JP2005348802A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure the braking at the time of turning of a lid to a body part with a simple structure. <P>SOLUTION: The damper device reduces the speed of tilting of the lid when the lid is tilted toward a position where the turning is terminated from a position where the turning is started. The damper device comprises a shaft 20 turnable inside a hole 10a of a casing 10 to integrally turn with the lid, and a damper part with a damping effect by reducing the speed of tilting of the lid when the lid is turned from the position where the turning is started toward the position where the turning is terminated. The damper part has a projection part 13 provided either in the shaft 20 or in the casing 10, and a sliding part 30 provided in the other member, the casing 10 or the shaft 20, to frictionally slide. The length of the sliding part 30 in the longitudinal direction of the shaft 20 is set so that the turning resistance of the shaft 20 becomes larger from the position where the turning of the lid is started toward the position where the turning of the lid is terminated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damper device, and more particularly to a damper device that performs a braking action by slowing the rotation speed of lids when the lids that open and close a main body portion are rotated by rotation. The damper device of the present invention can be suitably used for a toilet device for a toilet seat or a toilet lid, for example.

  As is well known, when the toilet seat (lids) attached to the toilet bowl (main body) so as to be openable and closable is in a closed position due to tilting due to its own weight, the toilet seat collides with the toilet bowl. In order to prevent the occurrence of this, a damper device has been conventionally provided that performs a buffering action by slowing the tilting speed of the tilting toilet seat. And as such a damper device, the cross section of the cam member provided integrally with the toilet seat is a umbilical type, and its three apexes are fitted to the holes of the boss member on the toilet bowl so as to be slidably rotatable, There are known ones that maintain the standing position of the toilet seat with respect to the toilet bowl and ensure braking when the toilet seat rotates with respect to the toilet bowl (see, for example, Patent Document 1).

In addition, in rice cookers and the like, a lid opening / closing device using rotation resistance caused by viscous fluid such as oil is known (see Patent Document 2).
JP 2001-37678 A JP-A-8-246742

  However, when it is intended to achieve both the maintenance of the standing position of the toilet seat with respect to the toilet and the securing of braking when the toilet seat rotates with respect to the toilet, the inside of the hole of the boss member that is in sliding contact with the three apexes of the cam member. The peripheral surface must be formed into a special shape. However, in consideration of accuracy control, the cam member having three vertex portions and the boss member having a hole on the inner peripheral surface that is in sliding contact with the three vertex portions are stopped at a desired position only by adjusting the sliding frictional force. Further, it is extremely difficult to maintain the gap between the cam member and the boss member so as to stop at a desired position for a longer period of time, and it is actually very difficult to manufacture a damper device having such a configuration.

  The present invention has been made in view of the above circumstances, and has a simple configuration. When the lids for opening and closing the main body are rotated from the rotation start position toward the rotation end position, It is a technical problem to be solved to provide a damper device capable of slowing the rotation speed.

(1) The damper device according to the first aspect of the present invention is a damper device that slows the rotation speed of the lids when the lids for opening and closing the main body are rotated so as to go from the rotation start position to the rotation end position. , A case having a hole provided in the main body, a shaft provided so as to be rotatable in the hole of the case and rotating integrally with the lids, and the lids rotating from the rotation start position When rotating toward the end position, it comprises a damper part that slows the rotation speed of the lids and performs a buffering action,
The damper portion includes a protrusion provided on one of the shaft and the case, and an elastic body having a sliding portion that is provided on the other of the shaft and the case and slides on the protrusion. The length of the sliding portion in the axial direction of the shaft is set so that the rotation resistance of the shaft is increased on the rotation end position side of the lids than on the rotation start position side of the lids. It is characterized by this.

  According to the damper device according to the first aspect of the present invention, the sliding in the axial direction of the shaft is increased so that the rotation resistance of the shaft is increased when the lid is rotated from the rotation start position toward the rotation end position. The length of the moving part is set. For this reason, the rotation resistance of the shaft increases when the lid rotates and moves from the rotation start position of the lid toward the rotation end position of the lid. Therefore, it is suppressed that a lid | cover hits a main-body part impactively, and a collision sound is suppressed. In addition, Preferably, a main-body part is a toilet bowl, and lids can be a toilet seat or a toilet lid.

(2) The damper device according to the second aspect of the invention includes the first lid and the second lid when the first lid and the second lid that open and close the main body portion are rotated from the rotation start position toward the rotation end position. In the damper device that slows the rotation speed of the second lids, the case having a hole provided in the main body and the first lids that are provided so as to be rotatable in the hole of the case rotate integrally. The first shaft that moves, the second shaft that is provided so as to be rotatable within the hole of the case, and rotates integrally with the second lid, and the first lid rotate from the rotation start position. When rotating toward the movement ending position, the first damper part that acts as a buffer by slowing the rotation speed of the first lids and the second lids from the rotation start position toward the rotation end position And a second damper portion that acts as a buffer by slowing the rotation speed of the second lid when rotating.
The first damper portion includes a first protrusion provided on one of the first shaft and the case, and a first slide frictionally slid on the first protrusion provided on the other of the first shaft and the case. A second elastic member provided on one of the second shaft and the case, and a second protrusion provided on the other of the second shaft and the case. And a second elastic body having a second sliding portion that frictionally slides on the second projecting portion,
The length of the first sliding portion in the axial direction of the first shaft is such that the rotation of the first shaft is closer to the rotation end position of the first lid than to the rotation start position of the first lid. The length of the second sliding portion in the axial length direction of the second shaft is set so as to increase the resistance, and the rotation of the second lid is greater than the rotation start position side of the second lid. It is characterized in that it is set so as to increase the rotational resistance of the second shaft on the end position side.

  According to the damper device of the second aspect of the present invention, when the first lid is directed from the rotation start position of the first lid toward the rotation end position of the first lid, the rotation resistance of the first shaft is increased. The length of the sliding portion in the axial direction of the first shaft is set. For this reason, when the first lid rotates and the first lid moves from the rotation start position toward the rotation end position, the rotation resistance of the first shaft increases. Therefore, it is suppressed that the 1st lid hits a main-body part shockingly, and a collision sound is controlled. Further, in the axial length direction of the second shaft, the second lid is configured to increase the rotation resistance of the second shaft when moving from the rotation start position of the second lid toward the rotation end position of the second lid. The length of the sliding part is set. For this reason, the rotation resistance of the second shaft increases when the second lid rotates and the second lid moves from the rotation start position to the rotation end position. Therefore, it is suppressed that the 2nd lid hits a main-body part shockingly, and a collision sound is controlled. The first protrusion and the second protrusion may be separate or may be integrally connected.

  Preferably, the main body portion may be a toilet, the first lid may be a toilet seat, and the second lid may be a toilet lid. A damper part is provided with the projection part provided in one of the shaft and the case, and the elastic body which has a sliding part which is provided in the other of the shaft and the case and slides frictionally on the projection part. Preferably, the protruding portion may be provided on the case and the sliding portion may be provided on the shaft. However, depending on the case, the protrusion may be provided on the shaft side and the elastic body may be provided on the case.

  According to the preferable aspect of the damper device according to the first and second inventions, the length of the sliding portion in the axial length direction of the shaft increases from the rotation start position of the lid toward the rotation end position of the lid. It is set to be long continuously or intermittently. Thereby, the rotation resistance of the shaft can be easily increased from the rotation start position of the lid toward the rotation end position of the lid.

  According to a preferred aspect, the elastic body has an engaging recess that is unevenly fitted to the protrusion when the lid is located at the rotation end position or the rotation start position. Accordingly, the lids can be easily held at the rotation end position (for example, the closed state) or the rotation start position (for example, the open state). In addition, when the frictional engagement force between the protrusion and the sliding part is strong, if the lids remain closed for a long time, the material constituting the sliding part will sag, and the material constituting the sliding part will deteriorate. There is a risk. In this case, when the lids are rotated to the main body side, the sliding contact force between the protrusion and the sliding portion is reduced, the rotational speed of the lids is increased, and the damper effect that slows the rotational speed of the lids May decrease. Therefore, according to a preferred aspect, the frictional engagement force between the protrusion and the sliding portion is reduced when the lid is located at the rotation end position or the rotation start position, such as when the lid is closed. Engaging force relaxation means is provided on the sliding portion or the case. This engagement force relaxation means can be comprised by the recessed part formed in the inside of a sliding part. Further, the engaging force relaxation means can be constituted by a soft part that is integrally provided on the sliding part and formed of a softer material than the main body of the sliding part. An example of the soft material is a porous material.

  Further, when the lids are in the rotation end position (for example, the lid closed position), the vicinity of the portion of the elastic body that faces the projections has a large frictional engagement force between the projections and the sliding parts. High sag resistance is preferred. Therefore, according to a preferred aspect, the sliding portion includes a first material portion that constitutes the main body of the sliding portion, and a second material that is formed of a material that has higher sag resistance than the material that constitutes the first material portion. The second material portion is set to face the protrusion when the lid is positioned at the rotation end position.

  According to the damper device of the present invention, it is possible to satisfactorily ensure braking when the lids are rotated with respect to the main body with a simple configuration. For this reason, it can contribute to the simplification of manufacture of a damper apparatus, and cost reduction.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

(First embodiment)
In the present embodiment, the present invention is applied to a toilet seat for a toilet bowl and a damper device for a toilet lid. As shown in FIG. 3, the damper device of the present embodiment, when the toilet seat 2 and the toilet lid 3 as lids capable of opening and closing the toilet bowl 1 are in the closed position due to tilting by their own weight from the standing open state, The tilting speed of the toilet seat 2 and the toilet lid 3 is slowed to achieve a buffering action. As shown in FIGS. 1 and 2, this damper device has a synthetic resin (or metal) case 10 and a synthetic resin (or metal) cylindrical shape that rotates integrally with the toilet seat 2. A first shaft 20 formed, a first elastic body 30 fixed to the outer peripheral surface of the first shaft 20, a second shaft 40 made of synthetic resin (or metal) that rotates integrally with the toilet lid 3, And a second elastic body 50 fixed to the outer peripheral surface of the second shaft 40.

  As shown in FIG. 3, a cover 4 is fixed to the upper surface of the rear part of the toilet 1. The case 10 is fixed to one end of the cover 4 in the toilet width direction by a bolt (not shown) so as not to rotate. As shown in FIG. 1, the case 10 includes a case main body 11 having a hole 10 a having a substantially circular inner peripheral surface and a case 11 fitted and fixed to one end 11 w in the axial direction of the case main body 11. And an end 12. And the other end 11x of the case main body 11 in the axial direction is provided with a bearing hole portion 11a for holding the first shaft 20 in a rotatable manner. The case end 12 is provided with a bearing hole 12a for holding the second shaft 40 so as to be rotatable.

  The first shaft 20 is made of a hollow tubular member, and one end 20w in the axial direction is inserted into the case 10 and held rotatably in the bearing hole 11a of the case body 11, and the other end 20x in the axial direction is formed. It is attached to a hinge portion (not shown) of the toilet seat 2 by fitting so as not to rotate. In addition, the fitting outer peripheral surface of the first shaft 20 and the fitting inner peripheral surface of the toilet seat 2 are paired in close contact with each other so as to reliably restrict the relative rotation of the first shaft 20 and the toilet seat 2. Opposing flat surfaces 20y (width of two surfaces) are respectively formed. In addition, an annular flange portion 21 protruding in the centrifugal direction is integrally formed on the outer peripheral surface of the first shaft 20 so as to abut against the case body 11 and restrict relative movement in the axial direction with respect to the case 10. A first elastic body 30 is fixed to the outer peripheral surface of one axial end 20 w of the first shaft 20. The first elastic body 30 is rotatably arranged in the hole 10a of the case 10, has a substantially cylindrical shape, and uses an organic elastic material (for example, a rubber material or a soft resin) as a base material. The first elastic body 30 rotates integrally with the first shaft 20.

  The second shaft 40 is inserted into the case 10 at one end 40 w in the axial direction and is rotatably held in the bearing hole 12 a of the case end 12, and the other end 40 x in the axial direction is a hinge of the toilet lid 3. It is attached to the part (not shown) by fitting so as not to rotate. Note that a pair of opposed flat surfaces 40y (width of two surfaces) are formed on the fitting outer peripheral surface of the second shaft 40, whereby the second shaft 40 and the toilet seat 2 can be rotated together. In addition, an annular flange portion 41 that protrudes in the centrifugal direction while abutting one axial end 20 w of the first shaft 20 is integrally formed on the outer peripheral surface of the second shaft 40. The flange portion 41 restricts relative movement in the axial direction of the first shaft 20 and the second shaft 40 with respect to the case 10. Here, the second shaft 40 has a sliding outer peripheral surface 44. The sliding outer peripheral surface 44 is provided on the other end side in the axial direction with respect to the annular flange portion 41, and has an outer diameter slightly smaller than the inner diameter of the first shaft 20. An inner peripheral surface 20i of the first shaft 20 is externally mounted on the sliding outer peripheral surface 44 so as to be relatively rotatable. The first shaft 20 has an outer peripheral surface 20o having a circular cross section. Similarly, the 2nd shaft 40 has the outer peripheral surface shape of a circular cross section.

  A second elastic body 50 is fixed to the outer peripheral surface of the second shaft 40 on the side of the one end 40 w in the axial direction. The second elastic body 50 is rotatably disposed in the hole 10a of the case 10, has a substantially cylindrical shape, and uses an elastic material (for example, a rubber material or a soft resin) as a base material. As shown in FIG. 2, a plurality of (two) protrusions 13 projecting radially inward are radially opposed to the inner peripheral surface of the hole 10a of the case body 11 (equally spaced in the circumferential direction). In) is protruding. Therefore, as shown in FIG. 2, the hole 10 a of the case body 11 is opposed to the plurality of (two) protrusions 13 that are provided so as to protrude in the radial direction (at equal intervals in the circumferential direction). And a plurality (two) of substantially circular arc inner peripheral surfaces 14. The number of protrusions 13 is not particularly limited, and may be three. The protrusion 13 extends along the axial length direction from one end in the axial direction to the other end in the axial direction in the hole 10 a of the case body 11.

  As shown in FIGS. 4 and 5, a plurality of (two) first sliding portions 32 bulging radially outward are formed coaxially on the outer peripheral surface of the first elastic body 30. The first damper portion is formed by a protrusion 13 provided on the case 10 and a first elastic body 30 having a first sliding portion 32 provided on the first shaft 20 and slidingly sliding with the protrusion 13. Yes. The first sliding portion 32 has a first friction surface 32m that frictionally slides with the tip 13x of the protruding portion 13, and a curved end surface 32c. The length L1 of the first sliding portion 32 of the first elastic body 30 in the axial length direction of the first shaft 20 increases from the rotation start position of the toilet seat 2 toward the rotation end position of the toilet seat 2. Is set to increase the rotational resistance. In other words, as shown in FIGS. 4 and 5, the length L1 of the first sliding portion 32 of the first elastic body 30 in the axial length direction of the first shaft 20 is determined from the rotation start position of the toilet seat 2. It is set so as to gradually become longer toward the rotation end position, that is, toward the direction of arrow W2.

  The first elastic body 30 is formed with the same number of first engaging recesses 34 as the protrusions 13 that are unevenly engaged with the protrusions 13. The first engaging recess 34 has a concave surface 34f. When the toilet seat 2 is in the open position (rotation start position, tilt start position), the protrusion 13 and the first engagement recess 34 are concavo-convexly fitted, and the release position of the toilet seat 2 is well maintained. In FIG. 2, the radius of the first elastic body 30 is indicated as R1. The radius of the first friction surface 32m of the first sliding portion 32 is indicated as R2. The relationship is R2> R1. When the turning radius of the tip 13x of the protrusion 13 is R3, the relationship is R2> R3> R1. The compression margin by the tip 13x of the protrusion 13 is indicated by β (see FIG. 2).

  6 and 7 show the second shaft 40 having the rotating second elastic body 50. As shown in FIGS. 6 and 7, a plurality of (two) second sliding portions 52 are bulged on the outer peripheral surface of the second elastic body 50, similarly to the first elastic body 30. The second sliding portion 52 has a second friction surface 52m that frictionally slides with the tip 13x of the protruding portion 13. The second damper portion includes a first protrusion provided on the case 10 and a protrusion 13 functioning as the second protrusion, and a second sliding portion 52 provided on the second shaft 40 and frictionally sliding with the protrusion 13. It is formed with the 2nd elastic body 50 which has. The length L2 of the second sliding portion 52 of the second elastic body 50 in the axial length direction of the second shaft 40 is the second as it goes from the rotation start position of the toilet lid 3 to the rotation end position of the toilet lid 3. The rotational resistance of the shaft 40 is set to gradually increase. In other words, as shown in FIGS. 6 and 7, the length L <b> 2 of the second sliding portion 52 of the second elastic body 50 in the axial length direction of the second shaft 40 is from the rotation start position of the toilet lid 3. It is set to gradually become longer as it goes to the rotation end position of the lid 3, that is, in the direction of the arrow W2. A plurality of (two) second engaging recesses 54 that are concavo-convexly engaged with the protrusion 13 are formed on the outer peripheral surface of the second elastic body 50. The second engagement recess 54 has a concave surface 54 f that engages with the tip 13 x of the protrusion 13. When the toilet lid 3 is in the open state, the protrusion 13 and the second engaging recess 54 are engaged with each other so that the opened position of the toilet lid 3 is well maintained.

  In use, in the damper device, when the toilet seat 2 stands up and is in an open state, as shown in FIG. 2, the protruding portion 13 of the case 10 that is fixed and the rotating first shaft 20 The first engagement recesses 34 of the first elastic body 30 engage with each other. Thereby, the standing position (the rotation start position, the tilt start position) of the toilet seat 2 with respect to the toilet bowl 1 is reliably held. Further, when the toilet lid 3 stands up and is in an open state, the protrusion 13 of the case 10 and the second engagement recess 54 of the second elastic body 50 of the second shaft 40 are engaged with each other. Thereby, the standing position (the rotation start position, the tilt start position) of the toilet lid 3 with respect to the toilet 1 is securely held.

  When the toilet seat 2 in the open state is urged by a user or an actuator so as to be in the closed position, the toilet seat 2 is tilted based on its own weight, and the engagement between the protrusion 13 and the first engagement recess 34 is released. The toilet seat 2 rotates in the direction. When the toilet seat 2 is tilted toward the toilet 1 in this way, the first shaft 20 and the first elastic body 30 together with the toilet seat 2 rotate integrally in the direction of the arrow W2, and the first sliding portion of the first elastic body 30 is moved. The first friction surface 32m of 32 and the tip 13x of the protrusion 13 are frictionally slid. At this time, the length L1 of the first sliding portion 32 of the first elastic body 30 in the axial direction of the first shaft 20 is changed from the rotation start position of the toilet seat 2 to the rotation end position (tilt end position) of the toilet seat 2. Since it is set to gradually increase as it goes, that is, in the direction of the arrow W2, the rotational resistance of the first shaft 20 gradually increases. In this case, since the first sliding portion 32 of the first elastic body 30 using the elastic material as a base material is compressed and deformed in the thickness direction thereof, an excellent braking action is achieved. For this reason, as the toilet seat 2 tilts in the closing direction, the tilting speed (rotation speed) of the toilet seat 2 decreases, and the toilet seat 2 can be prevented from colliding with the toilet 1 and the occurrence of a collision sound can be satisfactorily prevented. Can do.

  The same applies to the toilet lid 3. That is, when the toilet lid 3 in the open state is urged by a user or an actuator, the toilet lid 3 is tilted by its own weight, so that the toilet lid is released in a direction in which the protrusion 13 and the second engagement recess 54 are disengaged. 3 rotates. When the toilet lid 3 is thus rotated to the toilet 1 side, the second shaft 40 and the second elastic body 50 together with the toilet lid 3 are integrally rotated in the direction of the arrow W2, and the second elastic body 50 The second friction surface 52m of the two sliding portions 52 and the tip 13x of the protruding portion 13 frictionally slide. At this time, the length L2 of the second sliding portion 52 of the second elastic body 50 in the axial length direction of the second shaft 40 increases from the rotation start position of the toilet lid 3 toward the rotation end position of the toilet lid 3. In other words, the rotational resistance of the second shaft 40 increases because it is set to gradually increase in the direction of the arrow W2. In this case, since the second sliding portion 52 of the second elastic body 50 made of an elastic material is compressed and deformed in the thickness direction thereof, an excellent braking action is achieved. For this reason, as the toilet lid 3 tilts in the closing direction, the tilting speed of the toilet lid 3 becomes slow, the toilet lid 3 can be prevented from colliding with the toilet 1, and the occurrence of a collision sound can be well prevented. .

  According to the present embodiment, with such a simple configuration, the standing position of the toilet seat 2 (or toilet lid 3) with respect to the toilet 1 is maintained, and braking when the toilet seat 2 (or toilet lid 3) is rotated with respect to the toilet 1 is performed. The balance with securing can be achieved more reliably. Further, when the toilet seat 2 stands up and is in an open state, the protrusion 13 of the case 10 is engaged with the first engagement recess 34 of the first elastic body 30 so that the toilet seat 2 stands up with respect to the toilet 1 (the rotation). (Movement start position) can be held more reliably. When the toilet lid 3 stands up (rotation start position) and is in the open state, the protrusion 13 of the case 10 is engaged with the second engagement recess 54 of the second elastic body 50, so The standing position (rotation start position) of the lid 3 can be more reliably held. Further, the braking force on the toilet seat 2 is mainly defined based on the length L1 of the first sliding portion 32. The braking force for the toilet lid is mainly defined based on the length L2 of the second sliding portion 52. Since the above-described L1 and L2 are considerably larger than the thicknesses of the first sliding portion 32 and the second sliding portion 52, the accuracy management of L1 and L2 is easy, and as a result, the accuracy management of the braking action described above becomes easy. Its manufacture is also easy. In addition, although the protrusion part 13 of the 1st elastic body 30 does not rotate relatively, in FIG. 2, the form (closed position) in which the protrusion part 13 was relatively displaced with respect to the 1st elastic body 30 is virtually shown with the dashed line.

(Second Embodiment)
8 and 9 show a second embodiment. The second embodiment has basically the same configuration and the same function and effect as the first embodiment. In the following, different parts will be mainly described. FIG. 8 shows the positional relationship between the first sliding portion 32 and the tip 13x of the protrusion 13 when the toilet seat 2 is in the open state. When the toilet seat 2 is in an open state, as shown in FIG. 8, the protrusion 13 of the case 10 that is fixed and the first engagement recess 34 of the first elastic body 30 of the rotatable first shaft 20 are formed. The toilet seat 2 is held in an open state by engaging with each other. When the toilet seat 2 is in the closed position (rotation end position), when the frictional engagement force between the tip 13x of the projection 13 of the case 10 and the first elastic body 30 is strong, the first sliding portion of the first elastic body 30 32 is excessively compressed in the thickness direction by the tip 13x of the protrusion 13. For this reason, when the toilet seat 2 is maintained in the closed position (rotation end position) for a long time, such as during a long-term trip of the user or storage before market, the first sliding portion of the first elastic body 30 is used. There is a possibility that sag occurs in the material constituting the material 32 and deterioration of the material proceeds. When the material deteriorates in this way, when the toilet seat 2 is tilted toward the toilet 1, the sliding contact force between the tip 13 x of the protrusion 13 of the case 10 and the first sliding portion 32 of the first elastic body 30 may be reduced. is there. As a result, even if a damper device is provided, the braking effect (damper effect) against the tilt of the toilet seat 2 may be reduced. In this case, the tilting speed of the toilet seat 2 is increased, and in an extreme case, there is a possibility that the sound of the toilet seat 2 colliding with the toilet 1 may be increased. Therefore, in the present embodiment, when the toilet seat 2 is in the closed position (rotation end position), the frictional engagement force between the protruding portion 13 of the case 10 and the first sliding portion 32 of the first elastic body 30 is relaxed. The resultant force relaxation means is provided inside the first elastic body 30. As shown in FIGS. 8 and 9, the engagement force relaxation means is configured by a hole-like recess 70 formed in the vicinity of the first sliding portion 32 inside the first elastic body 30. The concave portion 70 is preferably formed at a portion where the length L1 of the first sliding portion 32 is large or in the vicinity thereof.

  As shown in FIG. 8, when the toilet seat 2 is in the closed position (rotation end position), the relative phase of the tip 13x of the protrusion 13 with respect to the first elastic body 30 is PS. Here, although the first elastic body 30 rotates about the axis P of the first shaft 20 as the toilet seat 2 rotates, the case 10 is fixed, so the circumferential direction of the protrusion 13 of the case 10 is fixed. The phase of does not actually fluctuate. However, in FIG. 8, it is assumed that the phase of the first elastic body 30 is fixed and the circumferential phase of the tip 13x of the protrusion 13 is rotated about the axis P to become the relative phase PS because of the drawing. Show. In FIG. 8, a virtual line that virtually connects the axis P of the first shaft 20 and the relative phase PS of the tip 13x of the protrusion 13 is defined as PC. The concave portion 70 can be disposed inside the first sliding portion 32 of the first elastic body 30 such that the center 70c of the concave portion 70 is at an angle θ1 within plus or minus 30 degrees with respect to the virtual line PC. However, it is preferable that the center 70c of the recess 70 is not positioned on the virtual line PC. That is, it is preferable that the center 70c of the recess 70 and the tip 13x of the protrusion 13 do not directly face each other. This is because it is difficult to obtain a high frictional engagement force by the tip 13x of the protrusion 13.

  According to the present embodiment, the first elastic body 30 is configured even when the toilet seat 2 is maintained in the closed position (rotation end position) for a long time due to the long-term travel, storage, and the like of the user. The over-compression of the material to be performed is suppressed, the progress of sag of the material is suppressed, and the deterioration of the material is suppressed. Therefore, when the toilet seat 2 is tilted to the toilet 1 side, it is possible to suppress a decrease in the sliding contact force between the protruding portion 13 of the case 10 and the first sliding portion 32 of the first elastic body 30, and the damper effect (damper) Effect) can be maintained well over a long period of time. In FIG. 8, the concave portion 70 is formed by a circular hole in cross section, but the cross sectional shape is not particularly limited, and may be any of a square, a triangle, a rhombus, an ellipse, an ellipse, and the like. The same applies to the second elastic body 50 of the second shaft 40. Therefore, as shown in FIG. 9, the second sliding portion 51 of the second elastic body 50 also has a recess 70 as an engaging force relaxation means. Is formed.

(Third embodiment)
10 and 11 show a third embodiment. The third embodiment has basically the same configuration and the same function and effect as the first embodiment. In the following, different parts will be mainly described. FIG. 10 shows the positional relationship between the first elastic body 30 and the tip 13x of the protrusion 13 when the toilet seat 2 is opened. In FIG. 8, the protrusion 13 of the case 10 and the first engagement recess 34 of the first elastic body 30 of the first shaft 20 are engaged with each other. According to the present embodiment, instead of the above-described recess 70 forming the space, the soft portion 71 formed of a porous body such as a foam material having a large number of micropores is provided as the engaging force relaxation means. The soft part 71 is made softer than the material constituting the main body of the first elastic body 30. Thus, since the soft part 71 is formed in the inside of the 1st elastic body 30, even when the toilet seat 2 is maintained in a closed position over a long period, the 1st elastic body 30 side of the 1st elastic body 30 The excessive tightening allowance is eliminated. The soft part 71 may be formed of a rubber material.

  Even when the toilet seat 2 is maintained in the closed position (rotation end position) for a long time due to the user's long-term travel, storage, etc., the sag of the material constituting the first elastic body 30 proceeds. Is suppressed. Therefore, when the toilet seat 2 is tilted to the toilet 1 side, it is possible to suppress a decrease in the sliding contact force between the protruding portion 13 of the case 10 and the first elastic body 30 of the first elastic body 30, and the damping effect (damper) of the damper device can be suppressed. Effect) can be maintained well over a long period of time. Since the same can be said for the second sliding portion 52 of the second elastic body 50, the soft portion 71 as the engaging force relaxation means is also formed for the second sliding portion 52 of the second elastic body 50. Is.

  The soft part 71 is preferably formed at or near a site where a large compressive force acts. Therefore, it is preferable to form the soft part 71 in a part where the length L1 of the first sliding part 32 is large or in the vicinity thereof. Therefore, as shown in FIG. 10, when the toilet seat 2 is in the closed position, the phase of the tip 13x of the protrusion 13 with respect to the first elastic body 30 is PS. If the virtual line PC virtually connects the axis P of the first shaft 20 and the relative phase PS, the center 71c of the soft portion 71 is at an angle θ1 within plus or minus 30 degrees with respect to the virtual line PC. The soft portion 71 can be disposed on the surface. However, it is preferable that the center 71c of the soft portion 71 is not positioned on the virtual line PC.

(Fourth embodiment)
FIG. 12 shows a fourth embodiment. The fourth embodiment has basically the same configuration and the same function and effect as the second embodiment. In the following, different parts will be mainly described. FIG. 12 shows the positional relationship between the first sliding portion 32 and the protrusion 13 when the toilet seat 2 is opened. When the toilet seat 2 is opened, as shown in FIG. 12, the first engaging recess 34 and the projection 13 of the first elastic body 30 are engaged with each other. Position) is reliably maintained. The first elastic body 30 is made of a rubber material (for example, silicone rubber) having better sag resistance than the rubber material (for example, EPDM rubber) constituting the main body of the first elastic body 30 instead of the recess 70 described above. The formed second material part 72 is provided. The second material portion 72 may be formed of a porous material such as a foaming material.

  When the toilet seat 2 is in the closed position (tilting end position), the relative phase of the tip 13x of the protrusion 13 with respect to the first elastic body 30 is PS as shown in FIG. Although the first elastic body 30 rotates around the axis P of the first shaft 20 as the toilet seat 2 rotates, the phase of the tip 13x of the protrusion 13 does not change because the case 10 is fixed. However, in FIG. 12, for the sake of convenience, the phase of the first elastic body 30 is fixed, and the phase of the tip 13x of the protrusion 13 is rotated about the axis P to become the relative phase PS. A second material portion 72 is disposed on a virtual line PC that virtually connects the axis P of the first shaft 20 and the relative phase PS. Since the second material portion 72 has higher sag resistance than the first material portion 30r forming the main body portion of the first elastic body 30, the frictional engagement force by the first sliding portion 32 is favorably maintained over a long period of time. Is advantageous. As a result, even if the toilet seat 2 is maintained in a closed state for a long time due to the user's long-term travel, storage, etc., it is suppressed that the first elastic body 30 sags, Deterioration of the first elastic body 30 is suppressed. Therefore, when the toilet seat 2 is tilted toward the toilet 1, the sliding contact force between the protrusion 13 of the case 10 and the first elastic body 30 can be suppressed, and the damper effect of the damper device can be maintained well over a long period of time. Can do. In addition, since a rubber material (for example, silicone rubber) with good sag resistance is often expensive, as described above, if it is partially used in a portion where the compressive force acts most in the first elastic body 30, Costs can be reduced while improving durability. Since the second material portion 72 is embedded and covered with the first material portion 30r that forms the main body portion of the first elastic body 30, it is advantageous in suppressing the generation of cracks in the second material portion 72. Since the same can be said for the second elastic body 50, the second elastic body 50 also has a rubber material (for example, silicone rubber) having better sag resistance than the rubber material (for example, EPDM rubber) of the second elastic body 50. ) Is formed.

  The damper device of the present invention is not limited to the toilet seat toilet lid device, but can be applied to various lidded structures such as a lid of a washing machine or a dishwasher, a lid of a box such as a grope box provided in the vicinity of a vehicle seat. .

It is sectional drawing which shows the whole structure of the damper apparatus of 1st Embodiment, and follows the A1-A1 line | wire of FIG. FIG. 4 is a cross-sectional view of the damper device according to the first embodiment, cut along a first sliding portion. It is a side view which shows the toilet bowl with which the damper apparatus of 1st Embodiment is mounted | worn. FIG. 4 is a side view of the damper device according to the first embodiment in the vicinity of a first sliding portion of a first shaft. FIG. 5 is a perspective view of the damper device according to the first embodiment, in the vicinity of a first sliding portion of a first shaft. FIG. 6 is a side view of the damper device according to the first embodiment and in the vicinity of a second sliding portion of a second shaft. FIG. 4 is a perspective view of the damper device according to the first embodiment and in the vicinity of a second sliding portion of a second shaft. It is the cross-sectional view which concerns on the damper apparatus of 2nd Embodiment, and was cut in the part of the 1st sliding part. FIG. 9 is a cross-sectional view taken along line A9-A9 in FIG. 8 according to the damper device of the second embodiment. It is a transverse cross section concerning a damper device of a 3rd embodiment, and was cut in the part of the 1st sliding part. It is sectional drawing which shows the whole structure of the damper apparatus of 3rd Embodiment, and follows the A11-A11 line | wire of FIG. FIG. 10 is a cross-sectional view of a damper device according to a fourth embodiment, cut at a first sliding portion.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 is a toilet bowl (body part), 2 is a toilet seat (lids), 3 is a toilet lid (lids), 10 is a case, 10a is a hole, 13 is a protrusion, 20 is a 1st shaft, 30 is a 1st slide The moving part, 40 is a second shaft, 50 is a second sliding part, 70 is a recess (engagement force relaxation means), 71 is a soft part (engagement force relaxation means), and 72 is a second material part.

Claims (10)

In the damper device that slows the rotation speed of the lids when the lids for opening and closing the main body part are rotated from the rotation start position toward the rotation end position,
A case provided in the main body and having a hole, a shaft provided so as to be rotatable in the hole of the case and rotating integrally with the lids, and the lids starting the rotation A damper part that performs a buffering action by slowing the rotation speed of the lids when rotating from a position toward the rotation end position;
The damper portion includes a protrusion provided on one of the shaft and the case, and an elastic body having a sliding portion provided on the other of the shaft and the case and sliding on the protrusion. It has
The length of the sliding portion in the axial length direction of the shaft increases the rotation resistance of the shaft on the rotation end position side of the lids than on the rotation start position side of the lids. A damper device characterized by being set to be   In Claim 1, The length of the said sliding part in the axial length direction of the said shaft is set so that it may become long as it goes to the said rotation end position of the said lids from the said rotation start position of the said lids. A damper device characterized by comprising:   3. The damper device according to claim 1, wherein the elastic body includes an engagement recess that is engaged with the protrusion when the lid is located at the rotation start position.   The damper device according to any one of claims 1 to 3, wherein the main body portion is a toilet and the lids are a toilet seat or a toilet lid.   5. The engagement force according to claim 1, wherein when the lids are located at the rotation end position or the rotation start position, the friction engagement force between the protrusion and the sliding portion is reduced. A damper device, wherein a relaxation means is provided in the sliding part or the case.   6. The damper device according to claim 5, wherein the engagement force alleviating means is constituted by a concave portion formed inside the sliding portion.   7. The engagement force relaxation means according to claim 5, wherein the engagement force relaxation means is formed of a soft portion that is provided integrally with the sliding portion and is made of a softer material than the main body of the sliding portion. Damper device characterized. The sliding part according to any one of claims 1 to 7, wherein the sliding part is more resistant to the first material part constituting the main body of the sliding part and the material constituting the first material part. A second material portion made of a highly elastic material,
The damper device according to claim 1, wherein the second material portion is set to face the protrusion when the lid is located at the rotation end position or the rotation start position. When the first lid and the second lid that open and close the main body are rotated from the rotation start position toward the rotation end position, the rotation speed of the first lid and the second lid is decreased. In the damper device,
A case provided in the main body and having a hole; a first shaft provided so as to be rotatable in the hole of the case; and rotating integrally with the first lid; A second shaft provided so as to be rotatable in the hole and rotated integrally with the second lids, and the first lids from the rotation start position to the rotation end position. When the first lids are rotated, the first damper part that acts as a buffer by slowing the rotation speed of the first lids and the second lids rotate from the rotation start position toward the rotation end position. And a second damper part that performs a buffering action by slowing the rotation speed of the second lids,
The first damper portion includes a first protrusion provided on one of the first shaft and the case, and a friction slide on the first protrusion provided on the other of the first shaft and the case. A first elastic body having a first sliding portion that moves,
The second damper portion includes a second protrusion provided on one of the second shaft and the case, and a friction slide on the second protrusion provided on the other of the second shaft and the case. A second elastic body having a second sliding portion that moves,
The length of the first sliding portion in the axial direction of the first shaft is closer to the rotation end position of the first lid than to the rotation start position of the first lid. Set to increase the rotational resistance of the first shaft;
The length of the second sliding portion in the axial length direction of the second shaft is closer to the rotation end position of the second lid than the side of the rotation start position of the second lid. The damper device is characterized in that it is set so as to increase the rotational resistance of the second shaft.   The damper device according to claim 9, wherein the main body is a toilet, the first lid is a toilet seat, and the second lid is a toilet lid.

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