KR20020005134A - Hight adjuster for prop of projector - Google Patents

Abstract

PURPOSE: A height adjuster for the work rest of a projector is provided to easily and conveniently adjust the height and the angle of the work rest. CONSTITUTION: A height adjuster for a projector work rest contains a base(10) having several casters(11), a supporting bar(20) vertically fixed to the base with a wire fixer(21), a first lifting bar(30) inserted into the supporting bar with an ascent and a descent guiding roll(31), a screw bar inserted into the supporting bar to lift the lifting bar, a driving device(50) driving the screw bar, a second lifting bar(60) inserted into the first lifting bar, an ascent wire(70) fixed to the wire fixer through the ascent guiding roll from the second lifting bar to in crease the first and the second lifting bar at the same time, a descent wire(80) fixed to the wire fixer through the descent guiding roll from the second lifting bar to lowering the first and the second lifting wire at the same time, and a work rest(90) installed on the second lifting bar. In this structure, a handle(52) is rotated clockwise or a motor is driven forwardly, the screw bar is driven through driving sprockets, chains, movable sprockets and bevel gears and the first lifting bar and the second lifting bar are lifted by a nut member and the ascent wire. To lower the first and the second lifting bar, the handle is rotated counterclockwise and the motor is driven backwardly. Further, for adjusting the tilt angle of the work rest, a fixing lever(93) is released to adjust and tightened after finishing adjusting.

Description

Projector stand height adjuster {Hight adjuster for prop of projector}

The present invention relates to a projector stand, and more particularly, to a projector stand height adjustment device that allows the user to conveniently and easily adjust the height of the stand.

In general, the projector stand is conventionally uncomfortable because the height of the pedestal structurally could not be properly adjusted, when there is a problem in that the position of the screen and the pedestal to move at the same time to change the position.

An object of the present invention is to invent in order to solve the above conventional drawbacks, to provide a projector stand height adjustment device that allows the user to conveniently and easily adjust the height of the pedestal.

Another object of the present invention is to provide a projector pedestal height adjustment device that allows the user to conveniently and easily adjust the angle of the pedestal.

In order to achieve the above object, the present invention installs a plurality of casters to facilitate movement at the bottom of the base, vertically installs a support rod on the upper portion of the base, and allows the first and second elevating rods to be lifted into the support rod, respectively. Assembling and assembling, there is a built-in screw rod for elevating the first elevating rod in the support rod, when the first elevating rod and elevating the second elevating rod at the same height at the same time, The wires are installed respectively, and the upper part of the second elevating rod may be rotatably fixed to the projector stand so as to adjust the angle of the stand.

Figure 1a is a perspective view of the present invention, Figure 1b is a front view of the present invention, Figure 1c is a side view showing the operating state of the present invention, Figure 1d is a bottom view of the present invention.

Figure 2 is a front sectional view showing a structure of the present invention.

Figure 3 is a sectional view showing another embodiment of the drive means according to the invention.

Figure 4a, 4b is a cross-sectional view showing an operating state of the present invention.

5 is a perspective view showing a connection state of the rising and falling wires.

Figure 6 is a perspective view showing the installation of the flow preventing roll.

Figure 7a, 7b is a perspective view of the flow preventing roll.

Figure 8a is a perspective view showing an assembled state of the pedestal, Figure 8b is a front view showing an assembled state of the pedestal, Figure 8c is a side view showing an angle adjustment state of the pedestal.

<Code Description of Main Parts of Drawing>

10: base 11: caster

20: support rod 21: wire fixture

30: the first lifting bar 31: the rising guide roll

32: lowering guide roll 40: screw rod

50: drive means 60: second lifting bar

70: rising wire 80: falling wire

90: pedestal

Hereinafter, the technical configuration of the present invention according to the accompanying drawings in detail.

Projector stand height adjustment device of the present invention, as shown in Figures 1a to 8c, the base 10 is provided with several casters (11); A support rod 20 fixed vertically to the base 10 to which wire fixing tools 21 are attached at both upper sides thereof; A first elevating rod 30 fitted into the support rod 20 and having a pair of ascending and descending guide rolls 31 and 32 installed on both upper and lower sides thereof; A screw rod (40) installed in the support rod (20) to elevate the first elevating rod (30); Drive means 50 for driving the screw rod 40; A second elevating bar 60 inserted into the first elevating bar 30; Both ends of the second elevating rod (60) through the ascending guide roll (31) is fixed to the wire fixing tool (21) to raise the second elevating rod (60) at the same time when the first elevating rod (30) A rising wire 70; Both ends of the second elevating rod (60) through the descending guide roll (32) is fixed to the wire fixing tool (21) when the first elevating rod (30) when lowering the second elevating rod (60) at the same time Descending wire 80; What is configured to include a pedestal 90 installed on the upper portion of the second elevating rod 60 is a basic feature of the technical configuration.

Here, the base 10 is formed in an approximately 'H' shape as shown in FIG. 1A, and casters 11 are installed on both sides of the base 10 so as to easily move the base 10. 11, a stopper 12 is provided as well known.

The support rod 20 is firmly fixed in a vertical state at the center of the base 10 to support the first and second elevating rods 30 and 60 so as to be lifted and lowered. The lifting bar 30 is fitted to be elevated, and the second lifting bar 60 is fitted to the inside of the first lifting bar 30 to be elevated.

The wire fixture 21 is bent to form a 'b' shape as shown in Figure 5 is attached to the upper both sides of the support rod 20 by welding, the wire fixing sphere 21, the wire fixing bolt 22, 23 is Each is installed, and a wire hole 24 is drilled in the upper portion of the wire fixing tool 21.

Since the nut member 30a screwed to the screw rod 40 is installed on the inner lower portion of the first elevating rod 30, the first screw rod 40 is turned by the nut member 30a. As the lifting bar 30 is elevated, the height is naturally adjusted.

At this time, the engaging hole 33 having the inclined surface 33a is drilled on one side upper and lower sides of the first elevating rod 30, respectively, and the upper side of the support rod 20 of the spring 130 The intermittent bar 131 is installed in the locking hole 33 while receiving the elasticity.

Therefore, during the lifting operation, the first elevating rod 30 is raised or lowered only until the locking holes 33 formed at the upper and lower portions thereof are locked to the intermittent rod 131, and further elevating is blocked. Then, pulling the intermittent rod 131 can release the locking.

The rising guide roll 31 is rotatably installed on both upper sides of the first lifting bar 30 as the bracket 31a, as shown in FIG. 70) is wound.

The lower guide roll 32 is rotatably arranged on the lower both sides of the first elevating rod 30 as the shaft pin, as shown in Figure 5, the lower wire 80 to the lower side of the lower guide roll 32 It is wound.

The support rod 20, the first and second elevating rods 30, 60 is composed of a square pipe as shown in Figure 6, the upper surface of the support rod 20, the first elevating rod 30, the leaf spring ( While receiving the elasticity of 100, a pair of flow preventing rolls 101 which are in close contact with the outer surface of the first elevating bar 30, the second elevating bar 60, respectively, are installed, the first, second elevating bar 30 ( The lower surface of the 60 is provided with a flow preventing roll 111 in close contact with the inner surface of the support bar 20, the first elevating bar 30 while receiving the elasticity of the leaf spring 110.

The flow preventing rolls 101 and 111 prevent the first and second elevating rods 30 and 60 from flowing during the elevating operation, and at the same time, the first and second elevating rods 30 and 60 smoothly elevate. It plays a role to make it possible.

The pair of flow preventing rolls 101 are rotatably arranged on the roll fixing piece 100a which is bent at both the upper and lower sides of the leaf spring 100, as shown in FIGS. 6 and 7a, and the leaf spring 100 is rotated. Is fixed to the roll cover 102 by riveting, the roll cover 102 is fixed to the top of the support rod 20, the first elevating bar 30 by bolted.

The flow preventing roll 111 is rotatably arranged in the roll fixing piece (100a) bent on both sides of the leaf spring 110, as shown in Figure 6, 7b, the leaf spring 110 is first, second The lifting rods 30 and 60 are fixed by riveting directly.

The screw rod 40 is rotatably installed in the support rod 20 to elevate the first elevating bar 30 while rotating, and the screw rod 40 is the first elevating bar 30 as described above. Screwed to the nut member (30a).

As shown in FIG. 2, one embodiment of the driving means 50 according to the present invention includes a driving sprocket 51 and a handle 52 for driving the driving sprocket 51 arranged on an upper side of the supporting rod 20. , A bevel gear 55 installed at one lower side of the screw rod 40 to connect the driving sprocket 51 and the chain 53 to the movable sprocket 54 and the movable sprocket 54 and the screw rod 40. It is composed of At this time, one side of the support rod 20 is provided with a cover 1 to prevent the drive sprocket 51 and the chain 53 is exposed to the outside.

Referring to the operation of one embodiment of such a drive means 50 as follows. In other words, when the handle 52 is turned, the driving sprocket 51 is driven and the movable sprocket 54 connected to the driving sprocket 51 and the chain 53 is driven. As a result, the bevel gear 55 is screw rod. Since the driving of the 40, the first lifting bar 30 is raised and lowered. At this time, when the handle 52 is turned clockwise, the first lifting bar 30 is raised, and when the handle 52 is turned counterclockwise, the first lifting bar 30 is lowered.

On the other hand, another embodiment of the drive means 50 according to the present invention, as shown in Figure 3, the movable sprocket 54a, the movable sprocket 54a and the screw rod (1) installed at one lower side of the screw rod 40 ( Bevel gear 55a for connecting 40, drive sprocket 51a connected with movable sprocket 54a and chain 53a, motor 56 for forward and reverse rotation of drive sprocket 51a, first win The sensor 57 is configured to sense the lifting operation of the steel bar 30 to stop the motor 56. At this time, the sensor 57 is installed on the upper and lower portions of the support bar 20, the cover 1 is provided with a control box 58 for controlling the motor 56.

Referring to the operation of another embodiment of this drive means 50 is as follows. That is, when the up or down switch provided in the control box 58 is 'on', the motor 56 and the driving sprocket 51a are driven, and at the same time, the movable sprocket 51a and the movable sprocket connected by the chain 53a ( 54a) is driven, and as a result, the bevel gear 55a drives the screw rod 40, so that the first elevating rod 30 is elevated. At this time, when the first lifting bar 30 is raised or lowered to the maximum by the set height, the sensor 57 detects this and automatically stops the motor 56.

The second elevating rod (60) is ascending and descending at the same height as the first elevating rod (30) through the lifting operation of the first elevating rod (30), the lowering wire (70) (80), Wire holes 60a and 60b penetrate the upper and lower sides of the second elevating rod 60, as shown in FIG. 5, and the lowering wire 80 is formed on both upper sides of the second elevating rod 60. 2 lifting rods 30, 60 is a contact preventing piece 120 to prevent contact with the outer surface is attached by screwing. At this time, both sides of the contact preventing piece 12 is formed with a wire groove 121 to which the falling wire 80 is fitted.

The lifting wire 70 is to raise the second lifting bar 60 at the same time at the same time during the lifting operation of the first lifting bar 30, this lifting wire 70 is the second lifting bar as shown in FIG. After passing through the gap between the first elevating bar 30 and the second elevating bar 60 in the state penetrating the wire hole 60b perforated in the lower portion of the 60, the two sides of the guide guide again Both ends of the roll 31 are respectively fixed to the wire fixing bolt 22.

Therefore, when the screw rod 40 is driven clockwise in the state where the first lifting bar 30 is lowered as shown in FIG. 4A, the first lifting bar 30 is raised as shown in FIG. 4B, and the first lifting bar ( Since the ascending guide roll 31 fixed to 30 rises at the same time, the second elevating rod 60 by the ascending wire 70 wound through the lower guide rod 31 through the lower portion of the second elevating rod 60. ) Will rise to the same height at the same time as the first lifting bar (30).

The lowering wire 80 is to lower the second lifting bar 60 at the same height at the same time during the lowering operation of the first lifting bar 30, this lowering wire 80 is the second lifting bar as shown in FIG. Penetrated through the wire hole (60a) in the upper portion of the 60, both sides enter the gap between the first elevating rod 30 and the support rod 20 and exited back to the upper state while wound on the lower guide roll (32) After that, both ends thereof are fixed to the wire fixing bolt 23 in a state of passing through the wire hole 24 of the wire fixing tool 21.

Therefore, when the screw rod 40 is driven counterclockwise in the state in which the first lifting bar 30 is raised as shown in FIG. 4B, the first lifting bar 30 is lowered as shown in FIG. 4A, and the first lifting bar ( Since the lowering guide roll 32 installed in the 30 is lowered at the same time, the second elevating rod (60) by the lowering wire (80) wound on the lowering guide roll 32 through the upper portion of the second elevating rod (60) At the same time as the first lifting bar 30, it is lowered to the same height.

Meanwhile, as shown in FIGS. 8A to 8C, the channel steel 61 is fixed to the upper end of the second lifting bar 60, and the shaft bolt 62 is formed on the channel steel 61 at the bottom of the pedestal 90. An angle adjusting device 91 is rotatably connected to one side, and an arc long hole 92 is formed at one side of the angle adjusting hole 91, and the rotation angle of the pedestal 90 is fixed to the arc long hole 92. The fixing lever 93 is fitted and screwed.

This is for the user to arbitrarily adjust the inclination angle of the pedestal 90 arbitrarily according to the need. The fixing lever 93 is released and again in a state in which the inclination angle of the pedestal 90 is properly adjusted as shown in FIG. 8C. When the locking lever 93 is turned and locked, the pedestal 90 maintains the adjusted inclination angle.

Referring to the overall operating relationship of the present invention configured as described above in detail.

First, when the steering wheel 52 is turned clockwise or the lift switch of the control box 58 is 'on' to drive the motor 56 in the forward direction, the drive sprockets 51, 51a, and the chain 53, 53a. The first lifting bar is driven by the nut member 30a which is driven by the screw rod 40 through the movable sprockets 54 and 54a and the bevel gears 55 and 55a. As shown in FIG. 4B, as the 30 is raised, the second lifting bar 60 is also raised to the same height as the first lifting bar 30 by the rising wire 70.

At this time, the first lifting bar 30 is raised only until the locking hole 33 formed in the upper portion is locked to the control bar 131. That is, when the first elevating rod 30 is raised to the maximum, the intermittent rod 131 slides into the engaging hole 33 along the inclined surface 33a, so that the locking is made. Ascension is prevented.

When the motor 56 is used, the sensor 57 installed on the upper side detects the rising state of the first lifting bar 30, and automatically raises the motor 56 when the first lifting bar 30 rises to the maximum height. Stop it.

Next, by turning the handle 52 counterclockwise or by turning the lower switch of the control box 58 to drive the motor 56 in the reverse direction, the drive sprockets 51, 51a and the chain 53 ( 53a), the screw rod 40 is driven backward through the movable sprockets 54, 54a and the bevel gears 55, 55a, and is made by the nut member 30a screwed to the screw rod 40. As the first lifting bar 30 is lowered as shown in FIG. 4A, the second lifting bar 60 is also lowered to the same height as the first lifting bar 30 by the lowering wire 80.

At this time, the first elevating bar 30 is lowered only until the locking hole 33 formed in the lower portion is locked to the control bar 131. That is, when the first elevating rod 30 descends to the maximum, the intermittent rod 131 slides into the engaging hole 33 along the inclined surface 33a, so that the locking is made. Descent is prevented.

When the motor 56 is used, the sensor 57 installed at the lower side detects the lowering state of the first lifting bar 30, and automatically moves the motor 56 when the first lifting bar 30 descends to the maximum height. Stop it.

On the other hand, when adjusting the inclination angle of the pedestal 90 as necessary, loosen the fixing lever 93 and in the state of properly adjusting the inclination angle of the pedestal 90 by turning the fixing lever 93 again to lock the pedestal 90 Maintains the adjusted tilt angle.

Therefore, the present invention can conveniently and easily adjust the height of the projector stand 90 and the user can conveniently adjust the inclination angle of the stand 90, in using the projector stand 90 User convenience can be increased.

In addition, the present invention, since a plurality of casters 11 is installed on the base 10 can be used while conveniently moving the pedestal 90.

As described above, the present invention is a very useful invention that allows the user to conveniently and easily adjust the height of the projector stand, and also to easily adjust the angle of the stand.

Claims (7)

A base 10 provided with several casters 11; A support rod 20 fixed vertically to the base 10 to which wire fixing tools 21 are attached at both upper sides thereof; A first elevating rod 30 fitted into the support rod 20 and having a pair of ascending and descending guide rolls 31 and 32 installed on both upper and lower sides thereof; A screw rod (40) installed in the support rod (20) to elevate the first elevating rod (30); Drive means 50 for driving the screw rod 40; A second elevating bar 60 inserted into the first elevating bar 30; Both ends of the second elevating rod (60) through the ascending guide roll (31) is fixed to the wire fixing tool (21) to raise the second elevating rod (60) at the same time when the first elevating rod (30) A rising wire 70; Both ends of the second elevating rod (60) through the lowering guide roll (32) is fixed to the wire fastener (21) to lower the second elevating rod (60) at the same time when the first elevating rod (30) Descending wire 80; Projector pedestal height adjustment device comprising a pedestal 90 is installed on the upper portion of the second lifting bar (60). According to claim 1, wherein the support rod 20, the first and second elevating rods 30, 60 is composed of a square pipe, the upper surface of the support rod 20, the first elevating rod 30, the leaf spring Receiving the elasticity of the 100, the first lifting bar 30, a pair of flow preventing rolls 101 in close contact with the outer surface of the second lifting bar 60 is installed, respectively, the first and second lifting bar 30 Projector pedestal height adjustment is characterized in that the lower surface of each of the 60 is provided with a flow preventing roll 111 in close contact with the inner surface of the support rod 20, the first elevating rod 30 while receiving the elasticity of the leaf spring 110 Device. According to claim 1, The drive means 50 is a drive sprocket 51 arranged on one side of the support rod 20, the handle 52 for driving the drive sprocket 51, the lower side of the screw rod 40 Projector stand, characterized in that consisting of a movable sprocket 54 is connected to the drive sprocket 51 and the chain 53, the bevel gear 55 to connect the movable sprocket 54 and the screw rod 40 Height adjustment device. The bevel gear (55a) of claim 1, wherein the driving means (50) connects the movable sprocket (54a), the movable sprocket (54a), and the screw rod (40) installed at one lower side of the screw rod (40). By detecting the lifting operation of the driving sprocket 51a connected to the movable sprocket 54a and the chain 53a, the motor 56 for forward and reverse rotation of the driving sprocket 51a, and the first lifting bar 30, the motor Projector stand height adjustment device, characterized in that consisting of a sensor (57) to stop (56). The contact preventing piece 120 of claim 1, wherein the lower wires 80 are prevented from contacting the outer surfaces of the first and second lifting bars 30 and 60 on both sides of the second lifting bar 60. Projector support height adjustment device characterized in that attached. The method of claim 1, wherein the engaging hole 33 having the inclined surface 33a is drilled on one side of the first lifting bar 30, the lower side of the support bar 20, the elasticity of the spring 130 on the upper side of the support rod 20 Projector stand height adjustment device, characterized in that the locking rod 131 is installed in the locking hole 33 is installed. The upper end of the second elevating rod (60) is fixed to the channel steel (61), the bottom of the pedestal 90 is connected to the channel steel (61) rotatably connected to the shaft bolt (62). An angle adjusting device 91 is attached, and an arc-shaped hole 92 is formed at one side of the angle adjusting device 91, and a fixing lever 93 fixing the rotation angle of the pedestal 90 to the arc-shaped hole 92. Projector stand height adjustment device characterized in that the screw is coupled.