JP3233085U - Monitor arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly convenient monitor arm capable of locking a support column in a non-shrinkable manner, releasing the lock by a simple operation, and adjusting the height position of a monitor through expansion and contraction of the support column. SOLUTION: An inner pipe 31 and an outer pipe 32 are elements, and the columns extend in the vertical direction, and the upper element of the other is moved up and down with respect to the lower element of one of them to expand or contract the length thereof. 3, a bracket 4 that is attached to the upper element of the support column and can support the monitor M, a switch 331 that is exposed at the upper end of the upper element of the support column and moves up and down with respect to the support column, and inside the support column. An unlock pipe that moves up and down with respect to the support column as the switch moves up and down, and locks the upper element with respect to the lower element so that the support column does not contract, and when the unlock pipe descends with respect to the support column. A monitor arm 1 including a lock mechanism for releasing the lock was configured. [Selection diagram] Fig. 1

Description

The present invention relates to a monitor arm used to support a monitor (or a display, a display device, including a tablet computer, a smartphone, etc. having an outer shape integrated with the monitor).

A monitor arm is known in which a bracket is provided on a support column extending from a support fixed to a desk top plate or the like, a monitor is fixed to the bracket, and the monitor is supported and held in a floating position (for example, the following non-identification). See Patent Document 1). The use of this type of monitor arm has the advantage that the space on the top plate is wider than when the monitor is placed on the top plate of the desk.

"Monitor Arm", KOKUYO General Catalog 2020 Furniture Edition, KOKUYO Co., Ltd., Reiwa December 1st, p. 177

The present invention is to provide a highly convenient monitor arm that can lock the support column without contraction, can release the lock with a simple operation, and can adjust the height position of the monitor through expansion and contraction of the support column. ..

In the present invention, the inner pipe and the outer pipe into which the inner pipe is inserted are elements, and the upper element that is the other of the inner pipe and the outer pipe is the lower element that is one of the inner pipe and the outer pipe. A strut that expands and contracts its length by moving up and down, a bracket that is attached to the upper element of the strut and can support the monitor, and a strut that is exposed at the upper end of the upper element of the strut and is operated by the user. A switch that moves up and down with respect to the support, an unlock pipe that is arranged in the support column and moves up and down with respect to the support column, and an upper element that locks the lower element so that the support column does not contract. At the same time, a monitor arm including a lock mechanism for releasing the lock when the unlock pipe descends with respect to the support column is configured.

The locking mechanism is, for example, a center shaft arranged in the support column, supported by the lower element of the support column and extending toward the upper element, and arranged in the support column, and the lower end portion thereof is fixed to the upper element. The upper end thereof moves up and down with respect to the support column together with the unlock pipe, and has a clamp chain through which the center shaft is inserted. By bringing the clamp chain into close contact with the outer peripheral surface of the center shaft. The outer peripheral surface of the clamp chain and the center shaft is locked so that the support column does not shrink, and the vertical width of the clamp chain is reduced when the switch and the unlock pipe are lowered with respect to the support column in response to an operation by the user. The gap with and is widened and the lock is released.

The bracket is preferably rotatable about an axis that intersects the axis of the strut. Then, the direction in which the monitor faces, that is, the posture of the monitor can be tilted up and down according to the user's discretion. As a specific example of the structure for that purpose, the bracket is provided with a base portion to be attached to the support column with a spacer interposed between the bracket and the upper element of the support column, and a mounting portion to which the monitor is fixed and supports the base portion. An elongated hole is formed into which a convex portion protruding outward from the spacer is inserted.

In addition, a braking knob having a screw screwed to the upper element of the support column is provided, and the posture of the bracket can be restrained by sandwiching the base of the bracket between the knob and the spacer. Is more preferable.

If the rotating shaft provided at the lower end of the lower element of the support is inserted into the bearing provided on the support supporting the support and the support can rotate around its axis, the monitor is horizontal. It can be swiveled to change its orientation as desired.

While the bush is press-fitted into the bearing, a ring is fitted on the outer circumference of the rotating shaft, and the ring is caught by the bush when the rotating shaft inserted into the bearing is to be pulled out from the bearing to prevent it from coming off. If adopted, the number of parts will not increase unnecessarily.

According to the present invention, it is possible to realize a highly convenient monitor arm in which the support column can be locked without contraction, the lock can be released by a simple operation, and the height position of the monitor can be adjusted through expansion and contraction of the support column.

The perspective view of the monitor arm of one Embodiment of this invention. The perspective view of the support column and the bracket of the monitor arm of the same embodiment as seen from the back side. A side view of the monitor arm of the same embodiment. A side view of the monitor arm of the same embodiment. The side view of the support column and the bracket of the monitor arm of the same embodiment. The side view of the support column and the bracket of the monitor arm of the same embodiment. A side view of the monitor arm of the same embodiment. A vertical cross-sectional view of the monitor arm of the same embodiment along the AA line. A vertical cross-sectional view of the monitor arm of the same embodiment along the AA line. FIG. 6 is an enlarged vertical sectional view taken along line AA showing the locking mechanism of the monitor arm of the same embodiment. FIG. 6 is an enlarged vertical sectional view taken along line AA showing the rotating shaft and bearing of the monitor arm of the same embodiment. A'-A'line vertical cross-sectional view of the monitor arm of the same embodiment. BB line cross-sectional view of the monitor arm of the same embodiment.

An embodiment of the present invention will be described with reference to the drawings. In the monitor arm 1 of the present embodiment shown in FIGS. 1 to 13, a bracket 4 for supporting the monitor M is provided on a stretchable support column 3 extending in the vertical direction from the support body 2. be.

The support 2 has a clamp 21 as a base, which is fixed to the top plate T or the like by sandwiching the top plate T or a shelf plate of the desk, and a leg 22 connected to the clamp 21. I have. The leg 22 is made of a side view crank-shaped pipe material that stands upright from the clamp 21, bends and extends in the front-rear direction, and then bends again and extends upward. Then, the lower end portion of the support column 3 is connected to the upper end portion thereof.

The support column 3 has a telescopic structure in which the inner pipe 31 which is a lower element is inserted into the outer pipe 32 which is an upper element from below, extends in the vertical direction, and the outer pipe 32 moves up and down with respect to the inner pipe 31. By expanding and contracting its length. The bracket 4 that supports the monitor M is attached to the outer pipe 32 thereof.

As shown in FIG. 11, a rotating shaft 311 is provided at the lower end of the inner pipe 31 of the support column 3. The rotating shaft 311 is inserted from above into the bearing 23 provided at the upper end of the leg 22 of the support 2. A cylindrical bush 231 is press-fitted into the bearing 23. A plurality of bushes 231 are divided into upper and lower parts. On the other hand, a ring 312 that projects slightly outward from the outer peripheral surface of the rotating shaft 311 is fitted to the intermediate portion in the vertical direction. When the rotating shaft 311 is fitted into the bearing 23 in order to connect the support column 3 to the leg 22, the outer circumferences of the upper and lower portions of the rotating shaft 311 that do not fit the ring 312 are brought into close contact with the inner circumferences of the upper and lower bushes 231. At the same time, the ring 312 is arranged at an intermediate height between the upper and lower bushes 231 and more specifically directly below the upper bush 231. When the support column 3 is to be pulled out upward from the leg 22, the ring 312 is caught by the upper bush 231 to prevent the support column 3 from coming off.

The rotating shaft 311 of the support column 3 can slide with respect to the bearing 23 (bush 231) of the leg 22. That is, the support column 3 can rotate about the axis of the leg 22, that is, about the vertical axis. By rotating the support column 3, the monitor M supported by the bracket 4 can be rotated to change its direction to the left or right.

Further, the leg 22 can also rotate with respect to the clamp 21 around the axis of the lower end portion connected to the clamp 21, that is, around the vertical axis. Utilizing this, as shown in FIG. 3, a mode in which the monitor M faces the user (left side in the figure) while positioning the support column 3 and the monitor M further back (right side in the figure) when viewed from the user. And, as shown in FIG. 7, the mode in which the monitor M faces the user while positioning the support column 3 and the monitor M in front of the user (left side in the figure) can be selectively taken.

The bracket 4 extends in the front-rear direction that intersects (particularly, orthogonally) with the attachment portion 41 that faces the front direction toward which the monitor M faces and is joined to the back surface of the monitor M, and is an outer pipe of the support column 3. It includes a base 42 attached to 32. As shown in FIGS. 1, 2 and 13, the bracket 4 has a shape in which a substantially rectangular sheet metal material in front view is bent and the upper and lower middle portions on both the left and right sides are bent rearward. The refracted portion becomes a base portion 42 that is paired to the left and right, and the remaining portion is a mounting portion 41 that is paired vertically and extends outward from the base portion 42.

Insertion holes 411 penetrating the attachment portion 41 are formed on both the left and right sides of the attachment portion 41. When fixing the bracket 4 to the monitor M, as shown in FIGS. 2 to 7, the shaft portion on which the male thread of the screw 43 is cut is inserted into the insertion hole 411 from the rear to the front of the attachment portion 41. , The shaft portion of the screw 43 is screwed into a nut hole (not shown) provided on the back surface of the monitor M and tightened.

A decorative cover 44 that hides the attachment portion 41 and the screw 43 can be additionally attached to the bracket 4. As shown in FIGS. 1, 2, 8, 9, 12, and 13, the decorative cover 44 has a size capable of covering the entire area of the attachment portion 41 in the rear view. The decorative cover 44 is formed with two parallel grooves 441 extending upward from its lower edge so as to cut out. The groove 441 exists to pass the base 42 of the bracket 4, and the distance between the left and right paired grooves 441 corresponds to the distance between the left and right paired bases 42. After fixing the attachment portion 41 to the back surface of the monitor M, insert the decorative cover 44 from above so that the base portion 42 is inserted into the groove 441, and if the decorative cover 44 is brought into contact with or close to the back surface of the attachment portion 41, it will be attached to the bracket 4. A decorative cover 44 is attached, which conceals the base 42 and the screw 43.

In addition, another member (not shown) may be fixed to the attachment portion 41, and the member may support the monitor M. For example, a holder (not shown) capable of holding a tablet computer or the like (not shown, which is also a type of monitor) is fixed to the attachment portion 41, and the holder holds the tablet computer or the like. Therefore, it is conceivable to take a form of indirectly supporting a tablet computer or the like.

As shown in FIGS. 1, 2, 8, 9, 12, and 13, each of the pair of left and right bases 42 expands in the vertical direction, and the outer pipe 32 of the support column 3 is inserted between them. .. Then, the base 42 is attached to the outer pipe 32. Although the base 42 has an upright flat plate shape, the outer pipe 32 has a cylindrical shape.

Therefore, the spacer 5 is interposed between the inner surface of the base 42 and the outer peripheral surface of the outer pipe 32. A pair of spacers 5 are present on the left and right together with the base 42, and the outward surface in contact with the inner surface of the base 42 is planar (except for the boss 51 described later), and the inward surface in contact with the outer peripheral surface of the outer pipe 32 is a flat surface. It has a combined partial cylindrical shape.

As shown in FIGS. 1 to 9 and 12, the attachment portion 41 of the bracket 4 is formed with three elongated holes 421 and 422 penetrating the attachment portion 41. Each of the elongated holes 421 and 422 has a partial arc shape that extends in the vertical direction in the side view, and the centers of the arcs are substantially coincident with each other.

In the spacer 5, the boss, which is a convex portion protruding outward from the outward surface of the spacer 5, is located at a portion corresponding to the upper and lower two 421 of the three elongated holes 421 and 422 of the side view attachment portion 41. 51 is integrally molded. A hole is formed in the boss 51 to penetrate the boss 51 and the spacer 5. Further, a through hole 52 penetrating the spacer 5 is formed in a portion of the spacer 5 corresponding to an intermediate elongated hole 422 of the side view attachment portion 41.

In addition, nut holes 3211 and 3212 are formed in the outer pipe 32 at locations overlapping the holes and through holes 52 in the boss 51 of the side view spacer 5.

When attaching the bracket 4 to the outer pipe 32 of the support column 3, as shown in FIGS. 8, 9 and 12, a boss 51 protruding from the spacer 5 is placed inward in the upper and lower elongated holes 421 of the base 42 of the bracket 4. The base portion 42 of the bracket 4 is attached to the outward surface of the spacer 5 so that the elongated hole 422 in the middle of the base portion 42 and the through hole 52 in the middle of the spacer 5 are overlapped with each other in a side view. Next, the spacer 5 is attached to the outer periphery of the outer pipe 32 so that the nut holes 3211 and 3212 of the outer pipe 32 and the holes and the through holes 52 in the boss 51 of the spacer 5 are overlapped with each other in a side view.

Then, the male-threaded shaft portion of the washer-equipped bolt 6 is inserted into the elongated hole 421 of the bracket 4 and the hole in the boss 51 of the spacer 5 from the outside, and screwed into the nut hole 3211 of the outer pipe 32. Tighten together. The head or washer of the bolt 6 prevents the boss 51 of the spacer 5 from coming out of the elongated hole 421 of the base 42 of the bracket 4.

Further, the male-threaded shaft portion of the knob 7 is inserted into the elongated hole 422 of the bracket 4 and the through hole 52 of the spacer 5 from the outside, and screwed into the nut hole 3212 of the outer pipe 32 to tighten the knob 7. The head of the knob 7 sandwiches the base portion 42 of the bracket 4 with the spacer 5 (and thus the outer pipe 32), thereby retaining the bracket 4 with respect to the outer pipe 32 of the support column 3.

The bracket 4 that supports the monitor M can rotate about a horizontal axis that intersects (particularly, orthogonally) the vertical axis that is the axis of the support column 3. The central axis of rotation of the bracket 4 coincides with the center of the arc of the elongated holes 421 and 422 having a circular arc shape in the side view portion formed in the attachment portion 41. Utilizing this, the monitor M is tilted backward so as to face upward from the horizontal as shown in FIG. 5, or the monitor M is tilted forward so as to face downward from the horizontal as shown in FIG. , Swinging motion is possible.

When you want to change the posture of the bracket 4, in other words, the direction of the monitor M up and down, once rotate the knob 7 in the opposite direction so that its head separates from the base 42 of the bracket 4 and the outer pipe 32 of the support column 3. Displace to. That is, the tightening by the knob 7 is loosened. Then, the retention of the bracket 4 with respect to the support column 3 is released, and the bracket 4 and the monitor M are allowed to rotate about the horizontal axis. Then, after the bracket 4 and the monitor M are in the desired postures, the knob 7 is rotated in the forward direction again to displace the head portion of the bracket 4 so as to approach the base 42 of the bracket 4 and the outer pipe 32 of the support column 3. Let me. As a result, the base 42 of the bracket 4 is sandwiched between the head of the knob 7 and the spacer 5, that is, the knob 7 is tightened, and the bracket 4 and the monitor M are immovably held with respect to the support column 3.

The support column 3 of the monitor arm 1 of the present embodiment can expand and contract in the vertical direction along the vertical axis which is the axis thereof. By expanding and contracting the support column 3, the height position of the monitor M supported by the bracket 4 can be flexibly changed. The support column 3 has a built-in lock mechanism that can lock the outer pipe 32 with respect to the inner pipe 31 so that the support column 3 does not shrink. Hereinafter, the locking mechanism included in the monitor arm 1 will be described in detail.

As shown in FIGS. 8 to 10, 12 and 13, the outer pipe 32, which is the upper element of the support column 3, has a double structure consisting of the outer pipe body 321 and the elevating pipe body 322 inside the outer pipe body 321. ing. Both the outer pipe body 321 and the elevating pipe body 322 are made of a cylindrical pipe material extending in the vertical direction. The elevating pipe body 322 is arranged so as to have the same axis as the outer pipe body 321. The outer pipe body 321 and the elevating pipe body 322 are connected at the upper end thereof by a coupling pin 323 penetrating the two, and are integrated so as not to be displaced relative to each other. In addition, a retainer 324 having a dish-shaped outer shape that is open upward is provided on the outer pipe body 321 and the elevating pipe body 322. The retainer 324 is coupled with the outer pipe body 321 and the elevating pipe body 322 by the coupling pin 323, and is integrated with these as a part of the outer pipe 32.

The inner pipe 31, which is the lower element of the support column 3, is made of a cylindrical pipe material extending in the vertical direction. The inner pipe 31 is inserted into the space between the outer pipe body 321 and the elevating pipe body 322 that construct the outer pipe 32. A guide cap 313 whose outer diameter substantially matches the inner diameter of the outer pipe body 321 and whose inner diameter substantially matches the outer diameter of the elevating pipe body 322 is attached to the upper end portion of the inner pipe 31. When the outer pipe 32 moves up and down with respect to the inner pipe 31 so as to expand and contract the support column 3, the outer peripheral surface of the guide cap 313 slides with the inner peripheral surface of the outer pipe body 321 and / or the guide cap 313. The inner peripheral surface of the pipe slides with the outer peripheral surface of the elevating pipe body 322 to guide the outer pipe 32.

Further, a guide cap 325 is also attached to the lower end of the outer pipe body 321 so that its inner diameter substantially matches the outer diameter of the inner pipe 31 and closes the gap between the outer pipe body 321 and the inner pipe 31. When the outer pipe 32 moves up and down with respect to the inner pipe 31 so as to expand and contract the support column 3, the inner peripheral surface of the guide cap 325 slides with the outer peripheral surface of the inner pipe 31 to guide the outer pipe 32.

Inside the elevating pipe body 322 of the outer pipe 32, an unlock pipe 33 is arranged so as to have the same axis as the elevating pipe body 322. The unlock pipe 33 is also made of a cylindrical pipe material extending in the vertical direction. The unlock pipe 33 is a member driven to switch between locking and unlocking by the locking mechanism, and moves up and down relative to the outer pipe 32 (the outer pipe body 321 and the elevating pipe body 322). Therefore, a slot 333 that is opened and expanded in the vertical direction is bored in the peripheral wall of the upper end portion of the unlock pipe 33 so as to avoid interference with the coupling pin 323. The coupling pin 323 passes through the upper end of the unlock pipe 33 via the slot 333.

Immediately above the unlock pipe 33, a switch 331, which is a push button that can be pressed by the user, is provided. The switch 331 is fitted into the upper end of the unlock pipe 33 and is integrated with the unlock pipe 33. At the same time, it projects upward from the upper end of the outer pipe 32 through the space inside the retainer 324. A spring 34 is interposed between the switch 331 and the retainer 324 to elastically urge the switch 331 and the unlock pipe 33 upward relative to the outer pipe 32.

At the lower end of the elevating pipe body 322, a slider 326 that closes the opening below the elevating pipe body 322 is attached. Further, a slider 332 that closes the opening below the unlock pipe 33 is also attached to the lower end of the unlock pipe 33. The slider 332 on the unlock pipe 33 side is located in the elevating pipe body 322 and above the slider 326 on the elevating pipe body 322 side.

Inside the inner pipe 31, a rod-shaped center shaft 314 extending upward toward the outer pipe 32 is established. The lower end of the center shaft 314 is fixed and supported by the lower end of the inner pipe 31, and is integrated with the inner pipe 31. The center shaft 314 penetrates the shaft holes of the guide cap 325, the slider 326, and the slider 332, and enters the elevating pipe body 322 and the unlock pipe 33 from below.

The center shaft 314, together with the following clamp chain 8, constitutes a locking mechanism for the support column 3 of the monitor arm 1 of the present embodiment. As shown in FIG. 10, the clamp chain 8 includes a plurality of link pins 81 that extend in the front-rear direction that intersects the vertical direction in which the center shaft 314 extends and that oppose (parallelize) along the left-right direction. A link member 82 that connects the link pins 81 to each other is connected vertically in a plurality of stages. The clamp chain 8 is located in the elevating pipe body 322, particularly in the space sandwiched between the upper and lower sliders 332 and 326. The upper end of the clamp chain 8 is moored to the slider 332 on the unlock pipe 33 side. On the other hand, the lower end of the clamp chain 8 is moored to the slider 326 on the elevating pipe body 322 side.

The center shaft 314 is inserted between the link pins 81 facing the left and right sides of the clamp chain 8. The outer circumference of the center shaft 314 facing the clamp chain 8 is prismatic.

When no operating force is applied to the switch 331, the upward elastic urging force applied by the spring 34 to the switch 331 causes the switch 331 and the unlock pipe 33 integrated with the switch 331 as shown in FIGS. 8 and 12. However, it moves relatively upward with respect to the outer pipe 32 of the support column 3. Along with this, the separation distance between the slider 332 on the unlock pipe 33 side and the slider 326 on the elevating pipe body 322 side increases in the vertical direction. Then, the clamp chain 8 whose upper and lower end portions are moored to both sliders 332 and 326 is expanded to expand the vertical width thereof, and the locked state shown in the left figure of FIG. 10 is obtained.

In the locked state, the link member 82 of the clamp chain 8 is tilted so as to approach from horizontal to vertical, and the pair of link pins 81 facing each other with the center shaft 314 in between are in close contact with the outer peripheral surface of the center shaft 314, and each link pin 81 is in close contact with the outer peripheral surface of the center shaft 314. A strong frictional force is generated between the center shaft 314 and the center shaft 314. Therefore, the downward movement of the clamp chain 8, the unlock pipe 33, and the elevating pipe body 322 with respect to the center shaft 314 is stopped, the outer pipe 32 cannot descend with respect to the inner pipe 31, and the support column 3 does not contract and the monitor M The height position of the pipe is kept constant. Even if the outer pipe 32 tries to descend with respect to the inner pipe 31, if the elevating pipe body 322 slides down, the distance between the slider 326 and the slider 332 on the unlock pipe side 33 increases, and the clamp chain 8 becomes It is stretched up and down and this is entwined with the center shaft 314. The clamp chain 8 itself also incorporates a spring (not shown) that elastically biases the clamp chain 8 so as to extend it up and down. As a whole, the outer pipe 32 and the monitor M can be maintained at a constant height position against the weight of the monitor M supported by the outer pipe 32 and the bracket 4.

A user who desires to contract the support column 3 to adjust the height of the monitor M to a lower position is an operation of grasping the outer pipe 32 of the support column 3 and pressing the switch 331 exposed at the upper end portion thereof with his / her fingers. I do. Then, as shown in FIG. 9, the switch 331 and the unlock pipe 33 descend relative to the outer pipe 32 of the support column 3 against the elastic urging force exerted by the spring 34. As a result, the separation distance between the slider 332 on the unlock pipe 33 side and the slider 326 on the elevating pipe body 322 side in the vertical direction is shortened. Then, the clamp chain 8 is folded and its vertical width is reduced to the unlocked state shown in the right figure of FIG.

In the unlocked state, the link member 82 of the clamp chain 8 collapses from more vertical to horizontal, and the gap between the pair of link pins 81 facing each other across the center shaft 314 and the outer peripheral surface of the center shaft 314 expands. The frictional force between each link pin 81 and the center shaft 314 is lost. Therefore, the clamp chain 8, the unlock pipe 33, and the elevating pipe body 322 are allowed to move downward with respect to the center shaft 314, and the outer pipe 32 can be lowered with respect to the inner pipe 31.

As shown in FIGS. 8, 9 and 12, the outer pipe 32 is relative to the inner pipe 31 between the slider 326 of the elevating pipe body 322 of the outer pipe 32 and the rotation shaft 311 of the inner pipe 31. A spring 35 that elastically biases upward is provided therein. When the outer pipe 32 is pushed down against the inner pipe 31 against the elastic urging force exerted by the spring 35 in a state where the lock by the lock mechanism is released by pressing the switch 331, FIGS. 4 and 12 show. As shown, the total length of the support column 3 contracts, and the monitor M and the bracket 4 supporting the monitor M descend.

A user who desires to extend the support column 3 to adjust the height of the monitor M to a higher position may grasp the outer pipe 32 of the support column 3 and pull it up so as to raise it with respect to the inner pipe 31. .. At this time, the switch 331 does not have to be pressed (of course, the switch 311 may be pressed). In the process of the outer pipe 32 trying to rise, the elevating pipe body 322 slides up and the distance between the slider 326 and the slider 332 on the unlock pipe side 33 decreases, so that the clamp chain 8 stretched up and down becomes It shrinks to fold and naturally transitions from the locked state to the unlocked state. As a result, the clamp chain 8, the unlock pipe 33, and the elevating pipe body 322 are allowed to move upward with respect to the center shaft 314, and the outer pipe 32 can be raised with respect to the inner pipe 31. As shown, the total length of the support column 3 is extended, and the monitor M and the bracket 4 supporting the monitor M are levitated.

Incidentally, a cable guide (cable holder) 315 for holding or bundling a cable (cord) or the like connected to the monitor M is attached to a portion below the inner pipe 31 of the support column 3. The cable guide 315 has a substantially C-shape in a plan view, and can hold a target cable or the like.

In the present embodiment, the inner pipe 31 and the outer pipe 32 into which the inner pipe 31 is inserted are used as elements and extend in the vertical direction with respect to the lower element 31 which is one of the inner pipe 31 and the outer pipe 32. The other upper element 32 moves up and down to expand or contract its length, a bracket 4 attached to the upper element 32 of the support 3 and capable of supporting the monitor M, and an upper element of the support 3. A switch 331 that is exposed at the upper end of the 32 and moves up and down with respect to the support column 3 in response to an operation by the user, and a switch 331 arranged in the support column 3 that moves up and down with respect to the support column 3 as the switch 331 moves up and down. An unlock pipe 33 and a lock mechanism that locks the upper element 32 with respect to the lower element 31 so that the support column 3 does not contract, and releases the lock when the unlock pipe 33 descends with respect to the support column 3. The monitor arm 1 provided with the above was configured.

According to the present embodiment, the support column 3 can be locked without contraction, the lock can be released by a simple and natural operation, and the height position of the monitor M can be adjusted through the contraction of the support column 3, which is a highly convenient monitor arm. 1 is embodied.

The locking mechanism is arranged in the support column 3, supported by the lower element 31 of the support column 3 and extends toward the upper element 32, and is arranged in the support column 3, and the lower end portion thereof is on the upper element 32. The clamp chain 8 is fixed to the other, and the upper end portion thereof moves up and down with respect to the support column 3 together with the unlock pipe 33, and has a clamp chain 8 through which the center shaft 314 is inserted. The support column 3 is locked so as not to contract by being in close contact with the outer peripheral surface of the center shaft 314, and the clamp chain is operated when the switch 331 and the unlock pipe 33 are lowered with respect to the support column 3 in response to an operation by the user. While the vertical width of 8 is reduced, the gap between the clamp chain 8 and the outer peripheral surface of the center shaft 314 is expanded to release the lock.

The bracket 4 is rotatable around an axis that intersects the axis of the support column 3. Therefore, the direction in which the monitor M faces, that is, the posture of the monitor M can be tilted up and down according to the user's discretion. Therefore, in the present embodiment, the bracket 4 is attached to the support column 3 with the spacer 5 interposed between the bracket 4 and the upper element 31 of the support column 3, and the attachment portion to which the monitor M is fixed and supported. 41 is provided, and an elongated hole 421 in which a convex portion 51 projecting outward from the spacer 5 is inserted is formed in the base portion 42 thereof.

In addition, a braking knob 7 having a screw screwed to the upper element 32 of the support column 3 is provided, and the base portion 42 of the bracket 4 is sandwiched between the knob 7 and the spacer 5. It is more preferable to be able to retain the posture of the bracket 4.

A rotating shaft 311 provided at the lower end of the lower element 31 of the support column 3 is inserted into a bearing 23 provided on a support 2 that supports the support column 3, and the support column 3 can rotate around its axis. Therefore, the monitor M can be rotated horizontally to change its direction arbitrarily.

In the present embodiment, while the bush 231 is press-fitted into the bearing 23, the ring 312 is fitted to the outer periphery of the rotating shaft 311 and the ring is pulled out from the bearing 23 when the rotating shaft 311 inserted into the bearing 23 is pulled out. The 312 adopts a structure in which the bush 231 is caught and prevented from coming off. As a result, it is not necessary to increase the number of parts unnecessarily.

The present invention is not limited to the embodiment described in detail above. For example, in the above embodiment, the legs 22 which are the elements of the support 2 have a side view crank shape, but the shape of the legs may be an upright shape without refraction.

It is not essential that the legs 22 of the support 2 are rotatable relative to the base clamp 21 about the axis. Further, it is not essential that the support column 3 (lower element 31) can rotate relative to the leg 22 supporting the support column 3 (lower element 31) around the axis.

In the above embodiment, the upper element of the support column 3 is the outer pipe 32, and the lower element is the inner pipe 31 inserted therein. However, the internal / external relationship between the upper element and the lower element of the support column 3 is the above-described embodiment. It may be the opposite of the form. For example, a structure is conceivable in which the outer pipe body 321 in the above embodiment is omitted, only the elevating pipe body 322 is used as the upper element of the support column 3, and the bracket 4 is attached to the upper element.

The lock mechanism mounted on the support column 3 is not limited to the one using the clamp chain 8. Of course, it is also possible to configure the lock mechanism by adopting a known gas spring or the like.

In addition, the specific configuration of each part can be modified without departing from the gist of the present invention.

1 ... Monitor arm 2 ... Support 23 ... Bearing 231 ... Bush 3 ... Strut 31 ... Lower element (inner pipe)
311 ... Rotating shaft 312 ... Ring 314 ... Center shaft 32 ... Upper element (outer pipe)
33 ... Unlock pipe 331 ... Switch 4 ... Bracket 41 ... Mounting part 42 ... Base 421 ... Long hole 5 ... Spacer 51 ... Convex part (boss)
7 ... Knob 8 ... Clamp chain M ... Monitor

Claims (6)

The inner pipe and the outer pipe into which the inner pipe is inserted are used as elements, and extend in the vertical direction. The upper element, which is one of the inner pipe and the outer pipe, moves up and down with respect to the lower element. A support that expands or contracts its length,
A bracket that is attached to the upper element of the column and can support the monitor,
A switch that is exposed at the upper end of the upper element of the support column and moves up and down with respect to the support column in response to a user operation.
An unlock pipe that is arranged in the support column and moves up and down with respect to the support column as the switch moves up and down.
A monitor arm including a locking mechanism that locks the upper element with respect to the lower element so that the support column does not contract, and releases the lock when the unlock pipe descends with respect to the support column. The lock mechanism is
A center shaft arranged in the support column, supported by the lower element of the support column, and extending toward the upper element,
It has a clamp chain that is arranged in the strut, its lower end is fixed to an upper element, its upper end moves up and down with respect to the strut together with the unlock pipe, and the center shaft is inserted. Clamp,
When the clamp chain is brought into close contact with the outer peripheral surface of the center shaft to lock the support column so as not to contract, and when the switch and the unlock pipe are lowered with respect to the support column in response to an operation by a user, the clamp chain The monitor arm according to claim 1, wherein the gap between the clamp chain and the outer peripheral surface of the center shaft is expanded while the vertical width of the clamp chain is reduced, and the lock is released. The bracket
A base attached to the strut with a spacer interposed between it and the upper element of the strut,
The monitor is fixed and has a mounting part to support it,
The monitor arm according to claim 1 or 2, wherein an elongated hole is formed in the base thereof into which a convex portion protruding outward from the spacer is inserted, and the monitor arm can rotate about an axis intersecting the axis of the column. A braking knob with a screw screwed onto the upper element of the strut is provided.
The monitor arm according to claim 3, wherein the posture of the bracket is fixed by sandwiching the base portion of the bracket between the knob and the spacer. Claims 1 and 2 that a rotating shaft provided at the lower end of a lower element of the support is inserted into a bearing provided on a support supporting the support, and the support can rotate around its axis. The monitor arm according to 3 or 4. Claim that while the bush is press-fitted into the bearing, a ring is fitted on the outer circumference of the rotating shaft, and the ring is caught by the bush to prevent the rotating shaft inserted into the bearing from coming off when the rotating shaft is pulled out from the bearing. 5. The monitor arm according to 5.

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