JP2003097626A - Damper combined with spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper combined with spring capable of easily fitting to an object with less assembly processes. SOLUTION: The damper demonstrates a prescribed braking force by the resistance of a viscous liquid packed inside. The braking force is generated by a rotor 30 rotating relative to a case 20. It comprises a spiral spring 40 so arranged that one end 40a is supported by the rotor 30 while the other end 40b is supported by the case 20. Since a spring member is not required to be disposed independent of the damper as required conventionally, fitting to an object to be controlled is easy for less assembly processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring-combined damper device, and more specifically, it is provided with a spiral spring (spiral spring) and has a damper function as well as a controlled object to be rotated by the action of the spring. The present invention relates to a damper device that also has a function of urging in the rotational direction of.

[0002]

2. Description of the Related Art Conventionally, a spring member and a damper device are provided for a rotating object to be controlled, and the object to be controlled is rotatably operated by urging the object in a constant rotation direction. There is known a technique of delaying the rotational movement of a damper device by a braking force of a damper device that works against the biasing force of a spring member. For example, in an automobile seat, a reclining mechanism for reclining the seat back (object to be controlled) of the seat in the front-rear direction is provided with a spring member for urging the seat back forward, and the seat cushion is seated against the seat cushion of the seat. There is a structure in which a damper device is connected to a shaft member that rotatably supports a back. According to such a seat, when the lock that holds the seat back at the predetermined position is released, the seat back tries to rotate vigorously forward due to the biasing force of the spring member, but the seat back does not rotate. Since the braking force of the damper device is exerted by the damper device and the rotational speed of the damper device is reduced, the seat back rotates at a slow speed.

[0003]

However, in the prior art, since the spring member and the damper device are separately configured, they must be individually attached to the controlled object during assembly. However, it takes time and labor, and it is difficult to reduce the number of assembly steps. In particular,
When attaching a spring member for urging the seat back forward to the seat of the automobile, the spring member must be attached in a state of being distorted to some extent by applying a large external force,
The work was troublesome.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a spring-combined damper device which can be easily attached to an object to be controlled and which can reduce the number of assembling steps. It is another object of the present invention to provide a spring-combined damper device capable of omitting the adjustment of the amount of strain of the spring when it is assembled to the object to be controlled.

[0005]

In order to solve the above-mentioned problems, the present invention according to claim 1 includes a rotating body rotatably provided in a main body case, and the rotating body is provided with respect to the main body case. In the damper device that exerts a predetermined braking force due to the resistance of the viscous liquid filled inside due to the relative rotation operation, one end is supported by the rotating body and the other end is supported by the main body case. There is provided a damper device having a spiral spring provided. The present invention as set forth in claim 2 is characterized in that the other end of the spiral spring is supported by the main body case through a fixing member supported by the main body case. I will provide a. Claim 3
According to the present invention, in the main body case, one end portion is closed by an end wall, and a tubular portion having a partition wall portion projecting from an inner peripheral surface toward an axis, and the tubular portion. A rotor portion formed to have a size such that an outer peripheral surface thereof can be slidably contacted with a tip end surface of the partition wall portion, and a closing portion that closes the other end of the rotor portion. And a vane that is formed to project outward from the outer peripheral surface of the rotor and that is disposed between the rotor portion and the main body case and that is disposed in a chamber filled with the viscous liquid. A damper device according to claim 1 or 2 is provided. According to a fourth aspect of the present invention, the vane is provided with a valve mechanism capable of exerting a braking force only when the rotating body rotates relative to the main body case in one direction. The damper device according to claim 3 is provided. According to a fifth aspect of the present invention, the urging force exerting direction of the spiral spring with respect to the control target and the braking force exerting direction are set to be the same direction. I will provide a. The present invention according to claim 6 is characterized in that the spiral spring is arranged in a recess formed outside the main body case, and the damper according to any one of claims 1 to 5. Provide a device. According to the present invention of claim 7, in the main body case, a tubular portion whose one end is closed by an end wall, a closing portion which closes the other end of the tubular portion, and the end wall. Alternatively, the rotating body is configured to include a first rotor having an uneven cross-section that is provided so as to project from the inner surface of the closed portion, and the rotating body is configured to include a second rotor having an uneven cross-section that meshes with the first rotor. The damper device according to claim 1 or 2, wherein the viscous liquid is filled in a gap between the first rotor and the second rotor. The present invention as set forth in claim 8 is characterized in that the rotating body has a protrusion provided so as to be capable of abutting against the main body case or a fixing member supported by the main body case. Provide a device. The present invention according to claim 9 provides the damper device according to claim 7 or 8, wherein the spiral spring is disposed in the main body case.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in more detail with reference to the drawings. 1 to 4 are views showing a damper device according to a first embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG.
Is a sectional view taken along the line BB in FIG. 1, and FIG. 4 is a sectional view taken along the line CC in FIG. As shown in these drawings, the damper device 10A according to the present embodiment is configured to have a main body case 20, a rotating body 30, and a spiral spring 40.

The main body case 20 has a tubular portion 21 and a closing portion 22 for closing the other end of the tubular portion 21 (see FIGS. 2 and 3). One end of the tubular portion 21 is closed by an end wall 21a, and the partition wall portion 21 is formed so as to project from the inner peripheral surface 21b toward the axial center.
c (see FIG. 4).

A hollow portion 21d having a size capable of accommodating a spiral spring 40, which will be described later, is formed inside one end portion of the tubular portion 21, and the spiral portion disposed in the hollow portion 21d. The other end 4 of the spring 40
An engaging portion 21e that supports 0b is formed so as to protrude from the bottom surface of the recess 21d (see FIGS. 1 to 3).

An insertion hole 23, through which the fixing member 60 (see FIG. 5) is inserted, is provided in the substantial center of the locking portion 21e in plan view (see FIG. 1), and the insertion hole 23 is formed in the main body. It is formed so as to penetrate the case 20 (see FIG. 2). Here, the fixing member 60 is provided on the controlled object or the like in order to fix the main body case 20 to the controlled object or the like. Examples of the fixing member 60 include parallel pins and bolts. To be

The rotary body 30 is rotatably provided in the main body case 20, and has a substantially cylindrical bearing portion 31, a rotor portion 32 formed around the bearing portion 31, and an outer peripheral surface of the rotor portion 32. 33 with a substantially fan-shaped cross section
And is configured (see FIGS. 2 and 3).

The bearing portion 31 is formed in a substantially cylindrical shape having a shaft insertion hole 31a penetratingly formed along the axis, and both ends thereof are an end wall 21a and a closing portion of the cylindrical portion 21 constituting the main body case 20. Holes 21f and 22a respectively formed in 22
And is provided along the axis of the main body case 20. A groove 31b for supporting one end 40a of a spiral spring 40, which will be described later, is provided at one end of the bearing portion 31.
Are formed.

The rotor portion 32 has one surface 32a on the inner surface of the end wall 21a of the tubular portion 21 constituting the main body case 20, and the other surface 3
2b is provided so as to be in sliding contact with the inner surface of each closed portion 22.

As shown in FIGS. 3 and 4, the rotor portion 3
The space formed between 2 and the main body case 20 is a liquid chamber, and the main body case 20 including the liquid chamber is filled with a viscous liquid such as silicone oil.

The vane 33 is a tip surface 33 having a substantially arcuate cross section.
a is the inner peripheral surface 21 of the cylindrical portion 21 that constitutes the main body case 20.
It is disposed in the liquid chamber in sliding contact with b. By disposing the vane 33 in the liquid chamber in this manner, the liquid chamber is divided into a pressure chamber 24a and a non-pressure chamber 24b (see FIG. 4).

As shown in FIGS. 2 and 4, the vane 33 has a large-diameter portion (large-diameter hole) 34a and a small-diameter portion (small-diameter hole) having an inner diameter smaller than the inner diameter of the large-diameter portion 34a. ) 34
b, it penetrates the vane 33 in a direction substantially parallel to the axial direction, and the large diameter portion 34a is provided in the pressure chamber 24a, and the small diameter portion 3
4b is formed into a spherical shape having a diameter larger than the inner diameter of the small diameter portion 34b of the liquid passage and the liquid passage formed so as to communicate with the non-pressure chamber 24b. Valve mechanism 3 including a valve body 34c
4 is provided, and the valve element 34c operates so as to close or open the boundary portion between the large diameter portion 34a and the small diameter portion 34b by receiving the flow pressure of the viscous liquid.

The spiral spring 40 has one end 40a.
Is supported by the rotating body 30 by being fitted into the groove 31b formed in the bearing portion 31, and the hook-shaped other end 40b is hooked on the locking portion 21e formed in the tubular portion 21 so that the main body case 20 is attached. It is supported and disposed in a recess 21d formed outside the main body case 20.

In the present embodiment, the spiral spring 40 is formed in the cylindrical portion 21 as described above, and the concave portion 2 is formed.
Although it is disposed in 1d, a recess may be formed in the closed portion 22 and the spiral spring 40 may be disposed in the recess. In this way, the outside of the main body case 20 (main body case 2
By arranging the spiral spring 40 in the recess formed on one end side of 0 or the other end side), the overall thickness of the damper device 10A can be reduced. Therefore, there is an advantage that the installation space is small.

Further, in this embodiment, the other end 40b of the spiral spring 40 is supported by the main body case 20, but instead of this, the insertion hole 2 formed in the tubular portion 21.
It may be supported by a fixing member (not shown) which is inserted into the main body case 20 and is supported by the main body case 20.

Further, in this embodiment, when the rotating body 30 is fixed so as not to rotate, the body case 20 rotates counterclockwise in FIG. 1 to generate a resistance of the viscous liquid and generate a braking force. In contrast to the spiral spring 40, the spiral spring 40 has an outer diameter as the other end 40b moves clockwise in FIG. 1 when the one end 40a side is fixed so as not to rotate. Are reduced so that the stress increases. That is,
Although the urging force exerting direction (stress direction) of the spiral spring 40 and the braking force exerting direction of the damper device 10A are set to the same direction, it is not limited to such a setting and corresponds to the control target object. Then, the urging force exerting direction of the spiral spring 40 and the braking force exerting direction of the damper device 10A may be set in opposite directions.

The damper device 10A according to this embodiment is used as follows. That is, for example, when the damper device 10A is used for a vehicle seat, as shown in FIG. 5, the reclining mechanism 12 provided at the connecting portion between the seat back 100 and the seat cushion 110 is used.
Installed as part of 0.

More specifically, an upper hinge bracket 121, which constitutes a reclining mechanism 120 and is fixed to the seat back 100, is rotatably attached to a support shaft 130 that supports the seat back 100. In the damper device 10A, the support shaft 130 is inserted into the shaft insertion hole 31a formed in the bearing portion 31 of the rotating body 30 so that the rotating body 30 is connected to the supporting shaft 130 and the main body case 20 is seated back. The fixing member 60 protruding from the upper hinge bracket 121 is inserted into the insertion hole 23 formed in the tubular portion 21 of the main body case 20 so that it can rotate around the support shaft 130 as the 100 rotates. By doing so, the body case 20 is connected to the upper hinge bracket 121. The damper device 1
OA is attached so as to bias the seat back 100 forward by the spiral spring 40.

As described above, when a spring member for urging the seat back forward is attached to the seat of the automobile, it is necessary to apply a large external force to the spring member to distort it to some extent. According to the damper device 10A of the embodiment, the work of adjusting the distortion amount of the spiral spring 40 can be omitted when the damper device 10A is assembled to the seat.

That is, according to the damper device 10A, the rotor 30 is rotated in one direction (counterclockwise direction in FIG. 4) in the main body case 20 at the manufacturing stage.
The partition wall portion 21c of the tubular portion 21 forming the main body case 20.
In the state where the vane 33 of the rotating body 30 is abutted, the spiral spring 40, which is distorted as necessary, is attached to the locking portion 21e of the main body case 20 and the bearing portion 31 of the rotating body 30 so that Rear spiral spring 4
Even if 0 is returned to the original shape, the vane 33 comes into contact with the partition wall portion 21c and the rotation of the main body case 20 and the rotating body 30 is suppressed, so that the spiral spring 40 continues to hold a predetermined stress. Therefore, when the damper device 10A is mounted on the seat of the automobile, the initial setting of the spiral spring 40 has already been made, so that it is not necessary to adjust the distortion amount.

Further, the damper device 10A includes a main body case 2
0 and the spiral spring 40 provided integrally with the rotating body 30, the spring member and the damper device are not required to be provided as in the conventional case.
It only needs to be installed once.

As described above, according to the damper device 10A, it is extremely easy to assemble the object to be controlled, and the working time can be greatly shortened. Therefore, the number of assembling steps can be greatly reduced as compared with the conventional one. Is.

The damper device 10A attached to the seat of the automobile is formed on the gear portion 121a formed on the upper hinge bracket 121 and the lock plate 123 by operating the operation lever 122 constituting the reclining mechanism 120. When the gear portions 123a are disengaged from each other, the body spring 20 rotates in one direction (counterclockwise in FIG. 1) about the support shaft 130 due to the repulsive action of the spiral spring 40. The seat back 100 connected to the main body case 20 via 121 can be rotated forward. Further, when the main body case 20 rotates in one direction (clockwise direction in FIG. 4) as described above, the vane 33 is provided in the main body case 20 by the pressure of the viscous liquid pressed by the partition wall portion 21c. Large-diameter portion 34 in which the valve body 34c formed constitutes a liquid flow path
The boundary between a and the small diameter portion 34b is closed. Thereby,
The viscous liquid is applied to the inner peripheral surface 21 b of the main body case 20 and the vanes 3.
3 and the tip surface 33a of the partition wall portion 21c, and a small gap between the tip surface of the partition wall portion 21c and the outer peripheral surface of the rotor portion.
Since it moves from 4a to the non-pressure chamber 24b,
At that time, a large resistance is generated. The damper device 10A is
A predetermined braking force is exerted by the resistance of such viscous liquid,
The seat back 100 can be rotated forward at a slow speed.

When reclining the seat back 100 rearward, the main body case 20 rotates about the support shaft 130 in the opposite direction (counterclockwise direction in FIG. 4), so that the partition wall portion 21c. The pressure of the viscous liquid pressed by the valve body 34c in the large diameter portion 34a
Moves and the boundary between the large diameter portion 34a and the small diameter portion 34b is opened. Therefore, in addition to the above-mentioned gaps, the viscous liquid has liquid flow paths (a large diameter portion 34a and a small diameter portion 34).
Since a large amount will be moved also through b), the damper function of the damper device 10A does not work.

Next, a second embodiment of the present invention will be described. 6 and 7 are views showing a damper device 10B according to the present embodiment, FIG. 6 is a vertical cross-sectional view, and FIG. 7 is a cross-sectional view taken along line DD of FIG.

As shown in these figures, the damper device 10B according to the present embodiment also has a body case 20, a rotating body 30 and a spiral spring 4 as in the first embodiment.
However, in the present embodiment, the first rotor 22b having an uneven cross-section is provided on the inner surface of the closed portion 22 of the tubular portion 21 and the closed portion 22 that form the main body case 20. Has been done. However, the location of the first rotor 22b is not limited, and the first rotor 22b may be provided on the inner surface of the end wall 21a that closes one end of the tubular portion 21. Also, the first
In the embodiment, the tubular portion 21 and the closing portion 22 are screwed and coupled, but in the present embodiment, the both are coupled by caulking.

The rotating body 30 is formed in a substantially tubular shape having a shaft insertion hole 31a formed so as to penetrate along the axis, and both ends thereof are an end wall 21a and a closing portion of a tubular portion 21 constituting the main body case 20. 22 has a bearing portion 31 supported along holes 21f and 22a formed respectively in the main body case 20 and provided along the axis of the main body case 20, and engages with a first rotor 22b protruding from the inner surface of the closing portion 22. The second rotor 35 having an uneven cross section is provided. Then, the viscous liquid is filled in the gap formed in the portion where the first rotor 22b and the second rotor 35 are engaged with each other.

Further, as shown in FIG. 7, the rotating body 30 is attached from the outer peripheral surface of the second rotor portion 35 so as to come into contact with the fixing member 50 composed of a bolt supported by the main body case 20. A protruding portion 36 formed so as to protrude is provided.

The protrusion 36 is fixed in the state where the protrusion 36 is brought into contact with the fixing member 50 in the manufacturing stage of the damper device 10B, and the spiral spring 40 which is distorted as necessary is fixed as described below. By mounting on the member 50 and the rotating body 30, the spiral spring 4 after mounting
It is provided for the purpose of keeping a constant stress at 0. Therefore, for example, by forming a protrusion on the inner surface of the tubular portion 21 of the body case 20 and bringing the protrusion 36 into contact with the protrusion, the force of the spiral spring 40 to restore the original shape of the body A structure that prevents the case 20 or the rotating body 30 from rotating may be adopted.

The fixing member 50 is similar to the fixing member 60 described in the first embodiment in that the main body case 2
It is provided in order to fix 0 to the controlled object or the like, and is supported by the main body case 20 as described above in the present embodiment. As the fixing member 50, a parallel pin or the like may be used instead of the bolt.

The spiral spring 40 has the end wall 21 a of the tubular portion 21 and the rotating body 30 in the main body case 20.
Of the second rotor portion 35, one end 40a of which is supported by the rotating body 30 by being fitted into the groove 31b formed in the bearing portion 31, and the other end 40b of which is hooked is supported by the main body case 20. It is supported by the fixed member 50 by being hung on the fixed member 50. Although the spiral spring 40 is provided in the main body case 20 as described above in the present embodiment, it is of course possible to adopt a structure in which the spiral spring 40 is arranged outside the main body case 20.

The damper device 10B according to this embodiment is used as follows. That is, for example, when the damper device 10B is used for a vehicle seat, the rotary body 30 is coupled to the support shaft supporting the seat back and the main body case 20 is used in the damper device 10B as in the first embodiment. It is connected to an upper hinge bracket fixed to the seat back via a fixing member 50 so that the seat back can be rotated about the support shaft as the seat back is rotated. The damper device 10B is attached so as to bias the seat back forward by the spiral spring 40.

Also, with this damper device 10B, as described above, the protrusion 36 provided so that the rotating body 30 can come into contact with the fixing member 50 supported by the main body case 20.
Since the spiral spring 40 is configured to have a constant stress, it is possible to maintain a constant stress in the spiral spring 40, and it is possible to omit the work of adjusting the strain amount of the spiral spring 40 when the spiral spring 40 is mounted on an automobile seat. . Also,
Since the damper device 10B is configured to include the spiral spring 40 integrally provided in the main body case 20 and the rotating body 30 as in the first embodiment, the damper device 10B can be attached only once, and thus the object to be controlled can be controlled. Is extremely easy to assemble. Also, the working time can be significantly reduced. Therefore, the number of assembling steps can be significantly reduced as compared with the conventional one.

Further, when the seat back is reclined forward, the meshing of the gear portions provided in the reclining mechanism is released, so that the body case 20 is centered on the spindle by the repulsive action of the spiral spring 40. As it rotates in one direction, the seat back connected to the main body case 20 via the upper hinge bracket can be rotated forward. Further, as the main body case 20 rotates in one direction as described above, the main body case 20 is fixed to the first rotor 22b that is non-rotatably fixed in the main body case 20 by being connected to the support shaft. As a result, the second rotor 35 provided on the side of the main body case 20 rotates, so that the resistance of the viscous liquid filled in the gap between the two is generated. The damper device 10B exerts a predetermined braking force by the resistance of the viscous liquid, and can rotate the seat back forward at a slow speed.

[0038]

As described above, according to the present invention,
It can be easily attached to the controlled object, and the number of assembly steps can be reduced. Further, it is possible to omit the adjustment of the amount of strain of the spring at the time of assembling the object to be controlled.

[Brief description of drawings]

FIG. 1 is a plan view showing a damper device according to a first embodiment of the present invention.

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

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a diagram for explaining an example of use of the damper device according to the above embodiment.

FIG. 6 is a vertical cross-sectional view showing a damper device according to a second embodiment of the present invention.

FIG. 7 is a sectional view taken along line DD of FIG.

[Explanation of symbols]

10A, 10B damper device 20 body case 21 Cylindrical part 22 Block 30 rotating body 31 Bearing 32 rotor 33 vanes 34 valve mechanism 40 spiral spring

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Itagaki             1-34-6 Honsho, Sumida-ku, Tokyo So Corporation             Within Mick Engineering F term (reference) 3J069 AA41 CC40 DD38 DD48

Claims (9)

[Claims] 1. A body is provided with a rotatable body rotatably provided therein, and the viscous liquid filled in the interior of the body causes a predetermined resistance due to the resistance of the body to rotate relative to the body case. A damper device that exerts a braking force, comprising a spiral spring having one end supported by the rotating body and the other end supported by the main body case. 2. The damper device according to claim 1, wherein the other end of the spiral spring is supported by the main body case via a fixing member supported by the main body case. 3. The main body case, one end of which is closed by an end wall, and which has a partition wall projecting from the inner peripheral surface toward the axial center, and the tubular part. And a closing portion that closes the other end portion of the rotor, wherein the rotating body has a rotor portion whose outer peripheral surface is formed in a size capable of sliding contact with the tip end surface of the partition wall portion, and an outer periphery of the rotor portion. A vane that is formed so as to project outward from the surface and is disposed in a chamber filled with a viscous liquid that is formed between the rotor portion and the main body case. The damper device according to 1 or 2. 4. The valve mechanism, wherein the vane is provided with a valve mechanism capable of exerting a braking force only when the rotating body rotates in one direction relative to the main body case. Item 3. The damper device according to item 3. 5. The damper device according to claim 4, wherein the urging force exerting direction of the spiral spring with respect to the controlled object and the braking force exerting direction are set to be the same direction. 6. The damper device according to claim 1, wherein the spiral spring is arranged in a recess formed outside the main body case. 7. The main body case includes a tubular portion whose one end is closed by an end wall, a closing portion which closes the other end of the tubular portion, and an inner surface of the end wall or the closing portion. And a first rotor having an uneven cross section, the rotating body having a second rotor having an uneven cross section that meshes with the first rotor, and the viscous liquid is 3. The gap between the first rotor and the second rotor is filled in the gap.
The described damper device. 8. The damper device according to claim 7, wherein the rotating body has a protrusion provided so as to be capable of contacting the main body case or a fixing member supported by the main body case. 9. The damper device according to claim 7, wherein the spiral spring is arranged in the main body case.