Connection structure and mounting structure

Abstract

To provide a connection structure and an attachment structure to be more easily separated when pulled in one direction than when pulled in the other direction.SOLUTION: A connection structure includes a first device and a second device. The first device includes a first bottom surface, a first adhesion part, and a cylindrical wall surface. The second device includes a second adhesion part and a cylindrical projection part. In the first device and the second device, a first magnetic element and a second magnetic element are mutually attracted to each other by magnetic force so as to allow a first adhesion surface to adhere onto a second adhesion surface. Thus, the devices are connected to be relatively rotatable with a magnetic force direction serving as an axis and also to be removable. The projection part is positioned between the wall surface and the first adhesion part, while having clearances to enable inclination in response to pulling including a direction component vertical to the magnetic force direction. In the first device, the clearance between a top part and the projection part in a first direction is larger than the clearance between the top part and the projection part in a second direction different from the first direction concerning the directions vertical to the magnetic force direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a connection structure and an attachment structure.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2000-189227 (Patent Document 1) discloses a mobile phone holder. In the mobile phone holder, joining means is detached using a magnet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a connection structure, it is desired that the connected devices are not easily detached from each other, while being relatively easily detachable in certain scenarios.

Means for Solving the Problems

[0005] The connection structure according to this disclosure comprises a first device and a second device. The first device comprises a first bottom surface, a first adhesive portion, and a cylindrical wall surface. The first adhesive portion protrudes from the first bottom surface, has a first adhesive surface at its top, and comprises a first magnetic element. The cylindrical wall surface protrudes from the first bottom surface higher than the first adhesive surface so as to surround the top. The second device comprises a second adhesive portion and a cylindrical protrusion. The second adhesive portion constitutes a second adhesive surface and comprises a second magnetic element. The cylindrical protrusion surrounds the second adhesive portion. The first device and the second device are connected so as to be rotatable relative to each other about the direction of the magnetic force, and so as to be detachable, by the first magnetic element and the second magnetic element being attracted to each other by magnetic force, causing the first adhesive surface and the second adhesive surface to adhere. The protrusion is positioned between the wall surface and the first adhesive portion with a clearance that allows it to tilt in response to a tensile force that includes a directional component perpendicular to the direction of the magnetic force. In the first device, the clearance between the top and the convex portion in the first direction, which is perpendicular to the magnetic force direction, is greater than the clearance between the top and the convex portion in the second direction, which is different from the first direction.

[0006] According to the connection structure of this disclosure, in the first device, the clearance between the apex and the convex portion in the first direction perpendicular to the magnetic force direction is greater than the clearance between the apex and the convex portion in the second direction which is different from the first direction. Therefore, the convex portion is tilted more on the first direction side than on the other side. Consequently, the second device is more likely to detach when pulled in the first direction than when pulled in the second direction. This makes it possible to prevent the second device from easily detaching when the user intentionally pulls it in a certain direction, and conversely, to prevent it from easily detaching when the second device is pulled unintentionally in another direction.

[0007] According to the above connection structure, the wall surface may be cylindrical. The protrusion may be annular. The first adhesive portion may have a shape in which a part of the outer surface of the cylinder is missing. This makes it possible to make the tilt angle uniform when tilted towards the second direction, regardless of the relative rotational position of the second device with respect to the first device.

[0008] According to the above connection structure, in a cross-section perpendicular to the magnetic force direction Z, the first adhesive portion may have an arc longer than or equal to the arc of a semicircle. When the first adhesive portion is housed inside the annular cylindrical protrusion, if the arc of the first adhesive portion in the cross-section is smaller than a semicircle, it can move relatively in the left-right direction, causing looseness. On the other hand, when the first adhesive portion has an arc longer than a semicircle, the inner circumferential surface of the protrusion catches on the part of the arc longer than a semicircle. Therefore, looseness in the left-right direction can be suppressed.

[0009] According to the above connection structure, in a cross-section perpendicular to the magnetic force direction, the first bonding portion may comprise a straight portion and arc-shaped portions connected to both ends of the straight portion. The central angle of the arc-shaped portion may be greater than 180°. This further suppresses rattling in the left-right direction.

[0010] According to the above connection structure, the second device may have a second bottom surface. The second adhesive portion may protrude from the second bottom surface. If the second adhesive portion is located further back than the second bottom surface, when attempting to bond the first adhesive portion and the second adhesive portion, the first adhesive portion may get caught on the second bottom surface and may not reach the second adhesive portion. If the second adhesive portion protrudes from the second bottom surface, the first adhesive surface and the second adhesive surface can be bonded more reliably. Therefore, it is possible to prevent the first adhesive surface and the second adhesive surface from unintentionally separating.

[0011] According to the above connection structure, the protrusion may extend from the second bottom surface. The second adhesive portion may protrude such that the second adhesive surface is lower than the protrusion. This makes it possible to suppress magnetic effects, such as objects near the connection structure being attracted to the second adhesive surface.

[0012] According to the above connection structure, when the protrusion tilts, the tilting may be stopped when the protrusion comes into contact with at least one of the first adhesive portion and the wall surface. The tilting angle when the tilting of the protrusion is stopped may be such that the angle when the protrusion tilts in the first direction is greater than the angle when the protrusion tilts in the second direction.

[0013] Because the tilting of the protrusion is stopped, even if the force in the left-right direction is further increased, the second device becomes difficult to detach from the first device. Therefore, it is possible to suppress the second device from unintentionally detaching from the first device. For the second device to detach from the tilted state, a force in the direction of the magnetic force is required. The second device tilts more when tilted in the first direction than when tilted in the second direction. A larger tilt angle means that the distance between the first and second bonding surfaces is greater, so the magnetic force becomes relatively weaker. Therefore, it is easier to remove the second device from the first device when tilted in the first direction than when tilted in the second direction. Note that when the second device is tilted in the second direction, although the magnetic force is relatively strong, the magnetic force is weakened by the tilt. Therefore, with a certain amount of force, the second device can be detached from the first device.

[0014] According to the above connection structure, when the protrusion is tilted and the protrusion is in contact with both the first adhesive portion and the wall surface, the tilt angle when the protrusion is tilted in the first direction may be greater than the angle when the protrusion is tilted in the second direction. This makes it easier to remove the second device from the first device when it is tilted in the first direction than when it is tilted in the second direction.

[0015] According to the above connection structure, when the protrusion is tilted and in contact with the wall surface, the tilt angle when the protrusion is tilted in the first direction may be greater than the angle when the protrusion is tilted in the second direction. This makes it easier to detach the second device from the first device when it is tilted in the first direction than when it is tilted in the second direction.

[0016] According to the above connection structure, the first magnetic element may include a first magnet. The second magnetic element may include a second magnet. A member for suppressing magnetic flux density may be provided on the first bonding surface or between the first bonding surface and the first magnet, or between the second bonding surface and the second magnet.

[0017] Using only magnets with strong magnetic force may result in unintended attraction. On the other hand, using only magnets with weak magnetic force may result in good attraction (ease of attachment) but weak adhesion (resistance to detachment), potentially leading to unintended detachment. Furthermore, using only a yoke member that suppresses magnetic flux density instead of magnets will result in some attraction but weaker suction. By using magnets with a reasonably strong magnetic force and a yoke member, the yoke member can suppress the magnet's attraction force from becoming excessively large, thereby preventing unintended detachment. At the same time, the attraction force from the magnets and yoke member allows the first and second devices to be forcefully attracted to each other when brought close enough.

[0018] The mounting structure according to this disclosure comprises a bedding attachment device and a fitting device, which are attached to bedding. The bedding attachment device comprises a bedding fixing part and a first adhesive part. The bedding fixing part is fixed to the bedding. The first adhesive part comprises a first magnetic element. The fitting device comprises a second adhesive part. The second adhesive part comprises a second magnetic element. The bedding attachment device and the fitting device are bonded together so as to be rotatable relative to each other about the direction of the magnetic force, and so as to be detachable, by the magnetic force between the first and second magnetic elements that bonds the first and second adhesive parts. The bedding attachment device and the fitting device comprises a movement restricting part. The movement restricting part restricts the relative movement between the first and second adhesive parts in a direction perpendicular to the direction of the magnetic force when the first and second adhesive parts are bonded together. The bedding attachment device and the fitting device comprises a rotation restricting part. The rotation restricting unit restricts rotation of the first adhesive part around the opposite side of the bedding fixing part relative to the first adhesive part, rather than rotation around the bedding fixing part, when the first adhesive part and the second adhesive part rotate relative to each other so that they move away in the direction of magnetic force from the state in which they are bonded together.

[0019] According to the mounting structure of this disclosure, rotation around the first adhesive portion is restricted more than rotation around the bedding fixing portion. Therefore, while preventing the second device from being unintentionally pulled away from the bedding and detaching during sleep, the second device can be easily removed when a force is intentionally applied to pull it towards the bedding.

[0020] According to the above attachment structure, the instrument may include a convex portion surrounding the second adhesive portion. The rotation restricting portion may be constituted by a protruding portion provided so as to surround the circumference of the first adhesive portion and the inner circumferential surface of the convex portion.

[0021] According to the above attachment structure, in a cross-section perpendicular to the magnetic force direction, the protruding portion may have a C shape.

[0022] According to the above attachment structure, the instrument may include a convex portion surrounding the second adhesive portion. The rotation restricting portion may be constituted by the outer circumferential surface of the first adhesive portion and the inner circumferential surface of the convex portion.

[0023] According to the above attachment structure, in a cross-section perpendicular to the magnetic force direction, the first adhesive portion may have an arc longer than a semi-circle.

[0024] According to the above attachment structure, in a cross-section perpendicular to the magnetic force direction, the first adhesive portion may include a straight portion and arc-shaped portions connected to both ends of the straight portion. The central angle of the arc-shaped portion may be larger than 180°.

[0025] According to the above attachment structure, when the first adhesive portion and the second adhesive portion relatively rotate so as to separate in the magnetic force direction from the state where the first adhesive portion and the second adhesive portion are adhered, the angle by which the rotation of the instrument is restricted when the instrument rotates around the bedding fixing portion side may be larger than the angle by which the rotation of the instrument is restricted when the instrument rotates around the side opposite to the bedding fixing portion side with respect to the first adhesive portion. Thereby, it is possible to make it easier to remove the second device from the first device when the second device is tilted toward the bedding fixing portion side than when it is tilted toward the side opposite to the bedding fixing portion side.

[0026] According to the above attachment structure, when the rotation restricting portion relatively rotates such that the first adhesive portion and the second adhesive portion move away from each other in the magnetic force direction from the state where the first adhesive portion and the second adhesive portion are adhered, the rotation around the bedding fixing portion side may not be restricted, and the rotation around the side opposite to the bedding fixing portion side with respect to the first adhesive portion may be restricted. Thereby, it is possible to make it easier to remove the second device from the first device than when the second device is tilted to the side opposite to the bedding fixing portion side rather than to the bedding fixing portion side.

Effect of the Invention

[0027] According to the present disclosure, it is possible to provide a connection structure and an attachment structure that are easier to remove when pulled in one direction than when pulled in the other direction.

Brief Description of the Drawings

[0028] [Figure 1] It is an exploded perspective schematic view showing the configuration of the connection structure according to the first embodiment. [Figure 2] It is a first cross-sectional schematic view showing the configuration of the connection structure according to the first embodiment. [Figure 3] It is an enlarged schematic view of region III in FIG. 2. [Figure 4] It is a second cross-sectional schematic view showing the configuration of the connection structure according to the first embodiment. [Figure 5] It is a top schematic view showing the configuration of the first device of the connection structure according to the first embodiment. [Figure 6] It is a cross-sectional schematic view showing the configuration of the first adhesive portion. [Figure 7] It is a schematic view showing a state where the second device is tilted in the first direction. [Figure 8] It is a schematic view showing a state where the second device is tilted in the second direction. [Figure 9] It is a schematic view showing a modification of the state where the second device is tilted in the first direction. [Figure 10] It is a top schematic view showing the configuration of the first device of the connection structure according to the second embodiment. [Figure 11] It is a cross-sectional schematic view showing the configuration of the protruding portion according to the second embodiment. [Figure 12] This is a schematic cross-sectional view showing the configuration of the connection structure according to the second embodiment. [Figure 13] Figure 12 is an enlarged schematic diagram of region XIII. [Figure 14] This is a schematic cross-sectional view showing the configuration of the mounting structure according to the third embodiment. [Modes for carrying out the invention]

[0029] Embodiments of this disclosure will be described in detail with reference to the drawings. Parts identical or corresponding to those shown in the drawings will be denoted by the same reference numerals, and their descriptions will not be repeated. (First Embodiment) First, the configuration of the connection structure 100 according to the first embodiment will be described. [A. Connection Structure] Figure 1 is an exploded perspective schematic diagram showing the configuration of the connection structure 100 according to the first embodiment. As shown in Figure 1, the connection structure 100 according to the first embodiment mainly comprises a first device 1 and a second device 2. The first device 1 mainly comprises a first adhesive portion 10, an annular wall portion 30, and a fastener 5. The first adhesive portion 10 is, for example, shaped in such a way that a part of the outer surface of a cylinder is missing. The annular wall portion 30 is provided so as to surround the first adhesive portion 10. The fastener 5 comprises a first clamping member 3 and a second clamping member 4. The first adhesive portion 10 and the annular wall portion 30 are provided on the first clamping member 3. The second device 2 mainly comprises a cylindrical member 40, a string 7, and a string holding portion 6. The string 7 is attached to the cylindrical member 40. A part of the string holding portion 6 is located in a region surrounded by the inner surface of the cylindrical member 40.

[0030] Figure 2 is a schematic first cross-sectional view showing the configuration of the connection structure 100 according to the first embodiment. As shown in Figure 2, the fastener 5 further comprises a support shaft member 53 and a spring member 54. The spring member 54 is wound around the support shaft member 53. One end of the spring member 54 is attached to the first clamping member 3. The other end of the spring member 54 is attached to the second clamping member 4. The fastener 5 has a fixing portion 73. The fixing portion 73 has a first pressing member 71 and a second pressing member 72. When no external force is applied to the fastener 5, the fastener 5 is biased by the spring member 54 so that the first pressing member 71 and the second pressing member 72 move closer to each other.

[0031] As shown in Figure 2, the first device 1 has a first adhesive portion 10. The first adhesive portion 10 has a first adhesive surface 11 and a first magnetic element 51. The second device 2 has a second adhesive portion 20. The second adhesive portion 20 has a second adhesive surface 21 and a second magnetic element 52. The first magnetic element 51 and the second magnetic element 52 of the first device 1 and the second device 2 are attracted to each other by magnetic force. As a result, the first adhesive surface 11 and the second adhesive surface 21 are bonded together.

[0032] In this specification, the direction parallel to the direction in which the first magnetic element 51 and the second magnetic element 52 are attracted by magnetic force is defined as the magnetic force direction Z. The direction from the first adhesive portion 10 toward the second adhesive portion 20 is defined as the upward direction. Conversely, the direction from the second adhesive portion 20 toward the first adhesive portion 10 is defined as the downward direction. The direction perpendicular to the magnetic force direction Z is defined as the in-plane direction. Among the in-plane directions, the parallel direction parallel to the direction from the first adhesive portion 10 toward the fixing portion 73 is defined as the left-right direction X. The direction perpendicular to both the magnetic force direction Z and the left-right direction X is defined as the front-back direction Y (see Figure 4).

[0033] Each of the first direction 101 and the second direction 102 is perpendicular to the magnetic force direction Z. Each of the first direction 101 and the second direction 102 is a direction relative to the first adhesive portion 10. From another point of view, each of the first direction 101 and the second direction 102 may be a direction extending radially from the first adhesive portion 10. Each of the first direction 101 and the second direction 102 is, for example, parallel to the left-right direction X. The second direction 102 is different from the first direction 101. The second direction 102 is, for example, the opposite direction of the first direction 101. The second direction 102 only needs to be different from the first direction 101, and is not limited to the opposite direction of the first direction 101.

[0034] The first device 1 and the second device 2 are connected so as to be rotatable relative to each other about the magnetic force direction Z as an axis, and are also detachably connected. The second bonding surface 21 is slidable on the first bonding surface 11. The second device 2 is rotatable relative to the first device 1. The axis of rotation of the second device 2 is, for example, perpendicular to the second bonding surface 21. The second bonding surface 21 may be circular. The axis of rotation of the second device 2 passes through, for example, the center of the second bonding surface 21.

[0035] Figure 3 is an enlarged schematic diagram of region III in Figure 2. As shown in Figure 3, the annular wall portion 30 has a first wall surface 31, a second wall surface 32, and a first top surface 33. The first wall surface 31 is cylindrical. The first wall surface 31 may be cylindrical or rectangular. Similarly, the second wall surface 32 is cylindrical. The second wall surface 32 may be cylindrical or rectangular. The second wall surface 32 is located outside the first wall surface 31. The second wall surface 32 surrounds the first wall surface 31. The first top surface 33 is connected to both the first wall surface 31 and the second wall surface 32.

[0036] The first device 1 has a first bottom surface 91 and a first top surface 34. The first bottom surface 91 is connected to a first wall surface 31. The first top surface 34 is connected to a second wall surface 32. In the magnetic force direction Z, the first bottom surface 91 is located below the first top surface 34. From another point of view, in the magnetic force direction Z, the first top surface 34 is located between the first bottom surface 91 and the first top surface 33. In the magnetic force direction Z, the first bottom surface 91 may be located above the first top surface 34.

[0037] As shown in Figure 3, the first adhesive portion 10 protrudes from the first bottom surface 91. The first adhesive portion 10 has a first outer peripheral surface 12 and a top portion 14. The first outer peripheral surface 12 is connected to the first bottom surface 91. The first outer peripheral surface 12 extends upward from the first bottom surface 91. The top portion 14 has a first adhesive surface 11 and a third top surface 16. The third top surface 16 is connected to the first adhesive surface 11. The first adhesive surface 11 is in contact with the second adhesive surface 21. The third top surface 16 may be a portion that is not in contact with the second adhesive surface 21. The first wall surface 31 protrudes from the first bottom surface 91 higher than the first adhesive surface 11. In the magnetic force direction Z, the first top surface 33 is located above the first adhesive surface 11. In the magnetic force direction Z, the first bonding surface 11 is located between the first bottom surface 91 and the first top surface 33.

[0038] As shown in Figures 2 and 3, the first clamping member 3 has a first plate-like member 36 and a second plate-like member 38. Each of the first plate-like member 36 and the second plate-like member 38 is made of, for example, resin. The first plate-like member 36 has a first lower surface 35. The first lower surface 35 is located on the opposite side of the first bottom surface 91 and the first upper surface 34, respectively. The first lower surface 35 is provided with a first recess 37. The first recess 37 is provided on the lower side of the first adhesive surface 11.

[0039] The first magnetic element 51 is composed of, for example, a magnet (first magnet 15). The first magnet 15 is placed in the first recess 37. The second plate-shaped member 38 is located below the first plate-shaped member 36. The first magnet 15 is sandwiched between the first plate-shaped member 36 and the second plate-shaped member 38. A yoke member (not shown) that suppresses magnetic flux density may be provided between the first adhesive surface 11 or between the first adhesive surface 11 and the first magnet 15. The yoke member is made of, for example, iron. The first adhesive surface 11 may be composed of the yoke member. The first adhesive surface 11 may be made of, for example, resin, or it may be made of the first magnet 15.

[0040] As shown in Figure 3, the second magnetic element 52 includes a yoke member 24 and a second magnet 25. The yoke member 24 may be provided on the second bonding surface 21, or it may be provided between the second bonding surface 21 and the second magnet 25. In the magnetic force direction Z, the second magnet 25 is located above the second bonding surface 21. In the magnetic force direction Z, the second magnet 25 is provided between the yoke member 24 and the receiving plate 9. The second bonding surface 21 is made of, for example, the yoke member 24. The second bonding surface 21 may be made of, for example, resin, or it may be made of a magnet.

[0041] The second device 2 has a second bottom surface 92. The second bottom surface 92 is formed by a cylindrical member 40. The second bottom surface 92 may face the top portion 14. The second bottom surface 92 may face the first bottom surface 91. The second adhesive portion 20 has a second outer surface 22. The second outer surface 22 is connected to the second adhesive surface 21. The second outer surface 22 is, for example, cylindrical. In the magnetic force direction Z, the second bottom surface 92 is located above the second adhesive surface 21. The second adhesive portion 20 may protrude from the second bottom surface 92. In the in-plane direction, the second bottom surface 92 is located outside the second adhesive surface 21. The second adhesive portion 20 does not have to protrude from the second bottom surface 92.

[0042] The cylindrical member 40 has a main body portion 48 and a protrusion portion 49. The protrusion portion 49 is connected to the main body portion 48. The protrusion portion 49 is cylindrical. The protrusion portion 49 may be an annular cylindrical shape or an annular cylindrical shape. Similarly, the main body portion 48 is cylindrical. The main body portion 48 may be an annular cylindrical shape or an annular cylindrical shape. The main body portion 48 and the protrusion portion 49 may be formed integrally. The protrusion portion 49 is provided on the lower side of the main body portion 48. The protrusion portion 49 may protrude from the second bottom surface 92.

[0043] The cylindrical member 40 has a second inner circumferential surface 41, a second outer circumferential surface 42, and a second lower surface 43. The second outer circumferential surface 42 is located outside the second inner circumferential surface 41. Each of the second inner circumferential surface 41 and the second outer circumferential surface 42 is connected to the second lower surface 43. The second inner circumferential surface 41 is provided with a second recess 46. Part of the yoke member 24 and part of the coil support plate 9 may be inserted into the second recess 46. Each of the yoke member 24 and the coil support plate 9 may be in contact with the protrusion 49.

[0044] The second inner circumferential surface 41 has a first inner circumferential surface portion 44, a second inner circumferential surface portion 45, and a third inner circumferential surface portion 47. The first inner circumferential surface portion 44 is connected to the second lower surface 43. The first inner circumferential surface portion 44 faces the first outer circumferential surface 12. As shown in Figure 3, the first inner circumferential surface portion 44 may be inclined with respect to the magnetic force direction Z such that the distance in the left-right direction X increases as it moves downward. In the magnetic force direction Z, the second inner circumferential surface portion 45 is located above the first inner circumferential surface portion 44. The second inner circumferential surface portion 45 extends along the magnetic force direction Z. The second inner circumferential surface portion 45 is in contact with the second outer surface 22 of the yoke member 24.

[0045] In the magnetic force direction Z, the third inner circumferential surface portion 47 is located above the second inner circumferential surface portion 45. In the magnetic force direction Z, the second recess 46 is located between the second inner circumferential surface portion 45 and the third inner circumferential surface portion 47. The second lower surface 43, a part of the second inner circumferential surface 41, and a part of the second outer circumferential surface 42 are formed by a convex portion 49. The convex portion 49 surrounds the second adhesive portion 20. The second adhesive portion 20 protrudes such that the second adhesive surface 21 is lower than the convex portion 49. In the magnetic force direction Z, the second adhesive surface 21 is located above the second lower surface 43 of the convex portion 49.

[0046] As shown in Figure 3, the protrusion 49 is positioned between the first wall surface 31 and the first adhesive portion 10 with a clearance that allows it to tilt in response to a tensile force including a component perpendicular to the magnetic force direction Z. In the left-right direction X, a gap is provided between the protrusion 49 and the first wall surface 31. In the left-right direction X, a gap is provided between the protrusion 49 and the first outer peripheral surface 12 of the first adhesive portion 10.

[0047] As shown in Figure 3, the clearance between the top 14 and the protrusion 49 of the first adhesive portion 10 in the first direction 101 (first clearance C1) is greater than the clearance between the top 14 and the protrusion 49 of the first adhesive portion 10 in the second direction 102 (second clearance C2). The first clearance C1 may be the distance between the boundary between the top 14 and the first outer peripheral surface 12 and the boundary between the second lower surface 43 and the second inner peripheral surface 41 in the first direction 101. The second clearance C2 may be the distance between the boundary between the top 14 and the first outer peripheral surface 12 and the boundary between the second lower surface 43 and the second inner peripheral surface 41 in the second direction 102.

[0048] In the above description, an example was given in which a gap is provided between the protrusion 49 and the first outer peripheral surface 12 of the first adhesive portion 10, but this disclosure is not limited to the above configuration. In the modified connection structure, a gap does not need to be provided between the protrusion 49 and the first outer peripheral surface 12 of the first adhesive portion 10.

[0049] Figure 4 is a schematic second cross-sectional view showing the configuration of the connection structure 100 according to the first embodiment. The cross-section shown in Figure 4 is parallel to the magnetic force direction Z and the front-rear direction Y. The cross-section shown in Figure 4 is perpendicular to the cross-section shown in Figure 2.

[0050] As shown in Figure 4, the second device 2 includes a coil spring 8 and a receiving plate 9. The coil spring 8 is provided on the receiving plate 9. The coil spring 8 is provided in a coil spring arrangement hole 6a formed in the string holding portion 6. The string holding portion 6 is biased upward by the coil spring 8. The receiving plate 9 is positioned in the region surrounded by the second inner circumferential surface 41 of the cylindrical member 40. The string holding portion 6 is provided with a pair of third recesses 6b. The pair of third recesses 6b are provided on both sides of the coil spring arrangement hole 6a. The string 7 is positioned in the pair of third recesses 6b. The second inner circumferential surface 41 of the cylindrical member 40 covers each of the pair of third recesses 6b. [B. 1st device] Figure 5 is a schematic top view showing the configuration of the first device 1 of the connection structure 100 according to the first embodiment. As shown in Figure 5, when viewed in the magnetic force direction Z, the first wall surface 31 of the annular wall portion 30 surrounds the top portion 14 of the first adhesive portion 10. Along the entire circumference of the first wall surface 31, the first wall surface 31 is spaced apart from the first outer peripheral surface 12 of the first adhesive portion 10. The clearance between the first wall surface 31 and the first outer peripheral surface 12 in the first direction 101 (third clearance C3) is greater than the clearance between the first wall surface 31 and the first outer peripheral surface 12 in the second direction 102 (fourth clearance C4).

[0051] Figure 6 is a schematic cross-sectional view showing the structure of the first adhesive portion 10. The cross-section shown in Figure 6 is perpendicular to the magnetic force direction Z. As shown in Figure 6, the first outer peripheral surface 12 of the first adhesive portion 10 has, for example, a first arc-shaped portion 27 and a first straight portion 13. The first arc-shaped portion 27 is connected to both ends of the first straight portion 13. In a cross-section perpendicular to the magnetic force direction Z, the first outer peripheral surface 12 of the first adhesive portion 10 has a general D shape. The direction in which the first straight portion 13 extends may be perpendicular to the first direction 101. From another point of view, the first straight portion 13 may extend along the front-rear direction Y.

[0052] As shown in Figure 6, in a cross-section perpendicular to the magnetic force direction Z, the first adhesive portion 10 may have an arc longer than a semicircle. Specifically, the arc-shaped portion 27 has an arc longer than a semicircle. From another point of view, the central angle θ3 of the first arc-shaped portion 27 is greater than 180°. The lower limit of the central angle θ3 of the first arc-shaped portion 27 is not particularly limited, but may be, for example, 200° or more, or 220° or more. The upper limit of the central angle θ3 is not particularly limited, but may be, for example, 320° or less, or 300° or less. [C: Leaning state] Figure 7 is a schematic diagram showing the state in which the second device 2 is tilted in the first direction 101. When the user pulls the string 7 in the first direction 101, the second device 2 tilts toward the first direction 101 relative to the first device 1. As shown in Figure 7, when the protrusion 49 of the second device 2 is tilted toward the first direction 101, the protrusion 49 comes into contact with the first wall surface 31. The tilt angle when the protrusion 49 comes into contact with the first wall surface 31 toward the first direction 101 is called the first angle θ1. The first angle θ1 is the angle made between the first wall surface 31 and the second outer peripheral surface 42 when the protrusion 49 comes into contact with the first wall surface 31 toward the first direction 101.

[0053] When the protrusion 49 contacts the first wall surface 31, the protrusion 49 may be separated from the first adhesive portion 10. After the protrusion 49 has contacted the first wall surface 31, if the user pulls the string 7 further toward the first direction 101, the protrusion 49 rotates toward the first direction 101, using the contact point between the first wall surface 31 and the protrusion 49 as a pivot point. As a result, the second device 2 is removed from the first device 1.

[0054] Figure 8 is a schematic diagram showing the state in which the second device 2 tilts in the second direction 102. When the user pulls the string 7 in the second direction 102, the second device 2 tilts toward the second direction 102 relative to the first device 1. As shown in Figure 8, when the protrusion 49 of the second device 2 tilts toward the second direction 102, the protrusion 49 comes into contact with the first wall surface 31. The tilt angle when the protrusion 49 comes into contact with the first wall surface 31 toward the second direction 102 is the second angle θ2. The second angle θ2 is the angle made between the first wall surface 31 and the second outer surface 42 when the protrusion 49 comes into contact with the first wall surface 31 toward the second direction 102.

[0055] As shown in Figure 8, when the protrusion 49 contacts the first wall surface 31, the protrusion 49 may also be in contact with the first adhesive portion 10. In other words, when the protrusion 49 tilts toward the second direction 102, the protrusion 49 may be in contact with both the first wall surface 31 and the first adhesive portion 10. After the protrusion 49 has contacted the first wall surface 31, if the user pulls the string 7 further toward the second direction 102, the protrusion 49 rotates toward the second direction 102, using the contact point between the first wall surface 31 and the protrusion 49 as a pivot point. As a result, the second device 2 is removed from the first device 1.

[0056] As shown in Figures 7 and 8, when the protrusion 49 is tilted and in contact with the first wall surface 31, the tilt angle when the protrusion 49 is tilted in the first direction 101 (first angle θ1) may be greater than the angle when the protrusion 49 is tilted in the second direction 102 (second angle θ2).

[0057] Figure 9 is a schematic diagram showing a modified example in which the second device 2 is tilted in the first direction 101. As shown in Figure 9, when the protrusion 49 is in contact with the first wall surface 31, the protrusion 49 may also be in contact with the first adhesive portion 10. In other words, when the protrusion 49 is tilted toward the first direction 101, the protrusion 49 may be in contact with both the first wall surface 31 and the first adhesive portion 10. The second outer peripheral surface 42 of the protrusion 49 is in contact with the first wall surface 31. The first inner peripheral surface portion 44 of the protrusion 49 is in contact with the first outer peripheral surface 12 of the first adhesive portion 10.

[0058] As shown in Figures 8 and 9, when the protrusion 49 is tilted and in contact with both the first adhesive portion 10 and the first wall surface 31, the tilt angle when the protrusion 49 is tilted in the first direction 101 (first angle θ1) may be greater than the angle when the protrusion 49 is tilted in the second direction 102 (second angle θ2).

[0059] When the protrusion 49 tilts, the tilting may be stopped when the protrusion 49 comes into contact with at least one of the first adhesive portion 10 and the first wall surface 31. From another point of view, the tilting of the protrusion 49 may be stopped when it comes into contact with the first adhesive portion 10, or when it comes into contact with the first wall surface 31, or when it comes into contact with both the first adhesive portion 10 and the first wall surface 31. The tilting angle when the tilting of the protrusion 49 is stopped may be such that the angle when the protrusion 49 tilts in the first direction 101 (first angle θ1) is greater than the angle when the protrusion 49 tilts in the second direction 102 (second angle θ2). When the tilting of the protrusion 49 is stopped, the distance between the first magnetic element 51 and the second magnetic element 52 increases. Therefore, when pulling the second device 2 upwards to remove it, the force required to remove it can be reduced. (Second Embodiment) Next, the configuration of the connection structure 100 according to the second embodiment will be described. The connection structure 100 according to the second embodiment differs from the connection structure 100 according to the first embodiment mainly in that it has a C-shaped protruding portion 70, while the other configurations are the same as those of the connection structure 100 according to the second embodiment. The following description will focus on the configurations that differ from the connection structure 100 according to the first embodiment.

[0060] Figure 10 is a schematic top view showing the configuration of the first device 1 of the connection structure 100 according to the second embodiment. As shown in Figure 10, the first device 1 has a substantially C-shaped protruding portion 70 when viewed in the magnetic force direction Z. The protruding portion 70 is curved so as to be convex toward the second direction 102. The protruding portion 70 is open toward the first direction 101. Figure 11 is a schematic cross-sectional view showing the configuration of the protruding portion 70 according to the second embodiment. The cross-section shown in Figure 11 is a cross-section perpendicular to the magnetic force direction Z.

[0061] As shown in Figure 11, the protruding portion 70 has a second arc-shaped portion 26, a third arc-shaped portion 17, and a pair of connecting portions 18. One end of each of the pair of connecting portions 18 is connected to the second arc-shaped portion 26, and the other end is connected to the third arc-shaped portion 17. The second arc-shaped portion 26 is located on the second direction 102 side than the third arc-shaped portion 17. The radius of curvature of the third arc-shaped portion 17 is smaller than the radius of curvature of the second arc-shaped portion 26. The center of curvature of the third arc-shaped portion 17 may coincide with the center of curvature of the second arc-shaped portion 26. The central angles of the second arc-shaped portion 26 and the third arc-shaped portion 17 are, for example, 180°. The central angles of the second arc-shaped portion 26 and the third arc-shaped portion 17 may be, for example, 150° or more and 210° or less.

[0062] Figure 12 is a schematic cross-sectional view showing the configuration of the connection structure 100 according to the second embodiment. The cross-section shown in Figure 12 is parallel to the magnetic force direction Z and the left-right direction X. Figure 13 is an enlarged schematic view of region XIII in Figure 12.

[0063] As shown in Figure 13, in the magnetic force direction Z, the first adhesive surface 11 may be at the same height as the first bottom surface 91. In the magnetic force direction Z, the second adhesive surface 21 may be located below the second bottom surface 43 of the cylindrical member 40. In the left-right direction X, the protruding portion 70 is located on the second direction 102 side of the second outer surface 22 of the second adhesive portion 20.

[0064] When the second device 2 is pulled in the second direction 102, the protruding portion 70 may contact the second inner circumferential surface 41 of the convex portion 49 on the second direction 102 side. From another point of view, when the convex portion 49 tilts toward the second direction 102 side, the rotation of the convex portion 49 may be restricted by the protruding portion 70. Conversely, when the convex portion 49 tilts toward the first direction 101 side, the rotation of the convex portion 49 may not be restricted by the protruding portion 70. When the second device 2 rotates away from the first device 1, the rotation of the second device 2 about the second direction 102 side may be restricted more than the rotation of the second device 2 about the first direction 101 side. (Third embodiment) Next, the configuration of the mounting structure according to the third embodiment will be described. Figure 14 is a schematic cross-sectional view showing the configuration of the mounting structure according to the third embodiment.

[0065] The mounting structure 100 according to the third embodiment includes a bedding attachment 1 and a device 2. The mounting structure 100 according to the third embodiment corresponds to the connection structure 100 according to the first and second embodiments. The bedding attachment 1 is attached to the bedding 61. The bedding attachment 1 corresponds to the first device 1 of the connection structure 100 according to the first and second embodiments. As shown in Figure 14, the bedding attachment 1 includes a bedding fixing part 73, a first adhesive part 10, a fastener 5, and an annular wall part 30. The bedding fixing part 73 is fixed to the bedding 61. The bedding 61 is, for example, a pillow, but is not limited to a pillow. The bedding 61 may be, for example, a comforter, mattress, blanket, bed, or sheets.

[0066] The bedding fixing section 73 is composed of a first pressing member 71 and a second pressing member 72. The left end of the first clamping member 3 constitutes the first pressing member 71. The left end of the second clamping member 4 constitutes the second pressing member 72. When the user grasps the right end of the first clamping member 3 and the right end of the second clamping member 4, each of the first clamping member 3 and the second clamping member 4 rotates around the pivot shaft member 53. This increases the distance between the first pressing member 71 and the second pressing member 72. The bedding 61 is placed between the first pressing member 71 and the second pressing member 72. The bedding 61 is clamped by the first pressing member 71 and the second pressing member 72. As a result, the bedding fixing section 73 is fixed to the bedding 61. The bedding fixing section 73 is located, for example, on the first direction 101 side when viewed from the first adhesive section 10. The bedding fixing portion 73 is not located on the extension of the magnetic force direction Z.

[0067] Device 2 corresponds to the second device 2 of the connection structure 100 according to the first and second embodiments. Device 2 is, for example, a strap. Device 2 may also be a game machine 62 having a strap. Device 2 mainly comprises a second adhesive part 20, a cylindrical member 40, a string holding part 6, a coil spring 8, a receiving plate 9, and a string 7. The bedding attachment device 1 and device 2 are bonded together so that the first adhesive part 10 and the second adhesive part 20 are bonded by the magnetic force of the first magnetic element 51 and the second magnetic element 52, so that they can rotate relative to each other around the magnetic force direction Z and can be attached and detached.

[0068] As shown in Figures 3 and 13, the bedding attachment 1 and the device 2 have a movement restricting portion 81. The movement restricting portion 81 restricts the relative movement of the first adhesive portion 10 and the second adhesive portion 20 in a direction perpendicular to the magnetic force direction Z when the first adhesive portion 10 and the second adhesive portion 20 are in contact. The movement restricting portion 81 is composed of, for example, a first outer peripheral surface 12 and a second inner peripheral surface 41 (see Figure 3). The first outer peripheral surface 12 is composed of a first straight portion 13 and an arc (first circular arc-shaped portion 27) with a length greater than or equal to the arc of a semicircle (see Figure 6). The rattle of the device 2 in the left-right direction X is suppressed by the first outer peripheral surface 12. In addition to the above configuration, or instead of the above configuration, the movement restricting portion 81 may be composed of a combination of the first wall surface 31 of the annular wall portion 30 and the second outer peripheral surface 42 of the convex portion 49.

[0069] As shown in Figure 3, the bedding attachment device 1 and the device 2 have a rotation restricting portion 82. The rotation restricting portion 82 restricts rotation of the first adhesive portion 10 around the opposite side of the bedding fixing portion 73 relative to the first adhesive portion 10, rather than rotation around the bedding fixing portion 73 side, when the first adhesive portion 10 and the second adhesive portion 20 rotate relative to each other so that they move away in the magnetic force direction Z from the state in which the first adhesive portion 10 and the second adhesive portion 20 are bonded together. As shown in Figure 3, the rotation restricting portion 82 may be composed of the first outer peripheral surface 12 of the first adhesive portion 10 and the second inner peripheral surface 41 of the protrusion 49.

[0070] When the first adhesive portion 10 and the second adhesive portion 20 rotate relative to each other so that they move away in the magnetic force direction Z from the state in which they are bonded, the rotation restricting portion 82 may not restrict rotation about the bedding fixing portion 73 side, but may restrict rotation of the first adhesive portion 10 about the side opposite to the bedding fixing portion 73 side. As shown in Figures 7 and 8, when the second adhesive portion 20 rotates toward the bedding fixing portion 73 side, the second inner circumferential surface 41 of the protrusion 49 does not contact the first outer circumferential surface 12 of the first adhesive portion 10, and when the second adhesive portion 20 rotates toward the side opposite to the bedding fixing portion 73 side, the second inner circumferential surface 41 of the protrusion 49 may contact the first outer circumferential surface 12 of the first adhesive portion 10.

[0071] As shown in Figure 13, the rotation restricting portion 82 may be composed of a protruding portion 70 and a second inner circumferential surface 41 of the convex portion 49. When the second adhesive portion 20 rotates toward the bedding fixing portion 73, the second inner circumferential surface 41 of the convex portion 49 on the bedding fixing portion 73 side does not contact the protruding portion 70, and when the second adhesive portion 20 rotates toward the opposite side of the bedding fixing portion 73, the second inner circumferential surface 41 of the convex portion 49 on the opposite side of the bedding fixing portion 73 side may contact the protruding portion 70 (see Figure 13).

[0072] When the first adhesive portion 10 and the second adhesive portion 20 rotate relative to each other so that they move apart in the magnetic force direction Z from a state in which they are bonded, the angle at which the rotation of the device 2 is restricted when the device 2 rotates around the bedding fixing portion 73 side may be greater than the angle at which the rotation of the device 2 is restricted when the device 2 rotates around the opposite side of the first adhesive portion 10 from the bedding fixing portion 73 side. From another point of view, the angle at which the rotation of the device 2 is restricted when the device 2 rotates toward the bedding fixing portion 73 side (first angle θ1) may be greater than the angle at which the rotation of the device 2 is restricted when the device 2 rotates toward the opposite side of the bedding fixing portion 73 side (second angle θ2) (see Figures 8 and 9).

[0073] In the above description, the bedding attachment device 1 was explained as an example of the first device 1, but the first device 1 is not limited to the bedding attachment device 1. The first device 1 may be attached to something other than bedding 61. For example, the first device 1 may be attached to clothing such as a shirt, or to furniture such as a desk.

[0074] The rotation restricting section 82 is not limited to a configuration in which the wall surface contacts the wall surface earlier when it rotates to one side than when it rotates to the other side, as described above. The rotation restricting section 82 may be configured such that, for example, more force is required when it rotates to one side than when it rotates to the other side. To adjust the force restricting rotation, for example, a cushioning material may be used. Alternatively, another magnet may be provided so that a greater attractive force acts when it rotates to one side than when it rotates to the other side.

[0075] The game console 62 has, for example, a memory unit (not shown), a processor (not shown), and / or a display (not shown). The memory unit is, for example, DRAM (Dynamic Random Access Memory). The memory unit may store, for example, an application program such as a game. The processor may be capable of reading the application program and performing information processing. The display may, for example, display an image generated as a result of the information processing performed by the processor.

[0076] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0077] 1 First device (bedding attachment device), 2 Second device (device), 3 First clamping member, 4 Second clamping member, 5 Fastener, 6 String holding part, 6a Coil spring placement hole, 6b Third recess, 7 String, 8 Coil spring, 9 Plate, 10 First adhesive part, 11 First adhesive surface, 12 First outer surface, 13 Straight part (First straight part), 14 Top part, 15 First magnet, 16 Third upper surface, 17 Third arc-shaped part, 18 Connecting part, 20 Second adhesive part, 21 Second adhesive surface, 22 Second outer surface, 24 Yoke member (member), 25 Second magnet, 26 Second arc-shaped part, 27 Arc-shaped part (First arc-shaped part), 30 Annular wall part, 31 Wall surface (First wall surface), 32 Second wall surface, 33 First top surface, 34 First upper surface, 35 1st bottom surface, 36 1st plate-shaped member, 37 1st recess, 38 2nd plate-shaped member, 40 tubular member, 41 2nd inner circumferential surface, 42 2nd outer circumferential surface, 43 2nd bottom surface, 44 1st inner circumferential surface portion, 45 2nd inner circumferential surface portion, 46 2nd recess, 47 3rd inner circumferential surface portion, 48 main body portion, 49 convex portion, 51 1st magnetic element, 52 2nd magnetic element, 53 support shaft member, 54 spring member, 61 bedding, 62 game machine, 70 protruding portion, 71 1st retaining member, 72 2nd retaining member, 73 bedding fixing portion, 81 movement restricting portion, 82 rotation restricting portion, 91 1st bottom surface, 92 2nd bottom surface, 100 connection structure (mounting structure), 101 1st direction, 102 2nd direction, C1 1st clearance, C2 2nd clearance, C3 3rd clearance, C4 Fourth clearance, X: left-right direction, Y: front-back direction, Z: magnetic force direction.

Claims

1. A connection structure comprising a first device and a second device, The first apparatus is The first base and, A first adhesive portion having a first wall surface protruding from the first bottom surface, a first adhesive surface at the top, and a first magnetic element, It comprises a cylindrical second wall surface that protrudes from the first bottom surface higher than the first adhesive surface so as to surround the top portion and faces the first wall surface, The second device is A second adhesive portion comprising a second adhesive surface and a second magnetic element, It comprises a cylindrical protrusion surrounding the second adhesive portion, The first device and the second device are connected so as to be rotatable relative to each other about the direction of the magnetic force, and so as to be detachable, by the first magnetic element and the second magnetic element being attracted to each other by magnetic force, thereby bonding the first adhesive surface and the second adhesive surface together. The protrusion is positioned between the first wall surface and the second wall surface with a clearance that allows it to tilt in response to a tensile force that includes a component perpendicular to the magnetic force direction. A connection structure in the first device wherein the clearance between the first wall surface and the protrusion in a first direction perpendicular to the magnetic force direction is greater than the clearance between the first wall surface and the protrusion in a second direction different from the first direction.

2. The second wall surface is cylindrical, The aforementioned protrusion is an annular cylindrical shape, The connection structure according to claim 1, wherein the first wall surface has a shape in which a part of the outer surface of the cylinder is missing.

3. The connection structure according to claim 2, wherein in a cross-section perpendicular to the magnetic force direction, the first wall surface has an arc with a length equal to or greater than the arc of a semicircle.

4. In a cross-section perpendicular to the magnetic force direction, the first wall surface comprises a straight portion and arc-shaped portions connected to both ends of the straight portion. The connection structure according to claim 2 or claim 3, wherein the central angle of the arc-shaped portion is greater than 180°.

5. The second device is equipped with a second bottom surface, The connection structure according to any one of claims 1 to 4, wherein the second adhesive portion protrudes from the second bottom surface.

6. The aforementioned protrusion extends from the second bottom surface, The connection structure according to claim 5, wherein the second adhesive portion protrudes such that the second adhesive surface is lower than the convex portion.

7. When the protrusion tilts, the tilting is stopped when the protrusion comes into contact with at least one of the first wall surface and the second wall surface. The connection structure according to any one of claims 1 to 6, wherein the tilt angle when the tilting of the protrusion is stopped is such that the angle when the protrusion is tilted in the first direction is greater than the angle when the protrusion is tilted in the second direction.

8. The connection structure according to any one of claims 1 to 6, wherein when the protrusion is tilted and the protrusion is in contact with both the first wall surface and the second wall surface, the angle of tilt when the protrusion is tilted in the first direction is greater than the angle when the protrusion is tilted in the second direction.

9. The connection structure according to any one of claims 1 to 6, wherein when the protrusion is tilted and the protrusion is in contact with the second wall surface, the angle of tilt when the protrusion is tilted in the first direction is greater than the angle when the protrusion is tilted in the second direction.

10. The first magnetic element comprises a first magnet, The second magnetic element comprises a second magnet, The connection structure according to any one of claims 1 to 9, wherein a member for suppressing magnetic flux density is provided on the first adhesive surface or between the first adhesive surface and the first magnet, or between the second adhesive surface and the second magnet.

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