JP2010005213A - Armrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armrest device capable of alleviating abnormal noise when an armrest is brough into a horizontal using state, that is when a free side hook is lifted by a re-locking cam part, without the need of a special vibration isolation cover. <P>SOLUTION: In the armrest including a fixed shaft fixed to a seat frame, an armrest body to which the fixed shaft is inserted and which is freely rotatably supported, a lock spring, a hook support part, a hook locking part, a plate for a hook, and a cam member provided with an unlocking cam part and the re-locking cam part and provided on the fixed shaft, abnormal noise alleviation means for reducing the abnormal noise generated when the free side hook is lifted from the hook locking part to the hook support part and attached to the outer periphery of the fixed shaft is provided ranging from the hook locking part to the hook support part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a movable armrest that is mounted on a vehicle seat, and more particularly to an armrest that can alleviate noise during a spring terminal release operation in an armrest that can be angle-adjusted steplessly.

  The movable armrest includes a fixed shaft that is fixed to the seat frame, as disclosed in JP-A-2006-192132, JP-A-2007-185223, JP-A-2006-44518, JP-A-2007-558, and the like. An armrest body that is rotatably supported by inserting a shaft, a coiled coil that is wound in close contact with a fixed shaft, one end is locked to the armrest body, and the other end is a free side hook An armrest that has a lock spring and works on the hook on the free side to maintain and release the expanded state of the lock spring to release the lock or make the lock actuated and adjust the angle steplessly is known. It has been.

In the case of releasing the lock, the armrest having such a structure maintains the expanded diameter state of the coil by locking the free side hook of the lock coil spring to, for example, a locking portion. And when returning to the locked state, since the free side hook is unlocked, the free side hook of the lock spring is elastically restored, and noise is generated by the impact.

As a method for alleviating such abnormal noise at the time of locking, Patent Document 1 discloses a method of covering a lock spring with an anti-vibration cover made of rubber or synthetic resin.
However, this method has a problem that an anti-vibration cover is required and the number of steps for attaching the vibration-proof cover is increased.
Patent Document 2 discloses a method for alleviating noise when the free side hook of the lock spring is elastically restored by providing a resin washer.
However, this method also has a problem that the number of parts is increased, such as requiring a resin washer.
JP 2006-44518 A JP 2007-558 A

  The present invention relates to a lock-type armrest device that maintains and releases a diameter-enlarged state of a lock spring having a free-side hook disclosed in the above-mentioned documents and the like, and an abnormal noise generated when the free-side hook of the lock spring is elastically restored. An object of the present invention is to provide an armrest device that can be relaxed without requiring a special anti-vibration cover.

  The armrest device according to the first aspect of the present invention includes an armrest body that is rotatably supported by a fixed shaft, a coil portion wound around the fixed shaft in a close contact state, and a fixed-side hook on one end side of the armrest body. And a coiled lock spring whose other end is a free hook, and the free hook is moved in the axial direction of the fixed shaft so that the coil portion is expanded and contracted. An armrest for rotating and locking the armrest main body, wherein the noise reduction means for reducing noise generated when the coil portion comes into close contact with the fixed shaft by movement of the free hook is the free side. It is provided in the movement area of the hook.

According to a second aspect of the present invention, there is provided an armrest device, a fixed shaft fixed to a seat frame, an armrest main body that is rotatably supported by inserting the fixed shaft, and is wound in close contact with the fixed shaft. Is a fixed hook hooked to the armrest body, a coiled lock spring having the other end as a free hook, and a hook support portion for supporting a state in which the free hook is pulled up in the axial direction of the fixed shaft And a hook plate that is provided so as to stand up from the armrest body, and a free hook on the hook support part that has a hook locking part that expands the diameter of the lock spring by dropping downward in the axial direction of the fixed shaft, When the armrest body is rotated in the storage direction, the free side hook is dropped from the hook support part into the hook engaging part to unlock the lock spring. The unlocking cam portion and the re-locking cam portion that is configured to lift the free-side hook from the hook engaging portion and to be supported by the hook supporting portion when the armrest body is rotated in the unfolding direction and to be locked by a lock spring when the arm release body is rotated in the unfolding direction. In an armrest provided with a cam member provided on a fixed shaft,
The noise reducing means for reducing the noise generated when the free side hook is lifted from the hook locking portion to the hook supporting portion and is brought into close contact with the outer periphery of the fixed shaft is formed from the hook locking portion to the hook supporting portion. It is provided over the range.

  The armrest device according to a third aspect of the invention is characterized in that the noise alleviating means includes one or more stepped contact surfaces.

  The armrest device according to a fourth aspect of the invention is characterized in that the noise alleviating means is an inclined surface that gradually increases.

  The armrest device according to claim 5 is characterized in that the noise alleviating means is a protrusion.

  The armrest device according to claim 6 is characterized in that the noise alleviating means includes a gradually increasing inclined surface and one or more stepped contact surfaces provided on the inclined surface.

  The armrest device according to claim 7 is characterized in that the noise alleviating means is one or a plurality of wavy surfaces.

  The armrest device according to an eighth aspect of the present invention is characterized in that the noise alleviating means includes a concave portion having a size enough to accommodate the surface of the convex portion and the free hook formed continuously on the surface of the convex portion. It is characterized by.

  According to the present invention, when the armrest is in a horizontal use state, that is, when the free-side hook of the lock spring is elastically restored, there is an effect that noise can be mitigated without an anti-vibration cover or a resin washer. .

  Examples of the present invention will be specifically described below.

1 is a front view of the armrest device, FIG. 2 is a rear view of the armrest device, and FIGS. 3 and 4 are a cross-sectional view taken along the line BB and a cross-sectional view taken along the line AA in FIG. 5 shows a rotating plate, FIG. 6 shows a lock spring, and FIG. 7 shows a cam member.
8-16 is explanatory drawing which shows an action | operation, FIG. 17 is a figure which shows the Example of the noise mitigation means provided in the plate 11 for hooks.

The armrest device includes an armrest body 7, a fixed shaft 2, a lock spring 3, a cam member 5, a hook plate 11, and a ring body 21 as shown in FIG.
The armrest body 7 is formed in a horizontally long shape, and a through hole 7a through which the fixed shaft 2 passes is formed on the base end side of the bottom surface.
As shown in FIGS. 3 and 4, the fixed shaft 2 is formed in a cylindrical shape. The fixed shaft 2 includes a large-diameter portion 2c around which the lock spring 3 is wound with a tightening margin, a small-diameter portion 2a integrally formed on one end side of the large-diameter portion 2c, and the other end side of the large-diameter portion 2c. And a fixed convex portion 2d formed integrally with each other. A fixed convex portion 2b is formed at the end of the small diameter portion 2a. The fixed convex portion 2d on the other end side is connected to the cam member 5, and the fixed convex portion 2b on the small diameter portion 2a side is connected to the ring body 21.

  The ring body 21 is fixed to an armrest mounting portion in a seat frame (seat back frame) of a vehicle seat (not shown). As shown in FIGS. 2 and 3, the ring body 21 is formed with a claw portion 21 b that fits and is coupled to a fitting hole formed in the armrest mounting portion. By fitting the claw portion 21b, the ring body 21, the fixed shaft 2 and the cam member 5 are fixed to the armrest mounting portion. A plurality of arc-shaped fixing holes 2a are formed in the ring body 21 on the same circumference. The fixed projection 2b at the end of the fixed shaft 2 is fixed to the fixed hole 2a by means such as press fitting, caulking, and welding, and the fixed shaft 2 and the ring body 21 are integrated. A screw hole 21c is formed in the center portion of the ring body 21, and the ring body 21 is fixed to the armrest mounting portion by inserting a screw (not shown) into the screw hole 21c and screwing it into the armrest mounting portion. .

As shown in FIGS. 3 and 4, a coil spring is used for the lock spring 3. In the free state, the lock spring 3 has an inner diameter slightly smaller than the large-diameter portion 2c of the fixed shaft 2, and is brought into close contact with the large-diameter portion 2c when the large-diameter portion 2c of the fixed shaft 2 is inserted. On both sides of the lock spring 3, a fixed side hook 3a and a free side hook 3b are formed.
The fixed side hook 3 a is locked to a hook fixing member 4 welded to the hook plate 11. For this reason, the hook fixing member 4 is formed with a convex portion 4a into which the fixing side hook 3a is inserted. When the fixed hook 3 a is locked to the hook fixing member 4 on the hook plate 11 side, the entire lock spring 3 rotates together with the hook plate 11. The free side hook 3b is in a free state, and the lock spring 3 is contracted and expanded by moving along the axial direction of the fixed shaft 2 as will be described later.

As shown in FIGS. 3, 4 and 5, the hook plate 11 has a through hole 1a, and the small diameter portion 2a of the fixed shaft 2 is inserted into the through hole 1a. As a result, the hook plate 11 can rotate with respect to the fixed shaft 2. The hook plate 11 is integrated with the armrest body 7 by welding or the like, and the armrest body 7 rotates together with the hook plate 11.
The hook plate 11 is integrally formed with a hook plate 11 that rises in the axial direction of the fixed shaft 2. As shown in FIG. 3, the hook plate 11 has a hook support portion 12 and a hook locking portion 13. The hook support portion 12 abuts on the free side hook 3 b of the lock spring 3, and maintains the state where the free side hook 3 b is pulled up in the axial direction of the fixed shaft 2 by this contact.

  3 and 4 show a state in which the free side hook 3b is supported by the hook support portion 12. FIG. When the free hook 3b is supported by the hook support portion 12, the portion of the lock spring 3 connected to the free hook 3b is pulled up from the other portion, and the lock spring 3 maintains the reduced diameter state, and the lock spring 3b is locked. The spring 3 is locked. When the free side hook 3b is supported on the hook support portion 12, the free side hook 3b is moved to the upper surface of the hook support portion 12 (that is, in FIG. No. 2 cam member 5 side) is always pushed downward. Hereinafter, in this embodiment, “upper” indicates the cam member 5 side of the fixed shaft 2, and “lower” indicates the side opposite to the cam member 5 of the fixed shaft 2 (armrest body 7 side). The fixed shaft 2 has a length that allows the movement of the lock spring 3 accompanying the upward movement of the free hook 3b.

The hook locking portion 13 of the hook plate 11 is dropped from the hook support portion 12 in a groove shape, and the free side hook 3b of the lock spring 3 is dropped. When the free hook 3b falls, the lock spring 3 expands in diameter, and the lock spring 3 is unlocked.
As shown in FIGS. 1, 3 and 7, the cam member 5 has a plurality of arc-shaped fixing holes 5a formed on the same circumference, and the fixing protrusion 2d of the fixing shaft 2 is press-fitted and applied to the fixing hole 5a. It is fixed by means such as fastening and welding. Thereby, the cam member 5 and the fixed shaft 2 are connected, and the cam member 5 is in a fixed state.

  On the outer peripheral side of the cam member 5, an unlocking cam portion 5 b and a relocking cam portion 5 c are formed apart from each other in the rotation direction of the armrest body 7. The unlocking cam portion 5b abuts on the free side hook 3b of the lock spring 3 supported by the hook support portion 12, and acts so that the free side hook 3b is detached from the hook support portion 12 and falls into the hook locking portion 13. . Accordingly, the lock release cam portion 5b releases the lock of the lock spring 3. The surface with which the unlocking cam portion 5b abuts on the free side hook 3b extends in the axial direction of the fixed shaft, and the height thereof is substantially the same as the surface of the hook support portion 12 that supports the free side hook 3b. Yes.

The re-lock cam portion 5 c acts so that the free side hook 3 b is lifted from the hook locking portion 13 and the free side hook 3 b is supported by the hook support portion 12. Therefore, the re-lock cam portion 5c puts the lock spring 3 in the locked state. In order to lift the free hook 3b, the relock cam portion 5c is inclined. That is, a tongue-like slope that easily lifts the free hook 3b from the hook engaging portion 13 is formed on the surface where the relock cam portion 5c contacts the free hook 3b.
More specifically, the surface where the re-lock cam portion abuts on the free side hook 3b is formed with an inclination that approaches the free side hook 3b toward the tip.
A concave portion 5 d that fits inside the fixed shaft 2 is formed in the central portion of the cam member 5.
A screw hole 5e is formed in the central portion of the recess 5d, and a screw (not shown) is inserted into the screw hole 5e, whereby the entire fixed shaft 2 is fixed to the armrest mounting portion.

  Next, the operation of this embodiment will be described with reference to FIGS. In these drawings, an arrow S is a storage direction in which the armrest device is stored on the seat back side, an arrow T is a deployment direction in which the armrest device is pulled out from the seat back, “◯” is rotatable, and “×” is not rotatable. It shows that. In each figure, (a) shows the movement of the free hook 3b with respect to the hook plate 11, and (b) shows the movement of the free hook 3b as the armrest body rotates.

  8 to 10 show the operation in the angle range where the armrest device is used, and shows the lock operation state of the armrest device. In these drawings, the rotation of the armrest body 7 in the direction of the arrow S is a direction in which the diameter of the lock spring 3 increases, so that the armrest body 7 can be rotated with a light force. On the other hand, the rotation direction in the direction of the arrow T is the direction in which the lock spring 3 is reduced in diameter and the fixed shaft 2 is tightened, so that the rotation of the armrest body 7 in the direction of the arrow T is locked. Held in position. Therefore, the angle adjustment of the armrest main body 7 can be performed steplessly. At this time, the hook support portion 12 allows the expansion / contraction diameter of the lock spring 3 and does not hinder the movement of the free-side hook 3b in the direction in which the lock spring 3 expands / contracts.

  In the angular position of FIG. 10, the unlocking cam portion 5b of the cam member 5 is in a position where it abuts on the free hook 3b. When the armrest body 7 is further rotated from this position in the direction of arrow S, the unlocking cam portion 5b pushes the free side hook 3b on the hook support portion 12 in the direction in which the lock spring 3 expands (or turns). As shown by the arrow in FIG. 15, the free side hook 3b falls into the hook locking portion 13 and the fitted state is maintained. That is, since the free side hook 3b of the lock spring 3 is supported by the hook support portion 12 and pulled upward in the axial direction of the fixed shaft 2, the free side hook 3b itself engages with the hook locking portion 13 by the reaction force. And the state is maintained. This state is nothing but a state in which the lock spring 3 is expanded in diameter and the unlocked state is maintained. In this state, the armrest body 7 can be rotated in both directions of arrows S and T. Then, the armrest body 7 is further rotated in the direction of the arrow S to reach the storage position of FIG.

When the armrest body 7 is rotated in the unfolding direction indicated by the arrow T from the storage position of FIG. 12, the states of FIG. 13, FIG. 14, FIG. 15, and FIG. The rotation of the armrest body 7 in the unfolding direction is such that the lock spring 3 is expanded in diameter by the free-side hook 3b fitting into the hook engaging portion 13, and the lock spring 3 is unlocked. It can be rotated in both directions.
FIG. 16 shows the lowermost position of the armrest body 7. When the armrest body 7 is rotated in the direction of arrow T to this position, the re-locking cam portion 5 c of the cam member 5 lifts the free side hook 3 b from the hook engaging portion 13. Accordingly, the free hook 3 b is disengaged from the hook locking portion 13 and is supported by the hook support portion 12. Thereby, the lock operation state of FIG. 12 is achieved, and the same stepless angle adjustment as described above can be performed.
In such an embodiment, the coil portion of the lock spring 3 is reduced in diameter, and the free side hook 3b is pulled up in the axial direction of the fixed shaft 2 and supported by the hook support portion 12, whereby the lock spring 3 is locked. It becomes a state.
When shifting from FIG. 15 to FIG. 16, that is, when the armrest body 7 reaches the lowermost position, the lock spring 3 is reduced in diameter and is brought into close contact with the outer periphery of the fixed shaft 2. .

FIG. 17 is a diagram illustrating a state in which the free side hook 3b is lifted from the hook engaging portion 13 to the hook supporting portion 12 in the hook plate 11 illustrated in FIG.
FIG. 17A shows a case where there is no noise alleviating means. In this case, the free side hook 3b scoops up the side wall of the hook engaging portion 13 and then reaches the reduced diameter position due to the elastic force of the lock spring 3 at the moment when it reaches the surface of the hook supporting portion 12 and generates an abnormal noise. generate.
(B)-(g) shows an embodiment of the noise alleviating means, in which the free side hook 3b is given a return resistance in the movement region of the free side hook 3b from the unlocked state to the locked state.
(B) shows an example of the noise alleviating means of Example 1, which has one or more stepped contact surfaces.
In the embodiment, after the height of transition from the side wall of the hook locking portion 13 to the hook support portion 12 is lowered and the free side hook 3b is once placed on the horizontal hook support portion 12, a step is provided on the surface, It is placed again on the horizontal hook support 12.
The diameter reduction speed of the lock spring 3 is reduced by the amount of the free side hook 3b scooping up the stepped surface, the impact is relaxed, and noise is reduced.

(C) is the noise alleviation means of the second embodiment, in which an inclined surface is formed on the hook support portion 12 so as to gradually increase as the distance from the side wall of the hook locking portion 13 increases, and the free side hook 3b is inclined. In order to scoop up the surface of the hook support portion 12 having a surface, the time for the lock spring 3 to reach the reduced diameter position is slightly longer, and the impact is alleviated by that amount, and the noise is reduced.
(D) is the noise alleviating means of the third embodiment. A protrusion is provided on the hook support portion 12, and the diameter reduction speed of the lock spring 3 is reduced by the amount that the free hook 3b scoops up the surface of the protrusion. Is alleviated and noise is reduced.
(E) is the noise alleviating means of the fourth embodiment, and the inclined surface formed on the hook supporting portion 12 and one or more provided on the inclined surface so as to gradually increase as the distance from the hook engaging portion 13 increases. An example of the noise alleviation means including a stepped contact surface of steps is shown.
Since the free side hook 3b climbs up the surface of the hook support part 12 having the inclined surface, it takes a little time for the lock spring 3 to reach the reduced diameter position, and the free side hook 3b needs to climb up the stepped surface. Therefore, the diameter reduction speed of the lock spring 3 is reduced, the impact is alleviated, and the noise is considerably reduced.

(F) shows an example of the noise alleviation means of Example 5, which has one or more corrugated surfaces.
The fifth embodiment has two peaks and two valleys in the hook support portion 12, and the speed of diameter reduction is reduced each time the mountains are climbed up, the impact is relaxed, and the noise is reduced.
(G) is the noise alleviating means of the sixth embodiment, in which the surface of the convex portion and the concave portion large enough to fit the free side hook 3b are provided on the surface of the convex portion.
The free-side hook 3b creeps up the convex part and decelerates and then fits into the concave part. The free side hook 3b is decelerated greatly before it escapes from the concave part again, and reaches the reduced diameter position.

It is a front view of the armrest apparatus in one embodiment of the present invention. It is a rear view of an armrest apparatus. It is the BB sectional view taken on the line in FIG. It is the sectional view on the AA line in FIG. (A) is a side view of a hook plate, (b) is a plan view, and (c) is a side view. (A) is a side view of a lock spring, (b) is a bottom view. (A) is a side view of a cam member, (b) is a top view. (A), (b) is explanatory drawing explaining angle adjustment. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is explanatory drawing which shows the state following FIG. It is a figure which shows the Example of the noise reduction means provided in the plate for hooks.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating plate 2 Fixed shaft 3 Lock spring 3a Fixed side hook 3b Free side hook 5 Cam member 5b Unlocking cam part 5c Relock cam part 7 Armrest body 11 Hook plate 12 Hook support part 13 Hook latching part 15 Spacer 17 Hook calling Part 18 Inclined guide surface 19 Inclined holding surface

Claims (8)

An armrest body that is rotatably supported by a fixed shaft, a coil portion is wound in close contact with the fixed shaft, a fixed-side hook on one end side is locked to the armrest body, and a free-side hook is formed on the other end side. An armrest that rotates and locks the armrest body by expanding and reducing the diameter of the coil portion by moving the free hook.
An armrest characterized in that an abnormal noise mitigating means for mitigating an abnormal noise generated when the coil portion comes into close contact with the fixed shaft by the movement of the free hook is provided in a moving area of the free hook. A fixed shaft fixed to a seat frame, an armrest body that is rotatably supported by inserting the fixed shaft, and a fixed side that is wound in close contact with the fixed shaft and has one end locked to the armrest body The hook, the coiled lock spring with the other end being a free side hook, the hook supporting part that supports the state where the free side hook is pulled up in the axial direction of the fixed shaft, and the free side hook on the hook supporting part are fixed. A hook locking part that expands the diameter of the lock spring by dropping downward in the axis line of the shaft, and a hook plate provided to rise from the armrest body, and when the armrest body is rotated in the storage direction, Unlocking cam part and armrest book that unlocks the lock spring by dropping the free side hook from the hook support part into the hook engaging part And a cam member provided on the fixed shaft having a re-locking cam portion that lifts the free-side hook from the hook engaging portion and supports the hook supporting portion to be locked by a lock spring when rotated in a deploying direction. In an armrest provided with
The noise reducing means for reducing the noise generated when the free side hook is lifted from the hook locking portion to the hook supporting portion and is brought into close contact with the outer periphery of the fixed shaft is formed from the hook locking portion to the hook supporting portion. An armrest characterized by being provided over the space.   The armrest according to claim 1 or 2, wherein the noise alleviating means includes one or more stepped contact surfaces.   The armrest according to claim 1, wherein the noise alleviating means is an inclined surface that gradually increases.   The armrest according to claim 1, wherein the noise alleviating means is a protrusion.   3. The armrest according to claim 1, wherein the noise alleviating means includes a gradually increasing inclined surface and one or more stepped contact surfaces provided on the inclined surface. 4.   The armrest according to claim 1 or 2, wherein the noise alleviating means is one or a plurality of wavy surfaces. The said abnormal noise alleviating means includes a concave portion having a size enough to accommodate the surface of the convex portion and the free hook formed continuously on the surface of the convex portion. Armrest.

Images