KR101814504B1 - Baby Walker - Google Patents

Abstract

A child walker according to the present invention includes: a lower frame surrounding an outside of a hollow region having a predetermined length and width; A plurality of caster wheels formed at points protruding outward from the hollow region at the front left, right, and rear left and right outer ends of the lower frame; And a control unit.
According to the present invention, since the caster wheel is further protruded to the outer portion of the lower frame, stability of the center of gravity is improved, and a plurality of stopper assemblies are mounted. As the caster wheel is protruded outwardly, When the at least one caster wheel is separated from the ground due to a stepped surface such as a step in progress to the side not only at the front and rear sides but also at the front and rear sides, the bottom surface of the stopper assembly abuts against the ground surface Prevents further progress by rubbing and stably prevents accidents that are overturned or fallen.

Description

{Baby Walker}

According to the present invention, since a plurality of caster wheels are formed at a position where the caster wheel is further projected from the base frame of the lower frame to the outside, the engagement of the stopper can be performed more smoothly and the stabilization of the center of gravity and the downsizing of the lower frame The present invention also relates to a child walker having enhanced rollover prevention function, wherein safety for preventing overturning is effectively enhanced.

The walker is for the infant's walking practice, and it is a mechanism that makes it easy to move by putting a wheel on the lower part in general. In order to minimize the possibility that the center of gravity of the walker is shifted due to the inclination of the ground, the running speed of the walker, the sudden change of direction, etc., the walker is relatively freely moved by the wheels. The size of the lower frame should be greater than a certain level, and for the sake of safety only, the larger the size of the lower frame, the better. However, in general, considering that the place where the walker is used is indoors, the larger the size of the lower frame, the lower the usability.

Also, if there is a staircase or a threshold in the traveling direction of the walker, there is a possibility that the walker will be overturned or fall down. If a walker is used on the ground where the slope is formed, the traveling speed may accelerate to a certain level or more.

In order to solve the above problem, European Patent No. 0875185 discloses a safety device for preventing rollover or falling when a walker goes beyond a threshold or enters a stairway. However, it has been described that the caster wheel known in the preceding document is moved only in the forward or backward direction, but does not proceed in the lateral direction, and the safety device can also prevent the safety accident that may occur in the forward or rearward movement of the infant walker .

In the Korean Registered Utility Model Application No. 1993-0002591 '' Fall prevention device for a child walker '', a through hole having a protrusion is formed on a protrusion formed on a frame of a known child walker, and a fixing shaft of the stopper is inserted into the through hole with interference, And a stopper is formed on the bottom surface of the frame in the detailed description and drawings.

However, the stopper of the above-mentioned prior art has a problem that the bottom surface area of the stopper that can provide the frictional force due to abutting against the bottom surface is too small to prevent the travel of the go-around and the physical configuration for engagement between the stopper and the frame is relatively poor If an external force of more than the level is applied, there is a possibility that the fixed shaft can easily be deformed or broken. In addition, the distance between the wheel and the stopper is too wide to allow the walker to reach the danger zone until the stopper and the bottom surface are in contact with each other after the wheel moves away from the stepped surface in the vertical or horizontal direction. There is a possibility of overturning due to the center shift.

Therefore, by designing the position of the wheel based on the structural characteristic of the baby walker, in which the risk of rollover greatly depends on the distance between the wheels and the stopper, safety is maximized to effectively prevent overturning in the lateral direction as well as before and after, It is necessary to develop a child walker that has an improved rollover prevention function that provides a structure that can increase the stability of the center of gravity while forming a relatively small frame size.

European Publication No. 0875185 (November 4, 1998) Korean Registered Utility Model 1993-0002591 (1993.05.17) Japanese Patent Application Publication No. 3002924 (July 27, 1994) Korean Unexamined Patent Publication No. 2003-0031853 (Mar. 23, 2003)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to design a position of a wheel based on the structural characteristic of a child walker in which the risk of rollover greatly depends on the distance between a wheel and a stopper, The main object of the present invention is to effectively prevent overturning in the lateral direction.

It is another object of the present invention to provide a structure which can enhance the stability of the center of gravity while forming a relatively small size of the lower frame.

According to an aspect of the present invention, there is provided a child walker comprising: a lower frame surrounding an outer portion of a hollow region having a predetermined length and width; A plurality of caster wheels formed at points protruding from the front left and right rear left and right outer ends of the lower frame to the outside of the hollow area; And a control unit.

Further, the lower frame further includes an enlarged projection protruding outward from the hollow region at the front left and right and rear left and right outer ends and covering the open lower portion, and the caster wheel includes a lower portion And the lower frame is supported from the ground.

In addition, the lower frame is characterized by having an elliptical shape elongated in front and back as a basic frame.

In addition, the infant walker may further include a plurality of stopper assemblies extending from a lower side of the lower frame to a lower height than the caster wheel.

In addition, the plurality of stopper assemblies may form an inner group formed at a lower portion of the lower frame and at a portion close to the hollow region, and an outer group formed at a lower peripheral portion of the lower frame and the hollow region. do.

In addition, the inner side group and the outer side group are formed as a pair by arranging them on opposite sides of the long axis or the short axis of the lower frame.

In addition, the lower frame may further include an inwardly projecting portion projecting from the inner wall side toward the hollow region, wherein the inner group extends at a lower level than the caster wheel at the lower portion of the inwardly projecting portion.

In addition, the stopper assembly is formed to be inclined so that the heights of the one side end and the other side end are different from each other.

In the child walker according to the present invention,

1) The caster wheel is further protruded to the outer side portion of the lower frame to improve the stability of the center of gravity,

2) Since a plurality of stopper assemblies are mounted, the stopper assembly is disposed further inside than the imaginary line formed by the caster wheel as the caster wheel is protruded outward, The lower surface of the stopper assembly abuts against the ground surface and rubs against the ground surface, thereby preventing further progress, thereby stably preventing an accident that is overturned or falls down.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to provide a further understanding of the technical idea of the present invention. And shall not be construed as limited to the matters described.
1 is a perspective view showing a child walker according to the present invention.
2 is a side view of a side view of a child walker according to the present invention.
FIG. 3A is a bottom view showing an embodiment of the stopper assembly of the present invention. FIG.
FIG. 3B is a bottom view showing another embodiment of the stopper assembly of the present invention. FIG.
3C is a bottom view showing another embodiment of the stopper assembly of the present invention.
4 is a bottom perspective view showing an enlarged portion of a lower frame in a state where the stopper assembly is not engaged;
5 is a perspective view showing a configuration of a stopper assembly according to the present invention.
6 is a side view showing another embodiment of the stopper assembly according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

The child walker 1 basically includes an upper seating portion 10, a support frame 20, a lower frame 30, and a caster wheel 40. Characteristically, (50).

First, the upper seating portion 10 is composed of a seating means 12 for accommodating an infant and an upper frame 11. The upper seating portion 10 is located at an upper position relative to the lower frame 30 and is located at a height such that the leg of the infant accommodated in the seating means 12 can touch the floor surface. The upper frame 11 may further include a music or play apparatus for providing entertainment.

The lower frame 30 is formed to have a diameter larger than that of the upper frame 11 and to surround the outer periphery of the foot area of the infant, that is, the hollow area having a predetermined length and width. And is supported from the bottom surface by attaching the formed caster wheel 40 to the bottom surface. The lower frame 30 is rigidly connected to and supported by the upper seating part 10 by the supporting frame 20. The supporting frame 20 includes two supporting frames 20 for enhancing durability It is preferable to connect and support the upper frame 11 and the lower frame 30 in a crossing manner, that is, in a cross shape.

The material and shape of the upper frame 11, the lower frame 30 and the support frame 20 can be freely adopted within a range not departing from the technical idea of the present invention.

In the present invention, the overall shape of the lower frame 30 is formed to be an ellipse or a rectangle, and the caster wheel 40 is fixed at a position where the caster wheel 40 protrudes outward from the hollow frame 30, The stopper assembly 50 is provided at a lower portion of the lower frame 30 to prevent the child walker 1 from being rolled up or falling when the child walker 1 travels on a step or an inclined surface. And the stopper assembly 50 has the effect of being disposed inward from the imaginary line connecting the caster wheel 40, with the stability of the center of gravity and ease of application to the running practice of the infant, Avoid overturning efficiently. In order to further enhance interlockability, the shape and function of the lower frame 30 have been conventionally modified and applied, and will be described in detail below.

The lower frame 30 is a frame surrounding the hollow region, and may be formed in various shapes such as a square shape and a circular shape. In this case, the hollow region may be shaped to have a narrow width and a long shape, or to have a long axis 30L and a short axis 30W, respectively. That is, the front and rear side lengths may be formed to be longer than the left and right side widths, and may be formed in an elliptical shape as shown in the figure for enhancing esthetics and safety. This is because the foot of the infant who rides in the walker 1 moves forward and backward with respect to the infant's boarding position so that the front and rear side lengths must be formed to be longer than a certain level in order to protect the foot of the infant, The width direction of the walker 1 should be relatively narrow in order to allow the traveling path in the house to run as efficiently as possible. In other words, it is most effective to form the frame in a narrow and long shape in consideration of the suitability of the infant on the walker 1 and its surrounding environment, that is, the ease of walking practice, the driving efficiency and stability, The position and shape of the stopper assembly 50 of the present invention should be designed based on the shape of the stopper assembly 30.

The caster wheel 40 according to the present invention connected to the lower frame 30 may be formed to have the same shape as the base frame of the lower frame 30 in order to further enhance the stability of the center of gravity And is formed on the outer side as a reference.

In this case, the number and position of the plurality of caster wheels 40 attached to the lower part of the lower frame 30 may be variously changed. However, as shown in the figure, In the case of the present invention.

The caster wheel 40 is a wheel capable of advancing in all directions and is formed at a position protruding from the left and right rear ends of the lower frame 30 to the outside of the hollow area, It is possible to further increase the distance between the four vertexes and the center point, thereby improving the stability. At this time, it is possible to attach a separate support to the caster wheel 40 so as to extend further outward from the outer side of the lower frame 30. In order to ensure more stable durability, An extension protrusion 30a may be additionally provided which is a separate configuration for guiding the attachment position of the caster wheel 40. [

The extended projections 30a are formed on the outer side of the hollow region so as to cover the point where the caster wheel 40 is formed, that is, at the outermost ends of the front left and right and rear right and left sides of the base frame of the lower frame 30 And is formed so as to cover a portion where the caster wheel 40 is connected, that is, a lower portion, as shown in the figure. In other words, the caster wheel 40 is housed in the inner lower part in a dome-like shape in a state where the caster wheel 40 is accommodated, thereby preventing unnecessary stimulation applied to the caster wheel 40 from the outside, The possibility of a safety accident can be further reduced. The caster wheel 40 is engaged with the lower portion of the extended protrusion 30a to support the lower frame 30 from the ground.

The stopper assembly 50 is formed to extend from a lower side of the lower frame 30 to a height lower than the caster wheel 40. The stopper assembly 50 is provided with a plurality of stopper assemblies 50 for covering the front, To prevent the fall. The stopper assembly 50 is provided with a positional feature that allows the stopper assembly 50 to more reliably prevent rollover in accordance with the shape of the lower frame 30 and a structural feature for more effectively engaging the lower frame 30 Hereinafter, this will be described in more detail.

The stopper assembly 50 is brought into close contact with the bottom surface of the walker 1 when the walker 1 moves to a position where the stepped step or the like exists so that at least one caster wheel 40 is separated from the ground by the step, So that the walker 1 is no longer moved to the step side. The stopper assembly 50 is provided at a lower portion of the lower frame 30 so that the movement of the caster wheel 40 can be stably controlled even if the caster wheel 40 is detached from the plurality of caster wheels 40. [ It is preferable that a plurality of the electrodes are formed.

In this case, the plurality of stopper assemblies 50 can be grouped into the outer group 50A and the inner group 50B.

The outer group 50A is formed along the hollow region and the peripheral portion at the lower portion of the lower frame 30. The outer group 50A includes the front and rear rollover preventing parts 50A (1) and the left and right rolling bar preventing parts 50A (2) .

The front and rear rollover prevention part 50A (1) prevents the rollover and fall of the walker 1 when the walker 1 moves toward a step located forward or backward (short side direction) And is formed at a position adjacent to the respective caster wheels 40 at the lower portions of the left and right sides (i.e., both sides in the longitudinal direction) of the lower frame 30 as shown in the figure, The stopper assemblies 50 respectively formed at the lower side and the lower side of the right side are preferably formed in pairs at positions facing each other with respect to the longitudinal axis (long axis 30L) so as to provide frictional force with the bottom surface.

That is, the front and rear rollover preventing part 50A (1) includes a total of four stopper assemblies 50, and each stopper assembly 50 is arranged to be symmetrical with respect to the long axis 30L and the short axis 30W, respectively. More specifically, the front and rear rollover preventing part 50A (1) includes a pair of caster wheels 40 disposed at a rearward position or a rearward side of a pair of caster wheels 40 disposed on the front side, That is, two pairs, respectively, at a front point slightly distant from the floor surface, so that the caster wheel 40 is brought into contact with the floor surface immediately after being detached from the floor as it progresses forward or backward.

When the walker 1 moves toward the stairs located on the left or right side (the long-side axis direction) with respect to the boarding posture of the infant, the left and right overturning prevention parts 50A (2) And is formed at a position near the caster wheel 40 side under the front and rear sides (i.e., both sides in the width direction, short side) of the lower frame 30 and is provided at the front and rear rollover prevention parts 50A (1 ), The stopper assemblies 50 formed at the lower left side and lower right side respectively are formed at a position facing each other with respect to the width direction axis (short axis 30W) And a pair of caster wheels 40 disposed on the left or right side of the lower frame 30, respectively.

At this time, the present applicant has repeatedly found that when the outer group 50A is applied to the elliptical lower frame 30 having a longer length than the width, the left and right roundabout preventing parts 50A (2) It is confirmed that the performance of stopping the traveling of the walker 1 in an emergency is relatively low compared to the part 50A (1). In other words, rollover accidents can be prevented in almost all cases when going to the front and rear sides, but there is a possibility that the risk of overturning due to the movement of the center of gravity due to the infant ' In the case of the infant walker (1), since the safety enhancement should be considered as the first priority for the infant who is physically weak and the walking is not smooth, Applicant repeatedly experimented with various changes in configuration.

As a result, it was confirmed that the rollover prevention ratio was greatly improved when the inner group 50B including the stopper assembly 50 arranged in the hollow region side was additionally included.

The inner side group 50B is disposed inwardly of the lower frame 30 in the lower side of the lower frame 30 in the lower side of the outer side group 50A, will be. In other words, as shown in the figure, the inner group 50B is formed to be inserted into the lower frame 30 as compared with a reference circumferential line connecting a plurality of stopper assemblies 50 of the outer group 50A, The stopper assembly 50 of the present invention is configured such that the stopper assembly 50 of the stopper assembly 50 of the present embodiment is configured so as to control the traveling of the walker 1 as soon as possible after the caster wheel 40 is disengaged, And may be formed at a position slightly spaced inwardly of the base 30.

Most preferably, the inner group 50B may be formed to project from the inner peripheral side wall of the lower frame 30, i.e., the inner side wall, toward the hollow region of the lower frame 30. [ In other words, when the lower frame 30 is realized as a rectangular shape, the lower frame 30 is formed at an inner position further into the hollow region with reference to an imaginary line connecting the vertex portions of the inner periphery, For practice, it is formed at the position which has entered the hollow region as far as it does not interfere with the walking area, which is the part that receives the moving foot and legs. At this time, the rollover is effectively prevented as the position of the inner group 50B is closer to the walking area, and as the distance from the hollow area of the lower frame 30 is lower, the possibility of interfering with the foot of the infant is small. The inner group 50B is arranged in the hollow region to the maximum extent so as not to interfere with the walking area provided for the infant ' s walking practice. It is most preferable that the actual position is 20 to 30 CM from the center of the lower frame 30 toward the long side. For this purpose, the shape of the lower frame 30 must also be deformed, which will be described later.

As shown in the figure, the inner side group 50B can be formed as one pair each on one side long side and the other side long side, and a formed position is a center part of the lower side with respect to the long side of the lower frame 30, And the rear side portion (that is, the end portion of the short shaft 30W, the portion near the front caster wheel 40 and the portion near the rear side caster wheel 40). In another embodiment, the inner group 50B may be formed by two or more pairs of stopper assemblies 50 on the right and left sides of the long axis 30L of the lower frame 30. [

At this time, the lower frame 30 may further include an inwardly projecting portion 30b so that the stopper assembly 50 can be more stably fixed at a characteristic position where the inner group 50B is formed .

The inwardly protruding portion 30b is formed at a position where the inner group 50B is formed and protrudes toward the hollow portion on the inner peripheral side wall of the lower frame 30, Of the stopper assembly 50 of the outer group 50A can be engaged under the same coupling condition as the stopper assembly 50 of the outer group 50A. In other words, the stopper assembly 50 of the inner group 50B may be coupled to the inner wall of the lower frame 30 in the lateral direction. In this case, the direction of the pressure applied by the friction with the ground surface, The stopper assembly 50 and the lower frame 30 can be applied in the same direction so that the engagement state can not be stably maintained. As a result, the combination of the lower frame 30 and the stopper assembly 50 Direction is preferably formed in the longitudinal direction. However, since the inner group 50B should be formed at a position deviating from the position of the basic frame of the conventional lower frame 30, the inner frame 50B must be provided with the inwardly projecting portion 30b.

The lower frame 30 and the caster wheel 40 and the stopper assembly 50 described above are basically formed by a virtual line connecting the caster wheel 40 to the outer group 50A basically according to the positional characteristics of the caster wheel 40 And has an effect of being arranged in the side of the hollow region by comparison. As a result, when the caster wheel 40 is detached from the surface beyond the stepped surface of the step, the stopper assembly 50 acts to abut against the ground so that the overturning can be prevented more stably, and furthermore, By providing the inner side group 50B in addition, it has an effect of preventing rollover accident from occurring in almost all cases.

In order to further ensure a stable coupling force between the lower frame 30 and the stopper assembly 50, the lower frame 30 may have a separate coupling means. That is, a plurality of stopper assemblies 50 are formed along the lower surface of the lower frame 30. To this end, the lower frame 30 basically includes a receiving hole 31 and a frame partition wall 32, Will be described in detail with reference to the drawings. First, the lower frame 30 surrounds the outside of a hollow region having a predetermined length and width as described above. In order to achieve light weight and economical efficiency, the lower frame 30 generally opens when the interior is empty.

The receiving hole 31 is formed as a bar having a hollow inside and projecting downward from one side of the lower frame 30, i.e., one side of the upper side of the inner space. The stopper assembly 50 is formed in the hollow of the receiving hole 31 by inserting the insertion support bar 52 of the stopper assembly 50 to be described later. So that it can be fixed to the lower frame 30 in a fitting manner.

The frame partition wall 32 connects the both sides of the receiving hole 31 with the inner side wall of the lower frame 30 so that the receiving hole 31 is located on the center side of the lower frame 30 And moreover, it functions to adjust the depth of insertion when the insertion support bar 52 to be described later is engaged with the receiving hole 31 by abutting against the stopper partition wall 53 to be described later.

A plurality of the receiving holes and the frame partitions 32 are formed in the lower frame 30 as a set structure so that stable engagement with the stopper assembly 50 will be described later.

The stopper assembly 50 is basically shorter than the caster wheel 40 at a lower one side of the lower frame 30, that is, at a specific position defined by the outer group 50A and the inner group 50B. The lower surface of the stopper assembly 50 is spaced apart from the ground surface by a predetermined distance on the basis of the state where the caster wheel 40 is landed on the ground surface, and the body 51, the stopper partition wall 53, ).

The body 51 is an outer case having a predetermined height so as to determine the height of the stopper assembly 50. As shown in the figure, the bottom surface of the body 51 is rectangular, And the lower surface is formed of a material having a high friction coefficient, preferably rubber, so as to be brought into close contact with the ground to provide frictional force, thereby providing a frictional surface. The overall outer shape can be modified into various shapes such as a shape in which the side is rounded so as to be more efficiently applied to the rectangular frame 30, the elliptical shape and the elliptical lower frame 30, To be flat. At this time, the body 51 may be formed so that a portion facing the hollow portion of the lower frame 30, that is, a portion facing the point where the infant ' s feet are disposed may be rounded as a whole (in this case, Thus, it has an effect of preventing a problem such as a wound on the infant's foot when the infant collides with the infant's foot during walking practice.

In addition, the body 51 may be formed so as to have a lower height near the caster wheel 40, or in an opposite direction as needed, or to be inclined with respect to the inner and outer sides of the lower frame 30 .

The lower surface of the body 51 is inclined with respect to the ground surface so that the walker 1 enters the stepped portion such as a step so that the caster wheel 40 is separated from the ground, The caster wheel 40 can be brought into close contact with the ground surface stepwise from the lower surface of the body 51 to a portion far from the lower surface of the caster wheel 40 when the lower surface of the caster wheel 40 comes into close contact with the ground surface, In the case where a separate protruding member such as a non-slip member is formed on a stair step, which is a step in the inner step of the building, is provided to compensate the equilibrium state of the tilted walker 1 due to the deviation of the wheel 40, And the height difference between the ground and the ground. In this case, the inclination angle should be set at a relatively small angle, that is, about 5 to 10 degrees, so that the walker 1 should not be severely tilted in a state in which it is completely in close contact. Of course. In addition, the lower surface of the body 51 may be formed in a stepwise manner for the purpose and effect described above.

The insertion support bar 52 protrudes upward from the bottom surface of the body 51, that is, from the bottom surface of the internal space of the body 51. At least one . As shown in the figure, when the body 51 is formed to be narrow and long so as to have a short side and a long side, the body 51 may be formed along the long side direction of the central portion. . The insertion support bar 52 is tightly fitted and fixed to the receiving hole 31 formed in the lower frame 30 so that the body 51 can be kept fixed to the lower frame 30. [

The stopper partition wall 53 is a rectangular plate member which connects the both sides of the insertion support bar 52 with both side walls of the body 51 as shown in the figure, When the insertion support bar 52 and the receiving hole 31 of the lower frame 30 are fitted to each other, when the insertion support bar 52 is inserted into the receiving hole 31 of the lower frame 30, Can be used to determine the depth.

As described above, the construction and operation of the walker for a child according to the present invention are described in the above description and drawings. However, the present invention is not limited to the above description and drawings, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

1: walker
10: upper seat portion
11: Upper frame
12: Seating means
20: Support frame
30: Lower frame
30L: Long axis
30W: Shortening
30a: extended protrusion
30b: inward protrusion
31: receiving hole
32: Frame barrier
40: Caster wheel
50: Stopper assembly
50A: outer group
50A (1): front and rear rollover prevention part
50A (2): left and right room rollover prevention part
50B: Inner group
51: Body
51a: friction surface
52: Insertion support rod
53: stopper barrier

Claims (8)

A lower frame surrounding the outside of the hollow region having a predetermined length and width;
A plurality of caster wheels formed at points protruding outward from the hollow region at the front left, right, and rear left and right outer ends of the lower frame;
And a plurality of stopper assemblies extending from a lower side of the lower frame to a lower height than the caster wheel,
Wherein the plurality of stopper assemblies include:
An inner side group formed at a lower portion of the lower frame and a lower side outer group formed at a lower peripheral portion of the lower frame and the hollow region. The method according to claim 1,
Wherein the lower frame comprises:
Further comprising an enlarged projection protruding outwardly of the hollow region at the front left and right and rear left and right outer ends and covering the opened lower portion in a rounded manner,
The caster wheel
And the lower frame is engaged with a lower portion of the extended projection to support the lower frame from the ground. The method according to claim 1,
Wherein the lower frame comprises:
Characterized in that the elliptical shape elongated in the forward and backward directions is used as a basic frame. delete delete The method according to claim 1,
The inner group and the outer group are,
Wherein the upper and lower frames are arranged in pairs at positions facing each other with respect to a long axis or a minor axis of the lower frame. The method according to claim 1,
Wherein the lower frame comprises:
Further comprising an inwardly projecting portion projecting from the inner wall side toward the hollow region,
The inner group comprises:
And extends at a lower level than the caster wheel at a lower portion of the inwardly projecting portion. The method according to claim 1,
The stopper assembly includes:
Wherein the first and second end portions are inclined so that heights of the one side end and the other side end are different from each other.

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