Furniture stand

Abstract

To provide a leg capable of changing a longitudinal size, dispensing with preparation of a tool, while suppressing the number of components, and suppressing occurrence of a trouble such as loss of a component such as a bolt constituting a fixing mechanism.SOLUTION: A leg 4 has a constitution including an outer cylinder 41, an inner cylinder 42 fitted into the outer cylinder 41 relatively movably, a positioning member 43 arranged in the inner cylinder 42 for positioning moderately the outer cylinder 41 and the inner cylinder 42, and a stationary member 44 for keeping or releasing a positioning state by restricting or releasing the movement of the positioning member 43.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a leg post whose longitudinal dimension is adjustable and which is suitable for use in furniture such as desks and chairs in schools and the like. [Background technology]

[0002] BACKGROUND ART Conventionally, various types of legs with adjustable longitudinal dimensions have been devised for furniture such as desks and chairs used in schools and the like, so that the height positions of the tabletops, seats, etc. can be changed.

[0003] An example of such a fixture leg is one that includes an outer tube, an inner tube that is fitted into the outer tube so that it can move relative to the outer tube, a positioning mechanism for positioning the outer tube and the inner tube, and a fixing mechanism for fixing the outer tube and the inner tube (see, for example, Patent Document 1).

[0004] In the device described in Patent Document 1, the positioning mechanism and the fixing mechanism are provided separately, which increases the number of parts and poses the problem of the risk of losing parts such as bolts that make up the fixing mechanism. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-242912 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made with the above-mentioned points in mind, and aims to realize a pedestal whose longitudinal dimension can be changed while reducing the number of parts, eliminating the need to prepare additional tools such as screwdrivers or wrenches when performing positioning and fixing operations, and reducing the occurrence of problems such as losing parts such as bolts that make up the fixing mechanism. [Means for solving the problem]

[0007] The invention described in claim 1 comprises an outer cylinder, an inner cylinder fitted into the outer cylinder so as to be relatively movable, a positioning member disposed in the inner cylinder for modestly positioning the outer cylinder and the inner cylinder, and a fixing member for restricting or releasing the movement of the positioning member to maintain or release the positioned state. a base for a fixture, wherein one of the outer tube and the inner tube is provided with a plurality of insertion holes at regular intervals in the longitudinal direction, and the other is provided with a fixing hole that selectively matches one of the insertion holes, the positioning member has a protrusion that is biased by an elastic member to engage with the insertion hole and the fixing hole, the positioning member has a temporary release function that can forcibly and temporarily release an engaged state, and this temporary release function is configured to function by pressing the fixing member, the positioning member comprises a latch plate having the protrusion, a back plate, and an elastic member arranged between the latch plate and the back plate, the fixing member has a female screw provided on the latch plate and a male screw member that screws into the female screw and passes through the outer tube, and the head of the male screw member serves as a knob that receives an operating force for screwing the male screw member into the female screw or releasing the screwed state, and that receives a pressing operating force for forcibly and temporarily releasing the engaged state of the positioning member. is.

[0008] The invention described in claim 2 is A fixture pedestal comprising an outer tube, an inner tube fitted into the outer tube so as to be relatively movable, a positioning member disposed within the inner tube and modestly positioning the outer tube and the inner tube, and a fixing member restricting or releasing the movement of the positioning member to maintain or release the positioned state, wherein one of the outer tube and the inner tube is provided with a plurality of insertion holes at regular intervals in the longitudinal direction, and the other is provided with a fixing hole selectively matching one of the insertion holes, the positioning member has a protrusion biased by an elastic member that engages with the insertion hole and the fixing hole, the insertion hole is provided with a rectangular positioning portion that can engage with the protrusion, the protrusion is rectangular, and the fixing hole is rectangular. is. [Effects of the Invention]

[0011] According to the present invention, it is possible to realize a pedestal whose longitudinal dimension is changeable while reducing the number of parts and preventing the occurrence of problems such as loss of parts such as bolts that constitute the fixing mechanism. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a desk as a piece of furniture according to an embodiment of the present invention; [Figure 2] FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. [Figure 5] FIG. 3 is a cross-sectional view taken along line BB in FIG. 2. [Figure 6] FIG. 4 is a cross-sectional view taken along line CC in FIG. 3. [Figure 7] FIG. [Figure 8] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. [Figure 9] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. [Figure 10] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. [Figure 11] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. [Figure 12]FIG. 10 is an exploded perspective view showing a pedestal according to another embodiment of the present invention. [Figure 13] FIG. 10 is a front view showing a main part of a pedestal according to another embodiment of the present invention. [Figure 14] FIG. 4 is a side view showing a main part of the pedestal according to the embodiment. [Figure 15] FIG. 14 is a cross-sectional view taken along line XX in FIG. [Figure 16] 15 is a cross-sectional view taken along line YY in FIG. 14. [Figure 17] FIG. [Figure 18] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. [Figure 19] 5A to 5C are explanatory diagrams illustrating the operation of the landing gear according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of the present invention will be described with reference to FIGS.

[0014] As shown in FIGS. 1 to 4, a desk D, which is a piece of furniture according to this embodiment, includes a top board 1 and legs 2 that support the top board 1, and has a bilaterally symmetrical shape.

[0015] As shown in Figures 1 to 4, the leg body 2 has a leg base 3, a pair of left and right leg pillars 4 standing up from the leg base 3, and a tabletop support 5 provided above the leg pillars 4 to support the tabletop 1 from below.

[0016] The leg base 3 is made of components such as metal pipes, and as shown in Figures 1 to 4, it integrally comprises a rear frame 31 extending to the left and right and side frames 32 extending forward from both ends of the rear frame 31.

[0017] 1, 3 and 4, the pedestal 4 stands upright from the middle of the side frame 32 of the leg base 3, and its upper end is connected to the tabletop support 5. As shown in FIGS. 4 to 7, the pedestal 4 is equipped with an outer tube 41, an inner tube 42 fitted into the outer tube 41 so as to be relatively movable, a positioning member 43 disposed within the inner tube 42 and gently positioning the outer tube 41 and the inner tube 42, and a fixing member 44 which limits or releases the movement of the positioning member 43 to maintain or release the positioned state.

[0018] More specifically, as shown in FIGS. 1, 3, and 4, the outer cylinder 41 has a lower end fixed to the side frame 32 of the leg base 3 and is formed using a metal pipe member having a generally rectangular cross section. As shown in FIGS. 4 to 7, the outer cylinder 41 has a front wall 411, an inner wall 412, an outer wall 413, and a back wall 414. Two fixing holes 41a are formed in the inner wall 412 of the outer cylinder 41, spaced apart in the vertical direction, and a fixing member insertion hole 41b is formed between the fixing holes 41a, through which a fixing member 44 is inserted. As described above, the inner cylinder 42 is fitted into the outer cylinder 41 so as to be movable relative to the outer cylinder 41.

[0019] The inner tube 42 is formed using a metal pipe member having a generally rectangular cross section, and as shown in FIGS. 4 to 7, has a front wall 421, an inner wall 422, an outer wall 423, and a rear wall 424. Furthermore, as shown in FIGS. 1, 3, 4, and 7, the inner wall 422 of the inner tube 42 is provided with a plurality of insertion holes 42a to 42i (first to ninth insertion holes 42a to 42i, in this embodiment, from bottom to top) at regular intervals in the longitudinal direction, and a slit 42s extending in the longitudinal direction and connecting the insertion holes 42a to 42i is provided, through which a fixing member 44 is inserted. As shown in FIGS. 4 to 11, a positioning member 43 is disposed inside the inner tube 42, and when any of the insertion holes 42a to 42i is positioned to align with the fixing hole 41a of the outer tube 41, the positioning member 43 determines the relative position of the inner tube 42 with the outer tube 41. That is, in this embodiment, seven different positions can be taken, from a state in which the first and third insertion holes 42a, 42c are aligned with the fixing hole 41a of the outer tube 41 to a state in which the seventh and ninth insertion holes 42g, 42i are aligned with the fixing hole 41a of the outer tube 41, and the height position of the tabletop 1 can be adjusted in seven positions.

[0020] The positioning member 43 has a protrusion 436 that is biased by a compression coil spring 433, which is an elastic member, and engages with the insertion holes 42a to 42i and the fixing hole 41a. More specifically, as shown in FIGS. 4 to 11 , the positioning member 43 includes a latch plate 431 that is U-shaped in plan view and has the protrusion 436, a back plate 432 that is U-shaped in plan view and opens toward the latch plate 431, and a compression coil spring 433 disposed between the latch plate 431 and the back plate 432. The latch plate 431 includes a face plate portion 434 that can be attached to the inner wall 422 of the inner tube 42 and has two cylindrical protrusions 436 at upper and lower locations, and side plate portions 435 that extend laterally from both the front and rear ends of the face plate portion 434. A retainer 439 for holding the free end of the compression coil spring 43 is provided on the surface of the face plate portion 434 opposite the surface on which the protrusion 436 is provided. A guide recess 43a is provided in the center of the side plate portion 435 in the height direction to guide the direction of relative movement with the back plate 432. The back plate 432 includes a face plate portion 437 that abuts against the outer wall 423 of the inner cylinder 42, and side plate portions 438 that extend laterally from both the front and rear ends of the face plate portion 437. A retainer 430 is provided on the surface of the face plate portion 437 facing the latch plate 431 to hold the fixed end of the compression coil spring 43. A guide protrusion 43b is provided in the center of the side plate portion 438 in the height direction to engage with the guide recess 43a of the latch plate 431 movably in the left-right direction and to guide the direction of relative movement with the latch plate 431. The positioning member 43 also has a temporary release function that can forcibly and temporarily release the engaged state. Specifically, when an operating force acting in a direction from the fixed member 44 toward the back plate 432 is transmitted to the latch plate 431, the latch plate 431 moves toward the back plate 432 against the biasing force of the compression coil spring 43, causing the protrusions 436 to come out of the insertion holes 42a to 42i and the fixed hole 41a, thereby permitting relative movement between the outer tube 41 and the inner tube 42. The fixed member 44 is formed by utilizing a female screw 442 formed between both protrusions 436 on the latch plate 431 of this positioning member 43.

[0021] 4 to 11, the fixing member 44 includes a female screw 442 provided on the latch plate 431, and a male screw member 441 that screws into the female screw 442 and passes through the fixing member insertion hole 41s of the outer cylinder 41. The head of the male screw member 441 serves as a knob 443 that receives an operating force for screwing the male screw member 441 into the female screw 442 or releasing the screwed state. In addition, the fixing member 44, more specifically the knob 443 of the fixing member 44, receives a pressing operating force for forcibly and temporarily releasing the engagement between the protrusion 436 and the insertion holes 42a to 42i and the fixing hole 41a.

[0022] A top plate support 5 is connected to the upper end of the leg pillar 4.

[0023] The tabletop support 5 is attached to the underside of the tabletop 1 and supports the tabletop 1 from below. More specifically, the tabletop support 5 is made of a metal pipe member and integrally comprises a rear tabletop support portion 51 that extends left and right and supports the vicinity of the opposite end of the tabletop 1 from below, and side tabletop support portions 52 that extend forward from both left and right ends of the rear tabletop support portion 51 and support both side ends of the tabletop 1 from below. The middle portions of the side tabletop support portions 52 are connected to the upper ends of the pedestals 4.

[0024] Next, the operation of each part when the leg column 4 is extended or retracted to change the height position of the tabletop 1 of this desk D will be described.

[0025] In the state shown in FIG. 6, the first and third insertion holes 42a, 42c are aligned with the fixing hole 41a of the outer tube 41, the protrusion 436 is engaged with these insertion holes 42a, 42c and the fixing hole 41a, and the male thread member 441 of the fixing member 44 is fastened to the female thread 442, preventing relative movement between the outer tube 41 and the inner tube 42. From this state, the knob 443 of the fixing member 44 is rotated to release the fastened state and move the knob 443 away from the outer tube 41, as shown in FIG. 8. Next, as shown in FIG. 9, the knob 443 is pressed toward the outer tube 41 against the biasing force of the compression coil spring 433. At this time, the latch plate 431, on which the protrusion 436 of the positioning member 43 is provided, is pushed toward the back plate 432, and the protrusion 436 is removed from the insertion holes 42a, 42c and the fixing hole 41a. Then, the tabletop 1 is raised or lowered to the desired height by moving the inner tube 42 relative to the outer tube 41. Figure 10 shows the state of the tabletop 1 during its movement. When the tabletop 1 reaches the next height, as shown in Figure 11, that is, when the second and fourth insertion holes 42a and 42c align with the fixing hole 41a of the outer tube 41, the biasing force of the compression coil spring 433 causes the protrusion 436 to pass through the insertion holes 42b and 42d and the fixing hole 41a and engage with them, thereby positioning the outer tube 41 and the inner tube 42 relative to each other. By repeating this process, the tabletop 1 can be set to the desired height. When the tabletop 1 reaches the desired height, the male screw 441 of the fixing member 44 is fastened to the female screw portion 442, bringing the knob 443 into close contact with the outer tube 41, again prohibiting relative movement between the inner tube 42 and the outer tube 41. In reality, the operation of extending and retracting the leg column 4 is often performed with the desk D turned upside down, but in Figures 8 to 11, the upside down of the leg column 4 is shown in its original state to make it easier to understand the correspondence with the state in Figure 6.

[0026] Here, FIG. 1 is an overall perspective view of the desk D according to this embodiment. FIG. 2 is a front view of the same. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is an exploded perspective view of the desk D according to this embodiment. FIG. 5 is a cross-sectional view taken along line BB in FIG. 2. FIG. 6 is a cross-sectional view taken along line CC in FIG. 3. FIG. 7 is an exploded perspective view of the leg column 4 according to this embodiment. FIGS. 8 to 11 are explanatory views showing the operation of the positioning member 43 and the fixing member 44 according to this embodiment. In particular, FIG. 8 shows a state in which the knob 443 of the fixing member 44 is loosened, FIG. 9 shows a state in which the fixing member 44 and the latch plate 431 are pressed, FIG. 10 shows a state in which the inner tube 42 has been moved relative to the outer tube 41 from the state shown in FIG. 9, and FIG. 11 shows a state in which the inner tube 42 has been further moved relative to the outer tube 41 from the state shown in FIG. 9, thereby engaging the protrusion 436 with the insertion holes 42b, 42d, and the fixing hole 41a. 6 and 8 to 11, patterns are provided on the slits 42s of the inner cylinder 42 at portions that do not overlap with the insertion holes 42a to 42i.

[0027] As described above, this embodiment allows the longitudinal dimension of the pedestal 4 to be adjusted to change the height of the tabletop 1, while also achieving the following advantages. That is, according to this embodiment, the positioning member 43 is disposed inside the inner tube 42, simplifying the internal structure of the pedestal 4, increasing the degree of freedom in exterior design, and reducing the risk of external damage. The movement of the components of the positioning member 43 is restricted or released by the fixing member 44 to maintain or release the positioned state, thereby reducing the number of parts compared to when a separate, independent fixing mechanism is provided. Furthermore, because the fixing member 44 restricts or releases the movement of the components of the positioning member 43, the risk of losing components of the fixing mechanism is reduced compared to a configuration in which the movement of the components of the positioning member 43 is restricted or released by attaching or detaching components of the fixing mechanism.

[0028] Furthermore, the positioning member 43 has a protrusion 436 that is biased by the compression coil spring 433 and engages with the insertion holes 42a to 42i of the inner tube 42 and the fixing hole 41a of the outer tube 41, so that the positioned state can be maintained or released by protruding or retracting this protrusion 436. However, since the positioning member 43 is biased by the compression coil spring 433, the protrusion 436 remains engaged with the insertion holes 42a to 42i and the fixing hole 41a described above unless the fixing member 44 is intentionally pressed, so that the positioning member 43 and the inner tube 42 will not move unexpectedly, ensuring safety.

[0029] Furthermore, the positioning member 43 has a temporary release function that can temporarily release the engaged state forcibly, and by utilizing this temporary release function, it is possible to extend or retract the leg column 4, i.e., change the height position of the tabletop 1.

[0030] Furthermore, when the outer tube 41 and the inner tube 42 are moved relative to each other, if the pressure on the fixing member 44 is released from the state shown in Figure 10, the position of the protrusion 436 will match the insertion holes 42a to 42i and the fixing hole 41a due to the biasing force of the compression coil spring 433, and the protrusion 436 will then be inserted into the insertion holes 42a to 42i and the fixing hole 41a, thereby allowing appropriate positioning to be performed without complicated positioning operations.

[0031] Furthermore, by pressing the fixing member 44, the temporary release function is exerted, so that the height position of the tabletop 1 can be changed by a simple operation.

[0032] The present invention is not limited to the above-described embodiment.

[0033] For example, in the above-described embodiment, the present invention is applied to the base of a desk, but the present invention may also be applied to the base of chairs and other furniture other than desks in general.

[0034] In the above-described embodiment, the protrusions of the positioning member are cylindrical, and the insertion holes and fixing holes are circular. However, the shapes of the protrusions, insertion holes, and fixing holes may be arbitrarily set as long as the protrusions can engage with the insertion holes and fixing holes. For example, the protrusions may be prismatic and the insertion holes and fixing holes may be polygonal, or the protrusions may be elliptical and the insertion holes and fixing holes may be elliptical. Furthermore, as shown in FIG. 12, the protrusion 436 of the positioning member 43 may be generally cylindrical with positioning protrusions 436a protruding on both sides, and the insertion holes 42a-42i and fixing hole 41a may be provided with positioning recesses 42a1-42i1 and 41a1 that correspond to the positioning protrusions 436a of the protrusion 436 and communicate with each other. The pedestal shown in FIG. 12 has the same configuration as the pedestal 4 of the embodiment described above with reference to FIGS. 1 to 11, except that it has the positioning protrusion 436a and positioning recesses 42a1 to 42i1, 41a1 described above. In FIG. 12, parts corresponding to those in the embodiment described above are given the same reference numerals, and their description will be omitted.

[0035] In addition, other embodiments of the present invention are as follows, with reference to FIGS.

[0036] The pedestal A4 according to this embodiment supports a tabletop (not shown) from below and is provided upright from a leg base (not shown). As shown in Figures 13 to 19, it comprises an outer tube 41, an inner tube 42 fitted into the outer tube 41 so as to be movable relative to the outer tube 41, a positioning member 43 disposed within the inner tube 42 and gently positioning the outer tube 41 and the inner tube 42, and a fixing member 44 that limits or releases the movement of the positioning member 43 to maintain or release the positioned state. The pedestal A4 has the same configuration as the leg 4 of the above-described embodiment, except for the points described below. Parts corresponding to those in the above-described embodiment are designated by the same reference numerals, and their description will be omitted.

[0037] 15 to 17, outer cylinder 41 is formed using a metal pipe member having an oval cross section, and front wall 411 and rear wall 414 are semi-cylindrical. Two elongated rectangular fixing holes 41a extending in the depth direction are provided in inner wall 412 of outer cylinder 41, spaced apart in the vertical direction, and circular fixing member insertion hole 41b is provided between fixing holes 41a for inserting fixing member 44.

[0038] As shown in Figures 15 to 17, the inner tube 42 is formed using a metal pipe member having an oval cross section, and the front wall 421 and the rear wall 424 are semi-cylindrical. Furthermore, as shown in Figures 16 and 17, the inner wall 422 of the inner tube 42 is provided with a plurality of insertion holes 42a to 42i (first to ninth insertion holes 42a to 42i, in this embodiment, from bottom to top) at regular intervals in the longitudinal direction, and a slit 42s extending in the longitudinal direction and connecting the insertion holes 42a to 42i is provided, through which the fixing member 44 is inserted. Each of the first to ninth insertion holes 42a to 42i is provided with rectangular positioning portions 42a1 to 42i1 that can engage with a protrusion 436 (described later) of the positioning member 43, and circular fixing portions 42a2 to 42i2 through which the fixing member 44 is inserted.

[0039] 15 to 17, the positioning member 43 has a protrusion 436 that is biased by a compression coil spring 433, which is an elastic member, and engages with the insertion holes 42a to 42i and the fixing hole 41a. More specifically, the positioning member 43 includes a latch plate 431 that is U-shaped in plan view and has the protrusion 436, a back plate 432 that is U-shaped in plan view and opens toward the latch plate 431, and a compression coil spring 433 that is disposed between the latch plate 431 and the back plate 432. The latch plate 431 includes a face plate portion 434 that can be brought into contact with the inner wall 422 of the inner cylinder 42, and side plate portions 435 that extend laterally from both the front and rear ends of the face plate portion 434. Furthermore, rectangular protrusions 436 that protrude toward the outer tube 41 and inner tube 42 are formed on both upper and lower ends of the face plate portion 434 by, for example, sheet metal processing, and these protrusions 436 are adapted to engage with the fixing hole 41a of the outer tube and the positioning portions 42a1 to 42i1 of the insertion holes 42a to 42i of the inner tube 42. The back plate 432 includes a face plate portion 437 that abuts against the outer wall 423 of the inner tube 42, and side plate portions 438 that extend laterally from both front and rear ends of the face plate portion 437. In this embodiment, the guide protrusions 43b provided in the center of the side plate portion 438 in the height direction are plate-shaped and protrude on both sides (front and rear) in the depth direction.

[0040] 15 to 18, the fixing member 44 includes a female screw 442 provided on the latch plate 431 and a male screw member 441 that screws into the female screw 442 and passes through the fixing member insertion hole 41s of the outer cylinder 41. The female screw 442 of the fixing member 44 is provided at the center of a truncated cone-shaped protrusion. The shape of the protrusion on which the female screw 442 of the fixing member 44 is provided may be set arbitrarily as long as it can be engaged with the fixing member insertion hole 41b of the outer cylinder 41.

[0041] In this embodiment, as shown in FIGS. 15 to 19, a forgetfulness prevention device 45 is provided near the fixing member insertion hole 41b of the outer tube 41. In this embodiment, the forgetfulness prevention device 45 is a ring-shaped member surrounding the fixing member insertion hole 41b, and includes a ring-shaped preventer body 451 and a locking protrusion 452 protruding from the preventer body 451 toward the outer tube 41. The preventer body 451 is attached to the outer tube by engaging the locking protrusion 452 with a preventer locking hole 41h provided in the outer tube. The outer peripheral surface 451a of the preventer body 451 is colored a different color from the knob 443 of the fixing member 44. In FIGS. 17 to 19, a pattern is applied to the outer peripheral surface 451a of the preventer body 451 to make it easier to see that the surface 451a is colored.

[0042] In this embodiment, when the male screw member 441 of the fixing member 44 is fastened to the female screw member 442, the male screw member 441 is partially threaded onto the female screw member 442 from the state shown in Fig. 18 to obtain the state shown in Fig. 19, and then the male screw member 441 is further tightened to obtain the state shown in Fig. 13. Here, when the male screw member 441 is not completely fastened to the female screw member 442, part or all of the outer circumferential surface 451a of the preventer main body 451 is visible from the outside. This, together with the fact that the outer circumferential surface 451a of the preventer main body 451 is colored a different color from the knob 443, makes it possible for the user to easily recognize when the male screw member 441 is not completely fastened to the female screw member 442.

[0043] Furthermore, when changing the relative positions of the outer tube 41 and the inner tube 42, the male screw member 441 is loosened so that the state changes from that shown in Fig. 13 to that shown in Fig. 19, and after performing the same operations as in the above-described embodiment with reference to Figs. 1 to 11, the male screw member 441 is tightened again to the state shown in Fig. 13. In this case as well, when the male screw member 441 is not completely fastened to the female screw 442, part or all of the outer peripheral surface 451a of the protector main body 451 is visible from the outside, so that the user can easily recognize this.

[0044] Here, Fig. 13 is a front view showing the pedestal A4 of this embodiment. Fig. 14 is a side view of the pedestal A4 on the side where the knob 443 is provided. Figs. 13 and 14 show enlarged views of the main parts of the pedestal A4. Fig. 15 is a cross-sectional view taken along line XX in Fig. 13. Fig. 16 is a cross-sectional view taken along line YY in Fig. 14. Fig. 17 is an exploded perspective view of the pedestal A4. Fig. 18 is a view showing a state in which the male screw member 441 (and knob 443) of the fixing member 44 has been completely removed, and Fig. 19 is a view showing a state in which the male screw member 441 (and knob 443) of the fixing member 44 has only partly been screwed into the female screw member 442. Although Figure 16 shows only the first to sixth insertion holes 42a to 42f and Figure 17 shows only the first to third insertion holes 42a to 42c, in reality, the inner tube 42 is provided with first to ninth insertion holes 42a to 42i.

[0045] The above-described embodiment can achieve the same effects as those of the embodiment described above with reference to FIGS. 1 to 11. Specifically, because the positioning member 43 is disposed inside the inner tube 42, the internal structure of the pedestal 4 is simplified, allowing for greater freedom in exterior design and reducing the risk of external damage. The movement of the components of the positioning member 43 is restricted or released by the fixing member 44 to maintain or release the positioned state, thereby reducing the number of parts compared to when a separate, independent fixing mechanism is provided. Additionally, because the movement of the components of the positioning member 43 is restricted or released by the fixing member 44, the risk of losing a component of the fixing mechanism is reduced compared to a configuration in which the movement of the components of the positioning member 43 is restricted or released by attaching or detaching a component of the fixing mechanism.

[0046] Furthermore, in the above-described embodiment, the state in which the positioning state is maintained by the fixing member is released, and the engagement between the protrusion and the insertion hole and fixing hole is released by pressing the fixing member, thereby enabling relative movement between the inner tube and the outer tube; however, for example, it is also possible to adopt an embodiment in which both the upper and lower end edges of the protrusion are formed tapered, and the protrusion retracts when an operation is performed to move the inner tube and outer tube relative to each other after the state in which the positioning state is maintained by the fixing member is released.

[0047] In addition, in the above-described embodiment, the inner cylinder is provided with a plurality of insertion holes at regular intervals in the longitudinal direction, and the outer cylinder is provided with fixing holes that selectively match any of the plurality of insertion holes, but conversely, the outer cylinder may be provided with a plurality of insertion holes at regular intervals, and fixing holes may be provided in the inner cylinder. Furthermore, the number of insertion holes and fixing holes may be set arbitrarily.

[0048] In addition, various modifications may be made without departing from the spirit of the present invention. [Explanation of symbols]

[0049] D…Furnishings (desk) 4...Pole 41...Outer cylinder 41a…Fixing hole 42…Inner cylinder 42a to 42i...(1st to 9th) insertion holes 43... Positioning member 433...Elastic member (compression coil spring) 436...Protrusion 44...Fixing member

Claims

1. A fixture pedestal comprising an outer tube, an inner tube fitted into the outer tube so as to be relatively movable, a positioning member disposed within the inner tube for modestly positioning the outer tube and the inner tube, and a fixing member for restricting or releasing the movement of the positioning member to maintain or release the positioned state, One of the outer tube and the inner tube is provided with a plurality of insertion holes at regular intervals in the longitudinal direction, and the other is provided with a fixing hole that selectively matches any one of the insertion holes, the positioning member has a protrusion that is biased by an elastic member to engage with the insertion hole and the fixing hole, the positioning member has a temporary release function that can forcibly release the engaged state temporarily, and this temporary release function is configured to function by pressing the fixing member, the positioning member includes a latch plate having the protrusion, a back plate, and an elastic member disposed between the latch plate and the back plate, The fixing member includes a female screw provided on the latch plate and a male screw member that screws into the female screw and passes through the outer cylinder, A fixture pedestal in which the head of the male screw member serves as a knob that receives an operating force for screwing the male screw member into the female screw or releasing the screwed state, and also receives a pressing operating force for forcibly and temporarily releasing the engaged state of the positioning member.

2. A fixture base comprising an outer tube, an inner tube fitted into the outer tube so as to be movable relative to the outer tube, a positioning member disposed within the inner tube for gently positioning the outer tube and the inner tube, and a fixing member for restricting or releasing the movement of the positioning member to maintain or release the positioning state, One of the outer tube and the inner tube is provided with a plurality of insertion holes at regular intervals in the longitudinal direction, and the other is provided with a fixing hole that selectively matches any one of the insertion holes, the positioning member has a protrusion that is biased by an elastic member to engage with the insertion hole and the fixing hole, The insertion hole is provided with a rectangular positioning portion that can be engaged with the protrusion, A fixture pedestal in which the protrusion is rectangular and the fixing hole is rectangular.

Images