JPH0731723Y2 - Car seat headrest - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a headrest of an automobile seat.

[Conventional technology]

2. Description of the Related Art Conventionally, as a headrest of a vehicle seat, a so-called swing type headrest is known in which the headrest body is tiltable around a horizontal axis (see, for example, Japanese Utility Model Laid-Open No. 62-107755).

As a swing type headrest, the swing mechanism is generally a frame, a support pole attached to the frame so as to be rotatable about a horizontal axis, and the frame is held at a desired rotation position about the horizontal axis with respect to the support pole. As described above, the spring means for imparting rotation resistance and a pair of stoppers for restricting the rotation range of the frame on the rearward tilt side and the forward tilt side are basically configured, and the frame is covered with a cushion material. It is known that the above is coated.

[Problems to be solved by the device]

In order to assemble the swing mechanism in the swing type headrest, a support pole is attached to the frame so as to be rotatable about a horizontal axis, spring means is attached between the support pole and the frame, and a pair of stoppers are attached. It is necessary to attach it by welding or the like. Therefore, there is a problem that the assembling work is troublesome.
Also, after covering the above frame with cushioning material, it is necessary to attach a holding plate to the bottom surface of the headrest body so that the edge of the skin covering this cushioning material does not flutter. There is also the problem of cost.

In blow molding of the frame with synthetic resin, it is also possible to insert the upper end of the support pole, to which the swing mechanism and the like have been previously assembled, into the molding die, thereby integrally forming the frame and the swing mechanism. However, in this case, the above-mentioned insert processing work is troublesome.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to provide a headrest for an automobile seat in which the respective constituent members can be easily and surely assembled.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, in a headrest of an automobile seat, which comprises a headrest body and a support pole that tiltably supports the headrest body, the support pole includes a pair of vertical rods and a vertical rod. The headrest body is composed of a synthetic resin frame and a lower surface of the frame, which is composed of a bending rod portion that continuously bends forward from the upper end of the rod portion and a horizontal rod portion that connects the front ends of the bending rod portion to each other. Has a spring plate attached to, and opens downward on the lower surface of the frame,
A recess for accommodating the horizontal rod portion and the bending rod portion is formed,
The spring plate is disposed between the main body portion that covers the lower surface of the recess, the folding piece that is continuously bent backward from the front end of the main body portion, and the rear end portion of the folding piece and the main body portion. , A bush that keeps a mutual gap between them constant, and a connecting means that connects the folded piece and the main body portion to each other via the bush, and the vertical rod portion is provided in the front-rear direction at the rear portion of the spring plate. An elongated hole penetrating so as to be relatively movable is formed, and the horizontal rod portion is arranged between the main body portion of the spring plate and the folded piece in a state where a clamping force is applied by both, and the horizontal rod portion is By being sandwiched between the main body of the spring plate and the folded piece, the upper edge of the bending rod contacts the lower surface of the recess, and the rearward tilted state in which the rotation of the rearward tilted side of the frame is restricted, The lower edge of the bending rod is in contact with the edge of the elongated hole of the spring plate and is held so as to be rotationally displaceable between the forward tilted state in which rotation of the frame on the forward tilt side is restricted. .

[Action]

According to the above structure, the rotation range of the frame is restricted by the lower surface of the frame and the elongated hole of the spring plate, and thus no special stopper is required. Further, since the spring plate covers the recess on the lower surface of the frame, the skin does not move to the recess by the spring plate and flap.

〔Example〕

In FIG. 1, a headrest 1 is a headrest body 2
And a support pole 3 and a spring plate 4. The headrest body 2 is a frame 5,
Cushion material 6 covered on the outer peripheral surface of the frame 5
And a skin 7 covered with the cushion material 6.

As shown in FIGS. 1 and 2, the frame 5 is a pillow-shaped hollow frame having a substantially triangular shape in a side view, and is formed by blow molding using a synthetic resin. In this frame 5,
Recessed mounting portions 51, 52 are formed in the lower part of the front and rear surfaces, and a recess 53 (shown only in FIG. 1) opening in the lower surface is formed in the lower surface.

The support pole 3 includes a pair of left and right vertical rods 31, a bending rod 32 that bends forward from the upper end of the vertical rod 31, and a horizontal rod 33 that connects the front ends of the bending rod 32 to each other. It is bent and formed.

The spring plate 4 is formed of a plate-shaped spring material, and has a main body portion 41 that covers the lower surface of the frame 5 and a folding piece that is continuously bent backward from the front end of the main body portion 41.
42, a bush 43 and a rivet (connecting means) that regulate the rear end portion of the folded piece 42 and the main body portion 41 at a predetermined interval.
It consists of 44 and.

Concave surface portions 411, 421 are formed on the opposing surfaces of the main body portion 41 and the folded piece 42 so as to face each other, and the shape of the pair of concave surface portions 411, 421 is set so as to be in contact with the outer peripheral surface of the horizontal rod portion 33. Has been done. Further, between the rear end portion of the folding piece 42 and the main body portion, a non-compressible bush 43 made of metal or the like is arranged, and a rivet 44 is penetrated through the bush 43
By crimping the end portion of the rivet 44, the body portion 41 and the folded piece 42 are fastened via the bush 43. Depending on this, the main body 41 and the folding piece 42
Are kept at a predetermined interval corresponding to the height of the bush 43.

The horizontal rod portion 33 is arranged between the pair of concave surface portions 411 and 421,
The spring plate 4 is rotatably coupled around the horizontal rod portion 33 by being sandwiched by the concave surface portions 411 and 421. Since the main body 41 of the spring plate 4 and the folded piece 42 are held at a predetermined interval by the bush 43 and the rivet 44, a predetermined pinching force acts on the horizontal rod 33, and the pinching force is applied by the pinching force. A predetermined contact friction resistance force acts between the outer peripheral surface of the horizontal rod 33 and the concave surface portions 411 and 421.

An elongated hole 45 into which the vertical rod portion 31 of the support pole 3 is inserted is formed in the rear portion of the main body portion 41. The vertical rod portion 31 is inserted into the elongated hole 45, and the horizontal rod portion 33 is formed into the pair of horizontal rods 33. Concave part 41
The spring plate 4 is attached to the frame 5 by screws 81, nuts 82, and rivets 83 while being held between 1,421. The screw 81 is inserted upward through a through hole 46 formed in the main body portion 41 of the front end portion of the spring plate 4 and penetrates the folding piece 42 and the mounting portion 52 of the frame 5, and the rivet 83 is connected to the spring plate 4 by the rivet 83.
The rear end portion and the mounting portion 51 are penetrated and the end portion is caulked. As shown in FIG. 2, a dowel 811 is formed on the inner surface of the head of the screw 81, and the dowel 811 and a recessed hole (not shown) formed on the inner surface of the folded piece 42 are fitted to each other. By doing so, the screw 81 is prevented from rotating.

A locking edge 47 is bent and formed on the rear edge of the spring plate 4, and the locking edge 47 is formed in the groove 53 formed in the frame 5.
By being fitted in 1, the movement restriction in the front-back direction and the positioning when crimping the rivet 83 are performed.

When the spring plate 4 is attached to the frame 5, the frame 5 is connected to the horizontal rod 33 so as to be rotatable around the horizontal rod 33, and the contact friction resistance force acting between the frame 5 and the horizontal rod 33. Thus, the frame 5 is held at a desired rotation position around the horizontal rod 33.

The frame 5 and the support pole 3 rotate rearwardly around the horizontal rod 33 of the frame 5 when the inner surface of the recess 53 and the upper edge of the bending rod 32 contact each other (in the clockwise direction in FIG. 1). The rotation of the headrest body 2 is restricted, and the headrest main body 2 is held in the backward tilted state. Further, the inner edge of the oblong hole 45 of the spring plate 4 and the lower edge of the bending rod portion 32 contact each other, whereby the rotation of the frame 5 on the forward tilt side (counterclockwise rotation in FIG. 1) is restricted, whereby the headrest. The main body 2 is held in a tilted state. The size of the elongated hole 45 is set so that the spring plate 4 can move relative to the vertical rod 31 between the forward leaning state and the backward leaning state of the headrest 21.

After covering the outer peripheral surface of the cushion member 6 with the skin 7,
Its end is guided along the lower surface of the spring plate 4, and this end is connected to each other by a locking member 71.

Reference numeral 48 in FIGS. 1 and 2 denotes an escape hole, which is penetrated so that the bending rod portion 32 of the support pole 3 and the spring plate 4 do not come into contact with each other when the headrest body 2 is tilted forward. It was formed.

In the above structure, the headrest main body 2 is normally set in a rearward tilted state. In this rearwardly tilted state, the upper edge of the bending rod 32 of the support pole 3 and the lower surface 532 of the recess 53 of the frame 5 contact each other, whereby the headrest 2 is restricted from further rotating to the rearwardly tilted side. As a result, even if the head of the seated person hits due to an unexpected impact, the head can be supported. Further, since the horizontal rod portion 33 is held by the pinching force from the spring plate 4 so as not to rotate forward, the headrest body 2 is securely held in the backward tilted state.

Further, by rotating the headrest main body 2 around the horizontal rod portion 33 to the forward tilt side, the inner edge of the elongated hole 45 of the spring plate 4 comes into contact with the lower edge of the bending rod portion 32, and further rotation on the forward tilt side is restricted. The headrest body 2 is tilted forward. Even in this state, since the horizontal rod portion 33 is held by the spring plate 4 so as not to rotate backward, the headrest body 2 is reliably held in the forward tilted state.

Further, even if the rotation operation of the headrest main body 2 is stopped at a desired rotational position between the forward tilted state and the rearward tilted state, the position is ensured by the contact frictional force of the spring plate 4 acting on the horizontal rod portion 33. Held in.

In order to assemble the headrest 1 of this embodiment, first, the vertical rod portion 31 of the support pole 3 is attached to the elongated hole 45 of the spring plate 4.
The horizontal rod 33 is held by the spring plate 4 and the spring plate 4 in this state may be attached to the lower surface of the frame 5. The horizontal rod portion 33 is held by arranging the horizontal rod portion 33 between the concave surface portions 411 and 421 of the folded piece 42 of the spring plate 4 and the main body portion 41 and tightening the rivet 44 with the bush 43 interposed therebetween. Should be regulated. Further, the spring plate 4 is mounted by mounting the rear end of the spring plate 4 on the frame 5 with the rivet 83, passing the front end of the screw 81 through the insertion hole 46 through the mounting portion 52, and using the nut 82. Complete by tightening. Then, the cushion material 6 and the outer skin 7 are covered around the frame 5, and the ends of the outer skin 7 are locked to each other by the locking members 71, whereby the assembly of the headrest 1 is completed.

In this assembly, the rivet 83, the screw 81, the nut 82, and the like are used as the mounting means between the respective constituent members such as the frame 5, and the means by welding is not used. Therefore, the mounting work can be easily performed. At the same time, the quality can be stabilized because there is no variation in welding.
In addition, the frame 5 is used to regulate the tilting range of the headrest body 2.
Since it is performed by the lower surface 532 of the recess and the inner edge of the elongated hole 45 of the spring plate 4, the stopper in the conventional swing-type headrest can be omitted,
As a result, the number of parts can be reduced and the assembling work can be saved.

Further, since the outer skin 7 on the lower surface of the headrest body 2 can be arranged along the lower surface of the spring plate 4, it is possible to prevent the outer skin 7 from fluttering, and to prevent the outer skin 7 from fluttering in the conventional headrest. The plate can be omitted. This also makes it possible to reduce the number of parts and save labor in assembling work.

Further, in this embodiment, the rear end portion of the folding piece 42 and the body portion 41 are
By connecting and via the bush 43, it is possible to reliably set the mutual distance between them to a predetermined amount, and thus to reliably provide a predetermined amount as a contact frictional force that is a rotational resistance around the horizontal rod portion 33. can do. As a result, variations due to assembly can be reliably prevented, and a headrest having a swing function of a constant quality can be reliably assembled.

Moreover, it is not necessary to perform the insert processing work of the support poles or the like when the frame 5 is blow-molded, and the labor required for this insert processing work can be omitted.

As described above, in this embodiment, the number of parts is reduced, so that the labor of the assembling work can be reduced and the assembling work can be easily and surely performed.

In the above embodiment, the rivet 83 is used to connect the spring plate 4 and the frame 5, but the invention is not limited to this, and a screw and a nut may be used, for example. Further, although the bush 43 is fastened by the rivet 44, the bushing 43 is not limited to this, and may be fastened by using, for example, a screw.

[Effect of device]

As described above, according to the headrest of the vehicle seat of the present invention, the rotation range of the frame is restricted by the lower surface of the frame and the elongated hole of the spring plate, and therefore, it is not necessary to attach a special stopper, and Since the spring plate covers the recess on the lower surface of the frame, it is possible to prevent the skin from fluttering.
Therefore, the member for preventing the flutter can be omitted. Moreover, by assembling the horizontal rod part to the spring plate via the bush, a predetermined contact frictional force can be reliably applied, and the holding performance of the rotational position of the headrest body can be surely made to have a constant quality. You can Therefore, according to this invention, it is possible to reduce the number of parts, which makes it possible to save labor in the assembling work and to easily and surely perform the assembling work.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a main body, a support pole and a spring plate. 1 ... Headrest, 2 ... Headrest body, 3 ...
Support pole, 4 ... Spring plate, 5 ... Frame, 31 ... Vertical rod, 32 ... Bending rod, 33 ... Horizontal rod, 41 ... Main body, 42 ... Folding piece, 43 ... bush,
44 …… Rivets, 45 …… Oval holes, 53 …… Recesses.

Claims (1)

[Scope of utility model registration request] 1. A headrest for an automobile seat, comprising a headrest body and a support pole for tiltably supporting the headrest body, wherein the support pole is continuous with a pair of vertical rods and an upper end of the vertical rods. And a horizontal rod that connects the front ends of the bent rods to each other, and the headrest body is made of a synthetic resin frame and a spring plate attached to the lower surface of the frame. And a recessed portion that opens downwardly and that accommodates the horizontal rod portion and the bent rod portion is formed in the lower surface of the frame, and the spring plate includes a main body portion that covers the lower surface of the recessed portion, and a main body portion of the main body portion. A folding piece that is continuously bent backward from the front end, and a bushing that is arranged between the rear end portion of the folding piece and the main body portion and that keeps the mutual distance between them constant. And a connecting means for connecting the folded piece and the main body portion to each other via the bush, and a long hole is formed in the rear portion of the spring plate through which the vertical rod portion is relatively movable in the front-rear direction. The horizontal rod is disposed between the main body of the spring plate and the folded piece in such a manner that a clamping force is applied between the main body and the folded piece. And the upper edge of the bending rod is in contact with the lower surface of the recess so that rotation of the frame on the rearward tilt side is restricted, and the lower edge of the bending rod is longer than the spring plate. A headrest for an automobile seat, which is held so as to be rotationally displaceable between a forward tilted state in which rotation of a forward tilted side of the frame is restricted by being in contact with a hole edge of a hole.