CA2238853C - Headrest for automotive seat - Google Patents
Headrest for automotive seat Download PDFInfo
- Publication number
- CA2238853C CA2238853C CA002238853A CA2238853A CA2238853C CA 2238853 C CA2238853 C CA 2238853C CA 002238853 A CA002238853 A CA 002238853A CA 2238853 A CA2238853 A CA 2238853A CA 2238853 C CA2238853 C CA 2238853C
- Authority
- CA
- Canada
- Prior art keywords
- sealing
- headrest
- connecting frame
- cover assembly
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 79
- 238000005187 foaming Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000006260 foam Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1257—Joining a preformed part and a lining, e.g. around the edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/58—Seat coverings
- B60N2/5891—Seat coverings characterised by the manufacturing process; manufacturing seat coverings not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3023—Head-rests
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
A generally annular or donut-like headrest for use on an automotive seal is formed by a donut-like trim cover assembly having an opening, a generally "U" shaped headrest frame and a sealing and connecting frame. These parts are integrally joined using a foaming process. The headrest frame is placed in the donut-like trim cover assembly, with two stay portions thereof projecting outwardly from the opening. The sealing and connecting frame has a groove and is connected between the two stay portions. The edge forming the opening fits into the groove, which effectively prevents leakage of a liquid foaming base material through the opening during the foaming process. A location element is provided on the two stay portions for locating the sealing and connecting frame at a predetermined point thereon and correctly relative to the opening of trim cover assembly. This facilitates ease of precise assembling and forming of the headrest before the foaming process.
Description
-1_ HEADREST FOR AUTOMOTIVE SEAT
The present invention relates to a headrest for use on an automotive seat.
In particular, this invention is directed to a headrest wherein a headrest frame is inserted into a three-dimensional trim cover assembly of a given headrest shape, through an opening defined therein. After insertion, a liquid foaming base material is injected in the trim cover assembly, and the subsequent foaming integrally joins the frame and trim cover assembly together. More particularly, the present invention is directed to a donut-like or generally annular headrest having a through-hole therein, which headrest is formed by a foaming process of this kind.
In a process for forming a donut-like or annular headrest for use on an automotive seat, there is usually found a method that requires using a bent headrest frame with headrest stays) and inserting it into and along the annular hollow inside of a preformed three-dimensional donut-like trim cover assembly.
Subsequent thereto, a liquid foaming base material is injected into the trim cover assembly and cured therein with the headrest frame in place. A resulting foamed donut-like headrest unit is obtained, with the headrest stays) projected therefrom.
This process, however, has encountered a technical difficulty in terms of how the headrest frame can be easily placed in the preformed donut-like trim cover assembly for the subsequent foaming process. Some solutions to this problem have been proposed, for example, those disclosed in the Japanese laid-open patent publication Nos. 62-257818 and 9-271425, and also in the Japanese granted Patent Pub. No. 4-401818. These documents commonly suggest that a generally inverted U-shaped headrest frame with headrest stays be inserted in the preformed donut-like trim cover assembly, and then, a connecting frame be connected between two side frame sections of such headrest frame, to thereby provide an annular frame portion extending in and along the donut-like trim
The present invention relates to a headrest for use on an automotive seat.
In particular, this invention is directed to a headrest wherein a headrest frame is inserted into a three-dimensional trim cover assembly of a given headrest shape, through an opening defined therein. After insertion, a liquid foaming base material is injected in the trim cover assembly, and the subsequent foaming integrally joins the frame and trim cover assembly together. More particularly, the present invention is directed to a donut-like or generally annular headrest having a through-hole therein, which headrest is formed by a foaming process of this kind.
In a process for forming a donut-like or annular headrest for use on an automotive seat, there is usually found a method that requires using a bent headrest frame with headrest stays) and inserting it into and along the annular hollow inside of a preformed three-dimensional donut-like trim cover assembly.
Subsequent thereto, a liquid foaming base material is injected into the trim cover assembly and cured therein with the headrest frame in place. A resulting foamed donut-like headrest unit is obtained, with the headrest stays) projected therefrom.
This process, however, has encountered a technical difficulty in terms of how the headrest frame can be easily placed in the preformed donut-like trim cover assembly for the subsequent foaming process. Some solutions to this problem have been proposed, for example, those disclosed in the Japanese laid-open patent publication Nos. 62-257818 and 9-271425, and also in the Japanese granted Patent Pub. No. 4-401818. These documents commonly suggest that a generally inverted U-shaped headrest frame with headrest stays be inserted in the preformed donut-like trim cover assembly, and then, a connecting frame be connected between two side frame sections of such headrest frame, to thereby provide an annular frame portion extending in and along the donut-like trim
-2-cover assembly. After this procedure, a foaming is affected to create a foam padding integral with the frames and trim cover assembly, so that a donut-like headrest is obtained.
Such solution has been found defective in that the connecting frame cannot be quickly and precisely assembled with the headrest frame because a worker can hardly see the connecting point between the connecting and headrest frames which are both located in the trim cover assembly. He must manage to connect together these two frames within the trim cover assembly, feeling them with his hands.
To overcome this drawback, it has been suggested that the connecting frame be connected with the headrest frame, outside of the trim cover assembly.
See for example Japanese granted U.M. Pub. No. 7-31724. According to this prior art, a plate-like connecting frame is provided, which has a slit formed therein. During assembly, a generally U-shaped headrest frame is inserted into an opening of a donut-like trim cover assembly and placed in the trim cover assembly through that opening. Two headrest stay sections of the frame project outwardly therefrom. Thereafter, the plate-like connecting frame is connected between the two projecting headrest stay sections, while the ends of the foregoing opening of trim cover assembly are inserted into and through the slit of the connecting frame. In this way, the connecting frame can easily be accessed and connected to the headrest frame, externally of the trim cover assembly, in order to provide an annular frame work in conformity with the donut-like trim cover assembly and also close the opening of the same trim cover assembly.
However, in this prior art, the slit of the connecting frame is formed rather narrow with a view to preventing leakage of a liquid foaming base material from between the slit and the ends of the aforesaid opening. As a result, it is troublesome and time-consuming for a worker to squeeze and insert
Such solution has been found defective in that the connecting frame cannot be quickly and precisely assembled with the headrest frame because a worker can hardly see the connecting point between the connecting and headrest frames which are both located in the trim cover assembly. He must manage to connect together these two frames within the trim cover assembly, feeling them with his hands.
To overcome this drawback, it has been suggested that the connecting frame be connected with the headrest frame, outside of the trim cover assembly.
See for example Japanese granted U.M. Pub. No. 7-31724. According to this prior art, a plate-like connecting frame is provided, which has a slit formed therein. During assembly, a generally U-shaped headrest frame is inserted into an opening of a donut-like trim cover assembly and placed in the trim cover assembly through that opening. Two headrest stay sections of the frame project outwardly therefrom. Thereafter, the plate-like connecting frame is connected between the two projecting headrest stay sections, while the ends of the foregoing opening of trim cover assembly are inserted into and through the slit of the connecting frame. In this way, the connecting frame can easily be accessed and connected to the headrest frame, externally of the trim cover assembly, in order to provide an annular frame work in conformity with the donut-like trim cover assembly and also close the opening of the same trim cover assembly.
However, in this prior art, the slit of the connecting frame is formed rather narrow with a view to preventing leakage of a liquid foaming base material from between the slit and the ends of the aforesaid opening. As a result, it is troublesome and time-consuming for a worker to squeeze and insert
-3-the ends of the opening into such a narrow slit during assembly. Further, this sealing is rather rough, so that in the foaming process, a liquid foaming base material injected in the trim cover assembly will invade into non-tight spots between the connecting frame and ends of the opening, and result in creating objectionable uneven or irregular spots in the outer surface of the resulting headrest after the foaming process. This impairs the aesthetic appearance of the headrest.
The present invention provides an improved donut-like headrest for use on an automotive seat, which can be easily and quickly formed using a foaming process, while preventing leakage of a liquid foaming base material therefrom.
The headrest in accordance with the present invention includes a generally annular three-dimensional trim cover assembly having an annular inner hollow therein and an opening formed at one side thereof, wherein the opening is defined by an edge of the cover assembly. The trim cover assembly is made of at least a two layer lamination structure comprising a top cover layer and an elastic foam wadding layer. The headrest also includes a generally "U"
shaped headrest frame having a pair of stay portions for mounting on the automotive seat.
The generally "U" shaped headrest frame means is disposed in and along the annular inner hollow of the three-dimensional trim cover assembly, with the pair of stay portions thereof projecting from the opening of the trim cover assembly. A sealing and connecting frame connects the stay portions and closes and seals the opening. The sealing and connecting frame has a groove in which the edge of the cover assembly fits and is engaged. The sealing and connecting frame is provided between the stay portions.
A foam padding is formed within the three-dimensional trim cover assembly using a foaming process such that a liquid foaming base material is injected and cured in the trim cover assembly together with a part of the
The present invention provides an improved donut-like headrest for use on an automotive seat, which can be easily and quickly formed using a foaming process, while preventing leakage of a liquid foaming base material therefrom.
The headrest in accordance with the present invention includes a generally annular three-dimensional trim cover assembly having an annular inner hollow therein and an opening formed at one side thereof, wherein the opening is defined by an edge of the cover assembly. The trim cover assembly is made of at least a two layer lamination structure comprising a top cover layer and an elastic foam wadding layer. The headrest also includes a generally "U"
shaped headrest frame having a pair of stay portions for mounting on the automotive seat.
The generally "U" shaped headrest frame means is disposed in and along the annular inner hollow of the three-dimensional trim cover assembly, with the pair of stay portions thereof projecting from the opening of the trim cover assembly. A sealing and connecting frame connects the stay portions and closes and seals the opening. The sealing and connecting frame has a groove in which the edge of the cover assembly fits and is engaged. The sealing and connecting frame is provided between the stay portions.
A foam padding is formed within the three-dimensional trim cover assembly using a foaming process such that a liquid foaming base material is injected and cured in the trim cover assembly together with a part of the
-4-generally "U" shaped headrest frame. The liquid foaming base material is prevented by the sealing and connecting frame from leaking through the opening during the foaming process.
Accordingly, the edge of the opening of the trim cover assembly is engaged in the groove of the sealing and connecting frame means so as to provide a dual sealing effect. The opening edge is biased into contact with the bottom of the groove due to the elastic recoiling property of the foam wadding layer of the trim cover assembly. Further, the same opening edge is biased to contact with one wall of the groove by an increased mass of the foam cushion padding that has been formed by the foaming process. Thus, during the foaming process, such simple dual sealing structure of the sealing and connecting frame means completely prevents leakage of the liquid foaming base material through the opening. Moreover, a worker can easily connect the sealing and connecting frame to the stay portions of the headrest frame from the outside, while simply fitting the edge of the opening of the trim cover assembly in the groove of the sealing and connecting frame means.
Preferably, a pair of holes are formed in the sealing and connecting frame so that the foregoing pair of stay portions of the headrest frame pass through the two holes, thereby easily connecting the sealing and connecting frame with the headrest frame at a predetermined point, providing a robust frame structure. Preferably, an elastic tubular sealing member is provided on each of the two stay portions, so that the sealing and connecting frame is secured on the tubular sealing members and any minute clearance therebetween is sealed against any possible leakage of a liquid base foaming material therethrough during the foaming process.
Other features and advantages of the headrest will become apparent from a reading of the detailed description hereinafter, with reference to the annexed drawings.
Accordingly, the edge of the opening of the trim cover assembly is engaged in the groove of the sealing and connecting frame means so as to provide a dual sealing effect. The opening edge is biased into contact with the bottom of the groove due to the elastic recoiling property of the foam wadding layer of the trim cover assembly. Further, the same opening edge is biased to contact with one wall of the groove by an increased mass of the foam cushion padding that has been formed by the foaming process. Thus, during the foaming process, such simple dual sealing structure of the sealing and connecting frame means completely prevents leakage of the liquid foaming base material through the opening. Moreover, a worker can easily connect the sealing and connecting frame to the stay portions of the headrest frame from the outside, while simply fitting the edge of the opening of the trim cover assembly in the groove of the sealing and connecting frame means.
Preferably, a pair of holes are formed in the sealing and connecting frame so that the foregoing pair of stay portions of the headrest frame pass through the two holes, thereby easily connecting the sealing and connecting frame with the headrest frame at a predetermined point, providing a robust frame structure. Preferably, an elastic tubular sealing member is provided on each of the two stay portions, so that the sealing and connecting frame is secured on the tubular sealing members and any minute clearance therebetween is sealed against any possible leakage of a liquid base foaming material therethrough during the foaming process.
Other features and advantages of the headrest will become apparent from a reading of the detailed description hereinafter, with reference to the annexed drawings.
-5-In the drawings, Fig. 1 is an exploded schematic perspective view showing an incomplete headrest unit to be subjected to a foaming process in accordance with the present invention;
Fig. 2 is a front view of a sealing and connecting frame used in the present invention;
Fig. 3 is a sectional view taken along the line III-III in Fig. 2;
Fig. 4 is a diagram to show one process of assembling the incomplete headrest unit, in which the sealing and connecting frame is about to be connected with two stay portions of the headrest frame;
Fig. 5 is a perspective view of a resultant incomplete headrest unit;
Fig. 6 is a sectional view of another embodiment of the sealing and connecting frame;
Fig. 7 is a schematic sectional view showing an incomplete headrest unit placed in a foaming die device, and also showing how foaming is carried out;
Fig. 8 is a schematic longitudinally sectional view of a resultant foamed headrest wherein the first type of sealing and connecting frame is used; and Fig. 9 is a schematic longitudinally sectional view of a resultant foamed headrest wherein the other type of sealing and connecting frame is used.
Referring to Figs. 1 through 9, there are illustrated preferred embodiments of headrests constructed in accordance with the present invention.
This type of headrest has a generally donut-like or annular configuration and is for use on an automotive seat (not shown).
Fig. 1 shows an incomplete headrest unit, generally designated by (HU), which is the unit to be subjected to a foaming process described herein. As illustrated, the unit (HU) basically comprises a preformed donut-like or generally annular trim cover assembly 1 having an elongate opening 10, a
Fig. 2 is a front view of a sealing and connecting frame used in the present invention;
Fig. 3 is a sectional view taken along the line III-III in Fig. 2;
Fig. 4 is a diagram to show one process of assembling the incomplete headrest unit, in which the sealing and connecting frame is about to be connected with two stay portions of the headrest frame;
Fig. 5 is a perspective view of a resultant incomplete headrest unit;
Fig. 6 is a sectional view of another embodiment of the sealing and connecting frame;
Fig. 7 is a schematic sectional view showing an incomplete headrest unit placed in a foaming die device, and also showing how foaming is carried out;
Fig. 8 is a schematic longitudinally sectional view of a resultant foamed headrest wherein the first type of sealing and connecting frame is used; and Fig. 9 is a schematic longitudinally sectional view of a resultant foamed headrest wherein the other type of sealing and connecting frame is used.
Referring to Figs. 1 through 9, there are illustrated preferred embodiments of headrests constructed in accordance with the present invention.
This type of headrest has a generally donut-like or annular configuration and is for use on an automotive seat (not shown).
Fig. 1 shows an incomplete headrest unit, generally designated by (HU), which is the unit to be subjected to a foaming process described herein. As illustrated, the unit (HU) basically comprises a preformed donut-like or generally annular trim cover assembly 1 having an elongate opening 10, a
-6-generally inverted U-shaped headrest frame provided with a locating means (at 21A) and a plate-like sealing and connecting frame 3.
As can be seen from Fig. 1 in conjunction with Figs. 7, 8 and 9, the trim cover assembly 1 itself is preferably an at least two layer lamination structure comprising a top cover layer la and a wadding layer lb of slab urethane foam material so as to have a certain elastic yet rigid property, an important factor for the elongated opening 10 as shown below. The top cover layer 1 a can be formed from a woven or non-woven fabric material or a synthetic resin leather material. The trim cover assembly 1 can be preformed by sewing together several separate cover sections of such two-layer lamination structure into the illustrated three-dimensional donut or annular shape having a through-hole lA
formed centrally therein. In particular, the bottom wall 1B of this trim cover assembly 1 is formed with the foregoing elongate opening 10 and also with an injection hole 12. The injection hole 12 is adapted for allowing insertion of an injection nozzle (see 12 in Fig. 7) thereinto so that a liquid foaming base material may be injected via the nozzle into the trim cover assembly 1 in a subsequent foaming process. In the illustrated mode, the elongated opening 10 is formed to have a pair of longitudinal edges 10A, l OB and a pair of generally curved side edges l OR such as to provide a proper size of opening sufficient for the sealing and connecting frame 3 to be passed therethrough and smoothly placed in and along the annular inner hollow of trim cover assembly 1.
The sealing and connecting frame 3 has an elongate plate configuration, a pair of spaced-apart holes 30 formed therein, and a peripheral engagement groove 31 formed in and along the periphery thereof. As will be apparent, the pair of holes 30 are so adapted that two stay portions 21 of the headrest frame 2 can be passed therethrough, respectively. The two holes 30 are both slightly greater in diameter than the respective stay portions 21, since this allows smooth passing of the sealing and connecting frame 3 along the two stay _7_ portions 21 until the frame 3 is frictionally retained on two tubular sealing members 2A, as explained below. As best shown in Figs. 2 and 3, in the sealing and connecting frame 3, the peripheral engagement groove 31 is a generally rectangular recess which conforms generally in shape to the likewise rectangular contour of the edges 10A, l OB, l OR of elongate opening 10. The groove 31 therefore has a pair of longitudinal bottoms 31 B for receipt of respective longitudinal edges 10A, lOB of elongate openings 10, and a pair of generally curved side bottoms 31A, 31A for receipt of respective side edges l OR of the same opening 10. Outward and inward walls 32, 33 of the frame 3 are located on the opposite sides of these bottoms 31A, 31B, as can be seen from Fig. 3. It is important that the width of the groove 31 be equal to or slightly greater than the total thickness of the two-layer lamination la, lb of trim cover assembly 1, and that both longitudinal and side bottoms 31B, 31A of the groove 31 be slightly greater in size than the size of elongate opening 10, for sealing purposes related to the subsequent foaming process. Preferably, the sealing and connecting frame 3 is formed from a rigid and hard synthetic resin material, such as polypropylene.
The headrest frame 2, in accordance with the present invention, is formed by bending a metallic tube or rod into a generally "U" shaped configuration, the rod having a generally semi-circular head support portion and a pair of stay portions 21 to be mounted on a seat back of an automotive seat (not shown). Each of the two stay portions 21 is provided with a pair of location projections 21A as a means for limiting and locating the sealing and connecting frame 3 at a given position relative to the elongate opening 10 of the trim cover assembly 1. Thus, a worker can easily locate the frame 3 at the stay portions 21 of headrest frame 2 and also determine an appropriate proportion of the sem-circular head support portion 20 to be located within the annular inner hollow of the donut-like trim cover assembly 1. At the same time, the worker _g_ can directly engage the edges 10A, l OB, l OR of opening 10 in and along the engagement groove 31 of frame 3, without taking into account the proportion of the stay portions 21 to the semi-circular head support portion 20 in relation to the trim cover assembly 1. For that purpose, both pairs of location projections 21A, each pair extending integrally from opposite sides of one of the stay portions 21, are disposed at a predetermined point on the stay portions 21 near to the juncture between the generally semi-circular head support portion 20 and stay sections 21.
The pair of tubular sealing members 2A are secured about the pair of stay sections 21 of headrest frame 2 and are adapted for tight engagement in the respective two holes 30 of the sealing and connecting frame 3. The purpose of the sealing members 2A is not only to retain the sealing and connecting frame at a predetermined position set by the location projections 21A upon the two stay sections 21 but also to seal a minute clearance between the stay section and the hole 30 and thus prevent possible leakage of a liquid base foaming material therethrough. These tubular sealing members 2A can preferably be formed from a rubber tubular material or other suitable elastic material such as an elastic synthetic resin material, so that each will strongly stick to and on the stay portion 21. As shown in Fig. 1, each of the sealing members 2A is secured on the stay portion 21 at a point adjoining the location projections 21A, so that the sealing and connecting frame 3 can be secured by these sealing members at a predetermined point where the edge of elongate hole 10 of trim cover assembly 1 can easily and quickly be engaged in and along the groove 31 of frame 3.
The process for forming a donut-like headrest, using the above-described basic constituent elements, will now be described.
In a first step, the headrest frame 2 is inserted via the elongated opening 10 into the donut-like trim cover assembly 1 by first inserting one of the two stay portions 21 in and along the annular inner hollow of trim cover assembly 1. The headrest frame 2 is moved around and within the trim cover assembly 1.
Then, the whole of the headrest frame 2 is adjustingly placed in position within the trim cover assembly 2, with both stay portions 21 projecting outwardly from the elongate opening 10, as can be seen in Fig. 4. At this point, a worker can easily find where to locate the headrest frame 2 and its two stay portions relative to the opening 10, because he or she can see both location projections 21A and tubular sealing members 2A at the opening 10. Then, by letting the two stay portions 21 pass through the respective two holes 30, the worker can slide the sealing and connecting frame 3 on and along the two stay portions 21 until both holes 30 ride on and about the two sealing tubular members 2A, respectively. The worker continues to forcibly slide the sealing and connecting frame 3 along until the tubular sealing members 2A are completely located in and secured in the holes 30 and the inward wall 33 of the frame 3 contacts the location projections 21A. In this way, the sealing and connecting frame 3 is now set in position between the two stay portions 21 of headrest frame 2.
Then, a worker widens the elongate opening 10 with respect to the sealing and connecting frame 3 and engages its edges 10A, IOB, lOR in and along the peripheral engagement groove 31 of the frame 3, whereupon an incomplete headrest unit (HU) is assembled as shown in Fig. 5.
Next, as illustrated in Fig. 7, this incomplete headrest unit (HU) is placed between upper and lower dies (UD) (LD) of an ordinary known type of foaming die device, which has die surfaces generally contoured along the outer shape of the above-assembled incomplete headrest unit (HU). Thereafter, an injection nozzle (N) is inserted into the inside trim cover assembly 1 via the injection hole 12 , and a liquid foaming base material 4L is injected from the nozzle N thereinto, so that an appropriate amount of the base material 4L is contained in the trim cover assembly 1. The liquid foaming base material 4L is then cured to subject the whole incomplete headrest unit (HU) to foaming, whereby a foam padding 4 is formed within the trim cover assembly. This padding is integral with the headrest frame 2 and sealing and connecting frame 3, as shown in Figs. 8 and 9. Thus, a donut-like headrest (HR) is produced.
During the foaming process, the whole of edges 10A, lOB and l OR of elongate opening 10, due to its elastic repercussive property originating from the foam wadding layer lb of the trim cover assembly 1, are driven tight against and along the groove bottoms 31A, 31B of the sealing and connecting frame 3. In addition, the increasing elastic mass of foamed base material 4L presses against the peripheral area around opening 10 causing this area to contact closely the outward wall 32. In this way, a dual sealing effect is provided between the frame 3 and opening 10 to completely prevent leakage of the liquid foaming base material 4L.
Fig. 6 shows an alternative type of sealing and connecting frame 3, the use of which is within the scope of the present invention. An inward wall 33 is formed which is small relative to the outward wall 32 by simply cutting off the peripheral end region of the corresponding inward wall of the above-described first type of frame 3. This arrangement facilitates the ease with which a worker can engage the opening edges 10A, l OB, l OR of trim cover assembly 1 in and along the engagement groove 31 of the sealing and connecting frame 3. He or she does not need to widen the opening 10 as much as with the first type having the same size of outward and inward walls 33, 32. Subsequent to placement of this second type of frame, the same foaming process is affected, using the same foaming die device shown in Fig. 7. Fig. 9 shows a resultant donut-like headrest (HR) in which such second type of sealing and connecting frame 3 is used. In this case, the same dual sealing effect is realized between the frame 3 and opening 10, thereby preventing leakage of the liquid foaming base material 4L.
Accordingly, in accordance with the present invention, both frames 2 and 3 can be quickly assembled together at a given connecting point (at 21A), without any care about proportion between the generally circular head support portion 20 and the two stay portions 21 in relation to the trim cover assembly 1, and the sealing and connecting frame 3 can be easily mounted in the opening 10 to close the latter in an optimum sealing fashion effective at the subsequent foaming process. Further, the sealing and connecting frame 3 is connected with the headrest 2 via the two holes 30, which advantageously allows a worker to assure positive connection between the two frames 3, 2 with much ease and rapidity. This arrangement also provides a reinforcement for the headrest frame 2. Moreover, in contrast to the hitherto headrest framework of this sort, the connecting frame 3 her se has the outward wall 32 exposed externally of the trim cover assembly 1, and therefore, this wall 32 serves to finally stop leakage of liquid foaming base material 4L and to cover the peripheral region of the opening 10 in which such leakage might occur. Hence the wall 32 conceals any uneven spots of leaked cured foaming material that have been created after the foaming process.
It should be understood that the invention is not limited to the illustrated and described embodiments but other modifications, replacements and additions may be used without departing from the scope of this invention and appended claims.
As can be seen from Fig. 1 in conjunction with Figs. 7, 8 and 9, the trim cover assembly 1 itself is preferably an at least two layer lamination structure comprising a top cover layer la and a wadding layer lb of slab urethane foam material so as to have a certain elastic yet rigid property, an important factor for the elongated opening 10 as shown below. The top cover layer 1 a can be formed from a woven or non-woven fabric material or a synthetic resin leather material. The trim cover assembly 1 can be preformed by sewing together several separate cover sections of such two-layer lamination structure into the illustrated three-dimensional donut or annular shape having a through-hole lA
formed centrally therein. In particular, the bottom wall 1B of this trim cover assembly 1 is formed with the foregoing elongate opening 10 and also with an injection hole 12. The injection hole 12 is adapted for allowing insertion of an injection nozzle (see 12 in Fig. 7) thereinto so that a liquid foaming base material may be injected via the nozzle into the trim cover assembly 1 in a subsequent foaming process. In the illustrated mode, the elongated opening 10 is formed to have a pair of longitudinal edges 10A, l OB and a pair of generally curved side edges l OR such as to provide a proper size of opening sufficient for the sealing and connecting frame 3 to be passed therethrough and smoothly placed in and along the annular inner hollow of trim cover assembly 1.
The sealing and connecting frame 3 has an elongate plate configuration, a pair of spaced-apart holes 30 formed therein, and a peripheral engagement groove 31 formed in and along the periphery thereof. As will be apparent, the pair of holes 30 are so adapted that two stay portions 21 of the headrest frame 2 can be passed therethrough, respectively. The two holes 30 are both slightly greater in diameter than the respective stay portions 21, since this allows smooth passing of the sealing and connecting frame 3 along the two stay _7_ portions 21 until the frame 3 is frictionally retained on two tubular sealing members 2A, as explained below. As best shown in Figs. 2 and 3, in the sealing and connecting frame 3, the peripheral engagement groove 31 is a generally rectangular recess which conforms generally in shape to the likewise rectangular contour of the edges 10A, l OB, l OR of elongate opening 10. The groove 31 therefore has a pair of longitudinal bottoms 31 B for receipt of respective longitudinal edges 10A, lOB of elongate openings 10, and a pair of generally curved side bottoms 31A, 31A for receipt of respective side edges l OR of the same opening 10. Outward and inward walls 32, 33 of the frame 3 are located on the opposite sides of these bottoms 31A, 31B, as can be seen from Fig. 3. It is important that the width of the groove 31 be equal to or slightly greater than the total thickness of the two-layer lamination la, lb of trim cover assembly 1, and that both longitudinal and side bottoms 31B, 31A of the groove 31 be slightly greater in size than the size of elongate opening 10, for sealing purposes related to the subsequent foaming process. Preferably, the sealing and connecting frame 3 is formed from a rigid and hard synthetic resin material, such as polypropylene.
The headrest frame 2, in accordance with the present invention, is formed by bending a metallic tube or rod into a generally "U" shaped configuration, the rod having a generally semi-circular head support portion and a pair of stay portions 21 to be mounted on a seat back of an automotive seat (not shown). Each of the two stay portions 21 is provided with a pair of location projections 21A as a means for limiting and locating the sealing and connecting frame 3 at a given position relative to the elongate opening 10 of the trim cover assembly 1. Thus, a worker can easily locate the frame 3 at the stay portions 21 of headrest frame 2 and also determine an appropriate proportion of the sem-circular head support portion 20 to be located within the annular inner hollow of the donut-like trim cover assembly 1. At the same time, the worker _g_ can directly engage the edges 10A, l OB, l OR of opening 10 in and along the engagement groove 31 of frame 3, without taking into account the proportion of the stay portions 21 to the semi-circular head support portion 20 in relation to the trim cover assembly 1. For that purpose, both pairs of location projections 21A, each pair extending integrally from opposite sides of one of the stay portions 21, are disposed at a predetermined point on the stay portions 21 near to the juncture between the generally semi-circular head support portion 20 and stay sections 21.
The pair of tubular sealing members 2A are secured about the pair of stay sections 21 of headrest frame 2 and are adapted for tight engagement in the respective two holes 30 of the sealing and connecting frame 3. The purpose of the sealing members 2A is not only to retain the sealing and connecting frame at a predetermined position set by the location projections 21A upon the two stay sections 21 but also to seal a minute clearance between the stay section and the hole 30 and thus prevent possible leakage of a liquid base foaming material therethrough. These tubular sealing members 2A can preferably be formed from a rubber tubular material or other suitable elastic material such as an elastic synthetic resin material, so that each will strongly stick to and on the stay portion 21. As shown in Fig. 1, each of the sealing members 2A is secured on the stay portion 21 at a point adjoining the location projections 21A, so that the sealing and connecting frame 3 can be secured by these sealing members at a predetermined point where the edge of elongate hole 10 of trim cover assembly 1 can easily and quickly be engaged in and along the groove 31 of frame 3.
The process for forming a donut-like headrest, using the above-described basic constituent elements, will now be described.
In a first step, the headrest frame 2 is inserted via the elongated opening 10 into the donut-like trim cover assembly 1 by first inserting one of the two stay portions 21 in and along the annular inner hollow of trim cover assembly 1. The headrest frame 2 is moved around and within the trim cover assembly 1.
Then, the whole of the headrest frame 2 is adjustingly placed in position within the trim cover assembly 2, with both stay portions 21 projecting outwardly from the elongate opening 10, as can be seen in Fig. 4. At this point, a worker can easily find where to locate the headrest frame 2 and its two stay portions relative to the opening 10, because he or she can see both location projections 21A and tubular sealing members 2A at the opening 10. Then, by letting the two stay portions 21 pass through the respective two holes 30, the worker can slide the sealing and connecting frame 3 on and along the two stay portions 21 until both holes 30 ride on and about the two sealing tubular members 2A, respectively. The worker continues to forcibly slide the sealing and connecting frame 3 along until the tubular sealing members 2A are completely located in and secured in the holes 30 and the inward wall 33 of the frame 3 contacts the location projections 21A. In this way, the sealing and connecting frame 3 is now set in position between the two stay portions 21 of headrest frame 2.
Then, a worker widens the elongate opening 10 with respect to the sealing and connecting frame 3 and engages its edges 10A, IOB, lOR in and along the peripheral engagement groove 31 of the frame 3, whereupon an incomplete headrest unit (HU) is assembled as shown in Fig. 5.
Next, as illustrated in Fig. 7, this incomplete headrest unit (HU) is placed between upper and lower dies (UD) (LD) of an ordinary known type of foaming die device, which has die surfaces generally contoured along the outer shape of the above-assembled incomplete headrest unit (HU). Thereafter, an injection nozzle (N) is inserted into the inside trim cover assembly 1 via the injection hole 12 , and a liquid foaming base material 4L is injected from the nozzle N thereinto, so that an appropriate amount of the base material 4L is contained in the trim cover assembly 1. The liquid foaming base material 4L is then cured to subject the whole incomplete headrest unit (HU) to foaming, whereby a foam padding 4 is formed within the trim cover assembly. This padding is integral with the headrest frame 2 and sealing and connecting frame 3, as shown in Figs. 8 and 9. Thus, a donut-like headrest (HR) is produced.
During the foaming process, the whole of edges 10A, lOB and l OR of elongate opening 10, due to its elastic repercussive property originating from the foam wadding layer lb of the trim cover assembly 1, are driven tight against and along the groove bottoms 31A, 31B of the sealing and connecting frame 3. In addition, the increasing elastic mass of foamed base material 4L presses against the peripheral area around opening 10 causing this area to contact closely the outward wall 32. In this way, a dual sealing effect is provided between the frame 3 and opening 10 to completely prevent leakage of the liquid foaming base material 4L.
Fig. 6 shows an alternative type of sealing and connecting frame 3, the use of which is within the scope of the present invention. An inward wall 33 is formed which is small relative to the outward wall 32 by simply cutting off the peripheral end region of the corresponding inward wall of the above-described first type of frame 3. This arrangement facilitates the ease with which a worker can engage the opening edges 10A, l OB, l OR of trim cover assembly 1 in and along the engagement groove 31 of the sealing and connecting frame 3. He or she does not need to widen the opening 10 as much as with the first type having the same size of outward and inward walls 33, 32. Subsequent to placement of this second type of frame, the same foaming process is affected, using the same foaming die device shown in Fig. 7. Fig. 9 shows a resultant donut-like headrest (HR) in which such second type of sealing and connecting frame 3 is used. In this case, the same dual sealing effect is realized between the frame 3 and opening 10, thereby preventing leakage of the liquid foaming base material 4L.
Accordingly, in accordance with the present invention, both frames 2 and 3 can be quickly assembled together at a given connecting point (at 21A), without any care about proportion between the generally circular head support portion 20 and the two stay portions 21 in relation to the trim cover assembly 1, and the sealing and connecting frame 3 can be easily mounted in the opening 10 to close the latter in an optimum sealing fashion effective at the subsequent foaming process. Further, the sealing and connecting frame 3 is connected with the headrest 2 via the two holes 30, which advantageously allows a worker to assure positive connection between the two frames 3, 2 with much ease and rapidity. This arrangement also provides a reinforcement for the headrest frame 2. Moreover, in contrast to the hitherto headrest framework of this sort, the connecting frame 3 her se has the outward wall 32 exposed externally of the trim cover assembly 1, and therefore, this wall 32 serves to finally stop leakage of liquid foaming base material 4L and to cover the peripheral region of the opening 10 in which such leakage might occur. Hence the wall 32 conceals any uneven spots of leaked cured foaming material that have been created after the foaming process.
It should be understood that the invention is not limited to the illustrated and described embodiments but other modifications, replacements and additions may be used without departing from the scope of this invention and appended claims.
Claims (13)
1. A headrest of a generally annular type for use on an automotive seat, comprising:
a generally annular, three-dimensional trim cover assembly having an annular inner hollow therein and an opening formed at one side thereof, wherein said opening is defined by an edge of the cover assembly, said trim cover assembly being made of at least a two layer lamination structure comprising a top cover layer and an elastic foam wadding layer;
a generally "U" shaped headrest frame means having a pair of stay portions for mounting on said automotive seat;
said generally "U" shaped headrest frame means being disposed in and along the annular inner hollow of said trim cover assembly, with the pair of stay portions thereof projecting from said opening of the trim cover assembly;
a sealing and connecting frame means for connecting said pair of stay portions and closing and sealing said opening, said sealing and connecting frame means having a groove in which said edge of said cover assembly fits and is engaged, said sealing and connecting frame means being provided between said pair of stay portions; and a foam padding which has been formed within said trim cover assembly using a foaming process such that a liquid foaming base material is injected and cured in the trim cover assembly together with a part of said generally "U"
shaped headrest frame, wherein the liquid foaming base material is prevented by said sealing and connecting frame means from leaking through said opening during the foaming process.
a generally annular, three-dimensional trim cover assembly having an annular inner hollow therein and an opening formed at one side thereof, wherein said opening is defined by an edge of the cover assembly, said trim cover assembly being made of at least a two layer lamination structure comprising a top cover layer and an elastic foam wadding layer;
a generally "U" shaped headrest frame means having a pair of stay portions for mounting on said automotive seat;
said generally "U" shaped headrest frame means being disposed in and along the annular inner hollow of said trim cover assembly, with the pair of stay portions thereof projecting from said opening of the trim cover assembly;
a sealing and connecting frame means for connecting said pair of stay portions and closing and sealing said opening, said sealing and connecting frame means having a groove in which said edge of said cover assembly fits and is engaged, said sealing and connecting frame means being provided between said pair of stay portions; and a foam padding which has been formed within said trim cover assembly using a foaming process such that a liquid foaming base material is injected and cured in the trim cover assembly together with a part of said generally "U"
shaped headrest frame, wherein the liquid foaming base material is prevented by said sealing and connecting frame means from leaking through said opening during the foaming process.
2. The headrest as defined in claim 1 wherein said sealing and connecting frame means comprises a plate-like sealing and connecting frame, said groove is formed in and along a peripheral edge of said plate-like sealing and connecting frame, and said edge of said trim cover assembly is biased for engagement in the groove by an elastic recoiling property of said foam wadding layer of the trim cover assembly.
3. The headrest according to claim 2 wherein said plate-like sealing and connecting frame is formed from a hard synthetic resin material.
4. The headrest according to claim 2 or 3 wherein said groove has a bottom with dimensions slightly greater in size than said opening so that said edge around the opening is biased into close contact with said bottom of the groove due to said elastic recoiling property of the foam wadding layer.
5. The headrest according to any one of claims 1 to 4 wherein said groove has a width equal to or slightly greater than a thickness of the lamination structure of said trim cover assembly.
6. The headrest according to any one of claims 1 to 5 wherein said sealing and connecting frame has outward and inward walls that define said groove and said outward and inward walls respectively face outwardly and inwardly relative to said trim cover assembly.
7. The headrest according to claim 6 wherein said inward wall is smaller than said outward wall.
8. The headrest according to any one of claims 1 to 7 including locating means for limiting the movement of and locating said sealing and connecting frame means at a predetermined point on said pair of stay portions and for positioning said sealing and connecting frame means in said opening of the trim cover assembly.
9. The headrest according to claim 8 wherein said locating means comprises at least one locating projection formed integrally on each of said pair of stay portions.
10. The headrest as defined in any one of claims 1 to 9 wherein said generally "U" shaped headrest frame means is formed by bending a metallic tubular or rod material in a generally "U" shape so as to form a generally semi-circular head support portion and said pair of stay portions, and wherein said generally semi-circular head support portion is disposed within the annular inner hollow of said trim cover assembly and said pair of stay portions project through said opening and through the sealing and connecting frame means to the outside of the headrest.
11. The headrest as defined in any one of claims 1 to 10 wherein said sealing and connecting frame means has a pair of holes formed therein and said sealing and connecting frame means is connected between said pair of stay portions so that said pair of stay portions pass through said pair of holes, respectively.
12. The headrest according to claim 11 wherein an elastic tubular sealing member is provided on each of said pair of stay portions so as to seal a clearance between said pair of holes of said sealing and connecting frame means and said pair of stay portions.
13. The headrest as defined in any one of claims 1 to 10 including locating means for limiting the movement of and locating said sealing and connecting frame means at a predetermined point on said pair of stay portions, said sealing and connecting frame means being located in said opening of the three-dimensional trim cover assembly, and an elastic tubular sealing member provided on each of said pair of stay portions adjacent to said predetermined point so as to seal a clearance between said pair of holes of said sealing and connecting frame means and said pair of stay portions.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002238853A CA2238853C (en) | 1998-05-28 | 1998-05-28 | Headrest for automotive seat |
| GB9811494A GB2337694B (en) | 1998-05-28 | 1998-05-29 | Headrest |
| DE19827658A DE19827658B4 (en) | 1998-05-28 | 1998-06-22 | Method of manufacturing a headrest for a motor vehicle seat |
| FR9808009A FR2780355B1 (en) | 1998-05-28 | 1998-06-24 | SUBSTANTIALLY ANNULAR TYPE HEADREST, PARTICULARLY FOR A MOTOR VEHICLE SEAT |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002238853A CA2238853C (en) | 1998-05-28 | 1998-05-28 | Headrest for automotive seat |
| GB9811494A GB2337694B (en) | 1998-05-28 | 1998-05-29 | Headrest |
| DE19827658A DE19827658B4 (en) | 1998-05-28 | 1998-06-22 | Method of manufacturing a headrest for a motor vehicle seat |
| FR9808009A FR2780355B1 (en) | 1998-05-28 | 1998-06-24 | SUBSTANTIALLY ANNULAR TYPE HEADREST, PARTICULARLY FOR A MOTOR VEHICLE SEAT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2238853A1 CA2238853A1 (en) | 1999-11-28 |
| CA2238853C true CA2238853C (en) | 2002-01-22 |
Family
ID=32996055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002238853A Expired - Fee Related CA2238853C (en) | 1998-05-28 | 1998-05-28 | Headrest for automotive seat |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2238853C (en) |
| DE (1) | DE19827658B4 (en) |
| FR (1) | FR2780355B1 (en) |
| GB (1) | GB2337694B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2238853C (en) * | 1998-05-28 | 2002-01-22 | Tachi-S Co., Ltd. | Headrest for automotive seat |
| JP4090820B2 (en) | 2002-08-29 | 2008-05-28 | 本田技研工業株式会社 | Child seat mounting structure |
| FR2903636B1 (en) * | 2006-07-13 | 2009-05-15 | Cera | AUTOMOTIVE VEHICLE HEAD SUPPORT COMPRISING A CUTTING IN A FORMAT AND A RECOVERY FRAME |
| ITTO20070936A1 (en) * | 2007-12-21 | 2009-06-22 | Cd Design S R L | COMPOSITE HELMET AND PROCEDURE FOR ITS MANUFACTURING |
| JP5875361B2 (en) * | 2011-12-26 | 2016-03-02 | 難波プレス工業株式会社 | Vehicle seat headrest and method of manufacturing the same |
| JP6319802B2 (en) | 2014-08-26 | 2018-05-09 | 株式会社タチエス | Skin fixing structure and vehicle seat |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS441818B1 (en) | 1965-04-22 | 1969-01-27 | ||
| FR2428538A3 (en) * | 1978-05-02 | 1980-01-11 | Bruzolo Snc Manifatt | Head rest fitted to car seat - has cushion with interior frame having two mounts projecting at base into seat back |
| DE2836579A1 (en) * | 1978-08-21 | 1980-05-14 | Happich Gmbh Gebr | Lightweight frame for headrest - includes two profiled strips bent into buried frame complete with couplings |
| JPS60126119A (en) * | 1983-12-13 | 1985-07-05 | 東京シ−ト株式会社 | Production of seethrough headrest |
| DE3520803A1 (en) * | 1985-06-11 | 1986-12-11 | Helmut 5804 Herdecke Pelzer | Headrest for motor vehicle seats having one or more holding and supporting elements which can be connected to the backrest of the vehicle seat and are accommodated in the interior of a moulded body which is formed from a foam plastic and provided with a surface structure |
| JPS6235811A (en) * | 1985-08-09 | 1987-02-16 | Tokai Kasei Kogyo Kk | Manufacture of integral expansion molded part |
| JPS62257818A (en) | 1986-05-02 | 1987-11-10 | Tokai Chem Ind Ltd | Manufacture of foam molded product provided with skin |
| JPS63290711A (en) * | 1987-05-23 | 1988-11-28 | Tokai Chem Ind Ltd | Manufacture of integral foam molded product with ring structure |
| JPH0414046Y2 (en) * | 1987-09-30 | 1992-03-31 | ||
| JPH01153183A (en) * | 1987-12-11 | 1989-06-15 | Shigeru Co Ltd | Production of cushion body |
| DE3818018C1 (en) * | 1988-05-27 | 1989-08-31 | Eugen Otto 4010 Hilden De Butz | Head restraint for motor-vehicle seats |
| JP2651712B2 (en) * | 1988-10-24 | 1997-09-10 | 難波プレス工業株式会社 | Manufacturing method of perforated headrest |
| JPH04164404A (en) * | 1990-10-29 | 1992-06-10 | Ikeda Bussan Co Ltd | Movable head rest |
| JPH0731724A (en) | 1993-07-19 | 1995-02-03 | San Denshi Kk | Random number generator |
| JP3592378B2 (en) * | 1994-08-28 | 2004-11-24 | 株式会社イノアックコーポレーション | Headrest and manufacturing method thereof |
| JPH08252147A (en) * | 1994-12-30 | 1996-10-01 | Tokyo Seat Kk | Method for manufacturing headrest foamed integratedly with surface material |
| JP3021326B2 (en) * | 1995-07-07 | 2000-03-15 | 株式会社イノアックコーポレーション | Foam molded product with skin and method for producing the same |
| JP2996286B2 (en) * | 1995-10-09 | 1999-12-27 | 池田物産株式会社 | Headrest foam molding method and foam mold |
| JPH09271425A (en) | 1996-02-08 | 1997-10-21 | Inoac Corp | Stay for head rest and head rest |
| US5681088A (en) * | 1996-08-22 | 1997-10-28 | Tachi-S Co., Ltd. | Position adjustable headrest |
| JPH10295485A (en) * | 1997-04-30 | 1998-11-10 | Tachi S Co Ltd | Headrest with hole |
| US5984414A (en) * | 1997-12-31 | 1999-11-16 | Tachi-S Co., Ltd. | Headrest |
| CA2238853C (en) * | 1998-05-28 | 2002-01-22 | Tachi-S Co., Ltd. | Headrest for automotive seat |
-
1998
- 1998-05-28 CA CA002238853A patent/CA2238853C/en not_active Expired - Fee Related
- 1998-05-29 GB GB9811494A patent/GB2337694B/en not_active Expired - Fee Related
- 1998-06-22 DE DE19827658A patent/DE19827658B4/en not_active Expired - Fee Related
- 1998-06-24 FR FR9808009A patent/FR2780355B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2780355B1 (en) | 2001-07-13 |
| DE19827658B4 (en) | 2004-12-23 |
| CA2238853A1 (en) | 1999-11-28 |
| GB9811494D0 (en) | 1998-07-29 |
| FR2780355A1 (en) | 1999-12-31 |
| DE19827658A1 (en) | 1999-12-23 |
| GB2337694B (en) | 2001-11-28 |
| GB2337694A (en) | 1999-12-01 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |