WO2024076198A1

WO2024076198A1 - Height-adjustable table

Info

Publication number: WO2024076198A1
Application number: PCT/KR2023/015411
Authority: WO
Inventors: 정근용
Original assignee: 주식회사 세라젬
Priority date: 2022-10-07
Filing date: 2023-10-06
Publication date: 2024-04-11
Also published as: KR20240048662A

Abstract

The present invention relates to a table. More specifically, the present invention relates to a height-adjustable table. A height-adjustable table according to an aspect of the present invention comprises: a body portion having an inner space provided therein, the body unit comprising an upper frame member and a lower frame member arranged to be stacked one above the other; leg portions provided on the lower frame member such that the body portion is arranged to be spaced apart from the ground; and a height-adjustment portion provided in the inner space, the height-adjustment portion comprising a driving member for applying driving power such that the height of the upper frame member is adjusted, and a guide member for guiding movements of the upper frame member along the height direction.

Description

Height-adjustable table

The present invention relates to tables. More specifically, it relates to a height-adjustable table.

In general, tables used in living rooms have a fixed height, so people who do not fit the body type have no choice but to use them in an uncomfortable position, which poses a risk of pain or injury.

Accordingly, interest in tables with height adjustment functions has recently been increasing. In particular, sitting and talking for a long time when the height of the table does not match the body type is harmful to health and reduces concentration of conversation, so interest in tables with adjustable height is increasing significantly.

However, there are cases where tables, such as desks, are configured to allow height adjustment. Korean Patent Publication No. 1637173 discloses a conventional height-adjustable table. These tables are configured to adjust the height of the table top by providing height adjustment members on the legs that support the table top. However, as the height adjustment members are provided on the legs, the volume of the legs increases, causing interference when using the table. There is a problem that arises. In addition, in the case of tables used in living rooms, the volume of the legs is minimized in consideration of aesthetics, so there is a limitation in applying height adjustment members to the legs.

Therefore, there is a need to develop technology for adjusting the height of tables where height adjustment members cannot be placed on the legs.

(Patent Document 1) Korean Patent Publication No. 1637173 (registered on July 1, 2016)

The present invention is to solve the above problems, and the purpose of the present invention is to provide a table that can adjust the height even when the height adjustment part cannot be placed on the leg portion.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention, a main body portion that has an internal space and is provided with an upper frame member and a lower frame member that are stacked with each other, a leg portion provided in the lower frame member so that the main body portion is spaced apart from the ground, and Height adjustment includes a height adjustment unit provided in the internal space and provided with a driving member that applies a driving force to adjust the height of the upper frame member and a guide member that guides the upper frame member to move along the height direction. Available tables are provided.

At this time, the guide member may include a first link bar and a second link bar that are intersecting each other.

At this time, one end of the first link bar is connected to one side in the width direction of the upper frame member, the other end of the first link bar is connected to the other side in the width direction of the lower frame member, and one end of the second link bar is connected to the other side in the width direction of the lower frame member. It may be connected to the other side in the width direction of the upper frame member, and the other end of the second link bar may be connected to one side in the width direction of the lower frame member.

At this time, one end of the first link bar and one end of the second link bar are respectively hinged and fixed to the upper frame member, and the other ends of the first link bar and the other ends of the second link bar slide along the width direction. Possibly, each may be connected to the lower frame member.

At this time, the upper frame member is provided with an upper support bar to which one end of the first link bar and one end of the second link bar are respectively hinged, and the lower frame member is provided with the other end of the first link bar and the second link. A lower support bar with a guide rail along the width direction may be provided so that the other end of the bar slides.

At this time, the lower support bar may be provided with a stopper that limits the sliding movement distance of the other end of the first link bar and the other end of the second link bar.

At this time, one end of the driving member may be fixed to one of the first link bar and the second link bar, and the other end of the driving member may be fixed to the upper frame member.

At this time, a link pin may be provided at a portion where the first link bar and the second link bar intersect.

At this time, the first link bar is provided with a first link hole along the extension direction of the first link bar, and the second link bar is provided with a second link hole along the extension direction of the second link bar, The link pin may be disposed to simultaneously penetrate the first link bar and the second link bar.

At this time, the guide member is connected to a support protrusion provided on any one of the upper frame member and the lower frame member and to the other frame member of the upper frame member and the lower frame member so that the support protrusion is inserted. It is provided and may include a support groove extending along the height direction.

At this time, the driving member and the guide member may be provided on at least one side along the longitudinal direction of the main body.

At this time, the upper frame member includes an upper support surface and an upper side wall extending in the height direction along the circumference of the upper support surface, and the lower frame member includes a lower support surface disposed opposite to the upper support surface, It includes a lower side wall extending in the height direction along the circumference of the lower support surface, and the upper frame member is configured to rise only to a height where the upper side wall overlaps the lower side wall and the width direction.

At this time, the upper frame member includes an upper support surface and an upper side wall extending in the height direction along the circumference of the upper support surface, and the lower frame member includes a lower support surface disposed opposite to the upper support surface, It includes a lower side wall extending in the height direction along the circumference of the lower support surface, and the rising height of the upper frame member is configured to be smaller than the combined height of the upper side wall and the height of the lower side wall.

According to the above configuration, the height-adjustable table according to the embodiment of the present invention adjusts the height of the upper frame member through the driving member while being placed in the inner space of the main body so that the height adjustment portion is not exposed to the outside, so that the leg Even when the height adjuster cannot be placed in the table, the height of the table can be adjusted, and since the height adjuster is not exposed to the outside, it is possible to prevent safety accidents from occurring during the process of adjusting the height of the table.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is a perspective view showing a state before the height of the table according to an embodiment of the present invention is raised.

Figure 2 is a cross-sectional view of portion I-I of Figure 1.

Figure 3 is a perspective view showing the arrangement of the guide member in a state before the height of the table according to an embodiment of the present invention is raised.

Figure 4 is a perspective view showing a state after the height of the table according to an embodiment of the present invention has been increased.

Figure 5 is a cross-sectional view of portion II-II of Figure 4.

Figure 6 is a perspective view showing the arrangement of the guide member in a state after the height of the table has been raised according to an embodiment of the present invention.

Figure 7 is a cross-sectional view of portion III-III of Figure 6.

Figure 8 is a perspective view showing the arrangement of the main body and the guide member in a state before the height of the table according to an embodiment of the present invention is raised.

Figure 9 is a cross-sectional view of portion IV-IV of Figure 8.

Figure 10 is a perspective view showing the arrangement of the main body and the guide member in a state after the height of the table has been raised according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description have been omitted in the drawings, and identical or similar components are given the same reference numerals throughout the specification.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

Figure 1 is a perspective view showing a state before the height of the table is raised according to an embodiment of the present invention, Figure 2 is a cross-sectional view of part I-I of Figure 1, and Figure 3 is a table according to an embodiment of the present invention. It is a perspective view showing the arrangement of the guide member in the state before the height of the table is raised, Figure 4 is a perspective view showing the state after the height of the table according to an embodiment of the present invention is raised, and Figure 5 is II of Figure 4 It is a cross-sectional view of part -II, Figure 6 is a perspective view showing the arrangement of the guide member in a state after the height of the table according to an embodiment of the present invention has been raised, and Figure 7 is a cross-sectional view of part III-III of Figure 6. Here, the X direction means the length direction, the Y direction means the width direction, and the Z direction means the height direction. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings.

As shown in FIGS. 1 and 4, a height-adjustable table according to an embodiment of the present invention includes a main body 100 provided with an internal space 100a. As an example, the main body 100 may have a polyhedral shape with an internal space 100a, but is not necessarily limited to this. If an internal space 100a is provided in which the height adjustment unit 300, which will be described later, can be placed, Any shape is possible.

The main body 100 is provided with an upper frame member 110 and a lower frame member 120 that are stacked with each other. The leg portion 200 is fixedly disposed on the lower frame member 120 so that the main body portion 100 is spaced apart from the ground. That is, while the height of the lower frame member 120 is fixed, only the height of the upper frame member 110 is adjusted.

As shown in FIGS. 2 and 5, the lower frame member 120 has a lower support surface 120a disposed parallel to the ground and extends in the height direction (Z) along the circumference of this lower support surface 120a. It may include a lower side wall 120b. The upper frame member 110 may include an upper support surface 110a disposed parallel to the ground and an upper side wall 110b extending in the height direction (Z) along the circumference of the upper support surface 110a. .

At this time, the upper support surface 110a and the lower support surface 120a may be arranged parallel to each other, and the upper side wall 110b may be arranged to surround the outer surface of the lower side wall 120b. That is, the internal space 100a may be a space surrounded by the upper frame member 110 and the lower frame member 120, and a height adjustment unit 300, which will be described later, may be arranged in this space.

At this time, as shown in FIG. 2, in the state before the height of the table is raised, the upper side wall 110b and the lower side wall 120b are arranged to overlap each other along the width direction (Y) and the longitudinal direction (X), As shown in FIG. 5, even after the height of the table is raised, the upper side wall 110b and the lower side wall 120b are arranged to overlap each other along the width direction (Y) and the longitudinal direction (X). With this configuration, it is possible to prevent the height adjustment unit 300 from being exposed to the outside by preventing the internal space 100a of the main body 100 from being opened not only before but also after the height of the table rises.

As described above, the internal space 100a provided in the main body 100 is provided with a height adjustment unit 300, and this height adjustment unit 300 provides a driving force to adjust the height of the upper frame member 110. It includes a driving member 310 that applies and a guide member 320 that guides the upper frame member 110 to move along the height direction (Z).

The driving member 310 provides a driving force so that the upper frame member 110 moves along the height direction (Z), and moves the upper frame member 110 in the height direction (Z), such as a hydraulic cylinder, pneumatic cylinder, or linear motor. Any configuration that can be used can be used.

That is, the height of the upper frame member 110 is adjusted through the driving member 310 while the height adjustment unit 300 is placed in the internal space 100a of the main body 100 so that it is not exposed to the outside, so that the leg Even if the height adjustment unit 300 cannot be placed on the unit 200, the height of the table can be adjusted, and since the height adjustment unit 300 is not exposed to the outside, safety accidents may occur during the process of adjusting the height of the table. You can prevent it from happening.

As shown in FIGS. 3 and 6 , the guide member 320 may include a first link bar 321 and a second link bar 322 that are arranged to cross each other. The first link bar 321 and the second link bar 322 may be made of a material that can withstand the self-weight of the upper frame member 110 and the load applied through the upper frame member 110, as an example. , It may be made of a steel material, but is not necessarily limited to this, and can be made of various materials such as alloy as long as it can withstand the self-weight of the upper frame member 110 and the load applied through the upper frame member 110. It may be configured.

The first link bar 321 and the second link bar 322 can be arranged to intersect each other, and when configured in this way, the first link bar 321 and the second link bar 322 are configured to have sufficient length. Even so, it can be stably accommodated in the internal space 100a of the main body 100. Furthermore, the first link bar 321 and the second link bar 322 are connected to each other through a link pin 323, which will be described later, so that the self-weight of the upper frame member 110 and the load applied through the upper frame member 110 Structural stability can be improved by configuring it to withstand together.

As shown in Figures 2 and 5, one end of the first link bar 321 is connected to one side in the width direction (Y) of the upper frame member 110, and the other end of the first link bar 321 is connected to the lower frame member. It is connected to the other side in the width direction (Y) of the upper frame member 110, and one end of the second link bar 322 is connected to the other side in the width direction (Y) of the upper frame member 110, and the other end of the second link bar 322 may be connected to one side of the lower frame member 120 in the width direction (Y).

With this configuration, when the load is concentrated on one side in the width direction (Y) of the upper frame member 110, not only can the load be supported through the first link bar 321, but this load can also support the first link bar 321. As it is transmitted to the other side in the width direction (Y) of the lower frame member 120, the load applied to one side of the table can be evenly distributed to one side and the other side in the width direction (Y), thereby improving the structural stability of the table. In addition, when the load is concentrated on the other side in the width direction (Y) of the upper frame member 110, not only can it be supported as a load through the second link bar 322, but this load can also be transmitted to the lower part through the second link bar 322. The load applied to the other side of the table while being transmitted to one side in the width direction (Y) of the frame member 120 can be evenly distributed to one side and the other side in the width direction (Y), thereby improving the structural stability of the table.

As shown in Figures 2 and 5, one end of the first link bar 321 and one end of the second link bar 322 are respectively fixed to the upper frame member 110 with a hinge (h), and the first link bar The other end of 321 and the other end of the second link bar 322 may be respectively connected to the lower frame member 120 to enable sliding movement along the width direction (Y).

Considering the manufacturability of the table, it is important to configure the first link bar 321 and the second link bar 322 so that they can be easily installed. That is, the assembly inclination of the first link bar 321 and the second link bar 322 is determined depending on the height direction (Z) arrangement status of the upper frame member 110 and the lower frame member 120. If the first link When both ends of the bar 321 and the second link bar 322 are hinged, the first link bar 321 and the second link bar 322 are positioned accurately at an assembly inclination. Since both ends of the second link bar 322 must be fixed with hinges, manufacturability is reduced.

Therefore, as described above, one end of the first link bar 321 and one end of the second link bar 322 are hinged (h) fixed to the upper frame member 110, and the other end of the first link bar 321 and When the other end of the second link bar 322 is connected to the lower frame member 120 so as to be slidably movable along the width direction (Y), one end of the first link bar 321 and one end of the second link bar 322 are connected to each other. It is possible to install the first link bar 321 and the second link bar 322 while freely changing their angles while the hinge is fixed, thereby improving manufacturability.

As shown in FIGS. 2 and 5, the upper frame member 110 is provided with an upper support bar 111 on which one end of the first link bar 321 and one end of the second link bar 322 are respectively fixed with a hinge (h). ) is provided, and the lower frame member 120 is provided with a guide rail 121a along the width direction (Y) so that the other end of the first link bar 321 and the other end of the second link bar 322 slide. A lower support bar 121 may be provided.

That is, one end of the first link bar 321 and one end of the second link bar 322 are hinged (h) fixed to the upper support bar 111 provided on the upper frame member 110. (321) and the second link bar 322 are installed, and the other end of the first link bar 321 and the other end of the second link bar 322 are lower support bars 121 provided on the lower frame member 120. Since they are connected to enable sliding movement along the width direction (Y), the ease of installation of the first link bar 321 and the second link bar 322 is improved.

At this time, the lower support bar 121 may be provided with a guide rail 121a along the width direction (Y) so that the other end of the first link bar 321 and the other end of the second link bar 322 can slide. , the other end of the first link bar 321 and the other end of the second link bar 322 are easily connected to the other end of the first link bar 321 and the other end of the second link bar 322 along the guide rail 121a. A guide roller 121b may be provided for sliding movement. The guide rail 121a may be arranged to partially surround one side and the other side of the guide roller 121b, and when the guide roller 121b is inserted into the guide rail 121a, it guides the main body 100 in the height adjustment process. The roller 121b can be prevented from moving.

As shown in Figures 2 and 5, the lower support bar 121 is provided with a stopper 121c that limits the sliding movement distance between the other end of the first link bar 321 and the other end of the second link bar 322. It can be. This stopper 121c may be formed integrally with the lower support bar 121, but if it is possible to limit the sliding movement distance between the other end of the first link bar 321 and the other end of the second link bar 322, it may be installed separately. It may also be configured to mount a stopper (121c). When the stopper 121c is provided in this way, structural stability can be improved because the first link bar 321 and the second link bar 322 can be prevented from being overly erected when the upper frame member 110 rises. .

As shown in Figures 2 and 5, one end of the driving member 310 is fixed to one of the first link bar 321 and the second link bar 322, and the other end of the driving member 310 Can be fixed to the upper frame member 110. That is, while one end of the driving member 310 is fixed to one of the first link bar 321 and the second link bar 322, the other end of the driving member 310 is attached to the upper frame member 110. Since it is fixed, the upper frame member 110 can be effectively raised or lowered even if the length of the driving member 310 is shortened. Since the inclination of the driving member 310 changes as the upper frame member 110 rises or falls, it is preferable that both ends are hinged.

As shown in FIG. 7, a link pin 323 may be provided at a portion where the first link bar 321 and the second link bar 322 intersect. As described above, the first link bar 321 and the second link bar 322 are arranged to intersect each other, and the first link bar 321 and the second link bar 322 are connected to each other by the link pin 323. When connected, the self-weight of the upper frame member 110 or the load applied to the upper frame member 110 is evenly distributed to the first link bar 321 and the second link bar 322, thereby enabling stable support.

Figure 8 is a perspective view showing the arrangement of the main body and the guide member in a state before the height of the table is raised according to an embodiment of the present invention, Figure 9 is a cross-sectional view of portion IV-IV of Figure 8, and Figure 10 is a is a perspective view showing the arrangement of the main body and the guide member after the height of the table has been raised according to an embodiment of the present invention.

As shown in FIGS. 8 and 10, the first link bar 321 is provided with a first link hole 321a along the extending direction of the first link bar 321, and the second link bar 322 is provided with a first link hole 321a. A second link hole (322a) is provided along the extension direction of the second link bar 322, and the link pin 323 penetrates the first link bar 321 and the second link bar 322 at the same time. can be placed.

That is, the first link bar 321 and the second link bar 322 are connected to each other by the link pin 323, and these link pins 323 are connected to the first link bar 321 and the second link bar 322. ) In order to be fixed at a specific position, it is necessary to select the exact position of the link pin 323 when designing the height adjustment unit 300. This is because the inclination of the first link bar 321 and the second link bar 322 changes continuously as the upper frame member 110 rises or falls. However, if configured in this way, there may be a problem that the ease of design of the height adjustment unit 300 is reduced. Therefore, as described above, the link pin 323 penetrates the first link hole 321a and the second link hole 322a at the same time and flows along the first link hole 321a and the second link hole 322a. When configured to be movable, the position of the link pin 323 changes freely even if the inclination of the first link bar 321 and the second link bar 322 changes continuously as the upper frame member 110 rises or falls. Stable support is possible, and design ease is improved because there is no need to select the exact position of the link pin 323 when designing the height adjustment unit 300.

As shown in FIG. 9, the guide member 320 is inserted into the support protrusion 324 provided on any one of the upper frame member 110 and the lower frame member 120. Preferably, it is provided on the other frame member of the upper frame member 110 and the lower frame member 120, and may include a support groove 325 extending along the height direction (Z).

In this way, one frame member is provided with a support protrusion 324, and this support protrusion 324 is inserted into the other frame member, and a support groove 325 extending along the height direction (Z) is provided. This allows stable height adjustment even if the load is concentrated on one side or the other side of the upper frame member 110 when the upper frame member 110 is raised or lowered.

At this time, the driving member 310 and the guide member 320 may be provided on at least one side of the main body 100 along the longitudinal direction (X). That is, the driving member 310 and the guide member 320 are used to maintain the main body portion 100 as long as the upper frame member 110 is not biased to one side in the longitudinal direction (X) when the upper frame member 110 is raised or lowered. ) It is possible to be provided only on one side of the longitudinal direction (X), or to be provided on both sides of the longitudinal direction (X) of the main body 100.

As described above, the upper frame member 110 includes an upper support surface 110a, an upper side wall 110b extending in the height direction (Z) along the circumference of the upper support surface 110a, and a lower frame. The member 120 includes a lower support surface 120a disposed opposite to the upper support surface 110a, and a lower side wall 120b extending in the height direction (Z) along the circumference of the lower support surface 120a. . At this time, the upper frame member 110 is configured to rise only to a height at which the upper side wall 110b overlaps the lower side wall 120b along the width direction (Y). That is, as shown in FIG. 2, when the upper frame member 110 is lowered (state before the table height is raised), the upper side wall 110b and the lower side wall 120b are arranged to overlap along the width direction (Y). . In addition, even when the upper frame member 110 is raised (state after the table height has been raised), the upper side wall 110b and the lower side wall 120b are configured to rise only to a height where they overlap along the width direction Y. With this configuration, it is possible to prevent the height adjustment unit 300 from being exposed to the outside by preventing the internal space 100a of the main body 100 from being opened not only before but also after the height of the table rises.

In addition, the rising height of the upper frame member 110 is configured to be smaller than the combined height of the upper side wall 110b and the lower side wall 120b. With this configuration, it is possible to prevent the height adjustment unit 300 from being exposed to the outside by preventing the internal space 100a of the main body 100 from being opened not only before but also after the height of the table rises.

As seen above, the height-adjustable table according to the embodiment of the present invention is arranged in the internal space 100a of the main body 100 so that the height adjustment unit 300 is not exposed to the outside, and the driving member 310 ) Since the height of the upper frame member 110 is adjusted through Since it is not exposed, it is possible to prevent safety accidents from occurring during the process of adjusting the height of the table.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented in the present specification, and those skilled in the art who understand the spirit of the present invention will understand the spirit of the present invention within the scope of the same spirit. Other embodiments can be easily proposed by addition, change, deletion, addition, etc., but this will also be said to fall within the scope of the present invention.

Claims

a main body having an internal space and having an upper frame member and a lower frame member that are stacked on each other;

a leg portion provided on the lower frame member so that the main body portion is spaced apart from the ground; and

a height adjustment unit provided in the interior space and including a driving member that applies a driving force to adjust the height of the upper frame member and a guide member that guides the upper frame member to move along a height direction;

Height-adjustable table including.
According to paragraph 1,

The guide member is a height-adjustable table including a first link bar and a second link bar arranged to cross each other.
According to paragraph 2,

One end of the first link bar is connected to one side in the width direction of the upper frame member, and the other end of the first link bar is connected to the other side in the width direction of the lower frame member,

A height-adjustable table wherein one end of the second link bar is connected to the other side in the width direction of the upper frame member, and the other end of the second link bar is connected to one side in the width direction of the lower frame member.
According to paragraph 3,

One end of the first link bar and one end of the second link bar are respectively hinged and fixed to the upper frame member,

A height-adjustable table in which the other end of the first link bar and the other end of the second link bar are respectively connected to the lower frame member to enable sliding movement along the width direction.
According to clause 4,

The upper frame member is provided with an upper support bar on which one end of the first link bar and one end of the second link bar are respectively hinged,

A height-adjustable table wherein the lower frame member is provided with a lower support bar provided with a guide rail along the width direction so that the other end of the first link bar and the other end of the second link bar slide.
According to clause 5,

A height-adjustable table wherein the lower support bar is provided with a stopper that limits the sliding movement distance of the other end of the first link bar and the other end of the second link bar.
According to clause 4,

One end of the driving member is fixed to one of the first link bar and the second link bar,

A height-adjustable table wherein the other end of the driving member is fixed to the upper frame member.
According to clause 4,

A height-adjustable table in which a link pin is provided at a portion where the first link bar and the second link bar intersect.
According to clause 8,

The first link bar is provided with a first link hole along the extension direction of the first link bar,

The second link bar is provided with a second link hole along the extension direction of the second link bar,

A height-adjustable table wherein the link pin is disposed to simultaneously penetrate the first link bar and the second link bar.
According to paragraph 2,

The guide member is,

a support protrusion provided on one of the upper frame member and the lower frame member; and

a support groove provided on the other frame member of the upper frame member and the lower frame member so that the support protrusion is inserted, and extending along a height direction;

Height-adjustable table including.
According to paragraph 1,

A height-adjustable table wherein the driving member and the guide member are provided on at least one side along the longitudinal direction of the main body.
According to paragraph 1,

The upper frame member includes an upper support surface and an upper side wall extending in the height direction along the circumference of the upper support surface,

The lower frame member includes a lower support surface disposed opposite to the upper support surface, and a lower side wall extending in the height direction along the circumference of the lower support surface,

A height-adjustable table in which the upper frame member rises only to a height where the upper side wall overlaps the lower side wall along the width direction.
According to paragraph 1,

The upper frame member includes an upper support surface and an upper side wall extending in the height direction along the circumference of the upper support surface,

The lower frame member includes a lower support surface disposed opposite to the upper support surface, and a lower side wall extending in the height direction along the circumference of the lower support surface,

A height-adjustable table wherein the rising height of the upper frame member is smaller than the combined height of the upper side wall and the lower side wall.