One-way braking hinge

Abstract

Provided is a one-way damping hinge that allows self-alignment of a shaft and a one-way clutch. A one-way damping hinge (10) comprises: a first leaf (1); a shaft (3) rotatably supported by the first leaf (1); at least one resistance part (4) resisting rotation of the shaft (3); a second leaf (2) rotatably connected to the shaft (3); a one-way clutch (12) into which the shaft (3) is inserted; and a position adjustment member (11) to which the one-way clutch (12) is fixed. The position adjustment member (11) is connected to the second leaf (2) in a position-adjustable manner.

Description

[Technical field]

[0001] The present invention relates to a one-way braking hinge that allows a rotating body such as a lid or door to rotate freely in an opening direction and brakes it in a closing direction. [Background technology]

[0002] Machines, buildings, furniture, electrical appliances, housings, etc. contain rotating bodies such as lids, doors, windows, etc. that open and close in the vertical or horizontal direction. These rotating bodies are made rotatable by hinges. The hinge includes a first leaf, a second leaf, and a shaft that rotatably connects the first leaf and the second leaf. By connecting the first leaf to the main body and the second leaf to the rotating body, the rotating body can be rotated relative to the main body.

[0003] Conventional hinges cannot brake the rotor (i.e., make the rotor close slowly or stop the rotor at any opening angle), so the closing action of the rotor is performed with impact.

[0004] To prevent this, Patent Document 1 discloses a one-way braking hinge that allows a rotor to rotate freely in the opening direction and brakes it in the closing direction. This one-way braking hinge is equipped with a one-way clutch into which a shaft is inserted. The one-way clutch contains a plurality of rolling elements such as needles and rollers in each of a plurality of wedge-shaped spaces formed between the cam surface of the outer cylinder and the shaft.

[0005] With this one-way braking hinge, when the rotor rotates in the opening direction, the rolling element moves to the deep groove side of the cam surface, and the one-way clutch rotates freely relative to the shaft. This allows the rotor fixed to the one-way clutch to rotate freely in the opening direction. On the other hand, when the rotor rotates in the closing direction, the rolling element enters the small diameter side of the cam surface, and the shaft rotates together with the one-way clutch. When the shaft rotates, the resistance portion resists the rotation of the shaft, braking the rotor. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility model registration No. 3152248 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in conventional one-way braking hinges, if the shaft and one-way clutch are not properly aligned, the durability of the one-way clutch decreases. If the shaft and one-way clutch are misaligned, some of the wedge-shaped spaces become narrow, causing excessive loads to act on the rolling elements. To prevent this, it is necessary to improve the installation accuracy of the shaft and one-way clutch.

[0008] The present invention has been made in consideration of the above problems, and has an object to provide a one-way braking hinge that is capable of automatic alignment between a shaft and a one-way clutch. [Means for solving the problem]

[0009] In order to solve the above problems, one aspect of the present invention provides a spring that includes a first leaf, a shaft rotatably supported by the first leaf, at least one resistance portion that resists rotation of the shaft, a second leaf rotatably connected to the shaft, a one-way clutch into which the shaft is inserted, and a position adjustment member to which the one-way clutch is fixed, wherein the position adjustment member is connected to the second leaf so as to be position-adjustable. The position adjustment member has a groove formed therein into which the second leaf is inserted. It is a one-way braking hinge. Another aspect of the present invention is a one-way braking hinge comprising a first leaf, a shaft rotatably supported on the first leaf, at least one resistance portion that resists rotation of the shaft, a second leaf rotatably connected to the shaft, a one-way clutch into which the shaft is inserted, and a position adjustment member to which the one-way clutch is fixed, wherein the position adjustment member is connected to the second leaf so as to be position-adjustable, a groove is formed in one of the position adjustment member or the second leaf into which the other of the position adjustment member or the second leaf fits, and the width of the back of the groove is greater than the width of the entrance of the groove. Yet another aspect of the present invention is a one-way braking hinge comprising a first leaf, a shaft rotatably supported on the first leaf, at least one resistance portion that resists rotation of the shaft, a second leaf rotatably connected to the shaft, a one-way clutch into which the shaft is inserted, and a position adjustment member to which the one-way clutch is fixed, wherein the position adjustment member is connected to the second leaf so as to be position-adjustable, a groove is formed in one of the position adjustment member or the second leaf into which the other of the position adjustment member or the second leaf fits, and the width of both axial ends of the groove is greater than the width of the axial center of the groove. Yet another aspect of the present invention is a one-way braking hinge comprising a first leaf, a shaft rotatably supported on the first leaf, at least one resistance portion resisting rotation of the shaft, a second leaf rotatably connected to the shaft, a one-way clutch into which the shaft is inserted, and a position adjustment member to which the one-way clutch is fixed, wherein the position adjustment member is connected to the second leaf so as to be position-adjustable, and one of the position adjustment member or the second leaf is formed with a groove into which the other of the position adjustment member or the second leaf fits, and in order to limit axial movement of the position adjustment member relative to the second leaf, a convex portion or concave portion is formed on the one of the first leaf, and an engaging concave portion or engaging convex portion that fits into the convex portion or concave portion is formed on the other of the first leaf. Yet another aspect of the present invention is a one-way braking hinge comprising a first leaf, a shaft rotatably supported on the first leaf, at least one resistance portion resisting rotation of the shaft, a second leaf rotatably connected to the shaft, a one-way clutch into which the shaft is inserted, and a position adjustment member to which the one-way clutch is fixed, wherein the position adjustment member is connected to the second leaf so as to be position-adjustable, a pair of resistance portions are attached to a pair of tubular portions of the first leaf, and the one-way clutch is disposed between the pair of tubular portions. Effect of the Invention

[0010] According to the present invention, automatic alignment of the shaft and the one-way clutch is possible. [Brief description of the drawings]

[0011] [Figure 1] 1 is an external perspective view of a one-way braking hinge according to a first embodiment of the present invention; [Diagram 2] 2A and 2B are diagrams showing an example in which the one-way braking hinge of the present embodiment is attached to a housing (FIG. 2A shows the closed position of the cover, and FIG. 2B shows the position of the cover halfway open). [Diagram 3] 1 is an exploded perspective view of a one-way braking hinge according to the present embodiment (as viewed from the second leaf side). FIG. [Figure 4] 1 is an exploded perspective view of a one-way braking hinge according to the present embodiment (as viewed from a first leaf side). FIG. [Diagram 5] 10 is a front view (as viewed from the second leaf side) of a position adjustment member of the one-way braking hinge of the embodiment. FIG. [Figure 6] 6(a) is a plan view, FIG. 6(b) is a cross-sectional view taken along line AA in FIG. 6(a), and FIG. 6(c) is a cross-sectional view taken along line BB in FIG. 6(a). [Figure 7] 7A and 7B are cross-sectional views of a one-way clutch of a one-way braking hinge of this embodiment (FIG. 7A shows the outer ring rotating in a clockwise direction, and FIG. 7B shows the outer ring rotating in a counterclockwise direction). [Figure 8] 8A and 8B are cross-sectional views perpendicular to the axis of the position adjustment member of the one-way braking hinge of this embodiment (FIGS. 8(a1) and (a2) show the position adjustment member when tilted counterclockwise, FIG. 8(b1) and (b2) show the neutral position of the position adjustment member, and FIG. 8(c1) and (c2) show the position adjustment member when tilted clockwise). [Figure 9] 9(b) shows the neutral position of the position adjustment member of the one-way braking hinge of this embodiment, FIG. 9(a) shows the position adjustment member when tilted clockwise, and FIG. 9(c) shows the position adjustment member when tilted counterclockwise. [Figure 10] Figures 10(a1) and (a2) show a modified example in which a groove is provided on the second leaf side, Figures 10(b1) and (b2) show a modified example of the groove in the position adjustment member, and Figures 10(c1) and (c2) show another modified example of the groove in the position adjustment member. [Figure 11]FIG. 11 is an exploded perspective view of a one-way braking hinge according to a second embodiment of the present invention. [Figure 12] 12A and 12B are diagrams showing an example in which a one-way braking hinge according to a second embodiment of the present invention is attached to a housing (FIG. 12A shows the cover in the closed position, and FIG. 12B shows the cover in the open position). [Figure 13] FIG. 13 is an exploded perspective view of a one-way braking hinge according to a third embodiment of the present invention. [Figure 14] 14A and 14B are diagrams showing an example in which a one-way braking hinge according to a third embodiment of the present invention is attached to a housing (FIG. 14A shows the cover in the closed position, and FIG. 14B shows the cover in the open position). [Figure 15] FIG. 15(a) is an exploded perspective view of a one-way braking hinge according to a fourth embodiment of the present invention, and FIG. 15(b) is a cross-sectional view of a damper resistor portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a one-way braking hinge according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the one-way braking hinge according to the present invention can be embodied in various forms and is not limited to the embodiments described in the present specification. The present embodiment is provided with the intention of enabling those skilled in the art to fully understand the invention by fully disclosing the specification. (First embodiment)

[0013] FIG. 1 is an external perspective view of a one-way braking hinge according to a first embodiment of the present invention. The one-way braking hinge 10 of this embodiment includes a first leaf 1 in which a plurality of mounting holes are formed, and a second leaf 2 in which a plurality of mounting holes are formed. The first leaf 1 and the second leaf 2 are substantially rectangular in plan view. The shapes of the first leaf 1 and the second leaf 2 are not particularly limited. The second leaf 2 is rotatable about an axis 3 relative to the first leaf 1. When the second leaf 2 rotates in an opening direction relative to the first leaf 1, the second leaf 2 rotates freely. On the other hand, when the second leaf 2 rotates in a closing direction relative to the first leaf 1, the rotation of the second leaf 2 is braked. In some cases, when the second leaf 2 rotates in a closing direction relative to the first leaf 1, the second leaf 2 rotates freely, and when the second leaf 2 rotates in an opening direction, the rotation of the second leaf 2 may be braked.

[0014] FIG. 2 shows an example in which the one-way braking hinge 10 of this embodiment is attached to a housing. FIG. 2(a) shows the closed position of the lid body d, and FIG. 2(b) shows a position in the middle of opening the lid body d. The first leaf 1 is attached to the main body b. The second leaf 2 is attached to the lid body d as a rotating body. The lid body d rotates freely in the opening direction. On the other hand, the rotation of the lid body d in the closing direction is braked, and the lid body d stops at any open position. Instead of the lid body d stopping at any open position, the lid body d may be made to close slowly to the closed position.

[0015] 3 and 4 are exploded perspective views of the one-way braking hinge 10 of this embodiment. FIG. 3 is an exploded perspective view seen from the second leaf 2 side, and FIG. 4 is an exploded perspective view seen from the first leaf 1 side. As shown in FIG. 3, the first leaf 1 has a pair of tubular parts 1a at its end on the second leaf 2 side. The tubular parts 1a are formed, for example, by bending an extension part of the first leaf 1 into a curled shape. A sleeve-shaped friction resistance part 4 made of resin as a resistance part is non-rotatably fitted into the tubular parts 1a. A shaft 3 is rotatably fitted into the friction resistance part 4. The friction resistance part 4 is fixed to the first leaf 1 non-rotatably. The shaft 3 is rotatable around its center line 3a relative to the friction resistance part 4. The shaft 3 is supported horizontally by the tubular part 1a of the first leaf 1.

[0016] The friction resistance part 4 includes a cylindrical main body part 4a and a flange part 4b formed at one end of the main body part 4a. The main body part 4a of the friction resistance part 4 is press-fitted into the cylindrical part 1a of the first leaf 1. The main body part 4a of the friction resistance part 4 is formed with a slit 4c for facilitating press-fitting into the cylindrical part 1a. As shown in FIG. 4, the flange part 4b of the friction resistance part 4 is provided with an axial projection 4d extending therefrom, which fits into a gap g formed at the tip of the cylindrical part 1a of the first leaf 1. A rotation prevention member 7 is fixed to the first leaf 1 by a fastening member 6 such as a crimping pin. The rotation prevention member 7 is formed with a projection 7a which fits into a hole in the cylindrical part 1a and presses the friction resistance part 4. The rotation prevention member 7 fixes the friction resistance part 4 to the cylindrical part 1a of the first leaf 1 so as not to rotate.

[0017] As shown in Fig. 3, the shaft 3 is press-fitted into the frictional resistance portion 4. The outer peripheral surface 3b of the shaft 3 and the inner peripheral surface 4e of the frictional resistance portion 4, which are in contact with each other, form a friction surface. The frictional resistance portion 4 resists the rotation of the shaft 3 and brakes the rotation of the shaft 3.

[0018] The frictional resistance portion 4 may be composed of a curved portion having an arc-shaped cross section and extensions extending outward from both ends of the curved portion. A bolt may be passed through the extensions, and the curved portion of the frictional resistance portion 4 may be tightened around the shaft 3 by means of an adjustment nut that is screwed onto the bolt.

[0019] The second leaf 2 comprises a substantially rectangular main body 2a and bearings 2b formed parallel to each other on both axial ends of the main body 2a and protruding toward the first leaf 1. The second leaf 2 is rotatably connected to the shaft 3 by fitting the bearings 2b of the second leaf 2 onto the shaft 3. A resin flanged washer 8 is fitted into the hole 2c of the bearing 2b (see FIG. 6(c)). The bearing 2b is sandwiched between the flanged washer 8 and the flanged washer 8 of the friction resistance portion 4. A retaining ring 9 that prevents the flanged washer 8 and the shaft 3 from coming off are attached to the shaft 3.

[0020] Reference numeral 12 in Fig. 3 denotes a one-way clutch. A shaft 3 is inserted into the one-way clutch 12. As shown in Fig. 7(a), the one-way clutch 12 includes an outer ring 21 having a plurality of cam surfaces 21a formed on its inner surface, rolling elements 22 such as needles or rollers housed in a wedge-shaped space between the cam surface 21a of the outer ring 21 and the shaft 3, and a spring 23 that biases the rolling elements 22 toward the shallow groove side of the wedge-shaped space. As shown in Fig. 7(a), when the outer ring 21 rotates clockwise relative to the shaft 3, the rolling elements 22 move from the shallow groove side to the deep groove side of the cam surface 21a, and the rolling elements 22 move away from the cam surface 21a, allowing the outer ring 21 to rotate freely relative to the shaft 3. On the other hand, as shown in FIG. 7(b), when the outer ring 21 rotates counterclockwise relative to the shaft 3, the spring force of the spring 23 causes the rolling element 22 to move toward the shallow groove side of the cam surface 21a, and the wedge action between the cam surface 21a and the shaft 3 causes the shaft 3 to rotate together with the outer ring 21.

[0021] As shown in FIG. 3, the one-way clutch 12 is fixed to the position adjustment member 11. A clutch accommodating hole 11a is formed in the position adjustment member 11. The outer ring 21 of the one-way clutch 12 is press-fitted into the clutch accommodating hole 11a of the position adjustment member 11. The axial length of the one-way clutch 12 is slightly shorter than the axial length of the position adjustment member 11 (see FIG. 6(b)). The position adjustment member 11 is disposed between a pair of tubular portions 1a of the first leaf 1. A small gap is formed between the position adjustment member 11 and the tubular portion 1a (see FIG. 6(a)).

[0022] The position adjustment member 11 is connected to the second leaf 2 so that its position can be adjusted. When the second leaf 2 rotates in the opening direction, the one-way clutch 12 rotates in the opening direction together with the second leaf 2. At this time, the one-way clutch 12 rotates freely with respect to the shaft 3, so the second leaf 2 rotates freely. On the other hand, when the second leaf 2 rotates in the closing direction, the one-way clutch 12 rotates in the closing direction together with the second leaf 2, and the shaft 3 gripped by the one-way clutch 12 rotates in the closing direction. The rotation of the shaft 3 in the closing direction is braked by the friction resistance portion 4, so the rotation of the second leaf 2 in the closing direction is also braked.

[0023] The position adjustment member 11 has an outer shape in a cross section perpendicular to the axis that is a combination of a circular arc and a substantially triangular shape, and has a predetermined length in the axial direction. A groove 11b into which the second leaf 2 is inserted is formed at the pointed portion of the position adjustment member 11. The groove 11b is a dovetail groove whose wall surface is formed in a V-shape in cross section (see FIG. 8(b2)), and the width W1 of the back 11b2 of the groove 11b is larger than the width W2 of the entrance portion 11b1. As shown in the front view of the position adjustment member 11 seen from the second leaf 2 side in FIG. 5, the width W3 of both ends 11b4 in the axial direction of the groove 11b is larger than the width W4 of the central portion 11b3 in the axial direction of the groove 11b. At the central portion 11b3 in the axial direction of the groove 11b, the width W4 of the entrance portion 11b1 of the groove 11b is adjusted to the thickness of the second leaf 2 (see FIG. 8(b2)). The depth d of the groove 11b shown in FIG. 8(b2) is set so that a gap is formed between the bottom surface 11c of the groove 11b and the second leaf 2.

[0024] The one-way clutch 12 fixed to the position adjustment member 11 can adjust its position relative to the second leaf 2. FIG. 8 shows a cross section of the position adjustment member 11 perpendicular to the axis. FIG. 8(b1) shows the neutral position of the position adjustment member 11, FIG. 8(a1) shows the position adjustment member 11 tilted counterclockwise relative to the second leaf 2, and FIG. 8(c1) shows the position adjustment member 11 tilted clockwise relative to the second leaf 2. As shown in FIG. 8(a1), when the position adjustment member 11 tilts counterclockwise with respect to the second leaf 2 about the inlet 11b1 of the groove 11b as a fulcrum, the one-way clutch 12 moves upward. As shown in FIG. 8(c1), when the position adjustment member 11 tilts clockwise relative to the second leaf 2, the one-way clutch 12 moves downward. Therefore, the shaft 3 and the one-way clutch 12 can be aligned vertically. Also, when the position adjustment member 11 moves left and right (depth direction of the groove 11b) relative to the second leaf 2, the one-way clutch 12 moves left and right. Therefore, the shaft 3 and the one-way clutch 12 can be aligned in the left-right direction.

[0025] Fig. 9 shows a front view of the position adjustment member 11 as viewed from the second leaf 2 side. Fig. 9(b) shows the neutral position of the position adjustment member 11, Fig. 9(a) shows the position adjustment member 11 when tilted clockwise relative to the second leaf 2, and Fig. 9(c) shows the position adjustment member 11 when tilted counterclockwise relative to the second leaf 2. As shown in Figs. 9(a) and 9(c), when the position adjustment member 11 tilts relative to the second leaf 2, the one-way clutch 12 also tilts in the same way as the position adjustment member 11. Therefore, any deviation in the tilt between the shaft 3 and the one-way clutch 12 can be absorbed.

[0026] As shown in FIG. 3, a stepped engagement recess 2d is formed in the second leaf 2. The engagement recess 2d is formed, for example, in a symmetrical recess having two steps. A stepped protrusion 11d complementary to the engagement recess 2d is formed inside the groove 11b of the position adjustment member 11. The protrusion 11d is formed, for example, in a symmetrical protrusion having two steps. The protrusion 11d of the position adjustment member 11 fits into the engagement recess 2d of the second leaf 2, thereby restricting the axial movement of the position adjustment member 11 relative to the second leaf 2. Note that an engagement protrusion may be formed in the second leaf 2, and a recess that fits into the engagement protrusion may be formed in the position adjustment member 11.

[0027] The above describes the configuration and operation of the one-way braking hinge 10 of this embodiment. The one-way braking hinge 10 of this embodiment has the following advantages.

[0028] Since the position adjustment member 11 to which the one-way clutch 12 is fixed is connected to the second leaf 2 so as to be position-adjustable, the shaft 3 and the one-way clutch 12 can be automatically aligned.

[0029] With a simple structure in which a groove 11b is formed in the position adjustment member 11 and the second leaf 2 is inserted into the groove 11b, the shaft 3 and the one-way clutch 12 can be automatically aligned.

[0030] Since the width W1 of the back 11b2 of the groove 11b of the position adjustment member 11 is larger than the width W2 of the entrance portion 11b1 of the groove 11b, the position adjustment member 11 can be inclined with respect to the second leaf 2. In addition, it is possible to prevent rattling from occurring between the second leaf 2 and the position adjustment member 11 after the hinge device 10 is assembled. Therefore, it is possible to eliminate the time lag from when the second leaf 2 rotates until when the one-way clutch 12 rotates.

[0031] Since the width W3 of both axial ends 11b4 of groove 11b of position adjustment member 11 is greater than the width W4 of the axial center portion 11b3 of groove 11b, any deviation in inclination between shaft 3 and one-way clutch 12 can be absorbed.

[0032] Since the position adjustment member 11 is formed with the convex portion 11d and the second leaf 2 is formed with the engaging concave portion 2d that fits into the convex portion 11d, the movement of the position adjustment member 11 relative to the second leaf 2 in the axial direction can be restricted.

[0033] Since the one-way clutch 12 is disposed between the pair of frictional resistance portions 4, the shaft 3 can be stably supported by the pair of frictional resistance portions 4. (Modification)

[0034] 10(a1)(a2) show a modified example in which the groove 32b is provided on the second leaf 2 side. In the first embodiment, the position adjustment member 11 is provided with the groove 11b into which the second leaf 2 fits, but in this modified example, the second leaf 2 is provided with the groove 32b into which the position adjustment member 31 fits. The groove 32b is a dovetail groove like the groove 11b in the first embodiment. The position adjustment member 31 includes a cylindrical portion 31b into which the one-way clutch 12 is press-fitted, and an extension portion 31a protruding outward from the cylindrical portion 31b. The width of the inlet portion of the groove 32b is matched to the thickness of the extension portion 31a of the position adjustment member 31. The width of the groove 32b beyond the inlet portion is greater than the thickness of the extension portion 31a of the position adjustment member 31. As in this modified example, the groove 32b may be formed in the second leaf 2. The configurations of the one-way clutch 12, the shaft 3, and the first leaf 1 are the same as those in the first embodiment, so they are given the same reference numerals and the description thereof will be omitted.

[0035] 10(b1)(b2) show a modified example of the groove 11b of the position adjustment member 11. In the first embodiment, the groove 11b of the position adjustment member 11 is formed as a dovetail groove. In this modified example, a pair of wall surfaces of the groove 11b are formed parallel to each other. A pair of protrusions are formed at the entrance portion 11b1 of the groove 11b. The width of the entrance portion 11b1 of the groove 11b, i.e., the distance between the pair of protrusions, is matched to the thickness of the second leaf 2. The width of the groove 11b2 behind the entrance portion 11b1 is greater than the thickness of the second leaf 2. The groove 11b may be configured like this modified example.

[0036] 10(c1) and (c2) show another modified example of the groove 11b of the position adjustment member 11. In this modified example, the width of the groove 11b is constant from the entrance 11b1 to the back 11b2, and a pair of wall surfaces of the groove 11b are formed parallel to each other. A second leaf 2 that matches the width of the groove 11b is inserted into the groove 11b. As in this modified example, the one-way clutch 12 and the shaft 3 may be aligned only in the left-right direction of FIG. 10(c2). Second Embodiment

[0037] Fig. 11 is an exploded perspective view of a one-way braking hinge 40 according to a second embodiment of the present invention. The first leaf 1, the friction resistance portion 4, the anti-rotation member 7, the shaft 3, the one-way clutch 12, and the position adjustment member 11 are configured in the same manner as in the first embodiment shown in Fig. 3, and therefore the same reference numerals are used and the description thereof will be omitted.

[0038] In the second embodiment, the shape of the main body 42 of the second leaf 2 is different from that of the first embodiment. The main body 42 includes a base 42a having a bearing 42b formed integrally therewith and to which the position adjustment member 11 is connected, an extension 42c that is continuous with the base 42a and has a cross section in the shape of a quarter of a circle, and a mounting portion 42d that bends at a substantially right angle from the extension 42c. A mounting hole 42d1 for mounting to the lid d is formed in the mounting portion 42d.

[0039] Fig. 12 shows an example in which a one-way braking hinge 40 of the second embodiment is attached to a housing. The first leaf 1 is attached to the underside of the frame of the main body b. The attachment portion 42d of the second leaf 2 is attached to the lid body d. By forming the main body portion 42 of the second leaf 2 as in this embodiment, the hinge 40 can be hidden when the lid body d is in the closed position as shown in Fig. 12(a), improving the appearance. (Third embodiment)

[0040] Fig. 13 is an exploded perspective view of a one-way braking hinge 50 according to a third embodiment of the present invention. The first leaf 1, the friction resistance portion 4, the anti-rotation member 7, the shaft 3, the one-way clutch 12, and the position adjustment member 11 are configured in the same manner as in the first embodiment shown in Fig. 3, and therefore the same reference numerals are used and the description thereof will be omitted.

[0041] In the third embodiment, the shape of the main body 52 of the second leaf 2 is different from that of the first embodiment. The main body 52 includes an attachment portion 52a, an extension portion 52b that is continuous with the attachment portion 52a and has a cross section in the shape of a substantially half arc, and a base portion 52c that bends from the extension portion 52b toward the attachment portion 52a and is integrally formed with a bearing portion 52d. An attachment hole 52a1 for attachment to the lid body d is formed in the attachment portion 52a. A position adjustment member 11 is connected to the base portion 52c.

[0042] FIG. 14 shows an example in which a one-way braking hinge 50 of the third embodiment is attached to a housing. The first leaf 1 is attached to the underside of the frame of the main body b. The attachment portion 52a of the second leaf 2 is attached to the cover body d. By forming the second leaf 2 as in this embodiment, as shown in FIG. 14(a), the hinge 50 can be hidden when the cover body d is in the closed position. Also, as shown in FIG. 14(b), the maximum opening angle of the cover body d can be increased. (Fourth embodiment)

[0043] Fig. 15(a) is an exploded perspective view of a one-way braking hinge 60 according to a fourth embodiment of the present invention. The first leaf 1, the anti-rotation member 7, the one-way clutch 12, the position adjustment member 11, and the second leaf 2 are configured in the same manner as in the first embodiment shown in Fig. 3, and therefore the same reference numerals are used and the description thereof will be omitted.

[0044] In the first embodiment, a friction resistance portion 4 is used as the resistance portion, whereas in the fourth embodiment, a damper resistance portion 51 is used as the resistance portion. The shaft 3 is rotatably supported on the cylindrical portion 1a of the first leaf 1 via the damper resistance portion 51. When the shaft 3 rotates, a damper force is generated to brake the rotation of the shaft 3.

[0045] As shown in FIG. 15(b), the damper resistance portion 51 is formed in a cylindrical shape and has a partition wall 51a therein. The shaft 3 is provided with a partition wall 3d protruding in the radial direction. The partition wall 51a of the damper resistance portion 51 and the partition wall 3d of the shaft 3 divide the space between the damper resistance portion 51 and the shaft 3 into a first chamber S1 and a second chamber S2. The first chamber S1 and the second chamber S2 are filled with hydraulic oil. When the shaft 3 rotates, one of the first chamber S1 and the second chamber S2 becomes a high-pressure chamber, and the other becomes a low-pressure chamber. At this time, the hydraulic oil flows from the high-pressure chamber to the low-pressure chamber through a narrow gap between the damper resistance portion 51 and the shaft 3, generating a braking force that resists the rotation of the shaft 3.

[0046] This specification is based on Japanese Patent Application No. 2020-133722, filed on August 6, 2020, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0047] 1…First leaf 1a…Cylinder part of first leaf 2…Second Reef 2d…Engagement recess 3...Axis 4...Friction resistance part (resistance part) 10...One-way braking hinge 11... Position adjustment member 11b...Groove 11b1...groove entrance 11b2…Deep in the ditch 11b3: Axial center of groove 11b4...Both ends of the groove in the axial direction 11d…Convex part 12...One-way clutch 31... Position adjustment member 32b…Groove 40...One-way braking hinge 50...One-way braking hinge 51...Damper resistor (resistance part)

Claims

1. A first leaf; a shaft rotatably supported by the first leaf; At least one resistor that resists rotation of the shaft; A second leaf rotatably coupled to the shaft; a one-way clutch into which the shaft is inserted; a position adjustment member to which the one-way clutch is fixed, the position adjustment member is connected to the second leaf so as to be position-adjustable; The position adjustment member has a groove formed therein into which the second leaf is inserted.

2. A first leaf; a shaft rotatably supported by the first leaf; At least one resistor that resists rotation of the shaft; A second leaf rotatably coupled to the shaft; a one-way clutch into which the shaft is inserted; a position adjustment member to which the one-way clutch is fixed, the position adjustment member is connected to the second leaf so as to be position-adjustable; a groove is formed in one of the position adjustment member or the second leaf into which the other of the position adjustment member or the second leaf is inserted; A one-way braking hinge in which the width of the groove at the back is greater than the width of the groove at the entrance.

3. A first leaf; a shaft rotatably supported by the first leaf; At least one resistor that resists rotation of the shaft; A second leaf rotatably coupled to the shaft; a one-way clutch into which the shaft is inserted; a position adjustment member to which the one-way clutch is fixed, the position adjustment member is connected to the second leaf so as to be position-adjustable; a groove is formed in one of the position adjustment member or the second leaf into which the other of the position adjustment member or the second leaf is inserted; A one-way braking hinge in which the width of both ends of the groove in the axial direction is greater than the width of a central portion of the groove in the axial direction.

4. A first leaf; a shaft rotatably supported by the first leaf; At least one resistor that resists rotation of the shaft; A second leaf rotatably coupled to the shaft; a one-way clutch into which the shaft is inserted; a position adjustment member to which the one-way clutch is fixed, the position adjustment member is connected to the second leaf so as to be position-adjustable; a groove is formed in one of the position adjustment member or the second leaf into which the other of the position adjustment member or the second leaf is inserted; A one-way braking hinge in which a convex portion or a concave portion is formed on one side, and an engaging concave portion or an engaging convex portion is formed on the other side that fits into the convex portion or the concave portion in order to limit axial movement of the position adjustment member relative to the second leaf.

5. A first leaf; a shaft rotatably supported by the first leaf; At least one resistor that resists rotation of the shaft; A second leaf rotatably coupled to the shaft; a one-way clutch into which the shaft is inserted; a position adjustment member to which the one-way clutch is fixed, the position adjustment member is connected to the second leaf so as to be position-adjustable; a pair of resistors are attached to the pair of cylindrical portions of the first leaf; The one-way clutch is disposed between the pair of cylindrical portions.

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