JP3053583B2 - Dual rotary damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual-unit system in which two dampers are provided in one casing to apply a braking force to two lids and doors when opening and closing a toilet seat and a toilet lid of a Western style toilet, for example. It relates to a rotary damper.

[0002]

2. Description of the Related Art Conventionally, in order to suppress the impact due to a collision when a lid or a door is rapidly opened and closed, a rotary damper for suppressing an impact is attached to the lid or a door. As such a rotary damper, a type utilizing a flow resistance of a viscous fluid, which has a structure in which a rotary member is incorporated in a cylindrical casing filled with a viscous fluid and the rotary member rotates while sliding on an inner wall surface, is proposed. Have been. This rotary member has a structure in which a valve member is covered with a notched ridge provided on an outer peripheral surface of a rotary shaft, for example, and a notched fluid flow path is provided on one of the hanging walls of the valve member. When the rotating member rotates in the direction of the notch-shaped flow path, the viscous fluid flows through the bypass flow path formed by this notch and the notch formed in the rotating member. Since the bypass flow path is closed, the flow of the viscous fluid is restricted and the torque becomes high, and a braking force is applied to the lid or the door.

Japanese Patent Laid-Open No. 5-296267 discloses a rotary damper having a structure as described above, in which a partition for dividing the inside of the cylindrical casing into two in the axial direction and a partition for dividing the inside of the cylindrical casing into two in a semicircle are provided. First and second having control walls on both sides of the part
A dual-type rotary damper having a structure in which a control shaft is provided and a control valve is covered on the control wall is disclosed. In this rotary damper, the first rotary shaft connected to the toilet lid and the second rotary shaft connected to the toilet seat are provided side by side in the axial direction and are concentric with each other. Can be Further, since these rotating shafts are arranged substantially symmetrically with respect to the axis and are concentric, the bending strength of the rotating shaft can be improved.

[0004]

However, in the conventional double rotary damper, when one of the rotary members is assembled during assembly, the chambers on both sides of the partition do not communicate with each other.
Each chamber must be separately filled with a viscous fluid, which has the disadvantage of complicating the assembly process. Further, since the braking forces of the two rotary dampers act independently without affecting each other, there is a limit in further reducing the torque when opening the lid or the door. Therefore, there has been a demand for a dual rotary damper which can simplify the assembling process and lower the torque when opening.

[0005]

According to a first aspect of the present invention, there is provided a dual rotary damper according to the present invention.
A cylindrical casing having a chamber therein, a rotating member partially housed in the chamber, a viscous fluid filled in the chamber, and a fluid torque for generating a high torque or a low torque depending on a rotation direction of the rotating member. A pair of control means
A rotary damper is axially connected through a gap, and
A communication hole communicating between the two chambers of the pair of rotary dampers.
In the dual rotary damper provided in the separation section , the rotary section
First half area when the material rotates in the direction that generates high torque
When rotating in a direction that generates low torque.
In a predetermined range of the latter half area, the pressure side of each chamber is reduced.
It is characterized by communicating with the compression side .

[0006] In such a rotary damper, a communication hole for communicating the two chambers is provided in the space, so that only one injection step is required to fill the cylindrical casing with a viscous fluid during assembly. Further, by selecting the position where the communication hole is provided, it is possible to further reduce the torque when opening the lid or the door.

Furthermore, with a half area when rotated in a direction of rotating member to generate a high torque, <br/> Oite a predetermined range of the second half area when rotated in a direction to generate a low torque, the Compression holes and pressure reduction in each chamber by communication holes
It was made to communicate with the side . Therefore, when rotating in the direction to generate high torque, low torque can be generated in the first half region , while when rotating in the direction to generate low torque, lower torque is generated in the second half region than in the first half region. It becomes possible.

According to the second aspect, the cylindrical casing closes the outer end of one chamber and has an opening at the outer end of the other chamber, and the first casing partially accommodated in the one chamber. The rotating member is
A hole provided at the center of the partition penetrates through a second rotating member partially accommodated in the other chamber, and projects out of the casing from the opening together with the second rotating member.
Thus, for example, two dampers, such as a toilet lid and a toilet seat, that apply braking force to two lids and doors, respectively, can be provided in one cylindrical casing. In addition, the first rotating member is penetrated into the second rotating member so that the two can rotate around concentric axes, whereby the bending strength of the rotating member is improved.

[0009] provided in claim 3, the convex portion on the inner circumferential surface projecting along the axial direction of the chamber, respectively, each rotating member and projections projecting from the outer peripheral surface, the rotary member is covered to the ridge and so and a rotatable valve body integrally with engaging with said projections with the rotation. The magnitude of the generated torque can be changed by changing the engagement between the ridge and the valve body depending on the rotation direction of the rotating member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 5 show a first configuration example of a dual rotary damper according to the present invention, FIG. 1 is a sectional view showing an internal structure, FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 4 is a sectional view taken along the line BB of FIG. 1, FIG. 4 is an exploded perspective view showing the structure of the rotary member and the valve member housed in the first chamber, and is an exploded perspective view from the upper left in FIG. FIG. 2 is an exploded perspective view showing the structure of a rotating member and a valve member to be viewed from the upper right in FIG. 1.

As shown in FIGS. 1 to 4, a dual rotary damper 1 according to the present invention has one end opened and the other end closed, and a first chamber 21 and a second chamber 21 in the axial direction. The first casing 21 and the second chamber 22 include rotating members 31 and 32 each of which is partially incorporated in the first casing 21 and the second chamber 22. A viscous fluid 5 such as so-called silicon oil is filled and sealed.

As shown in FIG. 1, a first chamber 21 and a second chamber 2
2 is partitioned by a disk-shaped partition 6 having a hole 6a provided substantially at the center of the cylindrical casing 2 in the axial direction.
One end of the cylindrical casing 2 is sealed by a cap 7, and a perforated cap 8 is attached to the other end, and both the rotating members 31 and 32 project out of the casing from the hole 8a. Although FIG. 2 shows a case where the partition 6 is provided at a substantially central portion of the cylindrical casing 2 in the axial direction, the position is shifted from the central portion by a set torque value generated in each chamber. You may. The rotating member 32 is hollow, and a portion of the rotating member 31 that is not accommodated in the first chamber 21 protrudes out of the casing from the hole 6 a of the partition 6 through the hollow portion. The rotating members 31 and 32 are rotatable around the central axis O of the cylindrical casing 2 around the concentric axis. However, there is a slight gap between the outer peripheral surface of the rotating member 31 and the inner peripheral surface of the rotating member 32. Since the gap is provided, there is no rotation such that one rotation is accompanied by the other rotation. A sealing member 10a such as an O-ring is provided between the rotating member 31 and the rotating member 32.
And disposed, so as to prevent from between these axes leaking viscous fluid 5 between the two chambers. Note that in FIG.
1, a sealing groove 9a is formed on the outer peripheral surface, and a sealing member 10a is fitted in the sealing groove 9a.
May be sealed by forming a sealing groove 9a on the inner peripheral surface of the member and fitting the sealing member 10a.

The rotating members 31 and 32 in the cylindrical casing 2
Each of the outer peripheral surfaces near the cap has a sealing groove 9.
b, 9b are formed, and sealing members 10b, 10b such as O-rings are fitted therein. Rotating member 31
A detent is formed at the tip of the toilet seat, and this detent part is fitted into the pivot shaft of the toilet seat (not shown) and is connected and fixed to the toilet seat, and the rotating member 32 is similarly connected and fixed to the toilet lid (not shown). In this way, an external member such as a toilet lid to be braked is connected to the rotary damper 1.

Next, the structure of the damper will be further described with reference to FIGS. The rotating member 31 is provided with first ridges 31a, 31a protruding from the outer peripheral surface along the axial direction at equal intervals, and is covered with these ridges, respectively. One ridge 31a, 31a
And two first valve bodies 41, 41 which rotate while engaging with the first valve body. A notch p is formed at the middle of the top of the ridge 31a in the axial direction. The valve element 41 is formed of a cover valve having a substantially U-shaped cross section. The valve element 41 is covered with play in the rotational direction on the upper part of the ridge 31a, and its outer peripheral portion is in close contact with the inner peripheral surface of the cylindrical casing 2. ing. A notch q along the axial direction is formed in one of the right and left hanging walls 41a and 41b of the valve member 41, and a notch is formed in the other hanging wall 41b. Not formed.

As shown in FIG. 2, the first chamber 2
Two communication holes 6b, 6b communicating the first and second chambers 22 are provided at equal intervals. As shown in the figure, these communication holes 6b, 6b are formed in an arc shape that is substantially concentric with the top surface of the ridge 31a, and the outer arc surface s is flush with the top surface of the ridge 31a. Such a structure is particularly preferable.
The shape of the communication hole 6b is not particularly limited, such as an arc-shaped long hole as shown in the figure, a round hole, a square hole, and the like, and a plurality of small communication holes may be provided.

The position of the communication hole 6b in the circumferential direction is within a predetermined range in the first half region of rotation when the rotating member 31 rotates in the direction of generating high torque, and rotates in the direction of generating low torque. When you rotate
In a predetermined range in the latter half area , the first chamber 21 and the second chamber 21
There is no particular limitation as long as the position communicates with the chamber 22. For example, as shown in FIG.
Is formed so as to extend from a position where a left end surface of a protrusion 23 described later located at the upper right in the drawing and one end t in the circumferential direction are flush with each other, to a position intermediate between the protrusions 23 and 23,
On the other hand, the lower communication hole 6b in the figure starts from a position where the right end face and the end t of the projection 23 located at the lower left in the figure are flush with each other, and extends to near the middle between the projections 23, 23. It is formed as follows. As described above, it is preferable to be provided over the entire range in the first half region of the rotation. In the case where two projections 23 are provided at equal intervals as in this embodiment, the rotation angle of the rotating member 31 that rotates between them is 120 °.
Therefore, the communication hole 6b is provided at an intermediate degree between the projections 23, 23, that is, within a range of about 60 ° at an angle around the axis O, and this angle is preferably about 60 °.
The structure such that one end face flush end t of the communication hole 6b projections 23, i.e. preferred structure as communicating with the initial rotation of the rotary member 31, is not necessarily such a structure Good . When one or three or more projections 23 are provided, the angle may be set to an appropriate angle accordingly.

On the inner surface of the cylindrical casing 2, two projections 23 are provided at equal intervals along the axial direction. The projection 23 also has a role of stopping the rotation of the valve member 41 and a role of separating the projections 23 from each other into a pressurizing chamber 21a and a depressurizing chamber 21b via a ridge 31a. The number of such protrusions 23 may be set according to the purpose, and a slight gap may be provided between the protrusion surface and the outer peripheral surface of the rotating member to reduce the generated torque. Further, as shown in FIG. 4, a groove r is formed on the outer peripheral surface of the rotating member 31, and when the groove r passes through the protrusion 23, a bypass flow of the viscous fluid 5 is formed between the groove r and the upper surface of the protrusion 23. A route may be secured to reduce the generated torque. In this embodiment, the protrusions 23,
Although the valve element 41 constitutes a fluid torque control means, such a control means is not particularly limited, and any structure may be used as long as high torque and low torque can be generated depending on the rotation direction of the rotating member. You may.

With the opening and closing of the toilet seat, the rotating member 31 and the valve member 4
1 operates as follows. When the toilet seat is completely open, the two ridges 31a are on the line XX in FIG. When the toilet seat is closed from this state, the rotating member 31
23 rotates counterclockwise in FIG. First,
The ridge 31a on the XX line has one end surface in contact with the one protrusion 23 via the hanging wall 41a of the valve member 41, and when slightly rotated from this state, the other end surface is brought into contact with the valve member. 41 is in contact with the hanging wall 41b. Thereafter, the valve member 41 is rotated while pressing the other end face against the hanging wall 41b, and rotates until it comes into contact with the other protrusion 23 via the hanging wall 41b of the valve member 41.

At this time, the ridge 31a is
b, the pressure chamber 21a and the decompression chamber 21b
Is communicated through the communication hole 6b of the separating portion 6, and the torque generated by securing the bypass flow path of the viscous fluid 5 by such communication in the first chamber 21 is low. Therefore, the toilet seat closes relatively rapidly during this time. Next, between the time when the ridge 31a passes through the communication hole 6b and the time when the ridge 31a comes into contact with the projection 23, the pressurizing chamber 21a and the decompression chamber 21b are not in communication via the communication hole 6b. The hanging wall 4 of the valve member located on the pressure chamber 21a side
Since the notch q is not formed in 1b, the flow path of the viscous fluid 5 is secured in the chamber 21 through a small gap formed between the upper surface of the valve member 41 and the inner peripheral surface of the chamber 21. It is just done. As a result, a very large rotational resistance is exerted, and the generated torque is high. Therefore, during this time, the braking force acts as the toilet seat falls,
It does not close slowly and slowly and hit the toilet bowl suddenly. As described above, when the toilet seat is closed, the first half is relatively sharply closed, and the braking force is applied from the second half, and the toilet seat is slowly closed.

On the other hand, when the toilet seat is completely closed, the two ridges 31a are on the line YY in FIG. When the toilet seat is opened from this state, the rotating member 31 rotates clockwise between the protrusions 23 in FIG. First, the ridge 31a on the line Y-Y has one end face in contact with one projection 23 via the hanging wall 41b of the valve member 41, and when slightly rotated from this state, the other end face is It contacts the hanging wall 41a of the valve member 41. Thereafter, the other end face is pressed against the hanging wall 41a and the valve member 41 is rotated together with the other projection 2 via the hanging wall 41a of the valve member 41.
Rotate until it touches 3.

At this time, while the ridge 31a rotates from the state in contact with the one protrusion 23 to the communication hole 6b, the notch q is formed in the hanging wall 41a of the valve member located on the pressurizing chamber 21b side. Is formed, a bypass flow path for the viscous fluid 5 communicating from the notch q to the notch p at the top of the ridge 31a is secured from the pressurizing chamber 21b side to the decompression chamber side 21a. . As a result, the rotation resistance is hardly exhibited, and the generated torque is low. Next, the ridge 31
While the is rotated along the communication hole 6b of the separating portion 6, the above-described bypass flow path is secured by the notches q and p,
The bypass passage formed by the communication hole 6b of the partition 6 also has a pressure chamber 21a.
And the pressure is reduced so as to communicate with the pressure reducing chamber 21b, so that the rotational resistance is further reduced and the generated torque is further reduced. In FIG. 2, the formation position of the communication hole 6 b in the separation portion 6 starts from one end surface of one of the protrusions 23,
The protrusions 23 extend to near the center between the protrusions 23. However, it is not limited to such a formation position to exert the above-described effects. In other words, the communication hole 6b need not be formed even in a portion close to the other protrusion 23 so that a braking force is exerted immediately before the toilet seat is completely closed, and a lower torque can be obtained in the latter half region where the toilet seat is opened. Thus, it is only necessary to be formed on the one protrusion 23 side from the center. For example, it may be formed so as to start from one end surface of one of the projections 23 and extend to a position beyond the center between the projections 23, 23, and the end t does not contact one end surface of the one of the projections 23. Is also good.

As described above, when the toilet seat is opened, the portion having low torque in the first half region is changed to the second half region and the torque is further reduced, so that the toilet seat can be opened with a very small force. In order to fill each chamber with a viscous fluid at the time of assembling a conventional damper, the rotation member 31 and the valve member 4 are provided in the first chamber 21.
After incorporating 1, the viscous fluid 5 is injected into the first chamber 21,
Next, the rotating member 32 and the valve member 42 are assembled into the second chamber 22, and then the viscous fluid 5 is injected into the second chamber 22.
One injection operation was required. In assembling the damper of the present invention, the viscous fluid 5 injected from the second chamber 22 side also fills the first chamber 21 side through the communication hole 6b when the rotating member and the valve member are incorporated into each chamber. Therefore, both chambers can be filled with the viscous fluid 5 by only one injection operation.

Next, FIGS. 3 and 5 illustrate the structure of the damper connected to the toilet lid, which is similar to the case where the damper is connected to the toilet seat. 3 is a sectional view showing the inside of the second chamber 22, and FIG. 5 is an exploded perspective view seen from the upper right in FIG. Similarly to the rotating member 31, the rotating member 32 includes ridges 32a, 32a and valve bodies 42, 42 respectively engaged with the ridges 32a, 32a.
Two projecting ridges 32a protruding along the axial direction are also formed at equal intervals on the outer peripheral surface of the rotating member 32, and a notch p is formed at an intermediate portion of the top in the axial direction. Also, a groove r for reducing torque is provided. The valve member 42 is the valve member 4
A hanging wall 4 having the same shape as that of 1 and having a notch q formed therein.
2a and 42b not formed.

As shown in FIG. 3, the gap 6 is the same as that shown in FIG. 2 as viewed from the opposite side in the axial direction. Note that FIG. 2 is a cross section viewed from the left side in FIG. 1, while FIG. 3 is a cross section viewed from the right side in FIG. Therefore, the positions of the projections 23 and 24 are shown in symmetrical positions in both figures.

Rotating member 32 and valve member 4 for opening and closing the toilet lid
The operation of the rotation member 31 and the valve member 4 accompanying opening and closing of the toilet seat
The operation is the same as the operation of 1. When the toilet lid is completely opened, the two ridges 32a are on the line XX in FIG.
When the toilet seat is closed from this state, the rotating member 3
Reference numeral 2 rotates clockwise between the projections 24 in the figure. At this time, while the ridge 32a rotates along the communication hole 6b of the partition 6, the pressurizing chamber 22a and the decompression chamber 22b communicate with each other through the communication hole 6b. As a result, the torque generated when the bypass flow path is secured by this communication becomes low, and the toilet seat closes relatively rapidly. On the other hand, after the ridge 32a passes through the communication hole 6b, the projection 24
Until it contacts the second chamber 22, the aforementioned chamber 21
In the same manner as described above, only the flow path of the viscous fluid 5 is secured through a slight gap between the valve member 42 and the inner peripheral surface of the chamber 22, and the generated torque becomes high. Accordingly, during this time, a braking force acts as the toilet lid falls, and the toilet lid closes slowly and slowly. Even when closing the toilet lid as described above, the first half region like the toilet seat are relatively abruptly closed consisted half region <br/> to close slowly worked braking force.

On the other hand, when the toilet lid is completely closed, the two ridges 32a are on the line YY in FIG. 3, and when the toilet lid is opened from this state, the rotating member 32 has the projections 24, 24.
The space rotates counterclockwise in FIG. At this time,
Between the contact with one of the protrusions 24 and the communication hole 6b, the notch q of the vertical wall 42a of the valve member 42 and the ridge 3
The notch p at the top of 1a secures a bypass flow path for the viscous fluid 5 communicating from the pressurizing chamber 22b side to the depressurizing chamber side 22a, so that little rotational resistance is exerted and the generated torque is small. Low torque. Next, during the rotation of the ridge 32a along the communication hole 6b of the partition 6, the rotation resistance is further reduced as in the case of the toilet seat, and the generated torque is further reduced. Even when the toilet lid opens as described above,
Since the torque which was initially low in torque becomes the latter half region and the torque is further reduced, it can be opened with a very small force.

Next, a second embodiment of the present invention will be described with reference to FIG. 6 only for parts different from the first embodiment.
Both ends of the cylindrical casing 2 of the damper 1 of this configuration example are open. The partition 6 has a disk shape without a hole,
The first chamber 21 and the second chamber 22 are partitioned in the axial direction. The first chamber 21 and the second chamber 22 are symmetrical with respect to the partition 6. Part of the rotating members 31 and 32 that engage with the valve members 41 and 42 are accommodated in both chambers, respectively.
The remainder of these rotating members 31, 32 protrudes out of the casing from the holes 7a, 8a of the perforated caps on the respective side. In the outer peripheral portion of the partition 6, communication holes 6b similar to those in the first configuration example are provided at equal intervals, and communicate the first chamber 21 and the second chamber 22. Note that, in this example, the rotating member 31,
32 need not be concentric. The operation of the rotating members 31, 32 and the valve members 41, 42 involved in opening and closing the toilet seat and the toilet lid,
This is the same as in the first configuration example. Also, since the rotating member does not have a double structure, the bending strength of the rotating member is not as high as in the first configuration example, but only one injection step is required to fill each chamber with the viscous fluid 5. The same effect as in the first configuration example can be obtained.

[0028]

As described above, the dual rotary damper according to the present invention is characterized in that, in the first aspect, a cylindrical casing having a chamber therein, a rotating member partially housed in the chamber, Depending on the filled viscous fluid and the rotation direction of the rotating member,
Torque control to generate high or low torque
And a pair of rotary dampers provided with
Between the two chambers of the pair of rotary dampers.
Rotary damper provided with a communication hole communicating with the rotary member in the gap portion
In the direction in which the rotating member generates a high torque,
It is the first half of the rotation and generates low torque.
In the predetermined range of the latter half area when rotating in the
It is characterized in that the pressurized side and the depressurized side in each chamber are communicated.
You. Thereby, the injection step only needs to be performed once to fill the cylindrical casing with the viscous fluid at the time of assembling, so that the assembling step is simplified. Further, by selecting the position where the communication hole is provided, further lowering the torque when opening the lid or door can be achieved, so that the opening can be opened with extremely small force, so that it can be easily opened by children and elderly people. There are advantages.

Further , the rotation member is in a predetermined range in the first half region when rotating in the direction for generating high torque, and when rotating in the direction for generating low torque.
In the predetermined range in the second half region, by the communication hole
The pressurized side and the depressurized side in each chamber were communicated .
As a result, for example, when the lid or the like is closed, at the first half area
Relatively rapidly close for in the constant range, is closed faster time to close compared to the damper braking force is generated from the beginning, whereas, slowly closed since the braking force is activated in a predetermined range of the second half region, The lid and the like do not collide with the pedestal and the like. When opening the lid,
As a region , the torque can be further reduced, and the whole can be easily opened with a very small force.

Further, as in claim 2 , the cylindrical casing closes the outer end of one chamber and has an opening at the outer end of the other chamber, and a part is accommodated in one chamber. The first rotating member penetrates through a hole provided in the center of the partition, through a second rotating member partially accommodated in the other chamber, and together with the second rotating member, the casing is moved from the opening to the outside of the casing. To protrude. Therefore, since two dampers can be disposed in one cylindrical casing, for example, two dampers for a toilet seat and a toilet lid can be attached to one place of a toilet. Further, since the first rotating member penetrates into the second rotating member and is rotatable around a concentric axis, the bending strength is improved because the rotating member has a double structure.

Further, as claimed in claim 3, the inner peripheral surface of each chamber is provided protrusions projecting from along the axial direction, respectively, and protrusions each rotary member protruding from the outer circumferential surface, the protrusions with the rotation of the cover is rotated member and to and a rotatable valve body integral with engaged with said projections. Accordingly, the state of engagement between the ridge and the valve body can be changed according to the rotation direction of the rotating member, and the flow rate of the viscous fluid flowing through the valve body and flowing in the room can be changed. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an internal structure of a first configuration example of the present dual-type rotary damper.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an exploded perspective view showing the structure of a rotating member and a valve member in one chamber of the first configuration example.

FIG. 5 is an exploded perspective view showing the structure of a rotating member and a valve member in the other chamber of the first configuration example.

FIG. 6 is a cross-sectional view showing an internal structure of a second configuration example of the present dual-type rotary damper.

[Explanation of symbols]

1. Double rotary damper 2. Cylindrical casing 2.
1,22..room, 23,24..protrusion, 31 .. (first
) Rotating member, 32... (Second) rotating member, 31a,
32a ··· ridge, 41, 42 ··· valve body, 5 ··· viscous fluid, 6 ··· separation, 6a ··· hole, 6b ··· communication hole, 7, 8
..Outer end portion and opening 8a.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-280290 (JP, A) JP-A-8-312694 (JP, A) JP-A-5-296267 (JP, A) JP-A-8-A 303495 (JP, A) JP-A-6-327586 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 9/14 A47K 13/12 E05F 3/14 F16D 57/02

Claims (3)

(57) [Claims] 1. A cylindrical casing having a chamber therein, a rotating member partially accommodated in the chamber, a viscous fluid filled in the chamber, and a high torque or a low torque depending on a rotation direction of the rotating member. And a pair of rotary dampers provided with a fluid torque control means for generating an axial force through a gap.
And communicates between the two chambers of the coupled pair of rotary dampers.
A dual rotary damper having a communication hole provided in the space.
The rotating member rotates in a direction to generate a high torque.
In the first half area and low torque
Each of the chambers in a predetermined range of the latter half area when rotating
A dual rotary damper characterized in that a pressurized side and a depressurized side are communicated with each other . 2. A pre-Symbol tubular casing closes the outer end of one of said chamber, and has an opening in the outer end portion of the other of said chambers, second part chamber of the one is accommodated The first rotating member penetrates a second rotating member partially accommodated in the other chamber from a hole provided at the center of the partition, and the outer casing and the second rotating member pass through the opening to the outside of the casing. The dual rotary damper according to claim 1, wherein the rotary damper protrudes from the rotary damper. Wherein provided protruding portion protruding in the axial direction, respectively, a prior Symbol inner peripheral surface of each chamber, the protrusions projecting from the respective rotary member outer peripheral surface, the rotary member is covered to the ridge <br/> duplex rotary damper according to claim 1 or claim 2, characterized in that it comprises a valve body rotatable integrally with engaging with said projections with the rotation of the.