Rotary Damper

Abstract

To provide a rotary damper which can simplify a constitution of a valve body, and can alleviate a burden of assembly work including maintenance.SOLUTION: In a rotary damper 100, the inside of a housing main body 102 is partitioned into individual chambers R1 to R4 by fixed vanes 104, 105 and movable vanes 122, 123 of a rotor 120. Inter-bulkhead regions 108, 112 are formed at end parts of the fixed vanes 104, 105 by first valve bulkheads 106, 110, and second valve bulkheads 107, 111 and valve bodies 113, 114 are accommodated in the inter-bulkhead regions 108, 112. Flow passage block parts 113a, 114a and fourth valve flow passages 113b, 114b for completely blocking first valve flow passages 106a, 110a which are formed at the inter-bulkhead regions 108, 112, and partially blocking second valve flow passages 107a, 111a are formed at the valve bodies 113, 114.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rotary damper used as a kinetic energy damping device in a rotation mechanism of a four-wheeled self-propelled vehicle. [Background technology]

[0002] Conventionally, for example, in a four-wheeled self-propelled vehicle, a rotary damper has been used as a device for damping kinetic energy in a rotation mechanism. For example, the following Patent Document 1 discloses a rotary damper in which a valve body (hereinafter referred to as a "valve body") for generating a damping force is provided at the tip of two vanes (hereinafter referred to as "movable vanes") formed on a shaft (hereinafter referred to as a "rotor") that rotates in a cylindrical housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. WO2012 / 141242 Summary of the Invention

[0004] However, in the rotary damper disclosed in Patent Document 1, the valve body is slidably fitted into the inner peripheral surface of the housing and functions as part of the movable vane, so it needs to be made of the materials and shapes required for the valve body and movable vane, which limits the configuration of the valve body.In addition, the rotary damper disclosed in Patent Document 1 has the problem that assembly work is difficult to perform because the rotor is fitted into the housing with the valve body pressed against the tip of the movable vane.

[0005] The present invention has been made to address the above-mentioned problems, and an object of the present invention is to provide a rotary damper which can simplify the structure of the valve body and reduce the burden of assembly work, including maintenance.

[0006] In order to achieve the above object, the present invention is characterized by comprising a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid and having fixed vanes formed in the inner chamber as walls along the radial direction to prevent the fluid from flowing in the circumferential direction, a rotor having movable vanes on the outer periphery of a shaft which divides the inner chamber and rotates while pushing the fluid towards the fixed vanes, and a cover provided on the housing for liquid-tightly closing the inner chamber, and a cover formed in the inner chamber by the fixed vanes and movable vanes and the movable vanes. By rotation In a rotary damper formed with a plurality of individual chambers whose volumes increase or decrease, the fixed vane has a rotor sliding portion whose tip extending from the housing slides against the outer circumferential surface of the shaft, a first valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft, a first valve flow passage through which a fluid flows, with a portion of the first valve partition being cut out and communicating with one of the plurality of individual chambers, a second valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft at a position spaced apart in the circumferential direction of the inner chamber from the first valve partition, and a second valve flow passage through which a fluid flows, with a portion of the second valve partition being cut out and communicating with a chamber other than the chamber that communicates with the first valve flow passage, Area between the same partition walls a valve body is provided in a state in which its length is shorter than the radial length of the shaft body in the partition wall and its circumferential displacement is permitted within the partition wall region, and at least one of the housing, the rotor and the valve body is provided with a valve position restricting body that positions the valve body on one of the inner circumferential surface side of the housing and the outer circumferential surface side of the shaft body to form a third valve flow path on the other side, and the valve body is provided with a flow path closing portion that can close one of the first valve flow path and the second valve flow path, and a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path. a valve body is provided for each of the different inter-partition wall regions; and the valve position restriction body positions the valve body on the outer circumferential surface side of the shaft body to form a third valve flow path on the inner circumferential surface side of the housing, and integrally connects the valve bodies in the different inter-partition wall regions to each other. The reason is that...

[0007] According to the features of the present invention configured in this manner, the rotary damper has an inter-partition area formed in the fixed vane against which the outer peripheral surface of the rotor shaft slides, and a valve body is provided within this inter-partition area, so that the valve body does not slide against the rotor as part of the fixed vane, thereby simplifying the configuration of the valve body and reducing the burden of assembly work, including maintenance. According to the features of the present invention thus configured, In the rotary damper, the valve position restricting member positions the valve body on the outer peripheral surface side of the shaft body and forms the third valve flow path on the inner peripheral surface side of the housing, so that the valve position restricting member is located in the partition region. To This makes it easier to ensure the third valve flow path, which is a flow path for the fluid in the valve. According to another feature of the present invention thus configured, In the rotary damper, the valve position regulating body integrally connects the valve bodies for the different inter-partition regions to each other, so that the burden of assembly work including maintenance related to the valve bodies can be reduced.

[0008] In order to achieve the above object, the present invention is characterized by comprising a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid and having fixed vanes formed in the inner chamber as walls along the radial direction to prevent the fluid from flowing in the circumferential direction, a rotor having movable vanes on the outer periphery of a shaft which divides the inner chamber and rotates while pushing the fluid towards the fixed vanes, and a cover provided on the housing for liquid-tightly closing the inner chamber, and a cover formed in the inner chamber by the fixed vanes and movable vanes and the movable vanes. By rotationIn a rotary damper formed with a plurality of individual chambers whose volumes increase or decrease, the fixed vane has a rotor sliding portion whose tip extending from the housing slides against the outer circumferential surface of the shaft, a first valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft, a first valve flow passage through which a fluid flows, with a portion of the first valve partition being cut out and communicating with one of the plurality of individual chambers, a second valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft at a position spaced apart in the circumferential direction of the inner chamber from the first valve partition, and a second valve flow passage through which a fluid flows, with a portion of the second valve partition being cut out and communicating with a chamber other than the chamber that communicates with the first valve flow passage, Area between the same partition walls a valve body is provided in a state in which its length is shorter than the radial length of the shaft body in the partition wall and its circumferential displacement is permitted within the partition wall region, and at least one of the housing, the rotor and the valve body is provided with a valve position restricting body that positions the valve body on one of the inner circumferential surface side of the housing and the outer circumferential surface side of the shaft body to form a third valve flow path on the other side, and the valve body is provided with a flow path closing portion that can close one of the first valve flow path and the second valve flow path, and a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path. a plurality of inter-partition regions are provided, and a valve body is provided for each of the different inter-partition regions; at least one of the rotor and the cover body has a communication flow passage formed in a groove shape extending between the valve bodies of the different inter-partition regions; and at least two valve bodies to which the communication flow passage extends have a fourth valve flow passage that is connected to the communication flow passage. The reason is that

[0009] According to the features of the present invention configured in this manner, the rotary damper has an inter-partition area formed in the fixed vane against which the outer peripheral surface of the rotor shaft slides, and a valve body is provided within this inter-partition area, so that the valve body does not slide against the rotor as part of the fixed vane, thereby simplifying the configuration of the valve body and reducing the burden of assembly work, including maintenance. According to the features of the present invention thus configured,The rotary damper has a communication flow passage formed in at least one of the rotor and the cover body extending between at least two different valve bodies, and the fourth valve flow passages in the at least two valve bodies are each connected to this communication flow passage.As a result, it is possible to suppress the occurrence of a pressure difference between the individual chambers connected by this communication flow passage, and a stable damping force can be generated with high precision.

[0010] In order to achieve the above object, the present invention is characterized by comprising a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid and having fixed vanes formed in the inner chamber as walls along the radial direction to prevent the fluid from flowing in the circumferential direction, a rotor having movable vanes on the outer periphery of a shaft which divides the inner chamber and rotates while pushing the fluid towards the fixed vanes, and a cover provided on the housing for liquid-tightly closing the inner chamber, and a cover formed in the inner chamber by the fixed vanes and movable vanes and the movable vanes. By rotation In a rotary damper formed with a plurality of individual chambers whose volumes increase or decrease, the movable vane has a housing sliding part whose tip part extending from the shaft slides against the inner circumferential surface of the housing, a first valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft, a first valve flow passage through which a fluid flows, with a part of the first valve partition being cut out and communicating with one of the plurality of individual chambers, a second valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft at a position spaced apart in the circumferential direction of the inner chamber from the first valve partition, and a second valve flow passage through which a fluid flows, with a part of the second valve partition being cut out and communicating with a chamber other than the chamber that communicates with the first valve flow passage, of the plurality of individual chambers, Area between the same partition wallsa valve body is provided in a state in which its length is shorter than the radial length of the shaft body in the partition wall and its circumferential displacement is permitted within the partition wall region, and at least one of the housing, the rotor and the valve body is provided with a valve position restricting body that positions the valve body on one of the inner circumferential surface side of the housing and the outer circumferential surface side of the shaft body to form a third valve flow path on the other side, and the valve body is provided with a flow path closing portion that can close one of the first valve flow path and the second valve flow path, and a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path. a valve body is provided for each of the different inter-partition wall regions; and the valve position restriction body positions the valve body on the outer circumferential surface side of the shaft body to form a third valve flow path on the inner circumferential surface side of the housing, and integrally connects the valve bodies in the different inter-partition wall regions to each other. The reason is that...

[0011] According to the features of the present invention configured in this manner, the rotary damper has an inter-partition area formed in the movable vane that slides on the inner surface of the housing, and a valve body is provided within this inter-partition area, so that the valve body does not slide relative to the housing as part of the movable vane, thereby simplifying the configuration of the valve body and reducing the burden of assembly work, including maintenance. According to the features of the present invention thus configured, In the rotary damper, the valve position restricting member positions the valve body on the outer peripheral surface side of the shaft body and forms the third valve flow path on the inner peripheral surface side of the housing, so that the valve position restricting member is located in the partition region. To This makes it easier to ensure the third valve flow path, which is a flow path for the fluid in the valve. According to another feature of the present invention thus configured, In the rotary damper, the valve position regulating body integrally connects the valve bodies for the different inter-partition regions to each other, so that the burden of assembly work including maintenance related to the valve bodies can be reduced.

[0012] In order to achieve the above object, the present invention is characterized by comprising a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid and having fixed vanes formed in the inner chamber as walls along the radial direction to prevent the fluid from flowing in the circumferential direction, a rotor having movable vanes on the outer periphery of a shaft which divides the inner chamber and rotates while pushing the fluid towards the fixed vanes, and a cover provided on the housing for liquid-tightly closing the inner chamber, and a cover formed in the inner chamber by the fixed vanes and movable vanes and the movable vanes. By rotation In a rotary damper formed with a plurality of individual chambers whose volumes increase or decrease, the movable vane has a housing sliding part whose tip part extending from the shaft slides against the inner circumferential surface of the housing, a first valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft, a first valve flow passage through which a fluid flows, with a part of the first valve partition being cut out and communicating with one of the plurality of individual chambers, a second valve partition formed in a wall shape along the radial direction of the shaft between the inner circumferential surface of the housing and the outer circumferential surface of the shaft at a position spaced apart in the circumferential direction of the inner chamber from the first valve partition, and a second valve flow passage through which a fluid flows, with a part of the second valve partition being cut out and communicating with a chamber other than the chamber that communicates with the first valve flow passage, of the plurality of individual chambers, Area between the same partition walls a valve body is provided in a state in which its length is shorter than the radial length of the shaft body in the partition wall and its circumferential displacement is permitted within the partition wall region, and at least one of the housing, the rotor and the valve body is provided with a valve position restricting body that positions the valve body on one of the inner circumferential surface side of the housing and the outer circumferential surface side of the shaft body to form a third valve flow path on the other side, and the valve body is provided with a flow path closing portion that can close one of the first valve flow path and the second valve flow path, and a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path. a plurality of inter-partition regions are provided, and a valve body is provided for each of the different inter-partition regions; at least one of the rotor and the cover body has a communication flow passage formed in a groove shape extending between the valve bodies of the different inter-partition regions; and at least two valve bodies to which the communication flow passage extends have a fourth valve flow passage that is connected to the communication flow passage. The reason is that

[0013] According to the features of the present invention configured in this manner, the rotary damper has an inter-partition area formed in the movable vane that slides on the inner surface of the housing, and a valve body is provided within this inter-partition area, so that the valve body does not slide relative to the housing as part of the movable vane, thereby simplifying the configuration of the valve body and reducing the burden of assembly work, including maintenance. According to the features of the present invention thus configured, The rotary damper has a communication flow passage formed in at least one of the rotor and the cover body extending between at least two different valve bodies, and the fourth valve flow passages in the at least two valve bodies are each connected to this communication flow passage.As a result, it is possible to suppress the occurrence of a pressure difference between the individual chambers connected by this communication flow passage, and a stable damping force can be generated with high precision.

[0014] Another feature of the present invention is that, in the rotary damper, a plurality of inter-partition regions are provided, a valve body is provided for each of the different inter-partition regions, at least one of the rotor and the cover body has a communication flow passage formed in a groove shape extending between the valve bodies in each of the different inter-partition regions, and at least two of the valve bodies to which the communication flow passage extends have fourth valve flow passages each communicating with the communication flow passage.

[0015] According to another feature of the present invention configured in this manner, the rotary damper has a communication passage formed in at least one of the rotor and the cover body extending between at least two different valve bodies, and the fourth valve passages in the at least two valve bodies are each connected to this communication passage, so that it is possible to suppress the occurrence of a pressure difference between the individual chambers connected by this communication passage, and a stable damping force can be generated with high precision. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view illustrating a schematic overall configuration of a rotary damper according to the present invention. [Diagram 2] FIG. 2 is a parts exploded view showing parts constituting the rotary damper shown in FIG. [Diagram 3]2 is a perspective view showing an internal structure of the rotary damper shown in FIG. 1 with the cover body not shown. [Figure 4] FIG. 4 is a front view of the rotary damper shown in FIG. [Diagram 5] 5 is a cross-sectional view showing the rotary damper including the cover, taken along line 5-5 shown in FIG. 4. [Figure 6] 6 is a partial enlarged view showing the configuration within a dashed circle 6 shown in FIG. 5. [Figure 7] 7 is a cross-sectional view showing the rotary damper including the cover, taken along line 7-7 shown in FIG. 4. [Figure 8] 3 is a perspective view showing the external configuration of two valve bodies and a valve position regulating body that configure the rotary damper shown in FIG. 2. [Figure 9] 5 is a partial enlarged view showing a state in which a valve body in the rotary damper shown in FIG. 4 causes a fluid to flow in an area between partition walls. FIG. [Figure 10] 5 is a partial enlarged view showing a state in which a valve body in the rotary damper shown in FIG. 4 blocks an area between partition walls to prevent the flow of fluid. FIG. [Figure 11] 13 is a partial enlarged view showing a state in which a valve body in a rotary damper according to a modified example of the present invention blocks an area between partition walls to prevent the flow of fluid. FIG. [Figure 12] FIG. 11 is a perspective view showing the external configuration of two valve bodies and a valve position regulating body that configure a rotary damper according to another modified example of the present invention. [Figure 13] FIG. 11 is a partial enlarged view showing a state in which a valve body in a rotary damper according to another modified example of the present invention allows a fluid to flow within an inter-partition region. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of a rotary damper according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic overall configuration of a rotary damper 100. FIG. 2 is a parts development view showing parts constituting the rotary damper 100 shown in FIG. 1. FIG. 3 is a perspective view showing an internal structure of the rotary damper 100 shown in FIG. 1, omitting the illustration of the cover body 124. FIG. 4 is a front view of the rotary damper 100 shown in FIG. 3. FIG. 5 is a cross-sectional view showing the rotary damper 100 including the cover body 124 as viewed from the line 5-5 shown in FIG. 4. FIG. 6 is a partially enlarged view showing the configuration within the broken line circle 6 shown in FIG. 5. FIG. 7 is a cross-sectional view showing the rotary damper 100 including the cover body 124 as viewed from the line 7-7 shown in FIG. 4.

[0018] In addition, in each drawing referred to in this specification, some components are exaggerated and shown in a schematic manner to facilitate understanding of the present invention. Therefore, the dimensions and ratios between the components may differ. This rotary damper 100 is a damping device that is attached to one part of a mechanism in which two parts tilt relatively, such as a reclining seat, armrest, ottoman, glove box, tailgate, or back door of a four-wheeled self-propelled vehicle (such as an automobile or cart), and dampens kinetic energy when the other part tilts.

[0019] (Configuration of rotary damper 100) The rotary damper 100 includes a housing 101. The housing 101 is a component that constitutes the housing of the rotary damper 100 while rotatably holding the rotor 120, and is made of aluminum, iron, zinc, or various resin materials such as polyamide resin. Specifically, the housing 101 is mainly made up of a housing main body 102 and a lid 124.

[0020] The housing body 102 is a component that accommodates the movable vanes 122, 123 and the fluid 130 of the rotor 120 described below, and rotatably supports one end of the shaft 121 of the rotor 120, and is formed in a bottomed cylindrical shape with one end of the cylindrical body opening wide and the other end opening small. More specifically, the housing body 102 has a cylindrical inner chamber 103 formed on the side of the opening 102a that opens wide at one end of the cylindrical body, and a rotor support part 118 is formed in a state where it opens at the bottom of the inner chamber 103.

[0021] The inner chamber 103 is a space that liquid-tightly accommodates the fluid 130 together with the movable vanes 122, 123 of the rotor 120, and is composed of two semi-cylindrical spaces that face each other via the rotor 120 disposed in the center of the housing body 102. Within these inner chambers 103, fixed vanes 104, 105 are each formed integrally with the housing body 102.

[0022] As shown in Fig. 4, the fixed vanes 104, 105 are wall-like parts that divide the inner chamber 103 together with the rotor 120 to form the individual chambers R1 to R4, and are formed to protrude inward from the inner chamber circumferential surface 103a in a convex shape along the axial direction of the housing body 102. In this case, the two fixed vanes 104, 105 are provided at positions facing each other in the circumferential direction on the inner chamber circumferential surface 103a. Each of these fixed vanes 104, 105 has rotor sliding parts 104a, 105a formed on the end surface on the rotor 120 side, and first valve partitions 106, 110 and second valve partitions 107, 111 formed on the end surface on the cover body 124 side, which will be described later.

[0023] The rotor sliding parts 104a, 105a are parts where the fixed vanes 104, 105 slide on the outer circumferential surface of the shaft body 121 of the rotor 120, and are formed extending opposite to the outer circumferential surface of the shaft body 121 along the axial direction of the shaft body 121. In this case, the rotor sliding parts 104a, 105a are formed on a concave arc surface along the convex arc surface of the shaft body 121.

[0024] The first valve partition 106 and the second valve partition 107 are parts for constituting a one-way valve that allows the fluid 130 to flow only from the private chamber R4 to the private chamber R1 between the private chamber R1 and the private chamber R4 adjacent to each other via the fixed vane 104, and are each formed in a wall shape standing up from the end face in the longitudinal direction of the fixed vane 104. More specifically, the first valve partition 106 and the second valve partition 107 are formed extending in the radial direction of the shaft body 121 from the inner peripheral surface of the housing body 102 to the shaft body 121 side of the rotor 120. In this case, the first valve partition 106 is formed on the private chamber R4 side at the end face of the fixed vane 104, and the second valve partition 107 is formed on the private chamber R1 side at the end face of the fixed vane 104.

[0025] As a result, a concave inter-partition area 108 is formed between the first valve partition 106 and the second valve partition 107 on the longitudinal end face of the fixed vane 104. The inter-partition area 108 is a portion for accommodating the valve body 113 described later and regulating the flow of the fluid 130.

[0026] The first valve partition 106 and the second valve partition 107 are formed to a length not reaching the outer circumferential surface of the shaft 121 of the rotor 120, and form a first valve flow path 106a and a second valve flow path 107a, respectively, between them and a valve position regulating body 115 provided on the outer circumferential part of the shaft 121. The first valve flow path 106a is a flow path for allowing the fluid 130 to flow between the private chamber R4 and the inter-partition region 108. The second valve flow path 107a is a flow path for allowing the fluid 130 to flow between the private chamber R1 and the inter-partition region 108.

[0027] The first valve partition 110 and the second valve partition 111, like the first valve partition 106 and the second valve partition 107, are parts for constituting a one-way valve that allows the fluid 130 to flow only from the private chamber R2 to the private chamber R3 between the private chamber R2 and the private chamber R3 adjacent to each other via the fixed vane 105, and are formed in a wall shape standing up from the end face in the longitudinal direction of the fixed vane 105. More specifically, the first valve partition 110 and the second valve partition 111 are formed extending from the inner circumferential surface of the housing main body 102 to the shaft body 121 side of the rotor 120. In this case, the first valve partition 110 is formed on the private chamber R2 side at the end face of the fixed vane 105, and the second valve partition 111 is formed on the private chamber R3 side at the end face of the fixed vane 105.

[0028] As a result, an inter-partition area 112 is formed between the first valve partition 110 and the second valve partition 111 on the longitudinal end face of the fixed vane 105. The inter-partition area 112 is a portion for accommodating the valve body 114 and regulating the flow of the fluid 130, and is formed extending in the radial direction of the shaft body 121.

[0029] The first valve partition 110 and the second valve partition 111 are formed to a length not reaching the outer circumferential surface of the shaft 121 of the rotor 120, and form a first valve flow path 110a and a second valve flow path 111a, respectively, between them and a valve position regulating body 115 provided on the outer circumferential part of the shaft 121. The first valve flow path 110a is a flow path for allowing the fluid 130 to flow between the private chamber R2 and the inter-partition region 112. The second valve flow path 111a is a flow path for allowing the fluid 130 to flow between the private chamber R3 and the inter-partition region 112.

[0030] The valve body 113 is a component for constituting a one-way valve that allows fluid 130 to flow only from chamber R4 to chamber R1 between adjacent chambers R1 and R4 via the fixed vane 104, and is formed into a small piece of resin material such as polyamide resin or metal material such as aluminum. More specifically, the valve body 113 is formed into a piece having a plane parallel to the first valve partition 106 and the second valve partition 107, a plane parallel to the inner circumferential surface of the housing main body 102 in the inter-partition region 108, and a plane parallel to the outer circumferential surface of the shaft body 121.

[0031] In this case, the valve body 113 is formed in a piece shape with a width narrower than the circumferential width of the inter-partition region 108 and a length shorter than the radial length of the inter-partition region 108. Here, the radial length of the inter-partition region 108 is the length including the openings of the first valve flow path 106a and the second valve flow path 107a. The thickness of the valve body 113 is formed to be the same as the height of the first valve partition 106 and the second valve partition 107. The valve body 113 is formed with a flow path blocking portion 113a and a fourth valve flow path 113b.

[0032] The flow path closing portion 113a is a portion for closing the first valve flow path 106a, and is formed as a wall extending along the radial direction of the shaft body 121 at positions facing the first valve flow path 106a and the first valve partition 106. The fourth valve flow path 113b is a portion for circulating the fluid 130 between the second valve flow path 107a, a third valve flow path 116 described below, and a communication flow path 125 described below, and is formed as a wall extending along the radial direction of the shaft body 121 at positions facing the second valve flow path 107a and the second valve partition 107. In this case, the fourth valve flow path 113b is formed by being cut out in a concave shape thinner than the flow path closing portion 113a.

[0033] The valve body 114, like the valve body 113, is a component for constituting a one-way valve that allows fluid 130 to flow only from chamber R2 to chamber R3 between adjacent chambers R2 and R3 via the fixed vane 105, and is formed by forming a resin material such as polyamide resin or a metal material such as aluminum into a small piece. More specifically, the valve body 114 is formed into a piece having a plane parallel to each of the first valve partition wall 110 and the second valve partition wall 111, a plane parallel to the inner circumferential surface of the housing main body 102 in the inter-partition region 112, and a plane parallel to the outer circumferential surface of the shaft body 121.

[0034] In this case, the valve body 114 is formed in a piece shape with a width narrower than the circumferential width of the inter-partition region 112 and a length shorter than the radial length of the inter-partition region 112. Here, the radial length of the inter-partition region 112 is the length including the openings of the first valve flow path 110a and the second valve flow path 111a. The thickness of the valve body 114 is formed to be the same as the height of the first valve partition 110 and the second valve partition 111. The valve body 114 is formed with a flow path blocking portion 114a and a fourth valve flow path 114b.

[0035] The flow path closing portion 114a is a portion for blocking the first valve flow path 110a, and is formed as a wall extending along the radial direction of the shaft body 121 at a position facing the first valve flow path 110a. The fourth valve flow path 114b is a portion for circulating the fluid 130 between the second valve flow path 111a, the third valve flow path 117, and the communication flow path 125, and is formed as a wall extending along the radial direction of the shaft body 121 at positions facing the second valve flow path 111a and the second valve partition wall 111. In this case, the fourth valve flow path 114b is formed by being cut out in a concave shape thinner than the flow path closing portion 114a.

[0036] The valve body 113 and the valve body 114 are connected to each other by a valve position regulating body 115. As shown in Fig. 8, the valve position regulating body 115 is a component that positions the valve body 113 and the valve body 114 on the shaft body 121 side by integrally connecting the valve body 113 and the valve body 114 and fitting it to the outer circumferential surface of the shaft body 121, and is formed in a ring shape from the same material as the valve body 113 and the valve body 114. In other words, the valve position regulating body 115 is formed in an annular shape that fits to the outer circumferential surface of the shaft body 121 of the rotor 120.

[0037] As a result, third valve flow paths 116, 117 are formed in the inter-partition regions 108, 112 in the regions between the inner circumferential surface of the housing body 102 and the valve body 113 and valve body 114, respectively. In addition, the valve position restricting body 115 is a component that blocks the communication flow path 125, and is formed with a width sufficient to block the communication flow path 125. This valve position restricting body 115 is molded integrally with the valve body 113 and valve body 114 from the same resin material.

[0038] Furthermore, when the rotary damper 100 is manufactured or maintained, the valve bodies 113, 114, which are integrally connected to each other by the valve position regulating body 115, can be simultaneously placed in or removed from the inter-partition regions 108, 112, respectively.

[0039] The rotor support portion 118 is a cylindrical portion that rotatably supports one end of the shaft body 121 of the rotor 120. The rotor support portion 118 liquid-tightly supports the shaft body 121 of the rotor 120 via a seal material 118a made of an O-ring. In addition, an attachment piece 119 is formed on the outer periphery of the housing body 102 in a state of protruding radially outward for attachment to one of two components (not shown) to which the rotary damper 100 is to be attached.

[0040] The rotor 120 is disposed within the inner chamber 103 of the housing 101 and divides the inner chamber 103 into four spaces, i.e., individual chambers R1, R2, R3 and R4. The rotor 120 rotates within the inner chamber 103 to increase or decrease the volume of each of the individual chambers R1, R2, R3 and R4, and is mainly composed of a shaft 121 and movable vanes 122, 123.

[0041] The shaft body 121 is a cylindrical part that supports the movable vanes 122 and 123, and is made of aluminum, iron, zinc, or various resin materials such as polyamide resin. In this case, the valve position regulating body 115 is fitted to the cover body 124 side of the outer circumferential part of the shaft body 121. The inner circumferential part of the shaft body 121 is a part for connecting to the other part of the two parts to which the rotary damper 100 is attached, and in this embodiment, is made up of a part whose cross section is formed in a circular shape and a part whose cross section is formed in a hexagonal shape. The shaft body 121 is rotatably supported by the rotor support part 118 of the housing main body 102 and the rotor support part 124a of the cover body 124.

[0042] The movable vanes 122, 123 are components for dividing the interior of the inner chamber 103 into a plurality of spaces and increasing or decreasing the volume of each of these spaces in a liquid-tight manner, and are each formed of a plate-like body extending in the radial direction of the shaft body 121 (inner chamber 103). In this case, these two movable vanes 122, 123 are formed to extend in opposite directions (in other words, on the same imaginary plane) via the shaft body 121.

[0043] In addition, the housing sliding parts 122a, 123a of these two movable vanes 122, 123, which are the outer peripheral end faces, are formed into a convex curved surface corresponding to the concave inner peripheral surface 103a of the inner chamber 103, and slide against this inner peripheral surface 103a. In this case, in this embodiment, a small gap is formed between the housing sliding parts 122a, 123a and the inner peripheral surface 103a, so that a small amount of fluid 130 flows when the movable vanes 122, 123 slide. In addition, the end faces of the movable vanes 122, 123 on the cover body 124 side are formed with restrictor grooves 122b, 123b, into which the valve position restrictor 115 fits, on the radially inner parts.

[0044] The lid 124 is a component for liquid-tightly sealing the inner chamber 103 formed in the housing body 102 and supporting the rotor 120 in a freely rotatable state, and is configured by forming aluminum, iron, zinc, or various resin materials such as polyamide resin into a flat ring shape. The lid 124 is formed with a through-hole-shaped rotor support portion 124a that rotatably supports the shaft 121 of the rotor 120, and a communication flow path 125 is formed on the inner surface of the lid 124.

[0045] The communication flow passage 125 is a portion that constitutes a bypass flow passage for the fluid 130 contained in the inner chamber 103, and is formed in an annular shape extending circumferentially on part of the inner surface of the lid body 124. In this embodiment, the communication flow passage 125 is formed in a shape cut out in a substantially L-shape in cross section.

[0046] The lid 124 is attached to the opening 102a of the housing body 102 by crimping, which bends the opening 102a inward. In this case, the lid 124 has seal members 126a and 126b made of O-rings disposed on the inner and outer edges of the inner surface thereof, thereby sealing the inner chamber 103 in a liquid-tight manner.

[0047] The fluid 130 is a material for applying a damping function to the rotary damper 100 by applying resistance to the movable vanes 122, 123 rotating in the inner chamber 103, and is filled in the inner chamber 103. The fluid 130 is made of a liquid, gel, or semi-solid material having a flowability with a viscosity according to the specifications of the rotary damper 100. In this case, the viscosity of the fluid 130 is appropriately selected according to the specifications of the rotary damper 100. In this embodiment, the fluid 130 is made of oil, for example, mineral oil or silicone oil. Note that in Figs. 4 and 5, the fluid 130 is shown only in a hatched area surrounded by a dashed circle.

[0048] (Operation of rotary damper 100) Next, a description will be given of the operation of the rotary damper 100 configured as described above. The rotary damper 100 generates a damping force when a mechanism in which two parts in a self-propelled vehicle tilt relatively to one another, for example, when a seat back of a reclining seat reclines onto a seat cushion.

[0049] Specifically, in the rotary damper 100, when the seat back rises from a state inclined onto the seat cushion as shown in Fig. 9, the rotor 120 rotates clockwise as shown in the figure (see the dashed arrow in the figure). That is, in the rotary damper 100, the movable vane 122 rotates toward the fixed vane 105, and the movable vane 123 rotates toward the fixed vane 104. Note that Fig. 9 shows only the side of the fixed vane 104.

[0050] In this case, in the inner chamber 103, the fluid 130 flows from the private chamber R4 into the inter-partition region 108 (see the solid arrow in the figure), and the fluid 130 flows from the private chamber R2 into the inter-partition region 112 via the first valve flow paths 106a, 110a, respectively. As a result, in the inter-partition regions 108, 112, the valve body 113 and the valve body 114 rotate integrally around the shaft body 121 as the rotation center toward the second valve partition walls 107, 111 (clockwise in the figure), and come into close contact with the second valve partition walls 107, 111. In this case, the valve bodies 113, 114 are formed in a shape such that the fourth valve flow paths 113b, 114b, which are in close contact with the second-valve partitions 107, 111, respectively, only partially block the second-valve flow paths 107a, 111a, while maintaining the other parts open, thereby maintaining the second-valve flow paths 107a, 111a in an open state.

[0051] As a result, within the inner chamber 103, the fluid 130 in the private chamber R4 flows into the private chamber R1 via the first valve flow path 106a, the third valve flow path 116, the fourth valve flow path 113b, and the second valve flow path 107a, and the fluid 130 in the private chamber R2 flows into the private chamber R3 via the first valve flow path 110a, the third valve flow path 117, the fourth valve flow path 114b, and the second valve flow path 111a.

[0052] In this case, the inter-partition region 108 and the inter-partition region 112 communicate with each other via the communication flow passage 125, so there is no pressure between the individual chambers R1 to R4. As a result, the rotary damper 100 rotates the rotor 120 in the clockwise direction as shown in the figure while generating a damping force that is smaller than the damping force in the counterclockwise direction as shown in the figure, which will be described later.

[0053] On the other hand, when the seat back is tilted from an upright state to a folded state onto the seat cushion, the rotor 120 of the rotary damper 100 rotates counterclockwise as shown in Fig. 10 (see the dashed arrow in the figure). That is, in the rotary damper 100, the movable vane 122 rotates toward the fixed vane 104, and the movable vane 123 rotates toward the fixed vane 105. Note that Fig. 10 shows only the fixed vane 104 side.

[0054] In this case, in the inner chamber 103, the fluid 130 flows from the private chamber R1 into the inter-partition region 108 (see the solid arrow in the figure), and the fluid 130 flows from the private chamber R3 into the inter-partition region 112 via the second valve flow paths 107a, 111a, respectively. As a result, in the inter-partition regions 108, 112, the valve body 113 and the valve body 114 rotate integrally around the shaft body 121 toward the first valve partition walls 106, 110 (counterclockwise in the figure) and come into close contact with the first valve partition walls 106, 110. In this case, the flow path closing portions 113a, 114a of the valve bodies 113, 114 that come into close contact with the first valve partition walls 106, 110, respectively, completely block the first valve flow paths 106a, 110a.

[0055] As a result, the partition regions 108, 112 block the flow of the fluid 130 between the compartments R1 and R4, and also block the flow of the fluid 130 between the compartments R3 and R2. Therefore, the compartments R1 and R3 are in a higher pressure state than the compartments R2 and R4 because the fluid 130 in each compartment flows into the compartments R2 and R4 through a small gap between the housing sliding parts 122a, 123a of the movable vanes 122, 123 and the inner peripheral surface 103a of the inner compartment.

[0056] As a result, the rotor 120 rotates counterclockwise in the drawing in the rotary damper 100 while generating a damping force larger than the damping force in the counterclockwise direction in the drawing. In this case, in the rotary damper 100, the inter-partition region 108 and the inter-partition region 112 communicate with each other via the communication flow path 125, and therefore the occurrence of a pressure difference between the private chambers R1 and R3, which are in a high-pressure state, is suppressed, and therefore a stable damping force can be generated.

[0057] As can be understood from the explanation of the operating method above, according to the above embodiment, in the rotary damper 100, inter-partition areas 108, 112 are formed in the fixed vanes 104, 105 against which the outer peripheral surface of the shaft body 121 of the rotor 120 slides, and the valve bodies 113, 114 are provided in these inter-partition areas 108, 112, so that the valve bodies 113, 114 do not slide against the rotor 120 as part of the fixed vanes 104, 105, and therefore the configuration of the valve bodies 113, 114 can be simplified and the burden of assembly work, including maintenance, can be reduced.

[0058] Furthermore, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the present invention. In the description of each modification, the same reference numerals are used to designate the same parts as those in the above-described embodiment, and redundant description will be omitted.

[0059] For example, in the above embodiment, the first valve flow paths 106a, 110a are formed at the end of the first valve partition 106, 110 on the shaft body 121 side. That is, the first valve flow paths 106a, 110a are formed between the first valve partition 106, 110 and the outer circumferential surface of the shaft body 121. However, the first valve flow paths 106a, 110a may be formed by cutting out any position of the first valve partition 106, 110. Therefore, the first valve flow paths 106a, 110a may be formed midway through the first valve partition 106, 110, or on the inner circumferential surface 103a side of the inner chamber.

[0060] In the above embodiment, the second valve flow paths 107a, 111a are formed at the end of the second valve partition 107, 111 on the shaft body 121 side. That is, the second valve flow paths 107a, 111a are formed between the second valve partition 107, 111 and the outer circumferential surface of the shaft body 121. However, the second valve flow paths 107a, 111a may be formed by cutting out any position of the second valve partition 107, 111. Therefore, the second valve flow paths 107a, 111a may be formed midway through the second valve partition 107, 111, or on the inner circumferential surface 103a side of the inner chamber.

[0061] Furthermore, in the above embodiment, the valve position regulating body 115 is formed in a ring shape that fits onto the shaft body 121, and is configured to position the valve bodies 113, 114 on the shaft body 121 side within the inter-partition regions 108, 112. However, it is only necessary that the valve position regulating body 115 is configured to position the valve bodies 113, 114 on one of the inner circumferential surface side of the housing body 102 and the outer circumferential surface side of the shaft body 121, and form the third valve flow paths 116, 117 on the other side.

[0062] Therefore, for example, the valve position regulating body 115 may be configured as a convex protrusion on the inner peripheral surface of the housing main body 102 in the inter-partition regions 108, 112, which regulates the displacement of the valve bodies 113, 114 toward the inner peripheral surface. In this case, it is natural that the protrusion constituting the valve position regulating body 115 is formed to a size that can secure the third valve flow paths 116, 117. The valve position regulating body 115 may also be configured as a convex protrusion on the outer peripheral surface of the shaft body 121 in the inter-partition regions 108, 112, which regulates the displacement of the valve bodies 113, 114 toward the outer peripheral surface. In this case, the third valve flow paths 116, 117 are formed on the outer peripheral surface side of the shaft body 121 in the inter-partition regions 108, 112. The protruding valve position regulating body 115 may also be provided on the part of the valve bodies 113, 114 facing the inner peripheral surface of the housing main body 102 or on the part facing the outer peripheral surface of the shaft body 121.

[0063] 11 , the valve position regulating body 115 is formed on a portion of the valve body 113 facing the inner circumferential surface of the housing main body 102, i.e., on the outer circumferential part of the valve body 113 radially outward from the shaft body 121. In this case, the end of the valve body 113 on the shaft body 121 side is not provided with the ring-shaped valve position regulating body 115 in the above embodiment, and slides on the outer circumferential surface of the shaft body 121.

[0064] In the above embodiment, the valve position regulating body 115 is configured to connect the two valve bodies 113 and 114. However, when there are three or more valve bodies, the valve position regulating body 115 can connect at least two of the valve bodies, and can also connect all of the valve bodies. Also, the valve position regulating body 115 can be provided for each of the valve bodies 113 and 114 as described above.

[0065] In the above embodiment, the rotary damper 100 is configured by providing inter-partition areas 108, 112 and valve bodies 113, 114 for every two fixed vanes 104 and two movable vanes 122, 123. However, the rotary damper 100 may be configured to include at least one inter-partition area and one valve body. In this case, the rotary damper 100 may be configured to include fewer inter-partition areas and valve bodies than the number of fixed vanes and / or movable vanes, for two or more fixed vanes and / or movable vanes.

[0066] In the above embodiment, the rotary damper 100 is configured such that the communication flow passage 125 is formed on the surface of the cover body 124 facing the inner chamber 103, and the valve bodies 113, 114 communicate with this communication flow passage 125. This allows the rotary damper 100 to suppress the occurrence of a pressure difference between the private chambers R1 and R3, which communicate with each other through the communication flow passage 125, and to generate a stable damping force with high accuracy. In this case, the communication flow passage 125 can be formed in the shaft body 121 instead of or in addition to the cover body 124. The rotary damper 100 can also be configured without the communication flow passage 125, as shown in FIG. 11.

[0067] In the above embodiment, the valve bodies 113, 114 are formed in a thin plate shape. However, the thickness of the valve bodies 113, 114 is appropriately determined depending on the flow rate of the fluid 130 circulating between each of the individual chambers R1 to R4. Therefore, the valve bodies 113, 114 can also be formed in a plate shape extending in the axial direction of the shaft body 121, as shown in Fig. 12. In this case, the valve bodies 113 and 114 can be connected to each other by a cylindrical valve position regulating body 115.

[0068] In the above embodiment, the valve body 113 functions as a one-way valve that allows the flow of the fluid 130 from the compartment R4 to the compartment R1 and prevents the flow of the fluid 130 from the compartment R1 to the compartment R4. The valve body 114 functions as a one-way valve that allows the flow of the fluid 130 from the compartment R2 to the compartment R3 and prevents the flow of the fluid 130 from the compartment R3 to the compartment R2. However, the valve bodies 113 and 114 may be configured as two-way valves that allow different flow rates of the fluid 130 to flow between the two compartments.

[0069] In the above embodiment, the rotary damper 100 is configured by providing two inter-partition areas 108, 112 and two valve bodies 113, 114 on the fixed vanes 104, 105. However, the rotary damper 100 can also be configured by providing the inter-partition areas 108, 112 and the valve bodies 113, 114 on the movable vanes 122, 123.

[0070] 12 shows a rotor 120 in which the first valve partition 106, the first valve flow path 106a, the second valve partition 107, and the second valve flow path 107a are formed in the movable vane 122 to form an inter-partition area 108, and the valve body 113 is disposed in this inter-partition area 108. In this case, the first valve partition 110, the first valve flow path 110a, the second valve partition 111, and the second valve flow path 111a are formed in the movable vane 123 as in the movable vane 122 to form an inter-partition area 112, and the valve body 114 can be disposed in this inter-partition area 112.

[0071] According to this, the valve body 113 functions as a one-way valve that allows the flow of the fluid 130 from the chamber R1 to the chamber R2 and prevents the flow of the fluid 130 from the chamber R2 to the chamber R1 when the rotor 120 rotates. Also, the valve body 114 functions as a one-way valve that allows the flow of the fluid 130 from the chamber R3 to the chamber R4 and prevents the flow of the fluid 130 from the chamber R4 to the chamber R3 when the rotor 120 rotates.

[0072] In the above embodiment, the rotary damper 100 divides the single inner chamber 103 into four individual chambers, that is, the individual chamber R1, the individual chamber R2, the individual chamber R3, and the individual chamber R4, by the fixed vanes 104, 105 and the movable vanes 122, 123. However, it is sufficient that the rotary damper 100 is configured to have at least two individual chambers.

[0073] In the above embodiment, the rotary damper 100 has the housing 101 as the fixed side and the rotor 120 as the movable side. However, the rotation of the rotor 120 with respect to the housing 101 in the rotary damper 100 is relative. Therefore, it is natural that the rotary damper 100 can have the housing 101 as the movable side and the rotor 120 as the fixed side.

[0074] In the above embodiment, the rotary damper 100 is described as being attached to a reclining seat mechanism. However, the rotary damper 100 can be attached to a mechanism in which two parts of a self-propelled vehicle are inclined relative to one another, such as an armrest, an ottoman, a glove box, a tailgate, or a back door of a four-wheeled self-propelled vehicle. [Explanation of symbols]

[0075] R1~R4: Private rooms, 100...rotary damper, 101...housing, 102...housing body, 102a...opening, 103...inner chamber, 103a...inner chamber inner circumferential surface, 104, 105...fixed vane, 104a, 105a...rotor sliding portion, 106...first valve partition, 106a...first valve flow path, 107...second valve partition, 107a...second valve flow path, 108...area between partitions, 110...first valve partition, 110a...first valve flow path, 111...second valve partition, 111a...second valve flow path, 112...inter-partition area, 113...valve body, 113a...flow path closing portion, 113b...fourth valve flow path, 114...valve body, 114a...flow path closing portion, 114b...fourth valve flow path, 115...valve position regulating body, 116, 117...third valve flow path, 118...rotor support portion, 118a...sealing material, 119...mounting piece, 120... rotor, 121... shaft body, 122, 123... movable vane, 122a, 123a... housing sliding portion, 122b, 123b... regulating body groove, 124... lid body, 124a... rotor support portion, 125... communication flow path, 126a, 126b... sealing material, 130...fluid.

Claims

1. a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid, and a fixed vane formed in the inner chamber in a radially extending wall shape for preventing a circumferential flow of the fluid; a rotor having movable vanes on an outer periphery of a shaft body, the movable vanes rotating while dividing the inner chamber and pushing the fluid toward the fixed vanes; a cover provided on the housing to close the inner chamber in a liquid-tight manner, A rotary damper in which a plurality of individual chambers are formed within the inner chamber by the fixed vanes and the movable vanes, and the volumes of the individual chambers increase or decrease with rotation of the movable vanes, The fixed vane is a rotor sliding portion having a tip portion extending from the housing and sliding against an outer circumferential surface of the shaft; a first valve partition wall formed in a wall shape along a radial direction of the shaft between an inner circumferential surface of the housing and an outer circumferential surface of the shaft; a first valve flow path formed by cutting out a portion of the first valve partition wall and communicating with one of the plurality of individual chambers through which the fluid flows; a second valve partition wall formed in a wall shape along a radial direction of the shaft body between an inner peripheral surface of the housing and an outer peripheral surface of the shaft body at a position circumferentially separated from the first valve partition wall in the inner chamber; a second valve flow path in which the fluid flows, the second valve flow path being formed by cutting out a part of the second valve partition wall and communicating with a separate chamber among the plurality of separate chambers that is different from a chamber communicating with the first valve flow path, In the partition region between the first valve partition and the second valve partition, a valve body is provided in the inter-partition region so as to have a width narrower than that of the inter-partition region and a length shorter than a radial length of the shaft body in the inter-partition region and to be allowed to displace in the circumferential direction, At least one of the housing, the rotor, and the valve body has a valve position restricting body is provided for positioning the valve body on one of an inner peripheral surface side of the housing and an outer peripheral surface side of the shaft body, and forming a third valve flow path on the other side, The valve body is a flow path blocking portion capable of blocking one of the first valve flow path and the second valve flow path; a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path, The inter-partition region is provided in plurality, The valve body is provided in each of the inter-partition regions that are different from each other, The valve position restricting body is a third valve flow passage formed on an inner peripheral surface side of the housing by positioning the valve body on the outer peripheral surface side of the shaft body, and the valve bodies in the different inter-partition regions are integrally connected to each other.

2. a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid, and a fixed vane formed in the inner chamber in a radially extending wall shape for preventing a circumferential flow of the fluid; a rotor having movable vanes on an outer periphery of a shaft body, the movable vanes rotating while dividing the inner chamber and pushing the fluid toward the fixed vanes; a cover provided on the housing to close the inner chamber in a liquid-tight manner, A rotary damper in which a plurality of individual chambers are formed within the inner chamber by the fixed vanes and the movable vanes, and the volumes of the individual chambers increase or decrease with rotation of the movable vanes, The fixed vane is a rotor sliding portion having a tip portion extending from the housing and sliding against an outer circumferential surface of the shaft; a first valve partition wall formed in a wall shape along a radial direction of the shaft between an inner circumferential surface of the housing and an outer circumferential surface of the shaft; a first valve flow path formed by cutting out a portion of the first valve partition wall and communicating with one of the plurality of individual chambers through which the fluid flows; a second valve partition wall formed in a wall shape along a radial direction of the shaft body between an inner peripheral surface of the housing and an outer peripheral surface of the shaft body at a position circumferentially separated from the first valve partition wall in the inner chamber; a second valve flow path in which the fluid flows, the second valve flow path being formed by cutting out a part of the second valve partition wall and communicating with a separate chamber among the plurality of separate chambers that is different from a chamber communicating with the first valve flow path, In the partition region between the first valve partition and the second valve partition, a valve body is provided in the inter-partition region so as to have a width narrower than that of the inter-partition region and a length shorter than a radial length of the shaft body in the inter-partition region and to be allowed to displace in the circumferential direction, At least one of the housing, the rotor, and the valve body has a valve position restricting body is provided for positioning the valve body on one of an inner peripheral surface side of the housing and an outer peripheral surface side of the shaft body, and forming a third valve flow path on the other side, The valve body is a flow path blocking portion capable of blocking one of the first valve flow path and the second valve flow path; a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path, The inter-partition region is provided in plurality, The valve body is provided in each of the inter-partition regions that are different from each other, At least one of the rotor and the lid is a communication flow passage formed in a groove shape extending between the valve bodies in each of the partition wall regions different from each other, At least two of the valve bodies through which the communication flow passage extends are The rotary damper, wherein the fourth valve flow passages are each in communication with the communication flow passages.

3. a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid, and a fixed vane formed in the inner chamber in a radially extending wall shape for preventing a circumferential flow of the fluid; a rotor having movable vanes on an outer periphery of a shaft body, the movable vanes rotating while dividing the inner chamber and pushing the fluid toward the fixed vanes; a cover provided on the housing to close the inner chamber in a liquid-tight manner, A rotary damper in which a plurality of individual chambers are formed within the inner chamber by the fixed vanes and the movable vanes, and the volumes of the individual chambers increase or decrease with rotation of the movable vanes, The movable vane is a housing sliding portion having a tip portion extending from the shaft body and sliding against an inner peripheral surface of the housing; a first valve partition wall formed in a wall shape along a radial direction of the shaft between an inner circumferential surface of the housing and an outer circumferential surface of the shaft; a first valve flow path formed by cutting out a portion of the first valve partition wall and communicating with one of the plurality of individual chambers through which the fluid flows; a second valve partition wall formed in a wall shape along a radial direction of the shaft body between an inner peripheral surface of the housing and an outer peripheral surface of the shaft body at a position spaced apart in a circumferential direction of the inner chamber from the first valve partition wall; a second valve flow path in which the fluid flows, the second valve flow path being formed by cutting out a part of the second valve partition wall and communicating with a separate chamber among the plurality of separate chambers that is different from a chamber communicating with the first valve flow path, In the partition region between the first valve partition and the second valve partition, a valve body is provided in the inter-partition region so as to have a width narrower than that of the inter-partition region and a length shorter than a radial length of the shaft body in the inter-partition region and to be allowed to displace in the circumferential direction, At least one of the housing, the rotor, and the valve body has a valve position restricting body is provided for positioning the valve body on one of an inner peripheral surface side of the housing and an outer peripheral surface side of the shaft body, and forming a third valve flow path on the other side, The valve body is a flow path blocking portion capable of blocking one of the first valve flow path and the second valve flow path; a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path, The inter-partition region is provided in plurality, The valve body is provided in each of the inter-partition regions that are different from each other, The valve position restricting body is a third valve flow passage formed on an inner peripheral surface side of the housing by positioning the valve body on the outer peripheral surface side of the shaft body, and the valve bodies in the different inter-partition regions are integrally connected to each other.

4. a housing having a cylindrical inner chamber for liquid-tightly accommodating a fluid, and a fixed vane formed in the inner chamber in a radially extending wall shape for preventing a circumferential flow of the fluid; a rotor having movable vanes on an outer periphery of a shaft body, the movable vanes rotating while dividing the inner chamber and pushing the fluid toward the fixed vanes; a cover provided on the housing to close the inner chamber in a liquid-tight manner, A rotary damper in which a plurality of individual chambers are formed within the inner chamber by the fixed vanes and the movable vanes, and the volumes of the individual chambers increase or decrease with rotation of the movable vanes, The movable vane is a housing sliding portion having a tip portion extending from the shaft body and sliding against an inner peripheral surface of the housing; a first valve partition wall formed in a wall shape along a radial direction of the shaft between an inner circumferential surface of the housing and an outer circumferential surface of the shaft; a first valve flow path formed by cutting out a portion of the first valve partition wall and communicating with one of the plurality of individual chambers through which the fluid flows; a second valve partition wall formed in a wall shape along a radial direction of the shaft body between an inner peripheral surface of the housing and an outer peripheral surface of the shaft body at a position spaced apart in a circumferential direction of the inner chamber from the first valve partition wall; a second valve flow path in which the fluid flows, the second valve flow path being formed by cutting out a part of the second valve partition wall and communicating with a separate chamber among the plurality of separate chambers that is different from a chamber communicating with the first valve flow path, In the partition region between the first valve partition and the second valve partition, a valve body is provided in the inter-partition region so as to have a width narrower than that of the inter-partition region and a length shorter than a radial length of the shaft body in the inter-partition region and to be allowed to displace in the circumferential direction, At least one of the housing, the rotor, and the valve body has a valve position restricting body is provided for positioning the valve body on one of an inner peripheral surface side of the housing and an outer peripheral surface side of the shaft body, and forming a third valve flow path on the other side, The valve body is a flow path blocking portion capable of blocking one of the first valve flow path and the second valve flow path; a fourth valve flow path that communicates the other of the first valve flow path and the second valve flow path with the third valve flow path, The inter-partition region is provided in plurality, The valve body is provided in each of the inter-partition regions that are different from each other, At least one of the rotor and the lid is a communication flow passage formed in a groove shape extending between the valve bodies in each of the partition wall regions different from each other, At least two of the valve bodies through which the communication flow passage extends are The rotary damper, wherein the fourth valve flow passages are each in communication with the communication flow passages.

5. A rotary damper according to claim 1 or claim 3, The inter-partition region is provided in plurality, The valve body is provided in each of the inter-partition regions that are different from each other, At least one of the rotor and the lid is a communication flow passage formed in a groove shape extending between the valve bodies in each of the partition wall regions different from each other, At least two of the valve bodies through which the communication flow passage extends are The rotary damper, wherein the fourth valve flow passages are each in communication with the communication flow passages.

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