, 12B, 13A and Figure 13B). However, the present invention is not limited thereto. For example, the spring member receiving space 84 may be omitted in the shoulder strap outer cover 66 , and the same snap-on buckles as the snap-on buckles 85 and 86 may be added to a plurality of locations along the spring member receiving axis X84 . It suffices that the spring member 70 is provided with a snap-on buckle engaging body that engages with the snap-on snap buckle at a position corresponding to each snap-on snap buckle. In this case, by engaging the snap-and-lock engaging body of the spring member 70 with the snap-on buckle of the shoulder strap outer cover 66, the two can be interlocked.

Furthermore, in the above embodiment, the case where the backrest portion 12 is configured to be slidable in the up-and-down direction with respect to the backrest base portion 13 has been described (Figs. 3 and 4). However, the present invention is not limited to this. For example, the backrest portion 12 may be attached and detached from the backrest base portion 13 at a plurality of locations, or the backrest portion 12 may be fixed to the backrest base portion 13 (integrated). composition.

Furthermore, in the above-mentioned embodiment, the case where the child seat body 2 is configured in such a manner that the seat portion 11 and the backrest portion 12 can be easily separated and rejoined has been described (Fig. 3, etc.). However, the present invention is not limited to this. For example, the child seat body 2 may be configured to have an integrated structure in which the seat part 11 and the backrest part 12 are integrated.

In addition, the present invention is not limited to each of the above-described embodiments and other embodiments. That is, the applicable scope of the present invention includes an embodiment in which part or all of the above-mentioned embodiments are arbitrarily combined with any or all of the above-mentioned other embodiments, or an embodiment in which a part is extracted.

Furthermore, in the above-mentioned embodiment, the backrest displacement part 14 as the backrest support body, the belt insertion hole 41 as the insertion hole, the shoulder strap 62 as the belt, the spring member 70 as the elastic body, and the The shoulder belt cover 66 with the linking part constitutes a child seat as a child seat. The situation of seat 1 is described. However, the present invention is not limited to this, and a child seat may be composed of a backrest support body, an insertion hole, a belt, an elastic body, and a belt linking part having various other structures.

[Industrial availability]

The present invention can be used, for example, in child seats for automobiles.

12:Backrest

31B:Protective material

32N: Opposite part of the neck

33:Clamping mechanism department

41:With insertion hole

43: Spring component mounting hole

62L: Shoulder strap

66L: Shoulder strap cover

70:Spring component

C12: center line of backrest

X62: shoulder strap center line

X70: spring axis

X83: With insertion axis

X84: Spring component receiving axis

Claims (8)

A child seat, characterized by having: a backrest support body that supports the infant's back when the infant is seated; and an insertion hole provided in the backrest support body when the infant is seated. Near the shoulder of the infant, the backrest support body is penetrated; a belt is inserted into the insertion hole to restrain the infant's back to the backrest support body; and an elastic body is formed from the backrest support body. The vicinity of the above-mentioned insertion hole is protruding toward the side where the above-mentioned infant is seated and can be elastically deformed; and a belt linking part is provided so that the center line of the belt represents an imaginary center line along the length direction of the above-mentioned belt so as to be viewed from the above-mentioned infant. The belt is interlocked with the elastic body in a state in which the front side faces outward in the left-right direction and is tilted with respect to the axis of the elastic body representing an imaginary central axis along the longitudinal direction of the elastic body. The child seat of claim 1, wherein the backrest support body is separated from the insertion hole at the portion facing the neck of the infant when the infant is seated. On the opposite side, the above-mentioned elastic body is provided. The child seat of Claim 1, wherein the elastic body is disposed in a natural state such that the axis of the elastic body is oriented toward the center relative to the left-right direction based on the infant sitting on the seat. The child seat of Claim 1, wherein the cross-sectional shape of the elastic body protruding from the backrest support to the front side of the infant is generally circular or generally elliptical with the axis of the elastic body as the normal line. . The child seat according to claim 1, wherein the elastic body is configured to be attachable and detachable to the backrest support body. The child seat of Claim 1 further includes: a seat portion for the above-mentioned infant to sit, and a backrest base installed on the seat portion; the above-mentioned backrest support body is installed on the above-mentioned backrest base and is relative to the backrest base. The position of the backrest base can be changed. The child seat of claim 1, wherein the belt linking portion has: a belt insertion space for the belt to be inserted; and an elastic body storage space provided outside the belt insertion space to accommodate the elastic body. The child seat of Claim 7, wherein the belt linking portion positions the belt insertion space closer to the infant than the elastic body receiving space when the infant is restrained by the belt.