machine

Abstract

To provide a movable desk which can stably perform a function to control lock of casters.SOLUTION: A desk is provided with leg parts and a top plate. The leg parts can shift to an unlocked state where they can move by casters and to a locked state that disables movements. The desk is provided with a first displacement part 50, a second displacement part 51, a connection rod, and a switch part. The first displacement part displaces interlockingly with rotation of the top plate rotates. The second displacement part displaces when an operation part 32 is operated. The connection rod operates interlockingly with a displacement when at least either the first displacement part or the second displacement part displaces. The switch part switches the unlocked state and the locked state of the leg parts interlockingly with operation of the connection rod.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a desk having a rotating top. [Background technology]

[0002] There is a desk that has a rotating tabletop and casters, and the casters can be locked or unlocked according to the rotation of the tabletop. Patent Document 1 discloses a desk that can temporarily unlock the casters by operating an operation button located on the back side of the tabletop, in addition to rotating the tabletop. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-63231 A Summary of the Invention [Problem to be solved by the invention]

[0004] The desk described in Patent Document 1 controls the lock state of the casters with one interlocking cam. In other words, the interlocking cam interlocks both the rotation of the tabletop and the operation of the operation button with a device that executes the lock control of the casters. Therefore, the interlocking cam is used frequently and is prone to damage. In addition, since the interlocking cam needs to be interlocked with both the tabletop and the operation button, it has a complex and delicate structure, and there is a high possibility that it will not be able to function due to small damage or deformation.

[0005] An object of the present disclosure is to propose a technology that can stably perform the function of caster lock control. [Means for solving the problem]

[0006] One aspect of the present disclosure is a desk including legs and a tabletop supported by the legs and rotatably supported between a use position and a flip-up position. The legs can transition between an unlocked state in which the tabletop can be moved by casters, and a locked state in which the tabletop cannot be moved. The desk includes a first displacement unit, a second displacement unit, a connecting rod, and a switching unit. The first displacement unit is displaced in conjunction with the rotation of the tabletop. The second displacement unit is displaced when an operating unit that can be operated by a user of the desk is operated. The connecting rod is disposed inside a cylindrical vertical column having a length in the vertical direction of the legs, and operates in conjunction with the displacement of at least one of the first displacement unit and the second displacement unit. The switching unit switches the legs between the unlocked state and the locked state in conjunction with the operation of the connecting rod.

[0007] With this configuration, when the top plate rotates, the first displacement part operates the switching part in conjunction with the first displacement part, while when the operation part is operated, the second displacement part operates the switching part in conjunction with the first displacement part. Therefore, since either the first displacement part or the second displacement part is used to switch between the unlocked state and the locked state, the number of times each displacement part is used is reduced and they are less likely to break compared to when one part is used. In addition, even if the switching function of the switching part 24 using either the first displacement part or the second displacement part becomes unusable due to damage or the like, there is a possibility that the other function can be maintained in a usable state, and the risk of the lock control becoming completely unusable can be reduced. For the above reasons, the function of the lock control of the casters can be stably exerted.

[0008] In one aspect of the present disclosure, the first displacement portion may be fixed to the tabletop so as to be unable to displace relative to the tabletop. With this configuration, the movement of the tabletop can be effectively transmitted to the first displacement portion.

[0009] In one aspect of the present disclosure, the first displacement portion and the second displacement portion may be arranged side by side in the longitudinal direction of the rotation axis of the top plate. With this configuration, the first displacement portion and the second displacement portion can be arranged in a compact and compact state.

[0010] In one aspect of the present disclosure, the desk may include a horizontal column supported by the legs and serving as a rotation center of the tabletop. The first displacement part and the second displacement part may be configured to rotate and displace. The rotation axis of the first displacement part and the second displacement part may be positioned coaxially with the rotation axis of the tabletop. With this configuration, the desk mechanism can be simplified.

[0011] In one aspect of the present disclosure, the first part, which is either the first displacement part or the second displacement part, may be container-shaped. The second part, which is different from the first part, of the first displacement part or the second displacement part may be disposed inside the first part. With this configuration, the first displacement part and the second displacement part can be disposed in a compact and integrated state.

[0012] In one aspect of the present disclosure, the first displacement portion may have a plate-like adjacent portion disposed adjacent to the second displacement portion. A long hole may be formed in the adjacent portion, and the connecting rod may pass through the long hole to be connected to the second displacement portion. When the second displacement portion is displaced to displace the connecting rod, the long hole may be such that the connecting rod does not press an end of the long hole, and when the first displacement portion is displaced, the connecting rod may be displaced by abutting against the end of the long hole.

[0013] With this configuration, even though the first displacement portion and the second displacement portion are adjacent to each other, when the second displacement portion is displaced by operating the operating portion, the connecting rod can be displaced while preventing the top plate from being displaced. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a desk 1 according to an embodiment. [Diagram 2] FIG. 1 is a side view showing a desk 1 according to an embodiment. [Diagram 3] 2 is a perspective view showing the mechanism behind the top plate of the desk 1 according to the embodiment. FIG. [Figure 4] FIG. 2 is a perspective view showing the mechanism on the underside of the top plate of the desk 1 of the embodiment, with a part of the configuration disassembled. [Diagram 5] 5A is a perspective view of a combination of a first displacement portion and a second displacement portion, and FIG. 5B is a perspective view of the combination of the first displacement portion and the second displacement portion from a different viewpoint than that of FIG. 5A. [Figure 6] 6A is a perspective view of the second displacement portion, FIG. 6B is a perspective view of the second displacement portion from a different viewpoint than that of FIG. 6A, and FIG. 6C is a cross-sectional view of the second displacement portion. [Figure 7] FIG. 4 is a perspective view showing only some of the components for explaining a first rod and a first displacement portion. [Figure 8] 4 is a perspective view showing only some of the components for explaining a first rod and a second displacement portion. FIG. [Figure 9] These are figures explaining the operation of the first rod by rotating the top plate, where FIG. 9A is a side view showing the top plate in the use position, FIG. 9B is a side view showing the top plate between the use position and the flip-up position, and FIG. 9C is a side view showing the top plate in the flip-up position. [Figure 10] These are figures to explain the operation of the first rod by operating the operating part, where FIG. 10A is a side view showing a state in which the operating part is not operated, FIG. 10B is a side view showing a state in which the operating part has been operated a certain amount, and FIG. 10C is a side view showing a state in which the operating part has been operated to the end. [Figure 11] This is a view of the top plate from below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. [1. Embodiment] [1-1. Overall composition] The desk 1 shown in FIG. 1 includes a pair of legs 11 and a tabletop 12. In the following description, the configuration of each part may be described using directions such as front-back, left-right, and up-down, but these directions are used merely for convenience of description and do not limit the embodiment of the present disclosure in any way. The above-mentioned directions are based on the user when the user faces the desk 1. In addition, the tabletop 12 rotates as described later, but the directions used in the description are the directions in the use position as shown in FIG. 1.

[0016] The pair of legs 11 are disposed with a gap between them in the left-right direction and support the tabletop 12. Each of the pair of legs 11 is configured to be capable of transitioning between an unlocked state in which movement by the casters 23 is possible, and a locked state in which movement by the casters 23 is impossible.

[0017] Each of the pair of legs 11 has a cylindrical vertical pillar 21 having a length in the up-down direction, and a box-shaped floor member 22 that is arranged at the lower end of the vertical pillar 21, has a length in the front-to-rear direction, and is open downward. Casters 23 are provided below both ends of the floor member 22 in the front-to-rear direction. In other words, each of the pair of legs 11 is provided with two casters 23.

[0018] As shown in FIG. 2, a switching unit 24 is provided inside the floor side member 22. The switching unit 24 switches between the unlocked state and the locked state described above. The switching unit 24 may set the caster 23 in the locked state by physically restricting the rotation of the caster 23. The switching unit 24 may also set the caster 23 in the locked state by driving the caster 23 or a member that abuts against the floor surface so that the caster 23 is positioned away from the floor surface. The switching unit 24 may employ a well-known configuration that can switch between the unlocked state and the locked state described above.

[0019] The tabletop 12 is rotatably supported by the legs 11. The tabletop 12 is rotatable between the use position shown in Fig. 1 and the flip-up position, which is the position of the tabletop 12 shown in Fig. 9C described below. The locked and unlocked states of the legs 11 transition in conjunction with the position of the tabletop 12. When the tabletop 12 is in the use position, the legs 11 are in the locked state. When the tabletop 12 is in the flip-up position, the legs 11 are in the unlocked state.

[0020] A rotation lever 31 and an operating unit 32 are disposed near the left and right ends on the rear side of the tabletop 12, respectively. Both of these can be operated by the user of the desk 1. The tabletop 12 in the use position is restricted from rotating. When the rotation lever 31 is operated, the restriction is released and the tabletop can be rotated to the flip-up position. The operating unit 32 is a lever for unlocking the legs 11 without rotating the tabletop 12. When the tabletop 12 is in the use position and the operating unit 32 is operated, the legs 11 are unlocked. This allows the desk 1 to be moved without rotating the tabletop 12.

[0021] 3 to 4, the configuration of the back side of the top plate 12 will be described. Although the left side of the top plate 12 is shown in Fig. 3 to 4, the right side of the top plate 12 is provided with a similar configuration that is reversed left and right. To realize the rotation of the tabletop 12, the desk 1 has a horizontal column 41, a horizontal column fixing portion 42, a tabletop fixing portion 43, an annular support portion 44, a fixing piece 45, a release shaft 46, a connecting rod 47, and a rotation control plate 48.

[0022] The horizontal pillar 41 has a cylindrical shape having a length in the left-right direction. The horizontal pillar 41 connects the pair of legs 11. The horizontal pillar fixing part 42 is fixed to the horizontal pillar 41 and also fixed to the vertical pillar 21. In other words, the horizontal pillar 41 is fixed to the pair of legs 11 via the horizontal pillar fixing part 42, and the horizontal pillar 41 is supported by the pair of legs 11.

[0023] The tabletop fixing part 43 is a part that is fixed to the tabletop 12 by screws or the like. The annular support part 44 is divided into a part that covers the lower part, front and rear of the horizontal pillar 41, and a part that covers the upper side of the horizontal pillar 41. Then, by combining these parts, they form an annular body that surrounds the entire circumferential direction of the horizontal pillar 41 at a predetermined position of the horizontal pillar 41 (see FIG. 7). The annular support part 44 is fixed to the tabletop fixing part 43. On the other hand, the horizontal pillar 41 is not fixed to the annular support part 44. With this configuration, the tabletop 12 is rotatable around the horizontal pillar 41 as an axis of rotation. In other words, the horizontal pillar 41 is the center of rotation of the tabletop 12.

[0024] Next, a mechanism for restricting the rotation of the top plate 12 will be described. The rotation lever 31, the fixed piece 45, and the release shaft 46 are parts fixed to the top plate 12. In other words, they are parts whose relative position with respect to the top plate 12 does not change even when the top plate 12 rotates. On the other hand, the rotation control plate 48 is a part fixed to the horizontal column 41. The rotation lever 31 is connected to the release shaft 46. When the rotation lever 31 is operated, the release shaft 46 rotates, and the fixed piece 45 fixed to the release shaft 46 is displaced. The rotation control plate 48 has a plurality of grooves formed therein with which the fixed piece 45 can engage.

[0025] When the tabletop 12 is in the use position, the upper end portion of the rotation control plate 48 abuts against the lower surface of the tabletop fixing portion 43, thereby restricting the tabletop 12 from rotating so that the rear end of the tabletop 12 lowers. When the rotation lever 31 is not operated, the fixed piece 45 fits into a predetermined groove of the rotation control plate 48, thereby restricting the tabletop 12 from rotating so that the rear end of the tabletop 12 rises. When the rotation lever 31 is operated and the fixed piece 45 comes out of the predetermined groove of the rotation control plate 48, the restriction on the rotation of the tabletop 12 is released, and the tabletop 12 can rotate toward the flip-up position. Similarly, when the tabletop 12 is in the flip-up position, when the rotation lever 31 is not operated, the fixed piece 45 fits into another groove of the rotation control plate 48, restricting the rotation of the tabletop 12. Then, by operating the rotation lever 31, the restriction on the rotation of the tabletop 12 is released. The connecting rod 47 connects a pair of release shafts 46 provided on the left and right sides of the desk 1. Therefore, when one release shaft 46 rotates, the other release shaft 46 also rotates, and the pair of left and right fixed pieces 45 are also displaced. Because of this configuration, by operating either the left or right rotation lever 31, the restriction on the rotation of the table top 12 by the fixed pieces 45 and the rotation control plates 48 on both the left and right sides of the desk 1 is released.

[0026] Next, a description will be given of the components that control the locking of the casters 23. The desk 1 has a first rod 49, a first displacement portion 50, a second displacement portion 51, a connecting portion 52, a second rod 53, a coil spring 54, and a case 55 as a configuration for realizing the locking control of the casters.

[0027] The first rod 49 is disposed inside the vertical column 21. When at least one of the first displacement portion 50 and the second displacement portion 51 is displaced, the first rod 49 operates in conjunction with the displacement. The switching portion 24 switches the leg portion 11 between an unlocked state and a locked state in conjunction with the operation of the first rod 49.

[0028] The first displacement part 50 is fixed to the tabletop 12, and is rotationally displaced in conjunction with the rotation of the tabletop 12. When the operating part 32 is operated, the second displacement part 51 is pressed via a second rod 53 that is linked to the operating part 32, and is rotationally displaced. The first displacement part 50 and the second displacement part 51 are arranged side by side in the length direction of the horizontal pillar 41, which is the axis member for the rotation of the tabletop 12, i.e., in the left-right direction. The first displacement part 50 is vessel-shaped. The second displacement part 51 is arranged inside the first displacement part 50.

[0029] 5A-5B, the first displacement portion 50 has a flat adjacent portion 71, a peripheral wall portion 72 extending from the adjacent portion 71 in a direction intersecting with the adjacent portion 71, and a long hole 73. The adjacent portion 71 extends in a direction perpendicular to the rotation axis of the tabletop 12 and is disposed adjacent to the second displacement portion 51. The peripheral wall portion 72 is disposed so as to surround the side surface of the second displacement portion 51. The long hole 73 is formed in the adjacent portion 71. The long hole 73 is a hole extending in a circumferential direction centered on the rotation axis of the tabletop 12, i.e., the virtual central axis of the horizontal column 41.

[0030] As shown in Figs. 6A-6C, the second displacement portion 51 is a substantially disk-shaped member. The second displacement portion 51 has a groove 81 formed on the side of the disk and extending in the circumferential direction, and a cylindrical portion 82 that is cylindrical and has a central axis that coincides with the axis of the disk and protrudes from the disk to one side. Of the two wall surfaces that constitute the groove 81 and extend in a direction perpendicular to the axis of the disk, a first long hole portion 83 is formed in the wall surface opposite to the side where the cylindrical portion 82 protrudes. Of the two wall surfaces, a second long hole portion 84 is formed in the wall surface on the side of the cylindrical portion 82. The first long hole portion 83 and the second long hole portion 84 extend in the circumferential direction centered on the virtual central axis of the horizontal column 41. The first long hole portion 83 and the second long hole portion 84 are provided at positions facing each other.

[0031] The depth of the groove 81 is not constant, but changes depending on the circumferential position. Inside the groove 81, a step is formed by the large change in depth. The position on the side where the step is formed, where the depth of the groove is smaller, is set as the abutment portion 85. Also, a hole 86 for inserting a screw is formed in a portion of the side surface of the disc where the groove 81 is not formed. The connecting portion 52 is inserted into the above-mentioned tubular portion 82. Then, the second displacement portion 51 and the connecting portion 52 are fixed by screwing with a screw inserted from the hole 86. The second displacement portion 51 is configured to be rotatably displaceable around the connecting portion 52.

[0032] The rotation axes of the first displacement part 50 and the second displacement part 51 are positioned coaxially with the rotation axis of the tabletop 12. Therefore, the first displacement part 50 and the second displacement part 51 are displaced along an imaginary plane perpendicular to the rotation axis of the tabletop 12. The rotation axis of the tabletop 12 here refers to the imaginary axis of the portion of the horizontal pillar 41 that supports the tabletop 12. The rotation axes of the first displacement part 50 and the second displacement part 51 refer to the imaginary axis that is the center of their rotation.

[0033] As shown in Fig. 7, the tip of the first rod 49 is inserted into the long hole 73. As a result, when the top plate 12 rotates and the first displacement portion 50 undergoes rotational displacement, the first rod 49, which is in contact with the lower end of the long hole 73, is pulled up. Note that Fig. 7 shows only some of the components to facilitate understanding of the first rod 49 and the first displacement portion 50.

[0034] On the other hand, as shown in FIG. 8, the tip of the first rod 49 that has passed through the long hole 73 is inserted into the first long hole portion 83 of the second displacement portion 51. That is, the first rod 49 passes through the long hole 73 and is connected to the second displacement portion 51. When the operating portion 32 is operated to rotate and displace the second displacement portion 51, the first rod 49 that abuts against the lower end of the first long hole portion 83 is pulled up. The second displacement portion 51 is arranged in line with the horizontal column 41 in the longitudinal direction of the horizontal column 41. Note that FIG. 8 illustrates only some of the components to facilitate understanding of the first rod 49 and the second displacement portion 51. The second long hole portion 84 defines a rotatable range of the second displacement portion 51 by inserting a protrusion (not shown) provided on the horizontal column fixing portion 42.

[0035] The explanation will be returned to Figs. 3 and 4. The connecting part 52 is arranged so as to pass through the inside of the horizontal column 41. The connecting part 52 is a rod-shaped member having a length in the left and right directions. As described above, both ends of the connecting part 52 are inserted into the respective tube parts 82 of the pair of second displacement parts 51. The connecting part 52 connects and links the pair of second displacement parts 51 arranged at an interval on the left and right sides of the desk 1. The connecting part 52 links the pair of second displacement parts 51 so that the pair of second displacement parts 51 are displaced in a synchronized manner. Therefore, if one of the second displacement parts 51 is displaced by operating either the left or right operating part 32, the other second displacement part 51 is also displaced in a synchronized manner. When the rotation axis of the pair of second displacement parts 51 (i.e., the central axis of the connecting part 52) ​​and the horizontal column 41 are projected onto a plane perpendicular to the rotation axis of the second displacement parts 51, the rotation axis of the second displacement parts 51 is located within the cross section of the horizontal column 41.

[0036] The second rod 53 slides along the back surface of the tabletop 12 as the operating unit 32 is operated, and presses the second displacement unit 51 to rotationally displace the second displacement unit 51. The second rod 53 is biased by a coil spring 54 in a direction in which the second rod 53 moves away from the second displacement unit 51. The case 55 supports the operating unit 32 so that it can be displaced, supports the second rod 53, and protects the coil spring 54.

[0037] The desk 1 also has covers such as a top board back cover 56, vertical column covers 57, and side covers 58 that protect the above-mentioned components and prevent the user's fingers, clothes, etc. from getting caught.

[0038] [1-2. Rod operating mechanism] The operation of the first rod 49 caused by rotating the top plate 12 will be described with reference to Figures 9A-9C. Figures 9A-9C are schematic diagrams showing only some of the components. The first rod 49 is biased downward (towards the floor side member 22) by a biasing member (not shown). Therefore, when no load for displacement is applied, 49 is at the lowest position within a predetermined movable range. At this time, the leg 11 is in a locked state.

[0039] FIG. 9A shows the state where the tabletop 12 is in the use position. The tip of the first rod 49 is located close to the lower end of the long hole 73 of the first displacement part 50. When the tabletop 12 is rotated, as shown in FIG. 9B, the first displacement part 50 fixed to the tabletop 12 rotates together with the tabletop 12. Since the long hole 73 is located away from the rotation center of the first displacement part 50, it moves with the rotation of the first displacement part 50. As a result, the tip of the first rod 49 abuts against the end of the long hole 73 and is pulled up. FIG. 9C shows the state where the tabletop 12 is in the flip-up position. At this time, the first rod 49 is pulled up to the highest position. Such displacement of the first rod 49 drives the switching part 24, and the leg part 11 transitions to the unlocked state.

[0040] Since the second displacement portion 51 is not fixed to the tabletop 12, it does not displace with the rotation of the tabletop 12. The tip of the first rod 49 is inserted into the first long hole portion 83 of the second displacement portion 51, but the tip moves inside the first long hole portion 83 with the rotation of the tabletop 12. Therefore, the first rod 49 does not displace the second displacement portion 51. Since the second rod 53 connected to the operating unit 32 is attached to the tabletop 12, it displaces with the rotation of the tabletop 12. However, the tip portion 53a of the second rod 53 does not abut against the abutment portion 85 of the groove 81 and only moves inside the groove 81, so it does not displace the second displacement portion 51.

[0041] The operation of the first rod 49 by operating the operating unit 32 will be described with reference to Figures 10A-10C. Figures 10-10C are schematic diagrams showing only some of the components. Figure 10A shows a state in which the operating unit 32 is not operated. The tip of the first rod 49 is located close to the lower end of the first long hole portion 83 of the second displacement portion 51. When the operating unit 32 is operated by a certain amount, as shown in Figure 10B, the second rod 53 slides and the tip portion 53a of the second rod 53 abuts against and presses the abutment portion 85, thereby rotating and displacing the second displacement portion 51. Since the first long hole portion 83 is located away from the rotation center of the second displacement portion 51, it moves with the rotation of the second displacement portion 51. As a result, the tip of the first rod 49 abuts against the end of the first long hole portion 83 and is pulled up. Figure 10C shows a state in which the operating unit 32 is operated to the end of the operable range. At this time, the first rod 49 is raised to the highest position. Such a displacement of the first rod 49 drives the switching portion 24, causing the leg portion 11 to transition to the unlocked state.

[0042] Although the tip of the first rod 49 passes through the long hole 73 of the first displacement portion 50, when the tip of the first rod 49 is displaced in conjunction with the operation portion 32, the tip moves inside the long hole 73. Therefore, the first displacement portion 50 does not hinder the displacement of the first rod 49. In other words, when the first rod 49 is displaced in conjunction with the displacement of the second displacement portion 51, the first rod 49 does not press the end of the long hole 73. On the other hand, as described above, when the first displacement portion 50 is displaced, the first rod 49 abuts against the end of the long hole 73, thereby displacing the first rod 49.

[0043] As described above, the first rod 49 is displaced upward by either the rotation of the tabletop 12 or the operation of the operating unit 32. This activates the switching unit 24, and the legs 11 are put into the unlocked state. That is, the switching unit 24 switches between the unlocked state and the locked state described above in conjunction with the displacement of the pair of first displacement units 50 or the displacement of the pair of second displacement units 51.

[0044] [1-3. Protection by the back cover of the tabletop] FIG. 11 is a view of the top plate 12 as seen from below, with the top plate 12 and some of the configuration omitted. The top plate rear cover 56 covers and protects many of the parts related to the rotation of the top plate 12 and the restriction of the rotation of the top plate 12, such as part of the horizontal pillar 41, the top plate fixing part 43, the annular support part 44, the fixing piece 45, and the release shaft 46. Furthermore, the relative positions of these parts with respect to the top plate 12 do not change when the top plate 12 rotates. Therefore, it is not necessary to form a large opening or the like that is necessary to enable the displacement. This can be suitably achieved by arranging the connecting part 52 inside the horizontal pillar 41. The reason for this will be explained below.

[0045] Assume a virtual configuration in which the connecting part 52 is disposed outside the horizontal column 41. The second displacement part 51 is fixed to the leg part 11, and as described above, is not fixed to the top plate 12, and when the top plate 12 rotates, its position relative to the top plate 12 changes. The connecting part 52 connected to the second displacement part 51 is also not fixed to the top plate 12, and when the top plate 12 rotates, its position relative to the top plate 12 changes. Therefore, when the top plate 12 is rotated, the top plate rear cover 56 rotates together with the top plate 12, but the connecting part 52 does not displace, so the relative positions of the top plate rear cover 56 and the connecting part 52 change. In that case, it becomes necessary to form a large opening or a long hole in the top plate rear cover 56 to accommodate the relative displacement of the connecting part 52. On the other hand, in the desk 1 of this embodiment, since the connecting part 52 is disposed inside the horizontal column 41, the above-mentioned opening or long hole is not necessary.

[0046] [1-4. Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) In the above-described desk 1, when the top plate 12 rotates to the flip-up position, the first displacement part 50 rotates and displaces, and the first rod 49 is pulled upward. In addition, in the desk 1, when the operation part 32 is operated, the second displacement part 51 rotates and displaces, and the first rod 49 is pulled upward. In other words, when the top plate 12 rotates and when the operation part 32 is operated, different parts move the first rod 49 upward. Therefore, compared to when a single part moves the first rod 49, the first displacement part 50 and the second displacement part 51 are used less frequently, and they are less likely to break. In addition, compared to when the functions of the first displacement part 50 and the second displacement part 51 are consolidated into one part, a complex and precise mechanism is not required, and robustness is increased. In addition, even if the control function of the switching part 24 using either the first displacement part 50 or the second displacement part 51 becomes unavailable due to damage or the like, there is a possibility that the other function remains available, and the risk of the lock control becoming completely unavailable can be reduced. For the above reasons, the desk 1 can stably exercise the locking control function of the casters 23.

[0047] (1b) In the above-described desk 1, the first displacement part 50 is directly fixed to the top board 12, so that the first displacement part 50 is reliably displaced along with the top board. Note that the first displacement part 50 may be indirectly fixed to the top board 12 via another part, so long as the first displacement part 50 is fixed to the top board 12 in such a way that it cannot be displaced relative to the top board 12. In this case as well, the above-described effects can be achieved.

[0048] (1c) In the above-described desk 1, the first displacement portion 50 and the second displacement portion 51 are arranged side by side in the longitudinal direction of the rotation axis of the table top 12. Therefore, the above-described first displacement portion 50 and second displacement portion 51 can be arranged in a compact and compact state.

[0049] (1d) In the above-described desk 1, the rotation axis of the first displacement part 50 and the second displacement part 51 is located coaxially with the rotation axis of the top plate 12. This allows the mechanism of the desk 1 to be simplified. For example, regardless of the rotation position of the top plate 12, the axial positions of the first displacement part 50 and the second displacement part 51 do not change, so there is no need to design a structure that takes into account changes in the positions of other parts caused by deviations in their axial positions. In addition, there is no need to make the cover larger to cover parts whose positions change.

[0050] (1e) In the above-described desk 1, the first displacement part 50 is container-shaped, and the second displacement part 51 is disposed inside the first displacement part 50. Therefore, the first displacement part 50 and the second displacement part 51 can be disposed in a compact, integrated state.

[0051] (1f) In the desk 1 described above, the second displacement portion 51 is adjacent to the adjacent portion 71 of the first displacement portion 50. A long hole 73 is formed in the adjacent portion 71, and the first rod 49 passes through the long hole 73 to connect to the second displacement portion 51. When the second displacement portion 51 is displaced to displace the first rod 49, the first rod 49 does not press the end of the long hole 73, and therefore the first displacement portion 50 is not displaced.

[0052] Therefore, in the desk 1 described above, even though the first displacement portion 50 and the second displacement portion 51 are adjacent to each other, when the second displacement portion 51 is displaced by operating the operating portion 32, the first rod 49 can be displaced while preventing the top plate 12 from being displaced.

[0053] [1-5. Correspondence] In the above embodiment, the pair of legs 11 correspond to the legs. The first rod 49 corresponds to the connecting rod. The first displacement portion 50 corresponds to the first part, and the second displacement portion 51 corresponds to the second part.

[0054] [2. Other embodiments] Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is in no way limited to the above-described embodiments, and can take various forms as long as it falls within the technical scope of the present disclosure.

[0055] (2a) The desk 1 shown in the above embodiment may be configured as follows. For example, the first displacement portion 50 may be fixed so that its position relative to the top plate 12 changes. Also, the horizontal pillar 41 is configured to be cylindrical in the entire left-right direction. However, at least a part of the horizontal pillar 41 may be formed as a cylindrical portion, and the top plate 12 may be configured to rotate around the cylindrical portion. Also, the mechanism for rotating the top plate 12 is not particularly limited. For example, the pair of legs 11 may be connected by a frame extending left and right, and the top plate 12 may be supported on a shaft so as to be rotatable with respect to each of the pair of legs 11.

[0056] (2b) The form of the first displacement part 50 and the second displacement part 51 is not limited to the configuration of the above embodiment. For example, contrary to the embodiment, the second displacement part 51 may be configured to be vessel-shaped and the first displacement part 50 may be disposed inside the second displacement part 51. Furthermore, the first displacement part 50 does not have to be formed in a vessel shape, and the second displacement part 51 does not have to be disposed inside the first displacement part 50. That is, the first displacement part 50 and the second displacement part 51 may adopt various forms within a range in which they each perform the function of displacing the first rod 49 in conjunction with the top plate 12 and the operation part 32. Furthermore, the first displacement part 50 and the second displacement part 51 may be disposed at positions spaced apart from each other in a direction intersecting the length direction of the rotation axis of the top plate 12. Furthermore, either one or both of the first displacement part 50 and the second displacement part 51 may be disposed at a position where the rotation axis is shifted from the rotation axis of the top plate 12.

[0057] In the above embodiment, the first displacement portion 50 and the second displacement portion 51 are both configured to undergo rotational displacement. However, either one or both of the first displacement portion 50 and the second displacement portion 51 may be configured to undergo displacement other than rotation, such as linear movement within a predetermined range.

[0058] In the above embodiment, the configuration in which the rod 49 is connected to both the first displacement portion 50 and the second displacement portion 51 by penetrating the long hole 73 has been exemplified, but the rod 49 may be connected to the first displacement portion 50 and the second displacement portion 51 in a manner other than that. For example, the first rod 49 may have two engagement pieces that engage with the first displacement portion 50 and the second displacement portion 51 separately.

[0059] Further, for example, the first displacement unit 50 and the second displacement unit 51 may be configured to displace different connecting rods up and down, respectively. In this case, the switching unit 24 may be configured to switch the leg between the unlocked state and the locked state when one of the two connecting rods is displaced.

[0060] (2c) Multiple functions possessed by one component in the above embodiments may be realized by multiple components, or one function possessed by one component may be realized by multiple components. Also, multiple functions possessed by multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. [Explanation of symbols]

[0061] 1...desk, 11...legs, 12...tabletop, 21...vertical pillar, 22...floor side member, 23...caster, 24...switching portion, 31...rotation lever, 32...operation portion, 41...horizontal pillar, 42...horizontal pillar fixing portion, 43...tabletop fixing portion, 44...annular support portion, 45...fixing piece, 46...release shaft, 47...connecting rod, 48...rotation control plate, 49...first rod, 50...first displacement portion, 51...second displacement portion, 52...connecting portion, 53...second rod, 53a...tip portion, 54...coil spring, 55...case, 56...tabletop back cover, 57...vertical pillar cover, 58...side cover, 71...adjacent portion, 72...peripheral wall portion, 73...long hole, 81...groove, 82...tubular portion, 83...first long hole portion, 84...second long hole portion, 85...contact portion, 86...hole.

Claims

1. A desk having legs that can be switched between an unlocked state in which the desk is movable on casters and a locked state in which the desk is unable to move, and a tabletop that is supported by the legs and rotatably supported between a use position and a flip-up position, A first displacement portion that is displaced in conjunction with the rotation of the top plate; a second displacement unit that is displaced when an operation unit operable by a user of the desk is operated; a connecting rod that is disposed inside a cylindrical vertical column having a length in the vertical direction of the leg portion and operates in conjunction with the displacement of at least one of the first displacement portion and the second displacement portion; a switching unit that switches between the unlocked state and the locked state of the leg unit in response to an operation of the connecting rod; Equipped with A desk, wherein the first displacement portion is fixed to the top plate so as to be unable to displace relative to the top plate.

2. 2. The desk according to claim 1, A desk, wherein the first displacement portion and the second displacement portion are arranged side by side in a longitudinal direction of a rotation axis of the top plate.

3. A desk according to claim 1 or 2, A horizontal column is supported by the legs and serves as a rotation center of the tabletop. The first displacement portion and the second displacement portion are configured to be rotationally displaced, A desk, wherein a rotation axis of the first displacement portion and the second displacement portion is positioned coaxially with a rotation axis of the top plate.

4. A desk according to any one of claims 1 to 3, a first part which is either the first displacement part or the second displacement part has a vessel shape; A desk, wherein a second part, which is different from the first part, of the first displacement part and the second displacement part is arranged inside the first part.

5. A desk according to any one of claims 1 to 3, The first displacement portion has a plate-like adjacent portion disposed adjacent to the second displacement portion. A long hole is formed in the adjacent portion, and the connecting rod passes through the long hole and is connected to the second displacement portion, The long hole is configured so that when the second displacement portion displaces the connecting rod, the connecting rod does not press the end of the long hole, and when the first displacement portion displaces, the connecting rod abuts against the end of the long hole, thereby displacing the connecting rod.

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