JPH0440518Y2 - - Google Patents

Description

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

[Prior art and its problems] In a vehicle seat in which the angle of the seat back with respect to the seat cushion is changed so that the seat back leans backward or folds forward, a gear mechanism is installed on both sides of the back frame and the cushion frame. is attached, and its angle is adjusted by meshing the gear mechanism. 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 multistage locking.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an intermittent gear provided on a cushion frame that pivotally supports a back frame, and an intermittent gear that meshes with the gear. a lock member rotatably attached to the back frame, a lock lever that transmits rotational force to the lock member, and a spring that biases the lock lever so that the gear of the lock member meshes with the gear of the cushion frame; a lock release member that rotates the lock member in the anti-meshing direction via the lock lever, and the gear of the cushion frame is arranged so as to be somewhat lower than the flat part formed between the gears. It is characterized by being formed.

[Function] 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.

[Example] Hereinafter, the present invention will be specifically described with reference to an illustrative example.

FIG. 1 is an exploded perspective view of an embodiment of the present invention. 1 is an arm plate that is integrally screwed to the lower end of the back frame (not shown);
Reference numeral 2 designates a side bracket which is similarly screwed to the rear end of the cushion frame (not shown).
The arm plate 1 is rotatably supported by the side bracket 2 by a pivot pin 15, whereby the back frame is pivotally supported relative to the cushion frame. Both the side bracket 2 and the arm plate 1 are provided on both sides of the seat. A gear member 3 is fixed to the side bracket 2 by a pin 4, and a lock member 5 corresponding to the gear member 3 is fixed to the side bracket 2 by a pin 12. It is rotatably attached to the arm plate 1 by. Here, gears 22a, 22b, 2 are provided on the lower edge of the gear member 3, as shown in FIG.
2c are formed intermittently at predetermined intervals, and stopper grooves 23a, 23b are formed on the left and right side edges thereof. Further, the lower end edge of the gear member 3, on which the gears 22a, 22b, and 22c are formed, is curved downward to enable the lock member 5, which will be described later, to move over the gear member 3. In addition, each gear 22a, 22b, 2
A flat part 24 is formed between gears 22a and 2c and on the right end side thereof.
It is shaped to be somewhat higher than b and 22c. Therefore, each gear 22a, 22b,
22c is lower than the flat part. The lock member 5 is formed into a substantially curved ball shape, and the gears 22a, 22b, 22 of the gear member 3 are attached to the upper edge of the lock member 5.
Gears 25a and 25b meshing with the gears c are formed intermittently at predetermined intervals. These gears 22a, 2
2b, 22c and 25a, 25b are all made of involute teeth, and are designed to mesh well. The locking member 5 is pivotally supported by a pin 7 on the right side of the center.
Further, it is attached to the arm plate 1 while being inserted into the support member 6. The support member 6 has a pin 8 and the pin 7 inserted at both ends,
By inserting these pins 8 and 7 into the arm plate 1, the arm plate 1 is fixed. In this case, each of the pins 8 and 7 is caulked after being inserted into the arm plate 1, thereby fixing the support member 6. Further, the arm plate 1 has an arc-shaped long hole 26.
A slide pin 12 having one end inserted into a long hole of the support member 6 and the other end inserted into the locking member 5 is slidably inserted into the long hole 26. Therefore, the lock member 5 is rotated by sliding the slide pin 12. A lock lever 19 is rotatably attached to the arm plate 1 by a pin 21. This lock lever 19 has a key-shaped hook portion 19a formed at the lower left side, and the slide pin 12 inserted into the lock member 5 is hooked to the hook portion 19a. Therefore, when the lock lever 19 rotates, the lock member 5 rotates via the slide pin 12. Further, one end of a spring 14 is locked to the lock lever 19, and the other end of the spring 14 is attached to the set plate 1 fixed to the arm plate 1.
3, and the lock lever 19 is biased clockwise, that is, in the direction in which the hook portion 19a moves upward. As a result, the lock member 5 is connected to the gear 25 via the lock lever 19.
a, 25b are gears 22a, 22b of the gear member 3,
It is biased in the direction of meshing with 22c. Further, an engaging pin 9 is inserted into the right end of the lock lever 19, and the lower end of the wire 10 is inserted into the engaging pin 9, and is prevented from coming off by press-fitting a push nut 11. The wire 10 extends upward from the arm plate 1 along the back frame, and has a knob 18 fixed to its upper end. knob 1
8 is exposed on the upper surface of the seat pad as shown in FIG. 5, and when the knob 18 is pulled upward, the wire 1
0 is pulled up, and the lock member 5 is rotated in the anti-meshing direction of the gears via the lock lever 19. That is, the knob 18 and the wire 10 constitute a lock release member that releases the gear mesh and unlocks the back frame. In Figure 1, 1
6 and 17 are stopper grooves 23a and 23 of the gear member 3.
This is a stopper pin attached to the arm plate 1 corresponding to b. Among these stopper pins, the right stopper pin 16 is brought into contact with the engaging pin 9 inserted into the lock lever 19, and the lock lever 1 is locked.
It also has the effect of stopping the rotation of 9. Furthermore, a support plate 20 is fixed to the arm plate 1 by pins 21 and 7, and serves to prevent the lock lever 19 from coming off.

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 the tilting of the back frame is locked. In this state, the stopper groove 2 of the gear member 3
3a and the stopper pin 16 of the arm plate 1 are fitted, and further backward tilting of the back frame 1 is restricted. When the knob 18 is pulled upward in this state, the lock lever 19 rotates counterclockwise against the biasing force of the spring 14, and the hook portion 19 is rotated.
The stride pin 12 engaged with the gear 3 is moved downward, the lock member 5 is rotated in the same direction, and the gear member 3 is disengaged from the gears 22a and 22b. Therefore, the back frame is in a free state, and when the back frame is rotated forward, the gears 25a, 25b of the lock member 5 face the next gears 22b, 22c of the gear member 3, and are engaged by the biasing force of the spring 14. do. As a result, the back frame becomes approximately upright with respect to the cushion frame (Fig. 6b), and the seat back 30 as shown in Fig. 5b.
is fixed to the seat cushion 31 in an upright position. Furthermore, pull the knob 18 upwards to shift gear 2.
When the meshing between the gears 5a, 25b and the gears 22b, 22c is released and the back frame is rotated forward, the locking member 5 is removed from the curved surface of the lower edge of the gear member 3, so that the gears are no longer meshed. In this state, the seat bag 30 is folded onto the seat cushion 31, thereby making it possible to fold the seat (FIGS. 5c and 6c. In this state, the arm plate is inserted into the stopper groove 23b of the gear member 3 The stopper pin 17 of No. 1 is inserted to regulate the forward tilting range. Seat back 3
0 can be raised up by raising the seat bag 30 and rotating it rearward. In such an operation, the lower end edge of the gear member 3 is curved downward, and the lock member 5 slides along this curved surface, so that it can climb over the gear member 3.
As a result, when the gears 25a, 25b of the lock member 5 oppose the gears 22b, 22c of the gear member 3,
Either of the gears 22c, 22 by the spring 14
b, meshes with 22a. Therefore, the state shown in FIGS. 5b and 6b can be restored.
In the above operation, the gears 25a and 25b of the lock member 5 are connected to the gears 22a and 22a of the gear member 3.
2b and 22c and on the right end side of the gear 22c. Therefore, during sliding, one of the gears 25a, 25b of the lock member 5 is connected to one of the gears 22a, 22b, 22b of the gear member 3.
22c, resulting in a half-locked state, which may result in the locking member 5 being unable to slide, that is, folding or raising the seat bag 30 becomes impossible. Therefore, in this embodiment, the flat part 2 of the gear member
4 is formed to be somewhat higher than the gears 22a, 22b, and 22c, and the lock member 5 slides along the flat portion 24 to avoid inadvertent meshing of the gears. Figures 7a and 7b show the sliding state of such a structure. As shown in the figure, the gears 25a, 25b of the locking member 5 slide against the flat part 24 of the gear member 3 during sliding, and there is no catching operation with the gears 22a, 22b, 22c, making it possible to prevent half-locking. ing.

In this embodiment, the gear member 3, that is, the gears 22a, 22b, 22 on the cushion frame side.
c and the gear 25 of the lock member 5 of the back frame.
a and 25b are formed intermittently, and the gears do not mesh in portions where they do not coincide with each other. Therefore,
Even if the gears are out of phase on both sides of the seat,
Since either one of the lock members and the gear member always meshes with each other, the seat back can be tilted smoothly. In addition, it is possible to lock in multiple stages, making it possible to obtain an angle that suits the sitting person's preference, and furthermore, the gears of the cushion frame are somewhat lower than the flat part formed between the gears. This structure prevents accidental engagement and reliably prevents the lock member from sliding, that is, from creating a half-locked state in which folding or raising the seat bag is impossible.

[Effects of the invention] As described above, in this invention, the gear that adjusts the seatback angle is formed intermittently through meshing, so even if the gears are out of phase on both the left and right sides of the seat, the locking operation will not be affected. There is no problem and locking at multiple angles is possible.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a side view of the main part, Figs. 3 and 4 are cross-sectional views of the main part, Fig. 5 a, b, c and Fig. 6 a,
7b and 7c are an overall external view and a side view of essential parts showing the operation, and FIGS. 7a and 7b are side views showing the relationship between the gears. 1...Arm plate (back frame), 3
... Gear member (cushion frame), 5 ... Lock member, 19 ... Lock lever, 22a, 22
b, 22c, 25a, 25b...gear, 10...
Wire (lock release member), 18...knob (lock release member).

Claims (1)

[Scope of utility model registration request] An intermittent gear provided on a cushion frame that pivotally supports the back frame, a lock member rotatably attached to the back frame and having an intermittent gear that meshes with the gear, and a lock member that is rotatably attached to the back frame. A lock lever that transmits power, a spring that biases the lock lever so that 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 via the lock lever. A seat angle locking device, characterized in that the gears of the cushion frame are formed to be somewhat lower than the flat portion formed between the gears.