JP3171971U - All-encompassing lightweight infant safety chair - Google Patents

Abstract

The present invention provides an infant safety chair of an all-enclosed lightweight type that is easy to control in manufacture, easy to assemble, and realizes weight reduction. An all-enclosed lightweight child safety chair includes a main body (or a buffer) formed by a foam expansion material and a side surface around the main body. The main body is divided into an inner end surface and an outer end surface, the first hard layer 10 covers the inner end surface of the main body, and the second hard layer 20 covers the outer end surface of the main body. As a result, the expanded foam material (or the main body), the first hard layer and the second hard layer are intimately and firmly compounded. This reduces the overall weight while maintaining the strength of the safety chair, and facilitates portable use. [Selection] Figure 1

Description

  The present invention relates to an infant safety chair structure that is entirely encased or integrally foamed, and in particular, a structure such as a rubber outer shell or a hard layer is designed on the inner and outer end surfaces of the foam cushioning material. The present invention relates to an infant safety chair of an all-encompassing lightweight type by a technical means for integrally molding a shell or a hard layer.

  Infant safety chairs that use soft type cushions such as polystyrene (Polystyrene), urethane (Urethane), or foam materials combined with hard foams, hard bottoms, etc. are designed to reduce the impact on babies and toddlers from danger. It is a well-known technique to protect. For example, US Pat. No. 7,726,734 B2 of Patent Document 1 “Infant Chair with Elastic Side Impact Protection (Juvenile Seating With Resilient Side Impact Protection)”, US Pat. No. 5,615,927 of “Patent Document 2” “Seat Chair” "For Child-care Implementation", U.S. Pat. No. 5,385,385, "Child's Automotive Safety Seat With A View", U.S. Pat.

  The challenge of creating a safety chair for babies is to achieve the strength and vibration absorption or cushioning effect of the safety chair structure, but baby chairs made of foam cushioning (or expansion) material are usually thick The manufacturing work is relatively troublesome. For example, as disclosed in a technique using a three-layer foam material in US Pat. No. 5,615,927 of Patent Document 2 and a safety chair having a thick seat portion in US Pat. No. 5,385,385 of Patent Document 3.

  In order to remedy the above-mentioned drawbacks, the prior art has already disclosed means applying a combination of foam cushioning materials or a hard base (or plastic shell). However, in these embodiments, since the foam cushioning material is exposed on the outer surface (in use), there is a drawback that the foam cushioning material is easily damaged.

  In order to reduce the situation as described above, there is an embodiment in which a soft pad member is combined with the outer surface of the foam cushioning material. However, according to a person skilled in the art, the manufacturing cost is relatively increased, and the combination work is troublesome. Increase. In addition, since the weight of the safety chair cannot be reduced, it becomes a burden in the process of portable use on the user side, greatly affecting the practicality, and these situations are not what we want.

Although the above reference materials primarily show techniques for designing infant safety chairs, it is understood that they are still not ideal in the design and manufacture of safety chair structures. If the structure of the safety chair is reconsidered, it is different from the conventional one by making the structure more robust and light and different from the known technique, and changing its manufacturing and processing form. In practice, the drawbacks existing in the prior art are improved, but these problems include the following points.
(1) Foam cushioning (or expansion) material so that the safety chair is not too heavy or too large in volume so that it is not inconvenient to carry or carry under the condition that it has sufficient anti-impact strength (or cushioning action). The thickness of the safety chair constituted by or the whole body should not be too thick.
(2) The production cost and assembly cost of the safety chair can be reduced only by minimizing the assembly work of the soft pad or related components and the safety chair under the condition of providing comfort. In particular, it is clear that the use of a large number of members delays the production efficiency of the safety chair, so that a significant improvement can be made.
(3) The safety chair or body made of foam cushioning material should be ideally protected. In particular, the situation of damage during use must be minimized as much as possible, and only in this way can the vibration absorption or cushioning action given to the foam cushioning material be minimized.

  In other words, solving the non-ideal situation in the prior art and the above considerations if a means for integrally molding the safety chair can be provided and it can be provided with a structure that completely wraps the foam cushioning material. This means is not yet disclosed in the aforementioned patent proposal and is not found in the market.

US Pat. No. 7,726,734 B2 US Pat. No. 5,615,927 US Pat. No. 5,385,385

  The main purpose of the present invention is to provide an all-encompassing lightweight infant safety chair that improves problems such as difficulty in manufacturing control, troublesome wearing, and inability to effectively lower weight in the known technology. There is to do.

  It includes a first hard layer, a second hard layer, and a main body (or buffer) encased between the first hard layer and the second hard layer. The body is formed of a foam expansion material and has a buffering action. The main body is divided into an inner end surface, an outer end surface, and a side surface formed around the main body. The first hard layer covers the inner end surface of the main body, and the second hard layer covers the outer end surface of the main body. The foam cushioning material (or the main body), the first hard layer, and the second hard layer are combined in a close state, which is a heavy weight of a known safety chair and improves disadvantages such as inconvenience for carrying.

  Based on the all-encompassing lightweight infant safety chair of the present invention, guide grooves are arranged in the first hard layer and / or the main body and / or the second hard layer to enhance the pressure resistance and loading strength of the safety chair or the main body. To do. In addition, a plurality of air holes are arranged on the guide groove paths of the first hard layer and / or the main body and / or the second hard layer to enhance the air permeability when a baby or an infant is placed on the safety chair.

  Actually, the guide groove and the air hole form a path and a mechanism for promoting air flow and exclusion. In other words, the main body, the first hard layer, and the second hard layer are both disposed in one mold, and in the operation of performing integral molding by heating, the air in the mold is a foam cushion (or expansion) material. After flowing along the guide groove, the air is discharged from the air hole.

  The height of the side surface formed in the peripheral area of the main body is at least equal to one third of the width of the main body based on the fully-wrapped lightweight child safety chair of the present invention. As a result, a protective action is built on the side surface, and the side surface wraps the baby or infant on the body.

  The first hard layer is provided with an upper surface and a lower surface, and at least one side bone portion is formed on the lower surface based on the fully-wrapped lightweight infant safety chair of the present invention. A weight member is attached to the side bone, and the main body and the first hard layer are both placed in the mold and heated to perform integral molding. In addition, a more stable bonding state is created in the first hard layer, and the structural strength of the first hard layer and the main body is increased.

The fully-wrapped lightweight child safety chair of the present invention has the following effects.
(1) The structure of the safety chair 100 is newly designed, and is different from a known structure. In addition, since the manufacturing and processing forms are also improved, it differs from the known art. For example, in the safety chair 100, the first hard layer 10, the second hard layer 20, the first hard layer 10 and the second hard layer 20 are covered together or integrally molded, and a foam cushioning (or vibration absorbing material) is formed. And a main body 30 formed by combining the two.
(2) The main body 30 has a structure in which two hard layers are joined (that is, the main body 30 is covered with the first hard layer 10 and the second hard layer 20), and sufficient anti-impact strength (or buffering). The thickness of the safety chair 100 or the main body 30 constituted by the foam cushioning material can be made to be thinner than that of the known technology. Therefore, in the known technology, the thickness, weight, and volume of the safety chair are excessively increased to provide sufficient strength, and the situation where carrying and carrying are inconvenient is remarkably improved.
(3) A structure form in which the first hard layer 10 and the second hard layer 20 cover the main body 30, and a soft pad or related member applying rubber to the edge portion 104 is directly fitted to provide comfort. Under the conditions, the assembly work of the safety chair 100 is minimized as much as possible. At the same time, in the prior art, a soft pad is sewed with a plastic hook, and the form in which the soft pad is fixed on a safety chair is improved.
(4) The means for integrally foam-molding the first hard layer 10, the second hard layer 20, and the main body 30 in the mold minimizes the manufacturing cost and assembly cost of the safety chair as compared with the known technology. Can do. In particular, the use of a large number of members is a significant improvement because it clearly hinders the production efficiency and quality of the safety chair.
(5) The structure form in which the first hard layer 10 and the second hard layer 20 cover the main body 30 ideally protects the safety chair 100 or the entire main body 30 constituted by the foamed expansion material from a known technique. In particular, during use, damage to the main body 30 covered with the first hard layer 10 and the second hard layer 20 is minimized as much as possible, and the influence of the damage on the vibration-absorbing action and the buffering action of the foam expansion material. Minimize.
(6) The main body 30 is a structure that is covered with the first hard layer 10 and the second hard layer 20 or is integrally foam-molded, and provides a technique for completely covering the foam cushioning material. Minimize the state of the prior art where there are many joints and gaps in the safety chair, and dirt is likely to adhere. In addition, the structure in which the main body 30 is completely covered by the first hard layer 10 and the second hard layer 20 is convenient for performing cleaning or cleaning.
(7) The structural form in which the first hard layer 10 and the second hard layer 20 cover the main body 30 applies various types of face materials (for example, cloth, rubber) by applying an acceptable printing, adhesion, co-extrusion method, etc. Etc.) or by combining the designs, the hierarchical action and design effect of the safety chair 100 are enhanced.
(8) Even when the safety chair 100 unexpectedly falls into the water, a part of the water enters the safety chair 100 by the plurality of air holes 45 installed in the safety chair 100, so the safety chair 100 balances and does not capsize, ensuring the safety of the rider.

It is the figure which showed the external appearance of the safety chair of this invention. A broken line portion in the figure is a handle combined with a safety chair. It is the exploded view which showed the 1st hard layer in the structure of this invention, the 2nd hard layer, and the main body. It is sectional drawing (1) which showed the combined state of the fixing | fixed part of the 1st hard layer in the structure of this invention, and the fitting part of a main body. In the structure of this invention, it is sectional drawing (2) which showed the state which wrapped the main body with the 1st hard layer and the 2nd hard layer. In the structure of this invention, it is sectional drawing (3) which showed the whole formed by combining a weight member with a 1st hard layer, and couple | bonding with a main body. In the structure of this invention, it is sectional drawing (4) which showed the whole formed by combining a weight member with the protrusion part of a 1st hard layer, and couple | bonding with a main body.

  The fully-wrapped lightweight child safety chair of the present invention in FIGS. The safety chair 100 includes a first hard layer 10, a second hard layer 20, and a main body (or buffer portion) 30 that is wrapped between the first hard layer 10 and the second hard layer 20. In the embodiment of the present invention, a plastic outer shell is preferably selected for the first hard layer 10 and the second hard layer 20. The main body 30 is made of a foam cushioning (vibration absorbing material) and has a cushioning action. For example, EPS, EPO, EPP, EPU, or similar materials are used.

  In principle, the safety chair 100 is provided with a backrest section 101 and a seating section 102 based on the position of the person to be put on the safety chair 100, and the side surface 103 is provided on both sides or the periphery (area) of the safety chair 100 (or the main body 30). And edge portions 104 are formed. The side surface 103 is for protecting a person who is placed in a safety chair 100 such as a baby or an infant.

  The broken line part of FIG. 1 shows the pivot part 106 arrange | positioned in 103 places of the side surface of the safety chair 100 in order to pivot the handle 60, and it is in a rotatable state.

  FIG. 2 particularly shows that the main body 30 is divided into an inner end face 31 and an outer end face 32. The first hard layer 10 covers the inner end surface 31 of the main body, and the second hard layer 20 covers the outer end surface 32 of the main body. The foam cushioning material (or the main body 30), the first hard layer 10 and the second hard layer 20 are in a tightly coupled state, which is heavy in a known safety chair and improves disadvantages such as inconvenience for carrying.

  In the above embodiment, the edge portion 104 of the safety chair 100 is configured to wrap around the edge portion 104 of the main body 30 connected by the edge portion 104 of the first hard layer 10 (and / or the second hard layer 20). Thus, the edge portion 104 also provides the function of fixing the soft pad with rubber.

  In the embodiment shown in FIG. 2, the guide groove 40 is disposed at least in the first hard layer 10 and / or the main body 30 and / or the second hard layer 20, and the anti-pressure and loading strength of the safety chair 100 (or the main body 30). To strengthen. In addition, a plurality of air holes 45 are arranged on the path of the guide groove 40 of the first hard layer 10 and / or the main body 30 and / or the second hard layer 20, and a baby or an infant is placed on the safety chair 100. Increase breathability.

  In practice, the guide groove 40 and the air hole 45 establish a path and mechanism for promoting air flow and exclusion. In other words, the main body 30, the first hard layer 10, and the second hard layer 20 are both placed in one mold (not shown), and in the operation of performing integral molding by heating, the air in the mold is foamed. After flowing along the guide groove 40 by the action of the buffer (or expansion) material, it is discharged from the air hole 45. In addition, between the main body 30 and the first hard layer 10 and the second hard layer 20, the foam material is directly foamed in the first hard layer 10 and the second hard layer 20 to form the main body 30, and the composite 30 is combined. Make up one whole.

  In the embodiment to be adopted, the guide groove 40 disposed on the safety chair 100 (or the main body 30 or the first hard layer 10 or the second hard layer 20) is a plurality of thin and shallow grooves, and a part thereof is parallel and intersecting. A form combining a Y-shape and an X-shape is formed and extended to the side surface 103 area.

  In the developed embodiment, the first hard layer 10 and the second hard layer 20 are combined with the main body 30 by an adhesive method to constitute one whole.

  In one preferred embodiment, if a lateral reference axis χ is defined for the safety chair 100 and the lateral reference axis χ is a reference reference line, the height of the side surface 103 formed in the peripheral area of the safety chair 100 (or the main body 30). The height is at least equal to one third of the width of the safety chair 100 (or the main body 30). As a result, a protective action is built on the side surface 103, and the side surface 103 functions to wrap the baby or infant riding on the safety chair 100 (or the main body 30).

  As shown in FIGS. 2, 3, and 4, the first hard layer 10 (or the second hard layer 20) is provided with an upper surface 11 (or 21) and a lower surface 12 (or 22). A plurality of fixing portions 13 (or 23) are arranged on the lower surface 12 (or the upper surface 21 of the second hard layer 20), and a plurality of fixing portions 13 (or 23) are provided on the main body 30 corresponding to the fixing portions 13 (or 23). The fitting part 33 is formed. Accordingly, when the first hard layer 10 (or the second hard layer 20) and the main body 30 are combined or combined, the fixing portion 13 (or 23) is combined and fixed to the fitting portion 33, and the first hard layer is fixed. 10 (or the second hard layer 20) and the main body 30 are fixed in a fixed state.

  In the embodiment to be adopted, since the fixing portion 13 (or 23) is in the form of a convex portion or a rivet, the fitting portion 33 of the main body 30 is in a depressed shape, or the main body 30 is expanded and expanded in a mold. When this is done, the foam material of the main body 30 covers the fixing portion 13 (or 23), and the form of the fitting portion 33 is formed correspondingly. In the embodiment, the fixing portion 13 (or 23) and the fitting portion 33 are arranged in the backrest section 101 of the safety chair, but they can be arranged in the seat section 102 or the side section 103 area.

  In the embodiment to be developed, the fixing part 13 (or 23) can be in a recessed form. On the other hand, the fitting part 33 of the main body 30 can also be made into a convex part or a rivet form.

  In order to enhance the ventilation effect when a person is placed on the safety chair 100, the ventilation hole 105 is disposed in the backrest area 102 of the safety chair 100. In a possible embodiment, the vent holes 105 of the first hard layer 10 and / or the second hard layer 20 are shaped like column holes, thereby covering the vent holes 105 formed on the main body 30. Moreover, the fixing effect and stability which couple | bond the 1st hard layer 10, the 2nd hard layer 20, and the main body 30 by this covering form are also improved.

  As shown in FIG. 5, in the developed embodiment, at least one side bone portion 14 is formed on the lower surface 12 of the first hard layer 10 (or the upper surface 21 of the second hard layer 20). In order to combine the weight member 50 with the side bone portion 14, the main body 30 and the first hard layer 10 (and / or the second hard layer 20) are both placed in a mold and heated to perform integral molding. In the process of forming the main body 30 by foaming and expanding the foam cushioning material, the main body 30 and the weight member 50 are not only tightly coupled, but the internal pressure naturally formed by the foam expansion is further utilized to further utilize the weight member 50. And the first hard layer 10 produce a very favorable bonding force, and a more stable bonding state is created between the main body 30 and the first hard layer 10, and at the same time, the first hard layer 10 and the second hard layer 10 20. Increase the strength of the entire structure after the main body 30 is joined. In the embodiment to be adopted, the weight member 50 has a shape like π.

  FIG. 6 shows an embodiment in which the weight member 50 is combined with the guide groove 40. The guide groove 40 is formed on the upper surface 11 of the first hard layer 10, and a side bone or a protrusion 40 ′ is formed in the direction of the lower surface 12 of the guide groove 40 relative to the first hard layer 10 (or the guide groove). A side bone or a protrusion is formed on the upper surface 21 of the second hard layer 20 corresponding to 40), and the weight member 50 is combined on the side bone or the protrusion 40 ′. Accordingly, the foam cushioning material (or the main body 30) is helped to be rivet-bonded, the main body 30 and the first hard layer 10 (or the second hard layer 20) are stably bonded, and the first hard layer 10 (or the first hard layer 10) The structural strength of the two hard layers 20) and the main body 30 can be increased. In the embodiment to be adopted, the weight member 50 can be formed in a U shape.

  The point to be explained here is that the weight member 50 and the side bone portion 14 (or the protruding portion 40 ′) are first combined, and then the foam cushioning material is heated and expanded to be molded. In the foam cushioning material, a pressing force (or pressure) due to expansion is generated, entangled with the weight member 50 and the side bone portion 14 (or the protruding portion 40 ′), and the foam cushioning material (or the main body 30) and the first hard material. A stable bonding state is generated in the layer 10 (or the second hard layer 20). Further, the overall structural strength of the first hard layer 10 (or the second hard layer 20) and the main body 30 is increased, and the thickness of the main body 30 can be reduced as much as possible. It is possible to minimize the weight. In addition, since the structure form or material of the weight member 50 to be coupled is changed or adjusted, the structure of the safety chair 100 can be adjusted to meet different conditions of use according to different structural strength requirements. .

  The fully-wrapped lightweight child safety chair of the present invention has the following conditions and advantages as compared with the prior art.

(1) The structure of the safety chair 100 is newly designed, and is different from a known structure. In addition, since the manufacturing and processing forms are also improved, it differs from the known art. For example, the safety chair 100 is covered with the first hard layer 10, the second hard layer 20, the first hard layer 10 and the second hard layer 20, or a foam cushioning (or vibration absorbing) material is integrally formed. And a main body 30 formed by combining them.
(2) The main body 30 has a structure in which two hard layers are joined (that is, the main body 30 is covered with the first hard layer 10 and the second hard layer 20), and sufficient anti-impact strength (or buffering). The thickness of the safety chair 100 or the main body 30 constituted by the foam cushioning material can be made to be thinner than that of the known technology. Therefore, in the known technology, the thickness, weight, and volume of the safety chair are excessively increased to provide sufficient strength, and the situation where carrying and carrying are inconvenient is remarkably improved.
(3) A structure form in which the first hard layer 10 and the second hard layer 20 cover the main body 30, and a soft pad or related member applying rubber to the edge portion 104 is directly fitted to provide comfort. Under the conditions, the assembly work of the safety chair 100 is minimized as much as possible. At the same time, in the prior art, a soft pad is sewed with a plastic hook, and the form in which the soft pad is fixed on a safety chair is improved.
(4) The means for integrally foam-molding the first hard layer 10, the second hard layer 20, and the main body 30 in the mold minimizes the manufacturing cost and assembly cost of the safety chair as compared with the known technology. Can do. In particular, the use of a large number of members is a significant improvement because it clearly hinders the production efficiency and quality of the safety chair.
(5) The structure form in which the first hard layer 10 and the second hard layer 20 cover the main body 30 ideally protects the safety chair 100 or the entire main body 30 constituted by the foamed expansion material from a known technique. In particular, during use, damage to the main body 30 covered with the first hard layer 10 and the second hard layer 20 is minimized as much as possible, and the influence of the damage on the vibration-absorbing action and the buffering action of the foam expansion material. Minimize.
(6) The main body 30 is a structure that is covered with the first hard layer 10 and the second hard layer 20 or is integrally foam-molded, and provides a technique for completely covering the foam cushioning material. Minimize the state of the prior art where there are many joints and gaps in the safety chair, and dirt is likely to adhere. In addition, the structure in which the main body 30 is completely covered by the first hard layer 10 and the second hard layer 20 is convenient for performing cleaning or cleaning.
(7) The structural form in which the first hard layer 10 and the second hard layer 20 cover the main body 30 applies various types of face materials (for example, cloth, rubber) by applying an acceptable printing, adhesion, co-extrusion method, etc. Etc.) or by combining the designs, the hierarchical action and design effect of the safety chair 100 are enhanced.
(8) Even when the safety chair 100 unexpectedly falls into the water, a part of the water enters the safety chair 100 by the plurality of air holes 45 installed in the safety chair 100, so the safety chair 100 balances and does not capsize, ensuring the safety of the rider.

  The fully-enclosed lightweight infant safety chair provided with the above-mentioned effects provided by the present invention is more ideal in structure and components than the known technology, and has the advantages that cannot be compared with the functions unprecedented in the prior art. , Showing great inventive step.

  However, what has been described above is disclosure of the embodiments of the present invention, and does not limit the scope of the present invention, and all equivalent changes and modifications made based on the scope of the utility model registration request, It is clearly stated here that it is included in the scope of the registration request of the present invention.

DESCRIPTION OF SYMBOLS 10 1st hard layer 11, 21 Upper surface 12, 22 Lower surface 13, 23 Fixing part 14 Side bone part 20 2nd hard layer 30 Main body 31 Inner end surface 32 Outer end surface 40 Guide groove 40 'Protrusion part 45 Air hole 50 Weight member 60 Handle 100 Safety chair 101 Backrest section 102 Stool section 103 Side surface 104 Edge portion 105 Ventilation hole 106 Pivoting part χ Lateral reference axis

Claims (24)

In a fully-enclosed lightweight infant safety chair that defines a backrest, a stool, and a lateral reference axis,
Each side of the safety chair forms a side with a height of at least one third of the width of the safety chair,
A first hard layer comprising an upper surface and a lower surface;
A second hard layer comprising an upper surface and a lower surface;
Comprising a body completely covered between the first hard layer and the second hard layer and formed by a foam material having an inner end surface and an outer end surface;
The first hard layer covers the inner end surface of the main body, the second hard layer covers the outer end surface of the main body, and the main body, the first hard layer, and the second hard layer are combined to constitute the whole. An all-encompassing lightweight infant safety chair characterized by   The infant safety chair according to claim 1, wherein an edge portion is formed in a peripheral area of the safety chair.   The entire covering light weight according to claim 2, wherein the edge portion of the safety chair covers and covers the edge portion of the main body where the edge portions of the first hard layer and the second hard layer are connected. Type infant safety chair.   The all-enclosed lightweight infant safety chair according to claim 1, wherein a guide groove is disposed in at least one of the first hard layer, the second hard layer, and the main body.   The all-encompassing lightweight infant safety chair according to claim 4, wherein at least one air hole is disposed on a path of the guide groove.   5. The guide groove is arranged in a plurality of elongated and shallow grooves, and a combination form of Y-shape and X-shape is formed as a configuration method in which a part of the guide grooves is parallel and intersecting, and the guide grooves are extended to a side area. All-enclosed lightweight infant safety chair as described in 1.   The main body, the first hard layer and the second hard layer are directly foamed in the first hard layer and the second hard layer using a foam material, and the main body, the first hard layer and the second hard layer are formed. 4. The all-encompassing lightweight infant safety chair according to claim 1 or 3, wherein the whole is combined to form a whole.   4. The all-enclosed lightweight infant safety chair according to claim 1, wherein the first hard layer and the second hard layer and the main body are adhesively bonded to form a whole.   The fully-wrapped lightweight infant safety chair according to claim 1, wherein a pivoting portion for pivotally attaching a handle is disposed on a side surface portion of the safety chair to form a rotatable shape.   The all-enclosed lightweight type according to claim 1, wherein the lower surface of the first hard layer is provided with a plurality of fixing portions, and a plurality of fitting portions are formed on the main body facing the fixing portions. Infant safety chair.   The all-enclosed lightweight type according to claim 1, wherein the upper surface of the second hard layer is provided with a plurality of fixing portions, and a plurality of fitting portions are formed on the main body facing the fixing portions. Infant safety chair.   The all-enclosed lightweight infant safety chair according to claim 10 or 11, wherein the fixing portion and the fitting portion have a convex shape and a concave shape.   The fully-encased lightweight infant safety chair according to claim 12, wherein the fixing portion and the fitting portion are arranged in a backrest section of the safety chair.   The fully-wrapped lightweight infant safety chair according to claim 1, wherein ventilation holes are provided in a backrest area of the safety chair.   The infant-type child-wrapped lightweight safety type according to claim 14, wherein ventilation holes are disposed in the first hard layer and / or the second hard layer and the main body, and the ventilation holes have a columnar hole shape. Chair.   The all-enclosed lightweight infant safety chair according to claim 1 or 3, wherein at least one side bone portion is formed in at least one of the first hard layer and the second hard layer.   17. The all-enveloping lightweight infant safety chair according to claim 16, wherein a weight member is combined and attached to the side bone portion.   The infant weight safety chair of claim 17, wherein the weight member has a π shape.   The all-enclosed lightweight infant safety chair according to claim 12, wherein the fixing portion and the fitting portion are arranged in a stool section of the safety chair.   The infant safety chair according to claim 12, wherein the fixing portion and the fitting portion are arranged on a side surface of the safety chair.   5. The fully enveloping lightweight infant safety according to claim 4, wherein the guide groove is formed on an upper surface of the first hard layer, and a protrusion is formed on a lower surface opposite to the guide groove. Chair.   5. The all-enclosed lightweight infant safety chair according to claim 4, wherein a protrusion is formed at a location corresponding to the guide groove on the upper surface of the second hard layer.   23. The fully-encased lightweight infant safety chair according to claim 21 or 22, wherein a weight member is combined with the protruding portion.   The full weight light weight infant safety chair according to claim 23, wherein the weight member has a shape close to a U-shape.

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