JP2005118311A - Armrest turning controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To distribute loads accompanying turning control, to surely execute supporting, to facilitate working, and to lower costs without increasing manufacture processes. <P>SOLUTION: In a turning controller in which an armrest 4 is provided on the side part of the backrest seat of a seat so as to be freely vertically turned by a shaft 7 in a horizontal direction, a backrest bracket 5 having at least a side plate 42 is fixed to the backrest frame 5 of the backrest seat, and a pair of projected lines 46 and 47 having a prescribed length in a circular arcuate shape concentric to the shaft 7 are projected to the outer side and provided at a prescribed interval on the backrest bracket 6. On the armrest frame 8 of the armrest 4, a pair of stopper projections 51 and 52 projected to the backrest frame 5 are provided by changing phases for 180 degrees so as to be moved concentrically to the projected line 46 and the projected line 47 between the projected line 46 and the projected line 47. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotation restricting device for an armrest that is rotatably provided on a side portion of a back seat.

A conventional armrest is pivotally attached to a seat bracket with a shaft by a shaft, and provided with a rotation restricting means comprising a rotating member and an engaging projection engaging with an engaging groove of the rotating member on the shaft and the bracket.
JP-A-63-68115

Since the rotation restricting means of the known example is configured to engage the engagement protrusion with the inner surface of the engagement groove, the engagement portion between the engagement protrusion and the engagement groove is supported at one place. There is a problem that the load applied to the portion increases.
In addition, the rotating member having the engaging groove and the engaging protrusion must be fixed to the dorsal skeleton frame and the armless frame, respectively, which increases the number of work steps and increases the cost.

In the present invention, the structure of the rotation restricting means is devised to disperse the load accompanying the rotation restriction, and the armrest 4 is pivotable up and down by a shaft 7 in the left and right direction on the side portion of the back seat of the seat. The dorsal bracket 6 having at least the side plate 42 is fixed to the dorsal skeleton frame 5 of the dorsal seat, and the dorsal bracket 6 has an arc shape concentric with the shaft 7 and has a predetermined shape. A pair of protruding ridges 46, 47 having a length project outward and are provided at a predetermined interval, and the armrest frame 8 of the armrest 4 has a ridge 46 and a protrusion between the ridge 46 and the ridge 47. An armrest rotation rule configured by providing a pair of stopper protrusions 51 and 52 that protrude toward the dorsal skeletal frame 5 so as to move concentrically with the stripes 47 with a phase difference of 180 degrees. It is obtained by the apparatus.
In the present invention, the stopper protrusion 51 and the stopper protrusion 52 are formed at the both ends in the length direction of the arc-shaped protrusion 46 and protrusion 47 so as to stand substantially perpendicular to the side plate 42, respectively. The armrest rotation restricting device is configured to be engaged with the stopper surface 48 and the standing position stopper surface 49.
The present invention is an armrest rotation restricting device in which a through hole 50 is provided in the side plate 42 where both ends of the protrusion 46 and the protrusion 47 are located.
In the present invention, the dorsal bracket 6 is formed in a box shape having a predetermined volume, and the armrest rotation restricting device is configured by providing the protrusions 46 and 47 on the outer surface of the box-shaped side plate 42. It is.

According to the first aspect of the present invention, the pair of stopper protrusions 51 and the stopper protrusions 52 which are provided with the phase difference of 180 degrees are brought into contact with the end surfaces of the two protrusions 46 and the protrusions 47, respectively. Distribute the load that accompanies and support it securely.
Further, since the protrusion 46 and the protrusion 47 are provided on the outer surface of the side plate 42 of the dorsal bracket 6, the degree of freedom in designing the shape of the dorsal bracket 6 is increased, and any dorsal skeleton frame can be supported. Moreover, since the protrusion 46 and the protrusion 47 are provided in the back bracket 6, it can be formed by press working, and the protrusion 46 and the protrusion 47 can be formed in the manufacturing process of the back bracket 6. Do not increase, lower costs. In addition, since the stopper projection 51 and the stopper projection 52 are provided on a small armrest as compared with the dorsal skeleton frame, processing is easy and the cost is reduced.
In the invention of claim 2, the shape of the ridges 46 and 47 itself acts as a “rib” for preventing the side plate 42 from being deformed, and the load can be firmly supported, resulting in a rational configuration.
According to the third aspect of the present invention, stress concentration during processing can be dispersed by the through holes 50 to prevent generation of cracks, and in particular, it is effective in press processing and can reduce the cost.
In the invention of claim 4, since the dorsal bracket 6 is formed in a box shape, the strength of the dorsal bracket 6 itself is also improved, and the ridge 46 and the ridge are formed on the outer surface of the dorsal bracket 6 formed in the box shape. 47 is provided, the member of the stopper mechanism does not protrude into the dorsal bracket 6, and the locking device L that adjusts the armrest to an arbitrary height can be accommodated in the dorsal bracket 6. .

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 5 denotes a dorsal skeleton frame of a dorsal seat for a vehicle or the like, and a dorsal bracket 6 is provided on a side portion of the dorsal skeleton frame 5. The base portion of the armrest frame 8 of the armrest 4 is attached to the dorsal bracket 6 by a shaft 7 in the left-right direction so as to be rotatable up and down.
The present application has a gist of an attachment structure for attaching the armrest 4 to the back bracket 6 and will be described below.
The dorsal bracket 6 is formed to have at least an outer side plate 42. In the embodiment, the outer side plate 42 is formed in a box shape having a predetermined volume integrally with the front and rear plates 40 and the upper and lower plates 41, and at a predetermined position. The provided mounting portion 43 is brought into contact with the side surface of the dorsal skeleton frame 5 and fixed by a fastening tool 44 such as a bolt.

The outer side plate 42 is formed with a through hole 45 for projecting a distal end of a fixing collar 10 of the locking device L described later. A pair of arc-shaped protrusions 46 and 47 concentric with the through-hole 45 are provided on the outer side plate 42 around the through-hole 45 at a predetermined interval.
Each of the first and second ridges 46 and 47 is formed so as to protrude outward from the outer side plate 42, and the end surfaces of the ridges 46 and 47 are raised at a substantially right angle with respect to the outer side plate 42. Formed on surfaces 48 and 49.

  In this case, the ridges 46 and the ridges 47 are formed by pressing in the manufacturing process of the back bracket 6, and the end surfaces of the ridges 46 and the ridges 47 are cut and substantially perpendicular to the outer side plate 42. It is preferable that the protrusions 46 and 47 are formed separately on the stopper surfaces 48 and 49 because a step of forming the protrusions 46 and 47 is unnecessary.

Thus, the stopper surface 48 of the ridge 46 and the stopper surface 48 of the ridge 47 are arranged 180 degrees out of phase, and similarly, the stopper surface 49 of the ridge 46 and the stopper surface 49 of the ridge 47 are 180 degrees. Arrange the phase.
Reference numeral 50 denotes a through-hole formed to allow the press die to escape during press working, whereby the stopper surface 48 and the stopper surface 49 are erected substantially perpendicularly to the side plate 42 at both ends of the protrusion 46. It becomes easy.

  Thus, the armrest frame 8 of the armrest 4 is provided with a pair of stopper protrusions 51 and 52 that protrudes toward the dorsal skeleton frame 5 concentrically with the protrusions 46 and 47, with a phase difference of 180 degrees. When the armrest 4 is in the use position where the armrest 4 protrudes to the front side, the stopper protrusion 51 and the stopper protrusion 52 abut against the use position stopper surfaces 48 of the protrusion 46 and the protrusion 47 to further rotate the armrest 4 downward. regulate.

Further, the stopper projection 51 and the stopper projection 52 are in contact with the standing position stopper surfaces 49 of the protrusion 46 and the protrusion 47 when the armrest 4 is in the standing position, and above the armrest 4 above (rearward). ) Restricts rotation.
Therefore, the protrusion 46 and protrusion 47 provided on the dorsal bracket 6 and the stopper protrusion 51 and stopper protrusion 52 provided on the armrest frame 8 constitute a rotation restricting means S that restricts excessive rotation of the armrest 4.

Thus, when the dorsal bracket 6 is formed in a box shape, the rotation restricting means S is provided with the protrusion 46 and the protrusion 47 on the back bracket 6, while the stopper protrusion 51 and the stopper protrusion 52 are always provided with the armrest frame. 8 is provided.
That is, the protrusion 46 and the protrusion 47 are provided on the dorsal bracket 6 and are provided on the outer side plate 42 so as to protrude outward. Can be used.

In the present embodiment, a locking device L that holds the height of the armrest 4 at an arbitrary position is built in the dorsal bracket 6.
The locking device L holds the armrest 4 at an arbitrary height position, and its configuration is arbitrary, but an example of the locking device L will be shown below. The locking device L locks the downward rotation of the armrest 4 in the range of use originally used as the armrest 4 to support the load, and allows only the upward rotation to be adjustable in height so that the upper limit of the range of use can be adjusted. In the storage range that is the same as the position or spaced apart from it, it is unlocked and can be turned up and down, and it can be turned downward from the storage range to the lowest position of the use range. It is preferable that the armrest 4 is easily adjusted in height by returning to the lockable state and allowing only upward rotation in the range of use.

  Reference numeral 10 denotes a fixing collar fixed to the armrest frame 8, and a coil portion 12 of a lock spring 11 constituting a part of the lock device L is fitted to the outer periphery of the fixing collar 10, and one end of the lock spring 11 is Engage with the engagement hole 14 of the spring mounting bracket 13 fixed to the dorsal bracket 6. One end of the lock spring 11 does not move even if the height of the armrest 4 is adjusted, so that the lock spring 11 becomes the fixed side end 15. The other end of the lock spring 11 is formed at a free end 20 whose position changes as the height of the armrest 4 is adjusted.

In this case, the coil portion 12 sets the winding direction to be tightened when the fixing collar 10 is rotated with the downward movement of the armrest 4, thereby rotating the armrest 4 downward even when the other end is the free end 20. If it tries to make it act, it will act in the direction which makes the diameter of the coil part 12 small by the frictional resistance of the collar 10 for fixation, and the inner periphery of the coil part 12, and will prevent the armrest 4 from rotating downward by this frictional resistance and will lock. Let
Thus, the spring mounting bracket 13 has an unlocking cam surface 22 that holds the free end 20 of the locking device L in the unlocked position, and a guide cam surface 23 that guides the engagement with the unlocking cam surface 22. The switching cam groove 24 is formed.
The switching cam groove 24 is bent to a bent plate portion 25 bent substantially parallel to the fixing collar 10 of the spring mounting bracket 13, and is basically bent to be parallel to the axial direction (left-right direction) of the fixing collar 10. The front end side (left side) of the part 25 is formed in a U shape.

In the embodiment, the bent plate portion 25 is formed on the lower side of the spring mounting bracket 13, but the installation position of the bent plate portion 25 is not limited to the illustration.
The unlock cam surface 22 is formed substantially in parallel with the axial direction of the fixing collar 10 on the lower rotation direction side (rear side) of the armrest 4 of the switching cam groove 24, and the armrest 4 of the switching cam groove 24 is formed. A guide cam surface 23 is formed on the upward rotation direction side (front side) by being inclined so as to approach the unlocking cam surface 22 (rear side) as it reaches the opening direction (left direction) of the switching cam groove 24.

A gap 26 through which the free end 20 can pass is provided between the tip of the guide cam surface 23 and the outer edge of the unlock cam surface 22.
The bent plate portion 25 following the unlock cam surface 22 is formed on an inclined surface 27 that approaches the base side (right side) of the bent plate portion 25 as it reaches the rear side.
On the other hand, the shaft 7 and the fixing collar 10 are provided with a contact member 30 with which the free end 20 that moves by the rotation of the armrest 4 contacts. The abutting member 30 fixes a plate member 31 in a direction intersecting the fixing collar 10 to an end portion of the fixing collar 10, and the plate member 31 has an unfit for fitting the free end 20 in the switching cam groove 24. A lock contact portion 32 is provided. The unlocking contact portion 32 contacts the free end 20 in the locked state, moves the free end 20 in the loosening direction of the coil portion 12, and the free end 20 pushed by the unlocking contact portion 32 is the guide cam surface. 23, and is fitted into the switching cam groove 24.

When the edge of the unlocking contact portion 32 coincides with the edge of the unlocking cam surface 22 and the free end 20 is guided and moved by the guide cam surface 23 to the edge of the unlocking contact portion 32, The free end 20 comes off the unlock contact portion 32 and abuts on the unlock cam surface 22 by the elasticity of the free end 20 itself.
The rear peripheral edge of the unlocking contact portion 32 of the plate member 31 is formed on the unlock holding surface 33 that is flush with the edge of the unlocking contact portion 32. Since the free end 20 is in contact with the unlocking cam surface 22 and the diameter of the coil portion 12 is enlarged to be in the unlocked state, the free end 20 does not normally come off from the unlocking cam surface 22 but is unlocked. The unlock holding surface 33 is positioned on the side of the edge of the cam surface 22 for holding the unlocked state. Further, if the unlocking contact portion 32 is arranged so that the armrest 4 is positioned between the upper limit position of the use range and the storage range B, the unlocking portion 32 can be unlocked without moving the armrest 4 up to the upper limit of the storage range B. In this state, the armrest 4 can be rotated downward, and the operability is remarkably improved.

Further, a disengagement preventing surface 34 in the crossing direction is provided on the rear peripheral edge of the plate member 31 following the unlock holding surface 33. The disengagement prevention surface 34 prevents the free end 20 from being disengaged from both the switching cam groove 24 and the peripheral edge of the plate member 31 and becoming inoperable.
In other words, if the disengagement prevention surface 34 is not provided, the free end 20 engages with the switching cam groove 24 and is in contact with the unlock holding surface 33 so that it can be rotated excessively from the retracted position. However, the armrest 4 is prevented from excessively rotating by the disengagement preventing surface 34 to prevent the mechanical lock.
In this case, the armrest 4 is set so that the free end 20 is fitted into the switching cam groove 24 when the armrest 4 is rotated upward to the upper limit position of the use range originally used as the armrest 4, and the use range is exceeded. In the storage range B, the free end 20 is always fitted in the switching cam groove 24 and held by the unlock holding surface 33.

  Accordingly, the free end 20 engaged with the unlocking cam surface 22 of the switching cam groove 24 is detached from the unlocking cam surface 22 at the front portion of the plate member 31 to make the free end 20 free. An unlock release unit 37 for returning is provided. The unlocking portion 37 bends the front end portion of the plate member 31 toward the spring mounting bracket 13 to form a bent portion 38, and inclines forward (upward rotational direction side) from the tip of the bent portion 38 to the base portion. The tilt release surface 39 is formed, and the tilt release surface 39 is positioned outside the edge of the unlock cam surface 22 so that the unlock cam surface 22 and the contact member 30 move relative to each other. The free end 20 is guided by the inclination release surface 39 of the unlock release portion 37 and is separated from the unlock cam surface 22 (switching cam groove 24), thereby bringing the unlocked state into a lockable state.

(Operation of Example)
When the armrest 4 is at the lowest position in the use range of the substantially horizontal position, the stopper projection 51 and the stopper projection 52 provided on the armrest frame 8 of the armrest 4 abut against the use position stopper surface 48 of each of the protrusion 46 and the protrusion 47. Therefore, further downward rotation of the armrest 4 is restricted.

Since the protrusion 46 and the protrusion 47 are formed in an arc shape concentric with the shaft 7, both end surfaces of the protrusion 46 and the protrusion 47 are positioned in the movement path of the stopper protrusion 51 and the stopper protrusion 52. To do.
Therefore, when the armrest 4 is raised, the stopper protrusion 51 and the stopper protrusion 52 that are in contact with the use position stopper surfaces 48 of the protrusion 46 and the protrusion 47 respectively rise. It abuts against the stopper surface 49 and restricts further upward (rear) rotation of the armrest 4.

  In this case, the use position stopper surface 48 and the standing position stopper surface 49 are formed on the end faces in the length direction of the protrusion 46 and the protrusion 47, respectively, and the use position stopper surface 48 and the standing position stopper surface 49 are 180 degrees out of phase. Since the stopper projection 51 and the stopper projection 52 are in contact with the use position stopper surface 48 and the standing position stopper surface 49, the load is supported at two places. Disperse and support securely.

  Further, since the use position stopper surface 48 and the standing position stopper surface 49 are formed at both ends in the length direction of the arc-shaped protrusions 46 and 47 concentric with the rotation center of the armrest 4, the protrusions 46 and 47. The shape itself acts as a “rib” that prevents the deformation of the side plate 42, and can support the load firmly, resulting in a rational configuration.

Thus, since the protrusion 46 and the protrusion 47 are formed by press working in the manufacturing process of the dorsal bracket 6, the process for manufacturing and attaching the protrusion 46 and the protrusion 47 can be omitted. Reduce manufacturing costs.
Further, since the use position stopper surface 48 and the standing position stopper surface 49 of the protrusion 46 and the protrusion 47 are formed so as to protrude outward from the side plate 42, the protrusion 46 and the protrusion 47 of the protrusion 46 are pressed. There is no problem even if through holes 50 for the press die to escape are formed at both ends. Therefore, it does not have to be based on precise pressing, and this also reduces the manufacturing cost.

Since the protrusions 46 and the protrusions 47 are provided so as to protrude outwardly from the outer side plate 42 of the back bracket 6, the presence of the protrusions 46 and the protrusions 47 is completely equal to the volume in the back bracket 6. Does not affect.
Therefore, the locking device L constituting the height adjustment mechanism of the armrest 4 can be accommodated in the dorsal bracket 6.
Since the locking device L provided in the dorsal bracket 6 is supported by the dorsal skeleton frame 5 together with the dorsal bracket 6, the weight of the armrest 4 itself can be reduced. The moment when swinging can be reduced, and as a result, deformation such as distortion of the dorsal bracket 6 and dorsal skeleton frame 5 is also prevented.

The disassembled perspective view of a locking device. The perspective view of a dorsal bracket and an armrest. The action state figure of a rotation control means. The same part expansion exploded perspective view. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The side view which shows the positional relationship of an armrest and a supine frame frame. The perspective view of the locking device of FIG. The positional relationship figure of a switching cam groove and a contact member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat seat, 3 ... Dorsal seat, 4 ... Armrest, 5 ... Dorsal skeleton frame, 6 ... Dorsal bracket, 7 ... Shaft, 8 ... Armrest frame, 10 ... Collar, 11 ... Lock spring, DESCRIPTION OF SYMBOLS 12 ... Coil part, 13 ... Spring mounting bracket, 14 ... Engagement hole, 15 ... Fixed side end, 20 ... Free end, 22 ... Unlocking cam surface, 23 ... Guide cam surface, 24 ... Switching cam groove, 25 ... Bent plate portion, 26 ... Gap, 27 ... Inclined surface, 30 ... Contact member, 31 ... Plate member, 32 ... Contact portion for unlocking, 33 ... Unlock holding surface, 34 ... Anti-detachment surface, 37 ... Unlock release part, 38 ... Bending part, 39 ... Inclination release surface, 40 ... Front and rear plate, 41 ... Upper and lower plate, 42 ... Outer side plate, 43 ... Mounting part, 44 ... Fastening tool, 45 ... Through hole, 46 ... Projection Thread 47, ridge 48, stopper surface 49, strike Tapered surface, 50 ... through hole, 51 ... stopper projection, 52 ... stopper projections.

Claims (4)

The armrest 4 is provided on the side portion of the dorsal fin seat so as to be pivotable up and down by the shaft 7 in the left-right direction. The backrest bracket 6 is provided with a pair of protrusions 46 and 47, which are concentric with the shaft 7 and have a predetermined length, protruding outward and spaced apart from each other by a predetermined interval. The armrest frame 8 has a pair of stopper protrusions 51 and stopper protrusions protruding toward the dorsal skeleton frame 5 so as to move concentrically between the protrusions 46 and 47. 52 is an armrest rotation restricting device which is configured by changing the phase by 180 degrees. 2. The use according to claim 1, wherein the stopper protrusion 51 and the stopper protrusion 52 are formed so as to stand substantially perpendicular to the side plate 42 at both ends in the length direction of the arc-shaped protrusion 46 and protrusion 47, respectively. An armrest rotation restricting device configured to engage with the position stopper surface 48 and the standing position stopper surface 49. The armrest rotation restricting device according to claim 1 or 2, wherein the side plate 42 on which both ends of the protrusion 46 and the protrusion 47 are located is provided with a through hole 50. In Claim 1, 2 or 3, the dorsal bracket 6 is formed in a box shape having a predetermined volume, and the protrusions 46, 47 are provided on the outer surface of the box-shaped side plate 42. Armrest rotation restricting device.

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