JPH047840Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to the seat back of a vehicle seat such as an automobile, and in particular, to release the left and right lock claws on a bench seat type. Regarding seatbacks that can be moved forward.

(Prior Art) This type of bench seat type seat bag that can be folded forward is often of a double-sided locking type in which forward tilting lock claws are provided on the left and right sides in order to reliably lock the seat in the upright position. In the case of such a double-sided locking method, it is troublesome to unlock the left and right forward tilting lock claws individually.
It is necessary to link the left and right forward tilting lock pawls with each other by a connecting rod so that the left and right locks can be unlocked at the same time by rotating only one of them.

By the way, if the connecting rod that interlocks the left and right forward tilting lock claws is exposed on the back of the seat bag, it will look unsightly and spoil the design of the seat, and it will also cause problems for rear seat occupants. livability is not good.

Therefore, generally, the connecting rod is inserted into a lower back frame made of pipe or the like of the seat bag so as to be built into the seat bag.

In other words, FIG. 8 is a schematic diagram of the left side of a conventional general bench seat type seat back that can be folded forward, and 1 in the figure shows the entire seat back.
2 is a pad that is a cushion body made of urethane foam, and the outer skin is not shown. 3 is pad 2
A main back frame 4 having an overall horizontally elongated inverted U-shape is inserted into the main back frame 3, and a main back frame 4 is installed horizontally between both sides of the main back frame 3 by welding or the like via a bracket 5. The main back frame 3 and the lower back frame 4 are each constructed of a pipe-like member such as a steel pipe.

The seat bag 1 as a whole is caused to fall from a slightly rearward standing state to a substantially horizontal position forward (frontward It is provided so that it can be rotated within the range of the state in which it collapses.

Forward tilting lock claws 6 (not shown on the right side) are provided on the left and right sides of the seat bag 1, respectively, and the seat bag 1 is latched onto hooks at the rear of both sides of the seat by return springs (not shown).
The structure is such that the erected state is reliably locked. Further, a thin connecting rod 7 is provided to penetrate into the lower back frame 4, and both ends of this connecting rod 7 are connected to the left and right forward tilting lock claws 6 by welding or the like. They are interlocked with each other, and an operating piece 8 is provided upwardly projecting integrally with the forward tilting lock claw 6 on either the left or right side, and by pulling this operating piece 8 by hand in the direction of the arrow, the forward tilting to the left or right can be performed. Both locking claws 6 are connecting rods 7
The locks are simultaneously released via the locking mechanism, and the entire seat back 1 can be moved forward.

(Problems to be Solved by the Invention) By the way, in the seat bag 1 described above, the connecting rod 7 that interlocks the left and right forward tilting lock claws 6 is inserted into the lower bag frame 4, so the connecting rod 7 However, the connecting rod 7 inserted into the lower back frame 4 vibrates when the vehicle is running and comes into contact with the inner surface of the back frame 4, resulting in interference. There was a problem with the generation of noise (chattering noise), which caused passengers to feel uncomfortable and anxious.

This invention was developed in view of the above circumstances, and the connecting rods that link the left and right forward tilting lock claws are built in so that they are not exposed to the outside, improving the exterior design and improving the comfort of the rear seat occupants. To provide a seat bag which can securely prevent interference noise between a connecting rod and a back frame due to vibrations during traveling, and which does not give a passenger a feeling of discomfort or anxiety.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above object, the seat back of the present invention has a connecting rod that interlocks the left and right forward tilting lock claws with each other and is inserted into the circumferential wall of the back frame, so that the seat back is continuous or continuous in the longitudinal direction. Openings are made intermittently, and while the back frame is inserted into the pad foam mold, foam material is injected and foamed to integrally mold the pad, and at the same time, a portion of the foam material enters the back frame through the openings. It is characterized by having a structure in which the connection rod is prevented from contacting the inner surface of the peripheral wall of the back frame by foaming.

(Function) With the above configuration, the connecting rod is inserted into the back frame and is not exposed to the outside, improving the exterior design as well as the comfort of the rear seat occupants. Even if it vibrates, the foamed material infiltrates and foams around the connecting rod in the back frame, so the connecting rod is held by this.
The generation of contact interference sound (chattering sound) between the connecting rod and the inner surface of the back frame is prevented, and the problem of causing discomfort and anxiety to passengers is eliminated.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the figure, the same reference numerals are given to the same components as those in FIG. 8 described above to simplify the explanation, and the bracket 5, forward tilting lock pawl 6, and operation piece 8 shown in FIG. 8 have been changed. Since there is no such thing, illustration is omitted.

First of all, Fig. 2 is a partially cutaway schematic diagram of the seat back 1, which is inserted into a pad 2 made of a cushion body such as urethane foam, and has a main back frame 3 which has an overall horizontally elongated inverted U shape. , and a lower back frame 14 which is fixed to both sides of the main back frame 3 in a horizontal manner. The main back frame 3 and the lower back frame 14 are each constructed from a pipe-shaped member such as a steel pipe. Note that 10 in the figure is a spring for improving cushioning properties. In addition, there are eighth marks on both left and right sides of the seat bag 1.
As shown in the figure, a forward tilting lock pawl (not shown) is provided respectively, and a connecting rod 7 (see FIGS. 1 and 3) that interlocks the left and right forward tilting lock pawls with each other is inserted into the lower back frame 14. It is installed by penetrating the. The process up to this point is the same as that shown in FIG.

Here, the lower back frame 14 into which the connecting rod 7 is inserted has a horizontally elongated opening 14a formed in the peripheral wall continuously in the longitudinal direction. This lower back frame 14 is attached to the main back frame 3.
and assemble it as a frame of a seat bag by connecting it with the spring 10 and stretching the spring 10 between them,
Further, the connecting rod 7 for interlocking the left and right forward tilting lock claws described above is inserted into the inside, and in this state, the pad 2 is inserted into a foam mold (not shown). Then, by injecting and foaming a foaming material into the mold, the pad 2 is integrally molded so as to wrap around the back frames 3 and 14, and the pad 2
During foam molding, a portion 2a of the foam material enters into the lower back frame 14 through its opening 14a and foams, surrounding the connecting rod 7.

In the seat bag configured as described above, the connecting rod 7 is inserted into the lower bag frame 14 and is not exposed to the outside, thereby improving the exterior design and the comfort of the rear seat occupant. In addition, since a portion of the foam material 2a is infiltrated and foamed around the connecting rod in the lower back frame 14, even if the connecting rod 7 vibrates as the vehicle travels, the connecting rod 7 will not touch the foam material 2a. It is held from the surroundings, and the generation of contact interference sound (chattering sound) with the inner surface of the lower back frame 14 is prevented, eliminating the problem of causing discomfort or anxiety to the passenger. Furthermore, the lower back frame 1
Instead of specifically injecting and foaming the foaming material into the pad 4, a part of the foaming material is inserted through the opening 14a and foamed simultaneously with the foaming of the pad 2, which has the advantage of saving troublesome labor.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, the lower back frame 14 may be
It is also possible to use configurations as shown in FIGS. 7 to 7.

In other words, the back frame 24 shown in FIG. 4 has a round pipe shape, and a plurality of openings 24a are formed intermittently at appropriate intervals in the longitudinal direction of the peripheral wall.

The back frame 34 shown in FIG. 5 has a plurality of openings 34 disposed intermittently at appropriate intervals in the longitudinal direction on the circumferential wall of a round pipe-shaped object and offset from each other in the circumferential direction.
It is formed by forming a.

The back frame 44 shown in FIG. 6 has a rectangular pipe shape with a plurality of openings 44a formed intermittently at appropriate intervals in the longitudinal direction of the peripheral wall thereof.

The back frame 54 shown in FIG. 7 is made of lip channel steel (or simply channel steel), and has an opening 54a throughout the longitudinal direction.

The same effect as described above can be obtained by using any of the above-mentioned back frames 24 to 54.

[Effect of idea]

Since the present invention has been made as described above, the connecting rod that interlocks the left and right forward tilting lock pawls is built in so as not to be exposed to the outside, thereby improving the exterior design and the comfort of the rear seat occupants. Furthermore, the seat back can reliably prevent the generation of interference noise between the connecting rod and the back frame due to vibrations during running, and provide a seat back that does not cause discomfort or anxiety to the passenger.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a sectional view of the main parts, Figure 2 being a partially cutaway schematic perspective view of the entire seat bag, and Figure 3 being a cross-sectional view of the main part. Cross-sectional views along the - line in Figure 2, Figures 4 to 7
The figures are perspective views of different back frames showing other embodiments of the present invention, and FIG. 8 is a schematic perspective view of one side portion of a seat back showing a conventional example. 1... Seat back, 2... Padded, 2a...
A portion of the foam material that has entered the back frame,
3... Main back frame, 14, 24, 3
4, 44, 54...lower back frame, 14
a, 24a, 34a, 44a, 54a...opening,
6...Forward tilting lock claw, 7...Connecting rod, 8...Operation piece.

Claims (1)

[Scope of utility model registration request] In a seat back in which a connecting rod for interlocking the left and right forward tilting lock claws is inserted through the back frame, openings are provided continuously or intermittently in the longitudinal direction in the peripheral wall of the back frame, and the back frame is formed by pad foam molding. While inserting the foam material into the mold, the pad is integrally molded by injecting and foaming the pad, and at the same time, a portion of the foam material is introduced into the back frame through the opening and foamed, thereby attaching the connecting rod to the inner surface of the peripheral wall of the back frame. A seat bag characterized by having a structure that prevents contact.