JPWO2020208796A1 - Hinge structure - Google Patents

Abstract

Provided is a hinge structure capable of easily and safely opening and closing a lid (9) having a low center of gravity (9c) by using a spring force. The hinge structure includes a first member (1), a second member (2), a rotating shaft (3), and a link mechanism (4). The first member (1) is attached to a container (8) having an opening (81). The second member (2) is attached to the lid (9). The rotation shaft (3) rotatably connects the first member (1) and the second member (2). The link mechanism (4) connects the first member (1) and the second member (2) at a position different from that of the rotation shaft (3). The spring mechanism (7) included in the link mechanism (4) applies torque in the direction of opening the lid (9) to the second member (2). With the lid (9) closing the opening (81), the axis (3a) of the rotating shaft (3) is located above the center of gravity (9c) of the lid (9). The link mechanism (4) applies torque to the second member (2) so that the lid (9) is stationary in any posture including the posture in which the opening (81) is closed.

Description

The present disclosure relates to a hinge structure, and more particularly to a hinge structure provided with a spring to assist the opening operation of the lid.

For example, Patent Document 1 discloses a hinge structure capable of assisting the opening operation of the lid. This hinge structure surrounds a lower member mounted on a container, an upper member mounted on a lid, a rotating shaft for rotatably connecting the upper member and the lower member, and the rotating shaft. It is equipped with a torsion coil spring that is located. The torque applied to the upper member by the torsion coil spring supports the opening operation of the lid. When the lid is in the position where the opening of the container is closed (hereinafter referred to as "fully closed position"), the center of gravity of the lid is located higher than the axis of the rotation axis. That is, in the conventional hinge structure, the lid that supports the opening operation is a type of lid in which the center of gravity is located high in the fully closed position.

Japanese Patent No. 2948538

The present disclosure has been invented in view of the above problems, and provides a hinge structure capable of easily and safely opening and closing a lid of a type in which the center of gravity is low in a fully closed position by using a spring force. With the goal.

The hinge structure according to one aspect of the present disclosure includes a first member mounted on a container having an opening facing upward, a second member mounted on a lid for closing the opening, the first member, and the first member. It includes a rotating shaft that rotatably connects the two members, and a link mechanism that connects the first member and the second member at a position different from the rotating shaft.

The link mechanism includes a torsion coil type spring mechanism configured to give a torque in a direction in which the lid is pulled up and opened to the second member. The axis of the rotation shaft is provided so as to be located above the center of gravity of the lid when the lid is closed, and the link mechanism includes a posture in which the opening is closed. The torque is applied to the second member so that the lid is stationary in an arbitrary posture.

FIG. 1A is a perspective view of a container with a lid attached via the hinge structure of the first embodiment. FIG. 1B is a side view of the same container. FIG. 2 is a side view of the hinge structure of the above when the opening degree is 0 °. FIG. 3 is a view taken along the arrow a of FIG. FIG. 4A is a view taken along the arrow b of FIG. FIG. 4B is a cross-sectional view taken along the line AA of FIG. 4A. FIG. 5A is a top view of the hinge structure of the same when the opening degree is 60 °. FIG. 5B is a sectional view taken along line BB of FIG. 5A. FIG. 6A is a top view of the hinge structure of the same when the opening degree is 100 °. FIG. 6B is a sectional view taken along line CC of FIG. 6A. FIG. 7A is a side view of the first model assumed in the process of inventing the hinge structure of the above. FIG. 7B is a graph showing the relationship between torque and opening degree in the same first model. FIG. 8A is a side view of the second model assumed in the process of inventing the hinge structure of the above. FIG. 8B is a graph showing the relationship between the torque and the opening degree in the second model of the same. FIG. 9 is a graph showing the relationship between the opening degree of the lid and the torque in the hinge structure of the same. FIG. 10A is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value −10 ° in the hinge structure of the same. FIG. 10B is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value −5 ° in the hinge structure of the above. FIG. 10C is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value + 5 ° in the hinge structure of the same. FIG. 10D is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value + 10 ° in the hinge structure of the same. FIG. 11A is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value −20% in the hinge structure of the same. FIG. 11B is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value −10% in the hinge structure of the same. FIG. 11C is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value + 10% in the hinge structure of the same. FIG. 11D is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value + 20% in the hinge structure of the same. FIG. 12A is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value −20% in the hinge structure of the same. FIG. 12B is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value −10% in the hinge structure of the same. FIG. 12C is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value + 10% in the hinge structure of the same. FIG. 12D is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value + 20% in the same hinge structure. FIG. 13A is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −30% in the hinge structure of the same. FIG. 13B is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −20% in the hinge structure of the same. FIG. 13C is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −10% in the hinge structure of the same. FIG. 13D is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 10% in the hinge structure of the same. FIG. 13E is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 20% in the hinge structure of the same. FIG. 13F is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 30% in the hinge structure of the same. FIG. 14A is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value −20% in the hinge structure of the same. FIG. 14B is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value −10% in the hinge structure of the same. FIG. 14C is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value + 10% in the hinge structure of the same. FIG. 14D is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value + 20% in the hinge structure of the same. FIG. 15 is a graph showing the relationship between the opening degree of the lid and the torque in the hinge structure of the second embodiment. FIG. 16A is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value −10 ° in the hinge structure of the same. FIG. 16B is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value −5 ° in the hinge structure of the same. FIG. 16C is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value + 5 ° in the hinge structure of the same. FIG. 16D is a graph showing the relationship between the opening degree of the lid and the torque when the angle α is set to the reference value + 10 ° in the hinge structure of the same. FIG. 17A is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value −20% in the hinge structure of the same. FIG. 17B is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value −10% in the hinge structure of the same. FIG. 17C is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value + 10% in the hinge structure of the same. FIG. 17D is a graph showing the relationship between the opening degree of the lid and the torque when the first distance d1 is set to the reference value + 20% in the hinge structure of the same. FIG. 18A is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value −20% in the hinge structure of the same. FIG. 18B is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value −10% in the hinge structure of the same. FIG. 18C is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value + 10% in the hinge structure of the same. FIG. 18D is a graph showing the relationship between the opening degree of the lid and the torque when the second distance d2 is set to the reference value + 20% in the same hinge structure. FIG. 19A is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −30% in the hinge structure of the same. FIG. 19B is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −20% in the hinge structure of the same. FIG. 19C is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value −10% in the hinge structure of the same. FIG. 19D is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 10% in the hinge structure of the same. FIG. 19E is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 20% in the hinge structure of the same. FIG. 19F is a graph showing the relationship between the opening degree of the lid and the torque when the third distance d3 is set to the reference value + 30% in the hinge structure of the same. FIG. 20A is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value −20% in the hinge structure of the same. FIG. 20B is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value −10% in the hinge structure of the same. FIG. 20C is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value + 10% in the hinge structure of the same. FIG. 20D is a graph showing the relationship between the opening degree of the lid and the torque when the fourth distance d4 is set to the reference value + 20% in the same hinge structure.

(Embodiment 1)
1A and 1B show a state in which the hinge structure of the first embodiment is attached to the container 8 and the lid 9. In FIGS. 1A and 1B, the state in which the opening 81 of the container 8 is closed by the lid 9 is shown by a solid line. When the lid 9 is in the position where the opening 81 is closed (that is, the fully closed position), the opening degree of the lid 9 is 0 °.

The container 8 includes a hollow container body 80 having an opening 81, and a plurality of support legs 83 for supporting the container body 80. The container body 80 can have any structure as long as it functions as a container. The material contained in the container body 80 may be a liquid or a solid. Further, a human or an animal may be housed in the container body 80.

The opening 81 is open facing upward. The direction in which the opening 81 opens is not limited to directly above, and may be diagonally upward. It is possible to put things in and out of the container body 80 through the opening 81. Alternatively, humans or animals can enter and exit the container body 80 through the opening 81. The opening 81 is formed in the upper part of the container body 80, but the portion of the container body 80 in which the opening 81 is formed is not particularly limited.

The hinge structure of the first embodiment is a pin-shaped structure that rotatably connects the first member 1 mounted on the container 8, the second member 2 mounted on the lid 9, and the first member 1 and the second member 2. A rotating shaft 3 (see FIG. 4B and the like) and a link mechanism 4 for connecting the first member 1 and the second member 2 at a location different from the rotating shaft 3 are provided. The lid 9 rotates around the rotation shaft 3 (in other words, around the axis 3a of the rotation shaft 3).

First, the first member 1 will be described.

The first member 1 is a metal member that is fixed to a part of the upper surface of the container 8 and in the vicinity of the opening 81. The portion of the container 8 to which the first member 1 is fixed is a portion behind the opening 81. In other words, the opening 81 is located in front of the portion where the first member 1 is fixed in the container 8.

The first member 1 has a fixing portion 10 that is immovably mounted on the container 8, an insertion portion 11 through which the rotating shaft 3 is inserted, and an insertion portion 12 through which the first shaft portion 51 is inserted. (See FIG. 4B, etc.). The first shaft portion 51 is a pin-shaped member that constitutes one joint of the link mechanism 4. The rotating shaft 3 inserted through the insertion portion 11 and the first shaft portion 51 inserted through the insertion portion 12 are positioned parallel to each other in a posture extending in the left-right direction. The left-right direction is a direction orthogonal to the front-back direction.

In a state where the first member 1 is fixed to the container 8, the rotating shaft 3 is located in front of the first shaft portion 51 and above the first shaft portion 51. The rotating shaft 3 is located diagonally upward in front of the first shaft portion 51.

The positional relationship between the rotating shaft 3 and the first shaft portion 51 is not limited to this. For example, the rotating shaft 3 may be located in front of the first shaft portion 51 and at the same height as the first shaft portion 51.

Next, the second member 2 will be described.

The second member 2 is a metal member fixed to the lid 9. The second member 2 includes a fixing portion 20 that is immovably mounted on the peripheral edge portion of the lid 9, an insertion portion through which the rotating shaft 3 is inserted, and an insertion portion 22 through which the second shaft portion 52 is inserted. Has. The second shaft portion 52 is a pin-shaped member that constitutes one joint of the link mechanism 4. When the lid 9 has an opening degree of 0 °, the second shaft portion 52 is located in front of the rotating shaft 3 and above the rotating shaft 3. The second shaft portion 52 is located diagonally upward in front of the rotating shaft 3.

The positional relationship between the rotating shaft 3 and the second shaft portion 52 is not limited to this. For example, the second shaft portion 52 may be located in front of the rotating shaft 3, and the second shaft portion 52 and the rotating shaft 3 may be located at the same height.

Next, the link mechanism 4 will be described.

In the link mechanism 4, in addition to the first shaft portion 51 provided on the first member 1 and the second shaft portion 52 provided on the second member 2, the first link 61, the second link 62, and the third shaft The portion 53 and the spring mechanism 7 are included.

The first link 61 is rotatably connected to the first member 1 with one degree of freedom via the first shaft portion 51. The first shaft portion 51 is prevented from rotating with respect to the first member 1. The second link 62 is rotatably connected to the second member 2 with one degree of freedom via the second shaft portion 52.

The third shaft portion 53 is a pin-shaped member that constitutes one joint of the link mechanism 4. The first link 61 and the second link 62 are rotatably connected to each other with one degree of freedom via the third shaft portion 53.

The first shaft portion 51, the second shaft portion 52, and the third shaft portion 53, which form the three joints of the link mechanism 4, are all held in a posture extending in the left-right direction and are located parallel to the rotation shaft 3. .. That is, the first shaft portion 51, the second shaft portion 52, the third shaft portion 53, and the rotating shaft 3 are all held in a posture extending in the left-right direction and are parallel to each other.

In the hinge structure of the first embodiment, the second link 62 includes two arms 621 and 622 located parallel to each other at a distance from each other to the left and right. The second shaft portion 52 and the third shaft portion 53 are inserted into each of the two arms 621 and 622. The two arms 621 and 622 are each rotatable around the second shaft portion 52 (that is, around the axis 52a of the second shaft portion 52) with one degree of freedom, and around the third shaft portion 53 (that is, around the third shaft portion 53). It is rotatable with one degree of freedom (around the axis 53a of the third shaft portion 53).

The first link 61 includes an insertion portion through which the first shaft portion 51 is inserted and an insertion portion through which the third shaft portion 53 is inserted at separate locations. When the lid 9 has an opening degree of 0 °, the third shaft portion 53 is located above the first shaft portion 51.

The spring mechanism 7 is a torsion coil type spring mechanism provided so as to surround the outer circumference of the first shaft portion 51, and is configured to give a torque in a direction in which the lid 9 is pulled up and opened to the second member 2. Has been done.

In the hinge structure of the first embodiment, the spring mechanism 7 includes two torsion coil springs 71 and 72 located at a distance from each other to the left and right. The two torsion coil springs 71 and 72 are both located so as to surround the outer circumference of the first shaft portion 51. One torsion coil spring 71 is located so as to surround the outer circumference of the first end portion 511 in the axial direction of the first shaft portion 51, and the other torsion coil spring 72 is located at the second end portion in the axial direction of the first shaft portion 51. It is located around the outer circumference of 512. In the hinge structure of the first embodiment, it is suppressed that the entire spring mechanism 7 protrudes greatly rearward from the lid 9.

In the hinge structure of the first embodiment, the first link 61 includes a cover 615 covering one torsion coil spring 71 and a cover 616 covering another torsion coil spring 72, but it is essential to include covers 615 and 616. is not it.

In the hinge structure of the first embodiment, when the first link 61 rotates around the first shaft portion 51 to change the posture, the torsion coil springs 71 and 72 are deformed together according to the change, and the first link 61 becomes the first link 61. Change the spring force exerted.

The spring force exerted by the torsion coil springs 71 and 72 on the first link 61 is transmitted to the second member 2 via the second link 62. The spring force transmitted to the second member 2 generates a torque in the direction of opening the lid 9 (that is, the direction of pulling the lid 9 backward). The torque given to the second member 2 by the two torsion coil springs 71 and 72 is the torque given to the second member 2 by the spring mechanism 7 to support the opening operation of the lid 9.

4A and 4B show a state in which the lid 9 has an opening degree of 0 °. 5A and 5B show a state in which the lid 9 has an opening degree of 60 °, that is, a state in which the lid 9 is rotated by 60 ° around the rotation axis 3 from the fully closed position. 6A and 6B show a state in which the lid 9 has an opening degree of 100 °, that is, a state in which the lid 9 is rotated by 100 ° around the rotation axis 3 from the fully closed position.

FIG. 9 is a graph showing how the torque changes according to the opening degree of the lid 9. The horizontal axis of FIG. 9 is the opening degree [°] of the lid 9. The vertical axis is the torque [N mm]. The curve C1 in FIG. 9 shows how the torque required to support the lid 9 in that posture gradually changes according to the change in the opening degree of the lid 9. The curve C2 in FIG. 9 shows how the torque generated by the spring mechanism 7 so as to support the opening operation of the lid 9 gradually changes according to the change in the opening degree of the lid 9.

In the hinge structure of the first embodiment, the main parameters are determined so that the torque curve C2 that supports the opening operation of the lid 9 approximates the torque curve C1 required to support the lid 9 in its posture. doing. By approximating the torque curve C2 to the torque curve C1, the lid 9 is stopped in an arbitrary posture within a predetermined range (for example, within the range of 0 ° to 90 ° opening) from the closed state of the lid 9. When the opening degree of the lid 9 exceeds the predetermined range, the lid 9 naturally falls backward. The predetermined range here is not limited to the range of the opening degree of the lid 9 from 0 ° to 90 °, and as another example, the opening degree of the lid 9 may be in the range of 0 ° to 80 °. The opening degree of 9 may be in the range of 0 ° to 100 °.

The hinge structure of the first embodiment is configured as a so-called free stop hinge. Even if the torque curve C1 and the torque curve C2 do not completely match, if they are close to each other, there is no problem in practical use and the hinge functions as a free stop hinge.

The main parameters described above are, for example, an angle α, an angle β, a first distance d1, a second distance d2, a third distance d3, and a fourth distance d4.

The angle α is virtual including the axis 3a of the rotating shaft 3 and the axis 51a of the first shaft portion 51 when the lid 9 has an opening degree of 0 ° (that is, when the lid 9 is in the fully closed position). The angle formed by the first plane P1 and the virtual second plane P2 including the axis 3a of the rotating shaft 3 and the axis 52a of the second shaft portion 52 (see FIG. 4B). The angle α is an acute angle.

The angle β is an angle indicating how low the center of gravity 9c of the lid 9 is with respect to the axis 3a of the rotating shaft 3. As shown in FIG. 1B, the angle β is a virtual third plane P3 including the axis 3a of the rotating shaft 3 and the center of gravity 9c of the lid 9, and a horizontal plane Ph including the axis 3a of the rotating shaft 3. , The angle to make. The angle β is an acute angle, and as an example, it may be set within a range greater than 0 ° and less than 40 °, set within a range greater than 5 ° and less than 35 °, or greater than 10 °. Can be set within a range that is large and smaller than 35 °.

The first distance d1 is the distance between the axis 3a of the rotating shaft 3 and the axis 51a of the first shaft portion 51 (see FIG. 4B). The second distance d2 is the distance between the axis 3a of the rotating shaft 3 and the axis 52a of the second shaft portion 52. The third distance d3 is the distance between the axis 52a of the second shaft portion 52 and the axis 53a of the third shaft portion 53. The fourth distance d4 is the distance between the axis 53a of the third shaft portion 53 and the axis 51a of the first shaft portion 51.

The axis 3a of the rotating shaft 3 is a rotation center in which the first member 1 and the second member 2 are rotatably connected. The axis 51a of the first shaft portion 51 is a rotation center in which the first member 1 and the first link 61 are rotatably connected. The axis 52a of the second shaft portion 52 is a rotation center in which the second member 2 and the second link 62 are rotatably connected. The axis 53a of the third shaft portion 53 is a rotation center in which the first link 61 and the second link 62 are rotatably connected.

Basically, the angle β is set based on the position of the center of gravity 9c of the target lid 9 that supports the opening operation, and for this angle β, the angle α, the first distance d1, and so on so as to realize the free stop hinge. The second distance d2, the third distance d3, and the fourth distance d4 are set.

The present inventor has set the above-mentioned main parameters in order to realize a hinge structure that can easily and safely open and close the lid 9 of the type in which the center of gravity 9c is located low in the fully closed position by using the spring force. Among them, the importance of the angle α was found by a logical approach and various trials and errors based on it.

The model shown in FIG. 7A is the first model of the hinge mechanism assumed in the process of the logical approach. In the first model, the angle α is 90 °, the first distance d1 and the third distance d3 are equal, and the second distance d2 and the fourth distance d4 are equal.

FIG. 7B shows how the torque generated based on the spring force of the spring mechanism 7 gradually changes according to the rotation angle of the second member 2 in the first model. The horizontal axis of FIG. 7B is the rotation angle (corresponding to the opening degree of the lid 9) in which the second member 2 rotates around the rotation axis 3, and the vertical axis is the torque [N · mm].

As is clear from FIG. 7B, in the first model, the torque peaks when the rotation angle is 0 °. Therefore, it is necessary to modify the rotation angle when the torque peaks to be larger than 0 °.

The model shown in FIG. 8A is a second model of the hinge mechanism assumed in the process of the logical approach. The second model differs from the first model in that the angle α is 60 °.

FIG. 8B shows how the torque generated based on the spring force of the spring mechanism 7 gradually changes according to the rotation angle in the second model. The horizontal axis of FIG. 8B is the rotation angle (corresponding to the opening degree of the lid 9) in which the second member 2 rotates around the rotation axis 3, and the vertical axis is the torque [N · mm].

As is clear from FIG. 8B, in the second model, the torque peaks at a rotation angle larger than 0 °. The reason why the rotation angle when the torque peaks is not 30 ° but smaller than this is that the larger the rotation angle, the smaller the spring force exerted by the spring mechanism 7.

As can be inferred from the comparison between the first model and the second model, in the hinge mechanism of the first embodiment, the change in torque generated by the spring mechanism 7 is changed to the change in torque required to support the lid 9. In order to approximate (that is, to approximate the curve C2 to the curve C1), the setting of the angle α is the most important.

Here, as can be seen by comparing the curve shown in FIG. 8B with the curve C1 shown in FIG. 9, the fluctuation range of the torque generated in the second model is the fluctuation of the torque required to support the lid 9. Greater than width. Therefore, it is desirable to make modifications to the second model to reduce the torque fluctuation range. In the hinge structure of the first embodiment, the fourth distance d4 is set to be larger than the second distance d2 in order to reduce the fluctuation range of the torque. Further, in the hinge structure of the first embodiment, by adjusting the ratio of the first distance d1 and the third distance d3, the second link 62 rotates in the direction of pulling the second member 2 via the second shaft portion 52. The virtual circle centered on the axis 3a of the shaft 3 and passing through the axis 52a of the second shaft portion 52 is brought closer to the tangential direction at the axis 52a.

Through various trials and errors based on the above approach, the inventor preferably sets the angle α in a range that satisfies the relationship of the following equation (1) in order to approximate the curve C2 to the curve C1. I found. In addition, the inventor states that in order to approximate the curve C2 to the curve C1, the first distance d1, the second distance d2, the third distance d3, and the fourth distance d4 satisfy the relationship of the following equation (2). We have found that it is preferable to set it in the range.

α = (40-β) × 1.2 (± 5) [°] ・ ・ ・ (1)
d1: d2: d3: d4 = 1 (± 10%): 1 (± 10%): 1.5 (± 20%): 1.4 (± 10%) ... (2)
As shown in the above equation (1), the angle α is preferably set within a range of 5 ° above and below the reference angle calculated by α = (40-β) × 1.2 [°]. .. In the hinge structure of the first embodiment, since the angle β is 18 °, the angle α is set to the reference angle of 26.4 °. According to the equation (1), in order to approximate the curve C2 to the curve C1, the angle α is set within the range of 26.4 ° ± 5 ° (that is, within the range of 21.4 ° to 31.4 °). It is preferable to do so.

In addition, in the hinge structure of the first embodiment, the ratio of the first distance d1, the second distance d2, the third distance d3 and the fourth distance d4 is set to d1: d2 so as to satisfy the relationship of the above equation (2). : D3: d4 = 1: 1: 1.5: 1.4, but the present invention is not limited to this, and the first distance d1, the second distance d2, and the fourth distance d4 are described above. It is permissible to set within a range of 10% above and below the value, and at the third distance d3, it is permissible to set within a range of 20% above and below the above relationship.

The graphs shown in FIGS. 10A to 14D are graphs for showing the critical significance of the range shown by the formulas (1) and (2).

The graphs shown in FIGS. 10A to 10D are graphs in which only the angle α is different from the graph shown in FIG. In the graph of FIG. 10A, the angle α is set to the reference value (26.4 °) -10 °, in the graph of FIG. 10B, the angle α is set to the reference value (26.4 °) -5 °, and in the graph of FIG. 10C, the angle is set. α is a reference value (26.4 °) + 5 °, and in the graph of FIG. 10D, the angle α is a reference value (26.4 °) + 10 °. From these graphs, it can be seen that in order to approximate the curve C2 to the curve C1, it is preferable that the angle α is within the range of the reference value ± 5 °.

The graphs shown in FIGS. 11A to 11D are graphs in which only the first distance d1 is different from the graph shown in FIG. In the graph of FIG. 11A, the first distance d1 is set to the reference value -20%, in the graph of FIG. 11B, the first distance d1 is set to the reference value -10%, and in the graph of FIG. 11C, the first distance d1 is set to the reference value +10. %, And in the graph of FIG. 11D, the first distance d1 is set to the reference value + 20%. From these graphs, it can be seen that in order to approximate the curve C2 to the curve C1, it is preferable that the first distance d1 is within the range of the reference value ± 10 °.

The graphs shown in FIGS. 12A to 12D are graphs in which only the second distance d2 is different from the graph shown in FIG. In the graph of FIG. 12A, the second distance d2 is set to the reference value -20%, in the graph of FIG. 12B, the second distance d2 is set to the reference value -10%, and in the graph of FIG. 12C, the second distance d2 is set to the reference value +10. %, And in the graph of FIG. 12D, the first distance d1 is set to the reference value + 20%. From these graphs, it can be seen that in order to approximate the curve C2 to the curve C1, it is preferable that the second distance d2 is within the range of the reference value ± 10 °.

The graphs shown in FIGS. 13A to 13F are graphs in which only the third distance d3 is different from the graph shown in FIG. In the graph of FIG. 13A, the third distance d3 is set to the reference value -30%, in the graph of FIG. 13B, the third distance d3 is set to the reference value -20%, and in the graph of FIG. 13C, the third distance d3 is set to the reference value-. 10%, the third distance d3 is the reference value + 10% in the graph of FIG. 13D, the third distance d3 is the reference value + 20% in the graph of FIG. 13E, and the third distance d3 is the reference value in the graph of FIG. 13F. The value is + 30%. From these graphs, it can be seen that in order to approximate the curve C2 to the curve C1, it is preferable that the third distance d3 is within the range of the reference value ± 20 °.

The graphs shown in FIGS. 14A to 14D are graphs in which only the fourth distance d4 is different from the graph shown in FIG. In the graph of FIG. 14A, the second distance d2 is set to the reference value -20%, in the graph of FIG. 14B, the fourth distance d4 is set to the reference value -10%, and in the graph of FIG. 14C, the fourth distance d4 is set to the reference value +10. %, And in the graph of FIG. 14D, the fourth distance d4 is set to the reference value + 20%. From these graphs, it can be seen that in order to approximate the curve C2 to the curve C1, it is preferable that the fourth distance d4 is within the range of the reference value ± 10 °.

(Embodiment 2)
Next, the hinge structure of the second embodiment will be described. Hereinafter, the same configurations as those in the first embodiment will be designated by the same reference numerals, detailed description thereof will be omitted, and only the configurations different from the first embodiment will be described.

In the hinge structure of the second embodiment, only the angle α and the angle β are different from the first embodiment. In the hinge structure of the second embodiment, the center of gravity 9c of the lid 9 is lower than that of the first embodiment, and specifically, the angle β = 30 °. Correspondingly, the angle α is set to the angle α = 12 ° so as to satisfy the relationship of the above equation (1). The ratios of the first distance d1, the second distance d2, the third distance d3, and the fourth distance d4 are the same as those in the first embodiment, and satisfy the above formula (2).

As shown in FIG. 15, in the second embodiment as well, the curve C2 is well approximated to the curve C1 by setting the main parameters so as to satisfy the above equations (1) and (2).

The critical significance of the range represented by the formulas (1) and (2) in the hinge structure of the second embodiment can be understood from the graphs shown in FIGS. 16A to 20D.

The graphs shown in FIGS. 16A to 16D are graphs in which only the angle α is different from the graph shown in FIG. In the graph of FIG. 16A, the angle α is set to the reference value (12 °) -10 °, in the graph of FIG. 16B, the angle α is set to the reference value (12 °) -5 °, and in the graph of FIG. 16C, the angle α is used as the reference. The value (12 °) + 5 ° is set, and in the graph of FIG. 16D, the angle α is set to the reference value (12 °) + 10 °. From these graphs, it can be seen that even in the hinge structure of the second embodiment, in order to approximate the curve C2 to the curve C1, it is preferable that the angle α is within the range of the reference value ± 5 °.

The graphs shown in FIGS. 17A to 17D are graphs in which only the first distance d1 is different from the graph shown in FIG. In the graph of FIG. 17A, the first distance d1 is set to the reference value -20%, in the graph of FIG. 17B, the first distance d1 is set to the reference value -10%, and in the graph of FIG. 17C, the first distance d1 is set to the reference value +10. %, And in the graph of FIG. 17D, the first distance d1 is set to the reference value + 20%. From these graphs, it can be seen that even in the hinge structure of the second embodiment, in order to approximate the curve C2 to the curve C1, it is preferable that the first distance d1 is within the range of the reference value ± 10 °.

The graphs shown in FIGS. 18A to 18D are graphs in which only the second distance d2 is different from the graph shown in FIG. In the graph of FIG. 18A, the second distance d2 is set to the reference value -20%, in the graph of FIG. 18B, the second distance d2 is set to the reference value -10%, and in the graph of FIG. 18C, the second distance d2 is set to the reference value +10. %, And in the graph of FIG. 18D, the first distance d1 is set to the reference value + 20%. From these graphs, it can be seen that even in the hinge structure of the second embodiment, in order to approximate the curve C2 to the curve C1, it is preferable that the second distance d2 is within the range of the reference value ± 10 °.

The graphs shown in FIGS. 19A to 19F are graphs in which only the third distance d3 is different from the graph shown in FIG. In the graph of FIG. 19A, the third distance d3 is set to the reference value -30%, in the graph of FIG. 19B, the third distance d3 is set to the reference value -20%, and in the graph of FIG. 19C, the third distance d3 is set to the reference value-. 10%, the third distance d3 is the reference value + 10% in the graph of FIG. 19D, the third distance d3 is the reference value + 20% in the graph of FIG. 19E, and the third distance d3 is the reference value in the graph of FIG. 19F. The value is + 30%. From these graphs, it can be seen that even in the hinge structure of the second embodiment, in order to approximate the curve C2 to the curve C1, it is preferable that the third distance d3 is within the range of the reference value ± 20 °.

The graphs shown in FIGS. 20A to 20D are graphs in which only the fourth distance d4 is different from the graph shown in FIG. In the graph of FIG. 20A, the fourth distance d4 is set to the reference value -20%, in the graph of FIG. 20B, the fourth distance d4 is set to the reference value -10%, and in the graph of FIG. 20C, the fourth distance d4 is set to the reference value +10. %, And in the graph of FIG. 20D, the fourth distance d4 is set to the reference value + 20%. From these graphs, it can be seen that even in the hinge structure of the second embodiment, in order to approximate the curve C2 to the curve C1, it is preferable that the fourth distance d4 is within the range of the reference value ± 10 °.

Although the hinge structure of the present disclosure has been described above based on the first and second embodiments, the hinge structure of the present disclosure is not limited to the first and second embodiments, and is appropriately within the scope of the technical idea of the present disclosure. It is possible to make design changes.

For example, in the first embodiment, the angle α is set in the range of 26.4 ° ± 5 °, and in the second embodiment, the angle α is set in the range of 12 ° ± 5 °, but it is 45 ° or less. By setting the angle α so as to satisfy the equation (1) within the above range, a free stop hinge having no practical problem can be realized.

(Aspect)
As is clear from the above-described embodiment, the hinge structure of the first aspect includes a first member 1, a second member 2, a rotating shaft 3, and a link mechanism 4. The first member 1 is attached to a container 8 having an opening 81 facing upward. The second member 2 is attached to a lid 9 for closing the opening 81. The rotating shaft 3 rotatably connects the first member 1 and the second member 2. The link mechanism 4 connects the first member 1 and the second member 2 at a position different from that of the rotating shaft 3. The link mechanism 4 includes a twist coil type spring mechanism 7. The spring mechanism 7 is configured to give a torque in a direction in which the lid 9 is pulled up and opened to the second member 2. The axis 3a of the rotating shaft 3 is provided so as to be located above the center of gravity 9c of the lid 9 when the lid 9 closes the opening 81. The link mechanism 4 is configured to apply torque to the second member 2 so that the lid 9 is stationary in an arbitrary posture including a posture in which the opening 81 is closed.

According to the hinge structure of the first aspect, the lid 9 of the type in which the center of gravity 9c is located lower in the posture in which the opening 81 is closed (that is, the type in which the center of gravity 9c is located lower than the axis 3a of the rotating shaft 3) is provided. The torque generated by the spring mechanism 7 allows the spring mechanism 7 to stand still in any posture. Therefore, even a heavy lid 9 can be safely opened and closed.

The hinge structure of the second aspect is realized in combination with the first aspect. In the hinge structure of the second aspect, the link mechanism 4 includes a first shaft portion 51, a first link 61, a second shaft portion 52, a second link 62, a third shaft portion 53, and a spring mechanism 7. The first shaft portion 51 is provided on the first member 1. The first link 61 is rotatably connected to the first member 1 via the first shaft portion 51. The second shaft portion 52 is provided on the second member 2. The second link 62 is rotatably connected to the second member 2 via the second shaft portion 52. The third shaft portion 53 rotatably connects the first link 61 and the second link 62. The spring mechanism 7 is provided so as to surround the outer circumference of the first shaft portion 51. The link mechanism 4 changes the torque according to the posture of the first link 61 with respect to the first member 1, and torques the second member 2 so that the lid 9 is stationary in any posture including the posture in which the opening 81 is closed. Is configured to give.

According to the hinge structure of the second aspect, the torque for pulling up the lid 9 with respect to the second member 2 via the first link 61, the third shaft portion 53, the second link 62, and the second shaft portion 52. The lid 9 of the type having a low center of gravity 9c can be stopped in any posture.

The hinge structure of the third aspect is realized in combination with the second aspect. In the hinge structure of the third aspect, the angle α is set to 45 ° or less. The angle α is a second plane P1 including the axis 3a of the rotating shaft 3 and the axis 51a of the first shaft portion 51, and a second axis including the axis 3a of the rotating shaft 3 and the axis 52a of the second shaft portion 52. This is the angle formed by the plane P2.

According to the hinge structure of the third aspect, the spring mechanism 7 exerts the lid 9 of the type in which the position of the center of gravity 9c is low by setting the angle α which is found to be the most important parameter by the inventor. It is realized that the force is used to stand still in an arbitrary posture.

The hinge structure of the fourth aspect is realized in combination with the second aspect. In the hinge structure of the fourth aspect, the angle α is set in a range that satisfies the relationship of α = (40-β) × 1.2 (± 5) [°] based on the angle β. The angle α is a second plane P1 including the axis 3a of the rotating shaft 3 and the axis 51a of the first shaft portion 51, and a second axis including the axis 3a of the rotating shaft 3 and the axis 52a of the second shaft portion 52. This is the angle formed by the plane P2. The angle β is an angle formed by the third plane P3 including the axis 3a of the rotating shaft 3 and the center of gravity 9c of the lid 9 and the horizontal plane Ph including the axis 3a of the rotating shaft 3.

According to the hinge structure of the fourth aspect, the spring mechanism 7 exerts the lid 9 of the type in which the position of the center of gravity 9c is low by setting the angle α which is found to be the most important parameter by the inventor. It is realized that the force is used to stand still in an arbitrary posture.

The hinge structure of the fifth aspect is realized in combination with the third or fourth aspect. In the hinge structure of the fifth aspect, the first distance d1, the second distance d2, the third distance d3, and the fourth distance d4 are d1: d2: d3: d4 = 1 (± 10%): 1. It is set in a range that satisfies the relationship of (± 10%): 1.5 (± 20%): 1.4 (± 10%). The first distance d1 is the distance between the axis 3a of the rotating shaft 3 and the axis 51a of the first shaft portion 51. The second distance d2 is the distance between the axis 3a of the rotating shaft 3 and the axis 52a of the second shaft portion 52. The third distance d3 is the distance between the axis 52a of the second shaft portion 52 and the axis 53a of the third shaft portion 53. The fourth distance d4 is the distance between the axis 53a of the third shaft portion 53 and the axis 51a of the first shaft portion 51.

According to the hinge structure of the fifth aspect, a more accurate free stop hinge is realized.

1 1st member 2 2nd member 3 Rotating shaft 3a Axis center 4 Link mechanism 51 1st shaft part 51a Axis center 52 2nd shaft part 52a Axis center 53 3rd shaft part 53a Axis center 61 1st link 62 2nd link 7 Spring mechanism 8 Container 80 Container body 81 Opening 9 Lid 9c Center of gravity d1 1st distance d2 2nd distance d3 3rd distance d4 4th distance P1 1st plane P2 2nd plane P3 3rd plane Ph horizontal plane

Claims (5)

The first member mounted on a container with an upward facing opening,
A second member attached to the lid for closing the opening, and
A rotating shaft that rotatably connects the first member and the second member,
A link mechanism for connecting the first member and the second member at a position different from the rotation shaft is provided.
The link mechanism
Includes a torsion coil spring mechanism configured to pull the lid up and apply torque to the second member in the opening direction.
The axis of the rotation shaft is provided so as to be located above the center of gravity of the lid when the lid is closed.
The link mechanism is a hinge structure configured to apply the torque to the second member so that the lid is stationary in an arbitrary posture including a posture in which the opening is closed. The link mechanism
The first shaft portion provided on the first member and
A first link rotatably connected to the first member via the first shaft portion, and
A second shaft portion provided on the second member and
A second link rotatably connected to the second member via the second shaft portion, and
A third shaft portion that rotatably connects the first link and the second link,
Including the spring mechanism provided so as to surround the outer periphery of the first shaft portion,
The link mechanism changes the torque according to the posture of the first link with respect to the first member, and causes the second member to stand still in an arbitrary posture including a posture in which the opening is closed. The hinge structure of claim 1, which is configured to provide the torque. The angle α formed by the plane including the axis of the rotation axis and the axis of the first axis and the plane including the axis of the rotation axis and the axis of the second axis is 45 ° or less. The hinge structure of claim 2 set in. The angle α formed by the plane including the axis of the rotation axis and the axis of the first axis and the plane including the axis of the rotation axis and the axis of the second axis is the rotation axis. Α = (40-β) × 1.2 (± 5) [ °] The hinge structure of claim 2 is set in a range that satisfies the relationship. A first distance d1 between the axis of the rotating shaft and the axis of the first shaft portion, and a second distance between the axis of the rotating shaft and the axis of the second shaft portion. The distance d2, the third distance d3 between the axis of the second axis and the axis of the third axis, the axis of the third axis, and the axis of the first axis. The fourth distance d4 from the axis is d1: d2: d3: d4 = 1 (± 10%): 1 (± 10%): 1.5 (± 20%): 1.4 (± 10). %) The hinge structure of claim 3 or 4 set in a range satisfying the relationship.

Images