JPH0439717Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking device for variably locking the seat back angle of a vehicle seat such as an automobile.

[Conventional technology and its problems]

In vehicle seats that tilt the seat back backward or forward by changing the angle of the seat back with respect to the seat cushion, a gear mechanism is installed on both sides of the back frame and the cushion frame. The angle can now be adjusted. However, in such a structure, since each gear of the gear mechanism is formed continuously, a phase shift between the left and right gears is likely to occur, and smooth operation cannot be performed. In addition, the conventional device uses a striker to lock the back frame, so 1
It is only a stage lock.

Therefore, an object of the present invention is to provide a seat angle locking device that can absorb the phase shift of the gears on both sides and can perform multi-stage locking.

[Means for solving problems]

In order to achieve the above object, the present invention includes intermittent gears provided on both sides of a cushion frame that pivotally supports the back frame, and intermittent gears that mesh with the gears. The lock member includes a movably mounted lock member, a spring that biases the lock member in a direction in which the gear of the lock member meshes with the gear of the cushion frame, and a lock release member that rotates the lock member in the anti-meshing direction. It is characterized by

[Effect]

Since the present invention is constructed as described above, the gear on the cushion frame side and the gear on the lock member side act to absorb the phase shift at the discontinuous portion thereof. That is, when the gear portions are in abutment against the flat surface that is the discontinuous portion of the other gear, there is no mesh between the gears, and both gears can move relative to each other. When a phase shift occurs between the gears on both sides, the gears on both sides mesh with each other after the phase shift is eliminated by the mutual movement.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to illustrative embodiments.

FIG. 1 is an exploded perspective view of an embodiment of the present invention. A back frame 1 and a cushion frame 3 are formed of pipe frames, and the lower end of the back frame 1 and the rear end of the cushion frame 3 are fitted into an arm plate 2 and a side bracket 4, respectively, which are formed into a substantially U-shape. It is welded together. The arm plate 2 is rotatably supported by the side bracket 4 by bolts 17 and nuts 18, and the back frame 1 is thereby pivotally supported with respect to the cushion frame 3. Both the side bracket 4 and the arm plate 2 are provided on both sides of the seat. A gear member 5 is fixed to the side bracket 4 by a pin 6, and a lock member 7 corresponding to the gear member 5 is pivotally supported. It is swingably attached to the arm plate 2 by a pin 9.
As shown in FIG. 2, gears 22a, 22b, 22c are intermittently formed at predetermined intervals on the lower edge of the gear member 5, and stopper grooves 23a, 23b are formed on the left and right side edges. ing. Also, gear 2
The lower end edge of the gear member 5, on which the gear members 2a, 22b, and 22c are formed, is curved downward to enable a locking member 7, which will be described later, to move over the gear member 5. The lock member 7 is formed into a substantially curved ball shape, and the gears 22a, 22b of the gear member 5 are attached to the upper edge of the lock member 7.
Gears 24a and 24b meshing with gear 22c are formed intermittently at predetermined intervals. Here, each gear 22
a, 22b, 22c and 24a, 24b are made of involute teeth to ensure good meshing. The lock member 7 is pivotally supported by a pivot pin 9 at a right side portion from the center, and is attached to the arm plate 2 while being inserted into a support member 8. A pin 10 and the pivot pin 9 are inserted into both ends of the support member 8, and these pins 9 and 10 are inserted into the arm plate 2, thereby fixing the support member 8.
In this case, each of the pins 9 and 10 is caulked after being inserted into the arm plate 2, thereby fixing the support member 8. Further, arcuate long holes 25 and 26 are formed in the arm plate 2, and the slide pins 11 and 14, which have passed through the support member 8 and the lock member 7, are slidably inserted into the respective long holes 25 and 26. ing. A ring 13 is caulked to one of the slide pins 11, and the lower end of a wire 12 is connected thereto. The wire 12 extends upward from within the arm plate 2 along the back frame 1, and has a knob 21 at its upper end.
is fixed. The knob 21 is exposed on the upper surface of the seat pad as shown in FIG. 5, and when the knob 21 is pulled upward, the locking member 7 swings via the wire 12 in the anti-meshing direction of the gears. That is, the knob 21 and the wire 12 release the gear mesh, and
This constitutes a lock release member for releasing the lock of the back frame 1. On the other hand, one end of a spring 16 is locked to the other slide pin 14 of the slide pins. The other end of the spring 16 is locked to a set plate 15 attached to the arm plate 2, so that the spring 16 allows the gears 24a and 24b of the lock member 7 to be connected to the gear 2 of the gear member 5.
The lock member 7 is energized so as to mesh with the lock members 2a, 22b, and 22c. In FIG. 1, reference numerals 19 and 20 are stopper pins attached to the arm plate 2 in correspondence with the stopper grooves 23a and 23b of the gear member 5.

Figures 5a, b, and c show the appearance of the seat in operation of this embodiment, and Figures 6a, b, and c show corresponding side views of essential parts. Figures 5a and 6a
In the state shown in FIG.
2b and 22c, and the tilting of the back frame 1 is locked. In this state, the stopper groove 23a of the gear member 5 and the stopper pin 19 of the arm plate 2 are fitted, and further backward tilting of the back frame 1 is restricted. When the knob 21 is pulled upward in this state, the lock member 7 rotates about the pivot pin 9 against the biasing force of the spring 16, and the engagement with the gears 22a and 22b is released.
Therefore, back frame 1 is in a free state,
When the back frame 1 is rotated forward, the gears 24a and 24b of the lock member 7 face the next gears 22b and 22c of the gear member 5, and are engaged with each other by the biasing force of the spring 16. As a result, the back frame 1 becomes substantially upright with respect to the cushion frame 3 (FIG. 6b), and the seat back 27 is fixed in an upright state with respect to the seat cushion 28 as shown in FIG. Furthermore, pull the knob 21 upward and gear 24
When the meshing between a and 24b and gears 24b and 24c is released and the back frame 1 is rotated forward,
Since the lock member 7 is removed from the curved surface of the lower edge of the gear member 5, the gears are no longer engaged. In this state, the seat bag 27 is folded onto the seat cushion 28, thereby making it possible to fold the seat. (Figure 5c) and Figure 6c). In this state, the stopper pin 20 of the arm plate 2 fits into the stopper groove 23b of the gear member 5, thereby regulating the forward tilting range. To raise the seat back 27, the seat back 27 is raised and rotated rearward. In such an operation, the lower end edge of the gear member 5 is curved downward, and the lock member 7 slides along this curved surface, so that it can overcome the gear member 5, and thereby the gear 24a of the lock member 7 ,24
When b faces the next gear 22b, 22c of the gear member 5, the spring 16 causes either gear 22
c, 22b, and 22a. Therefore, the state shown in FIGS. 5b and 6b can be restored.

In this embodiment, the gear member 5, that is, the gears 22a, 22b, 2 on the cushion frame 3 side
2c and gear 2 of lock member 7 of back frame 1
4a and 24b are formed intermittently, and the lock member 7 is movable with respect to the gear member 5 without meshing in portions where the gears do not match each other. Therefore, after the phase shift of the gears on both sides of the seat is eliminated, the gears come into mesh with each other, and the phase shift on both sides is eliminated and the seat back can be tilted smoothly. Furthermore, it is possible to lock the seat in multiple stages, and it is also possible to obtain an angle that suits the preference of the seated person.

FIG. 7 is an exploded perspective view of another embodiment of the present invention, which is substantially the same as the embodiment described above, so corresponding reference numerals are given and redundant explanation will be omitted. In this embodiment, the side bracket 4 on the cushion frame side and the arm plate 2 on the back frame side are constructed separately from each frame, and are attached to the frame after the entire device is assembled. For this purpose, a connecting hole 30 is formed in the side bracket 4 to be screwed to the cushion frame, and a connecting hole 31 is formed in the arm plate 2 to be screwed to the back frame. This embodiment can be applied to existing seat frames as appropriate, thereby increasing its versatility.

[Effect of idea]

As described above, in the present invention, the gears that adjust the angle of the seat back are formed intermittently through meshing, so even if the gears are out of phase on both the left and right sides of the seat, there is no problem with the locking operation. Also, locking at multiple angles is possible.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a side view of the main parts, Figures 3 and 4 are cross-sectional views and vertical cross-sectional views of the main parts, and Figures 5 a, b, c and 6 a, b, c are overall external views showing the operation. The figure, a side view of the main parts, and FIG. 7 are an exploded perspective view of another embodiment. 1...Back frame, 3...Cushion frame, 7...Lock member, 12...Wire (lock release member), 21...Knob (lock release member),
16... Spring, 22a, 22b, 22c, 24
a, 24b...Gear.

Claims (1)

[Scope of utility model registration request] intermittent gears provided on both sides of a cushion frame that pivotally supports the back frame; a lock member rotatably attached to the back frame and having intermittent gears meshing with the gears; A seat angle locking device comprising: a spring that biases a gear in a direction in which a gear of a member meshes with a gear of a cushion frame; and a lock release member that rotates the locking member in an anti-meshing direction.