KR102025702B1 - clutch device - Google Patents

Abstract

A high safety clutch device capable of reliably maintaining a locked state even when an excessive load is applied to the second member side.
The clutch device includes a lock drum 1 on the first member side, an output shaft plate 6 on the second member side, a lock spring 3 fitted inwardly to the lock drum 1, and a lock spring 3, respectively. It was assumed that the adjusting drum 2 arranged inside was provided. The lock spring 3 has an outer diameter slightly larger than the inner diameter of the lock drum 1 in the free state, and is formed with a lock spring step 3c consisting of a lock spring curved portion 3d and a lock spring bottom 3e. . The lock spring tension side contact 3a and the lock spring compression side contact 3b were provided in the lock spring 3 side of the lock spring 3 side, and the diameter expansion side, respectively. The adjustment spring 2 is provided with a lock spring operating piece 8 for pressing the lock spring tension side contact 3a, and an output shaft plate 6 with a lock spring pressing piece for pressing the lock spring pressing side contact 3b. 7) installed.

Description

Clutch device

The present invention relates to a clutch device which is interposed between a first member and a second member, and switches a second member to a lock release state and a non-rotation lock state with respect to the first member.

As a mechanism of the seat lifter which adjusts the height of a vehicle seat by operating an operation lever, it is known that the lock spring which inserted the lock spring which has an outer diameter slightly larger than the inner diameter of a lock drum inside is inside a lock drum (for example, patent documents 1- 3). In these mechanisms, in the state where the operation lever (for example, reference numeral 90 in FIG. 7 of Patent Document 2) is not operated, the outer circumferential surface of the lock spring (reference numeral 32 in the same drawing) is connected to the inner circumferential surface of the lock drum (reference numeral 20 in the same drawing). When the operation lever is operated while keeping the lock state in which the lock spring cannot be rotated with respect to the lock drum, the end of the lock spring (37 in the same drawing) is moved in the tension direction (the diameter of the lock spring is reduced). Direction) and the outer circumferential surface of the lock spring is separated from the inner circumferential surface of the lock drum, so that the unlocking state capable of rotating the lock spring with respect to the lock drum is developed.

The mechanism allows stepless adjustment of the height of the vehicle seat by simple operation, but has the following drawbacks. That is, these mechanisms have a structure in which the load applied to the vehicle seat in the locked state is supported at the end of the lock spring. Therefore, when an excessive load is applied to the vehicle seat due to an impact such as an accident, the end portion of the lock spring may be damaged and the lock state may not be maintained, and the vehicle seat may suddenly move and cause great damage to the human body. Moreover, in the vehicle ottoman apparatus, in the mechanism for switching the storage state accommodated under the seat and the use state withdrawn from the seat, the lock drum has an inner diameter slightly smaller than the outer diameter of the lock drum. It is known to sandwich a spring outside (for example, patent document 4). However, the same problem exists with this type of vehicle ottoman device. A mechanism capable of reliably maintaining the locked state even if an excessive load is applied to the vehicle seat due to an accident or the like is not found.

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-195312 Patent Document 2: Japanese Patent Application Laid-Open No. 2002-195323 Patent Document 3: Japanese Unexamined Patent Publication No. 2009-168094 Patent Document 4: Japanese Patent Application Laid-Open No. 2008-013132

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem, and the second member (output shaft for raising and lowering the vehicle seat, etc.) with respect to the first member (member for fixing the lock drum, etc.) is switched to the unlocked unlockable state and the non-rotatable lock state. As a clutch device, it is to provide a highly stable clutch device capable of reliably maintaining a locked state even when an excessive load is applied to the second member side. It is also an object of the present invention to provide such a high safety clutch device as simple as possible.

The said subject is a clutch device interposed between a 1st member and a 2nd member, and switching a 2nd member to a lock release state which can be rotated with respect to a 1st member, and a lock state which is not rotatable, The lock fixed to a 1st member side Drum; An output shaft plate fixed to the second member side; A lock spring fitted inwardly to the lock drum, the lock spring having an outer diameter slightly larger than the inner diameter of the lock drum in a free state; A lock spring curved portion having an adjustment drum disposed inside the lock spring, the lock spring being bent toward the center of the lock spring; A lock spring stepped portion is formed, consisting of a lock spring bottom bent from the lock spring bend in the winding forward direction of the lock spring, and a lock spring tension side contact is provided on the side of the lock spring bent shaft axis. The lock spring compression side contact is provided on the side which enlarges the lock spring of the lock spring curved part, and the lock spring operation piece for pressurizing the lock spring tension side contact is provided in the adjustment drum, The output shaft plate is solved by providing a clutch device characterized in that a lock spring pressing piece for pressing the lock spring compression-side contact is provided. Specific operations of the clutch device of the present invention will be described later.

By causing the lock spring pressing piece to be pressed against the lock spring compression side contact of the lock spring bent portion at the lock spring stepped portion as in the clutch device of the present invention, an excessive load is applied to the second member side, and the load is locked through the output shaft plate. When the spring pressing piece is caught, the lock spring bottom guides the lock spring pressing piece to the inner side of the lock spring (the gap between the inner circumferential surface of the lock spring and the outer circumferential surface of the lock spring step), thereby developing a locked state and improving safety. This becomes possible. Moreover, since such an effect can be acquired by providing a lock spring step part in a lock spring, it is also easy to suppress the cost and weight of a clutch device.

Although the lock spring bottom part may be free in the clutch device of this invention, it is preferable to carry out as follows. That is, it is preferable to further provide the lock spring bottom accommodating drum which fits inwardly to the lock spring, and accommodates the lock spring bottom part in the outer peripheral surface. This makes it possible to prevent the lock spring bottom from rising even when an excessive load is applied to the second member side and to maintain the position relative to the lock spring pressing piece. Therefore, the lock spring pressing piece guided to the gap between the inner circumferential surface of the lock drum and the outer circumferential surface of the lock spring is deformed within the gap to intentionally express the engaged state, and it is also possible to maintain the locked state more reliably.

In addition, in the clutch device of the present invention, the place where the lock spring step portion is provided is not particularly limited, and either the end portion or the intermediate portion of the lock spring may be used. The lock spring step may be formed in the middle of the lock spring (for example, the fourth wound when the lock spring is wound seven times). The above-mentioned effect can be acquired even if a lock spring step part is provided in any one of these places.

Furthermore, the clutch device of the present invention comprises: an adjustment spring having an outer diameter slightly larger than the inner diameter of the adjustment drum in a free state, fitted inward to the adjustment drum; An operation drum disposed inside the adjustment spring; A return drum fitted inwardly to the adjustment spring; An adjustment spring curved portion further comprising a return spring for returning the displaced return drum to an initial position, the adjustment spring being bent toward the center of the adjustment spring; An adjustment spring stepped portion formed of an adjustment spring bottom bent from the adjustment spring bend in the winding forward direction of the adjustment spring is formed, and an adjustment spring tension side contact is provided on the side of the adjustment spring bend axis. And an adjustment spring compression-side contact point is provided on the side where the adjustment spring is enlarged in the adjustment spring bent portion, and an adjustment spring operation piece for pressing the adjustment spring tension-side contact point on the return drum is provided. It is preferable that an adjustment spring press piece for pressing the adjustment spring compression-side contact is provided in the operation drum, and the position of the second member with respect to the first member can be adjusted by intermittent movement.

This structure is suitable when it adopts to the height adjustment apparatus of a vehicle seat, etc. The reason for the formation of the adjustment spring step portion consisting of the adjustment spring curved portion and the adjustment spring bottom in the adjustment spring is the same as that of the lock spring. The adjustment spring stepped portion may be provided at any one of the end portion and the intermediate portion (including the intermediate portion) of the adjustment spring, similarly to the lock spring. Furthermore, it is the same as that of a lock spring if it is provided with the adjustment spring bottom accommodating drum which fits inwardly to an adjustment spring, and accommodates the adjustment spring bottom part in the outer peripheral surface.

Furthermore, in the clutch device of the present invention, the portion in contact with the inner circumferential surface of the lock drum on the outer circumferential surface of the lock spring, and / or the inner circumferential surface of the adjustment drum on the outer circumferential surface of the adjustment spring (in the case of installing the lock spring bottom receiving drum) It is also preferable to provide a plurality of recesses in a portion in contact with the inner peripheral surface of the bottom accommodating drum). By this recessed portion, the locking force of the lock spring can be increased by increasing the friction force of the lock spring against the inner circumferential surface of the lock drum and the friction force of the adjustment spring against the inner circumferential surface of the adjustment drum. Since this recessed part is small about 0.2-0.5 mm in width and 0.05-0.2 mm in depth, what is necessary is just to perform plastic processing using a metal mold | die and a rolling die. These do not affect the strength of the lock spring or the strength of the adjustment spring (Fig. 4).

Further, when the clutch device of the present invention is used in a vehicle ottoman device of a link mechanism in which the first member and the second member are part of a constituent member of the link mechanism and the adjustment drum is a clutch operation member, a locking force is strong and a safe ottoman apparatus is provided. can do.

  As described above, according to the present invention, it becomes possible to provide a high safety clutch device capable of reliably maintaining a locked state even when an excessive load is applied to the second member side. It is also possible to provide a highly secure clutch device in a simple structure.

1 is a cross-sectional view showing a state in which the clutch device of the first embodiment is cut in a plane perpendicular to the output shaft.
It is sectional drawing which shows the state which cut | disconnected the clutch device of 1st Embodiment to the AA surface of FIG.
3 is a perspective view illustrating a state in which the clutch device of the second embodiment is disassembled into parts.
It is sectional drawing which shows the state which cut | disconnected the periphery of the lock spring pressing piece in the clutch device of 2nd Embodiment in the plane perpendicular | vertical to an output shaft.
5 is a cross-sectional view showing an example of a state after an excessive load is applied to the second member side from the state shown in FIG. 4 in the clutch device of the second embodiment.
6 is a perspective view illustrating a state in which the clutch device of the third embodiment is disassembled into parts.
It is sectional drawing which shows the state which cut | intermitted the intermittent movement mechanism in the plane perpendicular | vertical to an output shaft in the clutch apparatus of 3rd Embodiment.
8 is a cross-sectional view showing a state in which the clutch device of the fourth embodiment is cut in a plane perpendicular to the output shaft.
It is sectional drawing which shows the state which cut | disconnected the clutch device of 4th Embodiment to the BB surface of FIG.
10 is a cross-sectional view showing a state in which a vehicle ottoman device equipped with the clutch device of the present invention is cut in a plane perpendicular to the output shaft 5.

Preferred embodiments of the clutch device of the present embodiment will be described in more detail with reference to the drawings. Hereinafter, although four embodiment from 1st embodiment to 4th embodiment is described as an example, the technical scope of this invention is not limited to this, It can change suitably in the range which does not deviate from the meaning of this invention.

<1st embodiment>

First, the clutch device of 1st Embodiment is demonstrated. 1 is a cross-sectional view showing a state in which the clutch device of the first embodiment is cut in a plane perpendicular to the output shaft 5. It is sectional drawing which shows the state which cut | disconnected the clutch device of 1st Embodiment to the A-A surface of FIG. The clutch device of 1st Embodiment is interposed between a 1st member and a 2nd member, and switches a lock release state which can be rotated with respect to a 1st member, and a lock state which can not be rotated. The clutch device of the first embodiment has a lock drum 1, an output shaft plate 6, an output shaft 5, a lock spring 3, and an adjustment drum 2, as shown in FIG. have. The lock drum 1 is fixed to the first member (not shown), and the output shaft plate 6 is fixed to the second member (not shown) via the output shaft 5 fixed thereto. The lock spring 3 has an outer diameter that is several percent larger than the inner diameter of the lock drum 1 in the free state, and is forcibly fitted inward to the lock drum 1. The first member and the second member also vary according to the use of the clutch device, and the like. For example, when the clutch device is mounted on a lifting mechanism (lifter device) that performs height adjustment of the vehicle seat, the first member is mounted on the vehicle seat. A seat bottom frame, and the second member becomes an input side member of the lifting mechanism.

As shown in Fig. 1, the lock spring 3 has a lock spring curved portion 3d bent toward its center and a lock spring bent in the winding forward direction of the lock spring 3 from the lock spring curved portion 3d. The lock spring step part 3c which consists of a bottom part 3e is formed. In the clutch device of the first embodiment, the lock spring stepped portions 3c are provided at both ends of the lock spring 3. The lock spring 3 side of the lock spring curved portion 3d has a lock spring tension side contact 3a, and the lock spring 3 of the lock spring curved portion 3d is enlarged in diameter. The side to be made becomes the lock spring compression side contact 3b. The adjustment spring 2 is provided with a lock spring operating piece 8 for pressing the lock spring tension side contact 3a. The output shaft plate 6 is provided with a lock spring pressing piece 7 for pressing the lock spring compression side contact 3b.

In the clutch device of the first embodiment, when the adjustment drum 2 rotates with respect to the lock drum 1, such as operating an operation lever (not shown), the lock spring operating piece 8 integrally provided therein is At the lock spring tension side contact 3a, the lock spring bent portion 3d is pressed to axially lock the lock spring 3, and the lock spring 3 is pivotable with respect to the lock drum 1. It becomes the state (lock spring operation state). That is, the lock release state which can rotate the 2nd member (member which fixed the output shaft 5) with respect to a 1st member (member which fixed the lock drum 1) is expressed.

On the other hand, when the operation of the operation lever is stopped, the lock spring 3 is enlarged in its original state and strongly adhered to the inner circumferential surface of the lock drum 1, and the state cannot be rotated with respect to the lock drum 1 (lock Spring fixed state). That is, the locked state which makes it impossible to rotate a 2nd member with respect to a 1st member is expressed. In the lock spring fixed state, even if the load is applied to the second member and the output shaft plate 6 tries to rotate with respect to the lock drum 1, the lock spring pressing piece 7 is locked by the lock spring compression side contact 3b. ), The lock spring 3 is brought into close contact with the inner circumferential surface of the lock drum 1, so that a large locking force can be obtained. Further, even when an excessive load is applied to the second member side, the lock spring pressing piece 7 is moved to the inside of the lock spring 3 (the inner circumferential surface of the lock spring 3 and the lock spring step) by the lock spring bottom 3e. It guides to the clearance gap of the outer peripheral surface of the part 3c), and it is possible to reliably hold | maintain a locked state.

<2nd embodiment>

Next, the clutch device of 2nd Embodiment is demonstrated. 3 is a perspective view illustrating a state in which the clutch device of the second embodiment is disassembled into parts. 4 is a cross-sectional view showing a state in which the periphery of the lock spring pressing piece 7 in the clutch device of the second embodiment is cut in a plane perpendicular to the output shaft 5. 5 is a cross-sectional view showing an example of a state after an excessive load is applied to the second member side from the state shown in FIG. 4 in the clutch device of the second embodiment.

The clutch device of 2nd Embodiment is equipped with the lock spring bottom accommodating drum 17 fitted in the lock spring 3 inward as shown to FIGS. The lock spring bottom receiving drum 17 is in the inner and outer relation of the same member with respect to the adjusting drum 2. The lock spring bottom accommodating drum 17 accommodates the lock spring bottom 3e on its outer circumferential surface, so that even when a large load is applied to the lock spring curved portion 3d from the lock spring pressing piece 7, the lock spring bottom 3e The shape of the lock spring stepped portion 3c is maintained so as not to deform, and the lock spring pressing piece 7 is guided more reliably to the gap between the inner circumferential surface of the lock spring 3 and the outer circumferential surface of the lock spring stepped portion 3c. Doing.

The lock spring pressing pieces 7 guided to the gap are deformed within the gap and engaged with each other as shown in FIG. 5. In addition, this deformation | transformation state is an example for description, and actually selects the shape which is deformed and clamped in another form.

Third Embodiment

Next, the clutch device of 3rd Embodiment is demonstrated. 6 is a perspective view illustrating a state in which the clutch device of the third embodiment is disassembled into parts. FIG. 7: is sectional drawing which showed the state which cut | intermitted the intermittent movement mechanism in the plane perpendicular | vertical to the output shaft 5 in the clutch apparatus of 3rd Embodiment. As shown in FIG. 3, the clutch device of the above-described second embodiment includes a lock drum 1, an adjustment drum 2, a lock spring 3, an output shaft 5, and an output shaft plate 6. The clutch device according to the third embodiment of the present invention has an adjustment spring 10, an operation drum 11, a return drum 12, in addition to the lock mechanism as shown in FIG. And an intermittent movement mechanism composed of a return spring 13 and an adjustment spring bottom accommodating drum 18. An operation plate 14 is further provided outside the return spring 13. The operation plate 14 is fixed to operation means such as an operation lever (not shown).

The adjusting spring 10 has an outer diameter that is several percent larger than the inner diameter of the adjusting drum 2 in the free state, and is forcibly fitted inward to the adjusting drum 2 as shown in FIG. The operation drum 11 is disposed inside the adjustment spring 10, and one end thereof is integrally fixed to the operation plate 14. The return drum 12 has a small diameter portion at one end thereof fitted into the adjustment spring 10 through an opening provided in the lock drum 1, and an enlarged diameter portion at the other end thereof. Is arranged outside the lock drum 1. The return drum 12 has a structure divided into a first return drum 12a and a second return drum 12b. The return spring 13 is supported by the enlarged diameter portion of the return drum 12. The return spring contact piece 4 provided in the lock drum 1 is arrange | positioned at the clearance gap of a pair of curved part provided in the both ends of the return spring 13. As shown in FIG. The return spring 13 is for returning the return drum 12 displaced from the initial position to the initial position. The adjustment spring bottom accommodating drum 18 is integrally provided on the same axis with respect to the output shaft 5.

As shown in Figs. 6 and 7, the adjustment spring 10 is bent in the winding forward direction of the adjustment spring 10 from the adjustment spring curved portion 10d and the adjustment spring curved portion 10d. An adjustment spring stepped portion 10c formed of the true adjustment spring bottom portion 10e is formed. In the clutch device of the third embodiment, although the adjustment spring stepped portion 3c is provided at both ends of the adjustment spring 10, it is the same as the lock spring stepped portion 3c in the clutch device of the fourth embodiment described later. You may install in the intermediate part of the adjustment spring 10. FIG. The side on which the adjustment spring 10 of the adjustment spring bend portion 10d is axially reduced is the adjustment spring tension side contact 10a, and the adjustment spring 10 of the adjustment spring bend portion 10d is expanded in diameter. The side to be made becomes the adjustment spring compression side contact 10b. The return drum 12 is provided with an adjustment spring operation piece 16 for pressing the adjustment spring tension side contact 10a. The operation spring 11 is provided with an adjustment spring presser 15 for pressing the adjustment spring compression-side contact 10b.

By employ | adopting the structure of FIG. 7, the clutch device of 3rd Embodiment can intermittently adjust and move the position of the 2nd member with respect to a 1st member as follows. Here, it is demonstrated that the operation lever is being fixed to the operation plate 14 for convenience of description. First, when the operation plate 14 and the operation drum 11 are rotated by operating the operation lever from the initial position, the adjustment spring presser 15 presses the adjustment spring compression side contact 10b at the adjustment spring 10. (Iii) Therefore, the adjustment spring 10 is enlarged in diameter and its outer circumferential surface is in close contact with the inner circumferential surface of the adjustment drum 2, and the adjustment spring fixed state (the adjustment spring 10 and the adjustment that cannot be rotated with respect to the adjustment drum 2) is adjusted. Drum 2 is integrated). Thereby, the operation drum 11 and the adjustment drum 2 rotate integrally.

On the other hand, when trying to return the operation lever from the displacement position to the initial position, the return drum 12 is rotated by the return spring 13 beforehand, and the adjustment spring operation piece 12c is tensioned by the adjustment spring 10 of the adjustment spring 10. The side contact 10a is pressed. Therefore, the adjustment spring 10 is axially reduced to an adjustment spring movable state which can be rotated with respect to the adjustment drum 2. In the adjustment spring operating state, the operation drum 11 rotates, but the adjustment drum 2 does not rotate. That is, in the clutch device of the third embodiment, when the operation lever is operated from the initial position to the displacement position, the output shaft 5 rotates to operate the second member, and when the operation lever is returned from the displacement position to the initial position, the output shaft (5) does not rotate, and the 2nd member does not operate. For this reason, the position of the 2nd member with respect to a 1st member is made to rotate rotation intermittently. As mentioned above, since the clutch device of 3rd Embodiment is equipped with the intermittent movement mechanism, it can be suitably employ | adopted in the case of making large angle adjustment despite a limited operation angle, for example, the height adjustment apparatus of a vehicle seat. . In the clutch device of the third embodiment, the same configuration as that of the clutch device of the other embodiment can be adopted for the configurations other than those described herein, and thus detailed description thereof is omitted.

Fourth Embodiment

Next, the clutch device of 4th Embodiment is demonstrated. 8 is a cross-sectional view showing a state in which the clutch device of the fourth embodiment is cut in a plane perpendicular to the output shaft 5. It is sectional drawing which shows the state which cut | disconnected the clutch device of 4th Embodiment to the B-B surface in FIG. In the clutch device from the first embodiment to the third embodiment, the lock spring step portions 3c are provided at both ends of the lock spring 3, but in the clutch device of the fourth embodiment, those shown in FIG. Similarly, the lock spring step part 3c is provided in the intermediate part of the lock spring 3. As shown in FIG. Specifically, the lock spring step 3c is constituted by a pair of lock spring bent portions 3d provided near the middle of the lock spring 3 and the lock spring bottom 3e that connects the lock spring step 3c. The lock spring pressing piece 7 is fitted into the gap between the lock spring curved portion 3d. For this reason, the lock spring curved part 3d which comprises the lock spring step part 3c becomes the lock spring compression side contact 3b, lock spring connection fixed contact.

In contrast, the lock spring tension side contact 3a is always provided at the end of the lock spring 3. In the clutch device of 4th Embodiment, the lock spring tension side contact 3a was provided in the lock spring curved part 3d provided in the edge part of the lock spring 3 separately. In this case, the lock spring curved portion 3d at the end of the lock spring 3 does not need to be provided with the lock spring bottom portion 3e to form the lock spring step 3c. This is because, when the excessive load is applied to the second member side, the load is applied to the lock spring compression side contact 3b, whereas the load is not applied to the lock spring tension side contact 3a. This content is the same also about the adjustment spring 10 described in the clutch device of 3rd Embodiment. In the clutch device of the fourth embodiment, the same configuration as that of the clutch device of the other embodiments can be adopted for the configurations other than those described herein, and thus the detailed description thereof will be omitted.

<Application Example>

Subsequently, an application example of the present invention will be described. 10 is a cross-sectional view showing a state in which a vehicle ottoman device equipped with the clutch device of the present invention is cut in a plane perpendicular to the output shaft 5. The vehicular ottoman device shown in FIG. 10 includes the clutch device 100, the link mechanism 200, and the ottoman body 300 of the present invention. The clutch device 100 can be used in any of the embodiments described above. However, since the intermittent moving mechanism is not particularly necessary in the vehicle ottoman device, the clutch device 100 without the intermittent moving mechanism is used here. The first clutch operating member 59a provided with the first lock spring operating piece 58a at the distal end portion, and the second lock spring operating piece 58b provided with the distal end portion at the distal end portion thereof. It consists of two clutch operation members 59b. And the link mechanism 200 is for supporting the ottoman main body 300 in the state which can be pulled forward from the lower side of a seat. Among the members constituting the link mechanism 200, the lock drum 1 is fixed to the first member 210, and the output shaft 5 is fixed to the second member 220.

The specific operation of the vehicular ottoman device shown in FIG. 10 will be described. If the base end of the first clutch operating member 59a and the base end of the second clutch operating member 59b rotate in a direction away from each other, such as an operation lever (not shown) is operated, the first lock spring operation is performed. The piece 58a and the 2nd lock spring operation piece 58b rotate in the direction which approaches each other, and press the lock spring tension side contact 3a provided in the both ends of the lock spring 3, respectively. . Therefore, the lock spring 3 is reduced in diameter and is in the unlocked state. In this state, the Ottoman body 300 is extended forward or stored under the seat. When the operation of the operation lever is stopped, the lock spring 3 is enlarged in diameter, and the point of appearance of the locked state is similar to that of the clutch device of the first embodiment described above. In addition, as described above, when a plurality of recesses 21 (FIG. 3) are provided in the part in contact with the lock drum 1 on the outer circumferential surface of the lock spring 3, the spring is used for an ottoman device or the like which has increased the locking force. Locking mechanism can be realized.

Thus, in the vehicle ottoman apparatus shown in FIG. 10, although the part corresponded to the adjustment drum 2 was comprised by the some clutch operating member (1st clutch operating member 59a and 2nd clutch operating member 59b), It is not limited to this, One clutch operation member may be sufficient.

<Use>

The clutch device of the present invention described above is not limited in use, and can be employed in various applications. Among them, the lifting mechanism of the vehicle seat lifter device, the angle adjustment mechanism of the vehicle seat reclining device, the lock mechanism of the vehicle ottoman device, and the like can be suitably employed. In all of the clutch devices used in these devices, an excessive load may be applied to the second member side due to an accident or the like. Therefore, the advantage that the safety of an occupant can be improved by using the clutch device of this invention is acquired.

1: Lock Drum 2: Adjustment Drum
3: lock spring 3a: lock spring tension side contact
3b: Lock spring compression side contact 3c: Lock spring step
3d: lock spring bend 3e: lock spring bottom
4: Return spring contact piece 5: Output shaft
6: output shaft plate 7: lock spring pressing piece
8: Lock spring operation piece 10: Adjustment spring
10a: Adjusting spring tension side contact 10b: Adjusting spring compression side contact
10c: adjustment spring step 10d: adjustment spring bend
10e: bottom of adjustment spring 11: operation drum
12: return drum 12a: first return drum
12c: second return drum 13: return spring
14: operation plate 15: adjustment spring pressing piece
16: Adjustment spring operation piece 17: Lock spring bottom accommodation drum
18: adjustment spring bottom accommodating drum 20: operation lever
21: recess 53: lock spring
58a: 1st lock spring operation piece 58b: 2nd lock spring operation piece
59a: first clutch operating member 59b: second clutch operating member
100 clutch device 200 link mechanism
210: first member 220: second member
300: Ottoman body

Claims (7)

A clutch device interposed between a first member and a second member and for switching a second member to a lock release state and a non-rotatable lock state with respect to the first member,
A lock drum fixed to the first member side;
An output shaft plate fixed to the second member side;
A lock spring fitted inwardly to the lock drum, the lock spring having an outer diameter greater than the inner diameter of the lock drum in a free state;
An adjustment drum disposed inside the lock spring,
The lock spring is formed with a lock spring bent portion that is bent toward the center of the lock spring and a lock spring bottom that is bent from the lock spring bend in the winding forward direction of the lock spring.
A lock spring tension side contact is provided on the side of the lock spring bent portion of the lock spring.
The lock spring compression side contact is provided on the side of the lock spring curved part which enlarges the lock spring.
In the adjustment drum, a lock spring operating piece for pressing the lock spring tension side contact is provided.
A clutch device, comprising: a lock spring pressing piece for pressing the lock spring compression-side contact on an output shaft plate.
The method of claim 1,
A clutch device further provided with a lock spring bottom accommodating drum fitted inwardly to the lock spring and accommodating the lock spring bottom at its outer peripheral surface.
The method of claim 1,
The clutch device of which the lock spring step part is formed in the intermediate part of the lock spring.
The method of claim 1,
An adjustment spring having an outer diameter larger than an inner diameter of the adjustment drum in a free state, which is fitted inwardly to the adjustment drum;
An operation drum disposed inside the adjustment spring;
A return drum fitted inwardly to the adjustment spring;
It is further provided with a return spring for returning the displaced return drum to the initial position,
In the adjustment spring, an adjustment spring step portion formed of an adjustment spring curved portion bent toward the center side of the adjustment spring and an adjustment spring bottom bent in the winding forward direction of the adjustment spring from the adjustment spring curved portion is formed.
An adjustment spring tension side contact is provided on the side of the adjustment spring bent shaft axis.
An adjustment spring compression side contact is provided on the side that enlarges the adjustment spring of the adjustment spring curved part,
In the return drum, an adjustment spring operation piece for pushing the adjustment spring tension side contact is provided.
In the operation drum, an adjustment spring presser for pressing the adjustment spring compression-side contact is provided.
A clutch device adapted to adjust the position of the second member relative to the first member by intermittent movement.
The method of claim 4, wherein
A clutch device further provided with an adjustment spring bottom accommodating drum fitted inwardly to the adjustment spring and accommodating the adjustment spring bottom at its outer peripheral surface.
The method of claim 1,
A clutch device provided with a plurality of recesses in at least one of a portion in contact with the inner circumferential surface of the lock drum on the outer circumferential surface of the lock spring and a portion in contact with the inner circumferential surface of the adjustment drum on the outer circumferential surface of the adjustment spring.
The method according to any one of claims 1 to 6,
The first member and the second member are part of the constituent members of the link mechanism,
A clutch device used for a vehicle ottoman device of a link mechanism, wherein the adjustment drum is a clutch operating member.

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