Stoppers and instrument stands

Abstract

To provide a stopper and an instrument stand that can prevent the instrument stand from moving while the instrument is being played. [Solution] The stopper 20 is attached to the leg 12 of the instrument stand and contacts the mounting surface FL of the instrument stand. The stopper 20 comprises a first contact portion 21 having a first contact surface 26 that contacts the mounting surface FL, and a second contact portion 30 having a second contact surface 31 that contacts the mounting surface FL and is configured to extend and retract relative to the first contact surface 26. When the first contact surface 26 is not in contact with the mounting surface FL, the second contact portion 30 always protrudes from the first contact surface 26, and when the first contact surface 26 is in contact with the mounting surface FL, the second contact surface 31 is configured to contact the mounting surface FL.

Description

Technical Field

[0001] The present invention relates to a stopper and a musical instrument stand.

Background Art

[0002] Patent Document 1 discloses a snare stand that supports a snare drum. The snare stand includes a basket to which the snare drum is attached and a stand body that supports the basket. The stand body includes a main pipe and a plurality of leg plates provided foldably with respect to the main pipe. At the tip of each leg plate, a rubber stopper that contacts the installation surface of the snare stand is attached.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the snare stand described in Patent Document 1, displacement of the snare stand with respect to the installation surface is suppressed by the stoppers attached to each leg plate. However, due to the impact when struck by a performer, the snare stand may instantaneously lift off the floor surface, causing the snare stand to move. In this case, since the position of the snare drum with respect to the performer changes, it becomes difficult for the performer to play the snare drum. Such problems are not limited to snare stands, but also occur in the same manner in various musical instrument stands such as cymbal stands that support cymbals. Therefore, there is room for improvement in suppressing the movement of musical instrument stands during the performance of musical instruments.

Means for Solving the Problems

[0005] This document describes various forms of stoppers and instrument stands designed to solve the above problems. [Aspect 1] A stopper attached to the leg of a musical instrument stand and in contact with the mounting surface of the musical instrument stand, comprising: a first contact portion having a first contact surface that contacts the mounting surface; and a second contact portion having a second contact surface that contacts the mounting surface and configured to extend and retract relative to the first contact surface, wherein when the first contact surface is not in contact with the mounting surface, the second contact portion always protrudes from the first contact surface, and when the first contact surface is in contact with the mounting surface, the second contact surface comes into contact with the mounting surface.

[0006] According to the above configuration, when the first contact surface of the first contact part is not in contact with the mounting surface, the second contact part always protrudes from the first contact surface. When the first contact surface is in contact with the mounting surface, the second contact surface of the second contact part also comes into contact with the mounting surface. Therefore, if the first contact part lifts off the mounting surface due to the impact when a performer plays an instrument, the second contact part protrudes from the first contact surface and comes into contact with the mounting surface, thereby restricting the movement of the instrument stand. Consequently, the movement of the instrument stand during instrument playing can be suppressed.

[0007] [Aspect 2] The stopper according to [Aspect 1], wherein the first contact portion has a recess that opens to the first contact surface and accommodates the second contact portion, and when the first contact surface is in contact with the installation surface, the second contact surface of the second contact portion that has been retracted into the recess comes into contact with the installation surface.

[0008] According to the above configuration, since the second contact portion retracts into the recess, when the first contact surface is in contact with the mounting surface, the second contact surface also becomes more likely to come into contact with the mounting surface. [Aspect 3] The stopper according to [Aspect 2], further comprising a movable part that elastically deforms when the second contact portion retracts into the recess.

[0009] According to the above configuration, the second contact portion retracts into the recess due to the elastic deformation of the movable part. Therefore, when both the first and second contact surfaces are in contact with the mounting surface, the second contact surface of the second contact portion, under the restoring force of the movable part, is in contact with the mounting surface. As a result, when the first contact portion lifts away from the mounting surface, the restoring force of the movable part causes the second contact portion to protrude from the recess, making it easier for the second contact surface to come into contact with the mounting surface.

[0010] [Aspect 4] The stopper according to [Aspect 2] or [Aspect 3], wherein the first contact surface has two contact regions located on opposite sides of the opening of the recess. According to the above configuration, the second contact portion protrudes from a recess that opens between the two contact areas. Therefore, when the second contact portion is retracted into the recess, it becomes difficult to see from the outside. Thus, the aesthetic appearance of the stopper can be prevented from being compromised.

[0011] [Aspect 5] The stopper according to any one of [Aspect 1] to [Aspect 4], wherein the second contact portion is made of rubber. With the above configuration, the frictional force generated between the second contact surface and the installation surface can be increased compared to the case where the second contact portion is formed of a hard material.

[0012] [Aspect 6] The stopper according to [Aspect 3], wherein the first contact portion, the second contact portion, and the movable portion are integrally formed of rubber. With the above configuration, the complexity of the stopper's structure can be suppressed compared to the case where the first contact part, the second contact part, and the movable part are configured as separate components.

[0013] [Aspect 7] The stopper according to [Aspect 6], further comprising two movable parts that connect two opposing portions on the inner surface of the recess and two portions located on opposite sides of the central portion of the second contact portion.

[0014] According to the above configuration, the inner surface of the recess and the second contact portion are connected by two movable parts. Therefore, the behavior of the second contact portion when it extends and retracts relative to the first contact surface becomes more stable. Consequently, the movement of the instrument stand can be effectively suppressed.

[0015] [Aspect 8] The stopper according to [Aspect 7], wherein the two movable parts extend inclined with respect to both the surface direction of the second contact surface and a direction perpendicular to the surface direction. According to the above configuration, when the second contact portion retracts into the recess, the second contact portion becomes more susceptible to the force that causes each movable part to elastically deform. This allows the second contact portion to retract smoothly into the recess.

[0016] [Aspect 9] The stopper according to any one of [Aspect 6] to [Aspect 8], wherein the movable part is plate-shaped, and the vertical thickness of the second contact part is greater than the plate thickness of the movable part.

[0017] According to the above configuration, since the vertical thickness of the second contact portion is greater than the plate thickness of the movable portion, when the second contact portion retracts into the recess, the movable portion is more likely to undergo elastic deformation preferentially over the second contact portion. As a result, the behavior of the second contact portion when it moves in and out of the first contact surface becomes more stable.

[0018] [Aspect 10] The stopper according to any one of [Aspect 1] to [Aspect 9], wherein the area of ​​the first contact surface is larger than the area of ​​the second contact surface. According to the above configuration, the area of ​​the first contact surface on which the weight of the instrument stand acts is larger than the area of ​​the second contact surface. Therefore, the stability of the instrument stand can be improved when both the first and second contact surfaces are in contact with the mounting surface.

[0019] [Aspect 11] A musical instrument stand, comprising a stopper attached to the leg portion of the musical instrument stand and contacting the installation surface of the musical instrument stand. The stopper includes a first contact portion having a first contact surface contacting the installation surface, and a second contact portion having a second contact surface contacting the installation surface and configured to be able to protrude and retract with respect to the first contact surface. In a state where the first contact surface is not in contact with the installation surface, the second contact portion always protrudes from the first contact surface. In a state where the first contact surface is in contact with the installation surface, the second contact surface is configured to contact the installation surface. A musical instrument stand.

[0020] According to the above configuration, the same operational effects as those of the stopper described in [Aspect 1] can be achieved.

Effects of the Invention

[0021] According to the present invention, the movement of the musical instrument stand during the performance of the musical instrument can be suppressed.

Brief Description of the Drawings

[0022] [Figure 1] FIG. 1 is a perspective view of a musical instrument stand. [Figure 2] FIG. 2 is a cross-sectional view of the stopper. [Figure 3] FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2. [Figure 4] FIG. 4 is a bottom view of the stopper. [Figure 5] FIG. 5 is a cross-sectional view of the stopper in a state where the second contact portion protrudes from the first contact surface. [Figure 6] FIG. 6 is a cross-sectional view of the stopper in a state where the first contact portion and the second contact portion are in contact with the installation surface. [Figure 7] FIG. 7 is a bottom view of the stopper of the first modification example. [Figure 8] FIG. 8 is a bottom view of the stopper of the second modification example. [Figure 9] FIG. 9 is a side view of the stopper of the second modification example. [Modes for carrying out the invention]

[0023] An embodiment of the stopper and instrument stand will be described below with reference to Figures 1 to 6. (Configuration of instrument stands) As shown in Figure 1, the instrument stand (hereinafter referred to as the stand 10) comprises a vertically extending support column 11, three legs 12 extending from the support column 11, and three stays 13 that foldably connect the three legs 12 to the support column 11. The support column 11 supports percussion instruments such as snare drums and cymbals (not shown).

[0024] The stand 10 is equipped with three stoppers 20 attached to the tips of each of its three legs 12. The stoppers 20 restrict the movement of the stand 10 by contacting the mounting surface FL of the stand 10.

[0025] (Overall configuration of Stopper 20) As shown in Figure 2, the stopper 20 comprises a first contact portion 21, a second contact portion 30, and two movable portions 33. The first contact portion 21, the second contact portion 30, and the two movable portions 33 are integrally formed from rubber.

[0026] In the following explanation, the directions extending along the X, Y, and Z axes shown in some of the drawings will be referred to as the X-axis direction, Y-axis direction, and Z-axis direction, respectively. The X-axis direction, Y-axis direction, and Z-axis direction are orthogonal to each other. For convenience, in the following explanation of the stopper 20, the Z-axis direction will be assumed to coincide with the vertical direction.

[0027] (Configuration of the first contact portion 21) As shown in Figures 2 and 3, the first contact portion 21 has a pair of side walls 22, a front wall 23, and a rear wall 24. The pair of side walls 22 face each other in the X-axis direction and extend parallel to each other in the Z-axis direction. The front wall 23 connects the first ends of the pair of side walls 22 in the Y-axis direction. The rear wall 24 connects the second ends of the pair of side walls 22 that are opposite to the first ends. The outer surfaces of the front wall 23 and the rear wall 24 extend so that they move further apart from each other in the Y-axis direction as they extend downwards.

[0028] The first contact portion 21 has a receiving recess 25 that accommodates the tip of the leg portion 12. The receiving recess 25 extends in the Z-axis direction and opens to the upper surface of the first contact portion 21. The receiving recess 25 is formed by a pair of side walls 22, a front wall 23, and a rear wall 24. The opening of the receiving recess 25 is rectangular in shape, elongated in the Y-axis direction when viewed from above.

[0029] As shown in Figure 4, the first contact portion 21 has a first contact surface 26 that contacts the installation surface FL. The first contact surface 26 constitutes the lower surface of the stopper 20, or more specifically, the lower surface of each side wall 22. The area of ​​the first contact surface 26 is larger than the area of ​​the second contact surface 31, which will be described later.

[0030] The first contact surface 26 has a groove pattern formed by a plurality of grooves 27. The groove pattern of the first contact surface 26 functions as an anti-slip feature for the stopper 20. As shown in Figures 2 and 6, the first contact surface 26 is curved in an arc shape so as to be convex downwards. When the stopper 20 contacts the installation surface FL, a portion of the first contact surface 26 contacts the installation surface FL. The contact point between the first contact surface 26 and the installation surface FL changes depending on the orientation of the three legs 12 relative to the support column 11.

[0031] As shown in Figures 2 and 3, the first contact portion 21 has a recess 28 that opens into the first contact surface 26. The recess 28 opens in the center of the first contact surface 26 in the X-axis direction. The recess 28 and the receiving recess 25 are in communication in the Z-axis direction. The recess 28 is formed by a pair of side walls 22, a front wall 23, and a rear wall 24. The opening of the recess 28 is a long rectangle in the Y-axis direction when viewed from below. As shown in Figure 2, the inner surfaces of the front wall 23 and the rear wall 24 that constitute the recess 28 widen so that they are on opposite sides of each other in the Y-axis direction as you move downwards. Therefore, the dimension of the recess 28 in the Y-axis direction gradually increases as you move downwards.

[0032] As shown in Figure 4, the first contact surface 26 has two contact regions 26a. The two contact regions 26a are located on opposite sides of each other in the X-axis direction, with the opening of the recess 28 in between. The areas of the two contact regions 26a are identical.

[0033] (Configuration of the second contact portion 30) As shown in Figure 2, the second contact portion 30 is housed inside the recess 28. The second contact portion 30 has a substantially rectangular parallelepiped shape that is elongated in the Y-axis direction. The second contact portion 30 is configured to extend and retract relative to the first contact surface 26. The second contact portion 30 has a second contact surface 31 that contacts the installation surface FL. The second contact surface 31 constitutes the lower surface of the stopper 20. The second contact surface 31 is curved in an arc shape so as to be convex downwards. The second contact surface 31 extends along the first contact surface 26.

[0034] As shown in Figure 3, the dimension of the second contact portion 30 in the X-axis direction is smaller than the dimension of the opening of the recess 28 in the X-axis direction. Therefore, the second contact portion 30 does not contact the pair of side walls 22. As shown in Figure 4, the second contact surface 31 has a groove pattern formed by a plurality of grooves 32. The groove pattern of the second contact surface 31 functions as an anti-slip feature for the stopper 20. The groove pattern of the second contact surface 31 is different from the groove pattern of the first contact surface 26.

[0035] (Configuration of the movable part 33) As shown in Figure 2, the two movable parts 33 connect the first contact part 21 and the second contact part 30. More specifically, the two movable parts 33 connect two parts of the inner surface of the recess 28 that are opposite each other in the Y-axis direction, and two parts of the second contact part 30 that are on opposite sides of each other in the Y-axis direction, with the central part of the second contact part 30 in between. Therefore, the two movable parts 33 are connected to the front wall 23 and the rear wall 24, respectively.

[0036] The two movable parts 33 extend parallel to each other in the direction of the central axis of the receiving recess 25, i.e., in the Z-axis direction. The two movable parts 33 extend inclined with respect to both the surface direction of the second contact surface 31 and the direction perpendicular to the surface direction. The movable parts 33 are flat plates with the Y-axis direction as the plate thickness direction.

[0037] As shown in Figure 5, the thickness t1 of the second contact portion 30 in the vertical direction, or more specifically, the thickness t1 of the second contact portion 30 in the direction perpendicular to the second contact surface 31, is greater than the thickness t2 of the movable portion 33 in the plate thickness direction. Note that the thickness t1 varies depending on the position in the Y-axis direction of the second contact portion 30, but the minimum value of the thickness t1 is greater than the thickness t2.

[0038] As shown in Figure 3, the dimensions of each movable part 33 in the X-axis direction are the same as the dimensions of the second contact part 30 in the X-axis direction. A slit 34 is formed between each movable part 33 and the pair of side walls 22. Therefore, each movable part 33 does not come into contact with the pair of side walls 22.

[0039] As shown in Figure 2, the lengths of the two movable parts 33 are set to the length at which the second contact part 30 protrudes from the recess 28. Therefore, when the first contact surface 26 is not in contact with the installation surface FL, the second contact part 30 always protrudes from the first contact surface 26. At this time, a part of the second contact part 30 is located inside the recess 28.

[0040] As shown in Figures 5 and 6, the two movable parts 33 undergo elastic deformation when the second contact part 30 retracts into the recess 28. More specifically, when the stand 10 is installed on the installation surface FL, the second contact part 30 is pressed against the installation surface FL, causing the two movable parts 33 to elastically deform so as to buckle in the same direction. As the two movable parts 33 elastically deform, the second contact part 30 retracts into the recess 28. The second contact part 30 retracts until the second contact surface 31 is on the same plane as the first contact surface 26, so that the first contact surface 26 comes into contact with the installation surface FL. Therefore, when the first contact surface 26 is in contact with the installation surface FL, the second contact surface 31 is also in contact with the installation surface FL. At this time, the entire second contact part 30 is located inside the recess 28.

[0041] <Operation of this embodiment> As shown in Figure 6, when the stand 10 is installed on the mounting surface FL, both the first contact surface 26 and the second contact surface 31 of the second contact portion 30, which is retracted into the recess 28, are in contact with the mounting surface FL. When a percussion instrument supported by the stand 10 is struck by a performer in this state, the impact of the strike may cause the stand 10 to lift off the mounting surface FL. At this time, as shown in Figure 5, if the first contact portion 21 of the stopper 20 lifts off the mounting surface FL due to the impact, the restoring force of the two elastically deformed movable parts 33 causes the second contact portion 30 to protrude from the first contact surface 26 toward the mounting surface FL. As a result, the second contact surface 31 comes into contact with the mounting surface FL. Therefore, even if the first contact portion 21 lifts off the mounting surface FL, the stopper 20 remains in contact with the mounting surface FL.

[0042] <Effects of this embodiment> (1) When the first contact surface 26 is not in contact with the installation surface FL, the second contact portion 30 always protrudes from the first contact surface 26. When the first contact surface 26 is in contact with the installation surface FL, the second contact surface 31 comes into contact with the installation surface FL.

[0043] According to the above configuration, when the first contact surface 26 of the first contact portion 21 is not in contact with the installation surface FL, the second contact portion 30 always protrudes from the first contact surface 26. When the first contact surface 26 is in contact with the installation surface FL, the second contact surface 31 of the second contact portion 30 also comes into contact with the installation surface FL. Therefore, if the first contact portion 21 is lifted off the installation surface FL by the impact of a performer playing a percussion instrument, the second contact portion 30 protrudes from the first contact surface 26 and comes into contact with the installation surface FL, thereby restricting the movement of the stand 10. Thus, the movement of the stand 10 during percussion instrument performance can be suppressed.

[0044] (2) When the first contact surface 26 is in contact with the installation surface FL, the second contact surface 31 of the second contact portion 30, which has been retracted into the recess 28, comes into contact with the installation surface FL. With the above configuration, since the second contact portion 30 retracts into the recess 28, when the first contact surface 26 is in contact with the installation surface FL, the second contact surface 31 also becomes more likely to come into contact with the installation surface FL.

[0045] (3) The stopper 20 includes a movable part 33 that elastically deforms when the second contact part 30 retracts into the recess 28. According to the above configuration, the second contact portion 30 retracts into the recess 28 due to the elastic deformation of the movable portion 33. Therefore, when both the first contact surface 26 and the second contact surface 31 are in contact with the installation surface FL, the second contact surface 31 of the second contact portion 30, which is under the restoring force of the movable portion 33, is in contact with the installation surface FL. As a result, when the first contact portion 21 lifts off the installation surface FL, the restoring force of the movable portion 33 causes the second contact portion 30 to protrude from the inside of the recess 28, making it easier for the second contact surface 31 to come into contact with the installation surface FL.

[0046] (4) The first contact surface 26 has two contact regions 26a located on opposite sides of the opening of the recess 28. According to the above configuration, the second contact portion 30 protrudes from the recess 28 that opens between the two contact areas 26a. Therefore, when the second contact portion 30 is retracted into the recess 28, it becomes difficult to see the second contact portion 30 from the outside. Thus, the aesthetic appearance of the stopper 20 can be prevented from being compromised.

[0047] (5) The first contact portion 21, the second contact portion 30, and the movable portion 33 are integrally formed from rubber. With the above configuration, the complexity of the stopper 20's structure can be suppressed compared to the case where the first contact portion 21, the second contact portion 30, and the movable portion 33 are configured as separate parts.

[0048] Furthermore, with the above configuration, the frictional force generated between the second contact surface 31 and the installation surface FL can be increased compared to the case where the first contact portion 21 and the second contact portion 30 are formed from a hard material.

[0049] (6) The two movable parts 33 connect two opposing parts on the inner surface of the recess 28 and two parts located on opposite sides of the central part of the second contact part 30, respectively.

[0050] According to the above configuration, the inner surface of the recess 28 and the second contact portion 30 are connected by two movable parts 33. Therefore, the behavior of the second contact portion 30 when it moves in and out of the first contact surface 26 becomes more stable. Consequently, the movement of the stand 10 can be effectively suppressed.

[0051] (7) The two movable parts 33 are inclined and extend with respect to both the plane direction of the second contact surface 31 and the direction perpendicular to the plane direction. According to the above configuration, when the second contact portion 30 retracts into the recess 28, the second contact portion 30 becomes more susceptible to the force required to elastically deform each movable portion 33. This allows the second contact portion 30 to retract smoothly into the recess 28.

[0052] (8) The vertical thickness t1 of the second contact portion 30 is greater than the plate thickness t2 of the movable portion 33. According to the above configuration, since the vertical thickness t1 of the second contact portion 30 is greater than the plate thickness t2 of the movable portion 33, when the second contact portion 30 retracts into the recess 28, the movable portion 33 is more likely to undergo elastic deformation preferentially than the second contact portion 30. As a result, the behavior of the second contact portion 30 when it moves in and out of the first contact surface 26 becomes more stable.

[0053] (9) The area of ​​the first contact surface 26 is larger than the area of ​​the second contact surface 31. With the above configuration, the area of ​​the first contact surface 26, on which the weight of the stand 10 acts, is larger than the area of ​​the second contact surface 31. Therefore, the stability of the stand 10 can be improved when both the first contact surface 26 and the second contact surface 31 are in contact with the installation surface FL.

[0054] <Example of changes> This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0055] The stand 10 may include at least one leg portion 12 and at least one stopper 20 attached to the leg portion 12. Stand 10 may support percussion instruments other than snare drums and cymbals, or it may support instruments other than percussion instruments.

[0056] The area of ​​the first contact surface 26 may be less than or equal to the area of ​​the second contact surface 31. A groove pattern may not be formed on either the first contact surface 26 or the second contact surface 31, nor may a groove pattern be formed on both the first contact surface 26 and the second contact surface 31.

[0057] The vertical thickness t1 of the second contact portion 30 may be less than or equal to the plate thickness t2 of the movable portion 33. The two movable parts 33 may extend in a direction perpendicular to the plane direction of the second contact surface 31.

[0058] The two movable parts 33 do not have to extend parallel to each other. That is, the inclination angles of the second contact surfaces 31 of the two movable parts 33 with respect to the surface direction may be different from each other. The stopper 20 may or may not have a single movable part 33.

[0059] At least one of the first contact portion 21 and the second contact portion 30 may be made of a material other than rubber, such as a hard resin material. In this case, the first contact portion 21, the second contact portion 30, and the movable portion 33 may be formed as separate parts.

[0060] The movable part 33 may be an elastic body separate from the first contact part 21 and the second contact part 30, such as a leaf spring or a coil spring. The second contact portion 30 may always protrude from the first contact surface 26 by its own weight when the first contact surface 26 is not in contact with the installation surface FL. In this case, the movable portion 33 does not need to elastically deform when the second contact portion 30 retracts into the recess 28. An example of such a movable portion 33 is one that connects the first contact portion 21 and the second contact portion 30 and is provided to slide vertically relative to the first contact portion 21.

[0061] As shown in Figure 7, the first contact portion 21 may have a groove-shaped recess 128 that opens to the outer surface of one side wall 22 and the lower surface of the first contact surface 26, instead of the recess 28. In this modified example of the stopper 120, the movable portion 33 and the second contact portion 30 are exposed to the outside. The recess 128 in this modified example does not communicate with the receiving recess 25. The recess 128 may be provided on both sides of the first contact portion 21 in the X-axis direction.

[0062] As shown in Figure 8, the first contact portion 21 may have a pair of notches 40 formed at both corners in the X-axis direction on the lower surface of the first contact portion 21, instead of the recess 28. Each notch 40 extends over the entire Y-axis direction of the first contact portion 21. As shown in Figure 9, the inner surface of each notch 40 includes an opposing surface 41 that is located above the first contact surface 26 and faces the installation surface FL. A step is formed in the first contact portion 21 by the first contact surface 26 and each opposing surface 41. Two movable parts 33 are connected to the opposing surface 41 of each notch 40. Therefore, each movable part 33 and the second contact portion 30 are exposed to the outside. In this modified example of the stopper 220, the structure including the notches 40, movable parts 33, and second contact portion 30 is provided at both ends in the X-axis direction. The above structure may be provided only at one end of the stopper 220 in the X-axis direction, or at one end or both ends in the Y-axis direction. [Explanation of symbols]

[0063] FL…Installation surface t1, t2… thickness 10… Stand 11...Strut 12...legs 13... Stay 20,120,220... Stopper 21...First contact part 22…Side wall 23...Front wall 24…Back wall 25… Storage recess 26...1st contact surface 26a…Contact area 27...Groove 28,128… recessed area 30…Second contact part 31…Second contact surface 32…Groove 33...Movable part 34... Slit 40... Notch 41… Opposite side

Claims

1. A stopper that is attached to the leg of a musical instrument stand and contacts the mounting surface of the musical instrument stand, A first contact portion having a first contact surface that contacts the aforementioned installation surface, The system includes a second contact portion having a second contact surface that contacts the aforementioned installation surface and configured to be retractable relative to the first contact surface, When the first contact surface is not in contact with the installation surface, the second contact portion always protrudes from the first contact surface. When the first contact surface is in contact with the installation surface, the second contact surface is configured to be in contact with the installation surface. Stopper.

2. The first contact portion has a recess that opens to the first contact surface and accommodates the second contact portion. When the first contact surface is in contact with the installation surface, the second contact surface of the second contact portion, which has been retracted into the recess, is configured to contact the installation surface. The stopper according to claim 1.

3. The second contact portion includes a movable part that elastically deforms when it retracts into the recess, The stopper according to claim 2.

4. The first contact surface has two contact regions located on opposite sides of the opening of the recess. The stopper according to claim 2.

5. The second contact portion is made of rubber. A stopper according to any one of claims 1 to 4.

6. The first contact portion, the second contact portion, and the movable portion are integrally formed from rubber. The stopper according to claim 3.

7. The stopper comprises two movable parts that connect two opposing portions on the inner surface of the recess and two portions located on opposite sides of the central portion of the second contact portion. The stopper according to claim 6.

8. The two movable parts extend inclined with respect to both the surface direction of the second contact surface and the direction perpendicular to the surface direction. The stopper according to claim 7.

9. The movable part is plate-shaped, The vertical thickness of the second contact portion is greater than the plate thickness of the movable portion. The stopper according to claim 6.

10. The area of ​​the first contact surface is larger than the area of ​​the second contact surface. The stopper according to claim 1.

11. It is a stand for musical instruments, The stand is equipped with a stopper that is attached to the leg of the instrument stand and contacts the mounting surface of the instrument stand. The stopper is, A first contact portion having a first contact surface that contacts the aforementioned installation surface, The system includes a second contact portion having a second contact surface that contacts the aforementioned installation surface and configured to be retractable relative to the first contact surface, When the first contact surface is not in contact with the installation surface, the second contact portion always protrudes from the first contact surface. When the first contact surface is in contact with the installation surface, the second contact surface is configured to be in contact with the installation surface. Instrument stand.

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