KR101690778B1 - Beam projector lift - Google Patents

Beam projector lift Download PDF

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Publication number
KR101690778B1
KR101690778B1 KR1020150118608A KR20150118608A KR101690778B1 KR 101690778 B1 KR101690778 B1 KR 101690778B1 KR 1020150118608 A KR1020150118608 A KR 1020150118608A KR 20150118608 A KR20150118608 A KR 20150118608A KR 101690778 B1 KR101690778 B1 KR 101690778B1
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KR
South Korea
Prior art keywords
beam projector
lift
lift guide
vertical
moving
Prior art date
Application number
KR1020150118608A
Other languages
Korean (ko)
Inventor
김동순
Original Assignee
주식회사 에이스텍
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Priority to KR1020150118608A priority Critical patent/KR101690778B1/en
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Publication of KR101690778B1 publication Critical patent/KR101690778B1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

The present invention relates to a beam projector lift received inside a stand (hereinafter, stage) formed in front of seats and exposed outside of the stage by being vertically and horizontally moved when being used and, more specifically, to a beam projector lift including: a beam projector (100) received inside the stage (10); a vertical transferring unit (110) including a base (111) wherein the beam projector (100) is installed and vertically moving the beam projector (100); and a horizontal transferring unit (120) horizontally moving the beam projector (100). The beam projector lift additionally includes an adjuster (200) capable of horizontally and vertically moving the beam projector (100). The adjuster (200) is capable of controlling the vertical and horizontal movements of the beam projector with a single manipulation, controlling the beam projector (100) to make an emergency stop even in case the beam projector (100) is horizontally and vertically moved, and controlling the beam projector (100) to be turned on and off.

Description

BEAM PROJECTOR LIFT

The present invention relates to a beam projector lift accommodated in a stage (hereinafter referred to as 'stage') formed on the front face of a passenger seat, and vertically and horizontally moved in use and exposed to the outside of the stage.

More specifically, a beam projector 100 housed inside the stage 10; A vertical moving part 110 including a base 111 on which the beam projector 100 is installed and vertically moving the beam projector 100; And a horizontal moving part (120) for horizontally moving the beam projector (100).

The present invention further includes a controller (200) capable of vertically and horizontally moving the beam projector (100), wherein the controller (200) controls the beam projector to be vertically and horizontally moved in a single operation, 100 can be controlled to be in an emergency stop even in the case of vertical and horizontal movement, and to control on / off of the beam projector 100.

A beam projector is a device that uses light to illuminate a slide or moving image on a screen.

These beam projectors were first installed on a ceiling such as a desk, or installed to be exposed to the outside of a ceiling. For the purpose of practical space utilization and safety of the interior space, they were housed in a ceiling when not in use. So as to be exposed to the outside.

As a structure for this purpose, a space for accommodating a beam projector is formed in a ceiling, and a structure such as a lift is provided in the space to control operation in an upward / downward direction. For example, A projector lift device of No. 20-0404345 is described.

The above-described technology relates to a project electric lift for storing and exposing a project by installing a project on a ceiling of a building. The projector electric lift installed in an empty space inside the ceiling includes a main body case exposed to the outside and an inner case Respectively.

The movement of the case moving up and down serves to minimize the swaying movement of the X-shaped guide. The upper and lower motions are flat and the coil-type cable is installed in the composite pulley system and wound or loosely wound on the upper circumferential motor It can be moved up and down.

However, since the technology described above is housed in the ceiling and used to expose it to the outside during use, it is positive in that it can effectively utilize the internal space, but it is not stable because of falling down as it is formed in the ceiling have.

That is, it is necessary to efficiently utilize the internal space when the beam projector is not used without installing it on the ceiling.

However, it is costly and inefficient to construct the floor to install a conventional technique such as the above-described prior art, and it is disadvantageous that the bottom portion accommodating the beam projector can not be used.

Therefore, it can be used inside the stage (stage) formed on the front face of the audience and exposed to the outside of the stage when using the beam projector. However, it can be used not only for moving the beam projector vertically, It is necessary to develop a technique capable of varying the exposure position of the beam projector according to the internal conditions.

Registration Utility Model Publication No. 20-0404345 (December 15, 2005)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a beam projector which is housed inside a stage (hereinafter referred to as 'stage') formed on the front face of a passenger seat, A lift, comprising: a beam projector (100) housed inside a stage (10); A vertical moving part 110 for vertically moving the beam projector 100; And a horizontal moving part (120) for horizontally moving the beam projector (100).

It is a further object of the present invention to provide an apparatus and a method for controlling a beam projector, which further includes a controller (200) capable of vertically and horizontally moving the beam projector (100) And to control the beam projector 100 so that it can be stopped even when the beam projector 100 is vertically moved, and to control on / off of the beam projector 100.

According to an aspect of the present invention, there is provided a beam projector lift which is housed inside a stage (hereinafter, referred to as 'stage') formed on the front of a seat, and is vertically and horizontally moved during use to be exposed to the outside of the stage A beam projector 100 housed inside the stage 10; A vertical moving part 110 for vertically moving the beam projector 100; And a horizontal moving part 120 for moving the beam projector 100 horizontally.

The present invention further includes a controller (200) capable of vertically and horizontally moving the beam projector (100), wherein the controller (200) controls the vertical and horizontal movement of the beam projector in a single operation, The projector 100 is controlled to be in an emergency stop state even when the projector 100 is moving vertically and horizontally, and the ON / OFF control of the beam projector 100 is controlled.

Since the beam projector lift according to the present invention is not buried in the ceiling unlike the conventional beam projector lift, it has the effect of solving the problems such as equipment damage or personal injury caused by falling of the beam projector, and at the same time, It has a remarkable effect that the internal space can be utilized widely without installing it.

Further, since the present invention can control the vertical and horizontal movements of the beam projector, respectively, as well as the vertical and horizontal movements can be controlled at a time by the one-touch method, it is easy to control the vertical and horizontal movements of the beam projector There is an advantage in that one control is possible, and since the emergency stop is also possible, the beam projector has a remarkable effect that can be stopped even in the event of a dangerous situation.

Figure 1 schematically illustrates the installation of a beam projector lift according to the present invention.
2 schematically shows the structure of a vertical moving part in a beam projector lift according to an embodiment of the present invention.
Figure 3 schematically shows the construction of a vertical moving part in a beam projector lift according to another embodiment of the present invention.
4 schematically shows the construction of a horizontal moving part in a beam projector lift according to the present invention.
Figure 5 schematically shows the configuration of a vertical moving part in a beam projector lift according to another embodiment of the present invention.
Figure 6 is a block diagram of the configuration of a controller in a beam projector lift according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor can properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

Before describing the present invention with reference to the accompanying drawings, it should be noted that the present invention is not described or specifically described with respect to a known configuration that can be easily added by a person skilled in the art, Let the sound be revealed.

Prior to the description, the controller is described as a configuration for controlling the beam projector lift in this specification, but the control means of the beam projector lift itself is not shown in the drawing. However, it is a matter of course that a control means for controlling a specific apparatus is provided in the apparatus, so even if the function of the control means is omitted, it is of course implied that the control means is provided in the description.

The present invention relates to a beam projector lift accommodated in a stage, which is vertically and horizontally moved in use and exposed to the outside of the stage.

FIG. 1 schematically illustrates the installation of a beam projector lift according to an embodiment of the present invention. The beam projector 100 is installed below (under, inside) a stage 10, .

At this time, it is a matter of course that the stage 10 includes a housing (or an inner space) capable of accommodating the beam projector 100 therein.

Such a beam projector 100 may be exposed to the outside of the stage 10 due to the horizontal movement part 120 formed at the lower part of the projector.

The beam projector 100 exposed to the outside of the stage 10 by a certain distance can be vertically moved (vertically moved) by the vertical movement unit 110.

Accordingly, safety and stability can be secured as compared with a beam projector lift used in a conventional ceiling, and even if a beam projector is installed on the floor, the space is not occupied.

Hereinafter, a structure for vertically and horizontally moving the beam projector lift according to the present invention will be described with reference to the accompanying drawings.

2 schematically shows the structure of a vertical moving part in a beam projector lift according to an embodiment of the present invention.

2 of the accompanying drawings, the vertical moving part 110 includes a base 111, a vertical control motor 112, an X-lift guide moving rod 113, an X-lift guide 114 and an X- can do.

The base 111 may include an X-lift 115 and an X-lift guide moving rod 113, which can vertically move the beam projector 110 by installing the beam projector 100.

The vertical control motor 112 is formed on one side of the base 111 and performs a function of transmitting rotational force to the X-lift guide moving rod 113, which will be described later.

That is, as shown in FIG. 2 of the accompanying drawings, a gear may be formed at one end of the vertical control motor 112, and a gear engaged with the gear of the vertical control motor 112 may be formed at the X- The rotational force generated in the vertical control motor 112 can be transmitted to the X-lift guide moving rod 113.

At both ends of the X-lift guide moving rod 113, threads may be formed on one surface thereof. As shown in FIG. 2 of the accompanying drawings, the threads formed at both ends of the X-lift guide moving rod 113 may be formed so that their ends are symmetrically formed to be opposite to each other.

This is because the X-lift guide 114, which will be described later, is moved by the rotation of the X-lift guide moving rod 113, and both ends of the X- The X-lift guides 114 should be moved in opposite directions.

Such an X-lift guide moving rod can be installed on the base 111 by the support member 116 as shown in FIG. 2 of the accompanying drawings.

As shown in FIG. 2, the X-lift guide 114 may include two X-lift guide rods 113 and may be fitted to the X-lift guide rods 113. The X- 114 may be close to each other and away from each other.

The first X-lift (115a) and the second X-lift (115b) may be connected to the two X-lift guides (114).

That is, the X-lift 115 is moved upward when the X-lift guide 114 is brought close to the X-lift guide 114 by driving the vertical control motor 112, and is moved downward when the X- .

In this case, the beam projector lift according to the present invention is operated by the rotational force of the vertical control motor and the thread formed on the X-lift guide moving rod 113. When foreign substances such as dust are generated on the thread, Is moved slower or faster than the other one, so that the beam projector 100 installed at the uppermost end thereof may be lost in the center. In this case, the beam projector 100 may be damaged or may be injured There is a concern.

Accordingly, in order to solve the above-described problem, another embodiment of the present invention can detect whether the two X-lift guides 114 are operated while maintaining a certain distance from each other. This is illustrated in FIG.

Figure 3 schematically shows the construction of a vertical moving part in a beam projector lift according to another embodiment of the present invention.

3 of the accompanying drawings, the distance measuring means 116a is provided on the support member 116 for supporting the X-lift guide moving rod 113 and the reflecting means 114a is provided in the lower direction of the X- Can be designed to be extended.

At this time, since the reflecting means 114a must be moved along the X-lift guide 114, it is preferable that the reflecting means 114a is formed to be shorter than the supporting member 116. [

The distance measuring means 116a may be means for outputting light or infrared rays and the reflecting means 114a may be a means for reflecting the light outputted from the distance measuring means 116a, Lt; / RTI >

The distance measuring means 116a may include not only means for outputting light, infrared rays, etc., but also means for receiving light, infrared rays, and the like reflected from the reflecting means 114a.

Finally, the distance measuring means 116a can measure the distance from the distance measuring means 116a to the reflecting means 114a by analyzing the received light, which is the time of flight (TOF) of the light By analyzing, it can be seen how close the reflection means 114a is from the distance measurement means 116a.

Thus, it is possible to detect whether the two X-lift guides 114 move with the same distance around the distance measuring means 116a.

Furthermore, if the two X-lift guides 114 do not maintain the same distance around the distance measuring means 116a, an alarm or an additional communication means (not shown in the drawing) is provided in the support member 116 And notify the controller 200, which will be described later.

Hereinafter, the horizontal movement of the beam projector 100 in the beam projector lift according to the present invention will be described with reference to FIG. 4 of the accompanying drawings.

4 schematically shows the construction of a horizontal moving part in a beam projector lift according to the present invention.

The horizontal moving part 120 according to FIG. 4 of the accompanying drawings serves to assist horizontal movement (forward and backward movement) of the beam projector 100 and can be a model formed by including a wheel on both sides of the lower surface of the base 111 And the wheels may be formed on both sides of the base 111 according to design conditions, and the number of wheels may be four.

Here, the horizontal moving part 120 may move according to the direction that the user is guiding through the wheel, and may be automatically operated according to the control of the controller 200, which will be described later.

The horizontal movement unit 120 may include a horizontal control motor 121, a first gear 122 and a second gear 123.

The horizontal control motor 121 may be connected to the first gear wheel 122 and may transmit the rotational force to the horizontal movement unit 120.

The first and second toothed wheels 122 and 123 may be configured to be engaged with each other and may be designed to be operated by the rotational force of the horizontal control motor 121.

The first gear 122 is rotated by the horizontal control motor 121 and the second gear 123 meshed with the first gear 122 meshes with the first gear 122 So that the horizontal moving part 120 can be moved.

Here, if the first toothed wheel 122 rotates forward, the second toothed wheel 123 rotates rearward, and when the first toothed wheel 122 rotates rearward, the second toothed wheel 123 rotates forward It can rotate.

The horizontal moving part 120 is provided with a communication line (not shown) and a power cord (not shown) at one side of the base 111 to receive commercial power from an outlet installed on the wall of the stage 10, 121).

Further, a motor for generating a power to adjust the length of the power cord can be configured so that a power cord can be wound by disposing a cord drill (a device for winding an electric cord) inside the base 111 according to a design condition It is possible.

In the beam project 100 according to the present invention, when the two X-lift guides 114 are moved by the distance measuring means 116a with the distance measuring means 116a as a center, It is also possible to control each of the X-lift guides 114 to move with the same length around the distance measuring means 116a.

This will be described with reference to FIG. 5 of the accompanying drawings.

Figure 5 schematically shows the configuration of a vertical moving part in a beam projector lift according to another embodiment of the present invention.

Here, FIG. 5 describes one example of the vertically movable portion of the structure of the beam projector lift of the present invention, so that it is described in advance that portions overlapping with the above-described contents are not duplicated.

5, the X-lift guide rod 113 can be separated into a first X-lift guide rod 113a and a second X-lift guide rod 113b.

As the first X-lift guide rod 113a and the second X-lift guide rod 113b are separated from each other, the vertical control motor 112 is divided into a first vertical control motor 112a and a second vertical control motor 112b And the vertical control motor 112 may be composed of two.

Therefore, when the X-lift guide provided on the first X-lift guide moving rod 113a and the X-lift guide provided on the second X-lift guide moving rod 113b are driven with the distance measuring means 116a being kept at different distances from each other (Rotation force) of the first vertical control motor 112a or the second vertical control motor 112b described above through the control means (not shown) provided on the base 111, The X-lift guide provided on the guide moving rod 113a and the X-lift guide provided on the second X-lift guide moving rod 113b can be controlled to maintain the same distance around the distance measuring means 116a.

When it is detected that the X-lift guide provided on the first X-lift guide moving rod 113a is located farther from the X-lift guide provided on the second X-lift guide moving rod 113b than with respect to the distance measuring means 116a, It is possible to control the driving of the one vertical control motor 112a to be faster or the driving of the second vertical control motor 112b to be slower.

The beam projector lift according to the present invention as described above further includes a separate controller 200 so that the beam projector 100 can be operated remotely.

Although not shown in the figure, an interface configuration capable of performing an operation (slide, turn, turn, click, etc.) for performing presentation work such as PPT through the beam projector 100 may be further included.

The controller 200 is for operating the beam projector 100 remotely and may be provided on a single phase of the stage 10 or may be constituted by a control device in the form of a remote control.

The controller 200 may mainly include a communication unit 210 and a control unit 220.

The communication unit 210 performs a function of communicating with control means (not shown) of the base on which the beam projector 100 is installed, and various communication methods such as wired and / or wireless may be employed.

The control unit 220 functions to control the beam projector 100, the vertical movement unit 110 and the horizontal movement unit 120 and includes a vertical control module, a horizontal control module, a one-touch control module, an emergency stop control module, And an on / off control module.

The vertical control module performs the function of controlling the vertical movement unit 110 described above, and the horizontal control module can perform the function of controlling the horizontal movement unit 120 described above.

That is, it may mean a 'manual' operation in which the beam projector 100 is moved vertically or horizontally according to a single operation.

Here, the vertical movement unit 110 and the horizontal movement unit 120 may be configured as upward, downward, left, and right buttons so as to move in a direction desired by the user.

The one-touch control module can control the vertical and horizontal movement of the beam projector 100 at one time in a single operation, which can mean 'automatic' operation.

The emergency stop control module can perform a function of controlling the emergency stop when the beam projector 100 is vertically moved.

That is, when foreign substances such as dust are generated as described above and the X-lift guide moves at a different distance from the center of the X-lift guide moving rod with different distances, the beam projector 100, The parallelism of the support plate (a structure for supporting the beam projector, not shown in the drawings) that supports the beam projector 100 may be reduced and the beam projector 100 may be detached or the apparatus itself may be damaged. 100) must be stopped in an emergency.

At this time, when the controller 200 is installed in a single phase, the X-lift guide moves the center of the X-lift guide moving rod at different distances around the center as described above through the terminal (computer or the like) It may be designed to be displayed on the screen of the terminal so that it can be notified to the user.

That is, although not shown in the drawing, the controller 200 may further include a notification display unit capable of emitting (a) light, (b) alarming, or (c)

When the X-lift guide rod 113 is divided into the first X-lift guide rod 113a and the second X-lift guide rod 113b in the above-described case, And may be designed to control each of the vertical control motors 112a and 112b.

The on / off control module can control the on or off operation of the beam projector 100 by controlling the power on or off of the beam projector 100.

Since the beam projector lift according to the present invention as described above is not buried in the ceiling unlike the conventional beam projector lift, it has the effect of solving the problems such as equipment damage or human injury caused by falling of the beam projector At the same time, it is possible to utilize the internal space widely even if it is not installed on the ceiling.

Further, since the present invention can control not only the vertical movement of the beam projector but also emergency stop, it is possible to stop the emergency operation even if a dangerous situation occurs in moving the beam projector.

1 to 6 are merely the main points of the present invention. As various designs can be made within the technical scope of the present invention, the present invention is limited to the configurations of Figs. 1 to 6 It is self-evident.

10: Stage
100: beam projector 110: vertical moving part
111: Base 112: Vertical control motor
113: X-lift guide moving rod 114: X-lift guide
115: X-lift 116: support member
120: horizontal moving part 121: horizontal control motor
122: first gear 123: second gear
200: controller 210:
220:

Claims (5)

A beam projector 100 housed inside the stage 10;
A vertical moving part 110 including a base 111 on which the beam projector 100 is installed and vertically moving the beam projector 100; And a horizontal moving unit 120 for horizontally moving the beam projector 100,
The horizontal movement unit 120 includes:
Comprising a plurality of wheels,
A horizontal control motor 121 formed on an inner surface of the base for controlling horizontal movement of the horizontal moving part; And
And a first gear 122 and a second gear 123 connected to the horizontal control motor 121 and operated by the rotational force of the motor,
The vertical movement unit 110 includes:
The base 111;
A vertical control motor 112 formed on one side of the base to control vertical movement of the beam projector 100;
An X-lift guide moving rod 113 which is rotated by the rotational force from the vertical control motor 112 and has threads formed on outer surfaces of both ends in opposite directions to each other;
An X-lift guide 114 which is formed by two X-lift guide moving rods 113 and is installed close to or away from each other by rotation of the X-lift guide moving rod 113; And
And an X-lift (115) connected to the X-lift guide (114) and vertically moving the beam projector (100) in accordance with the movement of the X-lift guide (114)
The vertical movement unit 110 includes:
The distance measuring means 116a is disposed at the center of the X-lift guide moving rod 113 and the reflecting means 114a is extended downward of the X-lift guide 114,
The distance measurement means (116a)
Lifts the two X-lift guides (114) to detect whether the two X-lift guides (114) are moving with equal spacing relative to the distance measuring means (116a).
delete delete The method according to claim 1,
The vertical movement unit 110 includes:
The X-lift guide moving rod 113 is divided into a first X-lift guide rod 113a and a second X-lift guide rod 113b with respect to the center thereof,
The first X-lift guide rod 113a and the second X-lift guide rod 113b are connected to vertical control motors 112a and 112b for applying rotational force to the first X-lift guide rod 113a and the second X-
When the first X-lift guide moving rod 113a and the second X-lift guide moving rod 113b do not move at the same distance around the distance measuring means 116a, the vertical control motors 112a and 112b, Wherein the control means controls the rotational force of any one of the vertical control motors.
The method according to claim 1,
Further comprising a controller (200) capable of remotely controlling vertical and horizontal movement of the beam projector (100)
The controller (200)
A communication unit 110 for wired or wireless communication with the beam projector 100; And
And a control unit (120) capable of controlling the operation of the beam projector (100)
The control unit (120)
A vertical control module for controlling vertical movement of the beam projector 100;
A horizontal control module for controlling the horizontal movement of the beam projector 100;
A one-touch control module for automatically controlling vertical and horizontal movement of the beam projector 100 by a single operation;
An emergency stop control module for controlling the emergency stop when the beam projector 100 is vertically moved; And
And an on / off control module capable of controlling on or off operation of the beam projector (100).
KR1020150118608A 2015-08-24 2015-08-24 Beam projector lift KR101690778B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190053050A (en) 2017-11-09 2019-05-17 주식회사 에이스텍 Beam projector lift

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62238122A (en) * 1986-04-08 1987-10-19 Mazda Motor Corp Change-over control device for four-wheel drive vehicle
KR200404345Y1 (en) 2005-09-29 2005-12-21 주식회사 오리온멀티미디어 Projector Lift Device
KR200441352Y1 (en) * 2007-06-18 2008-08-11 오태준 Automatic visual and auditory adjuster of a LCD and PDP television
KR101405496B1 (en) * 2013-10-30 2014-06-27 주식회사 유일이엔지 lift for stage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62238122A (en) * 1986-04-08 1987-10-19 Mazda Motor Corp Change-over control device for four-wheel drive vehicle
KR200404345Y1 (en) 2005-09-29 2005-12-21 주식회사 오리온멀티미디어 Projector Lift Device
KR200441352Y1 (en) * 2007-06-18 2008-08-11 오태준 Automatic visual and auditory adjuster of a LCD and PDP television
KR101405496B1 (en) * 2013-10-30 2014-06-27 주식회사 유일이엔지 lift for stage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190053050A (en) 2017-11-09 2019-05-17 주식회사 에이스텍 Beam projector lift

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