Ring binder

Abstract

The present invention provides a ring-type binder that reduces the risk of the first and second substrates detaching from the sheath and allows for a lower overall height. [Solution] A ring-type fastener comprising a first substrate 1 and a second substrate 2 arranged side by side in a first direction D1, a plurality of dividing ring portions 3 provided on the surfaces of the first substrate 1 and the second substrate 2, and a sheath 4 arranged on the back side of the first substrate 1 and the second substrate 2, which sandwiches the first substrate 1 and the second substrate 2 from the outside in the first direction D1 and holds them by pressing them against each other, wherein the rotational displacement of the first substrate 1 and the second substrate 2 under the action of the pressing force of the sheath 4 switches between a closed state in which the tips of the dividing ring portions 3 are close to each other and an open state in which they are separated from each other, wherein a protrusion 5 is provided on the back surface of at least one of the first substrate 1 and the second substrate 2 that fits under the back surface of the other, the protrusion 5 abuts against at least the other of the first substrate 1 and the second substrate 2 and restricts rotational displacement, and the surface of the protrusion 5 is provided as a first surface that extends parallel to the first direction D1 in the closed state.

Description

【Technical Field】 【0001】 The present invention relates to a ring-type fastener whose state is switched between a closed state and an open state by the rotational displacement of a first substrate and a second substrate under the action of the pressing force of a sheath. 【Background Art】 【0002】 Examples of this type of conventionally used ring-type fastener include the ring-type fastener shown in Patent Document 1 below. Patent Document 1 discloses a ring-type fastener whose state is switched between a closed state and an open state by the rotational displacement of a first substrate and a second substrate under the action of the pressing force of a sheath. It is disclosed that fulcrum convex portions serving as rotational fulcrums for the rotational displacement are provided on the first substrate and the second substrate. The fulcrum convex portion of the first substrate enters below the second substrate, and the fulcrum convex portion of the second substrate enters below the first substrate. The fulcrum convex portion is formed as a protrusion having a substantially triangular cross section. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent No. 7402583 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 When the ring-type fastener is in the open state, if the first substrate and the second substrate rotate excessively, the first substrate and the second substrate may come off the sheath. Protrusions protruding from the first substrate and the second substrate, such as the fulcrum convex portions disclosed in Patent Document 1, also contribute to preventing detachment. The larger the protruding amount of the protrusions from the first substrate and the second substrate, the more reliably detachment can be prevented. 【0005】 However, in conventional configurations, the protruding part (pivot projection) is formed as a roughly triangular projection when viewed in cross-section. Therefore, if the overall size of the protruding part is increased in order to increase the amount of protrusion from the first and second substrates, the thickness of the protruding part increases, which hinders the reduction of the overall height of the ring binder. 【0006】 The present invention was made to solve the above-mentioned problems, and one of its objectives is to provide a ring-type binder that can reduce the overall height while suppressing the risk of the first and second substrates coming off the sheath. [Means for solving the problem] 【0007】 [1] In one embodiment, the present invention comprises a first substrate and a second substrate arranged side by side in a first direction, a plurality of dividing ring portions provided on the surfaces of the first substrate and the second substrate, and a longitudinal sheath positioned on the back side of the first substrate and the second substrate, which sandwiches the first substrate and the second substrate from the outside in the first direction, pressing the first substrate and the second substrate together to hold them, wherein the rotational displacement of the first substrate and the second substrate under the action of the pressing force of the sheath brings the respective tips of the dividing ring portions closer to each other in a closed state, and the The ring binder is configured such that the state can be switched between an open state in which the ends of each divided ring portion are separated from each other, wherein at least one of the back surfaces of the first substrate and the second substrate is provided with a projection that fits under at least the other back surface, the projection is configured to abut against at least the other of the first substrate and the second substrate in the open state and restrict the rotational displacement of the first substrate and the second substrate, and the surface of the projection is provided with a first surface that extends parallel to the first direction in the closed state. 【0008】 [2] The present invention may relate to the ring binder described in paragraph 1, wherein at least the other of the first substrate and the second substrate is provided with a recess or opening into which the protruding portion fits when the open state, and the recess or opening is provided with a receiving portion that is inclined with respect to the first direction such that when the closed state, it moves from the outside to the inside of at least the other of the first substrate and the second substrate toward the back side of at least the other of the first substrate and the second substrate, and which at least partially abuts against the first surface when the open state. 【0009】 [3] The present invention relates to a ring binder according to paragraph 1 or 2, wherein the front-back direction of the first and second substrates perpendicular to the first direction is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, an inner shaft portion is provided on the inside of the first and second substrates relating to the first direction, which serves as an axis of relative rotation between the first and second substrates, and when viewed in a cross section at the position of the protrusion, the position of the inner shaft portion is provided inside the protrusion. 【0010】 [4] The present invention may relate to the ring fastener described in paragraph 3, wherein the first surface is positioned closer to the sheath than the inner shaft portion. 【0011】 [5] The present invention relates to a ring-type fastener according to any one of paragraphs 1 to 4, wherein the front-back direction of the first substrate and the second substrate perpendicular to the first direction is defined as the second direction, and the direction perpendicular to the first direction and the second direction is defined as the third direction, the surface of the sheath is provided with a relief groove extending in the third direction, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region of the portion of the protrusion that protrudes most towards the sheath in the first direction is included in the extending region of the relief groove in the first direction. 【0012】 [6] The present invention may relate to the ring fastener described in paragraph 5, wherein the first substrate and the second substrate are provided with a rotating shaft portion that serves as an axis of relative rotation between the first substrate and the second substrate, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region in the first direction of the portion of the rotating shaft portion that protrudes most towards the sheath is included in the extending region of the relief groove in the first direction. 【0013】 [7] The present invention relates to a ring binder according to any one of paragraphs 1 to 6, wherein the front-back direction of the first and second substrates perpendicular to the first direction is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, the sheath is provided with at least one relief hole, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region of the portion of the protrusion that protrudes most towards the sheath in the first direction is included in the extending region of the relief hole in the first direction. 【0014】 [8] The present invention may relate to the ring fastener described in paragraph 7, wherein the first substrate and the second substrate are provided with a rotating shaft portion that serves as an axis of relative rotation between the first substrate and the second substrate, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region in the first direction of the portion of the rotating shaft portion that protrudes most towards the sheath is included in the extending region of the relief hole in the first direction. 【0015】 [9] The present invention may relate to the ring binder described in any one of paragraphs 1 to 8, wherein the first substrate, the second substrate and the sheath are made of a material including a resin material. 【0016】

[10] The present invention relates to a ring binder according to any one of paragraphs 1 to 9, wherein the front-back direction of the first substrate and the second substrate that is perpendicular to the first direction is designated as the second direction, the direction perpendicular to the first direction and the second direction is designated as the third direction, and when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, a first outer shaft portion is provided on the outside of the first substrate relating to the first direction, which serves as the axis of rotation of the first substrate relative to the sheath, a second outer shaft portion is provided on the outside of the second substrate relating to the first direction, which serves as the axis of rotation of the second substrate relative to the sheath, and an inner shaft portion is provided on the inside of the first substrate and the second substrate relating to the first direction, which serves as the axis of rotation between the first substrate and the second substrate, and with respect to the first direction, the inner shaft portion is positioned closer to the first outer shaft portion than the center position between the first outer shaft portion and the second outer shaft portion. 【0017】

[11] In one embodiment, the present invention comprises a first and second longitudinal substrate arranged side by side in a first direction, a plurality of divided ring portions provided on the surfaces of the first and second substrates, and a longitudinal sheath positioned on the back side of the first and second substrates, which sandwiches the first and second substrates from the outside in the first direction, pressing the first and second substrates against each other to hold them, wherein the rotational displacement of the first and second substrates under the action of the pressing force of the sheath causes the state to be switched between a closed state in which the respective tips of the divided ring portions are brought close to each other and an open state in which the respective tips of the divided ring portions are separated from each other. The present invention relates to a ring-type binder, wherein the first and second substrates are provided with a rotating shaft portion that serves as an axis of relative rotation between the first and second substrates, the front-back direction of the first and second substrates perpendicular to the first direction is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, the surface of the sheath is provided with a relief groove extending in the third direction, and when the first substrate, second substrate and sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region of the portion of the rotating shaft portion that protrudes most towards the sheath is included in the extending region of the relief groove in the first direction. 【0018】

[12] In one embodiment, the present invention comprises a first substrate and a second substrate arranged side by side in a first direction, a plurality of dividing ring portions provided on the surfaces of the first substrate and the second substrate, and a longitudinal sheath positioned on the back side of the first substrate and the second substrate, which sandwiches the first substrate and the second substrate from the outside in the first direction, pressing the first substrate and the second substrate together to hold them, wherein the rotational displacement of the first substrate and the second substrate under the action of the pressing force of the sheath causes the state to switch between a closed state in which the respective tips of the dividing ring portions are brought close to each other and an open state in which the respective tips of the dividing ring portions are separated from each other. The present invention relates to a ring-type binder, wherein the first substrate and the second substrate are provided with a rotating shaft portion that serves as an axis of relative rotation between the first substrate and the second substrate, and the sheath is provided with a relief hole, and when the front-back direction of the first substrate and the second substrate perpendicular to the first direction is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, when the first substrate, the second substrate and the sheath are viewed in a cross section perpendicular to the third direction, in the closed state, the extending region of the portion of the rotating shaft portion that protrudes most towards the sheath is included in the extending region of the relief hole in the first direction. [Effects of the Invention] 【0019】 According to one embodiment of the ring-type binder of the present invention, the surface of the protruding portion is provided with a first surface that extends parallel to the first direction when closed. Therefore, even if the amount of protrusion from at least one of the first substrate and the second substrate is increased, it is possible to avoid increasing the thickness of the protruding portion, thereby reducing the risk of the first substrate and the second substrate coming off the sheath while lowering the overall height. [Brief explanation of the drawing] 【0020】 [Figure 1] This is a perspective view showing a ring binder according to Embodiment 1 of the present invention. [Figure 2] This is a perspective view showing the ring binder in the open position of Figure 1. [Figure 3]It is a perspective view showing the sheath body of FIG. 1. [Figure 4] It is a perspective view showing the ring fastener of FIG. 1 when viewed from the back side with the sheath body 4 removed. [Figure 5] It is a perspective view showing the ring fastener of FIG. 4 in the open state. [Figure 6] It is an enlarged perspective view showing the region VI of FIG. 5. [Figure 7] It is a perspective view showing the second substrate when viewed along the arrow VII of FIG. 5. [Figure 8] It is a perspective view showing the first substrate corresponding to the portion of the second substrate of FIG. 7. [Figure 9] It is a plan view showing the ring fastener of FIG. 1. [Figure 10] It is a cross-sectional view of the ring fastener along the line X-X of FIG. 9. [Figure 11] It is a cross-sectional view of the ring fastener of FIG. 10 in the open state. [Figure 12] It is a cross-sectional view of the ring fastener along the line XII-XII of FIG. 9. [Figure 13] It is a cross-sectional view of the ring fastener of FIG. 12 in the open state. [Figure 14] It is a cross-sectional view of the ring fastener along the line XIV-XIV of FIG. 9. [Figure 15] It is a cross-sectional view of the ring fastener of FIG. 14 in the open state. [Figure 16] It is an explanatory view showing the effect due to the inner shaft portion being arranged at a position closer to the first outer shaft portion than the central position CP. [Figure 17] It is a perspective view showing the ring fastener according to Embodiment 2 of the present invention. [Figure 18] It is an enlarged perspective view showing the region XVIII of FIG. 17. [Figure 19] It is a cross-sectional view of the ring fastener of FIG. 17 at the position of the protrusion. [Figure 20] It is a cross-sectional view of the ring fastener of FIG. 19 in the open state. [Figure 21] It is a cross-sectional view of the ring fastener of FIG. 17 at the position of the rotation shaft portion. [Figure 22] This is a cross-sectional view of the ring binder shown in Figure 21 in the open position. [Modes for carrying out the invention] 【0021】 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and can be materialized by modifying the components without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in each embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, components from different embodiments may be appropriately combined. 【0022】 Embodiment 1. Figure 1 is a perspective view showing a ring binder according to Embodiment 1 of the present invention, Figure 2 is a perspective view showing the ring binder of Figure 1 in the open state, and Figure 3 is a perspective view showing the sheath 4 of Figure 1. Figure 4 is a perspective view showing the ring fastener of Figure 1 when the sheath 4 is removed and viewed from the back; Figure 5 is a perspective view showing the ring fastener of Figure 4 in the open state; Figure 6 is an enlarged perspective view showing region VI of Figure 5; Figure 7 is a perspective view showing the second substrate 2 as seen along arrow VII of Figure 5; and Figure 8 is a perspective view showing the first substrate 1 corresponding to the portion of the second substrate 2 in Figure 7. Figure 9 is a plan view showing the ring binder of Figure 1, Figure 10 is a cross-sectional view of the ring binder along line XX in Figure 9, Figure 11 is a cross-sectional view of the ring binder of Figure 10 in the open state, Figure 12 is a cross-sectional view of the ring binder along line XII-XII in Figure 9, Figure 13 is a cross-sectional view of the ring binder of Figure 12 in the open state, Figure 14 is a cross-sectional view of the ring binder along line XIV-XIV in Figure 9, Figure 15 is a cross-sectional view of the ring binder of Figure 14 in the open state, and Figure 16 is an explanatory diagram showing the effect of the inner shaft portion 73 being positioned closer to the first outer shaft portion 71 than to the center position CP. 【0023】 In describing the ring binder of this embodiment, the terms first direction D1, second direction D2, and third direction D3 will be used below. The first direction D1 is the direction in which the first substrate 1 and the second substrate 2, described later, are aligned; the second direction D2 is the front-back direction of the first substrate 1 and the second substrate 2, perpendicular to the first direction D1; and the third direction D3 is the direction perpendicular to the first direction D1 and the second direction D2. When the first substrate 1 and the second substrate 2 extend longer in the third direction D3 compared to the first direction D1, as in the embodiment shown in Figure 1, the first direction D1 may be called the width direction and the third direction D3 may be called the length direction. 【0024】 As shown in Figures 1 and 2, the ring binder of this embodiment includes a first substrate 1, a second substrate 2, a plurality of divided ring portions 3, and a sheath 4. 【0025】 The first substrate 1 and the second substrate 2 are longitudinal members arranged side by side in a first direction D1. Multiple divided ring portions 3 are provided on the surfaces of the first substrate 1 and the second substrate 2. In the illustrated embodiment, four divided ring portions 3 are provided at one end of the first substrate 1 relating to the third direction D3, and four divided ring portions 3 are provided at the other end of the first substrate 1 relating to the third direction D3. A total of eight divided ring portions 3 are provided on the second substrate 2 at the same positions as the divided ring portions 3 of the first substrate 1 relating to the third direction D3. The divided ring portions 3 of the first substrate 1 and the divided ring portions 3 of the second substrate 2 are formed to form a ring as a whole when their tips are brought close to each other, as shown in Figure 1. 【0026】 The sheath 4 is a longitudinal member positioned on the back side of the first substrate 1 and the second substrate 2, and sandwiches the first substrate 1 and the second substrate 2 from the outside in the first direction D1, pressing them together and holding them in place. As shown in Figures 3 and 10, the sheath 4 includes a back plate portion 40 and a pair of side plate portions 41 that rise from both side edges of the back plate portion 40. The first substrate 1 and the second substrate 2 are sandwiched between the pair of side plate portions 41. 【0027】 The ring-type fastener of this embodiment is configured such that the rotational displacement of the first substrate 1 and the second substrate 2 under the action of the pressing force of the sheath 4 allows the state to be switched between a closed state in which the respective ends of the divided ring portion 3 are brought close to each other (see Figure 1) and an open state in which the respective ends of the divided ring portion 3 are separated from each other (see Figure 2). 【0028】 As shown in Figures 10 and 11, at least one of the back surfaces of the first substrate 1 and the second substrate 2 is provided with a projection 5 that fits under at least the other back surface. The projection 5 is configured to abut against at least the other of the first substrate 1 and the second substrate 2 when open, thereby restricting the rotational displacement of the first substrate 1 and the second substrate 2. Figures 10 and 11 show the projection 5 provided on the first substrate 1 fitting under the back surface of the second substrate 2. Figure 11 shows how the projection 5 abuts against the second substrate 2, restricting the rotational displacement of the first substrate 1 and the second substrate 2. A similar projection 5 may be provided on the second substrate 2. The projection 5 is also shown in Figure 8, etc. 【0029】 As shown in Figure 10, the surface of the protruding portion 5 is provided with a first surface 51 that extends parallel to the first direction D1 when closed. If the first substrate 1 and the second substrate 2 rotate excessively, the first substrate 1 and the second substrate 2 may detach from the sheath 4. The larger the amount of protrusion of the protruding portion 5 from at least one of the first substrate 1 and the second substrate 2, the more reliably detachment can be prevented. Assuming that the first surface 51 is omitted from the protruding portion 5, as in the first flange portion 11 and the second flange portion 21 described later, and the protruding portion 5 is formed as a roughly triangular projection when viewed in cross-section, then in such a configuration, if the overall size of the protruding portion 5 is increased in order to increase the amount of protrusion from at least one of the first substrate 1 and the second substrate 2, the thickness of the protruding portion 5 will increase, which will hinder the reduction of the overall height of the ring binder. As in the ring binder of this embodiment, by providing a first surface 51 on the surface of the protruding portion 5, it is possible to increase the amount of protrusion of the protruding portion 5 from at least one of the first substrate 1 and the second substrate 2 while suppressing an increase in the thickness of the protruding portion 5. This reduces the risk of the first substrate 1 and the second substrate 2 coming off the sheath 4, and allows the overall height of the ring binder to be reduced. 【0030】 The surface of the protruding portion 5 may be provided with a second surface 52 extending between the inner surface of at least one of the first substrate 1 and the second substrate 2 and the first surface 51, and a third surface 53 extending from the tip of the first surface 51. The second surface 52 and the third surface 53 may extend inclined with respect to the first direction D1 such that as they move away from at least one of the first substrate 1 and the second substrate 2 in the first direction D1, they move toward the back side of at least one of the first substrate 1 and the second substrate 2. 【0031】 At least the other of the first substrate 1 and the second substrate 2 (the second substrate 2 in Figures 10 and 11) may be provided with a recess 60 into which the protrusion 5 fits when the substrate is open (see Figures 11 and 6). The recess 60 may be provided with a receiving surface 61. The receiving surface 61 is inclined with respect to the first direction D1 such that, in the closed state (see Figure 10), it moves from the outside to the inside of at least the other substrate 1 and the second substrate 2 in the first direction D1, and may at least partially abut against the first surface 51 when the substrate is open (see Figure 11). By providing a recess 60 with such a structure, the amount of protrusion 5 from at least one of the first substrate 1 and the second substrate 2 can be increased while more reliably reducing the risk of the first substrate 1 and the second substrate 2 coming off the sheath 4. The recess 60 is also shown in Figure 7, etc. 【0032】 As shown in Figures 12 to 15, when the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, a first outer shaft portion 71 may be provided on the outside of the first substrate 1 in the first direction D1, which serves as the axis of rotation of the first substrate 1 relative to the sheath 4. A second outer shaft portion 72 may be provided on the outside of the second substrate 2 in the first direction D1, which serves as the axis of rotation of the second substrate 2 relative to the sheath 4. An inner shaft portion 73 may be provided on the inside of the first substrate 1 and the second substrate 2 in the first direction D1, which serves as the axis of rotation between the first substrate 1 and the second substrate 2. In Figures 12 to 15, circles are drawn at the positions of the first outer shaft portion 71, the second outer shaft portion 72, and the inner shaft portion 73. In the ring binder of this embodiment, with respect to the first direction D1, the inner shaft portion 73 is positioned closer to the first outer shaft portion 71 than the center position CP between the first outer shaft portion 71 and the second outer shaft portion 72. In other words, in the ring binder of this embodiment, the inner shaft portion 73 is positioned offset from the center position CP toward the first substrate 1. 【0033】 At least one first projection 10 is provided on the outer surface of the first substrate 1 in the first direction D1. In the illustrated configuration, two first projections 10 are provided on the first substrate 1 in the second direction D2, spaced apart from each other. The first projection 10 on the back side (lower side in the figure) of the first substrate 1 abuts against the sheath 4. As shown in Figures 12 to 15, when switching between the closed and open states, the outer surface of the first projection 10 abutting against the sheath 4 slides along the inner surface of the sheath 4, causing the first substrate 1 to rotate relative to the sheath 4. In the cross-sections shown in Figures 12 to 15, the first substrate 1 rotates counterclockwise when switching from the closed state in Figures 12 and 14 to the open state in Figures 13 and 15. In this configuration, the position of the first outer shaft portion 71 is the center of curvature of the outer surface of the first projection 10 abutting against the sheath 4 in a cross-section perpendicular to the third direction D3. If the center of curvature of the outer surface of the first projection 10 is not determined, the relative rotation of the first substrate 1 with respect to the sheath 4 is observed, and the position of the center of that rotation is taken as the position of the first outer shaft portion 71. 【0034】 Similarly, at least one second projection 20 is provided on the outside of the second substrate 2 in the first direction D1. In the illustrated configuration, two second projections 20 are provided on the second substrate 2 in the second direction D2, spaced apart from each other. The second projection 20 on the back side (lower side in the figure) of the second substrate 2 abuts against the sheath 4. When switching between the closed and open states as shown in Figures 12 to 15, the outer surface of the second projection 20 abutting against the sheath 4 slides along the inner surface of the sheath 4, causing the second substrate 2 to rotate relative to the sheath 4. In the cross-sections shown in Figures 12 to 15, the second substrate 2 rotates clockwise when switching from the closed state in Figures 12 and 14 to the open state in Figures 13 and 15. In this configuration, the position of the second outer shaft portion 72 is the center of curvature of the outer surface of the second projection 20 abutting against the sheath 4 in a cross-section perpendicular to the third direction D3. If the center of curvature of the outer surface of the second projection 20 is not determined, the relative rotation of the second substrate 2 with respect to the sheath 4 is observed, and the position of the center of that rotation is taken as the position of the second outer shaft portion 72. 【0035】 When viewed in a cross-section perpendicular to the third direction D3, the first substrate 1 has a first body and the second substrate 2 has a second body. The first body and the second body may have a substantially rectangular cross-sectional shape. As shown in Figures 12 and 14, when in the closed state, the inner surfaces of the first body and the second body are close to each other. At this time, the inner surfaces of the first body and the second body are in contact at least at the back end (lower end in the figures) with respect to the second direction D2. Also, as shown in Figures 13 and 15, when in the open state, the first substrate 1 and the second substrate 2 rotate relative to each other so that the front ends (upper ends in the figures) of the inner surfaces of the first body and the second body move away from each other, while maintaining the state in which the back ends (lower ends in the figures) of the inner surfaces of the first body and the second body are in contact with each other. In this configuration, the position of the inner shaft portion 73 is the position of the back ends of the inner surfaces of the first body and the second body. 【0036】 The first substrate 1 is provided with at least one first flange portion 11 that fits under the back surface of the second substrate 2. The second substrate 2 is provided with at least one second flange portion 21 that is located in a third direction D3, away from the first flange portion 11, and fits under the back surface of the first substrate 1. These first flange portion 11 and second flange portion 21 are located in a third direction D3, away from the projection portion 5. When viewed in cross-section, these first flange portion 11 and second flange portion 21 are formed as roughly triangular projections that protrude from the back edges of the inner surfaces of the first and second bodies. As shown in Figures 12 and 13, when the first substrate 1 and the second substrate 2 rotate relative to each other, the second flange portion 21 supports the back edge of the inner surface of the first body, and the state in which the back edge of the inner surface of the first body abuts against the upper surface of the second flange portion 21 is maintained. Similarly, as shown in Figures 14 and 15, when the first substrate 1 and the second substrate 2 rotate relative to each other, the first flange portion 11 supports the back end of the inner surface of the second body, and the state in which the back end of the inner surface of the second body abuts against the upper surface of the first flange portion 11 is maintained. The first flange portion 11 and the second flange portion 21 constitute a rotation axis portion that serves as the axis of relative rotation between the first substrate 1 and the second substrate 2. The position of the inner axis portion 73 may be the position of the upper surface of the first flange portion 11 and the second flange portion 21. 【0037】 The first flange portion 11 and the second flange portion 21 contact the back surfaces of the second substrate 2 and the first substrate 1, thereby restricting the relative rotation angle between the first substrate 1 and the second substrate 2. Figure 13 shows how the surface of the second flange portion 21 contacts the back surface of the first substrate 1 to restrict the rotation angle, and Figure 15 shows how the surface of the first flange portion 11 contacts the back surface of the second substrate 2 to restrict the rotation angle. 【0038】 In this embodiment, the width of the first substrate 1 is narrower than the width of the second substrate 2, so the inner shaft portion 73 is positioned closer to the first outer shaft portion 71 than the center position CP between the first outer shaft portion 71 and the second outer shaft portion 72. From this viewpoint, the first substrate 1 may be called a narrow substrate and the second substrate 2 may be called a wide substrate. 【0039】 The embodiments shown in Figures 16(A) and (B) are embodiments in which each part is designed under the same conditions, except for the position of the inner shaft portion 73 in the first direction D1. That is, in the embodiments shown in Figures 16(A) and (B), the amount of displacement between the height positions of the first outer shaft portion 71 and the second outer shaft portion 72 and the height position of the inner shaft portion 73 is the same. However, in the embodiment shown in Figure 16(A), the inner shaft portion 73 is positioned closer to the first outer shaft portion 71 than the center position CP, similar to the ring binders in Figures 12 to 15, whereas in the embodiment shown in Figure 16(B), unlike the ring binders in Figures 12 to 15, the inner shaft portion 73 is positioned at the center position CP. 【0040】 As shown in Figures 16(A) and (B), by positioning the inner shaft portion 73 closer to the first outer shaft portion 71 than the center position CP between the first outer shaft portion 71 and the second outer shaft portion 72 with respect to the first direction D1, as in Figure 16(A), the gap between the tips of the divided ring portion 3 can be widened compared to the case where the inner shaft portion 73 is positioned closer to the center position CP, as in Figure 16(B). This is thought to be because the first substrate 1 (narrow substrate) rotates more significantly as the inner shaft portion 73 is offset towards the first substrate 1. In other words, with respect to the first direction D1, the ring-type binder of this embodiment is positioned closer to the first outer shaft portion 71 than the center position CP between the first outer shaft portion 71 and the second outer shaft portion 72, so that the gap between the tips of the divided ring portion 3 can be widened while avoiding setting the height of the inner shaft portion 73 too low. Another way to widen the gap between the ends of the dividing ring portion 3 is to increase the radius of curvature of the dividing ring portion 3. However, with the ring binder of this embodiment, the gap between the ends of the dividing ring portion 3 can be widened without increasing the radius of curvature of the dividing ring portion 3. 【0041】 Note that in Figure 16, reference numerals have been omitted for clarity. Also, the shape of the divided ring portion 3 in the embodiment shown in Figure 16 differs from that in the embodiments shown in Figures 12 to 15. However, even with the difference in the shape of the divided ring portion 3, the offset of the inner shaft portion 73 still allows for a wider gap between the tips of the divided ring portion 3. 【0042】 As shown in Figures 10 and 11, when viewed in cross-section at the position of the protrusion 5, the inner shaft portion 73 may be located inside the protrusion 5. That is, the first substrate 1 and the second substrate 2 rotate relative to each other around the inner shaft portion 73, but the surface of the protrusion 5 does not need to have a contact point that serves as the axis of rotation for the first substrate 1 and the second substrate 2. 【0043】 The first surface 51 may be positioned closer to the sheath 4 than the inner shaft portion 73 (lower in the figure) when in the closed state. If the protrusion 5 were made thicker than in the illustrated configuration, and the first surface 51 were positioned further away from the sheath 4 than the inner shaft portion 73, the thickness of the portion 62 on which the receiving surface 61 is provided would be reduced in at least the other of the first substrate 1 and the second substrate 2, and the strength of the portion 62 on which the receiving surface 61 is provided would decrease. As described above, by positioning the first surface 51 closer to the sheath 4 than the inner shaft portion 73, the thickness and strength of the portion 62 on which the receiving surface 61 is provided can be ensured. 【0044】 As shown in Figure 3, the surface of the sheath 4 may be provided with a relief groove 42 extending in the third direction D3. The surface of the sheath 4 may be the surface of the back plate portion 40 facing the back surfaces of the first substrate 1 and the second substrate 2. The relief groove 42 may extend from one end to the other of the sheath 4 in the third direction D3, and may be open at both ends in the third direction D3. The relief groove 42 is recessed relative to its surroundings. As shown in Figure 10, when the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross section perpendicular to the third direction D3, in the closed state, the extending region 500 of the part of the protruding portion 5 that protrudes the most toward the sheath 4 may be included in the extending region 420 of the relief groove 42 in the first direction D1. This makes it possible to reduce the height of the ring-type fastener in the second direction D2 while ensuring the thickness of the protruding portion 5. The part of the protruding portion 5 that protrudes the most toward the sheath 4 is the part that protrudes the most toward the back side in the second direction D2. As shown in Figure 10, when lines are drawn in the second direction D2 from both ends of the part of the protruding portion 5 that protrudes the most towards the sheath 4, the line segment extending in the first direction D1 between these lines (arrow in the figure) is defined as the extended region 500. As shown in Figure 10, the points where the recess begins relative to the surroundings are defined as both ends of the relief groove 42 in the first direction D1, and when lines are drawn in the second direction D2 from both ends of the relief groove 42, the line segment extending in the first direction D1 between these lines (arrow in the figure) is defined as the extended region 420. In Figure 10, the arrows indicating the extended region 500 and the arrows indicating the extended region 420 are shown offset from each other, but when they are shifted in parallel in the second direction D2, if the extended region 500 is included within the range of the extended region 420, it is determined that the extended region 500 is included in the extended region 420. 【0045】 As described above, the first flange portion 11 and the second flange portion 21 constitute a rotational shaft portion that serves as the axis of relative rotation between the first substrate 1 and the second substrate 2. As shown in Figures 12 and 14, when the first substrate 1, the second substrate 2 and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, in the closed state, the extended regions 110 and 210 of the part of the rotational shaft portion that protrudes furthest toward the sheath 4 may be included in the extended region 420 of the relief groove 42 that protrudes furthest toward the first direction D1. This makes it possible to reduce the height of the ring-type fastener in the second direction D2, even if the rotational shaft portion requires a certain dimension in the second direction D2. As shown in Figures 12 and 14, when lines are drawn from both ends of the part of the rotational shaft portion that protrudes furthest toward the sheath 4 in the second direction D2, the line segments (arrows in the figures) extending in the first direction D1 between these lines are defined as the extended regions 110 and 210. In Figures 12 and 14, the arrows indicating the extended regions 110 and 210 and the arrow indicating the extended region 420 are shown offset from each other. When these are translated in parallel in the second direction D2, if the extended regions 110 and 210 are included within the range of the extended region 420, it is determined that the extended regions 110 and 210 are included in the extended region 420. 【0046】 This first embodiment includes the following: A first substrate 1 and a second substrate 2 are arranged side by side in a first direction D1, Multiple divided ring portions 3 are provided on the surfaces of the first substrate 1 and the second substrate 2, A longitudinal sheath 4 is positioned on the back side of the first substrate 1 and the second substrate 2, and holds the first substrate 1 and the second substrate 2 by sandwiching them from the outside in the first direction D1 and pressing them against each other. Equipped with, The rotational displacement of the first substrate 1 and the second substrate 2 under the action of the pressing force of the sheath 4 causes the state to switch between a closed state in which the respective tips of the divided ring portion 3 are close to each other and an open state in which the respective tips of the divided ring portion 3 are separated from each other. A ring binder, The first substrate 1 and the second substrate 2 are provided with a rotating shaft portion that serves as the axis of relative rotation between the first substrate 1 and the second substrate 2. When the front-to-back direction of the first substrate 1 and the second substrate 2 that is perpendicular to the first direction D1 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3, The surface of the sheath 4 is provided with relief grooves 42 extending in the third direction D3. When the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, in the closed state, the extended regions 110 and 210 of the part of the rotating shaft that protrudes most towards the sheath 4, relating to the first direction D1, are included in the extended region 420 of the relief groove 42 relating to the first direction D1. Ring binder. 【0047】 The first substrate 1, the second substrate 2, and the sheath 4 may be made of a material containing resin. Various materials can be used as the material containing resin. As the material containing resin, petroleum-derived resins such as polycarbonate may be used, but biomass plastics may also be used. Biomass plastics may refer to non-petroleum-derived resins such as those derived from paper or plants. The material containing resin may include materials derived from paper, corn, eggshells, or seashells. 【0048】 Embodiment 2. Figure 17 is a perspective view showing a ring binder according to Embodiment 2 of the present invention, and Figure 18 is an enlarged perspective view showing region XVIII of Figure 17. Figure 19 is a cross-sectional view of the ring binder shown in Figure 17 at the position of the protruding portion 5, and Figure 20 is a cross-sectional view of the ring binder shown in Figure 19 in the open state. Figure 21 is a cross-sectional view of the ring binder shown in Figure 17 at the position of the rotating shaft, and Figure 22 is a cross-sectional view of the ring binder shown in Figure 21 in the open state. 【0049】 In Embodiment 1, it was explained that a recess 60 into which the protrusion 5 fits when in the open state (see Figures 11 and 6) may be provided on at least the other of the first substrate 1 and the second substrate 2 (the second substrate 2 in Figures 10 and 11). As shown in Figures 19 and 20, the protrusion 5 may be provided on at least one of the first substrate 1 and the second substrate 2, and an opening 63 into which the protrusion 5 fits when in the open state (see Figure 20) may be provided on at least the other of the first substrate 1 and the second substrate 2 instead of the recess 60. A receiving surface 61 may also be provided on the opening 63. Whether to provide a recess 60 or an opening 63 should be determined according to the amount of protrusion of the protrusion 5. 【0050】 In Embodiment 1, it was explained that a relief groove 42 extending in the third direction D3 is provided on the surface of the sheath 4, and the projection 5 may enter into the relief groove 42. However, as shown in Figures 17 to 22, at least one relief hole 43 is provided in the sheath 4, and the projection 5 may enter into the relief hole 43. As shown in Figure 17, a plurality of relief holes 43 may be provided at intervals in the third direction D3. The relief hole 43 shown penetrates the sheath 4. However, the relief hole 43 may not penetrate the sheath 4, but may be formed as a recessed area relative to its surroundings. 【0051】 When the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, in the closed state, the extended region 500 of the part of the protruding portion 5 that protrudes most towards the sheath 4 may be included in the extended region 430 of the relief hole 43 in the first direction D1. This makes it possible to reduce the height of the ring-type fastener in the second direction D2 while ensuring the thickness of the protruding portion 5. As shown in Figure 19, when lines are drawn from both ends of the relief hole 43 in the first direction D1 to the second direction D2, the line segment extending in the first direction D1 between these lines (arrow in the figure) is defined as the extended region 430. In the illustrated embodiment, the outer edge of the relief hole 43 on the surface of the sheath 4 is formed by a 90-degree angle, but when the outer edge of the relief hole 43 on the surface of the sheath 4 is chamfered, the points where it begins to recess relative to the surroundings are defined as both ends of the relief hole 43 in the first direction D1. The protruding portion 5 may enter the relief hole 43 when the ring binder is closed. 【0052】 In Embodiment 1, the first flange portion 11 and the second flange portion 21 were described as constituting a rotating shaft portion that serves as the axis of relative rotation between the first substrate 1 and the second substrate 2. However, as shown in Figures 21 and 22, the shaft body 80 and the bearing body 81 may constitute the rotating shaft portion. The shaft body 80 is provided on at least one of the first substrate 1 and the second substrate 2, and the bearing body 81 is provided on at least the other of the first substrate 1 and the second substrate 2, with the shaft body 80 inserted into the bearing body 81, and relative rotation between the first substrate 1 and the second substrate 2 may occur with the shaft body 80 as the axis. The shaft body 80 may be a cylindrical portion, and the bearing body 81 has an arcuate surface inside that corresponds to the outer surface of the shaft body 80. In the cross-sections shown in Figures 21 and 22, the bearing body 81 is provided on the first substrate 1, and the shaft body 80 is provided on the second substrate 2. In cross-sections at different locations, conversely, the bearing body 81 may be provided on the second substrate 2 and the shaft body 80 on the first substrate 1. In such an embodiment, the position of the inner shaft portion 73 is the position of the center point of the shaft body 80 in a cross-section perpendicular to the third direction D3. If the center point of the shaft body 80 is not certain, the relative rotation of the first substrate 1 and the second substrate 2 is observed, and the position of the center of that rotation is taken as the position of the inner shaft portion 73. 【0053】 As shown in Figure 21, when the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, in the closed state, the extended region 82 of the part of the rotating shaft that protrudes the most toward the sheath 4 may be included in the extended region 430 of the relief hole 43 that protrudes the most toward the first direction D1. This allows the height of the ring-type fastener in the second direction D2 to be reduced even if the rotating shaft requires a certain amount of dimension in the second direction D2. Typically, the part of the rotating shaft that protrudes the most toward the sheath 4 is provided on the outer surface of the bearing body 81. The rotating shaft may enter the interior of the relief hole 43. 【0054】 This second embodiment includes the following. The other configurations are the same as in the first embodiment. A first substrate 1 and a second substrate 2 are arranged side by side in a first direction D1, Multiple divided ring portions 3 are provided on the surfaces of the first substrate 1 and the second substrate 2, A longitudinal sheath 4 is positioned on the back side of the first substrate 1 and the second substrate 2, and holds the first substrate 1 and the second substrate 2 by sandwiching them from the outside in the first direction D1 and pressing them against each other. Equipped with, The rotational displacement of the first substrate 1 and the second substrate 2 under the action of the pressing force of the sheath 4 causes the state to switch between a closed state in which the respective tips of the divided ring portion 3 are close to each other and an open state in which the respective tips of the divided ring portion 3 are separated from each other. A ring binder, The first substrate 1 and the second substrate 2 are provided with a rotating shaft portion that serves as the axis of relative rotation between the first substrate 1 and the second substrate 2. The sheath 4 is provided with a relief hole 43. When the first substrate 1, the second substrate 2, and the sheath 4 are viewed in a cross-section perpendicular to the third direction D3, in the closed state, the extended region 82 of the part of the rotation axis that protrudes most towards the sheath 4, relating to the first direction D1, is included in the extended region 430 of the relief hole 43 relating to the first direction D1. Ring binder. 【0055】 Although preferred embodiments of the present invention have been described in detail above with reference to the attached drawings, the present invention is not limited to these examples. It is clear to any person with ordinary skill in the art to which the present invention belongs that various modifications or alterations can be conceived within the scope of the technical idea described in the claims, and these are also understood to fall within the technical scope of the present invention. [Explanation of symbols] 【0056】 1: First board 2: Second board 3: Split ring section 4: Sheath body 42: Escape ditch 43: Escape Hole 5:Protrusion 51: 1st surface 60: recess 63 :Aperture 71: First outer shaft part 72: Second outer axis section 73: Inner shaft section 81: Axon receptor

Claims

[Claim 1] A first substrate and a second substrate are arranged side by side in a first direction, Multiple divided ring portions provided on the surfaces of the first substrate and the second substrate, A longitudinal sheath is positioned on the back side of the first substrate and the second substrate, and holds the first substrate and the second substrate by sandwiching them from the outside in the first direction and pressing them against each other. Equipped with, The rotational displacement of the first and second substrates under the action of the pressing force of the sheath allows the state to be switched between a closed state in which the respective tips of the divided ring portions are close to each other and an open state in which the respective tips of the divided ring portions are separated from each other. A ring binder, At least one of the back surfaces of the first substrate and the second substrate is provided with a projection that extends beneath at least the other back surface, and the projection is configured to abut against at least the other of the first substrate and the second substrate in the open state, thereby restricting the rotational displacement of the first substrate and the second substrate. The surface of the protruding portion is provided with a first surface that extends parallel to the first direction in the closed state. Ring binder. [Claim 2] At least the other of the first substrate and the second substrate is provided with a recess or opening into which the protruding portion fits when the substrate is open. The recess or opening is provided with a receiving portion that, in the closed state, is inclined with respect to the first direction such that it moves from the outside to the inside of at least the other of the first substrate and the second substrate toward the back side of at least the other of the first substrate and the second substrate, and that at least partially abuts against the first surface in the open state. The ring binder according to claim 1. [Claim 3] When the front-back direction of the first and second substrates, which is perpendicular to the first direction, is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, an inner shaft portion is provided on the inside of the first substrate and the second substrate in the first direction, which serves as the axis of relative rotation between the first substrate and the second substrate. When viewed in cross-section at the location of the protruding portion, the inner shaft portion is located inside the protruding portion. The ring binder according to claim 1. [Claim 4] The first surface is positioned closer to the sheath than the inner shaft portion. The ring binder according to claim 3. [Claim 5] When the front-back direction of the first and second substrates, which is perpendicular to the first direction, is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, The surface of the sheath is provided with relief grooves extending in the third direction, When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, in the closed state, the extension region of the portion of the protrusion that protrudes most towards the sheath side in the first direction is included in the extension region of the relief groove in the first direction. A ring binder according to any one of claims 1 to 4. [Claim 6] The first substrate and the second substrate are provided with a rotating shaft portion that serves as the axis of rotation between the first substrate and the second substrate, When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, in the closed state, the extension region of the portion of the rotating shaft that protrudes most towards the sheath in the first direction is included in the extension region of the relief groove in the first direction. The ring binder according to claim 5. [Claim 7] When the front-back direction of the first and second substrates, which is perpendicular to the first direction, is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction, The aforementioned sheath is provided with at least one escape hole, When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, in the closed state, the extension region of the portion of the protrusion that protrudes most towards the sheath side in the first direction is included in the extension region of the relief hole in the first direction. A ring binder according to any one of claims 1 to 4. [Claim 8] The first substrate and the second substrate are provided with a rotating shaft portion that serves as the axis of rotation between the first substrate and the second substrate, When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, in the closed state, the extension region of the portion of the rotating shaft that protrudes most towards the sheath in the first direction is included in the extension region of the relief hole in the first direction. The ring binder according to claim 7. [Claim 9] The first substrate, the second substrate, and the sheath are made of a material including a resin material. A ring binder according to any one of claims 1 to 4. [Claim 10] The front-back direction of the first and second substrates, which is perpendicular to the first direction, is defined as the second direction, and the direction perpendicular to the first and second directions is defined as the third direction. When the first substrate, the second substrate, and the sheath are viewed in a cross-section perpendicular to the third direction, On the outer side of the first substrate in the first direction, a first outer shaft portion is provided, which serves as the axis of rotation of the first substrate relative to the sheath. On the outer side of the second substrate in the first direction, a second outer shaft portion is provided, which serves as the axis of rotation of the second substrate relative to the sheath. An inner shaft portion is provided on the inside of the first substrate and the second substrate in the first direction, which serves as the axis of rotation between the first substrate and the second substrate. With respect to the first direction, the inner shaft portion is positioned closer to the first outer shaft portion than the center position between the first outer shaft portion and the second outer shaft portion. A ring binder according to any one of claims 1 to 4.

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