JPS6236654Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a switching device incorporated into a mechanism for adjusting the height and inclination of an object, such as a car seat.

The height and inclination of objects such as car seats,
Conventionally, when adjusting according to the driver's physique and preferences, a height adjustment mechanism and a tilt adjustment mechanism were provided separately, and an adjustment handle that was independently incorporated into these mechanisms was used. The height and inclination can be adjusted by operating it.

Therefore, the structure is complicated, the number of parts is increased, and there are disadvantages such as being prone to failure and complicated operation.

This idea was created in view of the above-mentioned drawbacks of the conventional technology, and it simplified the structure and operation by making it possible to adjust both the height and inclination with a single adjustment handle, reducing the number of parts and preventing failures. An object of the present invention is to provide a switching device that prevents the occurrence of.

Embodiments of this invention will be described below with reference to the drawings.

1 and 2, 1 is a support shaft, 2 is a tilting link, 3 is a bracket, 4 is a lock member,
5 is a moving member, 6 is an operating link, and 7 is a switching means.

The above-mentioned raising/lowering link 2 is connected to the receiving member 9 by having its base 2a fixed to the support shaft 1, and fitting the pin 2b fixed to one end into the long hole 9a of the receiving member 9 provided upright on the base 8. An arcuate tooth portion 2c centered around the support shaft 1 is formed on the outer edge.

As is clear from FIG. 2, the bracket 3 is provided adjacent to the outside of the above-mentioned tilting link 2, passes through the support shaft 1 rotatably at the front side, and has a locking member 4 inside the upper end. The fixed locking member 4 and the tilting link 2 are vertically opposed to each other, and a fan-shaped hole 3a is formed.

The inner edge of the locking member 4 fixed inside the upper end of the bracket 3 is formed with an arcuate tooth portion 4a centered on the support shaft 1.

The moving member 5 is a toothed portion 2c of the above-mentioned raising/lowering link 2.
and the teeth 4a of the locking member 4 are interposed in the opposing gap, and the upper edge thereof has a toothing portion 5a that can mesh with the toothing portion 4a of the locking member 4, and the lower edge thereof has a toothing portion 2c of the tilting link 2. A tooth portion 5b that can be engaged is formed.

The operating link 6 is provided adjacent to the inside of the tilting link 2, and has the support shaft 1 rotatably inserted through its base 6a, and has an elongated hole 6b extending in the radial direction of the support shaft 1.
is formed.

By providing the operating link 6 adjacent to the inside of the tilting link 2, the tooth portion 2 of the tilting link 2 can be
The movable member 5, which is interposed in the opposing gap between the tooth portion 4a of the lock member 4 and the tooth portion 4a of the lock member 4, is interposed between the bracket 3 and the operating link 6.
By inserting pins 5c protruding from the front and back surfaces of the bracket into the fan-shaped hole 3a of the bracket and the elongated hole 6b formed in the operating link 6, the movable member 5 reciprocates up and down using the elongated hole 6b as a guide. 5b can be alternately engaged with either the toothed portion 2c of the raising/lowering link 2 or the toothed portion 4a of the locking member 4.

The switching means 7 is for switching between height adjustment and inclination adjustment by moving the moving member 5 up and down using the elongated hole 6b as a guide.
a, a switching lever 7b, and a link 7c, and the switching handle 7a has its base 7a ₁ externally fitted around the support shaft 1 so as to be rotatable, and the base 7a ₁ of the switching lever 7b. is fixed, one end of the link 7c is pivotally connected to the tip of the switching lever 7b via a pin 10,
The other end of the link 7c is rotatably connected to the pin 5c of the moving member 5.

The operating link 6 is connected to one end of a rear tilting link 13 fixed to a rear support shaft 12 via an interlocking link 11, and the other end of the rear tilting link 13 is erected on a base 8. It is rotatably connected to the pin 14a of the rear receiving member 14. Further, the support shaft 12 extends rotatably through the rear side of the bracket 3.

15 is a height and inclination adjustment handle, 16 is a support shaft, and 17 is a gear that rotates at the same time as the adjustment handle 15, and is constantly engaged with the teeth 2c of the tilting link 2. As shown in FIG. 2, a braking device 18 is provided so that the spindle 16 and gears can rotate only when the handle 15 is gripped and operated. In the figure, reference numeral 19 indicates an object such as a seat cushion frame fixed to the bracket 3.

In the above configuration, when adjusting the height of the object 19, the height and the When the tilt adjustment handle 15 is rotated clockwise, this rotation is transmitted from the gear 17 to the tooth portion 2c of the tilting link 2.
rotates counterclockwise around the pin 2b, and since the movable member 5 engages the teeth 2c of the tilting link 2, it is displaced counterclockwise together with the tilting link 2.

As the movable member 5 moves counterclockwise, the operating link 6 whose pin 5c is inserted into the elongated hole 6b rotates counterclockwise at the same time as the raising/lowering link 2. Rear side tilting link 13
is rotated at the same angle and in the same direction as the raising/lowering link 2, to obtain a state in which the bracket 3 and the object 19 are raised parallel to the base 8 as shown in FIG.

In the state shown in FIG. 4, when the height and inclination adjustment handle 15 is rotated counterclockwise, the bracket 3 and the object 19 are lowered by the above-mentioned reverse operation, returning to the state shown in FIG.

When adjusting the inclination of the object 19, the switching handle 7a of the switching means 7 is rotated clockwise. As a result of this rotational operation, the switching lever 7b and the switching link 7c become linear as shown in FIG.
It moves in the radial direction of the support shaft 1 using the elongated hole 6b as a guide. Therefore, the tooth portion 5b of the moving member 5 separates from the tooth portion 2c of the tilting link 2, and the tooth portion 5a meshes with the tooth portion 4a of the locking member 4. As a result, the operating link 6 is locked to the locking member 4 via the movable member 5, and the rear tilting link 13 is also locked via the interlocking link 11, so that the height of the rear support shaft 12 is fixed. to be secured.

After performing the above switching operation, turn the height and inclination adjustment handle 15 clockwise.
Only the front tilting link 2 rotates counterclockwise around the pin 2b to raise the position of the support shaft 1.
The bracket 3 is in a tilted state with the front side rotated upwards using the rear pin 14a as a fulcrum (see Fig. 6).
, and the object 19 fixed to the bracket 3
It also slopes forward.

On the other hand, in the state shown in FIG. 5, when the height inclination adjustment handle 15 is rotated counterclockwise, the front parts of the bracket 3 and the object 19 are lowered, and the bracket 3 and the object 19 are brought into a tilted state with a rearward height.

As explained above, this invention is configured so that the height and inclination of an object can be adjusted by operating a single height and inclination adjustment handle, which simplifies the structure and operation and reduces the number of parts. This has the advantage of reducing the occurrence of failures and ensuring proper operation.

[Brief explanation of the drawing]

1 is a side view of an embodiment in which the switching device according to the invention is applied to a seat cushion height and inclination adjustment mechanism; FIG. 2 is a sectional view taken along line A-A in FIG. 1; Figure 3 is a plan view of Figure 1, and Figure 4 is a plan view of Figure 1.
The figure is a side view during height adjustment, FIG. 5 is a side view showing the switching state of the switching device, and FIG. 6 is a side view during tilt adjustment. DESCRIPTION OF SYMBOLS 1... Support shaft, 2... Lifting link, 2c... Teeth of the lifting/lowering link, 3... Bracket, 4... Lock member, 4a... Teeth of lock member, 5... Moving member, 5a , 5b... Tooth portion of moving member, 5c... Pin, 6... Operating link, 6b... Elongated hole, 7... Switching means, 19... Object.

Claims (1)

[Scope of utility model registration request] The teeth formed on the outer edge of the tilting link fixed to the support shaft and the teeth formed on the inner edge of the locking member fixed to the bracket are opposed to each other on a concentric arc centered on the support shaft. At the same time, a movable member having a pair of teeth formed at both ends capable of meshing with both the teeth is interposed in the opposing gap between the tilting link and the locking member, and the operating link is set around the support shaft as a fulcrum. A pin protruding from the movable member is inserted into a long hole formed in the radial direction of the support shaft in the operating link, so that the movable member can reciprocate using the long hole as a guide. The object is characterized in that it is provided with a switching means that reciprocates the elongated hole as a guide and engages the pair of teeth with either the teeth on the outer edge of the tilting link or the teeth on the inner edge of the locking member. Switching device for height and inclination adjustment.