Stands and equipment

Abstract

To provide a stand which can prevent an apparatus from falling when the apparatus is set in a position distant from a wall, and the apparatus.SOLUTION: The stand includes: a base; a columnar member extending from the base; a cane member slidably equipped to the columnar member; and a link rotatably attached to the columnar member and the cane member. The cane member and the link can shift to a supporting state in which the cane member and the link support the columnar member or to a folding state in which the cane member and the link become closer to the columnar member. The lower end of the cane member moves along the extension line of the lower surface of the base.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a stand and equipment.

Background Art

[0002] As disclosed in Patent Document 1 below, as an example of equipment, an improved technology of a display device provided with a stand has been studied. In this display device, the stand includes a base that can be installed on an installation surface, a support member rising from the base, and a display panel fixed to the upper end of the support member. The base has a base body to which a column member is fixed, and a drawer member that is movably attached to the base body and can be pulled out from the base body to the back side of the display device.

[0003] When the display device is installed at a position far from the wall, the drawer member is always pushed backward from the base body by the extension force of a spring built into the base body. Therefore, the base is in a wide state in the front-rear direction. On the other hand, when the display device is installed at a position close to the wall, a part of the drawer member is inserted into the base body as the spring is contracted against its extension force. Thereby, the base is in a narrow state in the front-rear direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to the above stand, when the display device is installed at a position far from the wall, if the equipment is tilted backward with the rear end of the drawer member as a fulcrum, a compression force is generated in the spring so that a part of the drawer member is inserted into the base body. Therefore, the width of the base in the front-rear direction becomes narrow. As a result, there is a risk that the equipment may fall toward the wall side.

[0006] This disclosure has been made in view of the above-mentioned problems. The purpose of this disclosure is to provide a stand and equipment that can be installed close to a wall, and also prevent the equipment from tipping over when installed far from a wall. [Means for solving the problem]

[0007] The stand of this disclosure comprises a base, a column member extending from the base, a cane member slidably mounted on the column member, and links rotatably mounted on the column member and the cane member, respectively, wherein the cane member and the links can change between a supported state that supports the column member and a folded state that approaches the column member, and the lower end of the cane member moves along the extension of the lower surface of the base.

[0008] The display device of this disclosure comprises the stand of this disclosure, and a display panel is mounted on the upper end of the column member. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of the device equipped with the stand according to Embodiment 1. [Figure 2] This is a partially cutaway side cross-sectional view showing the support state of the stand of the device equipped with the stand of Embodiment 1. [Figure 3] This is a partially cutaway side cross-sectional view showing the folded state of the stand of the device equipped with the stand of Embodiment 1. [Figure 4] This is a partially cutaway side cross-sectional view showing the support state of the stand of the device equipped with the stand of Embodiment 2. [Figure 5] This is a partially cutaway side cross-sectional view showing the support state of the stand of the device equipped with the stand of Embodiment 3. [Figure 6] This is a partially cutaway side cross-sectional view showing the support state of the stand of the device equipped with the stand of Embodiment 4. [Figure 7]This is a partially cutaway side cross-sectional view showing the folded state of the stand of the device equipped with the stand of Embodiment 4. [Figure 8] This is a schematic cross-sectional view showing the stand in Example 1 installed on the mounting surface and the equipment tilted. [Figure 9] This table shows the relationship between angle θ1, angle θ2, and resultant force D in Example 1. [Figure 10] This is a schematic cross-sectional view showing the stand in Example 2 installed on the mounting surface and the equipment tilted. [Figure 11] This table shows the relationship between angle θ1, angle θ2, and resultant force D in Example 2. [Modes for carrying out the invention]

[0010] Hereinafter, the apparatus equipped with the stand according to the embodiment of this disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant descriptions will not be repeated.

[0011] (Embodiment 1) The device 200 equipped with the stand 100 of Embodiment 1 will be described using Figures 1 to 3.

[0012] In this embodiment, the device 200 is a display device equipped with a stand 100. Specifically, the display panel 6 is mounted on the upper end of the column member 7 that constitutes the stand 100. Note that the device 200 may be any other product, such as a whiteboard, as long as it is equipped with a stand 100.

[0013] As shown in Figures 1 to 3, the stand 100 comprises a base 8, a column member 7, a cane member 9, and a link 10.

[0014] The base 8 has a plate shape, but may have any shape as long as it can be installed on the installation surface F. As the installation surface F, a floor surface, a work surface of a desk, or the like can be considered. In Embodiment 1, the base 8 has a trapezoidal shape in a cross-sectional view perpendicular to the display surface of the display panel 6 and including the vertical direction. The trapezoid in this cross-sectional view has a bottom side that contacts the installation surface F as a straight line, has two straight lines rising from that straight line, and has a hypotenuse connecting the upper ends of the two straight lines. The thickness of the front side of the base 8 is smaller than the thickness of the rear side of the base 8.

[0015] The column member 7 extends from the base 8. Specifically, when the base 8 is placed on the installation surface F, the column member 7 extends linearly vertically upward. A part of the lower end side of the column member 7 is hollow. An opening 7b is provided in a part of the lower end side of the column member 7 so as to expose the hollow portion of the column member 7. Specifically, the opening 7b is provided on the rear side among the lower end side of the column member 7. A cane member 9 described later can be inserted into the space inside the hollow portion of the column member 7 from the opening 7b. The column member 7 has elongated holes 7a extending along the direction in which the column member 7 extends on both side walls 7d of the hollow portion of the column member 7. However, the elongated holes 7a in the present embodiment extend along a curve in a side view of the device 200. A shaft member 13 is inserted into the elongated holes 7a. The shaft member 13 is fixed to a cane member 9 described later.

[0016] The cane member 9 extends linearly. The cane member 9 has two shaft members 13 protruding to the side of the device 200 at one end side thereof. The two shaft members 13 slide along two elongated holes 7a penetrating both side surfaces of the hollow column member 7, respectively. The cane member 9 moves as the shaft member 13 moves. That is, as described above, the cane member 9 is slidably attached to the column member 7. The cane member 9 is hollow. One end side of the cane member 9 is inserted into the hollow portion of the column member 7 from the opening 7b of the column member 7. The other end of the cane member 9 has a curved surface and is configured to move so as to slide with respect to the installation surface F.

[0017] Link 10 extends linearly and is rotatably attached to each of the column member 7 and the cane member 9. Specifically, one end of the link 10 is rotatably attached to the column member 7 via a cylindrical joint 12. The other end of the link 10 is rotatably attached to the cane member 9 via a cylindrical joint 11.

[0018] As shown in FIG. 2, in the support state of supporting the column member 7, the cane member 9 extends obliquely downward from the position of the shaft member 13. At this time, when the base 8 is placed on the installation surface F, the lower end (lower tip) of the cane member 9 is in contact with the installation surface F with which the base 8 is in contact. Specifically, the installation portion 15, which is a part of the curved surface of the lower end of the cane member 9, is in contact with the installation surface F. At this time, the lower end of the cane member 9 is in the state of being farthest from the column member 7. Thereby, the cane member 9 resists the tipping moment generated in the device 200 so as to prevent the device 200 from tipping backward. That is, in the support state of the stand 100, the cane member 9 supports the column member 7. Therefore, in the support state of the stand 100, even when the device 200 is installed at a position away from the wall W, the risk of the device 200 tipping over can be reduced.

[0019] When changing the equipment 200 from the supported state of the stand 100 shown in Figure 2 to the folded state of the stand 100 shown in Figure 3, the shaft member 13 of the cane member 9 is slid upward along the elongated hole 7a. As a result, the mounting portion 15 that constitutes the lower end of the cane member 9 moves along the extension of the lower surface of the base 8 (in Figures 2 and 3, this is approximately the same as the mounting surface F). In other words, the mounting portion 15 moves closer to the column member 7. Therefore, as shown in Figure 3, in the folded state of the stand 100, the cane member 9 and the link 10 approach a state where they extend along the column member 7. At this time, the cane member 9 is partially housed in the space inside the hollow portion of the column member 7. Similarly, the link 10 is also partially housed in the space inside the hollow portion of the cane member 9. Therefore, in the folded state of the stand 100, the column member 7 can be brought as close as possible to the wall W. Furthermore, in the folded state of the stand 100, even if a force acting in the direction of tipping over is applied to the equipment 200, the equipment 200 is supported by the wall W, and therefore the tipping of the equipment 200 is suppressed by the wall W.

[0020] As described above, in this embodiment, the cane member 9 and link 10 constituting the stand 100 can change between a supporting state that supports the column member 7 and a folded state that extends along the column member 7. The lower end of the cane member 9 moves along the extension of the lower surface of the base 8. Therefore, as shown in Figure 2, if you want to install the equipment 200 far from the wall W, by putting the cane member 9 and link 10 in the supporting state, you can prevent the equipment 200 from tipping over even if it is tilted to the rear. On the other hand, if you want to install the equipment 200 close to the wall W, by putting the cane member 9 and link 10 in the folded state, you can easily bring the equipment 200 closer to the wall W.

[0021] (Embodiment 2) Embodiment 2 will be described using Figure 4. Note that the same aspects as Embodiment 1 will not be repeated below. This embodiment differs from Embodiment 1 in the following respects.

[0022] In this embodiment, the stand 100 further includes an elastic body 18 that generates force between the column member 7 and the cane member 9 so that the tip of the cane member 9 is furthest away from the column member 7, thus differing from the previously described embodiment. Therefore, when the equipment 200 is installed far from the wall W, the tipping of the equipment 200 can be more reliably prevented.

[0023] As shown in Figure 4, the elastic body 18 is in contact with the column member 7 and the link 10 in such a way that it generates a biasing force on the column member 7 and the link 10. As a result, the joint 11 rotates around the rotational axis of the joint 12, moving away from the column member 7 and approaching the mounting surface F. Specifically, in this embodiment, the stand 100 is equipped with a torsion spring as the elastic body 18. The helical portion 18a of the torsion spring is attached to the joint 12 of the link 10. Two tip portions 18b and 18c extend from the helical portion 18a of the torsion spring along two intersecting straight lines. One tip portion 18b is in contact with the inner wall of the hollow portion of the column member 7. The other tip portion 18c is in contact with the side wall 10a of the inner wall of the link 10 that is closer to the extension line of the lower surface of the base 8 (mounting surface F).

[0024] The torsion spring (elastic body 18) applies force to the column member 7 and the link 10, respectively, from its helical portion 18a, such that the angle between its two tip portions 18b and 18c increases. As a result, the link 10 rotates relative to the column member 7 so that the joint 11 of the link 10 moves away from the column member 7. In other words, the joint 11 rotates around the joint 12 as the center of rotation. This causes the shaft member 13 to move downward, and as shown in Figure 4, the link 10 and the cane member 9 form the letter λ. At this time, the lower end of the cane member 9 moves away from the column member 7.

[0025] According to this embodiment, the stand 100 is equipped with an elastic body 18, which allows the support state of the stand 100 to be maintained more reliably. Therefore, the tipping of the equipment can be more reliably prevented.

[0026] In this embodiment, an example has been described in which the stand 100 is equipped with a torsion spring as the elastic body 18, but this disclosure is not limited to this configuration. The elastic body 18 can be any type as long as it generates the biasing force described above on the link 10 and the column member 7 in order to maintain the support state of the stand 100.

[0027] (Embodiment 3) Embodiment 3 will be described using Figure 5. Note that the same aspects as Embodiment 2 will not be repeated below. This embodiment differs from Embodiment 2 in the following respects.

[0028] This embodiment differs from the previously described embodiment 2 in that the elastic body 19 is provided on the cane member 9 and the column member 7.

[0029] As shown in Figure 5, in this embodiment, the stand 100 is equipped with a tension coil spring as the elastic body 19. The tension coil spring comprises a coil portion 19a, a ring-shaped end 19b, and a ring-shaped other end 19c. The one end 19b of the tension coil spring is hooked onto the shaft member 13 of the cane member 9. The other end 19c of the tension coil spring is hooked onto a projection 7c that protrudes inward from the inner surface of the column member 7. Note that in Figure 5, the other end 19c of the tension coil spring may also be hooked onto the joint 12.

[0030] When the other end 19c of the tension coil spring is hooked onto the protrusion 7c, the contracting force of the tension coil spring presses the shaft member 13 against the lower end of the elongated hole 7a. As a result, the link 10 and the cane member 9 rotate so that the cane member 9 and the column member 7 form a shape resembling the letter λ. At this time, the lower end of the cane member 9 is furthest from the column member 7. Consequently, the support state of the stand 100 can be maintained more reliably. Therefore, the tipping of the equipment can be more reliably prevented.

[0031] As explained above, even if the stand 100 is equipped with a tensile coil spring as the elastic body 19, the tipping of the equipment 200 can be effectively suppressed.

[0032] (Embodiment 4) Embodiment 4 will be described using Figures 6 and 7. Note that the same points as in Embodiments 1 to 3 will not be repeated below.

[0033] In this embodiment, the stand 100 further includes an arm 20. Also, in this embodiment, the position where the elastic body 18, which is made of a torsion spring, is provided differs from that of Embodiment 1. In this embodiment, the elastic body 18 exerts force on the cane member 9 and the link 10 such that the cane member 9 and the link 10 are λ-shaped.

[0034] The arm 20 is slidably mounted on the base 8 and rotatably attached to the cane member 9 around the hinge 22. More specifically, a hollow arm storage section 21 is provided inside the base 8. The arm 20 slides within the arm storage section 21 when the stand 100 changes between its supported state and its folded state.

[0035] As shown in Figure 6, in the supported state, the arm 20 is exposed from the arm storage section 21 of the base 8 and is located below the inclined cane member 9. Therefore, the stability of the equipment 200 can be improved when the stand 100 is in the supported state.

[0036] Furthermore, as shown in Figure 7, when the stand 100 is folded, the arm 20 is stored in the arm storage section 21. Therefore, when the stand 100 is folded, the column member 7 can be brought as close as possible to the wall W, similar to the state shown in Figure 3.

[0037] (Example 1) Using the stand 100 described in this disclosure, we verified the state of the stand 100 when the user tilts the device 200.

[0038] Figure 8 shows the stand 100 used for verification. In this embodiment, a coil spring is used as the elastic body 17. The coil spring is provided at the end of the link 10 that is fixed to the cane member 9, and generates a biasing force in the direction in which the cane member 9 extends.

[0039] The reference numerals shown in Figure 8 below are defined as follows: The center point 16 indicates the center position of the tip of the cane member 9 on the mounting surface side. Distance L represents the distance to the center point 16 of the other end. Distance L1 represents the distance from the center of one end of the cane member 9 (the center of the shaft member 13) to the center of the joint 11. Distance L2 represents the distance from the center of joint 11 to the center point 16 of the other end of the cane member 9. Angle θ1 represents the angle at which the device 200 is tilted backward. Angle θ2 represents the angle between the extension of the lower surface of the base 8 and the center of the cane member 9 (the straight line connecting the center point 16 and the center of the joint 11) when the shaft member 13 is located at the bottom of the opening 7b.

[0040] Furthermore, when the upper part of the stand 100 is tilted backward, a normal force A equal to the total mass of the equipment 200 is generated on the cane member 9 from the surface it is mounted on. This normal force A can be decomposed into a component force Ax in the direction in which the cane member 9 extends and a component force Ay in the direction perpendicular to the direction in which the cane member 9 extends. These component forces Ax and Ay can also be replaced by forces B and C, respectively, centered on the shaft member 13. Based on the above, according to the principle of levers, Ay·L2=B·L1 Since the above holds true, the magnitude of force B can be expressed by the following equation.

[0041] B = (L2 / L1) · Ay On the other hand, since the magnitude of force C is the same as the magnitude of component force Ax, C=Ax This is the result. Furthermore, forces B and C can be decomposed into forces Bx and Cx, which are perpendicular to the direction in which the column member 7 extends, and forces By and Cy, which are parallel to the direction in which the column member 7 extends. Also, if force By - force Cy is taken as the resultant force D, D = By - Cy It can be expressed as follows.

[0042] When the upper end of the device 200 is pressed and tilted θ1 toward the rear, the forces B and C can be expressed using the normal force A. B=(L2 / L1)·Ay=(L2 / L1)·Acos(θ1+θ2) C = Ax = Asin(θ1 + θ2) This is the result. Here, By·Cy can be expressed using A as By=Bcosθ2=(L2 / L1)·Acos(θ1+θ2)·cosθ2 Cy=C・sinθ2=Asin(θ1+θ2)・sinθ2 Therefore, the resultant force D is D=(L2 / L1)·Acos(θ1+θ2)·cosθ2-Asin(θ1+θ2)·sinθ2 This is the result.

[0043] Figure 9 shows the measurement results of the resultant force D when angles θ1 and θ2 are changed under the above conditions.

[0044] Here, when the resultant force D is 0 or a positive value, even if the upper end of the device 200 is tilted towards the rear, the cane member 9 will not move towards the column member 7 in the direction of arrow d. For example, if the length L2 is set to 1.25 times the length L1 and the angle θ2 is set to 30 degrees, even if the device 200 is tilted to a value where the resultant force D is 0, i.e., angle θ1 = 35 degrees, the lower end of the cane member 9 will not move in the direction of arrow d (dark gray area in Figure 9).

[0045] Based on the above results, compared to a configuration in Patent Document 1 in which the shape of the bottom surface contracts simply by tilting the display device, the tipping of the device 200 in this disclosure can be suppressed.

[0046] Furthermore, according to official safety standards for display devices, for devices with a product mass of 25 kg or more, the display device must not tip over when the angle θ1 is 15 degrees or less (IEC62368-1 Ed.3).

[0047] Furthermore, as can be seen from Figure 9, when length L2 is 1.25 times length L1 (K=1.25), in order to meet the official standards, angle θ2 must be set to 40 degrees or less (light gray area in Figure 9).

[0048] (Example 2) Example 2 will be described using Figures 10 and 11.

[0049] In Example 2, L1=L2=L3 Assuming this was the case, the resultant force D was measured. The measurement results are shown in Figure 11.

[0050] In this embodiment, the resultant force D can be expressed by the following formula.

[0051] D=(L2 / L1)·Acos(θ1+θ2)·cosθ2-Asin(θ1+θ2)·sinθ2 In this embodiment, since lengths L1 and L2 are the same, the following equation holds true.

[0052] D=(L / L)·Acos(θ1+θ2)·cosθ2-Asin(θ1+θ2)·sinθ2 =Acos(θ1+θ2)·cosθ2-Asin(θ1+θ2)·sinθ2 =A(cos(θ1+θ2)cosθ2-sin(θ1+θ2)sinθ2) =A((cosθ1cosθ2-sinθ1sinθ2)cosθ2-(sinθ1cosθ2+cosθ1sinθ2)sinθ2) =A(cosθ1cos2θ2-sinθ1sinθ2cosθ2-sinθ1cosθ2sinθ2-cosθ1sin2θ2) =A(cosθ1cos2θ2-cosθ1sin2θ2-sinθ1sinθ2cosθ2-sinθ1cosθ2sinθ2) =A(cosθ1(cos2θ2-sin2θ2)-2sinθ1sinθ2cosθ2) =A(cosθ1cos2θ2-sinθ1(2sinθ2cosθ2)) =A(cosθ1cos2θ2-sinθ1sin2θ2) =A(cosθ1sin(90°-2θ2)-sinθ1cos(90°-2θ2)) =A(cosθ1sin2(45°-θ2)-sinθ1cos2(45°-θ2)) =A(sin2(45°-θ2)cosθ1-cos2(45°-θ2)sinθ1) =Asin(2(45°-θ2)-θ1) Here, 0°≦2(45°-θ2)-θ1≦180° If this is the case, it means that the resultant force D is a positive value.

[0053] Also, 0°≦90°-2θ2-θ1≦180° θ1 ≤ 90° - 2θ2 Therefore, if the angle between the lower surface of the stand 100 and the direction in which the cane member 9 extends is θ2, and the angle θ1 when the upper end of the device 200 is tilted toward the rear is (90°-2θ2) or less, the device 200 will not tip over.

[0054] As explained above, if we assume L1=L2=L3, as in this embodiment, the relationship between angles θ1 and θ2 can be expressed by a simple equation.

[0055] Furthermore, in this embodiment, the shape of the elongated hole 7a can be formed in a straight line extending vertically from the joint 12. This minimizes the width occupied by the column member 7 in the front-to-back direction.

[0056] Although embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments. Each configuration and combination thereof in each embodiment is merely an example, and additions, omissions, substitutions, and other modifications are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited by the embodiments, but is limited only by the claims. [Explanation of symbols]

[0057] 7 Column members 8 Base 9 Cane parts 10 links 11,12 Joint 20 Arms 100 stands 200 equipment

Claims

1. Bass and, When the base is placed on the surface to be installed, a column member extends vertically upward in a straight line from the base, A cane member slidably mounted on the column member, A link is rotatably attached to each of the column member and the cane member, A display panel attached to the upper end of the column member, Equipped with, The cane member is provided on the back side of the column member, The base is provided on the side of the column member opposite to the rear side, The cane member and the link can change between a supported state that supports the column member and a folded state that approaches the column member. The lower end of the cane member moves along the extension of the planar lower surface of the base that contacts the surface to be installed, The base is in contact with the surface to be installed in both the supported state and the folded state. A display device equipped with a stand.

2. The system further includes an elastic body that generates force between the column member and the cane member so that the tip of the cane member is in the position furthest from the column member. The display device according to claim 1.

3. The system further includes an elastic body that generates force between the column member and the link such that the tip of the cane member is in the position furthest from the column member. The display device according to claim 1.

4. The display device according to claim 1, further comprising an arm slidably mounted on the base and rotatably attached to the cane member.

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