JP2564589Y2 - Friction damper - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a push-open type member which is always urged in an opening direction by an urging spring pressure, such as an ashtray for an automobile or an opening / closing lid of a home appliance. The present invention relates to an improvement in a friction damper used to apply a braking force to an opening speed at the time of opening.

[0002]

2. Description of the Related Art An example of such a conventional friction damper is disclosed in Japanese Utility Model Publication No. 57-49216. Although not specifically shown, the conventional friction damper includes a housing having a storage chamber, a rotor rotatably disposed in the storage chamber of the housing, and a gear fixed to a tip end of the rotor. And a plurality of J-shaped metal leaf springs whose base ends are fixed to the rotor, and the curved distal end surfaces of the leaf springs are arranged along the inner wall surface of the housing chamber of the housing. A configuration in which a sliding force can be applied to the opening speed of the push-open type member by utilizing the frictional resistance generated between the curved front end surface of each leaf spring material and the inner wall surface of the storage chamber by directly sliding. It has become.

Therefore, using a conventional friction damper,
Now, if a push-open type ashtray for an automobile is to be controlled, the housing of the damper is fixed to one of an ashtray case and a frame body that holds the ashtray case so that the ashtray case can appear and disappear,
If a rack is provided on the other side and the rack and the gear of the damper are engaged, the locked state of the ashtray case at the closed position is released, and the ashtray case moves in the opening direction by the biasing spring pressure. Is started, the gear rotates in accordance with the movement of the ashtray case.
As a result, frictional force is generated between the curved front end surface of each leaf spring material and the inner wall surface of the housing, thereby applying a braking force to the opening speed of the ashtray case. Thus, it is guaranteed that the ashtray case moves slowly in the opening direction.

[0004]

However, such a conventional friction damper has advantages such as being less susceptible to a temperature change and having no fear of oil leakage as compared with an oil damper. However, on the other hand, FIG.
As described above, in particular, since the static friction of the above-mentioned leaf spring material is larger than the dynamic friction, there is a problem that the braking resistance at the time of startup and at the time of steady state changes. For this reason, if the braking force for the push-open type member is set in accordance with the dynamic friction, there is a sufficient risk that the large opening torque due to the static friction will hinder the push-open type member such as an ashtray case from moving in the opening direction. Conversely, if the braking force is set in accordance with the static friction, the value of the dynamic friction becomes too small, and there is a sufficient risk that the braking force on the push-open type member will be insufficient.

[0005]

SUMMARY OF THE INVENTION The present invention has been developed in order to effectively solve the above-mentioned problems of the conventional friction damper, and has a housing having a storage chamber and a rotatable housing in the housing. The inner wall surface of the housing chamber of the housing is premised on a friction damper including a rotor to be disposed, a gear fixed to the tip of the rotor, and a leaf spring material that is fixed to the rotor and slides. While the stopper portion is formed, a ring-shaped collar body whose both ends are separated is disposed between the inner wall surface of the storage chamber and the leaf spring material so as to be rotatable forward and backward until the stopper portion is restricted. The outer peripheral surface of the leaf spring material is pressed against the inner peripheral surface of the ring-shaped collar body, and
A configuration is adopted in which a lubricant is interposed between the outer peripheral surface of the ring-shaped collar body and the inner wall surface of the storage chamber.

[0006]

According to the present invention, since the ring-shaped collar member is disposed between the inner wall surface of the storage chamber and the leaf spring material, the push-open type member moves in the opening direction by the biasing spring pressure. When the movement is to be started, the rotor also rotates in a predetermined direction together with the leaf spring material in conjunction with this, as in the past, but at this time, due to the action of the interposed lubricant, The ring-shaped collar body rotates first while maintaining the press-contact state of the leaf spring material to allow a smooth initial movement of the push-open type member in the opening direction. Then, when one end of the ring-shaped collar body abuts against the stopper and its movement is prevented, the rotor is rotated in substantially the same direction with the leaf spring material from the input from the gear. That is, at this time, even if a large starting torque due to static friction is acting between the inner peripheral surface of the collar body and the outer peripheral surface of the leaf spring material, the inertial force of the push-open type member that has already started initial movement. Since it is possible to rotate while overcoming this large torque, a steady braking force is then applied to the opening speed of the push-open type member by effectively utilizing the steady rotational torque due to dynamic friction. Becomes

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. As shown in FIG. 1, a friction damper according to the embodiment includes a housing 1 having a storage chamber 1a having an opening on one side. A cap 2 for closing the opening of the storage chamber 1a of the housing 1, a rotor 3 rotatably disposed in the storage chamber 1a of the housing 1, and a cap hole 2a of the rotor 3
A gear 4 fixed to a tip 3a protruding outward from the
A ring-shaped leaf spring member 5 whose one end 5a is fastened to a fastening groove 6 formed in the disk-shaped base 3b of the rotor 3; The configuration is such that a braking force can be applied to the opening speed of the push-open type member by positively utilizing the frictional resistance generated by sliding and rotating together.

In the present embodiment, in addition to the above configuration, as shown in the drawing, the storage chamber 1a of the housing 1 is provided.
One stopper projection 8 is integrally formed at an appropriate position on the inner wall surface, while a ring-shaped collar body 9 whose both ends are separated between the inner wall surface of the storage chamber 1a and the ring-shaped leaf spring material 5 is formed.
Is disposed so as to be able to rotate forward and backward until the stopper projection 8 is restricted, and the outer peripheral surface including the other end 5b of the ring-shaped leaf spring material 5 is pressed against the inner peripheral surface of the ring-shaped collar body 9. In addition to the configuration, a lubricant such as lubricating oil is interposed between the outer peripheral surface of the ring-shaped collar body 9 and the inner wall surface of the storage chamber 1a.

Therefore, in the friction damper of the present embodiment, as shown in FIG. 2, the ring-shaped collar body 9 is interposed in the housing chamber 1a of the housing 1 with the lubricant 10 interposed therebetween. While being stored along the inner wall surface, one end 5a of the ring-shaped leaf spring material 5 is fitted into the fixing groove 6 of the disc-shaped base 3b, and one end 5a of the leaf spring material 5 is placed on the rotor 3 side. When the rotor 3 is stored in the storage chamber 1a of the housing 1 together with the leaf spring material 5, the rotor 3 is supported by the support portion 7 protruding from the bottom surface of the storage chamber 1a. On the other hand, the ring-shaped leaf spring member 5 is slidably disposed in the storage chamber 1a with its outer peripheral surface pressed against the inner peripheral surface of the ring-shaped collar body 9. After that, the opening of the storage chamber 1a is closed with the cap 2 and the hole 2 of the cap 2 is The rotor 3 projecting outward from the
If the gear 4 is fixed to the tip 3a of the
The damper itself can be easily assembled. still,
In such a state, as shown in the figure, it is assumed that the stopper projection 8 is located between the separated both ends 9a and 9b of the ring-shaped collar body 9.

When this friction damper is applied to a push-open type ashtray for a vehicle, as in the prior art, the ashtray case and one of the frames holding the ashtray case so as to be able to protrude and retract are attached to the damper. What is necessary is to fix the housing 1 via its flange portion and provide a rack on the other side, and make the rack and the gear 4 engage with each other. In this case, when the ashtray case is opened, the rotor 2 is set to rotate in the X direction in FIG. 2 (the direction in which the entire leaf spring material 5 is enlarged), and when the ashtray case is pushed into the frame, the rotor 3 is rotated in the same Y direction (the leaf spring material 5). (To reduce the diameter of the whole).

In such a state, when the locked state at the closed position is released and the ashtray case starts to move in the opening direction by the biasing spring pressure, even in the present embodiment, The rotor 3 is also rotated in the X direction together with the ring-shaped leaf spring material 5 by the input from the gear 4 interlocked with this, but at this point, the lubrication of the lubricant 10 The collar body 9 first rotates in the same direction while maintaining the pressed state of the leaf spring material 5 to allow a smooth initial movement of the ashtray case in the opening direction. Then
As shown in FIG. 4, when one end 9 a of the ring-shaped collar body 9 comes into contact with the stopper projection 8 and its rotation is stopped, the rotor 3 is turned into the ring-shaped plate by the input from the gear 4. Although it will rotate substantially with the spring material 5,
At this time, even if a large starting torque due to static friction is acting between the inner peripheral surface of the collar body 9 and the outer peripheral surface of the leaf spring material 5, the inertia force of the ashtray case that has already started initial movement causes the large starting torque to reach this large starting torque. After that, it is possible to overcome the problem and rotate smoothly, and thereafter, a steady and stable rotational torque due to dynamic friction is effectively used to apply a reliable and stable braking force to the opening speed of the push-open type member. It is.

When the opened ashtray case is to be pushed into the frame, the pushing force causes the rotor 3 to rotate in the Y direction together with the ring-shaped leaf spring material 5. However, also in this case, the ring-shaped collar body 9 first rotates until the other end portion 9b of the ring-shaped collar body 9 comes into contact with the stopper projection 8, and the state shown in FIG. The rotor 3 rotates substantially in the Y direction with the ring-shaped leaf spring member 5. In addition, at this time, the ring-shaped leaf spring material 5 moves along the inner peripheral surface of the collar body 9 in a state as if the entire diameter was reduced while bringing the one end 5a of the ring-shaped leaf spring 5 closer to the other end 5b. As a result, the frictional resistance between the outer peripheral surface of the leaf spring material 5 and the inner peripheral surface of the collar body 9 is reduced, so that the ashtray case can be smoothly pushed into the frame with a small force. It becomes possible.

In the above embodiment, it is needless to say that stable speed control of a push-open type member such as an ashtray case can be performed with the above-described configuration. A viscous oil layer such as silicone oil may be separately provided between the outer peripheral surface of the spring member 5 and the inner peripheral surface of the ring-shaped collar body 9 so as to assist the viscous oil layer in assisting the braking operation. It is optional depending on the implementation.

[0014]

As described above, according to the present invention, by adopting the above-described structure, it is possible to effectively use a steady rotational torque due to dynamic friction as a braking force without being affected by a large starting torque due to static friction. Therefore, even if the braking force is set in accordance with the kinetic friction, not only will there be no danger that the push-open type member such as the ashtray case will not be able to move in the opening direction, but also stable and reliable speed braking will always be achieved. You can be guaranteed. In addition, in the present invention, the number of parts increases by the amount of the ring-shaped collar body as compared with the conventional one, but the presence of the ring-shaped collar body, in addition to the above-described effects, There is an advantage that rattling during operation of the damper can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a friction damper according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state where a ring-shaped collar body, a rotor, and a ring-shaped leaf spring material are arranged in a storage chamber of a housing.

FIG. 3 is a longitudinal sectional view showing a state where the damper is finally assembled.

FIG. 4 is a plan view showing a state where the ring-shaped collar body is rotated in the X direction.

FIG. 5 is a table showing values of static friction and dynamic friction in a leaf spring material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Storage room 3 Rotor 3a Tip part 4 Gear 5 Ring-shaped leaf spring material 5a Same end 8 Stopper protrusion (stopper part) 9 Ring-shaped collar body 10 Lubricant

Claims (1)

(57) [Scope of request for utility model registration] 1. A housing having a storage chamber, a rotor rotatably disposed in the storage chamber of the housing, a gear fixed to a tip end of the rotor, and a slide fixed to the rotor. A damper having a leaf spring material, wherein a stopper portion is formed on the inner wall surface of the storage chamber of the housing, and a ring-like shape in which both ends are separated between the inner wall surface of the storage chamber and the leaf spring material. The collar body is disposed so as to be able to rotate forward and backward until it is restricted by the stopper portion, the outer peripheral surface of the leaf spring material is pressed against the inner peripheral surface of the ring-shaped collar body, and the outer periphery of the ring-shaped collar body A friction damper characterized in that a lubricant is interposed between the surface and the inner wall surface of the storage chamber.