JPS6319371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a lock interlocking mechanism for a rotating seat, specifically, only when the backrest of the seat is pushed forward, the locking mechanism for the rotating seat can be released and the seat can be rotated. This invention relates to a lock interlocking mechanism for a rotating seat in which the backrest part cannot be returned to a predetermined position halfway.

A swivel seat has the advantage that its orientation can be changed in a predetermined direction, and it can also be locked in its predetermined position. However, in order to rotate a seat that was previously locked in a predetermined position, if the backrest of the seat was moved forward, the lock would be released and the seat could be rotated. However, the structure is relatively complex, and furthermore, the backrest part may return to the specified position after being tilted forward during rotation, which is a problem for rotating seats installed in narrow spaces, such as in automobiles. In some cases, there were drawbacks such as the backrest portion standing up hitting the surroundings.

In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to have a structure that allows the backrest to be unlocked and rotated only when the backrest is pushed forward, and that the backrest does not return to its original upright position during rotation. to provide a simple rotating seat lock interlock mechanism.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

The rotating seat to which the lock interlocking mechanism of the present invention is applied, shown in FIG. A device 4 is provided. An arm 5 extends upward from the reclining device 4, and an upper portion of the arm 5 is attached to a side surface of the backrest portion 3. here,
Reference numeral 6 indicates an operating lever of the reclining device 4.

FIGS. 2a and 2b are perspective views showing the lock interlocking mechanism of the present invention applied to the rotating seat of FIG.
A seat frame 7 on which the seat 1 of the rotary seat shown in FIG. 1 is placed is indicated by a chain double-dashed line. An operating rod 8 with an operating handle 2 attached to its tip
extends halfway under the seat frame 7, and its rear end is bent upward and inserted into a hole 9a formed at one end of the rotary lever 9. The rotary lever 9 is
The center thereof is rotatably supported by a support shaft 10, and the lower end portion of a lock rod 11 formed in an inverted L shape is inserted into a hole 9b formed at the other end. The rightwardly extending tip of the lock rod 11 passes through the hole 12a formed in the base plate 12, and then passes through the second hole 12a.
In the state shown in Figure a, it is in contact with the lower end of the arm 5. The arm 5 is rotatably supported at its lower end by a rotation shaft 13 attached to the base plate 12. A reclining mechanism (not shown) is provided at the lower end of the arm 5, and the backrest 3 is reclined by this mechanism.

A ring-shaped guide plate 15 is disposed on a base plate 14 in the lower part of the seat frame 7. As shown in FIG. The guide plate 15 guides the rotation of the seat frame 7 when it is placed thereon, so that the seat 1 can rotate thereon. A pair of lock holes 16a, 16b; 17a, 17b are formed on the left and right sides of the guide plate 15, respectively. This is the lock pawl 18 of the lock piece 18 that is integrally attached to the operating rod 8.
The lock holes 16a, 16b; 17a, 17b are fitted into the holes 16a, 18b to prevent the seat from rotating.
a, 18b are fitted into the lock holes 16a, 16b, the seat faces forward and the lock pawl 18
When the lock holes 17a and 17b are fitted into the lock holes 17a and 17b, the seat faces backward. In the above configuration, the operating rod 8 is biased to rotate clockwise as shown by an arrow 19 in FIG. 2a by a biasing means such as a spring (not shown). Further, the downwardly bent portion of the lock rod 11 is connected to a guide hole 2 formed in the seat frame 7, etc.
0 and is guided for movement in the left and right direction.

As described above, a lock interlocking mechanism for a rotating seat according to an embodiment of the present invention is constructed. Next, its operation will be explained with reference to FIGS. 1 to 3 a and b.

First, as shown in Fig. 1 and Fig. 2 a,
In the upright state, the right end of the lock rod 11 abuts against the lower end of the arm 5 and cannot extend to the right, as shown in FIG. 2a, more specifically, in FIG. 3a. Therefore, the rotary lever 9 is also temporarily fixed around the support shaft 10, and its longitudinal direction is located directly in the front-rear direction. The lock claw 18a of the lock piece 18 attached to the operating rod 8,
18b is a lock hole 1 formed in the guide plate 15.
6a and 16b, respectively, and the seat is locked while facing forward. In this state, even if an attempt is made to rotate the operating handle 2 counterclockwise, that is, in the direction opposite to the arrow 19 in FIG.
It does not work because it comes into contact with the lower end of the Therefore, the seat cannot be rotated either.

To rotate the seat locked in this manner, the backrest 1 is pushed forward and the arm 5 is rotated forward about the rotation axis 13 and tilted, as shown in FIG. 2b. Thereafter, the operating handle 2 is rotated counterclockwise as shown by the arrow 21 in FIG. 2b. In this case, the arm 5 is tilted forward and the right end of the locking rod 11 is
Since the operating rod 8 is not obstructed by the lower end of the operating handle 2, the operating rod 8 can be easily rotated by the operating handle 2, the upwardly bent rear end of which is shown in Figures 2b and 3b. tilt to the left. As a result, the rotary lever 9 rotates counterclockwise around the support shaft 10, and the other end of the lever 9 pushes the locking rod 11 to the right, so that the right end of the locking rod 11 is attached to the base plate. It protrudes to the right of 12. In this way, when the operating rod 8 rotates, this rod 8
The lock piece 18 that is integrally attached to the
As shown in Figure b, it is removed from the lock holes 16a and 16b. The seat is then guided by the guide plate 15 and becomes rotatable. When the seat is being rotated, even if the operation shown in the direction of the arrow 21 of the operating handle 2 is stopped, the lock claws 18a and 18b are brought into contact with the outer circumferential wall of the guide plate 15 and slid by the aforementioned biasing means (not shown). Rotating lever 9
The lock rod 11 is maintained in the state shown in FIG. 2b or 3b, and the right end of the lock rod 11 passing through the base plate 12 returns the arm 5, that is, the backrest portion 1 to its original upright state. is prevented. Then, while the backrest portion 1 remains tilted forward, the lock claws 18a and 18b rotate while sliding on the outer peripheral wall of the guide plate 15, and the lock claws 18a and 18b lock onto the guide plate 15. When the holes 17a and 17b are reached, the lock claw 18
a, 18b are fitted into the lock holes 17a, 17b, and the operating rod 8 is rotated in the direction of arrow 19 by the force of a biasing spring (not shown). As a result, the rotary lever 9 returns to its original position and straightens parallel to the front-rear direction, pulling the locking rod 11 inward, as shown in FIG. 2a. Therefore, Fig. 2b, Fig. 3b
As shown in FIG. 2, the right end portion of the locking rod 11 that had been protruding from the base plate 12 is retracted and returns to the state shown in FIGS. 2a and 3a. In this state, the arm 5 and the backrest 1 are not blocked by the right end of the locking rod 11, so they can return to their original upright positions.

The lock interlocking mechanism for a rotating seat according to another embodiment of the present invention shown in FIG. A lock member 24 having a hole 24a into which the lower end of the lock rod 11 is directly fitted is attached to the rear end of the lock member 24, thereby allowing the operation rod 23 and the lock piece 25 integrally attached to the operation rod 23 to be connected to each other. This prevents rotation of the seat around the guide plate 26. As described above, when the arm 5 is pushed forward, the locking piece 25 is released from the locking notch 27 of the guide plate 26 by the operation handle 27, allowing the seat to be rotated. Also, during rotation, the right end of the locking rod 11
The arm 5 and the backrest part 1 are prevented from returning to the original upright state from the forward position.

In the embodiment shown in FIG. 4a, the hole 24a formed in the locking member 24 may be formed as a long hole obliquely in accordance with the locus of movement of the locking rod 11 in order to allow smooth movement of the locking rod 11.

Another embodiment of the present invention, shown in FIG. 4b, is a lock interlocking mechanism for a rotating seat, in which a plate-shaped operating member 29 is used in place of the bar-shaped operating rod 23 in the mechanism shown in FIG. 4a, The central part of the operating member 29 is supported horizontally by a support shaft 30, and a hole 2 into which the locking rod 11 is fitted is inserted into the rear end.
9a is formed. When the arm 5 is pushed forward, the operating member 29 is rotated clockwise around the spindle 30 by the operating handle 31, and the locking piece 32 is removed from the locking notch 34 of the guide plate 33. The seat can also be rotated. In this case as well, during rotation, the lock rod 11
The right end portion of the backrest portion 1 prevents the backrest portion 1 from returning to the original upright state from the forward-tilted state.

5a to 5c are a plan view, a sectional view, and a side view, respectively, of a rotating unit for a rotating seat to which the lock interlocking mechanism of the present invention is applied. This rotating unit has a fixed substrate 50 disposed at the bottom. The fixed substrate 50 has a circular hole 50a formed in the center thereof, and the periphery of the hole 50a is raised in a ring shape to form an outer circumferential portion 50b. The inner circumferential circular portion 51a of the ring-shaped rotation support member 51 is in slidable contact with the outer circumferential circular portion 50b. A plurality of bearing balls 53 are arranged at equal intervals below the outer circumferential portion 51b of the rotation support member 51.
The rotation support member 51 is supported from below. A ring-shaped holding member 5 is provided on the outside of the rotation support member 51.
2 is fixed to the fixed base plate 50 by a plurality of bolts 54, and the lower end of a plurality of convex portions 52a formed at equal intervals near the circumference of the holding member 52 comes into contact with the upper surface of the rotation support member 51 near the outer circumference. The rotary support member 51 is pressed down from above. Pressing member 5
The outer peripheral part and the inner peripheral part of No. 2 are respectively bent and extended upward to form an outer peripheral wall part 52b and an inner peripheral wall part 52b.
is formed. A rotating base plate 55 having a circular hole 55a formed in the center is disposed at the top of the rotating unit, and a ring-shaped protrusion 55a is formed around the hole 55a. The outer side of the protruding portion 55a is connected to a rotary support member 51 arranged at equal intervals on the lower side by a plurality of bolts 56.
and are integrally connected via a spacer 58.
In FIG. 5a, a bracket 58 is attached to the lower part of the rotating base plate 55 by bolts 57, and an operating handle 59 is attached to this bracket 58.
An operating rod 60 having a tip at its tip is rotatably attached. Further, a lock piece 61 is integrally attached to this operating rod 60, and a lock hole 61a formed in this lock piece 61 is connected to the presser member 5.
The locking piece 5 formed on the outer peripheral wall portion 52b of No. 2
2d. The operating rod 60 locks into the lock hole 61a of the lock piece 61 by a torsion spring 62.
is urged to rotate in a direction in which it engages with the locking piece 52d.

In the rotating unit thus constructed, the aforementioned lock rod 11 and the like are connected to the right end of the operating rod 60. A seat frame and a seat are placed on top of this rotating unit to form a rotating seat. To operate this rotating unit, first, the operating handle 59 is rotated counterclockwise to disengage the locking hole 61a and the locking piece 52d. Then, the rotary support member 51 supporting the rotary board 55 is supported by the bearing balls 53 and pressed from above by the lower end of the convex part 52a of the holding member 52, and is further pressed by the outer circumferential circular part 5 of the fixed board 50.
The rotary substrate 55 rotates while the inner circumferential circular portion 51a of the rotary support member 51 is guided by the rotary support member 51. In this case, when the operating handle 59 is released during rotation coating,
The lock piece 61 returns due to the urging force of the torsion spring 26, comes into contact with the outer peripheral wall portion 52b of the holding member 52, and rotates while sliding. The lock hole 61a formed in this lock piece 61 is connected to the outer peripheral wall 5.
2b until it engages with the locking piece 52d formed on it. In FIG. 5a, the locking pieces 52d are formed at two locations, one in the lower part and one in the upper part, so that the seat can be oriented both forward and backward.

As explained above, according to the present invention, the operation of the lock rod is controlled according to the operating state of the arm that rotatably supports the backrest, and the operation handle is activated when the backrest is not tilted forward. Moreover, once it is rotated, the backrest cannot be returned to its original position, so the backrest does not return to its original position during rotation and collide with surrounding obstacles, which is convenient for operation. The structure is also simple.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a rotating seat to which the lock interlocking mechanism of the present invention is applied, and FIGS. 2a and 2b each show an embodiment of the lock interlocking mechanism of the present invention applied to the rotating seat of FIG. FIGS. 3a and 3b are a perspective view showing the operating mode of the lock interlocking mechanism of FIGS. 2a and b, and FIGS.
5 is a perspective view of a lock interlocking mechanism showing another embodiment of the present invention, and FIGS. 5a, b, and c are a plan view and a sectional view of a rotating unit for a rotating seat to which the lock interlocking mechanism of the present invention is applied, respectively. FIG. 1...Seat portion, 2,59...Operation handle, 3...
... Backrest portion, 5 ... Arm, 7 ... Seat frame, 8, 23, 60 ... Operation rod, 9 ... Rotation lever, 11 ... Lock rod, 12 ... Base plate, 13 ... Rotating shaft, 15, 26, 33... Guide plate, 16a, 16b, 17a, 17b... Lock hole, 18... Lock piece, 18a, 18b...
Lock claw, 24... Lock member, 25... Lock piece.

Claims (1)

[Claims] 1. An arm 5 fixed to the backrest 3 is rotatably attached to a base plate 12 fixed to the seat frame 7 on the rotating side of the seat 1, and a guide plate is mounted on the base plate 14 on the fixed side. 15, 26, or 33, and the seat frame 7 is rotatably attached, and the lock hole 16 is provided in the guide plate 15, 26, or 33.
a, 16b, 17a, 17b or a locking notch 27 or 34, and an operating rod 8 or 23 or a plate to which a locking piece 18 or 25 or 32 that fits into the locking hole or locking notch is integrally attached. A shaped operating member 29 is mounted to be rotatable around an axis on the rotating side or pivoted at an intermediate portion so that the front and rear ends can swing, and one end of the lock rod 11 is indirectly connected to the operating rod 8 or 23 or the operating member 29. Alternatively, the other end of the locking rod 11 is inserted into the base plate 12, and this end is configured to come into contact with the back surface of the arm 5 when the backrest part 3 is not in the forward position, so that the backrest part 3 is in the forward position. When the arm 5 is tilted forward, the operating rod 8 or 23 is rotated or the operating member 29 is swung to cause the other end of the lock rod 11 to protrude from the base plate 12, thereby maintaining the forward tilting state of the arm 5 and locking the lock piece. 18 or 25 or 32 into lock holes 16a, 16b, 17a, 17b
Or, a lock interlocking mechanism for a rotating seat, characterized in that the seat is rotated by being removed from the locking notch 27 or 34.