Lock device, display apparatus and liquid crystal apparatus

A lock device for securing at an arbitrary revolution angle a supported body revolvably supported by a support, comprising:

• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually reverse winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members for attachment to the support or supported body so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free ends of the two torsion springs when the supported body is revolved in a reverse direction relative to the winding direction of said torsion springs.

A lock device for securing at an arbitrary revolution angle a supported body revolvably supported by a support, comprising:

• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually identical winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members for attachment to the support or supported body so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free end of one of said two torsion springs when the supported body is revolved in a reverse direction relative to the winding direction of said one of said two torsion springs.

A display apparatus, comprising:

• (A) a display panel;
• (B) a support for supporting said display panel;
• and
• (C) a lock device including:
• a revolution shaft;
• a torsion spring into which said revolution shaft is inserted in an intimately contacting state, said torsion spring having a free end side and a fixed end,
• a holding member attached to said support or said display panel so as to hold said revolution shaft rotatably and having an engaging part engaged with the fixed end of said torsion spring;
• a stopper member secured to said revolution shaft at the free end side of said torsion spring for preventing the fixed end of said torsion spring from coming off of said engaging part;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between said stopper member and the free end of said torsion spring so as to abut to and rotate together with the free end of said torsion spring when said display panel is revolved in a reverse direction relative to the winding direction of said torsion spring.

A liquid crystal apparatus, comprising:

• (A) a liquid crystal panel;
• (B) a support for supporting said display panel revolvably;
• and
• (C) a lock device including:
• a revolution shaft;
• a torsion spring into which said revolution shaft is inserted in an intimately contacting state, said torsion spring having a free end side and a fixed end,
• a holding member attached to said support or said liquid crystal panel so as to hold said revolution shaft rotatably and having an engaging part engaged with the fixed end of said torsion spring;
• a stopper member secured to said revolution shaft at the free end side of said torsion spring for preventing the fixed end of said torsion spring from coming off of said engaging part;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between said stopper member and the free end of said torsion spring so as to abut to and rotate together with the free end of said torsion spring when said liquid crystal panel is revolved in a reverse direction relative to the winding direction of said torsion spring.

A display apparatus, comprising:

• (A) a display panel;
• (B) a support for supporting said display panel revolvably;
• and
• (C) a lock device including:
• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually reverse winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members attached to said support or display panel so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free ends of said two torsion springs when said display panel is revolved in a reverse direction relative to the winding direction of said torsion springs.

A liquid crystal apparatus, comprising:

• (A) a liquid crystal panel;
• (B) a support for supporting said liquid crystal panel revolvably;
• and
• (C) a lock device including:
• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually reverse winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members attached to said support or said liquid crystal panel so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free ends of said two torsion springs when said liquid crystal panel is revolved in a reverse direction relative to the winding direction of said torsion springs.

A display apparatus, comprising:

• (A) a display panel;
• (B) a support for supporting said display panel revolvably;
• and
• (C) a lock device including:
• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually identical winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members attached to said support or said display panel so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free ends of one of said two torsion springs when said display panel is revolved in a reverse direction relative to the winding direction of said one of said two torsion springs.

A liquid crystal apparatus, comprising:

• (A) a liquid crystal panel;
• (B) a support for supporting said liquid crystal panel revolvably;
• and
• (C) a lock device including:
• a revolution shaft;
• two torsion springs into which said revolution shaft is inserted in an intimately contacting state, said two torsion springs each having a fixed end and a free end and having mutually identical winding directions with respect to their mutually opposite respective elongation directions from each fixed end to the free end;
• a pair of holding members attached to said support or said liquid crystal panel so as to hold said revolution shaft rotatably and respectively having engaging parts engaged with the respective fixed ends of said two torsion springs;
• and
• an interlocked rotating member disposed rotatably on said revolution shaft between the fixed ends of said two torsion springs so as to abut to and rotate together with the free ends one of said two torsion springs when said liquid crystal panel is revolved in a reverse direction relative to the winding direction of said one of said two torsion springs.