JP2017099436A - Armrest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest device capable of preventing unintended displacement of a locked armrest.SOLUTION: A stopper part 61 of an engagement part 60 provided on an operation member 40 or a lock gear 30, regulates an initial position of the operation member 40. In a state where the lock gear 30 is engaged, the engagement of the lock gear 30 is maintained until the operation member 40 is operated and an engagement object part 36 is engaged with a release part 63. Even when the operation member 40 is rotated in a second direction B by an excessive load applied to an armrest 11, the armrest device includes the engagement object part 36 and a relief 62 in a disengaged state, so that the engagement of the lock gear 30 can be maintained until the engagement object part 36 is engaged with the release part 63.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an armrest device, and more particularly to an armrest device that can prevent unintended displacement of a locked armrest.

  There are seats with armrests that support the arm of the occupant. In such a seat, there is known an armrest device that can be placed in a lying state in which the armrest supports the arm of the seated person or in an upright state in which the armrest is housed on the side surface of the seat (Patent Document 1). Patent Document 1 discloses an armrest device that includes a link that is displaced along with an armrest, a shaft lock mechanism that restricts the displacement of the link, and the shaft lock mechanism includes a coiled spring. The coiled spring is rewound when the armrest is in the standing state and is in a free state, and is wound and locked when the armrest is in the lying down state. Therefore, the armrest device uses the coiling spring's winding force. The armrest can be locked at any angle.

Japanese Utility Model Publication No. 7-39611

  However, in the above conventional technique, when an excessive load is applied to the locked armrest, the armrest may be unintentionally displaced.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an armrest device that can prevent unintended displacement of a locked armrest.

Means for Solving the Problems and Effects of the Invention

  In order to achieve this object, according to the armrest device of the first aspect, the armrest is rotatably disposed around the main shaft fixed to the seat frame, and the fixed gear is fixed to the main shaft so as not to rotate around the main shaft. Is done. A lock gear that meshes with the fixed gear is fixed to the armrest so that the gear shaft can rotate, and a first spring applies an urging force around the gear shaft that meshes with the fixed gear to the lock gear. The operation member is fixed to the armrest by the operation shaft so that the operation member can be rotated around the operation shaft, and the second spring applies an urging force to rotate the operation member in the first direction around the operation shaft. An engagement portion is provided on one of the operation member and the lock gear, and an engaged portion that engages with the engagement portion is provided on the other of the operation member or the lock gear.

  The engaging portion restricts the initial position of the operating member in the first direction by the stopper portion engaging with the engaged portion by the urging force of the second spring. When the operation member rotates in the second direction around the operation axis opposite to the first direction, the release portion engages with the engaged portion and rotates the lock gear around the lock gear shaft to remove the lock gear from the fixed gear. Since the escape portion formed between the stopper portion and the release portion in the second direction is not engaged with the engaged portion, the operating member rotates in the second direction when the lock gear is engaged with the fixed gear. Until the engaged portion engages with the release portion, the state in which the lock gear meshes with the fixed gear is maintained, and the armrest cannot be displaced (locked). Even if the operating member rotates in the second direction due to an excessive load applied to the locked armrest, there is an escape portion, so that the lock gear becomes a fixed gear until the engaged portion engages with the release portion. The meshing state is maintained. Therefore, there is an effect that an unintended displacement of the locked armrest can be prevented.

  According to the armrest device of the second aspect, the escape portion is formed inside or outside in the radial direction with the operation shaft or the gear shaft as the center with respect to the engaged portion engaged with the stopper portion. It is possible to prevent excessive play until the engaged portion engages with the engaging portion. Therefore, in addition to the effect of the first aspect, there is an effect that it is possible to prevent a long response time from the operation of the operation member until the lock gear is released.

  According to the armrest device of the third aspect, since the engaging portion is formed on the opposite side in the radial direction around the operation shaft or the gear shaft with respect to the escape portion, the engaging auxiliary portion When the is engaged with the engaged portion, the lock gear can be displaced in the direction of meshing with the fixed gear. Since the distance in the radial direction between the engaged portion engaged with the stopper portion and the engagement assisting portion is smaller than the distance in the radial direction between the engaged portion engaged with the stopper portion and the escape portion, the locked armrest When an excessive load is applied to the engagement assisting portion, the engagement assisting portion can be easily engaged with the engaged portion. Therefore, in addition to the effect of the first or second aspect, there is an effect that the lock gear can be displaced in a direction in which the lock gear is hardly detached from the fixed gear.

It is a side view of the armrest apparatus in a 1st embodiment of the present invention. It is an exploded three-dimensional view of an armrest device. It is a side view which shows the inside of an armrest apparatus. It is an enlarged view of an armrest apparatus. It is an enlarged view of an armrest apparatus. It is an enlarged view of an armrest apparatus.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the seat 1 in which the armrest device 10 is arranged will be described with reference to FIG. The seat 1 includes a seat cushion 2 on which a seated person sits down, a seat back 3 that serves as a backrest for the seated person, and an armrest 11 on which the seated person places his arm. The armrest 11 is a seat that can be rotated between the use position (falling position) where the seated person puts his / her arm and the storage position (standing position) stored when the seated person does not use the armrest device 10. Attached to the side of the back 3. The storage position is a position where the armrest 11 and the side surface of the seat back 3 overlap. In the present embodiment, the seat 1 is mounted on a vehicle body (not shown).

  The armrest device 10 will be described with reference to FIG. FIG. 2 is an exploded view of the armrest device 10. The seat frame 4 shown in FIG. 2 is a part of a large seat frame that supports the seat back 3 (see FIG. 1).

  The armrest device 10 is a device that is accommodated in a hard base 15, a hard cover 16, and a lid 17, and these are covered with a flexible cushion of the armrest 11. The armrest device 10 includes a fixed gear 20 whose position with respect to the seat back 3 is fixed, a lock gear 30 that meshes with the fixed gear 20, an operation member 40 that operates the lock gear 30, and a strap 50 that operates the operation member 40. Yes.

  The fixed gear 20 is fixed to the main shaft 14 that passes through the base 15. The main shaft 14 is a male shaft fastened to the female shaft 13 fixed to the seat frame 4 and is fixed to the female shaft 13 so as not to rotate by a pin (not shown). The main shaft 14 passes through a hole 21 formed in the center of the fixed gear 20 and the fixed gear 20 is fixed to the main shaft 14 so as not to rotate, whereby the fixed gear 20 is fixed to the seat back 3 (see FIG. 1). .

  The lock gear 30 is a gear whose rotation shaft (gear shaft 31) is fixed to the base 15. The lock gear 30 rotates around the gear shaft 31 to switch between a state in which the fixed gear 20 and the lock gear 30 are engaged and a state in which the lock gear 30 is not engaged. In the present embodiment, the engaged portion 36 is provided in the lock gear 30. The operation member 40 is a plate-like member whose rotation shaft (operation shaft 41) is fixed to the base 15. In the present embodiment, an engagement portion 60 that engages with the engaged portion 36 is provided. Yes. When the engaged portion 36 engages with the engaging portion 60, the rotation of the operation member 40 is transmitted to the lock gear 30.

  The strap 50 is a string-like member that releases the locked state of the armrest 11. The strap 50 has a first end attached to the operation member 40 by a pin 51, a second end extending along the base 15, and a hole (not shown) formed in the lid 17 attached to the end of the base 15. ) To the outside of the armrest 11. When the seated person pulls the strap 50 coming out of the armrest 11, the operation member 40 rotates around the operation shaft 41, and the lock gear 30 rotates due to the engagement between the engagement portion 60 and the engaged portion 36. As a result, when the meshing between the fixed gear 20 and the lock gear 30 is released, the locked state of the armrest 11 is released, and the armrest 11 can be rotated about the main shaft 14.

  With reference to FIG. 3, the detailed structure of the armrest apparatus 10 is demonstrated. FIG. 3 is a side view showing the inside of the armrest device 10. The main shaft 14 that fixes the fixed gear 20 is fixed at a position that is about a half of the height of the base 15 (dimension in the direction perpendicular to the axis, the vertical dimension in FIG. 3). The fixed gear 20 has a plurality of gear teeth 22 formed on the edge on the lock gear 30 side. The gear teeth 22 are portions where the gear teeth 35 formed on the lock gear 30 mesh with each other. Since the gear teeth 22 having a predetermined circumferential length are formed on the fixed gear 20, the angle of the base 15 with respect to the horizontal plane can be arbitrarily changed within a range in which the gear teeth 22 and 35 are engaged with each other.

  The lock gear 30 is a plate-like member in which the first arm 32 and the second arm 34 extend on both sides around the gear shaft 31, and the edge facing the fixed gear 20 has a circular shape to avoid interference with the fixed gear 20. It is formed in an arc shape. Since the first arm 32 has substantially the same length as the second arm 34, the center of gravity of the lock gear 30 is set at substantially the same position as the gear shaft 31. As a result, the lock gear 30 can be prevented from rotating due to the moment of inertia around the gear shaft 31 generated when the automobile collides, so that the engagement between the lock gear 30 and the fixed gear 20 can be prevented from being disengaged by an impact such as a collision. .

  The lock gear 30 is provided with a locking portion 33 near the tip of the first arm 32, and an engaged portion 36 and a plurality of gear teeth 35 are provided near the tip of the second arm 34. The engaged portion 36 is a rod-shaped outer edge that protrudes from the lock gear 30 in the thickness direction of the lock gear 30 (the vertical direction in FIG. 3). The locking part 33 is a part to which the first end of the spring 70 is attached. The spring 70 is a member (first spring) for urging the lock gear 30 around the gear shaft 31 in the direction in which the gear teeth 22 and 35 mesh (clockwise in FIG. 3). In this embodiment, the spring coil It is a spring. The gear shaft 31 is aligned in the axial direction (left and right direction in FIG. 3) with respect to the main shaft 14 and is about ½ of the height of the base 15 (dimension in the direction perpendicular to the axis, vertical dimension in FIG. 3). Fixed in position.

  The operation member 40 is a plate-like member in which the first arm 42 and the second arm 44 extend on both sides of the operation shaft 41, and a locking portion 43 is provided near the tip of the first arm 42. An engaging portion 60 is provided near the tip of 44. The operating member 40 has a strap 50 connected to the tip of the first arm 42 by a pin 51. The position of the strap 50 in the base 15 is supported or restricted by the support body 52 fixed to the base 15.

  The locking part 43 is a part to which the second end of the spring 70 is attached. The spring 70 is a member (second spring) that urges the operation member 40 about the operation shaft 41 in a direction (counterclockwise in FIG. 3) that prevents the rotation of the operation member 40 that rotates when the strap 50 is pulled. is there. When the strap 50 is pulled and the spring 70 extends, the spring 70 urges the lock gear 30 in the direction in which the gear teeth 22 and 35 mesh (clockwise in FIG. 3). Since one spring 70 biases the two members of the lock gear 30 and the operation member 40, the number of parts can be reduced as compared with the case where springs that bias the two members are provided.

  Since the first arm 42 operated by the strap 50 is longer than the second arm 44 in the operation member 40, the seated person can rotate the operation member 40 with less force. Since the first arm 42 longer than the second arm 44 is disposed in the base 15, the operation member 40 has the operation shaft 41 fixed near the top of the base 15 (the end in the direction perpendicular to the axis), and the second arm 44 is The arm 42 is disposed at an angle. As a result, the operation shaft 41 of the operation member 40 is disposed near the top of the base 15 (the end in the direction perpendicular to the axis), and the gear shaft 31 of the lock gear 30 is disposed near the center of the base 15 in the direction perpendicular to the axis. The operating shaft 41 is located on the opposite side of the main shaft 14 with respect to the gear shaft 31.

  The engaging part 60 is a part for restricting the position of the operating member 40 with respect to the lock gear 30 while transmitting the displacement of the operating member 40 to the lock gear 30 by engaging with the engaged part 36. In the present embodiment, the engaging portion 60 is the inner edge of a hole that penetrates the operation member 40 in the thickness direction (the direction perpendicular to the plane of FIG. 3).

  With reference to FIG. 4 to FIG. 6, the structure of the engaging portion 60 and the method of using the armrest device 10 will be described. 4 to 6 are enlarged views of the armrest device 10. Note that arrows A and B in FIG. 4 indicate the rotation direction of the operation member 40. Arrow A indicates a first direction (counterclockwise in FIG. 4) centered on the operation shaft 41, and arrow B indicates a second direction (clockwise in FIG. 4) centered on the operation shaft 41 (from FIG. 5). Same in FIG. 7).

  As shown in FIG. 4, the engaging portion 60 is formed with a stopper portion 61, a relief portion 62, a releasing portion 63, and an engagement assisting portion 64 in order counterclockwise in FIG. 4. The stopper portion 61 abuts on the engaged portion 36 in a state where the lock gear 32 is engaged with the fixed gear 20 and no force in the second direction B is applied to the operation member 40 by the strap 50. This is a part that regulates the position (hereinafter referred to as “initial state”). The stopper portion 61 is substantially orthogonal to a virtual circle C (a circle having the maximum diameter among circles passing through the outer edge of the engaged portion 36) passing through the outer edge of the engaged portion 36 at the initial position with the operation shaft 41 as the center. . That is, the stopper 61 has a pressure angle with respect to the relative movement direction of the engaged portion 36 substantially set to 0 °. The stopper portion 61 is inclined so as to approach the main shaft 14 side (lower side in FIG. 4) in the direction perpendicular to the axis as it goes from the operation shaft 41 toward the main shaft 14 side in the axial direction (right side in FIG. 4).

  The lock gear 30 is biased in the direction in which the lock gear 30 meshes with the fixed gear 20 by the spring 70 and the position thereof is regulated, and the operation member 40 is biased in the first direction A, so that the stopper portion 61 comes into contact with the engaged portion 36. As a result, the position of the operation member 40 is regulated. Since the stopper portion 61 is substantially orthogonal to the straight line connecting the gear shaft 31 and the engaged portion 36, the stopper portion 61 applies a rotational force for disengaging the fixed gear 20 via the engaged portion 36. The lock gear 30 is not generated. Since the spring 70 biases the lock gear 30 in the direction in which the gear teeth 22 and 35 mesh (clockwise in FIG. 4), the spring 70 can be prevented from being unlocked unintentionally.

  The escape portion 62 is a concave depression that is connected to the stopper portion 61 and is located outside the virtual circle C, and is located outside the stopper portion 61 in the radial direction with the operation shaft 41 as the center. Since the escape portion 62 is outside the virtual circle C, it cannot be engaged with the engaged portion 36.

  The release part 63 is a part located on the opposite side of the escape part 62 across the intersection D between the virtual line C and the engaging part 60. Since the release portion 63 is inside the virtual circle C, when the operating member 40 rotates in the second direction B and the engaged portion 36 contacts the release portion 63, the release portion 63 causes the engaged portion 36 to move. Thus, the lock gear 30 is caused to generate a rotational force that disengages the fixed gear 20.

  The engagement assisting portion 64 is a portion that is connected to the stopper portion 61 and is located inside the virtual circle C, and is located on the inner side in the radial direction around the operation shaft 41 with respect to the stopper portion 61. The engagement assisting portion 64 is formed in a curved shape or a straight shape substantially parallel to the virtual circle C. The engagement assisting portion 64 is provided with a gap between the engaged portion 36 engaged with the stopper portion 61 and the engagement assisting portion 64 in order to prevent interference with the engaged portion 36 at the initial position. . The distance between the engaged portion 36 engaged with the stopper portion 61 and the engagement assisting portion 64 (the distance in the radial direction of the virtual circle C) is determined between the engaged portion 36 engaged with the stopper portion 61 and the escape portion 62. (The distance in the radial direction of the virtual circle C).

  As shown in FIG. 5, when a seated person (not shown) pulls the strap 50 and rotates the operating member 40 in the second direction B against the tensile force of the spring 70, the engaged portion 36 is released from the release portion. 63 (engagement portion 60). At this time, the lock gear 30 is greatly urged in the direction of meshing with the fixed gear 20 (clockwise in FIG. 5) by the tensile force of the spring 70. Since the engaged portion 36 engages with the release portion 63, the urging force that acts on the lock gear 30 by the spring 70 acts on the strap 50 in addition to the urging force that acts on the operating member 40 by the spring 70.

  As shown in FIG. 6, when the strap 50 is further pulled against the urging force of the spring 70 and the operation member 40 is rotated in the second direction B, the release portion 63 causes the lock gear 30 to be moved via the engaged portion 36. Rotate in a direction to remove from the fixed gear 20 (counterclockwise in FIG. 6). When the lock gear 30 is disengaged from the fixed gear 20, the seated person can freely rotate the base 15 (armrest 11) around the main shaft 14 while pulling the strap 50.

  Since the lock gear 30 is moved using the operation member 40, the force that the seated person must apply to release the lock can be reduced as compared with a case where the lock gear 30 is moved directly without the operation member 40. Therefore, operability can be improved. Further, since the urging force of the spring 70 for meshing the lock gear 30 with the fixed gear 20 can be increased by the amount by which the force applied by the seated person can be reduced, the lock gear 30 can be prevented from coming off from the fixed gear 20.

  Returning to FIG. The base 15 (armrest 11) extends long in a direction (left and right direction in FIG. 3) perpendicular to the axial direction of the main shaft 14 (perpendicular direction in FIG. 3). In the armrest device 10, the operation shaft 41 of the operation member 40 is disposed near the top (end) of the base 15, and the gear shaft 31 of the lock gear 30 is disposed near the center of the base 15. Since the gear shaft 31 and the operation shaft 41 are fixed to the base 15 at different positions in the axial direction (left-right direction in FIG. 3), a large load in the torsional direction with the axial direction of the base 15 (armrest 11) as an axis is applied to the base 15. If the strap 50 is not operated, the base 15 is elastically deformed (torsional deformation) and the operating member 40 is relatively displaced relative to the lock gear 30 in the axial direction and the direction perpendicular to the axis (vertical direction in FIG. 3). Sometimes.

  Referring to FIG. 4, a load in the torsional direction centering on the axial direction of base 15 (the left-right direction in FIG. 4) acts on base 15, and operation member 40 is moved axially and perpendicularly to lock gear 30. A case of relative displacement in the vertical direction of FIG. 4 will be described. The load in the torsional direction is such that the force in the second direction B is not applied to the operation member 40 by the strap 50, and the initial position of the operation member 40 in which the stopper portion 61 is in contact with the engaged portion 36 (the lock gear 30 is It shall act when in a state of being engaged with the fixed gear 20. Although the strap 50 is not operated, if the operation member 40 is displaced relative to the lock gear 30 and the lock gear 30 is detached from the fixed gear 20, the armrest 11 rotates around the main shaft 14 unintentionally. Whether this occurs will be described for each direction in which the operating member 40 is displaced with respect to the lock gear 30 (here, four directions).

  When the operating member 40 is relatively displaced with respect to the lock gear 30 in the direction perpendicular to the axis of the base 15 (upper side in FIG. 4), the stopper portion 61 approaches the main shaft 41 toward the main shaft 14 side in the axial direction (right side in FIG. 4). Therefore, an axial component force that pushes the engaged portion 36 toward the main shaft 14 acts on the lock gear 30. Since the stopper portion 61 rotates the lock gear 30 in a direction in which the lock gear 30 and the fixed gear 20 are engaged with each other, the lock gear 30 can be hardly detached from the fixed gear 20.

  When the operating member 40 is displaced relative to the lock gear 30 relative to the lower side in the direction perpendicular to the axis of the base 15 (the lower side in FIG. 4), there is the escape portion 62, so the engaged portion 36 is at the release portion 63 (intersection D). Unless it reaches, the operating member 40 cannot transmit force to the lock gear 30. As a result, the lock gear 30 can be prevented from coming off the fixed gear 20.

  When the operation member 40 is displaced relative to the lock gear 30 to the left side in the axial direction of the base 15 (left side in FIG. 4), there is the escape portion 62, so unless the engaged portion 36 reaches the escape portion 62 (edge). The operation member 40 cannot transmit force to the lock gear 30. As a result, the lock gear 30 can be prevented from coming off the fixed gear 20.

  When the operation member 40 is phase-shifted to the right side in the axial direction of the base 15 (right side in FIG. 4) with respect to the lock gear 30, there is the engagement assisting portion 64, so that the force that pushes the engaged portion 36 to the fixed gear 20 Act on. As a result, since the lock gear 30 is rotated in the direction in which the lock gear 30 and the fixed gear 20 are engaged with each other, the lock gear 30 can be hardly detached from the fixed gear 20.

  In addition, since the clearance gap is provided between the to-be-engaged part 36 engaged with the stopper part 61, and the engagement auxiliary | assistant part 64 in the state which this load of the twist direction does not act, 36 and the engagement assisting portion 64 are rubbed against each other, and it is possible to prevent abnormal noise from being generated and the engaged portion 36 and the engagement assisting portion 64 from being worn out.

  As described above, since the escape portion 62 is formed in the engagement portion 60, the state where the lock gear 30 is engaged with the fixed gear 20 is maintained until the engaged portion 36 is engaged with the release portion 63. Therefore, the unintended displacement of the locked armrest 11 can be prevented. Further, since the escape portion 62 is formed on the outer side in the radial direction with the operation shaft 41 as the center with respect to the engaged portion 36 engaged with the stopper portion 61, the engaged portion 36 is engaged with the engaging portion 60 ( It is possible to prevent the play until it engages with the release portion 63) from becoming excessive. Therefore, it is possible to prevent an increase in response time from the operation of the operation member 40 until the lock gear 30 is disengaged.

  Since the engagement portion 60 is formed with an engagement assisting portion 64 on the opposite side in the radial direction around the operation shaft 41 with respect to the escape portion 62, the engagement assisting portion 64 engages with the engaged portion 36. As a result, the lock gear 30 can be displaced in the direction of meshing with the fixed gear 20. When the engaged portion 36 is engaged with the stopper portion 61, the radial distance between the engaged portion 36 and the engagement assisting portion 64 is the radial distance between the engaged portion 36 and the escape portion 62. Since it is smaller, depending on the direction in which the operation member 40 is relatively displaced when an excessive load is applied to the locked armrest 11, the engagement assisting portion 64 can be easily engaged with the engaged portion 36. . Therefore, the lock gear 30 can be displaced in a direction in which the lock gear 30 is difficult to come off from the fixed gear 20.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed. For example, the shape and size of the lock gear 30 and the operation member 40, the positions where the gear shaft 31 and the operation shaft 41 are fixed to the base 15, the shapes of the engaged portion 36 and the engaging portion 60, and the like can be set as appropriate.

  In the above embodiment, the armrest device 10 mounted on an automobile has been described. However, an armrest device for a seat mounted on a vehicle other than an automobile such as a railway vehicle, a vehicle flying in the air, or a vehicle moving on the sea surface or in the sea. Of course, it is possible. Further, the invention is not limited to a vehicle seat, and can naturally be applied to an armrest device for a seat installed in a house or the like.

  In the above embodiment, the case where the engaged portion 36 is provided in the lock gear 30 and the engaging portion 60 is provided in the operation member 40 has been described. However, the present invention is not limited to this, and the engaging portion 60 is provided in the lock gear 30. It is naturally possible to provide the engaged member 36 on the operating member 40. Also in this case, when the operating member 40 is operated, the engaged portion 36 can be engaged with the engaging portion 60, so that the lock gear 30 can be rotated via the engaged portion 36. Therefore, even when the engaging portion 60 is provided in the lock gear 30 and the engaged portion 36 is provided in the operation member 40, the same operation and effect as described in the above embodiments can be realized.

  In the said embodiment, although the case where the engaging part 60 was a hole penetrated in the thickness direction of the operation member 40 was demonstrated, it is not necessarily restricted to this, The hollow which does not penetrate the operation member 40, It is of course possible to make it like a groove.

  In the above embodiment, the case where the spring 70 is configured by the coil spring has been described, but the present invention is not necessarily limited thereto. As long as the lock gear 30 and the operation member 40 can be urged, it is naturally possible to employ a spring other than the coil spring. Examples of other springs include elastic members such as rubber and leaf springs.

  In the above embodiment, the case where the spring 70 serves as both the first spring that biases the lock gear 30 and the second spring that biases the operation member 40 has been described, but the present invention is not necessarily limited thereto. Naturally, it is possible to separately provide a spring (first spring) for urging the lock gear 30 and a spring (second spring) for urging the operation member 40. In this case, as the springs (first spring and second spring), a compression coil spring, a torsion coil spring, or the like can be used in addition to an elastic member such as a tension coil spring or rubber, a leaf spring, or the like.

  Although the case where the operation member 40 is rotated by the strap 50 has been described in the above embodiment, the present invention is not necessarily limited thereto. Of course, a link mechanism configured by combining a plurality of links may be attached to the operation member 40 and the operation member 40 may be configured to rotate when a seated person operates the link mechanism.

DESCRIPTION OF SYMBOLS 4 Seat frame 10 Armrest apparatus 11 Armrest 14 Main shaft 20 Fixed gear 30 Lock gear 31 Gear shaft 36 Engagement part 40 Operation member 41 Operation axis 60 Engagement part 61 Stopper part 62 Escape part 63 Release part 64 Engagement auxiliary part 70 Spring ( 1st spring, 2nd spring)
A 1st direction B 2nd direction

Claims (3)

An armrest arranged to be rotatable around a main shaft fixed to the seat frame;
A fixed gear fixed to the main shaft so as not to rotate around the main shaft;
A lock gear meshing with the fixed gear;
A gear shaft that rotatably fixes the lock gear to the armrest;
A first spring that applies an urging force around the gear shaft to engage the lock gear with the fixed gear;
An operating shaft fixed to the armrest;
An operation member fixed to the operation shaft so as to be rotatable about the operation shaft;
A second spring that imparts an urging force to the operation member to rotate the operation member in a first direction around the operation axis;
An engagement portion provided on one of the operating member or the lock gear;
An engagement portion provided on the other of the operation member or the lock gear, which engages with the engagement portion,
The engaging portion is engaged with the engaged portion by the urging force of the second spring to restrict the initial position of the operating member in the first direction;
The lock member is engaged with the engaged portion by rotation of the operation member in the second direction around the operation axis opposite to the first direction, and the lock gear is rotated about the lock gear axis to move the lock gear from the fixed gear. An armrest device comprising: a releasing portion to be removed; and a relief portion that is formed between the stopper portion and the releasing portion in the second direction and is in a non-engaged state with the engaged portion. .   The escape portion is formed inside or outside in a radial direction with the operation shaft or the gear shaft as a center with respect to the engaged portion engaged with the stopper portion. The armrest device according to 1. The engagement portion includes an engagement assisting portion formed on the opposite side of the radial direction around the operation shaft or the gear shaft with respect to the escape portion,
A radial distance between the engaged portion engaged with the stopper portion and the engagement assisting portion is smaller than a radial distance between the engaged portion engaged with the stopper portion and the escape portion. The armrest device according to claim 1 or 2, characterized in that.

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