KR101166297B1 - Device For Controlling The Height Of A Pillow - Google Patents

Abstract

The present invention discloses a height adjustable pillow device.
The height adjusting pillow device of the present invention is a height adjusting pillow device that adjusts the height by adjusting the interval between the upper and lower plates arranged in an up-and-down direction, A pair of plate-like members, comprising: an upper guide plate having a first inclined hole formed on one side; A pair of plate members vertically and horizontally disposed on the upper surface of the lower plate so as to be overlapped on one side of the upper guide plate and having a second inclined hole symmetrical with the first inclined hole, and; And an elevating member having a guide shaft on both sides of which a slide shaft is slidably inserted into the first and second inclined holes in a threaded portion formed at one end by rotating under a rotational operation force.
According to the present invention configured as described above, since the height of the pillow can be adjusted according to the user's body shape and the preferred height by a simple operation, the user can easily use the pillow, So that there is an advantage that the occurrence of discomfort or injury can be prevented in advance. In addition, it is expected that the pillow will be prevented from tilting due to the user's turning over during sleeping, so that a comfortable sleeping can be attained through maintaining a stable posture, thereby enhancing the consumer's satisfaction with the product.

Description

{Device For Controlling The Height Of A Pillow}

The present invention relates to a height adjusting pillow device, and more particularly, to a pillow height adjusting device capable of arbitrarily adjusting the height of a pillow by a simple operation so as to improve ease of use and prevent a tilting or shaking To a height adjustable pillow device.

Generally, the shape and height of the pillow are very important for the physical characteristics of the sleeping person. Sleep postures take a considerable amount of time in the day's work, usually taking between 6 and 9 hours of sleep. As long as you stay asleep for a long time, keeping the right posture or keeping the right posture, the alignment of the human skeleton, the function of the internal organs, and the location of the nerve line and blood circulation are different.

Depending on the state of the pillow and the bed during sleep, all of the skeletal alignment of the body, nerves and blood circulation affect the skull (head) to the pelvic spine (neck, spine, back bone, tail bone) alignment , It affects the alignment of the ribs, scapula, shoulder bones, arms and arms, cuffs, fingers, femur, knee, calf, ankle, and toes of legs, resulting in differences in the comfort of the bed, It affects the position and condition of internal organs as well as affects blood circulation, sympathetic nerves, parasympathetic nerves, and autonomic nervous flow states, thus contributing to the health of the whole body of the body.

In other words, when the sleeping position is poor, the neck and shoulder of the sleeping person may be stressed, resulting in a problem of not only taking deep sleep but also causing headache and muscle pain.

Particularly, when a pillow that does not fit the user's body shape is used, it is not only inconvenient and comfortable to sleep, but also causes a pain caused by a bad posture.

However, since the conventional pillow is divided and sold according to the material, the size, and the height, the user's body condition or the height of the preferred pillow may not be satisfied.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a height adjusting pillow device capable of adjusting the height of a pillow by a simple operation of a user and thereby enhancing ease of use .

Another object of the present invention is to provide a height-adjustable pillow device capable of absorbing a shock caused by a user's carelessness by absorbing shock to prevent injury and preventing a tilting phenomenon due to backlash during sleep have.

According to an aspect of the present invention, there is provided a height adjusting pillow device for adjusting a height by adjusting a gap between upper and lower plates arranged in an up-and-down direction, A pair of plate-shaped members vertically provided parallel to each other with a space therebetween, the plate-shaped member having a first inclined hole formed on one side thereof; A pair of plate members vertically and horizontally disposed on the upper surface of the lower plate so as to be overlapped on one side of the upper guide plate and having a second inclined hole symmetrical with the first inclined hole, and; And an adjusting means for screwing an elevating member having a guide shaft into which the both sides are slidably inserted into the first and second inclined holes in a screw portion formed at one end by rotating under a rotational operation force.

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According to a preferred embodiment of the present invention, one of the upper and lower guide plates is provided with a vertical guide hole in the vertical direction, and the other guide plate is provided with an elevation guide shaft .

In another preferred aspect of the present invention, the pair of upper guide plates are connected and supported by a reinforcing plate having a groove formed therein so that the adjusting means can be disposed across the pair of upper guide plates, And the first and second inclined holes are formed on the respective corners of the upper and lower guide plates and are formed so as to cross each other in an 'X' shape.

In another preferred aspect of the present invention, the adjusting means includes a rotating friction member having a polygonal shape and integrally rotated at one end thereof; And a fixed friction member which is provided on one side of the rotating friction member and has an elastic plate portion which is in frictional contact with an edge portion when rotating the rotating friction member to inhibit the rotation.

In another preferred aspect of the present invention, the upper and lower plates are wrapped with a cover made of fabric, leather, and synthetic fabric, and the upper plate is provided with a pillow cushion on its upper surface.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

The height adjustment pillow device according to the present invention can adjust the height of the pillow by varying the height of the upper plate body according to the body shape or the preferred height of the user by a simple operation in which the user rotates the adjustment wheel in one direction or reverse direction, Not only the convenience can be enhanced, but also the impact force applied when the head comes into contact with the pillow is absorbed and buffered, thereby being able to prevent discomfort or injury from occurring.

In addition, it is expected that the pillow will be prevented from tilting due to the user's turning over during sleeping, so that a comfortable sleeping can be attained through maintaining a stable posture, thereby enhancing the consumer's satisfaction with the product.

1 is a perspective view illustrating a height adjusting pillow device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view for explaining the configuration of the height adjusting pillow device according to FIG. 2,
FIGS. 3 and 4 are views illustrating an internal structure of the height adjusting pillow device of FIG.
FIG. 5 is a perspective view illustrating an appearance of a height adjusting pillow device according to another embodiment of the present invention. FIG.
FIG. 6 is a perspective view showing a top plate of the height adjusting pillow device of FIG. 5,
FIG. 7 is an exploded perspective view for explaining the configuration of the height adjusting pillow device of FIG. 5,
FIGS. 8 and 9 are front views for explaining the operation of the height adjusting pillow device of FIG. 5;
10 and 11 are sectional views for explaining the operation of the height adjusting pillow device of FIG. 5;

Hereinafter, a height adjusting pillow device according to the present invention will be described with reference to the accompanying drawings.

First, it should be noted that the same components or parts among the drawings are denoted by the same reference numerals as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a perspective view illustrating a height adjusting pillow device according to the present invention, and FIG. 2 is an exploded perspective view illustrating a configuration of a height adjusting pillow device according to the present invention.

3 and 4 show an internal structure for explaining the operation of the height adjusting pillow device according to the present invention. Fig. 3 shows a state in which the pillow cushion 10 is raised, and Fig. 4 shows a state in which the pillow cushion 10 is lowered. As shown in FIG. 1, the height-adjustable pillow device according to the present invention includes upper and lower plates 11 and 13 as means for forming a frame with the outer body, and a hole A cover 12 and a pillow cushion 10 mounted on or coupled to the upper surface of the upper plate 11. [

In addition, as a means for adjusting the displacement in the vertical direction by being installed between the upper and lower valve bodies 11 and 13 and crossing with each other in an 'X' shape and receiving the operating force of the user, A left and right flow restricting plate 20 and a left and right flow restricting plate 40 arranged in the width direction when the lift control rod 20 is assumed to be the front longitudinal direction, And a control element 50 having one end connected to the elevation control rod 20 and the left and right flow prevention plate 40 to receive and transmit the operation force of the user.

Finally, the front and rear dampers 30a, 30b, 30c and 30d are provided with the elastic body 22 as a means for buffering and reducing the external force or the impact force applied in the vertical direction to the upper and lower plates 11, do.

The upper and lower plates 11, 13 are provided with plate-shaped members having a rectangular shape and are arranged at an upper and lower intervals. At this time, the upper plate 11 is provided with a pillow cushion 10 made of a material having a cushion on the upper surface thereof. The lower plate 13 forms a bottom plate, and a protrusion Or a non-slip member may be attached.

Four upper and lower dampers 30a and 30b and four rear dampers 30c and 30d are connected to four sides of the upper and lower valve bodies 11 and 13, respectively.

The lifting and lowering adjuster 20 is formed by crossing a pair of longitudinal members to each other in an 'X' shape and connecting the hinge 20h so as to be pivotable about mutually intersecting portions, The rail groove rs of the slot is formed to compensate the position when the vertical displacement occurs.

The upper and lower end portions of the lifting and lowering adjustable member 20 are hinged to a front damper 30a mounted on the upper plate 11 and a lower damper 13, The front damper 30b mounted on the front hanger 30 is hinged.

The elevation control rod 20 having such a structure can be displaced in the vertical direction about the hinge 20h.

The left and right flow-restricting plates 40 are disposed at right angles to the elevation control rod 20, that is, in the width direction, when the elevation control rod 20 is arranged in the longitudinal direction, This is an element that performs folding and unfolding operations.

The left and right flow restricting plate 40 includes an upper plate 41 formed of a plate-like member whose upper end is connected to a front-rear damper having one end connected to the upper plate 11, A lower plate 43 having a lower end connected to the front and rear damper combined with the lower plate 43 and a flow hinge 42 as a hinge element for connecting the upper plate 41 and the lower plate 43 in a foldable manner.

At this time, as shown in the figure, the left and right flow prevention plate 40 is formed with a through hole 40s at an intermediate portion, and the moving body 45 is provided in the through hole 40s. At this time, the movable body 45 is hinged to both sides of the left and right flow prevention plates 40 as shown in the enlarged view of FIG. 3 so that the left and right flow prevention plates 40 are not interfered with each other when folded or unfolded.

The moving body 45 is screwed to one end of a threaded portion 51 of the adjusting element 50 to be described later and is moved in the left and right horizontal direction along the threaded portion 51 by the forward and reverse rotational force applied to the adjusting element 50. [ So that the left and right flow prevention plates 40 are folded or unfolded on the basis of the flow hinge 42.

The adjusting element 50 receives the rotational operation force in the forward and reverse directions from the user and transmits the rotational operation force to the moving body 45 to finally apply the positional displacement to the left and right flow prevention plate 40 and the elevation control rod 20 A screw portion 51 which is arranged in a horizontal direction and on both sides of which a helical line is formed in the opposite direction on the basis of the intermediate portion and an adjusting wheel 53 which is coupled to both ends of the screw portion 51 and receives a rotational operation force from a user, . For example, the threaded portion 51 may form a left-hand thread on the left side and a left-hand thread on the right side.

When the user rotates the adjustment wheel 53 located at the left or right side in the unidirectional direction, the screw 51 coupled to the adjustment element 50 rotates integrally with the adjustment element 50.

Therefore, the moving body 45, which is screwed to both ends of the screw portion 51, is coupled to the respective flow prevention plates 40 and prevented from rotating. As a result, the moving body 45 moves to the left or right along the screw portion 51, The left and right flow plates are folded or unfolded so that the upper and lower valve bodies 11 and 13 connected to the left and right flow prevention plates 40 are separated or moved closer to each other.

In addition, the elevating and lowering adjuster 20 interlocks with the upper and lower valve bodies 11, 13 in accordance with the spacing or proximity movement of the upper and lower valve bodies 11, 13 to have positional displacements in the vertical and horizontal directions.

The adjusting element 50 is connected to the hinge 20h of the lifting and lowering adjuster 20 and has a through hole through which a middle portion of the screw 51 is inserted, 52). The support 52 should be provided so that the screw portion 51 does not hinder the rotation.

The front and rear dampers 30a, 30b, 30c and 30d are buffering elements for absorbing and reducing an external force or an impact force applied in the vertical direction. As in the case where the user strongly hits the head on the pillow cushion 10 for sleeping, It is an element for absorbing and buffering the external force or impact force appropriately so as to increase the bravery through proper buffering while suppressing the occurrence of safety accidents.

The front and rear dampers 30a, 30b, 30c and 30d are positioned on the front side with reference to the drawing and one end of the front and rear dampers 30a, 30b, 30c and 30d is connected to one side of the left- a rear damper 30a and 30b hinged to the rear damper 30 and hinged to the rear damper 30 and a front damper 30a and 30b hinged to the rear damper 30 and a rear damper 30a and 30b hinged to the rear damper 30, (30c, 30d).

The front and rear dampers 30a, 30b, 30c and 30d arranged as described above are provided with a contact portion 11 which is in the form of a plate material and which is in contact with the upper and lower plates 11 and 13, A receiving portion 33 having a space in which a coil spring-shaped elastic body 22 is received and a flexible portion 33 which is inserted into the receiving portion 33 and is resiliently protruded by an elastic supporting force of the elastic body 22 And a resilient fin 34 formed with a hinge hole (not shown) whose end portion is hingedly coupled to the lift control rod 20 together with the left and right flow prevention plate 40.

The operation of the height adjusting pillow device according to the present invention will now be described.

3 shows a state in which the upper plate 11 is raised, and an operation of lowering the height of the upper plate 11 in such a state will be described.

First, when the user is exposed to one side of the cover 12, or when the adjustment wheel 53 located inside the cover 12 is rotated in one direction, the threaded portion 51 is rotated in one direction in association with this.

Since the threaded portion 51 has threaded portions at both ends in different directions and the corresponding movable body 45 is fastened thereto, the movable body 45 is rotated by the rotation of the threaded portion 51, Direction.

At this time, the left and right flow prevention plate 40 coupled to the moving body 45 is folded as shown in FIG. 4 around the flow hinge 42 by the movement of the moving body 45, At the same time, the lifting and lowering adjuster 20 is lifted up and down by the upper and lower plates 11 and 13 through the damper during the lowering operation of the upper plate 11, So that it is displaced in a state in which it is rotated around the hinge 20h in cooperation with the descending operation.

Meanwhile, since the elevating control rod 20 is hinged to the damper and the left and right flow preventing plate 40 through the rail groove rs, the vertical displacement can be compensated.

The height of the upper plate 11 can be stably lowered only by a simple operation of rotating the adjusting wheel 53 in one direction and the height of the upper plate 11 can be lowered through the front dampers 30a and 30b and the rear dampers 30c and 30d Even if the head hits the head suddenly, the risk of a safety accident can be reduced by buffering the shock.

The left and right flow restricting plates 40 disposed on the left and right sides and the lift control rods 20 having an 'X' shape connecting the left and right flow restricting plates 40 are vertically It is possible to ensure a uniform supporting force against the applied load, and the inconvenience due to tilting can be solved.

FIG. 5 is a perspective view showing an outer appearance of a height adjusting pillow device according to another embodiment of the present invention, FIG. 6 is a perspective view of a top plate member separated to explain a configuration of the height adjusting pillow device of FIG. 5, 5 is an exploded perspective view for explaining the structure of the height adjusting pillow device.

FIGS. 8 to 11 are views for explaining the operation of the height adjusting pillow device of FIG. 5, wherein FIGS. 8 and 9 are front views as seen from the outside, and FIGS. 10 and 11 are sectional views.

As shown in the figure, the height adjusting pillow device according to the present invention is similar in basic structural features to the above-described embodiment. That is, according to the present embodiment, when the user rotates the operation wheel in one direction or reverse direction, the upper plate and the lower plate are moved away from or close to each other in association with the operation force, Which is similar to the described embodiment.

The height adjusting pillow device of the present embodiment is provided with an upper guide plate 60 and a lower guide plate 60 on the surfaces of the upper plate 11 on which the user's head is placed and the lower plate 13 placed on the floor, 80 which are respectively engaged with the upper guide plate 60 and the lower guide plate 80 by being screwed to the adjusting means 70 receiving the rotational operation force from the user and moving along the spiral, 75).

The upper and lower plates 11, 13 are formed of plate-like members having a rectangular shape and are arranged at an upper and lower intervals. The upper plate body 11 may be provided with a pillow cushion made of a material having a cushion on its upper surface, not shown, and the lower plate body 13 forms a bottom surface, A protrusion may be formed or a non-slip member may be attached.

The upper and lower plates 11 and 13 having such a configuration are vertically provided with a pair of upper guide plates 60 and a pair of lower guide plates 80 in the direction opposite to each other.

The upper guide plate (60) is a pair of plate members vertically provided parallel to each other at intervals on the lower surface of the upper plate body (11). The pair of phase guide plates 60 are provided in an inverted trapezoidal shape having both sides narrowed toward the lower guide plate 80 to be described later.

The upper guide plate 60 is formed on both sides with a first inclined hole 61 having an inclination angle so as to face the lower guide plate 80 side to be described later.

It is preferable that the pair of phase guide plates 60 are provided with a partition wall with a reinforcing plate 65 in order to increase the structural rigidity. At this time, the reinforcing plate 65 is provided at one end of the adjusting means 70 A groove 65h is formed so as to pass therethrough.

The lower guide plate 80 is a pair of plate members vertically provided in parallel to the upper surface of the lower plate member 13 with a gap therebetween. The pair of lower guide plates 80 support the upper guide plate 60 And is formed in a trapezoidal shape in which both sides are narrowed.

The lower guide plate 80 has second inclined holes 81 formed on both sides thereof facing the upper guide plate 60 and having an inclination angle toward the center. At this time, the first inclined hole 61 and the second inclined hole 81 are formed at an angle symmetrical to each other, and are crossed in an 'X' shape as shown in the figure.

The lower guide plate 80 is disposed to overlap with the upper guide plate 60. In the present invention, a pair of lower guide plates 80 are provided outside the pair of upper guide plates 60 As shown in FIG.

Meanwhile, in the present embodiment, it is proposed that the up-and-down guide plates 60 and 80 are additionally provided with elevation guiding means capable of stable up-and-down movement without occurrence of left-right flow when there is a displacement in the vertical direction.

The elevation guiding means is formed in an elevation guide hole formed in a direction perpendicular to any one of the guide plates of the upper and lower guide plates 60 and 80 and another guide plate, And an elevation guide shaft to be inserted.

In this embodiment, a vertical guide hole 63 is formed at one side of the upper guide plate 60 as shown in the figure, and the lower guide plate 80 corresponding to the elevation guide hole 63) of the lifting guide shaft (83). Here, the elevation guide shaft 83 may be provided as a screw member so as to be disassembled and assembled, and a nut member 83n may be fastened to an end portion through which the elevation guide hole 63 is inserted.

The lifting and guiding means having such a configuration can move the lifting and lowering guide shaft 83 only in the vertical direction along the lifting and guiding hole 63 and restrict the flow in the horizontal direction, The upper guide plate 60 and the lower guide plate 80 are prevented from moving in the horizontal direction.

The adjusting means 70 is a rotary element having a predetermined length which receives a forward or reverse rotational operation force from the user. The adjusting means 70 includes a screw portion 71 arranged in the horizontal direction and having a spiral at one end thereof, And a control wheel 73, which is a handle for receiving a rotational operation force from a user,

The adjusting means 70 is configured such that the elevating member 75 is screwed to the threaded portion 71. The elevating member 75 includes first inclined holes 61 disposed adjacent to each other on both sides thereof, And a guide shaft 76, which is integrally slidably inserted into the second inclined hole 81, is connected. Here, as shown in the drawing, the guide shaft 76 is preferably coupled to the elevating member 75 in a screw-fastening structure.

When the adjusting wheel 73 is rotated in the unidirectional direction by the adjusting means 70 having such a configuration, an acting force for moving the elevating member 75 screwed to the threaded portion 71 in one direction along the spiral is generated, The upper guide plate 60 and the lower guide plate 60 are transmitted to the first and second inclined holes 61 and 81 slidably coupled through the guide shaft 76, The plate 80 is displaced in the vertical direction.

On the other hand, in the present embodiment, braking means for preventing the screw portion of the adjusting means 70 from being rotated by the external force applied to the top plate body 11 by the user in the state where the height adjustment is completed is additionally provided Lt; / RTI >

The braking means includes a rotating friction member 78 having a polygonal shape and integrally rotated at one end of the adjusting means 70 and a rotating friction member 78 provided at one side of the rotating friction member 78, And a stationary friction member 77 having an elastic plate portion for restricting the rotation in frictional contact with the corner portion.

As shown in the drawing, the stationary friction member 77 has a through hole (not shown) through which one end of the adjusting means 70 is inserted. The fixed friction member 77 has one side connected to a lift groove 65s And an elastic plate portion (not shown), which is bent perpendicularly to one side thereof and is in frictional contact with an edge portion of the rotary friction material 78, is integrally formed.

In the braking means of this configuration, when the rotation wheel 78, which is integrally coupled to one end of the adjusting means 70, is rotated when the adjusting wheel 73 rotates, each corner portion is frictionally contacted to one side of the stationary friction member 77 The external force applied to the upper plate 11 is transmitted to the lifting member 75 and the adjusting means 70 through the first and second inclined holes 61 and 81. In this case, The frictional force between the rotating friction member 78 and the stationary friction member 77 is smaller than the frictional force between the rotating friction member 78 and the stationary friction member 77. As a result, the adjustment means 70 is prevented from rotating due to an external force acting on the upper plate member 11.

The operation of the height adjustable pillow device according to this embodiment will be described as follows.

9 and 11 show a state in which the upper plate 11 is lowered. When the upper plate 11 is moved up and down, Describe the operation of lowering the height in the state.

First, when the user rotates the adjustment wheel 73 in one direction, as the screw portion 71 rotates in one direction, the elevating member 75 screwed thereto is moved in one direction.

Since the guide shaft 76 provided on both sides of the elevation member 75 is slidably inserted into the first inclined hole 61 and the second inclined hole 81 adjacent to each other, A force is applied to move along the first inclined hole 61 and the second inclined hole 81 to cause the upper plate 11 to move downward as shown in Figs.

On the contrary, when the adjustment wheel 73 is rotated in the reverse direction, the screw portion 71 rotates in the reverse direction, so that the elevating member 75 screwed thereto is moved in the reverse direction. At this time, as the guide shaft 76 provided on the elevating member 75 is acted on the other side along the first inclined hole 61 and the second inclined hole 81, as a result, The upper plate body 11 is moved upward.

The height adjusting pillow device according to this embodiment includes the upper guide plate 60 and the lower guide plate 80 and the elevating and lowering guide plates 60 and 80 for vertically connecting the upper and lower guide plates 60 and 80 It is possible to secure a uniform supporting force with respect to the load applied in the vertical direction as a whole through the member (75).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

Description of the Related Art
10: pillow cushion 20:
30a, 30b, 30c, 30d: damper 40: flow prevention plate
50, 70: regulating element 60: upper guide plate
80: Lower guide plate

Claims (9)

delete delete delete delete A height-adjustable pillow device for adjusting the height by adjusting an interval between upper and lower plates (11, 13)
A pair of plate members vertically provided parallel to each other at intervals on the lower surface of the upper plate body 11, the upper plate 60 having a first inclined hole 61 formed on one side thereof;
A pair of plate members vertically arranged parallel to and spaced apart from the upper surface of the lower plate body 13 and arranged so as to overlap one side of the upper guide plate 60, A lower guide plate 80 on which two inclined holes 81 are formed;
The elevating member 75 having the screw shaft 71 formed at one end thereof with the rotating operation force and having the guide shaft 76 slidably inserted into the first and second inclined holes 61 and 81 at both ends thereof is screwed, (70);
Wherein the height adjustment pillow device comprises:
The elevator according to claim 5, wherein one of the upper and lower guide plates (60, 80) is formed with a vertical guide hole in a vertical direction, and the other guide plate is slidably inserted into the vertical guide hole And a lifting / lowering guide shaft is provided.
6. The apparatus according to claim 5, wherein the pair of upper guide plates (60) are connected and supported by a reinforcing plate (65) having a groove formed therein so that the adjusting means (70) The first and second inclined holes 61 and 81 are formed at the respective corner sides of the upper and lower guide plates 60 and 80, , And 'X' shaped to be crossed with each other.
6. The apparatus according to claim 5, wherein the adjusting means (70) comprises a rotating friction member (78) having a polygonal shape and integrally rotated at one end thereof;
A fixed friction member (77) provided at one side of the rotating friction member (78) and having an elastic plate portion for restricting rotation by frictionally contacting an edge portion when the rotating friction member (78) is rotated;
The height adjustment pillow device comprising:
6. The washing machine according to claim 5, wherein the upper and lower plates (11, 13) are wrapped by a cover made of any one of fabric, leather and synthetic fabric, or the upper plate has a pillow cushion Wherein the height adjusting pillow device comprises:

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