JP4923721B2 - Seat hinge hook - Google Patents

Description

  The present invention relates to a seat hinge hook that holds a seat cushion and a seat back in a seatable state in an in-vehicle seat in which a seat cushion and a seat back can be folded.

Some seats mounted on a vehicle can fold a seat cushion and a seat back. Such a seat is provided with a mechanism for maintaining the positional relationship between the seat cushion and the seat back when the seat is brought into a seatable state from the folded state. There are various types of such holding mechanisms, but the following [Patent Document 1] describes a mechanism for fixing the seat back to the vehicle interior wall.
In addition to the holding mechanism as described above, there is a type in which a hinge hook is provided at the hinge portion between the seat cushion and the seat back, and the seatable state is maintained by the hinge hook. The hinge hook is attached to one of the seat cushion and the seat back, and maintains a seatable state by locking a pin provided on the other of the seat cushion or the seat back.

  When the seat is moved from the folded state to the seatable state, the hinge hook is required to function reliably, and it is desired that the provision of the hinge hook does not become a design or design restriction. It is requested. For example, when the seat is shifted from the folded state to the seatable state, the hook is moved by the pin using the operation of opening the seat to lock the pin to the hook. And the seatable state is not reliably maintained. In addition, if the size of the hook is increased in order to optimize the contact angle between the two in order to move the hook with the pin, it becomes a design and design constraint. Accordingly, an object of the present invention is to hold the seatable state by shifting the seat cushion and the seat back of the foldable vehicle-mounted seat from the folded state to the seatable state with a simple mechanical mechanism. It is to provide a seat hinge hook that can be used.

The present invention is a seat hinge hook that holds a seat cushion and a seat back in a seatable state with a seat cushion and a seat back that can be folded. The seat cushion and the seat back can be rotated relatively. A bracket connected to the seat, a pin provided on one side of the seat cushion or the seat back, and a relative rotation between the seat cushion and the seat back provided on the other side of the seat cushion or the seat back. It is provided with a hook that rotates when the pin is pressed in accordance with the moving operation, stores the pin and then returns to the initial position and locks the pin, and the pin is inserted into the shaft portion. Do and a rotatable cylindrical sleeve relative to the shaft portion Te Ri, further, relative to the said sheet Tsu transfection with the seat back With the dynamic operation, the contact earlier and the pin and the hook, and comprising the pre-rotation mechanism for rotating the sleeve in the release direction of the hook.

  In the seat having the seat hinge hook of the present invention, the seat cushion and the seat back are held in a seatable state by the pin and the hook. At the time of transition from the folded state of the seat cushion and the seat back to the seatable state, the hook is temporarily rotated to the release position by the contact between the pin and the hook, and then the hook is returned to the locked state after the pin is stored. At this time, the hook rotates when the pin is pressed, but the pin is constituted by a rotating shaft and a sleeve in order to perform the rotation more reliably. In this way, when the pin comes into contact with the hook, the sleeve rotates and it becomes easy to rotate the hook in the release direction, and the rotation of the hook to the release position → the storage of the pin → the lock position Thus, the seat can be shifted to the seatable state. According to the seat hinge hook of the present invention, it is not necessary to increase the shape of the hook for the reliable operation of the hinge hook, and the state is shifted from the folded state to the seated state more reliably by a simple mechanical mechanism. Thus, the seatable state can be maintained.

  Hereinafter, an embodiment of a seat hinge hook according to the present invention will be described with reference to the drawings. FIG. 1 shows a side view (side view from the left side of a vehicle) of an in-vehicle seat 1 provided with a hinge hook according to the present embodiment. This seat is set as a third seat of a one-box car, and the seat back 1b can be folded with respect to the seat cushion 1a. In FIG. 1, illustration of legs attached to the frame of the seat cushion 1a is omitted.

  Brackets 2 are respectively attached to both rear side surfaces of the seat cushion 1a. This bracket 2 incorporates a hinge hook 3 for holding the seat 1 in a seatable state. The hinge hooks 3 are respectively incorporated inside the pair of brackets 2. 2 and 3 are views of the hinge hook 3 on the right side of the seat 1 as viewed from the seat cushion 1a side (inner side).

  In the present embodiment, the bracket 2 is fixed to the seat cushion 1a, and the seat back 1b is attached to the bracket 2 so as to be rotatable about the rotation shaft 2a. The hinge hook 3 includes a hook 3a and a pin 3b. The hook 3a is attached to the bracket 2, but the pin 3b is projected from the side surface of the seat back 1b.

  First, the structure of the hinge hook 3 will be described in detail below with reference to FIG. The hook 3a is a metal plate, and has a shape composed of a disk portion and a hook portion that extends while being curved in the circumferential direction. The hook 3a is rotatably attached to the bracket 2 via a rotation shaft 30 at the center of the disk portion. The rotating shaft 30 is fixed to the hook 3 a and is also coupled to the hook 3 a on the opposite side of the seat 1. Although not shown, levers are attached to both outer end portions of the rotating shaft 30. When the seat 1 is folded from the seatable state, by operating this lever, the pair of hooks 3a can be simultaneously rotated in the release direction.

  The hook 3a has a locking portion 31 on the outer peripheral edge of the hook portion described above, and one end of a spring 32 is attached to the locking portion 31 portion. The other end of the spring 32 is fixed to the bracket 2. For this reason, the hook 3a is always urged clockwise by the spring 32 in FIG. The hook 3a is configured not to rotate further in the clockwise direction than in the state of FIG. For example, the rotation shaft 30 is provided with a mechanism for restricting rotation, or a convex portion that abuts on the locking portion 31 is provided on the bracket 2 so that the rotation is prevented from rotating further clockwise than in the state of FIG. ing.

  The pin 3 b includes a metal shaft portion 33 fixed to the seat back 1 b and a cylindrical metal sleeve 34 that is rotatably inserted into the shaft portion 33. The end portion of the shaft portion 33 has a hook shape (not shown) so that the sleeve 34 cannot be removed. In the figure, the difference between the outer diameter of the shaft portion 33 and the inner diameter of the sleeve 34 is shown to be large, but in practice it is preferably about a few millimeters, and the rotation of the sleeve 34 is made smooth between the two. Therefore, it is preferable to apply oil or fill grease. In addition, the bracket 2 is formed with a notch 20 for locking the pin 3b together with the hook 3a described above when the seat 1 is ready to be seated.

Next, the operation of this embodiment will be described with reference to FIGS. When the seat back 1b is raised from the state in which the seat 1 is folded, the sleeve 34 of the pin 3b and the outer peripheral edge of the hook portion of the hook 3a come into contact with each other (state in FIG. 1). When the seat back 1b is further raised from this state, the sleeve 34 rotates in the direction of the arrow in FIG. 2 due to the arc locus drawn by the pin 3b. The rotation of the sleeve 34 acts to rotate the hook 3a in one direction in the figure, and shifts to a state as shown in FIG. When the seat back 1 b is further raised from this state, the pin 3 b is accommodated in the notch 20, and the hook 3 a is returned to the initial state by the spring 32. As a result, the pin 3b is locked by the hook 3a.

If here provided as a simple cylindrical pins without providing a component such as a sleeve 34, the friction at the time of contact between the pin and the hook is increased, as shown to hook in Figure 2 by a dashed line X forms As a result, the action force due to the contact between the pin and the hook must be increased in the hook rotation direction. Moreover, not only the shape of the hook but also the angle of entry of the pin with respect to the hook is restricted, so that there are many restrictions on the positional relationship between the pin and the hook. By doing so, it becomes necessary to increase the size of the hook, resulting in space and design restrictions. This also creates design constraints.

  The hook 3a can be rotated in the releasing direction by providing the sleeve 34 as in the present embodiment and rotating the sleeve 34 when the pin 3b and the hook 3a contact each other. As a result, the seat hinge hook can be operated with a simple mechanism without being restricted in design or design. Since the seat hinge hook portion can be made compact, even when a resin cover or the like is attached to the outside of the bracket 2, the design can be designed with almost no design restrictions.

In order to facilitate rotating the hook 3a by rotation of the sleeve 34, and Do etc. to form fine irregularities on the contact edge of the sleeve 34 of the outer peripheral surface and the hook 3a of the sleeve 34, the hook 3a by rotation of the sleeve 34 You may give the device which makes it easy to rotate. Fine irregularities may be positively formed by pressing or cutting, and the hooks 3a and the like may be formed by, for example, omitting the sanding process of the peripheral portion after punching the metal plate.

  FIG. 4 shows another embodiment of the seat hinge hook of the present invention. This embodiment is also basically the same as the embodiment of FIGS. 2 and 3 described above, but the rotation of the hook 3a can be realized more smoothly by rotating the sleeve 34 before contact with the hook 3a. It is something to try. In addition, the same code | symbol is attached | subjected to the component same or equivalent to embodiment mentioned above, and the detailed description is abbreviate | omitted.

  In the present embodiment, the notch 20 is formed so that the inner upper edge 20 a of the notch 20 contacts the sleeve 34. For this reason, the sleeve 34 has been rotated in the direction of the arrow in FIG. 4 before contacting the hook 3a, and simultaneously rotates the hook 3a in the releasing direction when contacting the hook 3a. And while the pin 3b moves to the back of the notch 20, the sleeve 34 comes into contact with the inner upper edge 20a and its rotation is promoted, thereby further rotating the hook 3a in the releasing direction. By doing in this way, the mechanism which makes the seat 1 a seatable state more reliably can also be constructed | assembled.

  That is, a pre-rotation mechanism (sleeve) that contacts the sleeve 34 before the contact between the pin 3b and the hook 3a and rotates the sleeve 34 in the releasing direction of the hook 3a as the pivotable seat cushion 1b rotates. 34 is further provided, the operation of the hook 3a can be ensured, and the seat 1 can be more reliably seated. By using the pre-rotation mechanism as the bracket 2 that contacts the sleeve 34 (specifically, in the above embodiment, the inner upper edge 20a of the notch 20), the pre-rotation mechanism can be constructed with a simple structure.

  In the embodiment described above, the seat back is rotatably attached to the bracket, and further, a pin is provided on the seat back side. However, even when the seat back is pivotably attached to the bracket, the same effect can be obtained by providing a hinge hook (and corresponding part of the bracket notch) on the seat back side and providing a pin on the bracket side. can get. In this case, although not shown in the drawing, it is sufficient that the pin and the hinge bracket are replaced with each other so that the hinge bracket can be easily rotated in the release direction by the sleeve.

  Alternatively, the same can be done for a structure in which the bracket is fixed to the seat back and the seat cushion is rotatably attached to the bracket. Also in this case, there are two possible cases: a case where a pin is provided on the seat cushion and a case where a hinge bracket is provided. Although not shown in these cases, it is sufficient that the hinge bracket is easily rotated in the release direction by the sleeve in any case.

  In the embodiment described above, the hinge hooks 3 are provided on both sides of the seat 1. This is preferable because the seatable state can be more securely fixed (especially preferable for a seat on which a plurality of persons can sit) because the seat width is wide. However, the hinge hook 3 is provided only on one side of the seat 1. Good.

It is a side view of the sheet | seat provided with one Embodiment of the seat hinge hook of this invention. It is an expanded side view (operation initial stage) of one Embodiment of the seat hinge hook of this invention. It is an enlarged side view (middle operation | movement) of one Embodiment of the seat hinge hook of this invention. It is an enlarged side view (operation initial stage) of other embodiment of the seat hinge hook of this invention.

Explanation of symbols

1 Seat 1a Seat cushion 1b Seat back 2 Bracket 20 Notch 20a Inner upper edge (pre-rotation mechanism)
3 Hinge hook 3a Hook 3b Pin 33 Shaft 34 Sleeve

Claims (3)

A seat hinge and a seat hinge hook that folds a seat cushion and a seat back, and holds the seat cushion and the seat back in a seatable state.
A bracket that rotatably connects the seat cushion and the seat back;
A pin provided on one side of the seat cushion or the seat back;
Provided on the other side of the seat cushion or the seat back, the pin is pushed by the relative rotation of the seat cushion and the seat back, and rotates to store the pin And a hook for returning to the initial position and locking the pin,
Said pin, and a shaft portion, a sleeve rotatable cylindrical respect is inserted into the shaft portion shaft portion, Ri Tona,
Further, a pre-rotation mechanism is provided for rotating the sleeve in the direction of releasing the hook before the pin and the hook are brought into contact with the relative rotation of the seat cushion and the seat back. Features a seat hinge hook. The seat hinge hook according to claim 1, wherein the pre-rotation mechanism is the bracket that can contact the sleeve . 3. The seat hinge hook according to claim 1, wherein the hook is provided on a bracket fixed to either one of the seat cushion and the seat back . 4.

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