Connection structure and attachment 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 connection and mounting structures. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 2000-189227 (Patent Document 1) discloses a mobile phone holder in which a joining means is attached and detached using a magnet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-189227 Summary of the Invention [Problem to be solved by the invention]

[0004] In a connection structure, it is desirable that the connected devices are not easily detached from each other, but that they be relatively easily detached in some situations. [Means for solving the problem]

[0005] The connection structure according to the present disclosure includes a first device and a second device. The first device includes 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 is provided with a first magnetic element. The cylindrical wall surface protrudes from the first bottom surface higher than the first adhesive surface, surrounding the top. The second device includes a second adhesive portion and a cylindrical protrusion. The second adhesive portion forms the second adhesive surface and is provided with a second magnetic element. The cylindrical protrusion surrounds the second adhesive portion. The first device and the second device are detachably connected to each other and are rotatable relative to each other around the axis of the magnetic force. The protrusion is located between the wall surface and the first adhesive portion with a clearance that allows it to tilt in response to tension including a directional component perpendicular to the magnetic force direction. In the first device, the clearance between the top and the protrusion in a first direction perpendicular to the direction of magnetic force is larger than the clearance between the top and the protrusion in a second direction different from the first direction.

[0006] According to the connection structure of the present disclosure, in the first device, the clearance between the apex and the convex portion in a first direction perpendicular to the magnetic force direction is greater than the clearance between the apex and the convex portion in a second direction different from the first direction. Therefore, the convex portion tilts more toward the first direction than toward the other direction. Therefore, the second device is more easily removed when pulled toward the first direction than when pulled toward the second direction. This makes it possible to prevent the second device from being easily removed when the user intentionally pulls it in one direction, and conversely, to prevent the second device from being easily removed when unintentionally pulled in another direction.

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

[0008] According to the above connection structure, the first adhesive portion may have an arc longer than a semicircle in a cross section perpendicular to the magnetic force direction Z. When the first adhesive portion is fitted inside the annular cylindrical convex portion, if the arc of the first adhesive portion in the cross section is smaller than a semicircle, the first adhesive portion can move relatively in the left-right direction, causing rattle. On the other hand, when the first adhesive portion has an arc longer than a semicircle, the inner circumferential surface of the convex portion catches on the arc longer than a semicircle. This makes it possible to suppress rattle in the left-right direction.

[0009] According to the above connection structure, in a cross section perpendicular to the magnetic force direction, the first adhesive portion may have 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 can further suppress wobble in the left-right direction.

[0010] According to the above-described 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 deeper 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 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 more reliably bonded. Therefore, it is possible to prevent the first adhesive surface and the second adhesive surface from unintentionally separating from each other.

[0011] According to the above-described connection structure, the convex portion may protrude from the second bottom surface. The second adhesive portion may protrude such that the second adhesive surface is lower than the convex portion. This can suppress magnetic influences, such as objects near the connection structure being attracted to the second adhesive surface.

[0012] According to the connection structure, when the protrusion tilts, the tilt may be stopped by contacting at least one of the first adhesive portion and the wall surface. With regard to the tilt angle at which the protrusion stops tilting, the angle when the protrusion tilts in the first direction may be larger than the angle when the protrusion tilts in the second direction.

[0013] Because the tilting of the protrusion is stopped, the second device is difficult to remove from the first device even if the force in the left-right direction is further increased. Therefore, unintentional detachment of the second device from the first device can be prevented. To detach the second device from a 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. The larger the tilt angle, the greater the distance between the first and second adhesive surfaces, resulting in a relatively weaker magnetic force. Therefore, the second device is easier to remove from the first device when tilted in the first direction than when tilted in the second direction. Note that when tilting the second device in the second direction, although the magnetic force is relatively strong, it is weakened by the tilt. Therefore, the second device can be detached from the first device by applying a certain amount of force.

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

[0015] According to the above connection structure, when the convex portion is tilted and contacts the wall surface, the angle of tilt when the convex portion is tilted in the first direction may be larger than the angle of tilt when the convex portion is tilted in the second direction. This makes it easier to remove the second device from the first device when the second device is tilted in the first direction than when the second device 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 adhesive surface or between the first adhesive surface and the first magnet, or between the second adhesive surface and the second magnet.

[0017] If only magnets with strong magnetic force are used, there is a risk of unintended adhesion. On the other hand, if only magnets with weak magnetic force are used, although there is an attractive force (easy to attach), the attractive force (difficulty to remove) will be weak, and there is a risk of unintended detachment. Furthermore, if only a yoke member that suppresses magnetic flux density is used instead of a magnet, there will be an attractive force, but it will be weak. Therefore, by using a magnet and yoke member with a relatively strong magnetic force, the yoke member prevents the attractive force of the magnet from becoming excessively large, thereby suppressing unintended detachment, and the attractive force of the magnet and yoke member allows the first device and second device to be attracted together vigorously when brought close to each other to a certain extent.

[0018] The attachment structure according to the present disclosure comprises a bedding attachment to bedding and an appliance. The bedding attachment comprises a bedding fixing portion and a first adhesive portion. The bedding fixing portion is fixed to the bedding. The first adhesive portion comprises a first magnetic element. The appliance comprises a second adhesive portion. The second adhesive portion comprises a second magnetic element. The bedding attachment and the appliance are attached so as to be relatively rotatable about the axis of the magnetic force and so as to be detachable, as the first adhesive portion and the second adhesive portion are attached by the magnetic force between the first magnetic element and the second magnetic element. The bedding attachment and the appliance are attached so as to be relatively rotatable about the axis of the magnetic force. The bedding attachment and the appliance are equipped with a movement restricting portion. The movement restricting portion restricts relative movement between the first adhesive portion and the second adhesive portion in a direction perpendicular to the magnetic force direction when the first adhesive portion and the second adhesive portion are attached. The bedding attachment and the appliance are equipped with a rotation restricting portion. When the first adhesive portion and the second adhesive portion rotate relative to each other so as to move away from each other in the direction of magnetic force from a state in which the first adhesive portion and the second adhesive portion are adhered, the rotation restricting portion restricts rotation around the side opposite to the bedding fixing portion side relative to the first adhesive portion, rather than rotation around the bedding fixing portion side.

[0019] The attachment structure according to the present disclosure restricts rotation about the side opposite to the bedding fastening part relative to the first adhesive part, rather than rotation about the bedding fastening part, thereby preventing the second device from being unintentionally pulled away from the bedding and becoming detached during sleep, etc., and allowing the second device to be easily removed when a pulling force is intentionally applied toward the bedding.

[0020] According to the above-described attachment structure, the device may include a convex portion surrounding the second adhesive portion, and the rotation restricting portion may be configured by a protruding portion provided so as to surround the periphery of the first adhesive portion and an inner peripheral surface of the convex portion.

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

[0022] According to the above-described attachment structure, the appliance may include a protrusion surrounding the second adhesive portion. The rotation restricting portion may be configured by an outer peripheral surface of the first adhesive portion and an inner peripheral surface of the protrusion.

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

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

[0025] According to the above-described attachment structure, when the first adhesive portion and the second adhesive portion rotate relative to each other so as to move away from each other in the magnetic force direction from a state in which the first adhesive portion and the second adhesive portion are adhered to each other, the angle at which the rotation of the device is restricted when the device rotates about the bed fixing part side may be larger than the angle at which the rotation of the device is restricted when the device rotates about the side opposite the bed fixing part side with respect to the first adhesive portion. This makes it easier to remove the second device from the first device by tilting the second device toward the bed fixing part side than by tilting it away from the bed fixing part side.

[0026] According to the above-described attachment structure, when the first adhesive portion and the second adhesive portion rotate relatively away from each other in the magnetic force direction from a state in which the first adhesive portion and the second adhesive portion are adhered to each other, the rotation restricting portion may not restrict rotation about the bed fixing portion side, but may restrict rotation about the side opposite to the bed fixing portion side with respect to the first adhesive portion. This makes it easier to remove the second device from the first device by tilting the second device toward the bed fixing portion side than by tilting it away from the bed fixing portion side. [Effects of the Invention]

[0027] According to the present disclosure, it is possible to provide a connection structure and an attachment structure that are more likely to come off when pulled in one direction than when pulled in the other direction. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is an exploded perspective view showing the configuration of a connection structure according to a first embodiment. [Figure 2] 1 is a first schematic cross-sectional view showing the configuration of a connection structure according to a first embodiment. [Figure 3] FIG. 3 is an enlarged schematic view of region III in FIG. 2. [Figure 4] FIG. 4 is a second schematic cross-sectional view showing the configuration of the connection structure according to the first embodiment. [Figure 5] 3 is a schematic top view showing the configuration of a first device of the connection structure according to the first embodiment. FIG. [Figure 6] FIG. 3 is a cross-sectional view showing a configuration of a first adhesive portion. [Figure 7] 10 is a schematic diagram showing a state in which the second device is tilted in a first direction. FIG. [Figure 8] FIG. 10 is a schematic diagram showing a state in which the second device is tilted in a second direction. [Figure 9] 10A and 10B are schematic diagrams showing modified examples of the state in which the second device is tilted in the first direction. [Figure 10] FIG. 10 is a schematic top view showing the configuration of a first device of the connection structure according to the second embodiment. [Figure 11] FIG. 10 is a cross-sectional view schematically illustrating the configuration of a protruding portion according to a second embodiment. [Figure 12] FIG. 6 is a cross-sectional view illustrating a configuration of a connection structure according to a second embodiment. [Figure 13] FIG. 13 is an enlarged schematic view of region XIII in FIG. 12. [Figure 14] FIG. 10 is a cross-sectional view showing the configuration of the mounting structure according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and the description thereof 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] FIG. 1 is an exploded perspective view showing the configuration of a connection structure 100 according to a first embodiment. As shown in FIG. 1, the connection structure 100 according to the first embodiment mainly includes a first device 1 and a second device 2. The first device 1 mainly includes a first adhesive portion 10, an annular wall portion 30, and a fastener 5. The first adhesive portion 10 has, for example, a cylindrical shape with a portion of the outer circumferential surface missing. The annular wall portion 30 is provided to surround the first adhesive portion 10. The fastener 5 includes 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 includes a tubular member 40, a string 7, and a string holding portion 6. The string 7 is attached to the tubular member 40. A portion of the string holding portion 6 is disposed in an area surrounded by the inner circumferential surface of the tubular member 40.

[0030] FIG. 2 is a first schematic cross-sectional view showing the configuration of the connection structure 100 according to the first embodiment. As shown in FIG. 2, the fastener 5 further includes 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 includes a fixing portion 73. The fixing portion 73 includes 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 approach each other.

[0031] As shown in FIG. 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 device 1 and the second device 2 are attracted to each other by magnetic force between the first magnetic element 51 and the second magnetic element 52. As a result, the first adhesive surface 11 and the second adhesive surface 21 are adhered to each other.

[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 to each other by magnetic force is referred to as the magnetic force direction Z. The direction from the first adhesive portion 10 to the second adhesive portion 20 is referred to as the upward direction. Conversely, the direction from the second adhesive portion 20 to the first adhesive portion 10 is referred to as the downward direction. A direction perpendicular to the magnetic force direction Z is referred to as the in-plane direction. Of the in-plane directions, the direction parallel to the direction from the first adhesive portion 10 to the fixing portion 73 is referred to as the left-right direction X. A direction perpendicular to both the magnetic force direction Z and the left-right direction X is referred to as the front-rear direction Y (see FIG. 4).

[0033] Each of the first direction 101 and the second direction 102 is a direction perpendicular to the magnetic force direction Z. Each of the first direction 101 and the second direction 102 is a direction based on the first adhesive portion 10. From another perspective, 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 parallel to, for example, the left-right direction X. The second direction 102 is different from the first direction 101. For example, the second direction 102 is the opposite direction to the first direction 101. The second direction 102 only needs to be different from the first direction 101, and is not limited to being the opposite direction to the first direction 101.

[0034] The first device 1 and the second device 2 are connected detachably and relatively rotatably around an axis in the magnetic force direction Z. The second adhesive surface 21 is slidable on the first adhesive surface 11. The second device 2 is rotatable relative to the first device 1. The rotation axis of the second device 2 is, for example, perpendicular to the second adhesive surface 21. The second adhesive surface 21 may be circular. The rotation axis of the second device 2 passes through the center of the second adhesive surface 21, for example.

[0035] 3 is an enlarged schematic view of region III in FIG. 2. As shown in FIG. 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 tubular. The first wall surface 31 may be cylindrical or may have a rectangular tubular shape. Similarly, the second wall surface 32 is tubular. The second wall surface 32 may be cylindrical or may have a rectangular tubular shape. 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 continuous with each of 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 continuous with the first wall surface 31. The first top surface 34 is continuous with the 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 perspective, 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 FIG. 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 continuous with 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 upper surface 16. The third upper surface 16 is continuous with the first adhesive surface 11. The first adhesive surface 11 contacts the second adhesive surface 21. The third upper surface 16 may not contact 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 adhesive 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 sandwiching member 3 has a first plate-shaped member 36 and a second plate-shaped member 38. The first plate-shaped member 36 and the second plate-shaped member 38 are each made of, for example, resin. The first plate-shaped member 36 has a first lower surface 35. The first lower surface 35 is located opposite the first bottom surface 91 and the first upper surface 34. A first recess 37 is provided in the first lower surface 35. The first recess 37 is provided below 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 arranged 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 on 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 composed of, for example, resin, or may be composed of the first magnet 15.

[0040] 3, the second magnetic element 52 has a yoke member 24 and a second magnet 25. The yoke member 24 may be provided on the second adhesive surface 21, or may be provided between the second adhesive surface 21 and the second magnet 25. In the magnetic force direction Z, the second magnet 25 is located above the second adhesive surface 21. In the magnetic force direction Z, the second magnet 25 is provided between the yoke member 24 and the backing plate 9. The second adhesive surface 21 is formed, for example, by the yoke member 24. The second adhesive surface 21 may be formed, for example, by a resin, or may be formed by 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 continuous with 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. Note that 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 protruding portion 49. The protruding portion 49 is continuous with the main body portion 48. The protruding portion 49 is cylindrical. The protruding portion 49 may be in the shape of a circular ring or a rectangular ring. Similarly, the main body portion 48 is cylindrical. The main body portion 48 may be in the shape of a circular ring or a rectangular ring. The main body portion 48 and the protruding portion 49 may be integrally formed. The protruding portion 49 is provided on the lower side of the main body portion 48. The protruding portion 49 may protrude from the second bottom surface 92.

[0043] Cylindrical member 40 has a second inner circumferential surface 41, a second outer circumferential surface 42, and a second lower surface 43. Second outer circumferential surface 42 is located outside second inner circumferential surface 41. Second inner circumferential surface 41 and second outer circumferential surface 42 are each continuous with second lower surface 43. Second inner circumferential surface 41 is provided with a second recess 46. A portion of yoke member 24 and a portion of coil backing plate 9 may be inserted into second recess 46. Yoke member 24 and coil backing plate 9 may each be in contact with 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 continuous with the second lower surface 43. The first inner circumferential surface portion 44 faces the first outer circumferential surface 12. As shown in FIG. 3 , the first inner circumferential surface portion 44 may be inclined with respect to the magnetic force direction Z so that the distance between the first inner circumferential surface portion 44 in the left-right direction X increases toward the lower side. 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 portion of the second inner circumferential surface 41, and a portion 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] 3, the protrusion 49 is positioned between the first wall surface 31 and the first adhesive portion 10 with a clearance that allows the protrusion 49 to tilt in response to a pull that includes a directional component perpendicular to the magnetic force direction Z. 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 in the left-right direction X.

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

[0048] Although the above describes an example in which a gap is provided between the protrusion 49 and the first outer peripheral surface 12 of the first adhesive portion 10, the present disclosure is not limited to the above configuration. In a connection structure according to a modified example, a gap does not have to be provided between the protrusion 49 and the first outer peripheral surface 12 of the first adhesive portion 10.

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

[0050] As shown in FIG. 4, the second device 2 has a coil spring 8 and a backing plate 9. The coil spring 8 is provided on the backing 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 backing plate 9 is provided in an area surrounded by the second inner circumferential surface 41 of the tubular 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 arranged in the pair of third recesses 6b. The second inner circumferential surface 41 of the tubular member 40 covers each of the pair of third recesses 6b. [B. 1st device] 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 FIG. 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. The first wall surface 31 is spaced apart from the first outer peripheral surface 12 of the first adhesive portion 10 along the entire circumference of the first wall surface 31. The clearance between the first wall surface 31 and the first outer peripheral surface 12 in the first direction 101 (third clearance C3) is larger 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] FIG. 6 is a cross-sectional schematic diagram showing the configuration of the first adhesive portion 10. The cross section shown in FIG. 6 is a cross section perpendicular to the magnetic force direction Z. As shown in FIG. 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 linear portion 13. The first arc-shaped portion 27 is continuous with both ends of the first linear portion 13. In the cross section perpendicular to the magnetic force direction Z, the first outer peripheral surface 12 of the first adhesive portion 10 has a generally D-shape. The direction in which the first linear portion 13 extends may be perpendicular to the first direction 101. From another perspective, the first linear portion 13 may extend along the front-rear direction Y.

[0052] As shown in FIG. 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 perspective, 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] FIG. 7 is a schematic diagram showing a 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 FIG. 7, when the convex portion 49 of the second device 2 tilts in the first direction 101, the convex portion 49 comes into contact with the first wall surface 31. The tilt angle when the convex portion 49 comes into contact with the first wall surface 31 on the first direction 101 side is defined as a first angle θ1. The first angle θ1 is the angle formed between the first wall surface 31 and the second outer peripheral surface 42 when the convex portion 49 comes into contact with the first wall surface 31 on the first direction 101 side.

[0053] When the protrusion 49 comes into contact with the first wall surface 31, the protrusion 49 may be spaced apart from the first adhesive portion 10. After the protrusion 49 comes into contact with the first wall surface 31, if the user further pulls the string 7 in the first direction 101, the protrusion 49 will rotate in the first direction 101 with the contact point between the first wall surface 31 and the protrusion 49 as a fulcrum. This causes the second device 2 to be detached from the first device 1.

[0054] FIG. 8 is a schematic diagram showing the second device 2 tilted in the second direction 102. When the user pulls the string 7 in the second direction 102, the second device 2 tilts in the second direction 102 relative to the first device 1. As shown in FIG. 8, when the convex portion 49 of the second device 2 tilts in the second direction 102, the convex portion 49 comes into contact with the first wall surface 31. The tilt angle when the convex portion 49 comes into contact with the first wall surface 31 on the second direction 102 side is defined as a second angle θ2. The second angle θ2 is the angle formed between the first wall surface 31 and the second outer peripheral surface 42 when the convex portion 49 comes into contact with the first wall surface 31 on the second direction 102 side.

[0055] 8 , when the protrusion 49 comes into contact with the first wall surface 31, the protrusion 49 may also come into contact with the first adhesive portion 10. In other words, when the protrusion 49 tilts in the second direction 102, the protrusion 49 may come into contact with both the first wall surface 31 and the first adhesive portion 10. After the protrusion 49 comes into contact with the first wall surface 31, if the user further pulls the string 7 in the second direction 102, the protrusion 49 will rotate in the second direction 102, with the contact point between the first wall surface 31 and the protrusion 49 as the fulcrum. As a result, the second device 2 is detached from the first device 1.

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

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

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

[0059] When the protrusion 49 tilts, the tilt may be stopped by the protrusion 49 coming into contact with at least one of the first adhesive portion 10 and the first wall surface 31. From another perspective, the tilt of the protrusion 49 may be stopped by the protrusion 49 coming into contact with the first adhesive portion 10, or the first wall surface 31, or the tilt of the protrusion 49 may be stopped by the protrusion 49 coming into contact with both the first adhesive portion 10 and the first wall surface 31. Regarding the tilt angle when the tilt of the protrusion 49 is stopped, the angle when the protrusion 49 tilts in the first direction 101 (first angle θ1) may be larger than the angle when the protrusion 49 tilts in the second direction 102 (second angle θ2). When the tilt of the protrusion 49 is stopped, the distance between the first magnetic element 51 and the second magnetic element 52 increases. Therefore, when the second device 2 is pulled upward to be removed, the force required for removal 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, but other configurations are similar to those of the connection structure 100 according to the second embodiment. Below, the configurations that differ from the connection structure 100 according to the first embodiment will be mainly described.

[0060] FIG. 10 is a schematic top view showing the configuration of a first device 1 of a connection structure 100 according to the second embodiment. As shown in FIG. 10, when viewed in the magnetic force direction Z, the first device 1 has a protruding portion 70 that is substantially C-shaped. 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. FIG. 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 FIG. 11 is perpendicular to the magnetic force direction Z.

[0061] As shown in FIG. 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 closer to the second direction 102 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 angle of each of the second arc-shaped portion 26 and the third arc-shaped portion 17 is, for example, 180°. The central angle of each of the second arc-shaped portion 26 and the third arc-shaped portion 17 may be, for example, greater than or equal to 150° and less than or equal to 210°.

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

[0063] 13 , in the magnetic force direction Z, the first adhesive surface 11 may be located at the same height as the first bottom surface 91. In the magnetic force direction Z, the second adhesive surface 21 may be located lower than the second lower surface 43 of the tubular member 40. In the left-right direction X, the protruding portion 70 is located closer to the second direction 102 than 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 come into contact with the second inner circumferential surface 41 of the convex portion 49 on the second direction 102 side. From another perspective, 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, a description will be given of the configuration of the mounting structure according to the third embodiment. Fig. 14 is a cross-sectional view showing the configuration of the mounting structure according to the third embodiment.

[0065] The attachment structure 100 according to the third embodiment includes a bedding attachment device 1 and an appliance 2. The attachment structure 100 according to the third embodiment corresponds to the connecting structure 100 according to the first and second embodiments. The bedding attachment device 1 is attached to a bedding 61. The bedding attachment device 1 corresponds to the first device 1 of the connecting structure 100 according to the first and second embodiments. As shown in FIG. 14 , the bedding attachment device 1 includes a bedding fixing portion 73, a first adhesive portion 10, a fastener 5, and an annular wall portion 30. The bedding fixing portion 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, a mattress, a blanket, a bed, or a sheet.

[0066] The bedding fixing portion 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 a user pinches the right end of the first clamping member 3 and the right end of the second clamping member 4, the first clamping member 3 and the second clamping member 4 each rotate around the support 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 sandwiched between the first pressing member 71 and the second pressing member 72. As a result, the bedding fixing portion 73 is fixed to the bedding 61. The bedding fixing portion 73 is located, for example, on the first direction 101 side when viewed from the first adhesive portion 10. The bedding fixing part 73 is not located on an extension line of the magnetic force direction Z.

[0067] The device 2 corresponds to the second device 2 of the connection structure 100 according to the first and second embodiments. The device 2 is, for example, a strap. The device 2 may also be a game console 62 with a strap. The device 2 mainly has a second adhesive portion 20, a tubular member 40, a string holding portion 6, a coil spring 8, a receiving plate 9, and a string 7. The bedding attachment device 1 and the device 2 are adhered to each other so as to be relatively rotatable about the axis of the magnetic force direction Z and so as to be detachable, as the first adhesive portion 10 and the second adhesive portion 20 are adhered together by the magnetic force of the first magnetic element 51 and the second magnetic element 52.

[0068] As shown in FIGS. 3 and 13, the bedding attachment device 1 and the device 2 have a movement restricting portion 81. The movement restricting portion 81 restricts relative movement between 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 attached to each other. The movement restricting portion 81 is formed, for example, by a first outer peripheral surface 12 and a second inner peripheral surface 41 (see FIG. 3). The first outer peripheral surface 12 is formed by a first linear portion 13 and an arc (first arc-shaped portion 27) having a length equal to or greater than the arc of a semicircle (see FIG. 6). The first outer peripheral surface 12 suppresses rattle of the device 2 in the left-right direction X. In addition to or instead of the above configuration, the movement restricting portion 81 may be formed by a combination of the first wall surface 31 of the annular wall portion 30 and the second outer peripheral surface 42 of the protrusion 49.

[0069] As shown in Fig. 3, the bedding attachment device 1 and the device 2 have a rotation restricting portion 82. When the first adhesive portion 10 and the second adhesive portion 20 rotate relative to each other in the magnetic force direction Z from a state in which the first adhesive portion 10 and the second adhesive portion 20 are adhered to each other so as to move apart, the rotation restricting portion 82 restricts rotation about the side opposite the bedding fastening portion 73 relative to the first adhesive portion 10, rather than rotation about the bedding fastening portion 73. As shown in Fig. 3, the rotation restricting portion 82 may be formed by 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 relatively in the magnetic force direction Z from a state in which they are adhered to each other so that they move away from each other, the rotation restricting portion 82 may not restrict rotation about the bedding fixing portion 73 side, but may restrict rotation about the side opposite the bedding fixing portion 73 side with respect to the first adhesive portion 10. As shown in FIGS. 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 may 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 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 Fig. 13, the rotation restricting portion 82 may be composed of the protruding portion 70 and the 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 come into contact with the protruding portion 70, and when the second adhesive portion 20 rotates toward the opposite side from the bedding fixing portion 73 side, the second inner circumferential surface 41 of the convex portion 49 on the opposite side from the bedding fixing portion 73 side may come into contact with the protruding portion 70 (see Fig. 13).

[0072] When the first adhesive portion 10 and the second adhesive portion 20 rotate relatively away from each other in the magnetic force direction Z from a state in which they are adhered, the angle at which the rotation of the device 2 is restricted when the device 2 rotates about the bedding fixing portion 73 side may be larger than the angle at which the rotation of the device 2 is restricted when the device 2 rotates about the side opposite the bedding fixing portion 73 side with respect to the first adhesive portion 10. From another perspective, 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 larger than the angle at which the rotation of the device 2 is restricted when the device 2 rotates toward the bedding fixing portion 73 side (second angle θ2) (see FIGS. 8 and 9 ).

[0073] In the above, the bedding attachment 1 has been described as an example of the first device 1, but the first device 1 is not limited to the bedding attachment 1. The first device 1 may be attached to an object other than the 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 portion 82 is not limited to the above-described configuration in which the rotation restricting portion 82 abuts against the wall surface earlier when rotated to one side than when rotated to the other side. For example, the rotation restricting portion 82 may be configured so that a stronger force is required when rotated to one side than when rotated to the other side. A buffer material, for example, may be used to adjust the force restricting the rotation. Alternatively, another magnet may be further provided so that a stronger attractive force is exerted when rotated to one side than when rotated to the other side.

[0075] The game machine 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, a dynamic random access memory (DRAM). The memory unit may store, for example, an application program for a game. The processor may be capable of reading the application program and executing information processing. The display may display, for example, an image generated as a result of information processing executed by the processor.

[0076] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0077] 1 First device (bedding attachment device), 2 Second device (apparatus), 3 First clamping member, 4 Second clamping member, 5 Fastener, 6 String holding portion, 6a Coil spring arrangement hole, 6b Third recess, 7 String, 8 Coil spring, 9 Plate, 10 First adhesive portion, 11 First adhesive surface, 12 First outer peripheral surface, 13 Straight portion (first straight portion), 14 Top portion, 15 First magnet, 16 Third upper surface, 17 Third arc-shaped portion, 18 Connection portion, 20 Second adhesive portion, 21 Second adhesive surface, 22 Second outer surface, 24 Yoke member (member), 25 Second magnet, 26 Second arc-shaped portion, 27 Arc-shaped portion (first arc-shaped portion), 30 Annular wall portion, 31 Wall surface (first wall surface), 32 Second wall surface, 33 First top surface, 34 First upper surface, 35 First lower surface, 36 First plate-shaped member, 37 First recess, 38 Second plate-shaped member, 40 Cylindrical member, 41 Second inner peripheral surface, 42 Second outer peripheral surface, 43 Second lower surface, 44 First inner peripheral surface portion, 45 Second inner peripheral surface portion, 46 Second recess, 47 Third inner peripheral surface portion, 48 Main body portion, 49 Convex portion, 51 First magnetic element, 52 Second magnetic element, 53 Support shaft member, 54 Spring member, 61 Bedding, 62 Game machine, 70 Protruding portion, 71 First pressing member, 72 Second pressing member, 73 Bedding fixing portion, 81 Movement restricting portion, 82 Rotation restricting portion, 91 First bottom surface, 92 Second bottom surface, 100 Connection structure (mounting structure), 101 First direction, 102 Second direction, C1 First clearance, C2 Second clearance, C3 Third clearance, C4 4th clearance, X left-right direction, Y front-back direction, Z magnetic force direction.

Claims

1. A connection structure including a first device and a second device, The first device is A first bottom surface; a first adhesive portion having a first wall surface protruding from the first bottom surface, a first adhesive surface at a top portion, and a first magnetic element; a cylindrical second wall surface that surrounds the top portion, protrudes from the first bottom surface higher than the first adhesive surface, and faces the first wall surface; The second device is a second adhesive portion defining a second adhesive surface and including a second magnetic element; a cylindrical protrusion surrounding the second adhesive portion, the first device and the second device are connected to each other in a relatively rotatable and detachable manner around an axis in the direction of the magnetic force by the first magnetic element and the second magnetic element being attracted to each other by the magnetic force, and the first adhesive surface and the second adhesive surface being attached to each other; the protrusion is located between the first wall surface and the second wall surface with a clearance that allows the protrusion to tilt in response to a pull that includes a directional component perpendicular to the magnetic force direction, A connection structure in which, in the first device, the clearance between the first wall surface and the convex portion in a first direction perpendicular to the magnetic force direction is larger than the clearance between the first wall surface and the convex portion in a second direction different from the first direction.

2. the second wall surface is cylindrical; The convex portion has a circular cylindrical shape, The connection structure according to claim 1 , wherein the first wall surface has a cylindrical shape with a portion of the outer circumferential surface missing.

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

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

5. the second device has a second bottom surface; The connection structure according to claim 1 , wherein the second adhesive portion protrudes from the second bottom surface.

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

7. When the protrusion tilts, the protrusion contacts at least one of the first wall surface and the second wall surface, thereby stopping the tilting.

7. The connection structure according to claim 1, wherein the tilt angle when the tilt of the convex portion is stopped is greater than the angle when the convex portion is tilted in the first direction than the angle when the convex portion is tilted in the second direction.

8. 7. The connection structure according to claim 1, wherein the angle of inclination of the convex portion when the convex portion is inclined and in contact with both the first wall surface and the second wall surface is greater when the convex portion is inclined in the first direction than when the convex portion is inclined in the second direction.

9. 7. The connection structure according to claim 1, wherein the angle of inclination of the convex portion when the convex portion is inclined and contacts the second wall surface is greater when the convex portion is inclined in the first direction than when the convex portion is inclined in the second direction.

10. the first magnetic element comprises a first magnet; the second magnetic element comprises a second magnet; 10. A connection structure according to claim 1, 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 or between the second adhesive surface and the second magnet.

Images