1. A retractable headrest incorporated into a seatback pivotally associated with a seat bottom, said headrest comprising:
a plate shaped support contained within the seatback;
a scissor linkage exhibiting a plurality of interconnecting and overlapping link arms and pivotally secured at one end to said support;
a spring biased rivet at an overlapping location of said link arms for travel along a linear extending channel defined in said support;
a carriage connecting to the other end of said scissor linkage and which is linearly displaceable along said support;
a headrest support rod connected to said carriage and extending from the seatback;
a pawl pivotally supported proximate said one end of said scissor linkage, said pawl including a catch location which is biased in a first direction to engage a first pin extending from said support;
a first cable connected to said pawl and a second cable connected to said carriage; and
during rotation of the seatback from an upright design position to a forward dump position, actuation of said first cable pivoting said pawl against its bias to unseat said catch location from said pin, concurrent actuation of said second cable exerting a pulling force to compress said scissor linkage to a retracted position.
2. The invention as described in claim 1, further comprising a shingled headrest bun secured over said support rod.
3. The invention as described in claim 1, said plurality of interconnecting and overlapping link arms further comprising first, second and third pairs of individually overlapping and end-to-end pivotally connected link arms.
4. The invention as described in claim 1, further comprising a stop pin extending from a location of a selected link arm and engaging a shoulder location of said pawl at a maximum pivoted location.
5. The invention as described in claim 1, further comprising a main clock spring supported about said spring biased rivet, an outer curled projecting end of said spring engaging a further pin extending from a selected one of said overlapping link arms.
6. The invention as described in claim 5, further comprising a secondary clock spring having a first end engaged with a base link arm and an opposite end engaging said pawl into contact with said first pin.
7. The invention as described in claim 1, further comprising a seatback release lever situated on a surface of the seat back and to which remote locations of each of said first and second cables extend.
8. The invention as described in claim 7, each of said cables further comprising an outer fixed sheath through which extends an inner displaceable wire between said lever and said respective pawl and carriage.
9. The invention as described in claim 8, further comprising brackets secured to said support and in turn supporting extending ends of said outer sheath associated with each of said first and second cables.
10. A retractable headrest, comprising:
a plate shaped support embedded within a seatback;
a scissor linkage exhibiting a plurality of interconnecting link arms pivotally secured at one end to said support and at the other end to a carriage linearly displaceable along said support, said linkage exerting an extending bias against said carriage;
a rivet disposed at an overlapping intermediate location of a selected pair of said link arms for travel along a linear extending channel defined in said support;
a headrest support rod connected to said carriage and extending from the seatback; and
a pawl pivotally supported proximate a base end of the scissor linkage, said pawl including a catch location which is biased in a first direction to engage a first pin extending from a location of said plate shaped support proximate a base link arm selected from said plurality of interconnecting link arms;
a first cable connected to said pawl and a second cable connected to said carriage; and
during rotation of the seatback from an upright design position to a forward dump position, actuation of said first cable pivoting said pawl against its bias to unseat said catch location from said pin, concurrent actuation of said second cable exerting a pulling force to compress said scissor linkage to a retracted position.
11. The invention as described in claim 10, further comprising a shingled headrest bun secured over said support rod.
12. The invention as described in claim 10, said plurality of interconnecting link arms further comprising first, second and third pairs of individually overlapping and end-to-end pivotally connected link arms.
13. The invention as described in claim 10, further comprising a stop pin extending from a location of said base link arm and engaging a shoulder location of said pawl at a maximum pivoted location.
14. The invention as described in claim 10, further comprising a main clock spring supported about said rivet, an outer curled projecting end of said spring engaging a further pin extending from a selected one of said overlapping link arms and in order to exert an extensible biasing force to said scissor linkage.
15. The invention as described in claim 10, further comprising a secondary clock spring having a first end engaged with said selected link arm and an opposite end engaging said pawl into contact with said first pin.
16. The invention as described in claim 10, further comprising a seatback release lever situated on a surface of the seat back and to which remote locations of each of said first and second cables extend.
17. The invention as described in claim 16, each of said cables further comprising an outer fixed sheath through which extends an inner displaceable wire between said lever and said respective pawl and carriage.
18. The invention as described in claim 17, further comprising brackets secured to said support and in turn supporting extending ends of said outer sheath associated with each of said first and second cables.
19. A retractable headrest incorporated into a pivotal seatback, said headrest comprising:
a plate shaped support embedded within a seatback;
a scissor linkage exhibiting a plurality of interconnecting link arms pivotally secured at one end to said support and at the other end to a carriage linearly displaceable along said support;
a linearly displaceable rivet disposed at an overlapping intermediate location of a selected pair of said link arms for travel along a linear extending channel defined in said support;
a clock spring secured about said linearly displaceable pin and exhibiting a curled end engaging a selected of said overlapping link arms such that said linkage is biased in an extensible direction;
a headrest support rod connected to said carriage and extending from the seatback for receiving a headrest bun;
a pawl pivotally supported proximate a base end of the scissor linkage, said pawl including a catch location which is biased in a first direction to engage a first pin extending from a location of said plate shaped support proximate a base link arm selected from said plurality of interconnecting link arms;
a first cable extending from a first remote location and connected to said pawl, a second cable extending from a second remote location and connected to said carriage; and
during rotation of the seatback from an upright design position to a forward dump position, actuation of said first cable pivoting said pawl against its bias to unseat said catch location from said pin, concurrent actuation of said second cable exerting a pulling force to compress said scissor linkage to a retracted position.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electronic circuit comprising:
a first substrate on which first and second antennas are formed at a predetermined interval; and
a second substrate which has the same external shape as that of the first substrate, and on which a third antenna is formed at a position of the first antenna formed on the first substrate and a fourth antenna is formed at position of the second antenna formed on the first substrate, and which is stacked and mounted on the first substrate so as to carry out wireless communications between the first antenna and the fourth antenna and have a portion not overlapping the first substrate.
2. The electronic circuit according to claim 1, wherein the first substrate and the second substrate are stacked and mounted in directions 90 degrees or 180 degrees different from each other.
3. An electronic circuit according to claim 1, further comprising:
a first substrate on which first and second antennas are formed at a predetermined interval;
a second substrate which has the same external shape as that of the first substrate, and on which third and fourth antennas are formed at positions of the first and second antennas formed on the first substrate, and which is stacked and mounted on the first substrate so as to carry out wireless communications between the first antenna and the fourth antenna and have a portion not overlapping the first substrate; and
a means for giving information on the layer positions of the first and second substrates to the substrates from the outside.
4. An electronic circuit comprising:
a first substrate on which first and second antennas are formed at a predetermined interval;
a second substrate which has the same external shape as that of the first substrate, and on which third and fourth antennas are formed at positions of the first and second antennas formed on the first substrate, and which is stacked and mounted on the first substrate so as to carry out wireless communications between the first antenna and the fourth antenna and have a portion not overlapping the first substrate; and
a control substrate which includes a control antenna for communicating with the first and fourth antennas, and controls data communications between the first substrate and the second substrate or data communications between the first and second substrates and the outside.
5. The electronic circuit according to claim 4, wherein the control substrate has the same external shape as that of the first and second substrates.
6. The electronic circuit according to claim 4, wherein the control substrate controls data communications with the outside by randomly accessing the first and second substrates.
7. The electronic circuit according to claim 4, wherein the control substrate controls random access data communications between the first and the second substrates.
8. The electronic circuit according to claim 1, further comprising:
a third substrate which has the same external shape as that of the first and second substrates, on which fifth and sixth antennas are formed at the positions of the first and second antennas formed on the first substrate, and which carries out wireless communications between the third antenna and the sixth antenna, and is stacked and mounted on the second substrate so as to have the second substrate to be sandwiched by the first substrate and the third substrate and have a portion not overlapping the second substrate, wherein
the electronic circuit carries out successive data transfer from the first substrate to the second substrate according to control by the first substrate and from the second substrate to the third substrate according to control by the second substrate.
9. The electronic circuit according to claim 4, further comprising:
a third substrate which has the same external shape as that of the first and second substrates, on which fifth and sixth antennas are formed at the positions of the first and second antennas formed on the first substrate, and which carries out wireless communications between the third antenna and the sixth antenna, and is stacked and mounted on the second substrate so as to have the second substrate to be sandwiched by the first substrate and the third substrate and have a portion not overlapping the second substrate, wherein
the electronic circuit carries out successive data transfer from the first substrate to the second substrate and from the second substrate to the third substrate according to control by the control substrate.
10. The electronic circuit according to claim 1, wherein two or more first substrates and second substrates are alternately stacked and mounted, the first and fourth antennas of the substrates are disposed so as to overlap each other, and a plurality of communications are simultaneously carried out via the antennas separated so as not to cause interference.
11. The electronic circuit according to claim 1, wherein the antennas consist of coils, and include a first coil which transmits a signal to a second coil, the second coil which receives the signal and a third coil which overlaps the first and second coils and is for transmission separately in synchronization with the first coil, and the diameters of the first to third coils are not less than a predetermined diameter corresponding to a distance between the first coil and the second coil, and less than a predetermined diameter by which reception of a signal by the second coil from the third coil remains at an intensity having no influence on reception of a signal from the first coil and which depends on a distance between the second coil and the third coil.