JP2007302190A - Seat hinge hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat hinge hook capable of shifting a foldable vehicle-mounted seat from a folded state to a seatable state with a simple mechanical mechanism.
The present invention is a seat hinge hook (3) for holding a seat cushion and an in-vehicle seat in which a seat back can be folded in a seatable state, and connects the seat cushion and the seat back so as to be relatively rotatable. The bracket 2, the pin 3b provided on one side of the seat cushion or the seat back, and the relative rotation between the seat cushion and the seat back provided on the other side of the seat cushion or the seat back. The pin 3b is rotated by being pressed in accordance with the moving operation, and after the pin 3b is stored, the hook 3a is returned to the initial position and the pin 3b is locked. When 3b is pressed against the hook 3a, it is attached to the bracket 2 so that it can move to the back side.
[Selection] Figure 3

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 rotation shaft of the hook is pressed against the hook. It is characterized by being attached to the bracket so that it can move to the back side.

  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, sufficient rotational force does not act on the hook depending on the contact position between the pin and the hook. A sufficient rotational force acts on the hook when the pin comes into contact with the hook biased in the direction opposite to the rotation direction. Since the pin draws an arc orbit, when the pin is pressed against the hook and the hook moves to the back side, the pin comes in contact with the side opposite to the rotation direction of the hook and can be reliably rotated. Thus, rotation to the release position of the hook → pin storage → return to the locking position is performed more reliably, and the seat can be reliably 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 to 5 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 including a disc portion and a hook portion extending while being curved in the circumferential direction, and a notch for locking the pin 3b inside the hook portion. A portion 35 is provided. 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.

  The rotary shaft 30 is inserted through a long hole 21 formed in the bracket 2. The cross section of the rotating shaft 30 has a shape obtained by rounding a pair of opposing vertices of a square cross section. For this reason, the rotating shaft 30 is movable in the left direction in the figure from the state of FIG. This moving amount is actually about several millimeters. 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 an engaging portion 31 on the outer peripheral edge 33 of the hook portion described above, and one end of a spring 32 is attached to the engaging portion 31 portion. The other end of the spring 32 is fixed to the bracket 2. Therefore, the hook 3a is always urged by the spring 32 in the clockwise direction in FIG. 2 and rearward of the seat 1 (that is, in the initial position direction in both the rotational direction and the sliding direction). The hook 3a is configured not to rotate further in the clockwise direction than in the state of FIG. This is realized by the cross-sectional shape of the rotating shaft 30 and the hole height in the longitudinal direction of the long hole 21 in the drawing. As a result, the hook 3a does not rotate clockwise as compared with the state of FIG. 1 regardless of the position of the rotary shaft 30 in the long hole 21.

  The pin 3b is a metal column fixed to the seat back 1b (may be a cylindrical pipe). 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 pin 3b and the outer peripheral edge 33 of the hook portion of the hook 3a or the outer peripheral edge 34 on the tip side of the hook portion come into contact with each other (the state shown in FIG. 2). ). The contact position at this time is slightly shifted each time depending on the machining accuracy and assembly accuracy of each component of the sheet 1. If the pin 3b comes into contact with the outer peripheral edge 34 of the hook 3a as indicated by a one-dot chain line X in FIG. 2, the hook 3a is easily rotated in the release rotation direction (counterclockwise direction in FIG. 1). However, the pin 3b may come into contact with the outer peripheral edge 33 as shown in FIG.

  In this case, since the hook 3a is difficult to rotate in the release rotation direction, the hook 3a itself is moved to the far left side in FIG. 2 (arrow direction A in FIG. 2). Here, the locus of the pin 3b draws an arc, and the release rotation direction of the hook 3a is opposite to the arc locus of the pin 3b when the seat 1 is raised. For this reason, when the hook 3a is pushed by the pin 3b, the pin 3b draws an arc locus as shown in FIG. 3, so that the pin 3b opens in the above-described notch portion 35 of the hook 3a (in the direction of the arrow in FIG. 2). B), the contact position between the pin 3b and the hook 3a is biased to the opposite side to the rotation direction of the hook 3a and comes into contact with the outer peripheral edge 34.

  When the seat back 1b is further raised from this state, the hook 3a is rotated counterclockwise in the figure (see FIG. 4), and finally the tip of the hook portion of the hook 3a gets over the pin 3b. When the tip of the hook portion gets over the pin 3b, the hook 3a is moved to the right in the figure by the elastic restoring force of the spring 32 and rotated clockwise in the figure to return to the initial position in FIG. At this time, the pin 3b is in a state of being locked by the hook 3a (a state in which it is housed in the notch 20 of the bracket 2 and the notch 35 of the hook 3a) (see FIG. 5).

  As in this embodiment, when the pin 3b is pressed against the hook 3a and the hook 3a moves to the back side, the hook 3a can be rotated in the release direction. As a result, the hinge hook 3 can be reduced in size and weight, and the seat hinge hook can be operated with a simple mechanism without being restricted in design and 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 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. In this case as well, 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 expanded side view (operation | movement middle 1) of one Embodiment of the seat hinge hook of this invention. It is an enlarged side view (operation | movement middle period 2) of one Embodiment of the seat hinge hook of this invention. It is an expanded side view (at the time of operation | movement completion) of one Embodiment of the seat hinge hook of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 1a Seat cushion 1b Seat back 2 Bracket 20 (Bracket) notch 21 Long hole 3 Hinge hook 3a Hook 3b Pin 30 Rotating shaft 35 Notch (Hook)

Claims (5)

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,
The seat hinge hook according to claim 1, wherein the rotation shaft of the hook is attached to the bracket so as to be movable inward when the pin is pressed against the hook.   2. The seat hinge hook according to claim 1, wherein the hook has a notch portion for locking the pin, and the pin moves in an opening direction of the notch portion as it moves to the back side. .   The seat hinge hook according to claim 1, wherein the hook is biased toward an initial position by a spring.   The seat hinge hook according to any one of claims 1 to 3, wherein the hook is provided on a bracket fixed to either one of the seat cushion and the seat back.   The seat hinge hook according to claim 4, wherein one end of the spring is attached to an outer peripheral edge of the hook, and the other end is attached to the bracket.

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