Patent Description:
The display supporting apparatus may be provided to install the display device on a flat installation surface such as a desk or a vertical surface such as a wall surface or may be provided in a form detachably fixed to an edge of a desk.

In the case of the display supporting apparatus disclosed in <CIT>) (hereinafter referred to as Prior Art <NUM>), the display device has features capable of tilting, rotating, and adjusting the height.

However, since this type of display supporting apparatus can only adjust the height through rotation of the link, there is a limit to the height adjustment range of the display device.

In addition, despite the structure that prevents the display device from descending to the bottom due to the load by the elastic force of the spring provided inside the link, since the elastic force of the spring cannot be varied, there is a limit that can support only one type of display device. In other words, since it cannot stably support display devices of different sizes and loads, there is a problem of poor compatibility.

In addition, in the case of the display supporting apparatus disclosed in <CIT>) (hereinafter referred to as Prior Art <NUM>), not only the problem of Prior Art <NUM>, but also the height adjustment method is very inconvenient.

In detail, according to the stand of Prior Art <NUM>, in order to adjust the height of the supporting apparatus, it is necessary to loosen the fixing portion and then manually lift the arm portion. At this time, it is not easy for the user to lift the arm portion because of the rotational moment caused by the load of the display panel as well as the load of the display panel.

In addition, since the arm portion must be lifted in a state where the fixing portion is loosened, a phenomenon in which the display panel descends downward due to the load of the display panel and the arm may occur. To do this, in the process of loosening the fixing portion, one hand holds the display panel or another person has to help.

In addition, in order to fix the display supporting apparatus to the desk, the pressure plate is in close contact with the bottom surface of the desk in a state where the bracket is in close contact with the upper surface of the desk. At this time, since the area of the pressure plate is significantly smaller than the area of the bracket, there is a problem in that the supporting apparatus is not stably fixed to the desk. For example, a phenomenon in which the supporting apparatus is shaken may occur due to an external force applied to the display panel to tilt or rotate the display panel.

In addition, in the case of the supporting apparatus disclosed in Prior Art <NUM>, the bracket must always be coupled to the desk in a form fitted to the edge of the desk. Therefore, in a state where the two edges of the adjacent desks are installed in close contact with the corner of the wall of the indoor space, there is a problem in that the installation environment is limited in that they can only be mounted on the opposite side that is not in close contact with the wall.

Furthermore, <CIT> relates to a support stand comprising a mounting assembly, a suspension arm, a swinging arm, a stretcher and a holder frame assembly. The mounting assembly comprises a mounting shaft, attention clamp extending through a bottom side of the mounting shaft, and a rod member vertically located on the top side of the mounting shaft.

The present disclosure is proposed to improve the above problems.

This object is solved by the present invention as defined in the independent claim. Preferred embodiments can be derived from the dependent claims.

As a mere example to better understand the present disclosure, a display supporting apparatus may include a clamp unit fixed to an installation surface; a pillar unit connected to the clamp unit to rotate about a vertical axis; a neck unit connected to an end portion of the pillar unit to rotate about a vertical axis; an arm unit connected to an end portion of the neck unit to rotate about a first horizontal axis; a connection unit connected to an end portion of the arm unit to rotate about the first horizontal axis; and a display supporting unit connected to the connection unit, having a display unit mounted on a front surface thereof, and rotatable about the first horizontal axis, a second horizontal axis, and the vertical axis.

According to the display supporting apparatus according to the present disclosure, the following effects are obtained.

First, since a spring force of a coil spring constituting an elastic adjustment body can be freely adjusted, various types of display panels can be mounted without being affected by the size and load of the display panel.

Second, in a state where the display supporting apparatus is mounted on an installation surface such as a desk, there is an advantage in that the height of the display panel can be easily adjusted.

Third, since the display panel can rotate primarily about a vertical axis with respect to the connection unit, the neck unit can rotate secondarily about a vertical axis with respect to the pillar unit, and the pillar unit can rotate thirdly about a vertical axis with respect to the clamp unit, there is an advantage in that the rotation range of the display panel in the left and right direction is remarkably widened.

Fourth, since the pillar unit rotates to one side (for example, clockwise direction) about a vertical axis with respect to the clamp unit, the neck unit rotates to the other side (for example, counterclockwise direction) about the vertical axis with respect to the pillar unit, and the swivel module rotates to one side (for example, clockwise direction) about a vertical axis with respect to the connection unit, there is an advantage in that a range capable of adjusting the position of the display panel in a front and rear direction is remarkably increased.

Fifth, since the display panel can primarily rotate about a second horizontal axis (x-axis) by the swivel module, the connection unit can rotate secondarily about the second horizontal axis with respect to the arm unit, and the arm unit can rotate about the second horizontal axis with respect to the neck unit, there is an advantage in that the rotation range of the display panel in the up and down direction is remarkably widened.

Sixth, since, in a state where the clamp body constituting the clamp unit is placed on the upper surface of the installation surface, the pressure plate is in close contact with the lower surface of the installation surface, in addition to fixing the clamp unit, the upper surface of the clamp cover constituting the clamp unit is in close contact with the bottom surface of the installation surface to fix the clamp unit, the clamp unit can be stably fixed.

Seventh, by the elastic force of the pressure spring constituting the clamp unit, while the bottom portion of the clamp cover is tilted slightly lower than the horizontal state, the catching end of the clamp cover is firmly inserted into the catching groove formed at the extended end of the clamp body. As a result, in a state where the clamp unit is fixed to the installation surface, shaking caused by the load of the display supporting apparatus excluding the display panel and the clamp unit can be minimized.

Eighth, the clamp unit according to the embodiment of the present disclosure has the advantage of being fitted to the cable through-hole formed in the table and mounted in addition to the conventional coupling method in which the extended end of the clamp body is in close contact with the side surface of the table.

Hereinafter, a display supporting apparatus according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

<FIG> is a perspective view illustrating an installation state of a display supporting apparatus according to an embodiment of the present disclosure, and <FIG> is a perspective view illustrating a display supporting apparatus according to an embodiment of the present disclosure.

Referring to <FIG> and <FIG>, a display supporting apparatus <NUM> according to an embodiment of the present disclosure has one end portion fixed to an edge of an installation surface including a desk and the other end portion coupled to a rear surface of a display panel D.

In detail, the display supporting apparatus <NUM> includes a display supporting unit <NUM> mounted on the rear surface of the display panel D. The display supporting unit <NUM> enables the display panel D to rotate about a first horizontal axis and tilt or pivot about a second horizontal axis.

In addition, the display supporting apparatus <NUM> further includes a connection unit <NUM> to which the display supporting unit <NUM> is rotatably connected to a front end.

In addition, the display supporting unit <NUM> is rotatable about a vertical axis while being connected to the connection unit <NUM>.

Here, the first horizontal axis refers to a z-axis extending in a front and rear direction of the display panel D, and the second horizontal axis refers to an x-axis extending in a left and right direction of the display panel D, and the vertical axis refers to a y-axis extending in an up and down direction of the display panel D.

Also, the first horizontal axis may mean the x-axis, and the second horizontal axis may mean the z-axis.

In addition, the display supporting apparatus <NUM> further includes an arm unit <NUM> to which the connection unit <NUM> is rotatably connected about a second horizontal axis (x-axis) at a front end.

In addition, the display supporting apparatus <NUM> further includes a neck unit <NUM> connected to the rear side of the arm unit <NUM>.

In detail, the arm unit <NUM> can be tilted about a second horizontal axis in the up and down direction while being connected to the neck unit <NUM>, and singularly rotate with the neck unit <NUM> about a vertical axis in the left and right direction.

In addition, the display supporting apparatus <NUM> further includes a pillar unit <NUM> supporting the neck unit <NUM>.

The pillar unit <NUM> enables height adjustment of the display panel D in the up and down direction, which will be described in detail with reference to the drawings below.

In addition, the display supporting apparatus <NUM> further includes a clamp unit <NUM> that supports the pillar unit <NUM> and is fixed to an installation surface.

The pillar unit <NUM> rotates about a vertical axis in a state of being mounted on the clamp unit <NUM> in the left and right direction.

Reference numeral C, which is not explained, is a cable extending from the display panel and transmitting power and control signals.

Hereinafter, each of the units constituting the display supporting apparatus <NUM>, that is, the display supporting unit <NUM> to the clamp unit <NUM>, will be described in detail with reference to drawings.

<FIG> is a side cross-sectional view illustrating the display supporting apparatus according to an embodiment of the present disclosure taken along line <NUM>-<NUM> of <FIG> illustrating a connection structure from the display supporting unit to the neck unit, and <FIG> is an exploded perspective view illustrating a display supporting apparatus according to an embodiment of the present disclosure illustrating a configuration from a display supporting unit to a neck unit.

Referring to <FIG> and <FIG>, the display supporting unit <NUM> constituting the display supporting apparatus <NUM> according to the embodiment of the present disclosure may include a supporting plate <NUM> fixed to the rear surface of the display panel D; a swivel module <NUM> connected to the rear surface of the supporting plate <NUM>; and a back cover <NUM> fixed to the rear surface of the supporting plate <NUM> and accommodating the swivel module <NUM> therein.

In detail, the arm unit <NUM> constituting the display supporting apparatus <NUM> may include a base cover <NUM> defining a bottom, an inner cover <NUM> coupled to an upper surface of the base cover <NUM>, and an outer cover <NUM> surrounding the inner cover <NUM>.

A coupling body of the base cover <NUM>, the inner cover <NUM>, and the outer cover <NUM> may be defined as a case.

In addition, the arm unit <NUM> further includes a main link <NUM> and an auxiliary link <NUM> mounted in an inner space defined by the inner cover <NUM> and the base cover <NUM>. A coupling body of the main link <NUM> and the auxiliary link <NUM> are defined as a link assembly.

In addition, the arm unit <NUM> further includes an elastic adjustment body <NUM> accommodated inside the inner cover <NUM> and a spring supporting bracket <NUM> connected to the front end of the elastic adjustment body <NUM>. The spring supporting bracket <NUM> is fixed to the upper surface of the inner cover <NUM>.

In addition, the arm unit <NUM> and the display supporting unit <NUM> may be connected by the connection unit <NUM> to be relatively rotatable.

Meanwhile, the neck unit <NUM> may include a link coupler <NUM> having a portion of upper side which is inserted into the arm unit <NUM>.

In detail, the rear end of the elastic adjustment body <NUM> passes through the link coupler <NUM> and is rotatably connected to the link coupler <NUM>.

The neck unit <NUM> may further include a swivel shaft <NUM> inserted into the link coupler <NUM> from the bottom surface of the link coupler <NUM>, and a swivel bushing <NUM> into which about half of the lower side of the swivel shaft <NUM> is inserted.

In addition, the neck unit <NUM> may further include a swivel bushing pin <NUM> passing through the swivel bushing <NUM> and a bearing <NUM> coupled to a lower end of the link coupler <NUM>.

Hereinafter, the connection structure and function of each component constituting the display supporting unit <NUM>, connection unit <NUM>, arm unit <NUM>, and neck unit <NUM> will be described with reference to drawings.

Among the reference numerals illustrated in <FIG>, there are unexplained numerals, but these unexplained numerals will be described in more detail in the description of individual components later.

<FIG> is a front perspective view illustrating a supporting plate constituting a display supporting unit according to an embodiment of the present disclosure, and <FIG> is a rear perspective view illustrating the supporting plate.

Referring to <FIG> and <FIG>, the supporting plate <NUM> according to the embodiment of the present disclosure may include a plate body <NUM>.

The plate body <NUM> may have a rectangular shape, but is not necessarily limited thereto.

A panel supporting protrusion <NUM> for supporting the lower end of the display panel D may protrude forward from the lower end of the plate body <NUM>.

A shaft hole <NUM> is formed at the center of the plate body <NUM>, and a central shaft of the display panel D corresponding to a first horizontal axis (z-axis) is inserted into the shaft hole <NUM>.

A limiting slit <NUM> in the form of an arc is formed at a point spaced apart from the shaft hole <NUM> by a predetermined distance. The length of the limiting slit <NUM> in the circumferential direction means the maximum amount of rotation of the display panel D.

Fastening holes <NUM> may be respectively formed at four corners of the plate body <NUM>.

<FIG> is a front perspective view illustrating a back cover constituting a display supporting unit according to an embodiment of the present disclosure, and <FIG> is a rear perspective view illustrating the back cover.

Referring to <FIG>, <FIG>, and <FIG>, the back cover <NUM> according to the embodiment of the present disclosure may include a cover body <NUM> and a swivel module accommodation portion <NUM> extending backward from the inside of the cover body <NUM>.

In detail, the swivel module accommodation portion <NUM> may be formed in a cut cone shape with a diameter narrowing toward the rear, and a swivel module through-hole <NUM> is formed at the rear end of the swivel module accommodation portion <NUM>.

The cover body <NUM> is coupled to the supporting plate <NUM> in a form in close contact with the rear surface of the supporting plate <NUM>.

A plurality of fastening bosses <NUM> protrude from the front surface of the cover body <NUM>, and the plurality of fastening bosses <NUM> are aligned with the plurality of fastening holes <NUM> formed in the supporting plate <NUM>. In addition, a fastening member such as a screw may pass through the fastening hole <NUM> and be inserted into the fastening boss <NUM>.

In addition, the swivel module <NUM> is accommodated in the swivel module accommodation portion <NUM>, and as illustrated in <FIG>, a portion of the swivel module <NUM> may protrude to the outside of the back cover <NUM> through the swivel module through-hole <NUM>.

<FIG> is a front perspective view illustrating a swivel module constituting a display supporting unit according to an embodiment of the present disclosure, <FIG> is a rear perspective view illustrating the swivel module, <FIG> is an exploded perspective view illustrating the swivel module, and <FIG> is a perspective view illustrating a module body constituting a swivel module.

Referring to <FIG> and <FIG>, the swivel module <NUM> according to the embodiment of the present disclosure may include a pivot shaft <NUM>, and a pivot bracket <NUM> to which the pivot shaft <NUM> is coupled to the front surface.

In detail, as illustrated in <FIG>, the pivot shaft <NUM> passes through the shaft hole <NUM> of the supporting plate <NUM> and is inserted into the front surface of the pivot bracket <NUM>.

The pivot bracket <NUM> includes a front portion <NUM> in close contact with the rear surface of the supporting plate <NUM> and side portions <NUM> bent backward at both side ends of the front portion <NUM>.

A shaft hole <NUM> is formed in the center of the front portion <NUM>, the pivot shaft <NUM> is fitted to the shaft hole <NUM>, and one or a plurality of washers w may be fitted to the pivot shaft <NUM>. Specifically, the one or a plurality of washers w may be fitted to the outer circumferential surface of the pivot shaft <NUM> protruding from the rear of the front portion <NUM>.

Of course, a washer may be interposed between the front portion <NUM> and the rear surface of the supporting plate <NUM>, or between the head portion of the pivot shaft <NUM> and the front surface of the supporting plate <NUM>, or both.

A pivot limiter <NUM> protrudes forward from an upper end of the front portion <NUM> and is inserted into the limiting slit <NUM> of the supporting plate <NUM>. When the display panel D rotates in the clockwise direction (or in the counterclockwise direction) about the first horizontal axis (z-axis), the pivot limiter <NUM> rotates in the counterclockwise direction (or in the clockwise direction) along the limiting slit <NUM> relative to each other.

A spring pressure protrusion <NUM> extends backward at the lower end of the front portion <NUM> and presses one end portion of the torsion spring <NUM> to be described later.

A shaft hole <NUM> is formed in the side portion <NUM>, and two washer fixing holes <NUM> are formed at a point spaced apart from the edge of the shaft hole <NUM>. The two washer fixing holes <NUM> are formed at points facing each other about the shaft hole <NUM>.

In addition, a tilt limiting groove <NUM> is formed at the lower end of the side portion <NUM>. The tilt limiting groove <NUM> limits the rotation of the pivot bracket <NUM> in the up and down direction about the second horizontal axis (x-axis). A tilt limiter <NUM> to be described later is accommodated in the tilt limiting groove <NUM> to limit the tilting range of the pivot bracket <NUM>.

Meanwhile, the swivel module <NUM> may further include a module body <NUM>, a torsion spring <NUM> placed in the left and right direction of the module body <NUM> inside the module body <NUM>, a tilt shaft <NUM> passing through the side of the module body <NUM> and the torsion spring <NUM>, a pivot bracket <NUM> coupled to both sides of the module body <NUM>, and a module cover <NUM> accommodating a portion of the module body <NUM>.

In addition, the module body <NUM> includes a swivel body <NUM>, a swivel head <NUM>, and a connecting rod <NUM> connecting the swivel body <NUM> and the swivel head <NUM>.

In detail, the tilt shaft <NUM> passes through one side of the swivel body <NUM>, is inserted into the torsion spring <NUM>, and then passes through the other side of the swivel body <NUM>. In addition, a nut 28a is fitted to an outer circumferential surface of the tilt shaft <NUM> protruding through the other side surface of the swivel body <NUM>.

In addition, one or a plurality of washers w and a fixed washer w1 may be fitted to the outer circumferential surface of the tilt shaft <NUM> corresponding between one side of the swivel body <NUM> and the head of the tilt shaft <NUM> and between the nut 28a and the other side of the swivel body <NUM>.

The washer w may be an elastic washer, and the fixed washer w1 is fixed to the side surface of the module body <NUM>.

A tilt limiter <NUM> is fitted to both sides of the swivel body <NUM> corresponding to the lower side of the tilt shaft <NUM>, and the head portion of the tilt limiter <NUM> is accommodated in the tilt limiting groove <NUM> of the pivot bracket <NUM>. Accordingly, when the pivot bracket <NUM> is tilted about the tilt shaft <NUM> in the up and down direction, the tilt limiter <NUM> relatively moves within the tilt limiting groove <NUM>.

One of the tilt limiter <NUM> and the tilt limiter <NUM> may be defined as a first tilt limiter, and the other may be defined as a second tilt limiter.

The module cover <NUM> may be formed in a round shape surrounding the swivel body <NUM>, and a through-hole <NUM> is formed on the rear surface of the module cover <NUM>. The swivel head <NUM> passes through the through-hole <NUM> and is connected to the connection unit <NUM>.

A fastening hole <NUM> is formed at the bottom of the module cover <NUM>, and a fastening screw <NUM> passes through the fastening hole <NUM> and is inserted into the bottom of the swivel body <NUM>, so that the module body <NUM> and the module cover <NUM> move singularly.

Referring to <FIG>, the swivel body <NUM> constituting the module body <NUM> may have a shape in which a portion of a front surface and an upper surface are opened.

The swivel body <NUM> includes a bottom portion <NUM>, a side portion <NUM> extending upward from both side ends of the bottom portion <NUM>, a rear portion <NUM> connecting a rear end of the bottom portion <NUM> and a rear end of the side portion <NUM>, and an upper portion <NUM> connecting the upper end of the side portion <NUM> and the upper end of the rear portion <NUM>.

A spring accommodation portion <NUM> is defined by the bottom portion <NUM>, the side portion <NUM>, the rear portion <NUM>, and the upper portion <NUM>, and the torsion spring <NUM> is accommodated in the spring accommodation portion <NUM>.

A spring catching groove 2511b is formed at one edge of the bottom portion <NUM>, and one end portion (lower end portion) of the torsion spring <NUM> is accommodated in the spring catching groove 2511b to be pressurized by the spring pressure protrusion <NUM>. In addition, the other end portion (upper end portion) of the torsion spring is caught on the lower surface of the upper portion <NUM>.

In addition, when the pivot bracket <NUM> is mounted on the swivel body <NUM>, the spring pressure protrusion <NUM> presses the lower end of the torsion spring <NUM>. Then, the lower end of the torsion spring <NUM> does not deviate from the spring catching groove 2511b.

In addition, a fastening hole 2511a is formed in the bottom portion <NUM>. The fastening screw <NUM> illustrated in <FIG> passes through the fastening hole <NUM> formed at the bottom of the module cover <NUM> and then is inserted into the fastening hole 2511a, thereby connecting the module body <NUM> and the fastening screw <NUM> are integrally coupled to each other.

A tilting shaft hole 2512a through which the tilting shaft <NUM> passes is formed at approximately the center of the side portion <NUM>, and a washer fixing hole 2512c is formed on a position facing each other with respect to the tilting shaft hole 2512a. A fixing protrusion protruding from an edge of the fixing washer w1 is inserted into the washer fixing hole 2512c.

A fixing protrusion <NUM> protrudes upward from the rear end of the upper portion <NUM>, and a support protrusion <NUM> (see a cross-sectional view of <FIG>) supporting both side surfaces of the fixing protrusion <NUM> on the rear surface of the module cover <NUM> protrudes forward, and thus it is possible to prevent the module body <NUM> from idling about the first horizontal axis (z-axis).

Meanwhile, the swivel head <NUM> may be formed in a cylindrical shape having a predetermined diameter and length, and a swivel shaft hole <NUM> is formed in the center. The swivel shaft hole <NUM> is defined as a vertical hole passing through the upper and lower surfaces of the swivel head <NUM>.

A swivel limiting groove <NUM> may be recessed to a predetermined depth on the rear surface of the swivel head <NUM>. The swivel limiting groove <NUM> may extend a predetermined length in a circumferential direction of the swivel head <NUM>.

In addition, a swivel limiting protrusion <NUM> (see <FIG>) to be described later is fitted to the swivel limiting groove <NUM>, so that the swivel head <NUM> rotates about a vertical axis by a set angle.

<FIG> is an exploded perspective view illustrating a connection unit constituting a display supporting apparatus according to an embodiment of the present disclosure, <FIG> is a rear perspective view illustrating the connection unit, and <FIG> is a longitudinal cross-sectional view illustrating the connection unit taken along line <NUM>-<NUM> in <FIG>.

Referring to <FIG>, the connection unit <NUM> according to the embodiment of the present disclosure may be defined as a connection means for rotatably connecting the swivel module <NUM> to the arm unit <NUM>.

In detail, the connection unit <NUM> may include a swivel head receiver <NUM> and a swivel shaft <NUM> passing through the swivel head receiver <NUM> in a vertical direction.

In addition, the connection unit <NUM> may further include an upper washer <NUM> and a lower washer <NUM> fitted to the swivel shaft <NUM>.

In addition, an upper fixing plate <NUM> and a lower fixing plate <NUM> into which the upper washer <NUM> and the lower washer <NUM> are respectively fitted may be further included. Insertion holes <NUM> and <NUM> into which the upper washer <NUM> and the lower washer <NUM> are respectively inserted are formed in the upper fixing plate <NUM> and the lower fixing plate <NUM>, respectively. Fixing protrusions <NUM> and <NUM> may protrude from one edge of each of the upper fixing plate <NUM> and the lower fixing plate <NUM>.

The connection unit <NUM> may further include a shaft cover <NUM> covering the swivel shaft <NUM>.

The connection unit <NUM> may further include a tilting shaft <NUM> passing through a side surface of the swivel head receiver <NUM>, and a tilting stopper <NUM>.

The tilting stopper <NUM> may include an upper tilting stopper 49a located above the tilting shaft <NUM> and a lower tilting stopper 49b located below the tilting shaft <NUM>.

A swivel head accommodation groove <NUM> accommodating the swivel head <NUM> of the swivel module <NUM> is formed inside the swivel head receiver <NUM>, and a rod guide hole <NUM> is formed on the front surface of the swivel head receiver <NUM>.

In a state where the swivel head <NUM> is accommodated in the swivel head accommodation groove <NUM>, the connecting rod <NUM> of the swivel module <NUM> passes through the rod guide hole <NUM>, and moves between one edge and the other edge of the rod guide hole <NUM>.

A shaft through-hole <NUM> is formed on the upper surface and bottom of the swivel head receiver <NUM>. The swivel shaft <NUM> is inserted into the shaft through-hole <NUM> at the upper side of the swivel head receiver <NUM>, and the lower end portion of the swivel shaft <NUM> is screwed into the through-hole <NUM> formed at the bottom of the swivel head receiver <NUM>.

In addition, a shaft cover seating groove 412b is formed on the upper surface of the swivel head receiver <NUM> where the shaft through-hole <NUM> is formed, and the shaft cover <NUM> is seated in the shaft cover seating groove 412b to shield the head portion of the swivel shaft <NUM>.

In addition, a pair of anti-interference grooves 412a are formed on an inner circumferential surface of the shaft through-hole <NUM> formed on the upper surface of the swivel head receiver <NUM>, so that, when the swivel shaft <NUM> is inserted into the shaft through-hole <NUM>, interference with the extension end protruding from the edge of the upper washer <NUM> can be prevented.

A swivel limiting protrusion <NUM> protrudes forward from the center of the inner surface of the swivel head receiver <NUM> corresponding to the rear surface of the swivel head accommodation groove <NUM>. When the swivel head <NUM> is completely inserted into the swivel head accommodation groove <NUM>, the swivel limiting protrusion <NUM> is inserted into the swivel limiting groove <NUM> formed on the rear surface of the swivel head <NUM>, and thus sets the rotation limit of the swivel head <NUM>.

In addition, fixing grooves <NUM> are recessed on the upper and lower sides of the swivel limiting protrusion <NUM>, respectively.

A process of coupling the swivel head <NUM> to the connection unit <NUM> is as follows.

First, the lower fixing plate <NUM> and the lower washer <NUM> are positioned at the bottom of the swivel head accommodation groove <NUM>, and the upper fixing plate <NUM> and the upper washer <NUM> are positioned on the upper surface of the swivel head <NUM>.

In this state, the swivel head <NUM> is pushed into the swivel head accommodation groove <NUM> so that the centers of the swivel shaft hole <NUM> and the shaft through-hole <NUM> coincide. In addition, the fixing protrusions <NUM> and <NUM> of the upper fixing plate <NUM> and the lower fixing plate <NUM> are inserted into the fixing groove <NUM>.

In this state, when the swivel shaft <NUM> is inserted into the shaft through-hole <NUM>, the swivel shaft <NUM> passes through by the upper fixing plate <NUM>, the upper washer <NUM>, the swivel shaft hole <NUM>, the lower washer <NUM> and thus is screwed to the bottom of the swivel head accommodation groove <NUM>. Then, the swivel head <NUM> becomes rotatable in the left and right direction about the swivel shaft <NUM>.

Finally, the shaft cover <NUM> is seated in the shaft cover seating groove 412b to block external exposure of the swivel shaft <NUM>.

Meanwhile, an inner cover contact surface <NUM> and a main link contact surface <NUM> may be formed on each of the left and right surfaces of the swivel head receiver <NUM> corresponding to the rear side of the swivel head accommodation groove <NUM>. The inner cover contact surface <NUM> may be formed on an upper side of the main link contact surface <NUM>.

As clearly illustrated in <FIG>, the inner cover contact surface <NUM> may be formed to be stepped at a predetermined depth from the side surface of the swivel head receiver <NUM> toward the center. In addition, the main link contact surface <NUM> may be formed to be more stepped from the inner cover contact surface <NUM> toward the center of the swivel head receiver <NUM>.

In addition, a catching protrusion 418a protrudes from the front end portion of the inner cover contact surface <NUM>, and the front end portion of the base cover <NUM> to be described later is caught, and thus the downward tilting range of the swivel head receiver <NUM> is limited.

In addition, through-holes passing through the swivel head receiver <NUM> in a second horizontal axis (x-axis) direction may be formed in the swivel head receiver <NUM> corresponding to the rear side of the swivel head accommodation groove <NUM>. In other words, the through-holes may be understood as horizontal holes passing through the left and right sides of the swivel head receiver <NUM>.

The through-holes may include a tilting shaft hole <NUM> passing through the center of the swivel head accommodation groove <NUM> and tilting stopper holes <NUM> respectively formed on upper and lower sides of the tilting shaft hole <NUM>.

The tilting stopper hole <NUM> may include an upper tilting stopper hole 416a and a lower tilting stopper hole 416b.

The upper tilting stopper 49a is inserted into the upper tilting stopper hole 416a, the lower tilting stopper 49b is inserted into the lower tilting stopper hole 416b, and the tilting shaft <NUM> is inserted into the tilting shaft hole <NUM>.

In addition, the connection unit <NUM> may be tilted at a predetermined angle in an up and down direction about the tilting shaft <NUM>.

In addition, a shaft groove 410a is recessed on the rear surface of the swivel head receiver <NUM> to prevent interference between the front end portion of the spring shaft <NUM> and the swivel head receiver <NUM>, which will be described later.

<FIG> is a front perspective view illustrating an outer cover constituting an arm unit according to an embodiment of the present disclosure, and <FIG> is a bottom perspective view illustrating the outer cover.

Referring to <FIG> and <FIG>, the outer cover <NUM> according to the embodiment of the present disclosure may be formed in a form in which a bottom portion and a front portion are opened.

In detail, the outer cover <NUM> may include an upper portion <NUM>, two side portions <NUM> extending downward from left and right edges of the upper portion <NUM>, and a rear portion <NUM> extending downward from a rear end of the upper portion <NUM>.

The rear portion <NUM> connects the rear end of one of the two side portions <NUM> to the rear end of the other, but may extend to be rounded with a predetermined curvature.

In addition, the front end of the side portion <NUM> is convexly rounded with a predetermined curvature, and as illustrated in <FIG>, the front end portion of the inner cover contact surface <NUM> on which the catching protrusion 418a is formed has the same curvature. It can be formed to be rounded with the same curvature.

Therefore, when the swivel head receiver <NUM> is tilted in the up and down direction, the front end portion of the outer cover <NUM> does not interfere with the front end portion of the inner cover contact surface <NUM>.

However, catching jaws <NUM> protrude from left and right edges of the front end portion of the outer cover <NUM> toward the center of the outer cover <NUM> to limit the upward tilting angle of the swivel head receiver <NUM>.

In detail, the swivel head receiver <NUM> may be tilted upward until the catching jaw <NUM> comes into contact with the upper surface of the catching protrusion 418a.

In addition, an interference prevention groove <NUM> is formed at the front end of the outer cover <NUM> to be recessed or stepped, so that when the swivel head receiver <NUM> is tilted upward, a phenomenon that the swivel head receiver <NUM> is interfered with the outer cover <NUM> is prevented.

In another aspect, it can be described that the side portion <NUM> of the outer cover <NUM> further extends forward from the front end of the upper portion <NUM>, and the front end of the side portion <NUM> is curved with a predetermined curvature.

In addition, it can be described as being tilted upward until the upper surface of the swivel head receiver <NUM> contacts the front end of the upper portion <NUM>. When the upper surface of the swivel head receiver <NUM> touches the front end of the upper portion <NUM>, the catching jaw <NUM> may be designed to contact the catching protrusion 418a of the swivel head receiver <NUM>.

Meanwhile, a guide hole <NUM> is formed in the center of the upper portion <NUM> of the outer cover <NUM>, and the guide hole <NUM> extends a predetermined length from the front end to the rear end of the outer cover <NUM>.

A spring force display portion <NUM> displaying the degree of compression of the spring may be provided in the form of numbers on the left and/or right edges of the guide hole <NUM>.

A plurality of side catching protrusions <NUM> may be formed on an inner surface of the side portion <NUM> of the outer cover <NUM>, and a rear catching protrusion <NUM> may be formed on an inner surface of the rear portion <NUM>.

In addition, a spring shaft hole <NUM> may be formed in the center of the rear surface portion <NUM>.

<FIG> is a perspective view illustrating an inner cover constituting an arm unit according to an embodiment of the present disclosure.

Referring to <FIG>, the inner cover <NUM> constituting the arm unit according to the embodiment of the present disclosure, like the outer cover <NUM>, may include an upper portion <NUM> extending to a predetermined width and length, a pair of side portions <NUM> extending downward from both side ends of the upper portion.

In detail, the side portion <NUM> may extend forward more than the front end of the upper portion <NUM>, and the front end portion of the side portion <NUM> may be formed to be rounded with a predetermined curvature.

In addition, the side portion <NUM> may extend more backward than the rear end of the upper portion <NUM>, and the rear end portion of the side portion <NUM> may also be formed to be rounded with a predetermined curvature.

Here, the portion of the side portion <NUM> that extends forward more than the front end of the upper portion <NUM> may be defined as the front extension portion 322a, and a portion of the side portion <NUM> that extends further backward than the rear end of the upper portion <NUM> may be defined as a rear extension portion 322b.

A guide hole <NUM> is formed at any point of the upper portion <NUM> corresponding to a direct lower side of the guide hole <NUM> formed in the outer cover <NUM>.

A fixing protrusion hole <NUM> and a fastening hole <NUM> may be respectively formed on the left and right sides of the guide hole <NUM>. The fixing protrusion hole <NUM> and the fastening hole <NUM> may be spaced apart from each other in the front and rear direction of the upper portion <NUM>.

A plurality of side catching holes <NUM> are formed at the lower end of the side portion <NUM>, and the side catching protrusions <NUM> formed on the outer cover <NUM> are inserted.

A tilting shaft hole <NUM> is formed in the front extension portion 322a and the rear extension portion 322b. The tilting shaft hole <NUM> may include a forward tilting shaft hole 329a formed in the front extension portion 322a and a rear tilting shaft hole 329b formed in the rear extension portion 322b. The tilting shaft <NUM> constituting the connection unit <NUM> is inserted into the front tilting shaft hole 329a.

In addition, a forward tilt limiting portion <NUM> and a rear tilt limiting portion <NUM> may be formed on the front extension portion 322a and the rear extension portion 322b, respectively.

The forward tilt limiting portion <NUM> may include an upper limiting hole 327a and a lower limiting groove 327b. The upper limiting hole 327a extends in an arc shape with a predetermined length from the upper side of the forward tilting shaft hole 329a. The lower limiting groove 327b is formed on the lower side of the front tilting shaft hole 329a and may be recessed upward by a predetermined depth from the lower end of the front extension portion 322a.

The upper tilting stopper 49a constituting the connection unit <NUM> is inserted into the upper limiting hole 327a, and the end portion of the lower tilting stopper 49b constituting the connection unit <NUM> is accommodated into the lower limiting groove 327b. Accordingly, the swivel head receiver <NUM> may be tilted up and down by the length of the upper limiting hole 327a.

Meanwhile, the rear tilt limiting portion <NUM> may include an upper limiting hole 328a and a lower limiting groove 328b.

The length of the upper limiting hole 327a may be set to be different from the length of the upper limiting hole 328a. Similarly, the length of the lower limiting groove 327b may be set to be different from the length of the lower limiting groove 328b.

<FIG> is a partial perspective view illustrating a connection state between a connection unit and an arm unit.

Referring to <FIG>, the connection unit <NUM> is capable of tilting by a predetermined angle θ1 (first set angle) in the up and down direction while connected to the front end of the arm unit <NUM>, and the angle θ1 may be understood as an angle from the front end portion to the rear end portion of the upper limiting hole 327a with the front tilting shaft hole 329a as the center.

In addition, the arm unit <NUM> can be rotated or tilted by a predetermined angle θ2 (second set angle) in the up and down direction while being connected to the upper end of the neck unit <NUM>. The angle θ2 may be understood as an angle from the front end portion to the rear end portion of the upper limiting hole 328a with the rear tilting shaft hole 329b as the center.

<FIG> is a perspective view illustrating a spring supporting bracket constituting an arm unit according to an embodiment of the present disclosure.

Referring to <FIG>, a spring supporting bracket <NUM> according to an embodiment of the present disclosure includes a vertical portion <NUM> and a horizontal portion <NUM> bent backward from an upper end of the vertical portion <NUM>.

A guide groove <NUM> is formed at the center of the horizontal portion <NUM> and, in detail, the guide groove <NUM> extends a predetermined length forward from the rear end of the horizontal portion <NUM>.

The spring supporting bracket <NUM> is mounted on the upper surface of the inner cover <NUM>, and the guide groove <NUM> is aligned with the guide hole <NUM> which is formed on the upper surface of the inner cover <NUM> in a state of being mounted on the upper surface of the inner cover <NUM>. In other words, the front end portions of the guide groove <NUM> and the guide hole <NUM> are placed on the same vertical plane.

In the horizontal portion <NUM>, a fixing protrusion <NUM> inserted into the fixing protrusion hole <NUM> of the inner cover <NUM> may protrude, and the fastening hole <NUM> aligned with the fastening hole <NUM> of the inner cover <NUM> is formed.

In a state where the fixing protrusion <NUM> is inserted into the fixing protrusion hole <NUM> and the mounting position is determined, the fastening member S passes through the fastening hole <NUM> of the inner cover <NUM> and the fastening holes <NUM> of the spring supporting bracket <NUM> in turn. Then, the spring supporting bracket <NUM> can be fixed to the lower surface of the upper portion <NUM> of the inner cover <NUM>.

In addition, a shaft hole <NUM> may be formed in the vertical portion <NUM> of the spring supporting bracket <NUM>. A front end portion of a spring shaft <NUM> to be described later is inserted into the shaft hole <NUM>.

<FIG> is a perspective view illustrating an elastic adjustment body constituting an arm unit according to an embodiment of the present disclosure, and <FIG> is an exploded perspective view illustrating the elastic adjustment body.

Referring to <FIG> and <FIG>, the elastic adjustment body <NUM> according to an embodiment of the present disclosure may include a spring shaft <NUM> and one or more coil springs <NUM> fitted to the outer circumferential surface of the spring shaft <NUM>, a spring supporter <NUM> fitted to the spring shaft <NUM> to support the front end of the coil spring <NUM>, and a spring pusher <NUM> fitting into the spring shaft <NUM> and supporting the rear end portion of the coil spring. The coil spring <NUM> includes a compression spring.

A screw thread <NUM> is formed on the outer circumferential surface of the spring shaft <NUM>, and the screw thread may start from the front end portion of the spring shaft <NUM> and extend toward the rear end portion by a predetermined length.

The lower end of the spring pusher <NUM> is connected to an auxiliary link <NUM> to be described later, so that when the arm unit <NUM> is tilted in the up and down direction, the coil spring <NUM> is reduced or expanded while the arm units <NUM> is tilting in the up and down direction.

In addition, a wrench groove is formed on the rear surface of the spring shaft <NUM>, so that the assembler can rotate the spring shaft <NUM> in the clockwise direction or in the counterclockwise direction using a wrench. As the spring shaft <NUM> rotates in the clockwise direction or in the counterclockwise direction, the spring supporter <NUM> advances or retreats along the spring shaft <NUM> and contracts or extends the coil spring <NUM>.

In detail, the spring force of the coil spring <NUM> is adjusted according to the position of the spring supporter <NUM>. In other words, as the spring supporter <NUM> moves toward the rear end portion of the spring shaft <NUM>, the coil spring <NUM> is compressed and the spring force increases. Accordingly, the assembler can adjust the spring force of the coil spring <NUM> by moving the spring supporter <NUM> to an appropriate position according to the size or load of the display panel D.

<FIG> is a rear perspective view illustrating the spring supporter constituting the elastic adjustment body.

Referring to <FIG>, the spring supporter <NUM> may include a supporter body <NUM> having a shaft hole <NUM> formed in the center, and a shaft sleeve <NUM> extending a predetermined length from the rear surface of the supporter body <NUM>.

The spring shaft <NUM> passes through the shaft sleeve <NUM> and is fitted to the shaft hole <NUM>.

The spring supporter <NUM> may further include a guide protrusion <NUM> extending a predetermined length from an upper surface of the supporter body <NUM>.

The guide protrusion <NUM> sequentially passes through the guide groove <NUM> of the spring supporting bracket <NUM>, the guide hole <NUM> of the inner cover <NUM>, and the guide hole <NUM> of the outer cover <NUM>. In addition, the guide protrusion <NUM> moves forward or backward within the guide hole <NUM> to adjust the spring force, and it is possible to check how much the coil spring <NUM> is compressed through the spring force display portion <NUM>.

The spring supporter <NUM> may further include a plurality of spring support ribs <NUM> extending backward from an edge of the supporter body <NUM>. The spring support rib <NUM> contacts an outer circumferential surface of the coil spring <NUM> and stably supports an end portion of the coil spring <NUM>.

<FIG> is a rear perspective view illustrating a spring pusher constituting an elastic adjustment body.

Referring to <FIG> and <FIG>, a shaft hole <NUM> is formed at the center of the spring pusher <NUM>, and the spring shaft <NUM> passes through the shaft hole <NUM>.

An auxiliary link insertion groove <NUM> is formed in the spring pusher <NUM>, and the auxiliary link insertion groove <NUM> extends from the lower end of the spring pusher <NUM> to the shaft hole <NUM>.

A pin hole <NUM> is formed on the lower side of the spring pusher <NUM>, and the pin hole <NUM> passes through both side surfaces of the spring pusher <NUM> and the auxiliary link insertion groove <NUM>.

A front connection pin (P1: see <FIG>) to be described later passes through the pin hole <NUM> and the auxiliary link <NUM> inserted into the auxiliary link insertion groove <NUM>. Thus, the spring pusher <NUM> and the auxiliary link <NUM> move singularly. In addition, when the arm unit <NUM> tilts in the up and down direction, the upper end of the auxiliary link <NUM> tilts in the vertical direction so that the spring pusher <NUM> moves forward or backward along the spring shaft <NUM>.

<FIG> is a perspective view illustrating a coupling state of a main link and an auxiliary link constituting an arm unit according to an embodiment of the present disclosure.

Referring to <FIG>, the main link <NUM> according to an embodiment of the present disclosure may include a bottom portion <NUM> and side portions <NUM> extending upward from both side ends of the bottom portion <NUM>.

The side portion <NUM> extends forward more than the front end portion of the bottom portion <NUM>, and the front end portion of the side portion <NUM> is located at a point farther forward than the front end portion of the bottom portion <NUM>.

In addition, the side portion <NUM> extends further backward than the rear end portion of the bottom portion <NUM>, and the rear end portion of the side portion <NUM> is located at a point spaced apart from the rear end portion of the bottom portion <NUM>.

The lower tilting stopper (49b: see <FIG>) sequentially passes through one of the pair of side portions <NUM> and the other of the swivel head receiver <NUM> and the pair of side portions <NUM> to connect the swivel head receiver <NUM> and the front end portion of the main link <NUM>.

A lower tilting stopper S2 is inserted through the rear end of the side portion <NUM>. In addition, the upper tilting stopper S1 passes through the upper limiting hole 328a of the inner cover and the link coupler <NUM> to be described later.

In addition, the pair of tilting shafts S3 are inserted into the link coupler <NUM> through the rear tilting shaft hole 329b formed in the rear extension portion 322b of the inner cover <NUM>. In detail, one of the pair of tilting shafts S3 is inserted into the link coupler <NUM> through the rear tilting shaft hole 329b formed in the left side portion <NUM> of the inner cover <NUM>, and the other one is inserted into the link coupler <NUM> through the rear tilting shaft hole 329b formed in the right side portion <NUM> of the inner cover <NUM>.

Meanwhile, the front connecting pin (P1) passes through the front end portion of the auxiliary link <NUM>, and both end portions are inserted into the two side portions <NUM>. A point where the front connection pin P1 is connected to the side portion <NUM> may be a point spaced upward from the vicinity of the rear end portion of the bottom portion <NUM>.

In addition, an auxiliary link avoidance groove <NUM> may be formed at the center of the rear end portion of the bottom portion <NUM>. The auxiliary link avoidance groove <NUM> extends forward by a predetermined length from the rear end of the bottom portion <NUM>, so that when the arm unit <NUM> is tilted in the up and down direction, the auxiliary link <NUM> and the bottom portion <NUM> is prevented from being interfered with each other.

<FIG> is a perspective view illustrating a base cover constituting an arm unit according to an embodiment of the present disclosure.

Referring to <FIG>, a base cover <NUM> according to an embodiment of the present disclosure includes a cover body <NUM>, side hooks <NUM> protruding from left and right edges of the cover body <NUM>, and a rear hook <NUM> protruding from the rear end portion of the cover body <NUM>.

The side hook <NUM> passes through the side catching hole <NUM> formed on the side surface of the inner cover <NUM> and is caught on the side catching protrusion <NUM> formed on the side surface of the outer cover <NUM>.

A link coupler through-hole <NUM> is formed on the rear side of the cover body <NUM>, and a guide sleeve <NUM> extends upward from an edge of the link coupler through-hole <NUM>.

The guide sleeve <NUM> may extend obliquely in a form in which an inner diameter thereof decreases toward the upper side.

An auxiliary link avoidance groove <NUM> may be formed in the guide sleeve <NUM>, and a line bisecting the width of the cover body <NUM> may coincide with a line bisecting the auxiliary link avoidance groove <NUM>.

In addition, an interference prevention groove <NUM> may be recessed to a predetermined depth in the cover body <NUM>. The interference prevention groove <NUM> has a width smaller than the width of the cover body <NUM> and is recessed to a predetermined depth, so that when the connection unit <NUM> is tilted in the vertical direction, the connection unit prevents interference with the swivel head receiver <NUM>.

The front end portion of the cover body <NUM> is rounded upward, and the swivel head receiver <NUM> may be tilted downward until the front end portion of the cover body <NUM> is caught on the catching protrusion 418a (see <FIG>).

A cable guide rib <NUM> may be formed at any point of the cover body <NUM>. The cable guide rib <NUM> may be formed by cutting a portion of the cover body <NUM> in the form of <NUM> in the width direction of the cover body <NUM> and then bending it downward.

In addition, by allowing the cable to pass through the space formed inside the cable guide rib <NUM>, it is possible to minimize a phenomenon in which the cable extending from the display panel D droops downward due to its own weight.

<FIG> is a perspective view illustrating a link coupler constituting a neck unit according to an embodiment of the present disclosure, and <FIG> is a longitudinal cross-sectional view illustrating the link coupler taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG> and <FIG> together with <FIG>, the link coupler <NUM> constituting the neck unit <NUM> according to the embodiment of the present disclosure may be understood as a means for rotatably supporting the rear end portion of the arm unit <NUM>.

In detail, the link coupler <NUM> includes a cylindrical coupler body <NUM>, and a swivel shaft accommodation groove <NUM> is formed inside the coupler body <NUM>.

The swivel shaft accommodation groove <NUM> extends a predetermined length upward from the bottom of the coupler body <NUM> and has a diameter corresponding to the outer diameter of the swivel shaft <NUM> to be described later.

A fastening hole <NUM> extends in a horizontal direction at a point spaced apart by a predetermined length upward from the bottom of the coupler body <NUM>. A fastening member inserted into the fastening hole <NUM> passes through the swivel shaft <NUM> and fixes the swivel shaft <NUM> to the link coupler <NUM>.

In addition, an auxiliary link insertion port <NUM> is formed in the coupler body <NUM>. In detail, the auxiliary link insertion port <NUM> extends a predetermined length backward from the outer circumferential surface of the coupler body <NUM> and communicates with the upper end portion of the swivel shaft accommodation groove <NUM>.

The auxiliary link insertion port <NUM> is inclined in a form in which the width thereof becomes narrower toward the rear end. Specifically, the longitudinal section of the auxiliary link insertion port <NUM> may be formed in a vertically symmetrical shape based on a horizontal plane bisecting the inlet of the auxiliary link insertion port <NUM>. Accordingly, the auxiliary link <NUM> can rotate in the up and down direction within the auxiliary link insertion hole <NUM> by an angle α1 between the upper and lower surfaces of the auxiliary link insertion port <NUM>.

A spring shaft insertion port <NUM> is formed in the link coupler <NUM> corresponding to the upper side of the auxiliary link insertion port <NUM>.

The spring shaft insertion port <NUM> is formed to a length from the front surface to the rear surface of the link coupler <NUM> and completely passes through the link coupler <NUM> in the transverse direction.

In addition, the spring shaft <NUM> of the elastic adjustment body <NUM> is inserted into the spring shaft insertion port <NUM> and tilted in the up and down direction by a predetermined angle. Thus, the tilting center of the spring shaft <NUM> is formed inside the spring shaft insertion port <NUM>.

The spring shaft insertion port <NUM> has a shape whose cross-sectional area changes based on the tilting center.

In detail, from the outer circumferential surface of one side of the link coupler <NUM> to the center of the tilting, the longitudinal cross-sectional area is formed inclined in a decreasing form, and from the center of the tilting to the outer circumferential surface of the other side of the link coupler <NUM>, the longitudinal cross-sectional area is formed to be inclined in an increasing form.

In other words, the spring shaft insertion port <NUM> has a longitudinal cross-sectional shape when two truncated cones lying down meet at the center of the tilting. Accordingly, the spring shaft <NUM> can be tilted in the up and down direction within the spring shaft insertion port <NUM> within a range reaching the upper and lower surfaces of the spring shaft insertion port <NUM>.

A pair of main link seating surfaces <NUM> are recessed on the outer circumferential surface of the link coupler <NUM>. In detail, the pair of main link seating surfaces <NUM> may be formed to be stepped at a predetermined depth in a direction where they face each other and become closer to each other.

The main link seating surface <NUM> is a surface on which the rear end portion of the side portion <NUM> of the main link <NUM> is rotatably seated, and may be formed to be stepped by the thickness of the rear end portion of the side portion <NUM>.

In addition, a plurality of holes extending in a horizontal direction intersecting the extension direction of the spring shaft insertion port <NUM> or the auxiliary link insertion port <NUM> are formed in the link coupler <NUM>.

The plurality of holes may include a lower tilting stopper hole <NUM> formed on the main link seating surface <NUM>, a rear connection pin hole <NUM> formed at a point corresponding to the lower side of the lower tilting stopper hole <NUM>, a tilting shaft hole <NUM> formed at a point corresponding to the upper side of the lower tilting stopper hole <NUM>, an upper tilting stopper hole <NUM> formed on the upper side of the tilting shaft hole <NUM>, and a fastening hole <NUM> formed at any point corresponding to the lower side of the rear connection pin hole <NUM>.

The rear connection pin P2 illustrated in <FIG> is inserted into the rear connection pin hole <NUM> and functions as a rotation center of the auxiliary link <NUM>. In addition, the lower tilting stopper S2 is inserted into the lower tilting stopper hole <NUM> and functions as a rotation center of the main link <NUM>.

In a state where the rear end of the side portion <NUM> of the main link <NUM> is seated on the main link seating surface <NUM>, the side portion <NUM> can be tilted by a predetermined angle β between the upper and lower surfaces of the main link seating surface <NUM> in the up and down direction.

In addition, referring to <FIG>, the tilting shaft S3 is inserted into the tilting shaft hole <NUM> and functions as a rotation center of the inner cover <NUM>. The upper tilting stopper S1 is inserted into the upper tilting stopper hole <NUM> to set the tilting limit θ2 of the arm unit <NUM>.

In addition, a fastening pin S to be described in <FIG> is inserted into the fastening hole to singularly connect the swivel shaft <NUM> and the link coupler <NUM>.

Meanwhile, a limiting protrusion <NUM> protrudes from the lower end portion of the link coupler <NUM> to limit the amount of rotation of the link coupler <NUM> in the left and right direction. In detail, the link coupler <NUM> is provided to be rotatable about a vertical axis (y axis), but the amount of rotation in the left and right direction about the vertical axis is limited by the limiting protrusion <NUM>.

<FIG> is an exploded perspective view illustrating a swivel shaft and a swivel bushing constituting a neck unit according to an embodiment of the present disclosure.

Referring to <FIG>, the neck unit <NUM> according to an embodiment of the present disclosure may include a swivel shaft <NUM>, a swivel bushing <NUM> fitted to the outer circumferential surface of the lower end portion of the swivel shaft <NUM>, and a swivel bushing pin <NUM> passing through the swivel bushing <NUM> in a tangential direction.

The lower end of the link coupler <NUM> and the upper end of the upper pillar <NUM> to be described later are assembled by contacting each other, and a bearing <NUM> may be interposed at the contacting portion. By being provided in the bearing <NUM>, when the link coupler <NUM> rotates about a vertical axis, frictional force due to contact with the upper pillar <NUM> can be minimized.

An auxiliary link seating end <NUM> may be formed at an upper end of the swivel shaft <NUM>. The auxiliary link seating end <NUM> is a portion where the rear end of the auxiliary link <NUM> is seated, and it is necessary to minimize interference and friction with the auxiliary link <NUM>. Therefore, the auxiliary link seating end <NUM> may be formed to be rounded in a shape corresponding to a trajectory generated when the rear end of the auxiliary link <NUM> rotates.

In addition, a fastening hole <NUM> is formed at a point spaced downward from the upper end of the swivel shaft <NUM>. The fastening hole <NUM> is a hole into which a fastening pin S for connecting the link coupler <NUM> and the swivel shaft <NUM> is inserted. Therefore, the fastening pin S passes through the fastening hole <NUM> of the link coupler <NUM> and is inserted into the fastening hole <NUM>. By the fastening pin S, the link coupler <NUM> and the swivel shaft <NUM> rotate singularly.

At a point spaced upward from the lower end portion of the swivel shaft <NUM>, a bushing pin catching groove <NUM> is recessed to a predetermined depth. The bushing pin catching groove <NUM> is formed in the circumferential direction of the swivel shaft <NUM>.

A pin insertion hole <NUM> is formed at a point spaced apart from the lower end of the swivel bushing <NUM> upward. The pin insertion hole <NUM> extends a predetermined length in the circumferential direction of the swivel bushing <NUM> so that the swivel bushing pin <NUM> can be inserted into the swivel bushing <NUM> in a tangential direction.

The formation height of the pin insertion hole <NUM> is formed at the same point as the formation height of the bushing pin catching groove <NUM>, so that when the swivel bushing pin <NUM> is inserted into the pin insertion hole <NUM>, the swivel bushing pin <NUM> is also fitted to the bushing pin catching groove <NUM> at the same time.

Therefore, the swivel bushing <NUM> is singularly combined with the swivel shaft <NUM> by the swivel bushing pin <NUM>. In addition, in a state where the swivel bushing <NUM> is fixed, the swivel shaft <NUM> is rotatable about a vertical axis with respect to the swivel bushing <NUM>.

In addition, the swivel bushing pin <NUM> is inserted into the pin insertion hole <NUM> through the bushing pin insertion hole <NUM> (see <FIG>) formed in the upper pillar <NUM>. Therefore, the swivel shaft <NUM> and the swivel bushing <NUM> are not separated from the upper pillar <NUM> by the swivel bushing pin <NUM>. In addition, the swivel shaft <NUM> is rotatable about a vertical axis with respect to the upper pillar <NUM>.

<FIG> and <FIG> are cross-sectional views illustrating an operating state of an arm unit constituting a display supporting apparatus according to an embodiment of the present disclosure.

Referring to <FIG> and <FIG>, the arm unit <NUM> can tilt in the up and down direction about a second horizontal axis (x-axis) in a state of being connected to the neck unit <NUM>, and the neck unit <NUM> is rotatable about a vertical axis with respect to the pillar unit <NUM>.

In detail, when the arm unit <NUM> is tilted upward, the spring pusher <NUM> connected to the auxiliary link <NUM> moves backward to the rear end of the spring shaft <NUM> and tensions the coil spring <NUM>.

Conversely, when the arm unit <NUM> tilts downward, the spring pusher <NUM> compresses the coil spring <NUM> while moving forward to the front end of the spring shaft <NUM>.

At this time, when an assembler mounts a wrench <NUM> (to be described later) on the rear surface of the spring shaft <NUM> to rotate the spring shaft <NUM>, the spring supporter <NUM> moves forward or backward along the spring shaft <NUM>.

If the size and load of the display panel D are large, the spring supporter <NUM> may rotate the spring shaft <NUM> in a direction in which the spring shaft <NUM> moves backward to the rear end of the spring shaft <NUM>. Then, the coil spring <NUM> is compressed to increase the spring force, and the increased spring force can prevent the display panel D from drooping downward due to own weight thereof.

While only one type of display panel can be mounted on a conventional display supporting apparatus in which the spring force of the coil spring <NUM> cannot be adjusted, the display supporting apparatus according to the present disclosure capable of adjusting the spring force of the coil spring <NUM> has the advantage of being able to support display panels of various sizes.

For example, when the spring supporter <NUM> moves backward and the coil spring <NUM> is compressed more than the basic state, the restoring force to return to the basic state increases, and the spring force corresponding to the force required to compress the spring increases. Here, the basic state means a state where the arm unit <NUM> maintains a horizontal state.

Accordingly, when the display panel is lifted to a higher position than the horizontal state as illustrated in <FIG>, the coil spring <NUM> extends, so the display panel can be lifted upward with relatively little force.

In addition, when the display panel D descends to a horizontal position, since frictional force acts between the upper surface of the spring pusher <NUM> and the upper surface of the inner cover <NUM>, it is possible to prevent the display panel D from rapidly descending.

In addition, when the display panel d descends from the horizontal position to a lower power, little frictional force acts between the spring pusher <NUM> and the inner cover <NUM>, and only the restoring force of the coil spring <NUM> acts.

In addition, since the coil spring <NUM> is a compression spring, even if the load of the display panel D acts downward, the restoring force of the coil spring <NUM> acts as resistance, and thus rapid descent of the display panel D may be prevented.

In addition, by increasing the amount of compression of the coil spring <NUM> in proportion to the load of the display panel D mounted on the display supporting apparatus <NUM>, even if the display panel D having a heavy load is mounted, the present disclosure has the advantage of minimizing the rapid drop of the display panel D.

<FIG> is an exploded perspective view illustrating a pillar unit constituting a display supporting apparatus according to an embodiment of the present disclosure, and <FIG> is a longitudinal cross-sectional view illustrating the pillar unit taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG> and <FIG>, the pillar unit <NUM> constituting the display supporting apparatus <NUM> according to the embodiment of the present disclosure may include an upper pillar <NUM> and a lower pillar <NUM> supporting the upper pillar <NUM>.

In detail, the pillar unit <NUM> may further include a center shaft <NUM>. Approximately the lower half of the center shaft <NUM> is inserted into the lower pillar <NUM> and the upper half is inserted into the upper pillar <NUM>.

The pillar unit <NUM> may further include a bushing <NUM> fitted to an outer circumferential surface of the center shaft <NUM>. The bushing <NUM> includes an upper bushing 69a and a lower bushing 69b. The upper bushing 69a can move up and down along the outer circumferential surface of the center shaft <NUM> together with the upper pillar <NUM>, and the lower bushing 69b is fixed at the center shaft <NUM> together with the lower pillar <NUM>.

The upper bushing 69a is accommodated in a hole formed inside the upper pillar <NUM>, and the lower bushing 69b is accommodated in a hole formed inside the lower pillar <NUM>.

As illustrated in <FIG>, the fastening member S including a screw is inserted only up to the upper pillar <NUM> and the upper bushing 69a, and only the upper pillar <NUM> and the upper bushing 69a are singularly coupled.

On the other hand, another fastening member S passes through the lower pillar <NUM> and the lower bushing 69b and is inserted into the center shaft <NUM>, so that the center shaft <NUM>, the lower bushing 69b, and the lower pillar <NUM> are singularly combined.

The pillar unit <NUM> may further include a height adjustment screw <NUM> inserted into an upper surface of the center shaft <NUM>. The height adjustment screw <NUM> passes through the upper surface of the upper pillar <NUM> and is inserted into the center shaft <NUM>. And, the height adjustment screw <NUM> is screwed to the center shaft <NUM>, and the height adjustment screw <NUM> is inserted into the center shaft <NUM> according to the rotation direction of the height adjustment screw <NUM>. or comes out to the outside of the center shaft <NUM>.

The pillar unit <NUM> may further include an rotation prevention shaft <NUM> that vertically penetrates the upper pillar <NUM> and is inserted into the lower pillar <NUM>. The rotation prevention shaft <NUM> couples the upper pillar <NUM> and the lower pillar <NUM>, so that in a state where the upper pillar <NUM> is seated on the lower pillar <NUM>, the rotation prevention shaft <NUM> is prevented from rotating in the left and right directions with the center shaft <NUM> as a central axis.

The pillar unit <NUM> may further include a pillar cover <NUM> covering a portion of the upper pillar <NUM> and the lower pillar <NUM>.

The upper pillar <NUM> is singularly combined with the height adjustment screw <NUM> and ascends upward from the lower pillar <NUM> according to the rotation direction of the height adjustment screw <NUM>, or may be descended toward the lower pillar <NUM>. At this time, the pillar cover <NUM> serves to block external exposure by shielding the separation space between the upper pillar <NUM> and the lower pillar <NUM>. In addition, when the upper pillar <NUM> ascends or descends, the pillar cover <NUM> serves to guide the upper pillar so that it does not shake.

The pillar unit <NUM> may further include a wrench <NUM> detachably mounted to the upper pillar <NUM>. The wrench <NUM> is used not only to rotate the spring shaft <NUM> of the elastic adjustment body <NUM> or to rotate the height adjustment screw <NUM>, but also as illustrated in <FIG>, and functions to press the cable C extending along the upper surface of the upper filler <NUM>.

The pillar unit <NUM> may further include a housing cover <NUM> covering a vertical portion of the upper pillar <NUM>, the pillar cover <NUM>, and the lower pillar <NUM> from top to bottom.

<FIG> is a front perspective view illustrating an upper pillar constituting a pillar unit according to an embodiment of the present disclosure, <FIG> is a rear perspective view illustrating the upper pillar, and <FIG> is a longitudinal cross-sectional view illustrating the upper pillar taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG>, the upper pillar <NUM> according to the embodiment of the present disclosure may include a vertical portion <NUM> and an extension portion <NUM> extending obliquely upward from the upper end of the vertical portion <NUM>.

In detail, the extension portion <NUM> may extend upward at an interior angle smaller than <NUM> degrees from a horizontal plane passing through the upper end of the vertical portion <NUM>. Here, a side edge of an upper end portion of the vertical portion <NUM> may be defined as a starting point of the extension portion <NUM>. In addition, the upper surface of the vertical portion <NUM> may be inclined at an angle corresponding to the inclination angle of the extension portion <NUM>.

The vertical portion <NUM> can be defined as consisting of a front surface that is convexly rounded with a predetermined curvature, a rear surface formed on the opposite side of the front surface and recessed to a predetermined depth, a pair of side surfaces connecting the front surface and the rear surface, and an inclined upper surface at a predetermined angle.

The rear surface of the vertical portion <NUM> is concavely recessed, so that a passage through which the cable C extending from the display panel D passes is formed between the rear portion and the rear surface of the housing cover <NUM>.

An upper surface of the vertical portion <NUM> may also be concavely rounded downward to form a cable guide groove <NUM> through which the cable C passes.

In addition, a height adjustment indicator <NUM> may be displayed on the rear surface of the vertical portion <NUM> in the form of scales and/or numbers.

A pillar cover seating portion <NUM> may be formed on a side surface of the vertical portion <NUM> to be stepped as much as the thickness of the pillar cover <NUM>.

A guide groove <NUM> is formed at a corner portion of the vertical portion <NUM> where the front and side surfaces meet to guide the sliding movement of the housing cover <NUM> in the up and down direction.

Inside the vertical portion, a shaft insertion hole <NUM> into which the rotation prevention shaft <NUM> is inserted, a center shaft insertion groove <NUM> into which the center shaft <NUM> is inserted, and a wrench accommodation groove <NUM> into which the wrench <NUM> is inserted are formed.

The shaft insertion hole <NUM> is formed with a length extending from the upper surface to the lower end of the vertical portion <NUM>.

The center shaft insertion groove <NUM> is formed at a point spaced apart from the shaft insertion hole <NUM> to the rear side and extends a predetermined length upward from the lower end of the vertical portion <NUM>.

An upper surface of the center shaft insertion groove <NUM> is defined by a partition plate <NUM>, and a screw insertion hole 6214a is formed in the partition plate <NUM>. Accordingly, the upper pillar <NUM> may descend until the upper surface of the center shaft <NUM> touches the partition plate <NUM>. The height adjustment screw <NUM> is inserted into the center shaft <NUM> through the screw insertion hole 6214a.

Arrows and guide letters indicating the loosening direction or tightening direction of the screw may be displayed on the upper surface of the vertical portion <NUM> corresponding to the outer edge of the screw insertion hole <NUM>.

An upper bushing seating surface <NUM> may be formed to be stepped on an inner circumferential surface of the center shaft insertion groove <NUM>. The upper bushing seating surface <NUM> may extend upward from the lower end of the vertical portion <NUM> by the length of the upper bushing 69a.

In addition, a fastening hole <NUM> is formed horizontally at a point spaced upward from the lower end of the vertical portion <NUM>, and the fastening hole <NUM> extends from the outer circumferential surface of the vertical portion <NUM> to the upper bushing seating surface <NUM>. Accordingly, the fastening member S passing through the fastening hole <NUM> is inserted into the upper bushing 69a.

The shaft insertion hole <NUM> may be formed with a length extending from the upper surface to the lower end of the vertical portion <NUM>. When the rotation prevention shaft <NUM> is inserted into the shaft insertion hole <NUM>, a portion of the lower end of the rotation prevention shaft <NUM> protrudes further from the lower end portion of the vertical portion <NUM> and is inserted into the upper surface of the lower pillar <NUM>.

Meanwhile, a cable through-hole <NUM> may be formed in the extension portion <NUM>. As illustrated, the cable through-hole <NUM> passes through the extension portion <NUM>, whrein the cable through-hole may be formed to be inclined backward from the lower surface of the extension portion <NUM> to the upper surface. According to this structure, the cable extending from the display panel D may extend along the cable guide groove <NUM> of the vertical portion <NUM> and the rear surface of the vertical portion <NUM> while a bending phenomenon of the cable is minimized.

A swivel shaft insertion hole <NUM> is formed at the front end of the extension portion <NUM>.

The swivel shaft insertion hole <NUM> may be recessed to a predetermined depth from the upper surface to the lower side of the extension portion <NUM>. A portion where the swivel shaft insertion hole <NUM> is formed may further protrude upward by a predetermined length from the upper surface of the extension portion <NUM>.

The link coupler <NUM> constituting the neck unit <NUM> is inserted into the swivel shaft insertion hole <NUM>.

A rotation limiting protrusion <NUM> protrudes from the inner circumferential surface of the swivel shaft insertion hole <NUM>.

Referring to <FIG> together, when the link coupler <NUM> is seated on the edge of the upper surface of the swivel shaft insertion hole <NUM>, the limiting protrusion <NUM> protruding from the lower end of the link coupler <NUM> interferes with the rotation limiting protrusion <NUM>.

In other words, the link coupler <NUM> may rotate in the clockwise direction or in the counterclockwise direction about a vertical axis until the limiting protrusion <NUM> is caught on the rotation limiting protrusion <NUM>.

In addition, a bushing pin insertion hole <NUM> into which a swivel bushing pin <NUM> (see <FIG>) is inserted is formed on the side of the extension portion <NUM>. The swivel bushing pin <NUM> passes through the bushing pin insertion hole <NUM> and is inserted into the pin insertion hole <NUM> of the swivel bushing <NUM>. In addition, a portion of the swivel bushing pin <NUM> is caught in the bushing pin catching groove <NUM> formed in the swivel shaft <NUM>.

<FIG> is a rear perspective view illustrating a pillar cover constituting a pillar unit according to an embodiment of the present disclosure.

Referring to <FIG>, the pillar cover <NUM> according to the embodiment of the present disclosure may be formed in the shape of a rectangular cylinder with an empty inside.

In detail, the pillar cover <NUM> surrounds the vertical portion <NUM> of the upper pillar <NUM> and the upper portion of the lower pillar <NUM>, so that a separation space formed between the lower end portion of the upper pillar <NUM> and the upper end portion of the lower pillar <NUM> is shielded.

The front surface of the pillar cover <NUM> may be convexly rounded with a predetermined curvature, and the cable guide surface <NUM> may be recessed on the rear surface thereof.

A catching hole <NUM> may be formed at a point spaced upward from a lower end portion of the rear surface of the pillar cover <NUM>.

<FIG> is a front perspective view illustrating a lower pillar constituting a pillar unit according to an embodiment of the present disclosure, <FIG> is a rear perspective view illustrating the lower pillar, <FIG> is a longitudinal cross-sectional view illustrating the lower pillar taken along line <NUM>-<NUM> in <FIG>, and <FIG> is a cross-sectional view illustrating the lower pillar taken along line <NUM>-<NUM> in <FIG>.

Referring to <FIG>, the front surface of the lower pillar <NUM> according to the embodiment of the present disclosure may be convexly rounded with a predetermined curvature, and the cable guide groove <NUM> may be recessed to a predetermined depth on the rear surface.

A protrusion portion <NUM> protrudes from a lower end of the rear surface of the lower pillar <NUM>, and the cable guide surface <NUM> may extend from an upper surface of the lower pillar <NUM> to an upper surface of the protrusion portion <NUM>.

A center shaft insertion hole <NUM> and a shaft insertion groove <NUM> may be formed inside the lower pillar <NUM>.

The center shaft insertion hole <NUM> is formed to a length from the upper surface to the lower surface of the lower pillar <NUM> and passes through the lower pillar <NUM>.

The shaft insertion groove <NUM> is recessed to a predetermined depth at a point spaced forward from the center shaft insertion hole <NUM>, and a screw thread may be formed on an inner circumferential surface thereof. In addition, an end portion of the rotation prevention shaft <NUM> inserted into the upper pillar <NUM> is screwed into the shaft insertion groove <NUM>.

A pillar cover seating surface <NUM> may be formed to be stepped on an outer circumferential surface of the lower pillar <NUM> to a depth corresponding to the thickness of the pillar cover <NUM>.

The pillar cover seating surface <NUM> has a predetermined width at the upper end of the lower pillar <NUM> and is surrounded by an outer circumferential surface of the lower pillar <NUM>. The lower portion of the pillar cover <NUM> is fitted to the pillar cover seating surface <NUM>.

A catching protrusion <NUM> protrudes from the rear surface of the lower pillar <NUM>, and the catching protrusion <NUM> is inserted into the locking hole <NUM> of the pillar cover <NUM>.

A fastening hole <NUM> is formed on the rear surface of the lower pillar <NUM> corresponding to a point spaced downward from the catching protrusion <NUM> toward the center of the lower pillar <NUM>.

A lower bushing seating surface <NUM> stepped at a predetermined depth in the radial direction from the inner circumferential surface of the center shaft insertion hole <NUM> and extended to a length corresponding to the length of the lower bushing 69b is formed inside the lower pillar <NUM>. The fastening hole <NUM> is formed through the lower bushing seating surface <NUM>.

In addition, a support boss seating surface <NUM> is formed from the lower end of the lower bushing seating surface <NUM> to a predetermined depth in the radial direction and extends to the lower end portion of the lower pillar <NUM>.

The support boss seating surface <NUM> has the same shape as the outer shape of the support boss <NUM> (see <FIG>) of the clamp body <NUM> to be described later.

In addition, a rotation limiting protrusion <NUM> protrudes from a lower end of the lower bushing seating surface <NUM> to limit rotation amount of the pillar unit <NUM> about a vertical axis. The operation of the rotation limiting protrusion <NUM> will be described again together with the contents of the clamp unit <NUM>.

<FIG> is a partially enlarged perspective view of the pillar unit illustrating a state of adjusting the height of the upper pillar.

Referring to <FIG>, as described above, as the height adjustment screw <NUM> is rotated in one direction, the upper pillar <NUM> ascends or descends along with the height adjustment screw <NUM>, and the height of the display panel D is adjustable.

As the upper pillar <NUM> ascends, the height adjustment indicator <NUM> covered by the pillar cover <NUM> is exposed to the outside. In addition, the housing cover <NUM> may be mounted in a state where the upper pillar <NUM> ascends to a desired height, so that the height adjustment indicator <NUM> may be shielded.

<FIG> is a perspective view illustrating a height adjustment module constituting a pillar unit according to an embodiment of the present disclosure, <FIG> is an exploded perspective view illustrating the height adjustment module, and <FIG> is a longitudinal cross-sectional view illustrating the height adjustment module taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG>, the height adjustment module constituting the pillar unit <NUM> according to the embodiment of the present disclosure may include a center shaft <NUM>, a bushing <NUM> fitted to the outer circumferential surface of the center shaft <NUM>, and a height adjustment screw <NUM> inserted downward from the upper surface of the center shaft <NUM>.

An upper bracket K1 and a lower bracket K2 may be mounted on the outer circumferential surface of the height adjustment screw <NUM>.

The upper bracket K1 is placed on the upper surface of the partition plate <NUM> (see <FIG>) of the upper pillar <NUM>, and the lower bracket K2 is located on the lower surface of the partition plate <NUM>, and thus the height adjustment screw <NUM> is configured to be rotatable only in a state of being connected to the upper pillar <NUM>. Instead, when the height adjustment screw <NUM> rotates, the height adjustment screw <NUM> and the upper pillar <NUM> singularly ascend or descend.

In summary, the upper bracket K1 and the lower bracket K2 can be understood as a configuration according to an embodiment provided to allow the height adjustment screw <NUM> to singularly ascend or descend with the upper pillar <NUM>.

At a point spaced upward from the lower end of the center shaft <NUM>, a rotation guide groove <NUM> is surrounded in the circumferential direction of the center shaft <NUM>. Further, the fastening hole <NUM> formed in the lower bushing 69b is aligned with the rotation guide groove <NUM>. In addition, the fastening member S inserted into the fastening hole <NUM> formed on the rear surface of the lower pillar <NUM> passes through the fastening hole <NUM> of the lower bushing 69b, and then is inserted into the rotation guide groove <NUM>.

According to this configuration, when an external force in the horizontal direction is applied to the upper pillar <NUM>, the upper pillar <NUM>, the lower pillar <NUM>, the upper bushing 69a, and the lower bushing 69b rotates about the center shaft <NUM>.

In addition, a fastening hole <NUM> is formed at a point spaced upward from the lower end of the center shaft <NUM>, and the fastening boss passing through the support boss <NUM> (see <FIG>) of the clamp body <NUM> is inserted into the fastening hole <NUM>. Therefore, the center shaft <NUM> is fixed to the clamp body <NUM> and does not rotate.

In addition, while the upper bushing 69a is fitted to the center shaft <NUM>, it ascends or descends together with the upper pillar <NUM> without being constrained by the center shaft <NUM>.

In detail, the fastening member S passing through the fastening hole <NUM> formed on the rear surface of the upper pillar <NUM> is inserted into the fastening hole <NUM> formed at the lower end of the upper bushing 69a, and thus the upper bushing 69a is singularly combined with the upper pillar <NUM>.

Accordingly, when the upper pillar <NUM> ascends or descends by rotating the height adjustment screw <NUM>, the upper bushing 69a is also moved up or down along the center shaft <NUM>.

<FIG> is a longitudinal cross-sectional view of the pillar unit illustrating a state of adjusting the height of the upper pillar.

Referring to <FIG>, in order for the user to adjust the height of the display panel D, the wrench <NUM> is fitted to the head of the height adjustment screw <NUM> to rotate the height adjustment screw <NUM> in one direction.

Then, while the upper pillar <NUM> ascends or descends together with the height adjustment screw <NUM>, the lower end of the upper pillar <NUM> moves away from the upper end of the lower pillar <NUM> or gets closer to the upper end of the lower pillar <NUM>.

At this time, the upper bushing 69a ascends or descends along the center shaft <NUM> together with the upper pillar <NUM>. On the other hand, the lower pillar <NUM> and the lower bushing 69b remain state of being fixed to the center shaft <NUM>.

Meanwhile, since threads are formed only on the outer circumferential surface of the lower end portion of the rotation prevention shaft <NUM> and no threads are formed on the other outer circumferential surfaces, when the upper pillar <NUM> ascends or descends, the rotation prevention shaft <NUM> remains a state of being fixed to the upper surface of the lower pillar <NUM>.

<FIG> is a perspective view illustrating a housing cover constituting a pillar unit according to an embodiment of the present disclosure, and <FIG> is a cross-sectional view illustrating the housing cover taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG> and <FIG>, the housing cover <NUM> according to the present disclosure performs a function of covering the vertical portion <NUM> of the upper pillar <NUM>, the pillar cover <NUM>, and the lower pillar <NUM> to block external exposure thereof.

In detail, a cutout <NUM> is formed on the front surface of the housing cover <NUM> so that the upper pillar <NUM> does not interfere with the front surface of the housing cover <NUM> when the upper pillar <NUM> ascends.

An avoidance groove <NUM> is formed at the lower end of the rear surface of the housing cover <NUM>, and the protrusion portion <NUM> protruding from the lower end of the rear surface of the lower pillar <NUM> is fitted to the avoidance groove <NUM>. Due to the coupling of the protrusion portion <NUM> and the avoidance groove <NUM>, the housing cover <NUM> singularly rotates with the lower pillar <NUM>.

Guide ribs <NUM> may protrude from both edges of the cutout <NUM>. The guide rib <NUM> may extend from an upper end to a lower end of the cutout <NUM>.

When the housing cover <NUM> is fitted to the outer circumferential surface of the upper pillar <NUM>, the guide rib <NUM> is fitted to the guide groove <NUM> formed in the vertical portion <NUM> of the upper pillar <NUM>. Guide grooves <NUM> may also be formed at front ends of side surfaces of the pillar cover <NUM> and the lower pillar <NUM>.

With this structure, the housing cover <NUM> can be mounted by sliding down along the outer circumferential surfaces of the upper pillar <NUM> and the lower pillar <NUM> without shaking and can be separated by sliding up.

<FIG> is an exploded perspective view illustrating a clamp unit constituting a display supporting apparatus according to an embodiment of the present disclosure, <FIG> is a coupled cross-sectional view illustrating the clamp unit taken along line <NUM>-<NUM> in <FIG>, and <FIG> is a cross-sectional view illustrating the display supporting apparatus taken along line <NUM>-<NUM> of <FIG>.

Referring to <FIG>, the clamp unit <NUM> constituting the display supporting apparatus <NUM> according to the embodiment of the present disclosure may include a clamp body <NUM> placed on the upper edge of the table T, a clamp cover <NUM> fitted to the clamp body <NUM> at the lower side of table T, a fixing screw <NUM> passing through the bottom of the clamp cover <NUM>, a pressure plate <NUM> coupled to the upper end of the fixing screw <NUM> by the fastening member S, a gripping portion <NUM> coupled to the lower outer circumferential surface of the fixing screw <NUM>, and a pressure spring <NUM> fixed to the side of the clamp cover <NUM> by the fastening member S.

In detail, the clamp body <NUM> may include a base plate <NUM> seated on the upper surface of the table T, a support boss <NUM> extending upward from the center of the upper surface of the base plate <NUM>, and an extension end <NUM> extending downward from the bottom edge of the base plate <NUM>.

The support boss <NUM> may be formed in the shape of a truncated cone whose diameter decreases toward the upper side. A rotation limiting protrusion <NUM> may protrude from an upper end of the support boss <NUM>.

The support boss <NUM> is fitted to the support boss seating surface <NUM> formed inside the lower pillar <NUM>. The inner space formed by the support boss seating surface <NUM> may be understood as a support boss accommodation portion for accommodating the support boss <NUM>. In other words, it may be understood that the support boss <NUM> is inserted into the support boss accommodation portion that is recessed upward from the lower end of the lower pillar <NUM>.

A fastening hole <NUM> is formed in the support boss <NUM>, and the fastening member S inserted into the fastening hole <NUM> is inserted into a fastening hole <NUM>(see <FIG>) formed at the lower end of the center shaft <NUM>, so that the support boss <NUM> and the center shaft <NUM> are singularly coupled.

As illustrated in <FIG>, a rotation limiting protrusion <NUM> protrudes from an inner circumferential surface of the lower pillar <NUM> corresponding to an upper end of the support boss seating surface <NUM>. When the lower pillar <NUM> rotates about the support boss <NUM>, the rotation limiting protrusion <NUM> interferes with the rotation limiting protrusion <NUM> of the support boss <NUM>, and thus rotation of the lower pillar <NUM> is limited.

In other words, the pillar unit <NUM> can rotate from a point where the rotation limiting protrusion <NUM> contacts one side surface of the rotation limiting protrusion <NUM> to a point where it contacts the other side surface of the rotation limiting protrusion <NUM>.

One of the rotation limiting protrusion <NUM> and the rotation limiting protrusion <NUM> may be defined as a first rotation limiting protrusion, and the other may be defined as a second rotation limiting protrusion.

Meanwhile, on the inner surface of the extension end <NUM>, a plurality of catching grooves <NUM> are continuously disposed in the vertical direction. The function of the plurality of catching grooves <NUM> will be described below along with the description of the clamp cover <NUM>.

In addition, when the gripping portion <NUM> connected to the lower end of the fixing screw <NUM> is rotated, while the fixing screw <NUM> ascends from the bottom of the clamp cover <NUM> the pressure plate <NUM> is in close contact with the bottom surface of the table T. When the pressure plate <NUM> is in close contact with the bottom surface of the table T, the clamp unit <NUM> stably supports the pillar unit <NUM>.

<FIG> is a perspective view illustrating a pressure spring constituting a clamp unit according to an embodiment of the present disclosure.

Referring to <FIG>, the pressure spring <NUM> include a horizontal portion <NUM>, a vertical portion <NUM> extending upward from one end portion of the horizontal portion <NUM>, and a bent portion <NUM> that is bent in an upper end of the vertical portion <NUM> and extends downward.

The horizontal portion <NUM> is in close contact with the inner bottom of the clamp cover <NUM>, and the vertical portion <NUM> is in close contact with the inner side surface of the clamp cover <NUM>.

A fastening hole <NUM> is formed in the horizontal portion <NUM>, and the fastening member S passes through the fastening hole <NUM> and is inserted into the bottom of the clamp cover <NUM>.

The bent portion <NUM> is convexly rounded in a direction away from the vertical portion <NUM> as it goes downward, and may generate elastic force.

The pressure spring <NUM> may be made of a metal material having a predetermined modulus of elasticity.

<FIG> is a front perspective view illustrating a clamp cover constituting a clamp unit according to an embodiment of the present disclosure, and <FIG> is a bottom perspective view illustrating the clamp cover.

Referring to <FIG> and <FIG> together with <FIG>, the clamp cover <NUM> according to the embodiment of the present disclosure may include a bottom portion <NUM>, a side portion <NUM> extending upward from the edge of the bottom portion <NUM> by a predetermined length, and an extension end insertion portion <NUM> protruding from the side portion <NUM> and having an extension end insertion hole <NUM> formed therein.

In detail, a fixing screw through-hole <NUM> through which the fixing screw <NUM> passes is formed at the center of the bottom portion <NUM>, and a screw thread is formed on an inner circumferential surface of the fixing screw through-hole <NUM>.

A pressure spring mounting portion <NUM> is stepped across the side portion <NUM> and the bottom portion <NUM> forming one surface of the extended end insertion portion <NUM>.

The horizontal portion <NUM> of the pressure spring <NUM> is seated on a portion formed on the bottom portion <NUM> of the pressure spring seating portion <NUM>, and the vertical portion <NUM> of the pressure spring <NUM> is in close contact with the pressure spring mounting portion <NUM> formed on the side portion <NUM>. In addition, the bent portion <NUM> of the pressure spring <NUM> is located in the insertion hole <NUM> of the extension end. In addition, an end portion of the bent portion <NUM> is in contact with the outer circumferential surface of the side portion <NUM> defining one surface of the extension end insertion hole <NUM>.

A fastening hole <NUM> is formed in a portion of the pressure spring mounting portion <NUM> formed in the bottom portion <NUM>. Then, the fastening member S passes through the fastening hole <NUM> of the pressure spring <NUM> and is inserted into the fastening hole <NUM> so that the pressure spring <NUM> is fixed to the clamp cover <NUM>.

The extended end <NUM> of the clamp body <NUM> is inserted into the extension end insertion hole <NUM>, and the bent portion <NUM> of the pressure spring <NUM> is elastically deformed to press the extension end <NUM>. Due to the pressing force acting on the extended end <NUM>, the bottom portion <NUM> of the clamp cover <NUM> is slightly inclined downward from the horizontal state.

The extension end insertion hole <NUM> has a circumferential width and a radial width of the clamp cover <NUM>. The radial width of the clamp cover <NUM> is designed to be greater than the thickness of the extension end <NUM>, so that, in a state where the extension end <NUM> is inserted into the extension end insertion hole <NUM>, the clamp cover <NUM> can swing in the up and down direction.

Meanwhile, a catching end <NUM> extends downward at the edge of the bottom portion <NUM> adjacent to the extension end insertion portion <NUM>, and the lower end of the catching end <NUM> may be bent outward in the direction of the bottom portion <NUM>. In addition, an end portion of the bent catching end <NUM> is caught in the catching groove <NUM> formed in the extension end <NUM>.

In a state where the base plate <NUM> is seated on the upper surface of the table T, the extension end <NUM> is inserted into the extension end insertion hole <NUM>. Then, the clamp cover <NUM> is pushed up until the upper end of the side portion <NUM> of the clamp cover <NUM> is in close contact with the bottom surface of the table T.

Then, since the upper ends of the side portions <NUM> of the base plate <NUM> and the clamp cover <NUM> are in close contact with the upper and lower surfaces of the table T, the clamp unit <NUM> can be more stably coupled to the table T without shaking, compared to the case where only the pressure plate <NUM> is in close contact with the lower surface of the table T.

In other words, in addition to fixing the clamp unit <NUM> by rotating the fixing screw <NUM> so that the pressure plate <NUM> comes into close contact with the lower surface of the table T, since the upper surface of the clamp cover <NUM> is in contact with the lower surface of the table T and thus the clamp unit <NUM> is additionally fixed to the table T, the clamp unit <NUM> can be stably fixed.

In addition, by the elastic force of the pressure spring <NUM>, in a state where the bottom portion of the clamp cover <NUM> is inclined slightly downward from the horizontal state, the catching end <NUM> is the catching groove <NUM> of the extension end <NUM> is firmly inserted. As a result, in a state where the clamp unit <NUM> is fixed to the table T, shaking caused by the load of the display supporting apparatus <NUM> excluding the display panel D and the clamp unit <NUM> can be minimized.

Here, in order to push the clamp cover <NUM> up along the extension end <NUM>, the clamp cover <NUM> is pushed up with a horizontal force applied so that the bottom surface of the clamp cover <NUM> is in a horizontal state. Then, when the upper end of the clamp cover <NUM> is in contact with the lower surface of the installation surface such as the table T, the horizontal direction force and the pushing force are removed. Then, while the clamp cover <NUM> slightly droops downward due to the restoring force of the pressure spring <NUM>, the catching end <NUM> is caught in the catching groove <NUM>.

Meanwhile, as illustrated in <FIG>, the rotation limiting protrusion <NUM> formed on the clamp body <NUM> interferes with the rotation limiting protrusion <NUM> protruding from the inside of the lower pillar <NUM>, and thus the angle at which the pillar unit <NUM> can rotate about a vertical axis is limited.

In other words, the pillar unit <NUM> may rotate in the clockwise direction or in the counterclockwise direction about a vertical axis only up to a point where the rotation limiting protrusion <NUM> touches the rotation limiting protrusion <NUM>.

<FIG> is a partial perspective view illustrating a method for installing a clamp unit according to another embodiment of the present disclosure, and <FIG> is a longitudinal cross-sectional view illustrating the clamp unit taken along line <NUM>-<NUM> of <FIG>.

In this embodiment, since the clamp unit <NUM> is the same as the clamp unit <NUM> described above, redundant description of the clamp unit <NUM> will be omitted.

Referring to <FIG> and <FIG>, the clamp unit <NUM> according to the embodiment of the present disclosure, in addition to the conventional coupling method in which the extended end <NUM> of the clamp body <NUM> is in close contact with the side surface of the table T, there is an advantage that the extended end <NUM> of the clamp body <NUM> can be mounted by being fitted to the cable through-hole (H) formed in the table (T).

In detail, the extended end <NUM> of the clamp body <NUM> is designed to have a smaller width than the diameter of the cable through-hole H formed in the table T, so that the extended end <NUM> is inserted into the cable through-hole H.

Claim 1:
A display supporting apparatus (<NUM>) comprising:
a clamp unit (<NUM>) fixed to an installation surface;
a pillar unit (<NUM>) connected to the clamp unit to rotate about a vertical axis;
a neck unit (<NUM>) connected to an end portion of the pillar unit to rotate about a vertical axis;
an arm unit (<NUM>) connected to an end portion of the neck unit (<NUM>) to rotate about a first horizontal axis;
a connection unit (<NUM>) connected to an end portion of the arm unit (<NUM>) to rotate about the first horizontal axis; and
a display supporting unit (<NUM>) connected to the connection unit (<NUM>), having a display unit (D) mounted on a front surface thereof, and rotatable about the first horizontal axis, a second horizontal axis, and the vertical axis,
wherein the arm unit (<NUM>) includes:
a case (<NUM>);
a link assembly (<NUM>, <NUM>) accommodated in the case, having a rear end rotatably connected to the neck unit (<NUM>) and a front end connected to the connection unit (<NUM>);
a spring supporting bracket (<NUM>) fixed to the case (<NUM>) at a point corresponding to the inner front of the case; and
an elastic adjustment body (<NUM>) having a front end portion connected to the spring supporting bracket (<NUM>) and a rear end portion inserted into a rear surface of the case (<NUM>).