JP2557296Y2 - Reclining device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a lower arm fixed to a seat cushion, an upper arm provided to be tiltable with respect to the lower arm via a hinge pin, a ratchet rotating integrally with the upper arm, and the lower arm. And a release arm rotatably provided with a pin and capable of engaging and disengaging the ratchet, and a release arm having a base end rotatably provided on the hinge pin for engaging and disengaging the pawl and the ratchet. Reclining device.

[0002]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings. FIG. 5 is a side view showing one of conventional double-sided reclining devices, and FIG. 6 is a sectional view taken along line AA in FIG.

[0003] First, a lower arm 1 is fixed to the seat cushion side, and a hinge pin 2 is attached to the lower arm 1.
Thus, the upper arm 3 is pivotally supported so as to be tiltable.
The upper arm 3 has its upper part fixed to the seat back side, and is urged by a spiral spring 4 in the forward falling direction. A ratchet 5 is fixed to the upper arm 3 and rotates together with the upper arm 3. A pin 7 having one end inserted into the circular arc-shaped long hole 6 of the lower arm 1 is fixed to the ratchet 5. The maximum rotation angle of the upper arm 3 is determined by the rotation range of the pin 7.

[0004] A pole 8 is engaged with the ratchet 5 and is rotatably attached to the lower arm 1 with a pin 9. A pin 10 is implanted on the pole 8. 1
Reference numeral 1 denotes a release arm which is pivotally attached to the hinge pin 2 and is urged by a tension spring 20 in a counterclockwise direction in FIG. 5, and the pin 10 is inserted through a cam hole 12 thereof. The extension of the release arm 11 is a handle 13. An arm plate 14 has one end pivotally attached to the hinge pin 2 and the other end fixed to the release arm 11 with an arm hinge pin 15. Arm hinge pin 1
The spacer 1 that contacts the back of the pole 8 is provided on the large-diameter portion 5.
6 is inserted. 17 is a hook plate 18 at the end
Is a connecting pipe fixed by welding or the like, and a small-diameter portion of the hinge pin 2 is inserted into one end of the connecting pipe.

[0005] The tip of the hook plate 18 is inserted into a connection hole 19 of the arm plate 14. The width W1 of the tip of the hook plate 18 is selected to be smaller than the width W2 of the connecting hole 19 of the arm plate 14.
The magnitude of W1 -W2 is such that some play occurs,
The lock position is determined according to the degree of variation in the lock position. The selection is made such that a play larger than the so-called shift amount of the lock position occurs between the release arm 11 and the release arm of the other reclining device. Usually, it is about 2 to 5 mm.

Reference numeral 21 denotes a release arm 11 and a pole 8
And a sub-plate having a substantially triangular shape disposed between them, one end of which is engaged with a hinge pin 2, and the other two ends of which are locked with a pin to a lower arm 1. The sub-plate 21 covers the meshing portion between the pawl 8 and the ratchet 5 and regulates the axial displacement of the hinge pin 2 in the meshing between the pawl 8 and the ratchet 5.

The lower arm 1, the ratchet 5, the upper arm 3, the sub-plate 21 and the release arm 11 are engaged with the flange 2a of the hinge pin 2 and the hinge pin 2.
The axial movement of the hinge pin 2 is prohibited by the ring 22.

Next, the operation of the above configuration will be described. When the handle 13 (release arm 11) is rotated clockwise in FIG. 5 against the urging force of the tension spring 20, the pawl 8 is guided by the cam hole 12 and rotates counterclockwise. Is released, and the upper arm 3 can be tilted with respect to the lower arm 1.

On the other hand, the turning force of the handle 13 is applied to the hook plate 1 inserted into the connecting hole 19 in the arm plate 14.
8, transmitted to the inner reclining device via the connecting pipe 17 to which the hook plate 18 is fixed.

When the desired reclining angle is obtained by tilting the upper arm 3, the force for rotating the handle 13 is released. Then, the biasing force of the tension spring 20 causes the pawl 8 to return to the ratchet 5.
And lock state.

[0011]

However, the reclining device having the above structure has the following problems.

The lower arm 1, the ratchet 5, the upper arm 3, the sub-plate 21 and the release arm 11 are attached by the collar 2 a of the hinge pin 2 and the E-ring 22. 1, rattle 5, upper arm 3, sub-plate 21, and release arm 11 easily cause play. Therefore, in order to sufficiently secure the engagement strength between the pawl 8 and the ratchet 5, the plate thickness of the pawl 8 and the ratchet 5 must be increased (for example, about 5 mm), and the weight of the reclining device increases. ,
Moreover, the cost is high.

Since the engagement between the pawl 8 and the ratchet 5 is suppressed by the sub-plate 21, the rigidity of the sub-plate 21 is required, which causes an increase in weight and cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a reclining device capable of reducing the number of working steps, securing sufficient lock strength, and reducing the weight and cost. It is in.

[0015]

Means for solving the above problems are to provide a lower arm fixed to the seat cushion side, an upper arm provided to be tiltable with respect to the lower arm via a hinge pin, and an integral part of the upper arm. A ratchet that rotates as a pin, the lower arm is rotatably provided by using a pin, and a pawl that can be disengaged from the ratchet, and a base end is rotatably provided on the hinge pin, and the pawl and the ratchet In a reclining device having a release arm for engaging and disengaging, a collar portion extending to cover the engagement portion between the ratchet and the pawl is formed at a distal end side of the pin, and a proximal end portion is formed on the lower arm. It is the one that has been caulked.

[0016]

According to the reclining device of the present invention, a locking portion between the ratchet and the pole is ensured by forming a flange that extends to cover the engaging portion between the ratchet and the pole on the pin that rotatably mounts the pole on the lower arm. In addition, weight and cost can be reduced.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a sectional view taken along line BB of FIG. 2 showing a side view of the reclining device of one embodiment of the present invention. FIG. 2 is a side view of the reclining device of one embodiment of the present invention. FIG. 4 is an enlarged view of an engagement portion of a ratchet portion.
FIG. 4 is a diagram for explaining caulking of a hinge pin.

In the figure, first, a lower arm 31 is fixed to the seat cushion side, and an upper arm 33 is pivotally supported on the lower arm 31 by a hinge pin 32 so as to be tiltable. The upper arm 33 has its upper part fixed to the seat back side, and is urged by a spiral spring 34 in the forward falling direction. 35
Is a ratchet with teeth carved thereon, which is fixed to the upper arm 33 and rotates together with the upper arm 33. One end of the ratchet 35 is attached to the lower arm 3.
A pin 37 that is inserted into one arc-shaped long hole 36 is fixed. The maximum rotation angle of the upper arm 33 is
7 is determined by the rotation range.

Reference numeral 38 denotes a pole on which teeth for engaging the teeth of the ratchet 35 are engraved.
It is rotatably mounted on. Also, on the pole 38,
A pin 40 is implanted. Reference numeral 41 is pivotally connected to the hinge pin 32, and the tension spring 50 is rotated counterclockwise in FIG.
Release arm urged by the
The pin 40 is inserted through the pin. This release arm 41
The extension of is a handle 43. An arm plate 44 has one end pivotally connected to the hinge pin 32 and the other end fixed to the release arm 41 with an arm hinge pin 45. A spacer 46 that comes into contact with the back of the pole 38 is inserted through the large diameter portion of the arm hinge pin 45. A connecting pipe 47 has a hook plate 48 fixed to an end thereof by welding or the like, and a small-diameter portion of the hinge pin 32 is inserted into one end thereof.

The tip of the hook plate 48 is inserted into a connecting hole 49 of the arm plate 44. The width W1 of the tip of the hook plate 48 is selected to be smaller than the width W2 of the connecting hole 49 of the arm plate 44.
The magnitude of W1 -W2 is such that some play occurs,
The lock position is determined according to the degree of variation in the lock position. It is selected such that a play larger than the so-called lock position shift amount occurs between the release arm 41 and the release arm of the other reclining device. Usually, it is about 2 to 5 mm.

Reference numeral 51 denotes the release arm 41 and the pole 3
8 is a substantially triangular sub-plate disposed between the sub-plate 8 and the sub-plate 8. One end of the sub plate 51 is a hinge pin 3
2 and the other two ends are connected to the lower arm 31 by pins 5
Locked with 2,39.

Next, the pin 40 for rotatably attaching the pole 38 to the lower arm 31 will be described with reference to FIG. A flange 40a is formed on the tip end side of the pin 40 so as to extend to an engagement portion between the pawl 38 and the ratchet 35. Further, the base end of the pin 40 is caulked to the lower arm 31 via the washer 60.

Next, the mounting of the lower arm 31, the ratchet 35, the upper arm 33, the sub-plate 51 and the release arm 41 will be described. The hinge pin 32 has a first flange portion 32a, a groove portion 32b, and a second flange portion 32c. On the first flange portion 32a, a lower arm 31, a ratchet 35, an upper arm 33, a sub plate 51, and a release arm 41 are provided. Are stacked. Then, the washer 55 is attached to the groove 32b of the hinge pin 32,
By caulking the second brim portion 32c (part C in FIG. 4),
These lower arm 31, ratchet 35, upper arm 3
3. The sub-plate 51 and the release arm 41 are attached.

Next, the operation of the above configuration will be described. When the handle 43 (release arm 41) is rotated clockwise in FIG. 2 against the urging force of the tension spring 50, the pawl 38 is guided by the cam hole 42 and rotates counterclockwise. Is disengaged, and the upper arm 33 can be tilted with respect to the lower arm 31.

On the other hand, the turning force of the handle 43 is applied to the hook plate 4 inserted into the connecting hole 49 in the arm plate 44.
8. The hook plate 48 is transmitted to the inner-side reclining device via the connecting pipe 47 to which the hook plate 48 is fixed.

When the upper arm 33 is tilted and a desired reclining angle is obtained, the force for rotating the handle 43 is released. Then, the pawl 38 is again engaged with the ratchet 35 by the urging force of the tension spring 50, and the ratchet 35 is locked.

According to the above configuration, the pin 38 is
By forming the collar portion 40a extending to cover the meshing portion between the pawl 38 and the ratchet 35, the meshing portion between the pawl 38 and the ratchet 35 is pressed by the collar portion 40a. Therefore, the sub plate 51 is connected to the pin 40 by the pole 38 and the ratchet 35 as in the conventional reclining device.
It is not necessary to extend until the portion that meshes with the cover is covered, so that the weight and cost can be reduced.

Further, since the lower arm 31, the ratchet 35, the upper arm 33, the sub-plate 51 and the release arm 41 are attached to the hinge pins 32 by using caulking, the number of attachment steps is reduced and the hinge pins 3 are attached.
2, the dimensional accuracy in the axial direction is improved, and the plate thicknesses of the pole 38 and the ratchet 35 can be made smaller than before. Therefore, weight reduction and cost reduction can be achieved.

[0029]

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a reclining device capable of reducing the number of work steps, securing sufficient lock strength, and reducing the weight and cost. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line BB of FIG. 2 showing a side view of the reclining device of one embodiment of the present invention.

FIG. 2 is a side view of the reclining device according to the embodiment of the present invention;

FIG. 3 is an enlarged view of an engagement portion between a pole and a ratchet portion in FIG. 2;

FIG. 4 is a diagram illustrating caulking of a hinge pin.

FIG. 5 is a side view showing one of conventional double-sided reclining devices.

FIG. 6 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 31 Lower arm 32 Hinge pin 33 Upper arm 35 Ratchet 38 Pole 41 Release arm 40 Pin 40a Collar 51 Sub plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower arm (31) fixedly mounted on a seat cushion side, an upper arm (33) provided to be tiltable with respect to the lower arm (31) via a hinge pin (32), and an upper arm (33). ) And a ratchet (35) that rotates together with the lower arm (3).
1) a pin (38) rotatably provided by using a pin (40) and capable of engaging and disengaging from the ratchet (35), and a base end rotatably provided on the hinge pin (32); A reclining device comprising a release arm (41) for engaging and disengaging the ratchet (38) and the ratchet (35), wherein the ratchet (35) is provided on the tip side of the pin (40).
A flange portion (40a) extending to cover the engagement portion between the lower arm and the pole (38) is formed.
A reclining device characterized by being crimped in 1).