KR100738392B1 - The device for adjusting the height of a chair or a desk - Google Patents

Abstract

The present invention relates to an apparatus for adjusting the height of a book and a stool.

Book and stool height adjustment device of the present invention, the lower end and the upper end are respectively coupled to the bottom member (M _L ) and the plate member (M _U ) of the book and hung, respectively, one inner height adjustment hole (H ') and a plurality of An outer height adjusting hole (H) of the vertical frame (11) consisting of inner and outer frames (11B) and (11A) inserted into and coupled to each other; A lever 12 rotatably coupled to the upper side wall of the inner frame 11B; An unlocking bar 13 having one side rotatably coupled to an inner surface of the side wall of the inner frame 11B and having an upper portion contacting a lower end of the lever 12; The structural feature of the present invention is composed of a locking member 14 coupled to an inner surface of the rear side wall of the inner frame 11B and operated by the unlocking bar 13 serving as a lever. There is this.

The height adjustment device of the book and the stool of the present invention can adjust the height of the book and the stool with a small force, and even in the case of a desk, the height can be adjusted with only one user's power.

Desk, stool, elevator

Description

The device for adjusting the height of a chair or a desk}

1 is a perspective view of a desk coupled to the height adjustment device of an embodiment of the present invention.

Figure 2 is a cross-sectional structural view showing a fixed state of the height adjustment device on an embodiment of the present invention a bookcase.

Figure 3 is a cross-sectional structure showing a height adjustment step of the height adjustment device of an embodiment of the present invention a bookshelf.

Figure 4 is an exploded perspective view of the height adjustment device of an embodiment of the present invention a bookcase.

Figure 5 is a cross-sectional structural view showing a fixed state of the height adjustment device according to another embodiment of the present invention.

Figure 6 is a cross-sectional structure showing a height adjustment step of the height adjustment device according to another embodiment of the present invention.

Figure 7 is a cross-sectional structure showing a state in which the inner frame of the height adjustment device according to another embodiment of the present invention is caught on the stopper and not separated to the outside of the outer frame.

         ((Explanation of symbols for main parts of drawing))

11. Vertical Frame 11A. Outer frame 11A1. Guide rod

11A2. Buffer spring 11B. Inner frame 11B1. Bottom plate

11B2. Spring Insertion Tube 11B3. Guide roller 12. lever

12A. Connection rod 12B. Handle 12C. Swing arm

13. Unlocking bar 14. Locking member 14A. housing

14B. Locking Rod 14C. Locking Spring 15. Height Adjustment

E. Locking means E '. Separation prevention protrusion H. Outside height adjusting hole

H '. Inner height adjusting hole H ". Stopper coupling hole M _L. Bottom member

M _U. Plate member S. Stopper

The present invention relates to an apparatus for adjusting the height of a book and a stool, and more particularly, the inside of the inner frame of a pair of inner and outer frames that are coupled to each other to support the book and the stool and slidably slide along the up and down directions. One side of the middle part in the longitudinal direction is rotatably coupled, and an unlocking bar, which is rotated in an opposite direction from the upper and lower parts of the engaging part, and reciprocally movable in the horizontal direction by the lower end of the unlocking bar. It consists of a locking member with a locking rod and a lever for rotating the upper portion of the unlocking bar, and a plurality of formed in the upper and lower rows in the outer frame through the unlocking bar that moves on the principle of the lever by this lever Easily and conveniently the locking rod is caught in any one of the catching hole of the height of the entire vertical frame, that is, the length of the up and down direction It is related with the height adjusting device of a book and a stool which can freely adjust.

Various tables and desks (hereinafter referred to as "desks") generally have a fixed height structure, and a stool is either a fixed height structure or a height adjustable structure. In the case of all fixed structures, considerable inconvenience may be caused depending on the height of the user.

However, even when using a desk with a fixed height and a height-adjustable stool, only the height of the stool can be adjusted, and still some inconvenience is inevitable.

That is, it is most desirable to be able to adjust the height of both the desk and the bench according to the user's physical condition, but for most desks and benches, only the height of the bench can be adjusted, in particular, the correct posture, Not only unfavorable for children and adolescents in the growing season, unlike the height-adjustable stool, there is a problem that the fixed height of the desk caused the economic burden to change periodically as the user's height increases.

Therefore, it is necessary to be able to adjust the height in the case of a desk as well as a stool, but unlike a stool capable of supporting a seat plate with only one vertical frame with respect to the floor. In the case of the desk, since the vertical frame is required on each side of the top plate, that is, at least one pair of vertical frames are combined, it is not easy to combine the height adjusting device. It is not easy to adjust.

In addition, in the case of a stool, a height adjusting device mainly used in recent years is a semi-automatic device using a pneumatic cylinder, and is adjusted to a specific height when a load (weight of the user) is not applied to the seat due to aging according to the use period. There is a disadvantage that the length of the pneumatic cylinder, which has been made, is itself long.

In other words, the inconvenience of having to adjust the height of the stool whenever sitting on the stool.

Moreover, in the case of the cylindrical height adjusting device, the cylinder is extended to the maximum length side by moving the lever, and in order to adjust the height, the user needs to press the cylinder with a certain amount of force, that is, the weight. There is a problem in that you can not adjust the height of the stool on its own, it is convenient compared to the following manual height adjustment device, but the disadvantage is relatively expensive.

And, in the simplest form of height adjustment device, one side is inserted into the hollow of the other side of the two vertical frame of the outer frame, through the outer frame, the front end of the adjustment is in close contact with the outer surface of the inner frame A device in which a knob is screwed together may be mentioned.

The height adjustment device combined with the adjustment knob as described above, by adjusting the height of the entire vertical frame in a manner to adjust the insertion depth of the inner frame by rotating the control knob firmly in close contact with the outer end surface of the inner vertical frame. In order to fix the inner vertical frame, this apparatus is rarely used in recent years because of the inconvenience of unscrewing and tightening the adjusting knob every time the height of the stool is adjusted.

As described above, in the case of a stool, the seat plate on which a person sits is supported by a vertical frame coupled in the form of a bone or a bone, so that various types of height adjustment devices are coupled regardless of the structure of the height device. In the case of a desk, the top plate is supported by a vertical frame joined in at least two bones or in the form of two bones parallel to each other, where the height adjustment device must be coupled to each of the two vertical frames, the height of each of the two vertical frames being raised and lowered. Since the adjusting device is combined, the following problems arise.

When the cylinder height adjuster is coupled to a desk, the operating levers of the two cylinders can be moved with both hands, and the cylinder will increase in length, but at this time, the length of the cylinder will increase because it cannot apply force to the top plate of the desk. The length reduced by compression, that is, the height of the desk cannot be adjusted.

In other words, in order to adjust the height of a desk combined with a cylindrical height adjusting device, one user must sit at the desk and adjust the height while pressing the desk with his or her weight, or the two people work together to adjust the height. There is discomfort,

And, when the height adjustment device of the adjustment knob method is combined, the two adjustment knobs respectively coupled to the vertical frame on both sides while unwinding the adjustment knobs on both sides, adjusting the height of the desk and keeping the height of the top plate unchanged. It is very difficult to adjust the height of the desk with only one person's force because it must be tightened at the same time.

The present invention was devised to solve all the problems of the above-described height adjustment politics for books and benches, and can be applied to both desks and stools, but the production cost is relatively low compared to the cylindrical type, and the production cost is reduced. An object of the present invention is to provide a book-and-stool height adjusting device that can be made possible, and can easily adjust the height of a desk with only one's own power.

The above object of the present invention is achieved by a lever structure in which both sides are pivotable in opposite directions with respect to a coupling part on one side in the middle of the longitudinal direction.

The book-and-stool height adjusting device of the present invention includes a pair of rectangular pipe-type vertical frames which are inserted and coupled to be reciprocally slidable with each other;

An unlocking bar coupled to an inner surface of the inner frame of the two vertical frames in an up and down direction, and a locking member coupled to an inner bottom surface of the inner frame;

It consists of a lever coupled to the upper outer surface of the inner frame, and when the movement of the lever is transmitted to the locking member through the unlocking bar, the rear end of the locking rod constituting the locking member and penetrating the two vertical frames inside the inner frame of the vertical frame By retreating to the side, the inner frame is moved up and down with respect to the outer frame, so that the length of the entire vertical frame, that is, the height of a desk or a stool can be adjusted.

That is, the book and stool height adjusting device of the present invention is free to adjust the length of the vertical frame, that is, the insertion depth of the inner frame with respect to the outer frame in a state where the lever is pulled by hand, and then simply release the lever to make the entire vertical frame. Since the length is simply fixed, even in a desk where the height adjusting device of the present invention is coupled to both sides, one person can easily adjust the height by using both hands, constituting the device of the present invention. The components are as follows.

In order to avoid confusion in terminology before description, the following definitions are made.

The vertical frame is formed vertically with respect to the floor in a state in which the inner and outer frames of the square pipe shape are inserted and coupled, each frame is composed of two pairs of sidewalls parallel to each other, a reference to a person using a desk Thus, the outer side faces the front side of the person as "front side wall", the rear side wall of the person "rear side wall", and the side wall facing the left and right direction of a person is called "side side wall".

The vertical frame serves to connect a plate member such as a top plate of a desk or a seat plate of a desk and a bottom member such as a support frame or a support plate placed on the floor in the up and down direction. A square pipe-shaped outer frame having a plurality of outer height adjusting holes penetrated in a vertical direction along a rear side wall, the lower end being coupled thereto;

The upper end is fixedly coupled to the plate-like member, the lower end is movable up and down reciprocating slidingly in the state inserted into the hollow inside of the outer frame through the upper end of the outer frame, one inner height adjustment hole in the lower end of the rear side wall It consists of an inner frame formed through.

That is, the vertical frame serves as a support column connecting the plate member and the support frame, and the overall length can be adjusted by the sliding insert structure of the inner and outer two frames.

The unlocking bar is a shape of a bar or a rod that is relatively longer in length than the width or thickness and is coupled to the inner surface of the inner frame in an up and down direction, the middle one of which is an inner surface of one side wall of one side wall of the inner frame. It is rotatably coupled to the structure, and through this coupling portion, the upper and lower portions can be reciprocated at the same time in a direction opposite to each other, that is, the structure can be operated in the form of the movement of the lever.

At this time, it is preferable to position the position of the engaging portion of the unlocking bar coupled to the inner surface of the inner frame closer to the lower portion than the upper portion, since the user's force is the first portion is applied to the upper portion.

In other words, the longer the length between the upper end and the coupling portion, the shorter the length between the coupling portion and the lower portion, whereby a greater force can be exerted with a smaller force, the position of the coupling portion closer to the lower portion than the upper portion It is good to let.

However, placing the coupling part too close to the lower end has the advantage that a larger force can be obtained with a smaller force, while the moving distance of the upper end becomes too short as the moving distance of the upper end becomes too long, and accordingly, Since the reciprocating distance of the locking rod reciprocated by the lower end is also shortened, the position of the engaging portion of the unlocking bar should be determined in consideration of the reciprocating distance required for the locking rod.

The locking member is fixed to the entire length of the vertical frame, that is, the height of the book and the stool by penetrating the inner and outer frames together while being coupled to the lower end of the inner side of the rear side wall of the inner frame. A housing having a rear end fixedly coupled to an inner surface of the rear side wall adjacent to the edge;

The rear end of the housing can be inserted into the outer height adjusting hole through the rear end of the housing and the inner height adjusting hole while being reciprocally coupled inside the housing, and the front end of the housing passes through the front end of the housing. A locking rod protruding into the inner frame;

It consists of a locking spring interposed between the rear outer circumferential surface of the locking rod and the inner end of the front end of the housing, the outer end of the front end of the locking rod protruding into the inner frame through the front end of the housing has a locking means such as a projection to unlock The bottom of the bar must be hooked up.

Through the structure as described above, the rear end portion of the locking rod is formed through the inner height adjusting hole formed through the lower side of the rear side wall of the inner frame, and formed a plurality of outer side through the column formed up and down along the rear side wall of the outer frame By being elastically fixed by the elastic force of the locking spring in the state of passing through any one of the height adjustment hole, the entire length of the vertical frame is stably maintained.

At this time, the outer height adjustment hole is formed through the rear side wall of the outer frame is exposed to the outside, when the locking rod is inserted into the outer height adjustment hole to be seen from the outside, the aesthetics of the vertical frame can be hindered, of the outer frame Instead of penetrating a plurality of outer height adjustment holes in the rear side wall, a plurality of outer height adjustment holes are made in a row to make a separate height adjustment piece formed at a predetermined interval, and then fixedly coupled to the inner surface of the rear side wall of the outer frame, By allowing the locking rod to be inserted into the outer height adjusting hole of the adjusting piece, deterioration of the aesthetics of the outer frame due to the formation of the outer height adjusting hole may be prevented.

The lever serves to retract the rear end of the locking rod by applying a force capable of overcoming the elastic force of the locking spring applying the elastic force to the locking rod through the unlocking bar. A handle in a substantially horizontal direction, rotatably coupled to and exposed to the outside of the inner frame;

A connecting rod having one side end coupled to the front end of the handle and rotatably coupled to the upper side wall of the inner frame;

The upper end is connected to the other end of the connecting rod located inside the frame through the side wall of the vertical frame and extends downward in the vertical direction. The lower end is composed of a swinging arm contacting the upper one side of the unlocking bar. .

That is, the lever has a structure in which the handle and the swing arm are coupled to the "a" shape by a connecting rod.

As described above, the book-stool height adjustment device of the present invention, in which the lever, the unlocking bar, and the locking member are sequentially coupled from the upper side to the lower side of the inner frame of the vertical frame, unlocking in which the movement of the lever serves as a lever. A device adapted to be transmitted to the locking rod through the bar, wherein upwardly rotating the rear end of the lever handle rotates the upper end of the unlocking arm to the rear side while the lower end of the swing arm rotates to the rear side with the connecting rod as the center of rotation. do.

Then, the rear rotation of the upper part of the unlocking bar is switched to the front rotation of the lower part of the unlocking bar by the engaging portion of the unlocking bar and the vertical frame, and the front rotational force of the lower part of the unlocking bar is the elastic force of the locking spring. By overcoming the locking rod from the outer height adjusting hole of the outer frame while reversing, the inner frame can be freely moved up and down with respect to the outer frame, that is, the height of the book and the stool can be adjusted.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

1 is a perspective view of a desk combined with the present invention height adjustment device, a cross-sectional view showing a fixed state of the present invention height adjustment device in FIG. 2, a cross-sectional view showing a height adjustment state of the present invention height adjustment device in FIG. 4 is an exploded perspective view of the height adjusting apparatus of the present invention.

As shown, the desk height adjustment device of the present invention, the lower end coupled to the floor member (M _L ) for balancing the desk or the bench in the state of being placed on the floor and a plurality of along the rear side wall (W _R ) The upper end is coupled to a square pipe-shaped outer frame 11A having an outer height adjusting hole H formed in a row, and a plate member M _U such as a top plate of a desk or a seat of a stool, and a lower end of the rear side wall W _R. One inner height adjusting hole (H ') is formed in the square pipe-shaped inner frame (11B) is inserted through the lower end is inserted into the outer frame (11A) sliding sliding reciprocating through the upper end of the outer frame (11A). Vertical frame 11 consisting of;

A connecting rod 12A rotatably coupled through an upper side wall of the inner frame 11B and positioned at both ends of the inner frame 11B, and a connecting rod outside the inner frame 11B. (12A) the bar-shaped handle 12B coupled to the front end at one end thereof to maintain a substantially horizontal state, and extends downward in the state where the upper end is coupled to the other end at the connection rod 12A inside the inner frame 11B. A lever 12 composed of a bar-shaped swing arm 12C forming a “a” shape with a handle 12B;

One side of the middle portion in the longitudinal direction is rotatably coupled to the inner surface of the side wall of the inner frame 11B, and the upper and lower portions are rotatable simultaneously in the opposite directions with respect to the coupling portion, and an upper portion of the lever 12 swings. An unlocking bar 13 in contact with the lower end of the arm 12C;

A housing 14A having a rear end coupled to an inner surface of the rear side wall adjacent to an inner height adjusting hole H 'of the inner frame 11B, and a rear end coupled to the housing 14A so as to be movable. The rear end and the inner height adjusting hole (H ') of 14A can be inserted into the outer height adjusting hole (H) of the outer frame (11A) and the front end can penetrate the front end of the housing (14A). A locking rod 14B located inside the inner frame 11B and having a locking means E such as a protrusion on which one end of the unlocking bar 13 is caught, and the front of the housing 14A. It consists of the locking member 14 which consists of the locking spring 14C which both ends are supported by the end inner surface and the outer peripheral surface behind the locking rod 14B.

Looking at the operation method of the height adjustment device of the present invention configured as described above are as follows.

When the rear end of the handle 12B is rotated upward about the connecting rod 12A of the lever 12 penetrated to one side side wall of the inner frame 11B, the lower end of the swing arm 12C rotates to the rear side. While pushing the upper portion of the unlocking bar 13 to the rear side.

Accordingly, the upper portion of the unlocking bar 13, in which the middle one side is rotatably coupled to the inner side wall of the inner frame 11B, rotates to the rear side around the engaging portion, and the lower end of the unlocking bar 13. Is rotated to the front side with respect to the engaging portion, the locking rod 14B connected by the lower end of the unlocking bar 13 and the locking means (E) which rotates to the rear side moves to the front side and the locking rod 14B The rear end of the exit from the height adjustment hole (H).

As described above, the locking rod 14B is separated from the outer height adjusting hole H of the outer frame 11A , so that the inner frame 11B is slidably moved upwards or downwards so that the entire length of the vertical frame 11 is reduced. , The height of the book and the stool can be adjusted, and after removing the force applied to the handle 12B of the lever 12 after the height adjustment, the locking rod 14B, which has been retracted to the front side by the locking spring 14C, is moved to the rear side. The rear end portion is penetrated through the inner height adjusting hole (H ') and inserted into the outer height adjusting hole (H) while being in the original position, thereby adjusting the height.

The structure of the present invention as described above is the most basic structure, in order to adjust the height of the book and the stool, while holding the upper plate member (M _U ) with your hand while operating the lever using the finger, until the height adjustment is completed The upper plate member (M _U ) should be held in a state of being held by a person, and in the case of children, it may not be possible or difficult to adjust the height due to lack of force, and the inner and outer frames 11B and 11A are simply inserted and coupled. Since the gap between the two vertical frames is small, it is difficult to slide smoothly, and when the gap is large, the coupling state between the two vertical frames may be difficult to maintain.

That is, it is necessary to minimize the flow of the inner frame 11B inside the outer frame 11A while allowing the up and down movement of the inner frame 11B to be easily performed, and thus, the upright portion of the inner frame 11B may be upright. A bottom plate having a guide rod 11A1 to which the guide rod 11A1 is inserted into the outer circumferential surface thereof, and the bottom surface of the bottom surface of the buffer spring 11A2 being in close contact with the coiled buffer spring 11A2 into which the guide rod 11A1 is inserted. It is preferable to couple 11B1 to the bottom surface of the inner frame 11B.

In addition, a circular or square cross section in which the buffer spring 11A2 is inserted in the center of the bottom surface of the bottom plate 11B1 to minimize shaking in the front, rear, left, and right directions when the inner frame 11B is moved up and down. The spring insertion tube 11B2 of the bottom may be coupled.

In addition, at least one guide roller 11B3 rotatably attached to at least one pair of inner surfaces of two pairs of inner surfaces of the outer frame 11A, respectively, is rotatable to the inner frame 11B and the spring insertion pipe 11B2. It is more preferable to bond to the outer surface.

That is, since the lower end of the inner frame 11B coupled to the upper plate member M _U is elastically supported by the shock absorbing spring 11A2, the inner frame 11B can be easily pressed or lifted, and the inner side Front and rear of the inner frame 11B by guide rollers 11B3 which are in close contact with the inner surfaces of the outer frame 11A and rotatably coupled to the outer surfaces of the frame 11B and the spring insertion pipe 11B2, respectively. Up and down movement can be easily performed while the flow in the left and right directions is minimized.

However, in the configuration as described above, the plurality of outer height adjusting holes H formed through the rear side wall of the outer frame 11A and the locking rod 14B inserted into any one of them are exposed to the outside. It may not be desirable because of the appearance of the stool, as shown in Figs. 5 and 6, the height adjusting piece (15) formed with a plurality of outer height adjusting holes (H) penetrated to the inner surface of the rear side wall of the outer frame (11A). It is also preferable to fix it.

That is, it is not necessary to form a plurality of outer height adjusting holes (H) through the rear side wall of the outer frame (11A) by the height adjustment piece 15 improves the appearance of the outer frame (11A), locking rod The rear end of the 14B is inserted into and coupled to the outer height adjusting hole H of the height adjusting piece 11A3 to be in close contact with the inner surface of the rear side wall of the outer frame 11A so as not to be exposed to the outside.

Finally, in the structure as described above, if the inner frame (11B) with respect to the outer frame (11A) does not pay attention to the inner frame (11B) may be completely out of the outer frame (11A), In order to prevent this, on the lower side of the outer circumferential surface of the spring insertion pipe 11B2 coupled to the bottom of the bottom plate 11B1 of the inner frame 11B, a separation preventing protrusion E 'protrudes from the surface thereof, and the outer frame 11A. ) Having a stopper coupling hole H ″ on one side wall, and having a rod or bar-shaped stopper S which is detachably penetrated to the stopper coupling hole H ″ and protrudes into the outer frame 11A. It is also preferable.

That is, when the inner frame 11B is inserted into and coupled to the outer frame 11A, the stopper S is detachably coupled to the stopper coupling hole H ″ and then the inner frame 11B is moved upward. As illustrated in FIG. 7, the separation prevention protrusion E ′ of the spring insertion pipe 11B2 coupled to the inner frame 11B is caught by the stopper S, and the inner frame 11B may be moved upward. Since the inner frame 11B can be prevented from being separated from the outer frame 11A, and the inner frame 11B is to be separated, separating the stopper S from the stopper coupling hole H ″. Just do it.

As described above, since the height adjustment device of the book and the stool of the present invention utilizes the elastic force of the lever and the spring, the height of the book and the stool can be adjusted even with a small force, and at the same time, the desk and the stool of the present invention are provided on both sides as the desk. Even when the devices are combined, there is an advantage that the height can be adjusted only by the force of one user.

Claims (14)

In the height adjustment device of a book and a stool, a square pipe-shaped outer frame (11A ) having a lower end coupled to the bottom member (M _L ) of a book and a stool and having a plurality of outer height adjusting holes (H) formed in the rear side wall (W _R ). ) And the upper end portion is coupled to the plate-shaped member M _U of the book / hanger, and an inner height adjusting hole H 'is formed at the lower end of the rear side wall W _R and inserted into the outer frame 11A so as to be flowable. A vertical frame 11 including an inner frame 11B having a square pipe shape coupled thereto; A connecting rod 12A rotatably coupled to the upper side wall of the inner frame 11B, a bar handle 12B having a front end coupled to an outer one end of the connecting rod 12A, and the connecting rod 12 A lever 12 composed of a swing arm 12C extending downward from an upper end coupled to an inner other end of 12A); An unlocking bar 13 having one side rotatably coupled to an inner surface of the side wall of the inner frame 11B and having an upper portion contacting a lower end of a swing arm 12C of the lever 12; The housing 14A coupled to the rear side wall inner surface adjacent to the inner height adjusting hole H 'and the housing 14A are fluidly coupled to the inside of the housing 14A, and the rear end is insertable and coupled to the outer height adjusting hole H. A locking rod 14B having an end portion penetrating through the housing 14A and being positioned inside the inner frame 11B and having a lower end of the unlocking bar 13 on one side of an outer surface thereof, and the housing. And a locking member (14) comprising a locking spring (14C) interposed between the front end inner surface of (14A) and a rear outer peripheral surface of the locking rod (14B). The height adjusting device of a book and a stool according to claim 1, wherein a bottom plate (11B1) is coupled to a bottom surface of the inner frame (11B). The height adjustment device according to claim 2, wherein a spring insertion tube (11B2) into which a coil buffer spring (11A2) is inserted is coupled to a center of the bottom surface of the bottom plate (11B1). The height adjustment device of the book and the stool according to claim 3, wherein a separation preventing protrusion (E ') is formed on a surface of the lower portion of the spring insertion pipe (11B2). 2. The book according to claim 1, wherein an upright guide rod (11A1) and a coiled buffer spring (11A2) into which the guide rod (11A1) is inserted are coupled to the inner bottom center portion of the outer frame (11A). Stool height adjustment device. The outer circumferential surface of any one of the inner surface 11B and the spring insertion pipe 11B2 has an outer circumferential surface on at least one of the inner surfaces of two pairs of inner surfaces of the outer frame 11A. A height adjusting device for a book and a stool, characterized in that one or more guide rollers 11B3 rotatably attached to each other are additionally coupled. The height adjuster of claim 1, wherein a stopper coupling hole (H ") through which the stopper (S) is detachably coupled is formed in one side wall of the outer frame (11A). In the height adjustment device of the book and the stool, the upper end is coupled to a square pipe-shaped outer frame 11A having a lower end coupled to the bottom member M _{L of the} book and the stool, and a plate-shaped member M _U of the stool and the stool. a rear side wall (W _R), the vertical frame 11 is adjustable inner height hole (H ') at the lower end is formed consisting of the inner frame (11B) of the square pipe-like coupling flowable inserted inside the outer frame (11A) and; A height adjusting piece (15) fixedly coupled to an inner surface of the rear side wall of the outer frame (11A) and having a plurality of outer height adjusting holes (H) therethrough; A connecting rod 12A rotatably coupled to the upper side wall of the inner frame 11B, a bar handle 12B having a front end coupled to an outer one end of the connecting rod 12A, and the connecting rod 12 A lever 12 composed of a swing arm 12C extending downward from an upper end coupled to an inner other end of 12A); An unlocking bar 13 having one side rotatably coupled to an inner surface of the side wall of the inner frame 11B and having an upper portion contacting a lower end of a swing arm 12C of the lever 12; The housing 14A coupled to the rear side wall inner surface adjacent to the inner height adjusting hole H 'and the housing 14A are fluidly coupled to the inside of the housing 14A, and the rear end is insertable and coupled to the outer height adjusting hole H. A locking rod 14B having an end portion penetrating through the housing 14A and being positioned inside the inner frame 11B and having a lower end of the unlocking bar 13 on one side of an outer surface thereof, and the housing. And a locking member (14) comprising a locking spring (14C) interposed between the front end inner surface of (14A) and a rear outer peripheral surface of the locking rod (14B). 10. The device according to claim 8, wherein a bottom plate (11B1) is coupled to a bottom surface of the inner frame (11B). 10. The device according to claim 9, wherein a spring insertion tube (11B2) into which a coil buffer spring (11A2) is inserted is coupled to the center of the bottom surface of the bottom plate (11B1). The height of claim 10, wherein the separation prevention projection (E ') is formed on the surface of the lower one side of the spring insertion tube (11B2) protruding. 9. The book according to claim 8, wherein an upright guide rod (11A1) and a coiled buffer spring (11A2) into which the guide rod (11A1) is inserted are coupled to an inner bottom center portion of the outer frame (11A). Stool height adjustment device. The outer circumferential surface of at least one pair of inner surfaces of two pairs of inner surfaces of the outer frame 11A is formed on the outer surface of the inner frame 11B and the spring insertion pipe 11B2. A height adjusting device for a book and a stool, characterized in that one or more guide rollers 11B3 rotatably attached to each other are additionally coupled. 10. The device according to claim 8, wherein a stopper coupling hole (H ") through which the stopper (S) can be detachably coupled is formed in one side wall of the outer frame (11A).

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