JPH10292723A - Soft closing damper mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change damper force properly at an appropriate time by forming a variable clearance communicated with a damper chamber by a notched opening section formed to the bearing section of a movable shaft, flowing a viscous fluid in the damper chamber into a notched rotary section by turning the movable shaft and closing the variable clearance when the movable shaft is revolved at an angle larger than the fixed angle of rotation. SOLUTION: Notched opening sections 9, 10 are formed to the bearing section 2g of a movable shaft 2 so as to be communicated with partition chambers 8a, 8b respectively between the maximum angle of rotation of the movable shaft 2 to a fixed angle, and variable clearances (b), (c) with the revolution of the movable shaft are formed. When the damper mechanism is applied to a toilet seat, a viscous fluid (a) in the partition chamber 8a, 8b divided into two by the projecting section 1f of a casing 1 and a movable valve 6 is flowed out into the variable clearances (b), (c) when the toilet seat is closed from an open place. When the closet seat is moved towards a horizontal state by closing operation, the variable clearances (b), (c) are closed by the bearing section 2g, the viscous fluid (a) in the notched opening sections 9, 10 fills the partition chambers 8a, 8b, and the damper mechanism can be closed softly by large damper force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a high-molecular viscous fluid such as polyisobutine, other viscous fluids and a spring, and obtains a resistance using a viscous shear resistance and a spring force, respectively. When the door or the like is turned in one direction by a resistance force, the spring exerts a buffering action against a load torque by the door or the like, that is, exerts a braking force. The present invention relates to a damper mechanism that can be used in various applications in which the door or the like can be rotated with a light force by an effect.

[0002]

2. Description of the Related Art Conventionally, in a soft closing damper mechanism of this kind, a structure of a damper chamber includes a casing,
It comprises a movable shaft fitted and disposed rotatably in the casing, and a bearing for rotatably supporting the movable shaft in the casing.

That is, in the above-mentioned conventional soft closing damper mechanism, the movable shaft is disposed at one end in the axial direction in the casing and through a small-diameter shaft hole penetrating through the center of the end wall because of assembling the components. A small-diameter portion formed on one end side is liquid-tightly fitted via an O-ring so as to be rotatable.
The movable shaft is fitted and disposed on the outer peripheral wall of the large diameter portion or the inner wall surface of the casing so as to open and close the movable valve. Further, after filling the viscous fluid into each of the compartments in which the inside of the casing is divided into two in the circumferential direction by the movable valve, a lid is liquid-tightly attached to the opening at the other end in the axial direction of the casing. The bearing is fixed in a state, and a bearing is fitted and fixed in a liquid-tight state in a shaft hole penetrating through the lid, and the other end of the movable shaft is rotatably supported on the bearing.

[0004]

However, since the movable shaft and the bearing are formed as separate members as described above, there are disadvantages that the number of components increases and the assembly takes time, which is solved. For this reason, it is naturally conceivable to integrate the movable shaft and the bearing in order to simplify the structure.However, if an attempt is made to adopt such an integrated configuration, the injection of the viscous fluid into the damper chamber is required during assembly. I can no longer do it.

In view of the above-mentioned problems of the conventional soft closing damper mechanism, the present invention can inject a viscous fluid into the damper chamber during assembly even when the movable shaft and the bearing are integrated. The soft closing damper mechanism, in which the damper force is in the middle of rotation and can be changed appropriately in a timely manner, can be provided with a simple configuration.
That is the purpose.

[0006]

According to the present invention, in order to achieve the above-mentioned object, a casing and a bearing portion are provided so as to protrude therearound, and a pair of blade portions are symmetrically arranged adjacent to the bearing portion in the axial direction. A movable shaft having a substantially cylindrical shape, which is protruded at a position, and which is fitted and disposed so as to be rotatable within the casing, and whose outer peripheral wall surface is slid by the relative rotation of the movable shaft with respect to the casing. A movable valve and a protruding portion, or a pair of movable valves or a pair of protruding portions, which are arranged so as to be movable in a closed state and an open state, respectively, at opposing positions on the inner peripheral wall surface of the casing as much as possible. Part, a damper chamber formed between the casing and the outer peripheral wall of the movable shaft by the movable valve and the projecting portion, and a viscous fluid filled and sealed in two compartments partitioned in the circumferential direction; In the movable shaft, A spring disposed in a state where each end is hooked on the side and the movable shaft side, and a notch opening communicating with the compartment is provided in a bearing portion of the movable shaft. By providing and closing the outflow of the viscous fluid, the relative rotation of the movable shaft in the damper chamber causes a variable gap that allows the communication between the compartments and the cutout openings to be freely opened and closed. It is intended to provide a soft closing damper mechanism characterized in that it is formed.

The present invention intends to exert the following effects by the above-described configuration. That is, when the external force is applied as a rotating force to the movable shaft, the movable shaft is rotated. When the movable shaft is rotated in one direction, the movable shaft is out of the damper chamber filled with the viscous fluid. , By the pressing force on the viscous fluid in one compartment,
In the case of the projecting portion, it is of course immovable and closed, but when the movable valve is adopted, it is pushed and moved inward, thereby contacting the outer peripheral wall surface of the movable shaft. The movable valve is closed. In any case, however, the viscous fluid in the two compartments is notched or opened in the bearing of the movable shaft until the movable shaft is rotated by a predetermined angle from its maximum rotation angle. Respectively, and the viscous fluid in the two compartments flows into the variable gap formed in the damper chamber through the two cutout openings. Within the predetermined rotation angle range of the opened movable shaft, a large damper effect is not exerted against a rotation external force applied to the movable shaft.

That is, when the flap door is mounted so as to be at a horizontal closed position at 0 ° and an open position at 120 °, the maximum angle of rotation of the movable shaft is from 120 ° to 90 ° at which the movable shaft becomes upright. Since the damper force is set to a small value up to the rotation angle as described above, the door closing operation can be performed by a light manual force.

Further, when the door is rotated from 90 ° to 60 °, the notch opening provided in the bearing portion of the movable shaft gradually rotates and shifts in the circumferential direction with respect to the two compartments, and By the rotation of the shaft, the variable gap communicating with each of the compartments of the damper chamber is closed before the pivot angle of the door becomes 60 °, whereby the variable fluid into which the viscous fluid of each of the compartments has flowed in is closed. Since the gap is gradually reduced to an absent state, the viscous fluid in each compartment becomes full due to the rotational displacement of the movable shaft by the two blades, and a large resistance force based on the viscous fluid is generated. Thus, a sufficient damper effect is exerted against the external force of the movable shaft. Therefore, the door receives a necessary damper force in the rotation angle range from 60 ° to 0 °, and the door or the like can be softly closed.

Further, when the door is turned in the closing direction as described above, the spring is screwed in the winding direction, and this screwing resistance acts on the movable shaft. The restoring force of the spring facilitates the door opening operation, and when the movable valve is adopted when the door is closed or the like, the movable valve is opened. The fluid easily flows into the other compartment, and the damping force becomes smaller, so that the door opening operation or the like can be easily performed.

Further, when assembling the soft closing damper mechanism, when a movable valve is used on the inner peripheral wall surface of the casing, the movable shaft is mounted in a state where the movable valve is mounted in advance.
It is inserted into the casing from the small diameter side of the tip, and an O-ring is inserted into a shaft hole penetrating the tip wall of the casing.
The small diameter portion is inserted so as to be rotatable in a liquid-tight state.
Then, by the relative rotation of the movable shaft with respect to the casing, the compartments and the notch openings provided in the bearing portion of the movable shaft are respectively set to the 120 ° state of the door or the like described above, so that the variable gap can be reduced. In this state, the viscous fluid can be injected into each of the compartments from the rear end opening side of the casing through each of the variable gaps in this state.

After the injection of the viscous fluid, the two cutout openings are brought into a liquid-tight state from the rear by means such as press-fitting an O-ring between the rear outer peripheral surface of the bearing portion of the movable shaft and the inner peripheral wall surface of the casing. If the spring is inserted into the movable shaft after closing, the spring receiver is fitted from the rear end in the casing, and the cover nut is screwed on to fix the spring receiver to complete the assembling operation. Of course, each end of the spring has a movable shaft and a spring receiver,
Each of them is arranged in a hung state.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view in vertical section, and FIGS. FIG. 7 is an exploded perspective view of the state shown in FIG.
, 1 is a casing, 2 is a movable shaft, 3 is a spring, 4 is a spring receiver, and 5 is a cover nut.

The casing 1 has a substantially horizontally long cylindrical shape.
A shaft hole 1b is provided at the center of the tip wall 1a.
The diameter of the cover nut 5 is smaller than the inner diameter of the cover nut 5 and is provided in the axial direction.
Is screwed into the female screw portion 1c.

Further, at the front end of the inner peripheral wall 1d of the casing 1, in the case of the embodiment shown in FIG.
-Shaped shaft-mounted valve seat 1e and outer peripheral wall surface 2f of movable shaft 2
Is slidably contacted with the projecting portion 1f, and is protruded in the axial direction by a required length in the facing position.
A separately prepared pin-shaped movable valve 6 is fitted so as to be movable in the diameter direction. In the above embodiment, the movable valve 6 and the protruding portion 1f are opposed to each other as a pair. However, at this time, the movable valve 6 may be provided to oppose without providing the protruding portion 1f if necessary. Also, without using the movable valve 6, the projecting portion 1
f may be provided opposite to each other. Of course, when the movable valve 6 is adopted, the resistance force in the rotation direction of the movable shaft is smaller than when the protruding portion 1f is adopted. Become.

The movable shaft 2 has a small-diameter portion 2a at the front end and a bearing portion 2 having a diameter slightly larger than the small-diameter portion 2a on the rear side.
b is provided continuously, and a large-diameter portion 2c is provided on the rear side. The large-diameter portion 2c is located symmetrically with respect to the outer peripheral wall surface 2f of the large-diameter portion 2c, Two wing portions 2d and 2e which can be slidably contact with each other are protruded.

The movable shaft 2 has an outer peripheral wall surface 2.
f, a bearing portion 2g projecting outward from the rear side and slidingly contacting the inner peripheral wall surface 1d of the casing 1 is provided with the blade portions 2d, 2d.
e is continuously and integrally provided from the rear end.

As shown in FIG. 1, the movable shaft 2 having the above-mentioned structure is first fitted with an O-ring 7 into an annular recess 2h recessed on the outer periphery of the support portion 2b. Inserting from the rear end opening toward the inside of the casing 1 from the side, and then the bearing 2b is fitted into the shaft hole 1b so as to be rotatable in a liquid-tight state. By doing so, the inner peripheral wall surface 1d of the casing 1, the outer peripheral wall surface 2f of the movable shaft 2 and the bearing portion 2g allow the movable valve 6 and the projecting portion 1f or the relative position as described above. The damper chamber 8 divided into two compartments 8a and 8b in the circumferential direction by a pair of movable valves 6 provided facing each other or a pair of projecting portions is formed, and in the compartments 8a and 8b. The blades 2d and 2e projecting from the outer peripheral wall 2f are
The casing 1 is disposed so as to be rotatable in the circumferential direction while being in contact with the inner peripheral wall surface 1d.

Further, in the illustrated example, the movable shaft 2 is
Between the maximum rotation angle 120 ° shown in FIG. 3 and the rotation angle 90 ° shown in FIG. 3 so as to maintain communication with the compartments 8a and 8b, respectively.
g has notched openings 9 and 1 so that the viscous fluid a can be injected into the compartments 8a and 8b during assembly.
0 is not provided, so that the compartments 8a, 8b
As described in detail later, variable gaps b and c for adjusting the damper force in accordance with the fluctuation of the rotation angle are connected in series.

At the time of the assembling, after the viscous fluid a is injected into the compartments 8a and 8b from the notch openings 9 and 10 as described above, as shown in FIG.
An O-ring 11 is press-fitted between the rear portion of the bearing portion 2g and the inner peripheral wall surface 1d of the casing 1, and a spring 3 is inserted into the movable shaft 2 so that one end 3
a is hooked on the movable shaft 2, and then, with the other end 3 b of the spring 3 hooked on the rear portion inside the casing 1, the spring receiver 4 is fitted. , And the spring receiver 4 is fixed in the casing 1 to complete the assembly.

FIG. 8 shows a state in which the soft closing damper mechanism according to the present invention is used for the toilet seat 12, the casing 1 of which is fixed to the toilet body 13, and the movable shaft 2 is connected to the toilet seat 1.
The toilet seat 12 is pivotally attached to the toilet body 13 so as to be openable and closable by fixing to the base end of the toilet seat 2.

The toilet seat 12 thus attached to the toilet body 13 is moved to the closed position shown in FIG.
By opening upward from the E position which is °,
The movable shaft 2 is rotated in the direction of arrow d from the position shown in FIG. 6 with respect to the casing 1 fixed to the toilet body 13.
In other words, in FIG. 8, since the movable valve 6 is sequentially rotated from the position E to the positions d, c, and b, the movable valve 6 fluctuates from the position shown in the lower right direction to the valve opening operation state. The viscous fluid a in the chamber 8a quickly flows into the compartment 8b, so that no damper force acts on the viscous fluid a.
Can be opened by the restoring force of the spring 3 until the illustrated maximum rotation angle, that is, the opening a position is reached. However, from the position C of FIG. 8 shown in FIG.
The variable gaps b and c which are in communication with the compartments 8a and 8b are gradually expanded, and at an opening angle of 90 °, the variable gaps b and c are opened considerably as shown in FIG. In the opening position a, the maximum opening state is achieved. Therefore, the toilet seat 12 can be rotated with a lighter force than before until the toilet seat 12 reaches the position A after the lower position.

Next, when the toilet seat 12 is in the open position of the toilet seat 12 and a force is applied to the toilet seat 12 in the closing direction, as described above, the position from the illustrated position A to the position B is shown in FIGS.
As shown in the figure, the variable gaps b and c are open, and the variable gaps b and c are closed in the middle of the position B and the position C. Therefore, the variable gaps b and c are closed in the middle of the position A to the position B and the position C. Until the viscous fluid a in the compartments 8a, 8b
Therefore, the damper force acts weakly.

From the position immediately before the position C to the positions D and E, as shown in FIGS. 4, 5 and 6, the variable gap b,
Since c is completely closed, the damper force has the maximum strength, and the valve seat 12 slowly closes from the position before the position C to the position E in FIG. 8 to realize the soft closing operation.

[0025]

Since the present invention is constructed as described above, a variable gap communicating with the damper chamber is formed in the movable shaft by the notch opening formed in the bearing portion of the movable shaft. The gap is open until the movable shaft is rotated by a predetermined rotation angle from its maximum rotation angle, so that the viscous fluid in the damper chamber flows into the notch rotation portion by the rotation of the movable shaft. Since the variable gap is closed by being rotated by a predetermined rotation angle or more, there is no storage of viscous fluid,
A region where the damper force is weak is set near the maximum rotation angle of the movable shaft, and a region where the damper force is strong is set in the other rotation angle range. Since the variable gap is gradually closed as the shaft rotates, a damper force adjusting function equivalent to a conventional orifice is obtained, and therefore, the soft closing damper mechanism according to the present invention is used for, for example, a flap door or the like. Then, the initial door closing operation can be performed lightly, and thereafter the door can be slowly closed by the load torque of the door.

Further, in the state where the gap is open, the notch opening of the bearing portion can be used as an inlet for the viscous fluid into the damper chamber, and the movable shaft and the bearing portion are integrally formed. The need for separate bearings and other components for assembling the bearings is eliminated, making it possible to provide a simple and inexpensive provision.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of a soft closing damper mechanism according to the present invention.

FIG. 2 is a cross-sectional view showing an operation state at 120 ° which is the maximum rotation angle of the movable shaft as viewed in the direction of arrows AA in FIG.

FIG. 3 shows a movable shaft rotation angle 9 at the same cutting position as in FIG.
It is the cross-sectional view which showed the operation state in 0 degree.

FIG. 4 is a movable shaft rotation angle 6 at the same cutting position as in FIG.
It is the cross-sectional view which showed the operation state of 0 degree.

FIG. 5 shows a movable shaft rotation angle 3 at the same cutting position as in FIG.
It is the cross-sectional view which showed the operation state of 0 degree.

6 is a movable shaft rotation angle 0 at the same cutting position as in FIG.
FIG. 6 is a transverse cross-sectional view showing an operating state of °.

FIG. 7 is an exploded perspective view showing the soft closing damper mechanism of the embodiment.

FIG. 8 is an explanatory side view showing one usage example of the soft closing damper mechanism according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 casing 1d inner peripheral wall surface 1f protruding portion 2 movable shaft 2d blade portion 2e blade portion 2f outer peripheral wall surface 2g bearing portion 3 spring 3a end of spring 3b end of spring 6 movable valve 8 damper room 8a compartment 8b compartment 9 Notch opening 10 Notch opening a Viscous fluid b Variable gap c Variable gap

Continuing from the front page (72) Inventor Shingo Seki 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Inside Totoki Equipment Co., Ltd. (72) Inventor Yojiro Nakayama 1-81-11, Higashikanda, Chiyoda-ku, Tokyo (72) Inventor Ryosuke Bando 1-8-11 Higashikanda, Chiyoda-ku, Tokyo

Claims (1)

[Claims] 1. A casing and a bearing portion are provided so as to protrude around the bearing portion, and a pair of blade portions are protruded at symmetrical positions adjacent to the bearing portion in the axial direction, and are rotatable into the casing. A movable shaft having a substantially cylindrical shape fitted and disposed in such a manner that the movable shaft is rotated relative to the casing so that an outer peripheral wall thereof is slidable at an opposing position on an inner peripheral wall surface of the casing. A movable valve and a projecting portion, or a pair of movable valves or a pair of projecting portions, which are disposed so as to be movable in a closed state and a valve opening state, and a casing and a movable shaft are formed by these movable valves and projecting portions. A damper chamber formed between the outer peripheral wall surface and the viscous fluid filled and sealed in the two partition chambers partitioned in the circumferential direction, and the viscous fluid in the movable shaft, the casing side and the movable shaft side Arranged with each end hooked The movable shaft is provided with a notch opening communicating with the compartment, and closing the outflow of the viscous fluid, whereby the movable shaft is provided in the damper chamber. A soft closing damper mechanism, characterized in that a variable clearance is formed by the relative rotation so that the communication between each of the compartments and the cutout opening can be freely opened and closed.