JPS6149964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for adjusting the inclination angle of an automobile seat.

(Prior Art) The known example closest to the present invention is Japanese Patent Application Laid-open No. 8664/1983.

However, as shown in Figure 1, the fixed seat plate A
A tooth surface B is formed on the outer peripheral edge of the movable seat plate D, and a ratchet E that engages with the tooth surface B is attached to the side of the movable seat plate D which is fixed to the fixed seat plate A by a shaft C. A method is known in which the ratchets E are engaged and fixed after tilting back and forth arbitrarily.

In this known example, since the tooth spacing on the tooth surface B cannot be made extremely small (if it is made extremely small, the engagement of the ratchet E becomes shallow and it is not possible to securely lock), the tooth spacing becomes large and normally The adjustment structure was approximately 3 degrees and 30 minutes per step.

The above-mentioned Japanese Patent Application Laid-Open No. 50-8664 points out the above-mentioned known defects and makes it possible to finely adjust the range of adjustment of the movable seat.

The outline of its configuration is that a movable seat plate 2' for the backrest is provided on a fixed seat plate 1' fixed to the vehicle body side so as to be tiltable back and forth around a shaft 3', and the shaft 3' and another shaft 6' A latch plate 5' having a surface 7' is pivotally supported, and a pin 4' for moving the latch plate 5' is provided on the movable seat plate 2'. One end of the ratchet 8' is fixed with a shaft, a tooth surface is formed on the other end of the ratchet 8', and the tooth surface and the tooth surface 7' are engaged with each other. The lever 10' that operates the shaft 1
It has a structure in which it is pivoted at 1'.

(Problems to be Solved by the Invention) The device shown in FIG. 2 requires a total of four axes: a-axis 3', b-axis 6', c-axis 9', and d-axis 11'. Therefore, it becomes large as a structure to be installed in a narrow space.

Also, if we look at the movement of the pin 4' in Fig. 2 accurately, since the pin 4' rotates around the shaft 3',
It gradually moves away from the axis 6'. Therefore, the movement of the latch plate 5' is not proportional to the movement of the movable seat plate 2', but gradually increases. That is, while the latch plate 5' rotates by the same angle one tooth at a time on the tooth surface 7', the movable seat plate 2' for the backrest seat moves so as to rotate gradually by a larger amount.

(Means for solving the problem) Therefore, in the present invention, a movable seat plate 5 for a backrest seat is provided on a fixed seat plate 1 fixed to the vehicle body side so as to be tiltable back and forth by a shaft 4. A latch plate 12 having a tooth surface 20 is pivotally supported, and one end of the latch plate 10 is pivotally fixed to either the fixed seat plate 1 or the movable seat plate 5 by a shaft 9 at a position near the shaft 4. A tooth surface 11 is formed on the other end of the latch plate 10, and the tooth surface 11 and the tooth surface 20 engage with each other at a lateral position in the direction connecting the shaft 4 and the shaft 9, and Either the seat plate 1 or the movable seat plate 5 has a pin 1 that engages with a long hole 14 formed in the latch plate 10.
3, the elongated hole 14 with which the pin 13 engages;
A cam surface 14a on which the movable seat plate 5 rotates by a constant angle in response to the rotation of each tooth of the latch plate 10 is formed to have the shape of the inner surface of the vehicle seat. The adjustment device is constructed so that it can be replaced with two known axes, 3', d, and 11', and allows the backrest seat to recline at a constant rate.

(Embodiment) An embodiment of the present invention constructed based on the above-mentioned theory will be described with reference to the drawings. Figure 3 and subsequent figures correspond to this. Reference numeral 1 denotes a fixed seat plate attached to the fixed seat side; The rear end portion 2 of the seat plate 1 is slightly bulged upward to form a bulge portion 3, and the middle portion of the movable seat plate 5, which is attached to the movable seat side by a shaft 4, is attached to the bulge portion 3 as a shaft. Stop. The lower end 6 of the movable seat plate 5 is
The fixed seat plate 1 reaches the lower edge 7 of the fixed seat plate 1 (if extended further downward in some cases, it becomes easier to attach the spring 8, which will be described later).
A spring 8 is interposed between the movable seat plate 5 and the movable seat plate 5 to urge the movable seat plate 5 to tilt forward.

One end of the latch plate 10 is fixed to the fixed seat plate 1 by a shaft 9 at a position diagonally downwardly away from the shaft 4. The other end of the latch plate 10 is provided so as to protrude laterally with respect to the direction line XX connecting the shafts 4 and 9, and is movable between the shafts 4 and 9. It overlaps with a part of the sheet plate 5. A tooth surface 11 is formed on the other end of the latch plate 10, and a ratchet 12 that meshes with the tooth surface 11 is fixed to the shaft 4. That is, the shaft 4 not only pivots the seat plates 1 and 5 but also pivots the ratchet 12. At the overlapping part of the latch plate 10 and the movable seat plate 5, the intermediate position between the shaft 9 and the tooth surface 11 is connected to each other by a pin 13 fixed to one of them and a long hole 14 formed in the other. to connect. Therefore, when the movable seat plate 5 rotates around the shaft 4, the latch plate 10 is rotated via the pin 13 and the elongated hole 14.
The position 3 is between the shaft 9 and the tooth surface 11 (or between the shaft 9 and the tooth surface 11).
), the movement of the tooth surface 11 becomes large. That is, even if the pitch of the teeth on the tooth surface 11 is the same as the tooth pitch on the tooth surface B in FIG. 1, the movable sheet can be finely adjusted. An intermediate portion of an operating lever 15 is fixed to the shaft 9 to which the latch plate 10 is fixed. The operating lever 1
5 has a handle 16 formed at one end and a handle 17 at the other end.
is polymerized with ratchet 12. The operating lever 1
A pin 19 protruding from one of the guide grooves 18 formed on one of the two is engaged with the overlapping portion of the ratchet 12 of the second embodiment of the present invention. The guide groove 18 has a lower end 18a close to the shaft 9 and an upper end 18b farther from the shaft 9.

Therefore, the cam surface 14a inside the elongated hole 14 is
They are formed in the relationship shown in FIG. That is, when the movable seat plate 5 rotates by a certain angle, the pin 13 moves by a certain width, but the movement amounts a, b, ... in FIG. (Looking at this), the width of the movement gradually becomes smaller. However, if the shape of the cam surface 14a that the pin 13 comes into contact with is determined and formed from this, as shown in FIG. 6, the movable seat plate 5
The latch plate 10 can always be rotated at the same angle depending on the adjustment width.

An intermediate portion of an operating lever 15 is fixed to the shaft 9 to which the latch plate 10 is fixed. The operating lever 15 forms a handle 16 at one end, and the other end 17 overlaps with the anti-rotation ratchet 12. The overlapping portion of the actuating lever 15 with the anti-rotation ratchet 12 is configured to engage a pin 19 projecting from one of the guide grooves 18 formed in one of the two. Said guide groove 18
In this case, the lower end 18a is formed close to the axis 9, and the upper end 18b is formed farther from the axis 9.

(effect) Next, we will discuss the effect.

Since the present invention has the above-described configuration, when the operating lever 15 is rotated clockwise around the shaft 9 as shown in FIG.
The latch 12 is pushed out by the upper end 18b of the latch plate 10 and moved a little further away, and the latch 12 rotates counterclockwise around the shaft 4, and the tooth surface 11 of the latch plate 10 and the tooth surface 20 of the latch plate 12 are disengaged. Since the movable seat plate 5 is in a free state, it can be tilted either forward or backward.

Therefore, when the movable seat plate 5 is tilted, the latch plate 10 is rotated to the left or right through the pin 13 and the elongated hole 14, but the pin 13 is located between the tooth surface 11 and the shaft 9. Because of this, the tooth surface 11 located further away from the pin 13 is rotated largely according to the difference in distance. In other words, even if the backrest movable seat is moved very slightly, the tooth surface 11 of the latch plate 10 will change by twice that amount. It can be formed on the tooth, allowing finer adjustment than the known example shown in FIG.

However, in the devices up to FIG. 5, the movable seat plate 5 cannot be rotated by a constant angle. In other words, when the reclining angle of the backrest seat of a vehicle becomes large, the seat back of the vehicle will recline by a large amount even with the same single-tooth adjustment.

Fig. 6 shows an improved version of this, in which when the movable seat plate 5 is rotated by a certain angle, the pin 13 moves by the amount of movement a and b, but when viewed from the axis 9, the pin 13 moves by a certain amount. When the amount is b, only the movement amount b' moves and becomes smaller.

Therefore, if the shape of the cam surface 14a that the pin 13 comes into contact with is indexed and formed so that the amount of movement b' does not differ from the amount of movement a', as shown in FIG. Therefore, the latch plate 10 can always be rotated at the same angle,
Therefore, the movable seat plate 5 can be rotated by a constant angle.

Although three elongated holes 14 are shown in FIG. 6, this is for convenience of explanation and the elongated holes 14
The number of is one.

(Effects) As described above, in the conventionally known device, as shown in Fig. 1, a tooth surface B is formed on the outer peripheral edge of a fixed seat plate A, and the fixed seat plate A is fixed to the fixed seat plate A by a shaft C. After installing a ratchet E that engages with the tooth surface B on the side of the movable seat plate D and tilting the movable seat plate D back and forth arbitrarily,
The method was to engage and fix the ratchets E. However, in this known example, the tooth spacing of the tooth surface B could not be made extremely small. In the above-mentioned Japanese Patent Application Laid-open No. 50-8664, which is an improvement on this, a movable seat plate 2' for a backrest is provided on a fixed seat plate 1' fixed to the vehicle body so that it can be tilted back and forth by a shaft 3'. A latch plate 5' having a toothed surface 7' is pivotally supported by a shaft 3' and another shaft 6', and a pin 4' for moving the latch plate 5' is provided on the movable seat plate 2'. One end of a ratchet 8' is fixed to the fixed seat plate 1' by a shaft 9', a tooth surface is formed on the other end of the ratchet 8', and the tooth surface and the tooth surface 7' are engaged. Since the fixed seat plate 1' has a structure in which a lever 10' for operating the ratchet 8' is supported by a shaft 11', there are a total of four shafts: a, shaft 3', b, shaft 6', c, shaft 9', and d, shaft 11'. The movable seat plate 2' for the backrest seat requires a shaft of
had a defect in that it gradually moved in a large rotational manner.

However, in the present invention, a movable seat plate 5 for a backrest seat is provided on a fixed seat plate 1 fixed to the vehicle body side so as to be tiltable back and forth by a shaft 4.
supports a ratchet 12 having a tooth surface 20,
the fixed seat plate 1 at a position near the shaft 4;
Alternatively, one end of a latch plate 10 is fixed to one of the movable seat plates 5 by a shaft 9, a tooth surface 11 is formed on the other end of the latch plate 10, and the tooth surface 11 and the tooth surface 20 are formed on the other end of the latch plate 10. This means that the shaft 4 and the shaft 9 are engaged at a lateral position in the direction in which they are connected, and the other of the fixed seat plate 1 and the movable seat plate 5 has a long hole 14 formed in the latch plate 10. pin 1 that engages with
3, the elongated hole 14 with which the pin 13 engages;
A cam surface 14a on which the movable seat plate 5 rotates by a constant angle in response to the rotation of each tooth of the latch plate 10 is shaped like the inner surface of the cam surface 14a. Because of the configuration of the adjustment device, it is possible not only to save the two axes 6', 9', and 9' in the known example and make it more compact, but also to be able to make the seat back recline at a constant rate. be effective.

[Brief explanation of the drawing]

Figure 1 is a first known example, Figure 2 is a second known example, Figure 3 is a side view of the inclination angle adjusting device of the present invention, and Figure 4 is with the movable seat plate of Figure 3 removed. FIG. 5 is a diagram showing the state in which the latch plate and the ratchet are disengaged, and FIG. 6 is an explanatory diagram. Explanation of symbols 1...Fixed seat plate, 2...
rear end, 3... bulge, 4... shaft, 5... movable seat plate, 6... lower end, 7... lower edge, 8...
...Spring, 9...Shaft, 10...Latch plate, 1
1... tooth surface, 12... ratchet, 13... pin, 14... long hole, 15... operating lever, 16
... Handle, 17 ... Other end, 18 ... Guide groove, 18a ... Lower end, 18b ... Upper end, 19
...Pin, A...Fixed seat plate, B...Tooth surface, C...Shaft, D...Movable seat plate, E...
...Ratchet, 1'...Fixed seat plate,
2'...Movable seat plate, 3'...Shaft, 4'...
...Pin, 5'...Latch plate, 6'...Shaft,
7'... tooth surface, 8'... ratchet, 9'... shaft,
10'...Lever, 11'...Shaft.

Claims (1)

[Claims] 1. A movable seat plate 5 for a backrest seat is provided on a fixed seat plate 1 fixed to the vehicle body side so as to be tiltable back and forth by a shaft 4. A ratchet 12 having a toothed surface 20 is pivotally supported on the shaft 4. 4, one end of a latch plate 10 is fixed to either the fixed seat plate 1 or the movable seat plate 5 by a shaft 9, and a tooth surface 11 is formed on the other end of the latch plate 10. , the tooth surface 1
1 and the tooth surface 20 are engaged with each other at a lateral position in the direction connecting the shaft 4 and the shaft 9, and either the fixed seat plate 1 or the movable seat plate 5 is provided with a latch plate 10. In the device for adjusting the inclination angle of a car seat, which is provided with a pin 13 that engages with a long hole 14 formed in
An apparatus for adjusting the inclination angle of an automobile seat, characterized in that the movable seat plate 5 is formed on a cam surface 14a that rotates by a constant angle as the latch plate 10 rotates tooth by tooth.