JP2020175696A - Restraint device, rotary damper, and arm rest - Google Patents

Abstract

To provide a restraint device, a rotary damper, and an arm rest capable of restraint movement of an object so as not to allow the object stationary at a predetermined position to start to move, as well as, enhancing operability of the object.SOLUTION: A restraint device comprises: an elastic member 34; stoppers 35; first means (first pressing parts 36); and second means (second pressing parts 37). The stopper 35 prevents a forward rotation of the elastic member 34 when force rotating the elastic member 34 is less than a set value. The first means (36) deforms the elastic member 34 in order to cause the elastic member 34 to rotate forward passing through the stopper 35 when the force rotating the elastic member 34 is equal to or greater than the set value. The second means (37) deforms the elastic member 34 with force less than the set value in order to cause the elastic member 34 having passed through the stopper 35 to rotate backward to return to a start position of the forward rotation of the elastic member 34 passing through the stopper 35 again.SELECTED DRAWING: Figure 6

Description

The present invention relates to a restraining device capable of stopping the movement of an article that is stationary at a predetermined position so that the article does not start moving, a rotary damper provided with the stopping device, and an armrest provided with the stopping device or the rotary damper. Regarding.

Conventionally, an armrest that can be stored in the backrest of the rear seat of an automobile has been known. The armrest housed in the backrest is stationary at the storage position due to the friction generated between the contact surface between the armrest and the backrest. However, due to the weak frictional force, when the automobile decelerates rapidly, the armrest rotates from the storage position toward the seat of the rear seat, causing a phenomenon of popping out. In particular, since the multifunctional armrest is heavy, it is likely to cause unintended rotation. In addition, because the multifunctional armrests are heavy, in the rear seats where the backrest can be folded over the seat, the armrests do not rise together with the backrest when raising the backrest, and the seat does not rise. There was a phenomenon of being left behind.

Patent Document 1 below discloses a technique of utilizing the braking force of a rotary damper in order to stop the movement of the armrest so that the armrest stationary at the storage position does not start moving. However, in this technique, a rotary damper is required to output a large braking force in order to cope with a sudden deceleration of an automobile. On the other hand, in the rotary damper adopted in this technology, the magnitude of the braking force does not change depending on the rotation angle, so that the large braking force of the rotary damper continues to be applied to the armrest even after the restraint is released. As a result, the speed of the armrest becomes excessively slow when the armrest rotates from the storage position to the use position. Further, in the rotary damper adopted in this technology, since the magnitude of the braking force does not change depending on the rotation direction, a large braking force is applied to the armrest even when the armrest is rotated from the used position to the stored position. Therefore, a large force is required when storing the armrest.

JP-A-2002-06767

An object to be solved by the present invention is to make it possible to stop the movement of an article so that the article stationary at a predetermined position does not start to move, and to improve the operability of the article.

In order to solve the above problems, the present invention provides the following restraining devices, rotary dampers, and armrests.
1. 1. The elastic member, the stopper, the first means, and the second means are provided, and the elastic member is rotatably provided, and the stopper comes into contact with the elastic member at the start position of the forward rotation of the elastic member. When the force for rotating the elastic member is less than the set value, the forward rotation of the elastic member is prevented, and the first means is the elastic member when the force for rotating the elastic member is greater than or equal to the set value. The elastic member is deformed in order to pass through the stopper and rotate forward, and in the second means, the elastic member that has passed through the stopper rotates in the reverse direction and passes through the stopper again to pass through the stopper to the start position. A restraining device that deforms the elastic member with a force less than the set value in order to return to.
2. The first means is a first pushing portion, and the first pushing portion is provided at a distance from the stopper and comes into contact with the stopper in order to deform the elastic member. The restraint device according to 1 above, which pushes the elastic member.
3. 3. The second means is a second pushing portion, and the second pushing portion is provided at a distance from the stopper and comes into contact with the stopper in order to deform the elastic member. The restraint device according to 1 above, which pushes the elastic member.
4. The first means is a first push portion, the second means is a second push portion, and the first push portion is provided at a distance from the stopper. In order to deform the elastic member, the elastic member in contact with the stopper is pushed, and the second push portion is larger than the distance between the stopper and the first push portion between the stopper and the stopper. The restraint device according to 1 above, which is provided at intervals and pushes the elastic member in contact with the stopper in order to deform the elastic member.
5. The restraining device according to 1 above, wherein the portion of the elastic member in contact with the stopper and the portion of the stopper in contact with the elastic member are curved surfaces.
6. A holding member having a groove for holding the elastic member is provided, the first means is formed at the end of one wall surface of the groove, and the second means is formed at the end of the other wall surface of the groove. The restraint device according to 1 above.
7. The restraint device according to 1, wherein the stopper and the first means are respectively arranged at two positions with respect to the single elastic member.
8. A rotary damper including the restraining device according to any one of 1 to 7 above.
9. 8. The rotary damper according to 8 above, which includes a rotor and whose magnitude of braking force changes depending on the rotation direction of the rotor.
10. An armrest including the restraining device according to any one of 1 to 7 above.
11. An armrest having the rotary damper according to 8 or 9 above.

According to the present invention, a stopper is provided that contacts the elastic member at the start position of the forward rotation of the elastic member and prevents the elastic member from rotating forward when the force for rotating the elastic member is less than a set value. Therefore, it is possible to stop the movement of the article so that the article that is stationary at a predetermined position does not start moving. Further, according to the present invention, the elastic member that has passed through the stopper rotates in the reverse direction, passes through the stopper again, and returns to the start position of the forward rotation of the elastic member. Therefore, the elastic member is pressed with a force less than a set value. Since the second means for deforming is provided, it is possible to improve the operability of the article.

It is a schematic diagram of the back seat of an automobile. It is a vertical sectional view of a rotary damper. It is a cross-sectional view of a rotary damper. It is a vertical cross-sectional view of a rotor, and shows a state in which a check valve is closed. It is a vertical cross-sectional view of a rotor, and shows a state in which a check valve is open. It is a top view of a rotary damper. It is a top view of the holding member. It is a figure which shows the distance between the 1st push part and a stopper, and the distance between a 2nd push part and a stopper. It is a figure for demonstrating the operation of a stop device. It is a figure for demonstrating the operation of a stop device. It is a figure for demonstrating the operation of a stop device. It is a figure for demonstrating the operation of a stop device. It is a figure which shows another Example. It is a figure which shows still another Example.

Hereinafter, embodiments for carrying out the present invention will be described based on examples of the present invention, but the technical scope of the present invention is not limited to the contents of the following description.

An embodiment is a rotary damper 11 used for the armrest 10. However, the rotary damper 11 is not limited to the armrest 10, and can be applied to various articles. As shown in FIG. 1, the armrest 10 is installed in the rear seat of an automobile having a seat portion 12 and a backrest portion 13, is placed on the seat portion 12 when in use, and is stored in the backrest portion 13 when stored. Will be done.

The rotary damper 11 is a component or product that produces a braking force for reducing the rotational speed of an article. In the present invention, various types of rotary dampers can be adopted. For example, the rotary damper applied to the armrest preferably includes a rotor and the magnitude of the braking force changes depending on the rotation direction of the rotor. The rotary damper 11 adopted in the embodiment includes a housing 15, a rotor 14, oil, and two check valves. The check valve is provided to change the magnitude of the braking force depending on the rotation direction of the rotor 14.

As shown in FIG. 2, the housing 15 projects from the cylindrical peripheral wall 16, the bottom wall 17 that closes the opening on one end side of the peripheral wall 16, the lid 18 that closes the opening on the other end side of the peripheral wall 16, and the peripheral wall 16. It is configured to have a flange 19. As shown in FIGS. 2 to 4, the rotor 14 is configured to have a shaft 20 supported by a bottom wall 17 and a lid 18, and two vanes 21a, 21b protruding from the shaft 20. As shown in FIG. 3, inside the housing 15, there are four chambers (first chamber 23, second chamber 24, and two chambers 22a and 22b protruding from the peripheral wall 16 and vanes 21a and 21b. A third chamber 25 and a fourth chamber 26) are formed. The oil is filled in the first to fourth chambers 23 to 26. As shown in FIG. 4, one check valve has a large diameter first hole 27 that communicates with the first chamber 23, and a small diameter second hole 27 that communicates the first hole 27 with the second chamber 24. It is composed of a hole 28 and a spherical first valve body 29 provided in the first hole 27. The other check valve has a large-diameter third hole 30 that communicates with the third chamber 25, a small-diameter fourth hole 31 that communicates the third hole 30 and the fourth chamber 26, and a third hole. It is configured to have a spherical second valve body 32 provided in 30. The first hole 27 and the second hole 28 are formed in the vane 21a that separates the first chamber 23 and the second chamber 24, and the third hole 30 and the fourth hole 31 are the third chamber 25 and the third. It is formed in a vane 21b that partitions the chamber 26 of 4.

When the rotary damper 11 is applied to the armrest 10, the rotary damper 11 is installed so that the rotor 14 rotates with the rotation of the armrest 10. For example, the housing 15 is fixed to the frame of the backrest 13 with bolts inserted into the holes 33 formed in the flange 19, and the shaft 20 is connected to the frame of the armrest 10.

When the armrest 10 rotates from the storage position to the use position, the rotor 14 rotates in one direction accordingly, and one vane 21a presses the oil in the first chamber 23 to release the oil in the first chamber 23. It flows into the first hole 27 and presses the first valve body 29 against the valve seat formed at the boundary between the first hole 27 and the second hole 28 (see FIG. 4). Further, the other vane 21b presses the oil in the third chamber 25, so that the oil in the third chamber 25 flows into the third hole 30 and the second valve body 32 is made into the third hole 30 and the fourth hole 30. It is pressed against the valve seat formed at the boundary of the hole 31 (see FIG. 4). As a result, the check valve closes, so that the oil in the first chamber 23 does not pass through the second hole 28, but flows into the second chamber 24 through the gap between the vane 21a and the peripheral wall 16 and the like, and the third chamber 24 The oil in the chamber 25 does not pass through the fourth hole 31, but flows into the fourth chamber 26 through the gap between the other vane 21b and the peripheral wall 16. As a result, the resistance of the oil to the rotation of the rotor 14 increases and a braking force is generated. The rotational speed of the armrest 10 is reduced by the braking force output by the rotary damper 11. However, the present invention does not aim to stop the movement of the article by utilizing the braking force of the rotary damper. Therefore, the braking force of the rotary damper 11 is set to a size that allows the armrest 10 to rotate at an appropriate speed. This makes it possible to design the rotary damper 11 compactly.

When the armrest 10 rotates from the used position to the stored position, the rotor 14 rotates in the opposite direction accordingly, and one vane 21a presses the oil in the second chamber 24 to release the oil in the second chamber 24. It flows into the second hole 28 and keeps the first valve body 29 away from the valve seat (see FIG. 5). Further, the other vane 21b presses the oil in the fourth chamber 26, so that the oil in the fourth chamber 26 flows into the fourth hole 31 and keeps the second valve body 32 away from the valve seat (see FIG. 5). ). As a result, the check valve opens, so that the oil in the second chamber 24 passes through the first hole 27 and flows into the first chamber 23 through the gap between the vane 21a and the peripheral wall 16 and the like, and the fourth chamber 23 The oil in the chamber 26 passes through the third hole 30 and flows into the third chamber 25 through the gap between the other vane 21b and the peripheral wall 16. As a result, the resistance of the oil to the rotation of the rotor 14 becomes very small, so that the rotation speed of the armrest 10 is not decelerated by the braking force output by the rotary damper 11.

Since the magnitude of the braking force of the rotary damper 11 adopted in the embodiment changes depending on the rotation direction of the rotor 14, when the arm rest 10 is rotated from the storage position to the use position, a large braking force (arm rest 10) is applied to the rotary damper 11. When the rotation speed of the armrest 10 is decelerated by outputting the force that affects the rotation of the armrest 10 and the armrest 10 is rotated from the used position to the storage position, a small braking force (affecting the rotation of the armrest 10) is exerted on the rotary damper 11. It is possible to rotate the armrest 10 lightly by outputting a force that does not reach).

The rotary damper 11 adopted in the embodiment is configured to further include a restraining device. However, the restraining device may be manufactured and used independently of the rotary damper 11. The restraint device includes an elastic member, a stopper, a first means, and a second means.

The elastic member is a member formed of an elastic material such as a spring or rubber. As shown in FIG. 6, the elastic member 34 adopted in the embodiment is a leaf spring and has contact portions 38 at both ends. The elastic member 34 is provided so as to rotate forward and backward. As shown in FIG. 2, in the embodiment, the restraining device is further provided with the holding member 39. The holding member 39 is placed on the lid 18 and coupled to the shaft 20 so as to rotate with the rotor 14. The elastic member 34 rotates forward when the rotor 14 rotates in one direction, and rotates in the reverse direction when the rotor 14 rotates in the opposite direction.

As shown in FIG. 7, the holding member 39 has a groove 40 that holds the elastic member 34. The groove 40 suppresses deformation of a portion of the elastic member 34 inserted into the groove 40 (hereinafter, referred to as a part of the elastic member 34). That is, one wall surface 41 of the groove 40 suppresses the deformation of a part of the elastic member 34 when the elastic member 34 rotates in the reverse direction and the elastic member 34 is deformed, and the other wall surface 42 of the groove 40 is the elastic member. When the elastic member 34 is deformed by the forward rotation of the 34, the deformation of a part of the elastic member 34 is suppressed. According to the embodiment, since the groove 40 suppresses the deformation of the portion of the elastic member 34 that should not be deformed, the characteristics related to the restraint and the release of the restraint are stabilized.

The stopper is provided so as to come into contact with the elastic member at the start position of the forward rotation of the elastic member. As shown in FIG. 6, at the start position, the contact portion 38 is in contact with the stopper 35 in a state where the elastic member 34 is not deformed. As shown in FIG. 6, in the embodiment, the stopper 35 is formed on the flange 19. The stopper 35 has a cylindrical shape, and the portion of the stopper 35 in contact with the elastic member 34 is a curved surface. Since the portion of the elastic member 34 that comes into contact with the stopper 35, that is, the outer surface of the contact portion 38 is also curved, the contact portion 38 can be smoothly moved from the stop position (start position) to the release position, and the contact portion 38 can be smoothly moved. The 38 can be smoothly moved from the release position to the stop position.

The first means is a portion or a component that deforms the elastic member so that the elastic member passes through the stopper and rotates in the forward direction when the force for rotating the elastic member is equal to or more than a set value. As shown in FIG. 6, in the embodiment, the first push portion 36 is adopted as the first means. As shown in FIG. 8, the first pushing portion 36 is provided with a gap P1 between the first pushing portion 36 and the stopper 35. The first pushing portion 36 is a portion that pushes the elastic member 34 in contact with the stopper 35 in order to deform the elastic member 34. The distance P1 between the first pushing portion 36 and the stopper 35 is set to such a size that the elastic member 34 cannot be deformed so as to pass through the stopper 35 when the force for rotating the elastic member 34 is less than the set value. As shown in FIG. 7, in the embodiment, the first pushing portion 36 is formed at the end of one wall surface 41 of the groove 40, that is, at the angle where the one wall surface 41 of the groove 40 and the outer peripheral surface of the holding member 39 intersect. Has been done. This simplifies the configuration for deforming the elastic member 34.

The second means is to deform the elastic member with a force less than the set value so that the elastic member that has passed through the stopper rotates in the reverse direction and passes through the stopper again to return to the starting position of the forward rotation of the elastic member. Is. As shown in FIG. 6, in the embodiment, the second push portion 37 is adopted as the second means. As shown in FIG. 8, the second push portion 37 is provided between the stopper 35 and the stopper 35 with a distance P2 larger than the distance P1 between the stopper 35 and the first push portion 36. The second pushing portion 37 is a portion that pushes the elastic member 34 in contact with the stopper 35 in order to deform the elastic member 34. As shown in FIG. 8, the distance P2 between the second push portion 37 and the stopper 35 is larger than the distance P1 between the first push portion 36 and the stopper 35. Therefore, the second pushing portion 37 can deform the elastic member 34 with a force smaller than that of the first pushing portion 36. As shown in FIG. 7, in the embodiment, the second pushing portion 37 is the end of the other wall surface 42 of the groove 40, that is, the wall surface 43 of the recess formed in the other wall surface 42 of the groove 40 and the holding member 39. It is formed at the corner where This simplifies the configuration for deforming the elastic member 34. The recess is formed in the holding member 39 so that the elastic member 34 can be pushed by the second pushing portion 37 and deformed.

As shown in FIG. 6, in the embodiment, the stopper 35 and the first means (first pushing portion 36) are arranged at two places for each of the single elastic member 34. This configuration makes it possible to increase the force that restrains the movement of the article with a smaller number of parts.

When the restraint device is applied to the armrest 10, the restraint device is installed so that the elastic member 34 rotates with the rotation of the armrest 10. The restraint device may be applied to the armrest 10 independently of the rotary damper 11.

When the armrest 10 is stationary in the storage position, the elastic member 34 is not deformed, and the contact portion 38 is placed on the stopper 35 at the stopping position (this position is the start position of the forward rotation of the elastic member 34). Are in contact. FIG. 9 shows this state.

The force for rotating the elastic member 34 is generated by deceleration of the automobile or the like. In the embodiment, this force rotates the holding member 39, whereby the first pushing portion 36 pushes the elastic member 34 in contact with the stopper 35. The elastic member 34 rotates forward with the rotation of the holding member 39, and is deformed by being pushed by the first pushing portion 36. FIG. 10 shows this state.

When the force for rotating the elastic member 34 is less than the set value, the elastic member 34 is not deformed enough to pass through the stopper 35, so that the stopper 35 prevents the elastic member 34 from rotating forward. When the restraint device is applied to the armrest, the set value is set higher than the magnitude of the force generated when the vehicle suddenly decelerates. In the embodiment, the magnitude of the force generated when the automobile suddenly decelerates is assumed to be 10 Nm or less, and the set value is set to 11 Nm. Then, in the embodiment, even when the automobile decelerates suddenly, the movement of the armrest 10 can be stopped so that the armrest 10 stationary at the storage position does not start moving.

On the other hand, when the force for rotating the elastic member 34 is equal to or greater than the set value, the first pushing portion 36 deforms the elastic member 34 so that the elastic member 34 can pass through the stopper 35, and the contact portion 38 is in the release position. To reach. FIG. 11 shows this state. In the embodiment, the force for rotating the elastic member 34 at this time was 12 Nm. The armrest 10 can be rotated from the storage position to the use position by releasing the restraint by the restraint device.

When the armrest 10 is rotated from the used position to the stored position, the elastic member 34 rotates in the reverse direction as the holding member 39 rotates. Immediately before the armrest 10 reaches the storage position (that is, the elastic member 34 returns to the start position of forward rotation), the contact portion 38 comes into contact with the stopper 35. FIG. 11 shows this state.

The elastic member 34 in contact with the stopper 35 is pushed by the second pushing portion 37 and deformed by the further rotation of the holding member 39. FIG. 12 shows this state. Since the distance P2 between the second push portion 37 and the stopper 35 is larger than the distance P1 between the first push portion 36 and the stopper 35, the second push portion 37 is elastic with a smaller force than the first push portion 36. The member 34 can be deformed.

The second pushing portion 37 pushes the elastic member 34 by further rotation of the holding member 39, whereby the elastic member 34 is deformed so as to pass through the stopper 35, and the contact portion 38 is in the restraining position (the elastic member 34). Return to the start position of forward rotation). FIG. 9 shows this state. In the embodiment, in order to return the elastic member 34 to the start position of the forward rotation, the second pushing portion 37 deforms the elastic member 34 with a force of 3 Nm. The armrest 10 is stationary at the storage position, and restraint by the restraint device is started. According to the present invention, the restraint can be started (that is, the armrest 10 is stored) with a smaller force than when the restraint is released (in the embodiment, a force of 1/4 of the force when the restraint is released). Therefore, the operability is good.

On the other hand, in the foldable rear seat, the set value is set higher than the magnitude of the force generated when lifting the armrest in the used position. This makes it possible to raise the armrests together with the backrest without leaving the armrests on the seat when raising the folded backrest on the seat.

As shown in FIG. 13, the elastic member 34 may be installed so as to bypass the shaft 20. Further, as shown in FIG. 14, a plurality of elastic members 34 may be installed.

10 Armrest 11 Rotary damper 12 Seat 13 Backrest 14 Rotor 15 Housing 16 Peripheral wall 17 Bottom wall 18 Lid 19 Flange 20 Shaft 21 Vane 22 Bulkhead 23 First chamber 24 Second chamber 25 Third chamber 26 Fourth Room 27 1st hole 28 2nd hole 29 1st valve body 30 3rd hole 31 4th hole 32 2nd valve body 33 hole 34 Elastic member 35 Stopper 36 1st push part 37 2nd Pushing part 38 Contacting part 39 Holding member 40 Groove 41 One wall surface 42 The other wall surface 43 Recessed wall surface

Claims (11)

An elastic member, a stopper, a first means, and a second means are provided, the elastic member is rotatably provided, and the stopper comes into contact with the elastic member at a start position of forward rotation of the elastic member. When the force for rotating the elastic member is less than the set value, the forward rotation of the elastic member is prevented, and the first means is the elastic member when the force for rotating the elastic member is greater than or equal to the set value. The elastic member is deformed in order to pass through the stopper and rotate forward, and in the second means, the elastic member that has passed through the stopper rotates in the reverse direction and passes through the stopper again to pass through the stopper to the start position. A restraining device that deforms the elastic member with a force less than the set value in order to return to. The first means is a first pushing portion, and the first pushing portion is provided at a distance from the stopper and comes into contact with the stopper in order to deform the elastic member. The restraining device according to claim 1, which pushes the elastic member. The second means is a second pushing portion, and the second pushing portion is provided at a distance from the stopper and comes into contact with the stopper in order to deform the elastic member. The restraining device according to claim 1, which pushes the elastic member. The first means is a first push portion, the second means is a second push portion, and the first push portion is provided at a distance from the stopper. In order to deform the elastic member, the elastic member in contact with the stopper is pushed, and the second push portion is larger than the distance between the stopper and the first push portion between the stopper and the stopper. The restraining device according to claim 1, which is provided at intervals and pushes the elastic member in contact with the stopper in order to deform the elastic member. The restraining device according to claim 1, wherein a portion of the elastic member in contact with the stopper and a portion of the stopper in contact with the elastic member are curved surfaces. A holding member having a groove for holding the elastic member is provided, the first means is formed at the end of one wall surface of the groove, and the second means is formed at the end of the other wall surface of the groove. The restraining device according to claim 1. The restraining device according to claim 1, wherein the stopper and the first means are respectively arranged at two locations on the single elastic member. A rotary damper comprising the restraining device according to any one of claims 1 to 7. The rotary damper according to claim 8, which includes a rotor and whose magnitude of braking force changes depending on the rotation direction of the rotor. An armrest comprising the restraining device according to any one of claims 1 to 7. An armrest comprising the rotary damper according to claim 8 or 9.

Images