JP2009092086A - Rotating damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure related to a rotating damper device to damp the closing motion etc. of a key board cover of a piano, a cover of a toilet bowl, etc. <P>SOLUTION: Connecting recessed parts 51, 53 to fit ends of blades 31, 33 to each other free to relatively move back and forth in the rotating direction within a range of a central angle α1 are provided at the end of a first rotation shaft 5. Blade-side interrupting surfaces 31a, 33a and recessed-part side interrupting surfaces 51a, 53a to interrupt communication between the side of a pressure chamber 35 and the side of a non-pressure chamber 37 are provided close to each other by relative movement when rotating to the side of the pressure chamber 35 at ends of the blades 31, 33 of the first rotation shaft 5 and connecting recessed parts 51, 55 of a second rotation shaft 7. Communication passages 55, 57 to make the side of the pressure chamber 35 and the side of the non-pressure chamber 37 communicate with each other when rotating to the side of the non-pressure chamber 37 are formed between the ends of the blades 31, 33 of the first rotation shaft 5 and the connecting recessed parts 51, 53 of the second rotation shaft 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotary damper device for damping a closing operation of a piano keyboard lid, a toilet lid and the like.

  A conventional rotary damper device of this type applies a damping force to a lid, a door or the like when it is opened or closed.

  In this rotary damper device, a rotating shaft is supported in a case in which silicon oil or the like is sealed, and a vane that engages and interlocks with a protrusion of the rotating shaft on the outer peripheral side of the case. The vane and the protrusion are provided with a flow passage that is opened and closed by a valve body.

  When the rotating shaft rotates to the pressure chamber side, the valve body closes the flow path to generate a drag force and performs a damping operation. When the rotating shaft rotates to the non-pressure chamber side, the valve element opens the flow passage, allows the silicon oil to flow from the pressure chamber side to the non-pressure chamber side, and does not generate drag, so that no damping operation occurs. I do.

  Accordingly, the drag generated by the rotation of the rotating shaft can be used to damp the closing operation of the piano keyboard lid, the toilet lid, and the like.

  However, such a conventional structure requires a vane and a valve body in addition to the rotating shaft, has a complicated structure, and has a problem that assembly and parts management are complicated.

JP 2000-199536 A JP 2002-364893 A JP 2003-176845 A Japanese Patent No. 2894596

  The problem to be solved is that the structure is complicated and the assembly and parts management are complicated.

  In order to simplify the structure, the present invention includes a case in which a fluid is enclosed and a radial protrusion is provided inside to form a rotary damper chamber, and a rotary surface is rotatably attached to the rotary damper chamber and the peripheral surface of the protrusion is Rotating between the wing part and the projecting part provided with a wing part which is close or close to the part so as to be relatively rotatable and protrudes in the radial direction and whose outer periphery is close to or close to the inner peripheral surface of the case so as to be relatively rotatable. A state in which the damper chamber can be divided into a pressure chamber side and a non-pressure chamber side before and after the rotation direction, and communication between the pressure chamber side and the non-pressure chamber side is blocked at the end of the first rotation member And a second rotating member that is relatively fitted to the case and closely attached so as to close the end of the case, and is provided at the inner end of the case of the second rotating member. , The end of the blade portion is a predetermined range in the circumferential direction. A connecting recess that is fitted so as to be relatively movable back and forth in the rotational direction at the end of the blade portion of the first rotating member and the connecting recess of the second rotating member by the relative movement when rotating to the pressure chamber side. Provided are a blade-side blocking surface and a recess-side blocking surface that closely block communication between the pressure chamber side and the non-pressure chamber side, and at the time of rotation to the non-pressure chamber side, the pressure chamber side and the non-pressure chamber side The main feature is that the flow passage that communicates with each other is formed between the end portion of the blade portion of the first rotating member and the connecting concave portion of the second rotating member, or formed in communication with either one of them.

  The rotary damper device according to the present invention includes a case in which a fluid is enclosed and a radial protrusion is provided inside to form a rotary damper chamber, and the peripheral surface of the rotary damper device is rotatably attached to the rotary damper chamber. A rotating damper chamber is provided between the blade portion and the protrusion, the blade portion including a blade portion close to or close to the rotation and projecting in the radial direction and having an outer periphery close to or close to the inner peripheral surface of the case so as to be relatively rotatable. A first rotating member that can be divided into a pressure chamber side and a non-pressure chamber side before and after the rotation direction, and relative rotation in a state where communication between the pressure chamber side and the non-pressure chamber side is blocked at an end of the first rotating member A second rotating member that is fitted and arranged so as to be relatively rotatable with respect to the case and that is closely attached so as to close the end of the case, and the vane at the inner end of the case of the second rotating member The end of the part in the circumferential range A connecting recess that is fitted to be movable relative to the front and rear in the rolling direction is provided, and the end of the blade portion of the first rotating member and the connecting recess of the second rotating member are in close contact with the relative movement when rotating to the pressure chamber side. And providing a blade-side blocking surface and a recess-side blocking surface that block communication between the pressure chamber side and the non-pressure chamber side, and between the pressure chamber side and the non-pressure chamber side during rotation to the non-pressure chamber side. Is formed between the end portion of the blade portion of the first rotating member and the connecting concave portion of the second rotating member, or is formed in communication with either one of them.

  For this reason, a vane and a valve body are unnecessary, it can be set as a simple structure, and an assembly | attachment and component management can be made easy.

  The object of simplifying the structure is realized by the first and second rotating members, the connecting recess and the flow passage.

[Structure of rotating damper device]
1 to 7 show a rotary damper device according to Embodiment 1 of the present invention, FIG. 1 is a cross-sectional view, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1 during a damping operation, FIG. 5 is a cross-sectional view at the same position as FIG. 4 during a non-damping operation, and FIG. 6 is an exploded perspective view viewed from one direction. FIG. 7 is an exploded perspective view seen from the other direction.

  As shown in FIGS. 1 to 7, the rotary damper device 1 includes a case 3 and first and second rotating shafts 5 and 7 that are first and second rotating members.

  In the case 3, the case main body 3a is formed in a bottomed cylindrical shape with resin, and a metal pipe 9 is attached to the outer periphery to be reinforced against internal pressure. The metal pipe 9 is attached by insert molding or fitting.

  One end of the case body 3 a is integrally provided with an end wall 11, and the other end is tightly closed with a lid 13. A bearing portion 15 is integrally provided on the end wall 11. A two-surface width portion 15 a is formed on the outer surface of the bearing portion 15. A bearing hole 17 concentric with the axis of the case 3 is formed in the bearing portion 15. The lid body 13 includes a shaft support hole 19, the fitting boss portion 21 is fitted to the inner periphery of the end portion of the case body 3 a, and the flange portion 23 is abutted against the end surface of the case 3 including the metal pipe 9. .

  Inside the case 3, a fluid, for example, silicon oil, is sealed, and radial protrusions 25 and 27 are provided on the inner surface of the case body 3 a so as to be opposed to each other at 180 ° to form a rotary damper chamber 29. The protrusions 25 and 27 are formed in a trapezoidal cross section as shown in FIG. 3, and the tips 25a and 27a are formed in an arc shape by an arc centered on the rotation center. Both side surfaces in the circumferential direction of the protrusions 25 and 27 are formed by surfaces along a radius passing through the axis of the case 3.

  As shown in FIGS. 6 and 7, the first rotating shaft 5 is rotatably attached to the rotary damper chamber 29, and the circumferential surface thereof is in close contact with the tips 25 a and 27 a of the protrusions 25 and 27 so as to be relatively rotatable. It is close. The first rotation shaft 5 is provided with a support shaft portion 5 a at an end portion, and is fitted and supported in the bearing hole 17 of the case 3. A gap 28 (FIG. 1) is formed between the support shaft portion 5 a and the bearing portion 15. A communication groove 5 b is formed in the support shaft portion 5 a along the axial direction, and a rotary damper chamber 29 is communicated with the gap 28 on both sides of the first rotary shaft 5.

  The first rotating shaft 5 includes blade portions 31 and 33 on the outer periphery. The tips of the blade portions 31 and 33 are formed to have substantially the same curvature as the inner peripheral surface of the case 3 and are arranged densely or close to the inner peripheral surface of the case 3 so as to be relatively rotatable. Both side surfaces 31a, 31b, 33a, 33b in the rotational direction of the blade portions 31, 33 are formed along radial surfaces that pass through the center of rotation.

  The rotary damper chamber 29 can be divided into the pressure chamber 35 side and the non-pressure chamber 37 side between the blade portions 31 and 33 and the protrusions 25 and 27 before and after the rotation direction of the first rotation shaft 5. As shown in FIG. 3, the operating angle of the first rotating shaft 5 in the rotary damper chamber 29 is θ1 between the projecting portions 25 and 27, and a margin angle θ2 is formed between the projecting portions 25 and 27. .

  The second rotating shaft 7 is fitted and arranged at the end of the first rotating shaft 5 in a state where communication between the pressure chamber 35 side and the non-pressure chamber 37 side is cut off, and is rotatable with respect to the case 3. The case 3 is closely attached so as to close the end.

  In the second rotating shaft 7, the output shaft portion 39 and the coupling portion 41 are integrally formed, and a seal concave portion 43 is formed between the output shaft portion 39 and the coupling portion 41.

  The output shaft 39 is rotatably supported by the shaft support hole 19 of the lid 13 as shown in FIG. 1, and the O-ring 45 accommodated and supported by the seal recess 43 is slidable in the shaft support hole 19. Close. The output shaft portion 39 is formed with a two-sided width portion 39a.

  The coupling portion 41 has an outer peripheral diameter that is substantially the same as the inner peripheral diameter of the case 3, and is closely fitted to the inner periphery of the case so as to be relatively rotatable. As shown in FIG. 7, the coupling portion 41 is provided with a coupling hole 49 that closely fits to the first rotating shaft 5 so as to be relatively rotatable, as shown in FIGS. 4, 5, and 6. A pair of connecting recesses 51 and 53 are formed to face each other with a 180 ° arrangement.

  The connection recesses 51 and 53 are for fitting the end portions of the blade portions 31 and 33, and are provided with recess-side contact surfaces 51 a, 51 b, 53 a and 53 b, and the back walls 51 c and 53 c It is formed flush with the back wall 49a.

The opposing widths of the recess-side contact surfaces 51a, 51b, 53a, 53b are larger than the widths of the side surfaces 31a, 31b, 33a, 33b of the blade portions 31, 33, and α1 at the rotation center angle as shown in FIG. is open. By opening α1, the blade portions 31 and 33 fitted in the connecting recesses 51 and 53 are allowed to move relative to each other in the circumferential direction within a predetermined range.
[Blade-side blocking surface and recess-side blocking surface, flow passage, orifice]
A blade-side blocking surface and a recess-side blocking surface are formed in the end portions of the blade portions 31 and 33 of the first rotating shaft 5 and the connecting recesses 51 and 53 of the second rotating shaft 7. In the present embodiment, the blade-side blocking surface is constituted by axial end portions of the side surfaces 31a and 33a of the blade portions 31 and 33. The recess-side blocking surface is configured by recess-side contact surfaces 51 a and 53 a of the connecting recesses 51 and 53.

  When the first rotating shaft 5 rotates toward the pressure chamber 35 in conjunction with the second rotating shaft 7, the first and second rotating shafts 5 and 7 move relative to each other at the concave side contact surfaces 51a and 53a. Closely contacts the side surfaces 31a and 33a of the blade portions 31 and 33 to block communication between the pressure chamber 35 side and the non-pressure chamber 37 side.

  Between the end portions of the blade portions 31 and 33 of the first rotating shaft 5 and the connecting recesses 51 and 53 of the second rotating shaft 7, flow passages 55 and 57 are formed. When the first rotating shaft 5 rotates toward the non-pressure chamber 37 in conjunction with the second rotating shaft 7, the flow passages 55 and 57 are located between the pressure chamber 35 side and the non-pressure chamber 37 side during this rotation. Is to communicate.

  The flow passages 55 and 57 are formed by the first rotating shaft by recess-side grooves 59 and 61 formed in the connecting recesses 51 and 53 and blade-side grooves 63 and 65 formed on end surfaces of the blades 31 and 33. 5 between the end portions of the five blade portions 31 and 33 and the connecting recess portions 51 and 53 of the second rotating shaft 7.

  As shown in FIG. 5, the recess-side groove portions 59 and 61 and the blade-side groove portions 63 and 65 have radially inner and outer peripheral surfaces formed with radii R1 and R2 from the center of rotation. Is formed with a central angle α2 centered on the center of rotation with respect to the recess-side contact surfaces 51b and 53b. α2 is set to approximately twice α1, but this relationship can be arbitrarily set.

  Short-circuit grooves 67 and 69 are formed on the peripheral surface of the first rotating shaft 5. The short-circuit grooves 67 and 69 are circumferentially extended on the peripheral surface of the first rotating shaft 5 and are formed so as to gradually become shallower from the blades 31 and 33 side, that is, from the non-pressure chamber 37 side to the pressure chamber 35 side. ing. The short-circuit grooves 67 and 69 form an orifice between the protrusions 25 and 27 and short-circuit the pressure chamber 35 side and the non-pressure chamber 37 side.

This orifice is formed so that the short-circuit groove portions 67 and 69 gradually become shallower from the blade portions 31 and 33 side, so that the cross-sectional area becomes smaller as the first rotating shaft 5 rotates toward the pressure chamber 35 side. The orifice is configured to disappear at the end of the operating range. In addition, it is also possible to leave the orifice on the end side of the operation range by setting the depth of the short-circuit groove portions 67 and 69.
[Assembly]
Silicon oil is sealed in the rotary damper chamber 29 in the case 3.

  The first rotating shaft 5 is inserted into the case 3, and the support shaft portion 5 a is fitted into the bearing hole 17.

  The second rotary shaft 7 is inserted from the end opening of the case 3 main body, the coupling hole 49 is fitted to the end of the first rotary shaft 5, and the connection recesses 51 and 53 are connected to the first rotary shaft 5. The blade portions 31 and 33 are fitted to the end portions.

An O-ring 45 is attached to the seal recess 43 of the second rotating shaft 7, and the lid 13 is attached to the end opening of the case body 3a by press fitting or the like. The lid 13 and the case 3 main body are fixed by adhesion, welding, or the like.
[Damping operation]
In the rotary damper device 1, the bearing portion 15 of the case 3 is coupled to the fixed side while being prevented from rotating by the two-surface width portion 15a, and the output shaft portion 39 of the second rotary shaft 7 is connected to the keyboard cover of the piano and the toilet. It is coupled to a rotating shaft of an opening / closing body such as a lid so as to rotate integrally through a two-surface width portion 39a.

  In FIG. 3, the first rotating shaft 5 is rotationally displaced toward the non-pressure chamber 37 side.

  From this state, when the opening / closing body such as the keyboard cover of the piano and the toilet lid is closed, the second rotating shaft 7 rotates in conjunction with this, and the concave portions of the connecting concave portions 51 and 53 as shown in FIG. The contact surfaces 51a and 53a and the side surfaces 31a and 33a of the blade portions 31 and 33 come into contact with each other so that the first rotating shaft 5 rotates in conjunction with the first rotating shaft 5 and rotates toward the pressure chamber 35.

  At the time of this rotation, as shown in FIG. 4, the recess-side contact surfaces 51a and 53a and the side surfaces 31a and 33a of the blade portions 31 and 33 are in close contact with each other to block communication between the pressure chamber 35 side and the non-pressure chamber 37 side.

  On the other hand, since the short-circuit grooves 67 and 69 form an orifice between the protrusions 25 and 27 and short-circuit the pressure chamber 35 side and the non-pressure chamber 37 side, the amount corresponding to the opening area of the orifice Silicon oil flows from the pressure chamber 35 side to the non-pressure chamber 37 side.

  Therefore, the first rotating shaft 5 receives a damping force corresponding to the opening area of the orifice when rotating to the pressure chamber 35 side, and this damping force is transmitted to the opening / closing body via the second rotating shaft 7 to perform the closing operation. Can be dumped.

  When the opening / closing body such as the keyboard cover of the piano and the lid of the toilet is opened, the second rotating shaft 7 is rotated in conjunction with the opening / closing body, and the recess-side contact surfaces 51a and 53a are the blade portions 31 as shown in FIG. , 33 away from the side surfaces 31a, 33a, the communication block between the pressure chamber 35 side and the non-pressure chamber 37 side between them is released. At the same time, the recess-side contact surfaces 51b and 53b of the connecting recesses 51 and 53 and the side surfaces 31b and 33b of the blade portions 31 and 33 contact each other, and the first rotation shaft 5 rotates in conjunction with this contact. It rotates to the non-pressure chamber 37 side.

  During this rotation, the flow passages 55 and 57 communicate with each other between the end portions of the blade portions 31 and 33 and the connecting recess portions 51 and 53 of the second rotating shaft 7 by the recess side groove portions 59 and 61 and the blade portion side groove portions 63 and 65. It is formed. Since the flow passages 55 and 57 open between the recess-side contact surfaces 51a and 53a and the side surfaces 31a and 33a of the blade portions 31 and 33, which are released from the blocking as described above, the pressure chamber 35 and the non-pressure chamber 37 are provided. The silicone oil in the pressure chamber 35 flows into the non-pressure chamber 37 from the flow passages 55 and 57 as the first rotating shaft 5 rotates.

  Contrary to the above, the cross-sectional area of the orifice formed between the short-circuit grooves 67 and 69 and the protrusions 25 and 27 gradually increases, and the silicon oil in the pressure chamber 35 is not pressurized in this portion. It flows into the chamber 37.

Therefore, the opening / closing body can be opened lightly without receiving a damping action.
[Effect of Example 1]
The rotary damper device 1 of the present invention is rotatably attached to the rotary damper chamber 29 and a case 3 in which silicon oil is enclosed and which includes radial protrusions 25 and 27 to form a rotary damper chamber 29. Thus, the blades 31 and 33 whose peripheral surfaces are close to or close to the projecting portions 25 and 27 so as to be relatively rotatable and project in the radial direction and whose outer periphery is closely or closely adjacent to the inner peripheral surface of the case 3 along the axial direction. A first rotary shaft 5 capable of partitioning the rotary damper chamber 29 between the blade portions 31 and 33 and the projections 25 and 27 into the pressure chamber 35 side and the non-pressure chamber 37 side in the front and rear direction of rotation, and the first The end portion of the rotating shaft 5 is fitted and arranged so as to be relatively rotatable in a state where communication between the pressure chamber 35 side and the non-pressure chamber 37 side is interrupted, and is relatively rotatable with respect to the case 3 and the end portion of the case 3 Take close to close And the second rotary shaft 7 is disposed at the inner end of the case 3 of the second rotary shaft 7 so that the end portions of the blade portions 31 and 33 can be relatively moved back and forth in the rotational direction within the range of the central angle α1. Connection concave portions 51 and 53 to be fitted are provided, and the end portions of the blade portions 31 and 33 of the first rotary shaft 5 and the connection concave portions 51 and 55 of the second rotary shaft 7 are rotated when the pressure chamber 35 is rotated. Provided are blade-side blocking surfaces 31a, 33a and recess-side blocking surfaces 51a, 53a that are in close contact with each other by relative movement to block communication between the pressure chamber 35 side and the non-pressure chamber 37 side, and toward the non-pressure chamber 37 side. The flow passages 55 and 57 for communicating between the pressure chamber 35 side and the non-pressure chamber 37 side at the time of rotation are provided at the end portions of the blade portions 31 and 33 of the first rotating shaft 5 and the connecting recess portion 51 of the second rotating shaft 7. 53 formed between each other.

  For this reason, the vane and the valve body, which have been conventionally required, can be made simple and the structure can be simplified, and assembly and parts management can be facilitated.

  The flow passages 55 and 57 are formed by the first rotating shaft by recess-side grooves 59 and 61 formed in the connecting recesses 51 and 53 and blade-side grooves 63 and 65 formed on end surfaces of the blades 31 and 33. 5 between the end portions of the five blade portions 31 and 33 and the connecting concave portions 51 and 53 of the second rotating shaft 7.

  Therefore, the flow passages 55 and 57 can be formed only by forming the recesses, and the manufacturing can be easily performed.

  Short-circuit groove portions 67 and 69 are formed in the circumferential direction to form an orifice between the projecting portions 25 and 27 on the peripheral surface of the first rotating shaft 5 and short-circuit the pressure chamber 35 side and the non-pressure chamber 37 side. The short-circuit groove portions 67 and 69 are formed so as to gradually reduce the cross-sectional area from the non-pressure chamber 37 side to the pressure chamber 35 side.

  Therefore, the orifice can be easily formed, and an accurate damping operation can be performed.

  The case 3 was made of resin, and a metal pipe 9 was attached to reinforce the internal pressure.

  Accordingly, the case 3 can be made of resin and can be reduced in weight, and has pressure resistance. In addition, in the case of a toilet lid or the like, it can withstand cleaning using chemicals.

  8 to 10 relate to a second embodiment of the present invention. FIG. 8 corresponds to FIG. 6 and is an exploded perspective view of the rotary damper device viewed from one direction. FIG. 9 corresponds to FIG. FIG. 10 is an exploded perspective view seen from the other direction, and FIG. 10 is a cross-sectional view of the second rotary shaft of the rotary damper device on the end face side of the coupling portion.

  The basic configuration is the same as that of the first embodiment, and the same or corresponding components will be described with the same reference numerals or the same reference numerals marked with A.

  In the rotary damper device 1A of the present embodiment, the structure of the orifice is changed.

  In the rotary damper device 1A of this embodiment, the short-circuit groove portions 67A and 69A are formed along the circumferential direction on the end surface of the second rotation shaft 7A without forming the short-circuit groove portion on the first rotation shaft 5A. The short-circuit grooves 67A and 69A form an orifice with the end surfaces 25a and 27a of the protrusions 25 and 27 to short-circuit between the pressure chamber 35 side and the non-pressure chamber 37 side.

  The short-circuit grooves 67A and 69A are formed so as to gradually reduce the cross-sectional area from the non-pressure chamber 37 side to the pressure chamber 35 side.

  Since the short-circuit groove portions 67A and 69A are formed so that the short-circuit groove portions 67A and 69A gradually become shallower from the non-pressure chamber 37 side to the pressure chamber 35 side, the first rotating shaft 5A moves to the pressure chamber 35 side. The cross-sectional area becomes smaller as it rotates, and the orifice disappears on the end side of the operating range. It should be noted that an orifice may be left on the end side of the operation range by setting the depth of the short-circuit groove portions 67A and 69A.

  Therefore, also in the present embodiment, the orifice formed by the short-circuit groove portions 67A and 69A can perform the same function as the orifice formed by the short-circuit groove portions 67 and 69 of the first embodiment, and similar operational effects can be achieved.

  11 and 12 relate to a third embodiment of the present invention, FIG. 11 is a sectional view of the rotary damper device, and FIG. 12 is a side view thereof.

  The basic configuration is the same as that of the first embodiment, and the same or corresponding components will be described with the same reference numerals or B added to the same reference numerals.

  In the rotary damper device 1B of the third embodiment, the metal pipe 9B is fitted into the main body of the case 3B, and both end portions 9Ba and 9Bb of the metal pipe 9B are swaged and fixed.

Therefore, also in this embodiment, the function of the metal pipe 9B similar to that in Embodiment 1 can be achieved. Further, the metal pipe 9B can be easily fixed by caulking.
[Others]
The flow passages 55 and 57 may be configured such that the flow is blocked when the recess-side blocking surfaces 51a and 53a and the blade-side blocking surfaces 31a and 33a come into contact with each other, and the flow is possible when they are separated. 41 or the blade portions 31 and 33 are formed with communication holes communicating with the pressure chamber 35 side, and the openings of the communication holes are formed in the recess-side blocking surfaces 51a and 53a or the side surfaces 31a and 33a of the blade portions 31 and 33. The opening may be opened and closed by the blade-side blocking surfaces 31a and 33a or the recessed-side blocking surfaces 51a and 53a.

It is sectional drawing of a rotation damper apparatus. Example 1 It is a side view of a rotary damper device. Example 1 FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. Example 1 FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1 during a damping operation. Example 1 It is sectional drawing in the same position as FIG. 4 at the time of non-damping operation | movement. Example 1 It is the disassembled perspective view seen from one direction of the rotation damper apparatus. Example 1 It is the disassembled perspective view seen from one direction of the rotation damper apparatus. Example 1 It is the disassembled perspective view which looked at the rotation damper apparatus from one direction. (Example 2) It is the disassembled perspective view seen from one direction of the rotation damper apparatus. (Example 2) It is sectional drawing in the connection part end surface side of the 2nd rotating shaft of a rotation damper apparatus. (Example 2) It is sectional drawing of a rotation damper apparatus. (Example 3) It is a side view of a rotary damper device. (Example 3)

Explanation of symbols

1,1A, 1B Rotary damper device 3,3B Case
5,5A First rotating shaft (first rotating member)
7, 7A Second rotating shaft (second rotating member)
9, 9B Metal pipes 25, 27 Protrusions 25b, 27b End surfaces of the protuberances 29 Rotating damper chambers 31, 33 Blade portions 31a, 33a Blade portion side blocking surfaces (side surfaces of the blade portions)
35 Pressure chamber 37 Non-pressure chamber 51, 53 Connection recess 51a, 53a Recess side blocking surface (recess side contact surface)
55, 57 Flow passage 59, 61 Recess side groove 63, 65 Blade side groove 67, 67a, 69, 69a Short-circuit groove

Claims (5)

A case in which a fluid is enclosed and a radial damper is formed inside to form a rotary damper chamber;
It is rotatably attached to the rotary damper chamber, and its peripheral surface is in close proximity to or close to the protrusion and protrudes in the radial direction, and its outer periphery along the axial direction is in close contact with or close to the case inner peripheral surface. A first rotating member that includes a blade portion that separates the rotary damper chamber into the pressure chamber side and the non-pressure chamber side before and after the rotation direction between the blade portion and the protrusion,
The end portion of the first rotating member is fitted and disposed so as to be relatively rotatable in a state where communication between the pressure chamber side and the non-pressure chamber side is blocked, and is relatively rotatable to the case and closes the end portion of the case. A second rotating member closely attached to the
A connection recess for fitting the end portion of the blade portion so as to be relatively movable back and forth in the rotational direction within a predetermined range in the circumferential direction is provided at the inner end portion of the case of the second rotating member,
The communication between the pressure chamber side and the non-pressure chamber side is cut off by close contact with the end of the blade portion of the first rotating member and the connecting recess of the second rotating member by the relative movement when rotating to the pressure chamber side. A flow passage for providing communication between the pressure chamber side and the non-pressure chamber side during rotation to the non-pressure chamber side is provided at the end of the blade portion of the first rotating member. Formed between the connecting recesses of the second rotating member and the second rotating member, or formed in communication with either one,
A rotary damper device characterized by that. The rotary damper device according to claim 1,
The flow path includes a recess-side groove formed in the connection recess and a blade-side groove formed on an end surface of the blade, so that the end of the blade of the first rotation member and the connection recess of the second rotation member Formed between each other,
A rotary damper device characterized by that. The rotary damper device according to claim 1 or 2,
On the circumferential surface of the first rotating member, a short-circuit groove is formed in the circumferential direction to form an orifice between the protrusion and short-circuit between the pressure chamber side and the non-pressure chamber side,
The short-circuit groove is formed so as to gradually reduce the cross-sectional area from the non-pressure chamber side to the pressure chamber side,
A rotary damper device characterized by that. The rotary damper device according to claim 1 or 2,
Forming a short-circuit groove in the circumferential direction to form a short circuit between the pressure chamber side and the non-pressure chamber side by forming an orifice between the end surface of the second rotating member and the end surface of the protrusion;
The short-circuit groove is formed so as to gradually reduce the cross-sectional area from the non-pressure chamber side to the pressure chamber side,
A rotary damper device characterized by that. The rotary damper device according to any one of claims 1 to 4,
The case was made of resin and a metal pipe was attached to reinforce against internal pressure.
A rotary damper device characterized by that.

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