JP2002155925A - Rotary movement support mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability and to reduce generated noise at clicking. SOLUTION: This rotary movement support mechanism has a click mechanism part 30 provided with a magnet part 31 fixed in a main body case 10, and a magnetic body part 32 provided so as to rotate with a rotary shaft 20 in the main body case 10 and attracted to the magnet part 31 when the rotary shaft 20 rotates a predetermined angle in one direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation supporting mechanism for rotatably supporting an object to be controlled.

[0002]

2. Description of the Related Art Conventionally, a control object connected to a rotating shaft,
For example, the door, the lid of the piano keyboard, the toilet seat or toilet lid of a Western-style toilet, when the rotation axis reaches a predetermined rotation angle, the object to be controlled is held open at that position. A rotary motion support mechanism having a built-in mechanism is used. As such a click mechanism, for example, a concave portion is provided on an inner surface of a main body case fixed to a main body portion supporting the above-mentioned control target, and a convex portion engaging with the concave portion is protruded at an appropriate position on the rotating shaft. Or a mechanical structure by a cam system in which a steel ball or the like urged by a spring is disposed at a predetermined position and the rotating shaft is held at a predetermined rotation angle when both are engaged. ing.

[0003]

However, since the above-mentioned click mechanism is only mechanically engaged in any case, the concave and convex portions which engage with each other are worn due to use. There was a problem in terms of gender. Further, when trying to maintain a high holding force at the time of clicking, a cam having a deeper concave portion, a higher convex portion, and the like must be employed, and there has been a problem that the noise generated at the time of clicking increases. Further, when the cam is deformed due to abrasion or the like, abnormal noise may be generated at the time of engagement.
There is also a structure in which the leaf spring spreads and clicks when a predetermined angle is reached by using the reaction force of the leaf spring. In this case, the holding force at the time of clicking should be increased. Then, it is necessary to use a leaf spring having a larger reaction force, and in that case, there is a problem that workability at the time of assembly is poor.

On the other hand, conventionally, a position detecting mechanism has been used to detect a position at a point in time when an object to be controlled is temporarily held open at a certain angle by a rotary operation supporting mechanism. However, since the rotation support mechanism and the position detection mechanism are configured independently of each other, a space for disposing both mechanisms is required, and
The structure around the control object is complicated.

The present invention has been made in view of the above points, has excellent durability, can reduce the sound generated at the time of clicking, and can easily adjust the holding force at the time of clicking. It is an object of the present invention to provide a rotary operation support mechanism having a click mechanism that does not adversely affect workability during assembly even when a mechanism having a large holding force is employed. It is another object of the present invention to provide a rotary operation support mechanism that is small in size and simple in structure and has a position detecting function.
It is another object of the present invention to provide a rotation operation support mechanism capable of delaying the rotation operation of the control target.

[0006]

According to a first aspect of the present invention, there is provided a rotating shaft to which at least a part is inserted and supported in a main body case and to which an object to be controlled is connected. And a click mechanism for stopping the rotation of the rotation shaft at a predetermined rotation angle, wherein the click mechanism is fixed in the main body case in the rotation operation support mechanism for rotatably supporting the control target. And a magnetic body portion rotatably provided with the rotating shaft in the main body case, and a magnetic body portion attracted to the magnet portion when the rotating shaft rotates at a predetermined angle in one direction. I will provide a. According to a second aspect of the present invention, the magnet portion constituting the click mechanism portion includes a permanent magnet, and a pair of yokes disposed to face each other with the permanent magnet interposed therebetween. Protruding toward the axis, the tip end surface is supported by a partition formed so as to be in sliding contact with the outer peripheral surface of the rotating shaft, and in the partition,
2. The rotation operation support mechanism according to claim 1, further comprising a magnetic detection element for detecting a magnetic field between the pair of yokes when the magnetic body is attracted to the magnet. According to a third aspect of the present invention, there is provided the rotary operation support mechanism according to the first or second aspect, wherein a viscous liquid is filled between the main body case and the rotating shaft. The invention according to claim 4 is characterized in that the resistance of the viscous liquid is
The rotation operation support mechanism according to claim 3, wherein a predetermined braking force can be exerted only when the magnetic body rotates in a direction away from the magnet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. 1 and 2
FIG. 1 is a cross-sectional view illustrating a rotation operation support mechanism according to an embodiment of the present invention. As shown in these drawings, the rotation support mechanism according to the present embodiment includes a main body case 10, a rotation shaft 20, a click mechanism 30, a magnetic detection element 40, and a closing member 50.

The main body case 10 includes a main body for supporting the object to be controlled, for example, an entrance frame if the object to be controlled is an entrance door,
In the case of a toilet seat or a toilet lid of a Western-style toilet, it is fixedly disposed on a toilet body or the like using screws (not shown) or the like. Body case 1
Numeral 0 is formed in a substantially cylindrical shape with a bottom, and a partition 11 protruding from the inner peripheral surface in the axial direction is provided inside the cylindrical portion. The distal end surface 11a of the partition wall portion 11 is formed into a curved surface such that when the rotating shaft 2 described later rotates, the outer peripheral surface thereof comes into sliding contact. Also, one side surface 11 of the partition 11
b, a first groove 11d engraved in the direction of the other side surface 11c along the front end surface 11a, and a predetermined interval between the first groove 11d and the inner periphery of the main body case 1 Second groove 11e engraved in the direction of the other side surface 11c along the surface
Is provided.

[0009] At least a part of the rotating shaft 20 is inserted into the main body case 10, and a protruding portion 21 protruding outside the main body case 10 is connected to a control object (not shown). The rotating shaft 20 has an end 22 of a portion inserted into the main body case 10 fitted into a concave portion 12 a formed on the inner surface of the bottom wall 12 of the main body case 10. The formed shaft insertion holes 51a, 5
By being disposed so as to protrude out of the main body case 10 through the 2a, it is supported along the axis of the main body case 10. By arranging the rotating shaft 20 in the main body case 10 in this way, a space 60 is formed between the rotary shaft 20 and the main body case 10.

The click mechanism 30 is connected to the space 6 described above.
And a magnet section 31 and a magnetic body section 32 housed in the housing. The magnet unit 31 includes a permanent magnet 311
And a pair of yokes 312, 313, which are disposed to face each other with the permanent magnet 311 interposed therebetween, and are supported by the partition 11 provided in the main body case 1. Specifically, the permanent magnet 311 is formed in a substantially fan-shaped cross section, and is fixed to one side surface 11b of the partition wall portion 11 using an adhesive or the like.
The pair of yokes 312 and 313 are both made of a magnetic material. One of the yokes 312 is formed to have a substantially arc-shaped cross section, and the inner surface is in sliding contact with the outer peripheral surface of the rotating shaft 20 and the outer surface is in close contact with the permanent magnet 311. At the same time, one end 312a side is fixed in the first groove 11d of the partition wall portion 11 using an adhesive or the like. The other yoke 313 is connected to one yoke 312
The inner surface is in close contact with the permanent magnet 311, the outer surface is in close contact with the inner peripheral surface of the main body case 10, and one end 313 a side of the partition portion 11 is formed. It is fixed in the second groove 11e using an adhesive or the like. In the present embodiment, the pair of yokes 31
2 and 313 are the other end 312b and 313b of the permanent magnet 31.
It is arranged so as to protrude from the side surface of the first. By disposing the pair of yokes 312 and 313 in this way, it is possible to prevent the permanent magnet 311 from directly contacting the magnetic body portion 32 described below and being damaged.

In the present embodiment, the magnetic body portion 32 is formed integrally with the rotating shaft 20, and is provided in the main body case 10 so as to be rotatable together with the rotating shaft 20. In particular,
The length of the rotation shaft 20 in the protruding direction from the outer peripheral surface is
Has a length substantially the same as the radial length from the outer peripheral surface of the main body case 10 to the inner peripheral surface of the main body case 10, and the length along the rotating shaft 20 is closed from the inner surface of the bottom wall 12 of the main body case 10 to be described later. It is formed in a plate shape having substantially the same length as the length up to the bottom surface of the member 50 (the bottom surface of the spacer 52). In addition,
The material of the magnetic body portion 32 is not limited to iron as long as it is a magnetic material. Further, since the magnetic portion 32 is disposed in the space 60 in the main body case 10 as described above, the space 60 is formed by the pressure chamber 61 and the non-pressure chamber 62 partitioned by the magnetic portion 32. Divided into two rooms,
These chambers 61 and 62 are each filled with a viscous liquid such as silicone oil.

The magnetic sensing element 40 includes a pair of yokes 31 when the magnetic portion 32 is attracted to the magnet portion 31 in the partition portion 11 provided in the main body case 10.
It is provided at a position at which a magnetic field between 2,313 can be detected. More specifically, the pair of yokes 312, 313 supported by the partition 11 are provided at substantially intermediate positions between the respective ends 312 a, 313 a of the yokes 312, 313. Although the magnetic sensing element 40 is not limited, a Hall element is used in the present embodiment.

The closing member 50 includes a rotating shaft 20 and a click mechanism 30 in a main body case 10 filled with a viscous liquid.
Are stored in the main body case 10 to hold them in the main body case 10. Closing member 5
0 is the cap 51 and the cap 5 in the present embodiment.
1 is composed of a spacer 52 disposed inside. The cap 51 and the spacer 52 are provided with the rotation shaft 20 respectively.
Are formed, and a sealing member 70 for preventing leakage of viscous liquid is provided at a predetermined portion of the cap 51. Further, in the present embodiment, as shown in FIGS. 1 and 3, an orifice groove 52 b formed in a substantially arc shape is provided on the bottom surface of the spacer 52. The rotary operation support mechanism according to the present embodiment can exert a predetermined braking force by resistance generated when the viscous liquid passes through the orifice groove 52b.

As shown in FIG. 3, the width of the orifice groove 52b is formed such that the width of the orifice groove 52b gradually decreases in the direction in which the magnetic body portion 32 is separated from the magnet portion 31 (counterclockwise in the drawing). For example, as the magnetic body part 32 rotates in a direction away from the magnet part 31, a greater braking force can be exerted. Further, in the present embodiment, the orifice groove 52b is provided on the bottom surface of the spacer 52, but the formation location is not limited. For example, the orifice groove 52b may be formed on the inner surface of the bottom wall 12 of the main body case 10. Further, the viscous liquid is moved through a small gap formed between the magnetic body portion 32 and the main body case 10 and / or the closing member 50 without forming a special orifice groove, and the resistance generated at that time causes the viscous liquid to move in both directions. It is also possible to cause the braking force to be exerted.

Next, the operation of the rotary operation support mechanism according to this embodiment will be described. This rotation operation support mechanism is, for example,
In the case of a Western-style toilet, a main body case 10
Is fixed, and the projection 21 of the rotating shaft 20 is used by being connected to the toilet seat that is an object to be controlled. In a state in which the toilet seat is closed, the magnetic body portion 32 is at a position separated from the magnet portion 31 by a certain distance.

When the toilet seat is opened from this state, the rotating shaft 20 rotates in one direction. Magnetic part 32
Is provided so as to be rotatable together with the rotating shaft 20,
When the rotation shaft 20 rotates in one direction, the front end surface 32 a slides on the inner peripheral surface of the main body case 10, the upper surface 32 b moves on the bottom surface of the spacer 52, and the lower surface 32 c moves on the inner surface of the bottom wall 12 of the main body case 10. Magnet part 31
Rotate in the direction close to. At this time, the viscous liquid filled in the non-pressure chamber 62 is pressed by the magnetic body portion 32 and moves to the pressure chamber 61 through the orifice groove 52b formed in the spacer 52.
b is formed so that the width thereof gradually increases in the non-braking force exerting direction, that is, in the direction in which the magnetic body portion 32 approaches the magnet portion 31, so that the viscous liquid passes through the orifice groove 52b. Hardly causes any resistance. Therefore, the rotating shaft 20 and the magnetic body 32
Rotates with almost no resistance from viscous liquid.

When the toilet seat is further opened and opened at a predetermined angle, for example, 100 degrees, the magnetic part 32 approaches the magnet part 31 and is attracted to the magnet part 31 by the magnetic force of the permanent magnet 311. In this state, when the user releases his or her hand to open the toilet seat, the toilet seat tends to fall forward due to its own weight.
1, that is, in this case, the opening angle 1
Stops at 00 degrees and is held. Thereby, the toilet seat can be made independent at a desired angle.

When the toilet seat is closed, an external force is applied in the closing direction to such an extent that the magnetic part 32 is separated from the magnet part 31. After that, the toilet seat is closed by its own weight,
Since 0 rotates in the opposite direction to the opening, the magnetic body portion 32 rotates in the direction away from the magnet portion 31 in the main body case 10. At this time, the viscous liquid filled in the pressure chamber 61 is pressed by the magnetic body portion 32 and moves to the non-pressure chamber 62 through the orifice groove 52b formed in the spacer 52. The orifice groove 52b moves in a direction in which the magnetic body portion 32 is separated from the magnet portion 31.
Because it is formed so that its width becomes gradually smaller,
Resistance occurs when the viscous liquid passes through the orifice groove 52b. Therefore, the rotating shaft 20 and the magnetic body part 32 receive the resistance of the viscous liquid and the rotation speed is reduced, whereby the rotation of the toilet seat can be delayed, and the toilet seat does not collide violently with the toilet body. Close quietly.

When it is desired to change the holding force at the time of clicking (at the time of attraction between the magnet part 31 and the magnetic part 32) according to the control object, it is only necessary to use a permanent magnet 311 having a different magnetic force. Therefore, the adjustment of the holding force is easy, and the assembling does not become difficult because the holding force is increased.

Further, the rotating operation support mechanism according to the present embodiment includes a magnetic detecting element 40 for detecting a magnetic field between the pair of yokes 312 and 313 when the magnetic body 32 is attracted to the magnet 31. Since it is provided, the rotational position of the control target can be detected. That is,
In the above usage example, a heater for heating is built in the toilet seat, and the element 40 for magnetic detection is connected to the heater via a conducting wire 40a. When the toilet seat is in the closed state, since the magnetic body portion 32 is located at a position separated from the magnet portion 31, the magnetic flux density between the pair of yokes 312 and 313 is small, and the magnetic sensing element 40 does not react. . Thus, when the magnetic sensing element 40 does not react, the heater is set to be energized.

On the other hand, when the toilet seat is opened and the magnetic portion 32 is attracted to the magnet portion 31, the pair of yokes 312, 3
13, the magnetic flux density between the one ends 312a and 313a becomes large, the strength of the magnetic field becomes more than a predetermined value, and the magnetic sensing element 40 detects that the magnetic flux density has changed. Thus, it is possible to detect that the toilet seat is at the fully open position, and when the toilet seat is in the open state, the power supply circuit of the heater can be cut off and turned off. When the toilet seat is closed again, the magnetic member 32 separates from the magnet 31 and returns to the initial position.
Does not detect the magnetic field, and the heater is energized.

[0022]

According to the present invention, since the attraction force of the magnet portion is used as the click mechanism portion, the click mechanism portion is compared with a conventional mechanical click mechanism only by meshing.
In addition to being excellent in durability, the sound generated upon clicking can be reduced. In addition, when the holding force at the time of clicking is adjusted, it is only necessary to change the permanent magnet constituting the magnet portion to one having a different magnetic force, and the adjustment is easy.
Moreover, since only permanent magnets are replaced, the use of a magnet having a large holding force does not adversely affect the workability during assembly. Further, it is possible to provide a rotary operation support mechanism which is small in size and simple in structure and has a position detecting function. Further, it is possible to provide a rotation operation support mechanism capable of delaying the rotation operation of the control target.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a rotary operation support mechanism according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a bottom view of a spacer constituting the rotation support mechanism according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body case 11 Partition part 20 Rotation axis 30 Click mechanism part 31 Magnet part 311 Permanent magnet 312, 313 A pair of yokes 32 Magnetic body part 40 Element for magnetic detection 50 Closure member 51 Cap 52 Spacer

Claims (4)

[Claims] A rotating shaft to which at least a part is inserted and supported in the main body case and to which an object to be controlled is connected; and a click mechanism for stopping rotation of the rotating shaft at a predetermined rotation angle. A rotation mechanism for rotatably supporting an object to be controlled, wherein a click mechanism is provided so as to be rotatable together with a rotating shaft in the main body case and a magnet portion fixed in the main body case; And a magnetic part that is attracted to the magnet part when rotated in the direction by a predetermined angle. 2. A magnet unit constituting a click mechanism unit includes a permanent magnet, and a pair of yokes disposed so as to face each other with the permanent magnet interposed therebetween, and from the inner peripheral surface of the main body case toward the axis. And is supported by a partition formed so that a front end surface thereof is in sliding contact with the outer peripheral surface of the rotating shaft. The partition has a pair of yokes when the magnetic body is attracted to the magnet. 2. The rotation operation support mechanism according to claim 1, further comprising a magnetic detection element for detecting a magnetic field in the magnetic field. 3. The rotation operation support mechanism according to claim 1, wherein a viscous liquid is filled between the main body case and the rotation shaft. 4. The rotating motion support mechanism according to claim 3, wherein a predetermined braking force can be exerted only when the magnetic body rotates in a direction away from the magnet due to the resistance of the viscous liquid.