Projection type television receiver, and manufacturing method thereof

A projection type television receiver comprising:

• (a) a chassis,
• said chassis including a lower cabinet, a speaker box, an inclined partition unit, and an optical unit extending above said inclined partition unit,
• (b) a projection unit installed at the upper side of said chassis,
• said projection unit including an upper cabinet, and a transmission type screen installed on said upper cabinet,
• wherein said lower cabinet and speaker box are mutually formed integrally, thereby enhancing the rigidity of the lower cabinet.

A projection type television receiver comprising:

• (a) a chassis,
• said chassis including a lower cabinet, a lower cover fitted to said lower cabinet, an image display device, a speaker box, a speaker system, an inclined partition unit, an optical unit extending above said inclined partition unit, and a control circuit, and
• (b) a projection unit installed at the upper side of said chassis,
• said projection unit including an upper back cover, an upper cabinet, a transmission type screen, and a reflection mirror,
• wherein said speaker box is formed integrally with said lower cabinet, at both corners of the top side of the lower cabinet, and
• said speaker box has a plurality of ribs disposed on the top of the speaker box,
• thereby preventing the vibration generated in the speaker box from transmitting to the projection unit.

A projection type television receiver comprising:

• (a) a chassis,
• said chassis including a lower cabinet, a lower cover fitted to said lower cabinet, an image display device, a speaker system, an inclined partition unit, an optical unit extending above said inclined partition unit, and a control circuit, and
• (b) a projection unit installed at the upper side of said chassis,
• said projection unit including an upper cabinet, an upper back cover fitted to said upper cabinet, a transmission type screen, and a reflection mirror,
• wherein said lower cabinet includes a speaker box having a guide rib and a side wall enclosing a space on a top of the speaker box,
• said upper back cover has a guide disposed at the lower side of the upper back cover, said guide being fitted into the space.

A projection type television receiver comprising:

• (a) a chassis,
• said chassis including a lower cabinet, a lower cover fitted to said lower cabinet, an image display device, a speaker system, an inclined partition unit, an optical unit extending above said inclined partition unit, and a control circuit, and
• (b) a projection unit installed at the upper side of said chassis,
• said projection unit including an upper cabinet, an upper back cover fitted to said upper cabinet, a transmission type screen, and a reflection mirror,
• wherein said lower cabinet further includes a left supplementary side wall disposed detachably connected to the left part of the lower cabinet, and a right supplementary side wall disposed detachably connected to the right part of the lower cabinet,
• thereby the dimension of the lower cabinet is variable, corresponding to a change of a width dimension of the upper cabinet.

A projection type television receiver comprising:

• (a) a chassis,
• said chassis including a lower cabinet, a lower cover fitted to said lower cabinet, an image display device, a speaker system, an inclined partition unit, an optical unit extending above said inclined partition unit, and a control circuit,
• (b) a projection unit installed at the upper side of said chassis,
• said projection unit including an upper back cover, an upper cabinet, a transmission type screen, and a reflection mirror, and
• (c) a first plumb disposed at and fastened to a bottom of the lower cabinet and a second plumb disposed in the rear part of the upper back cover,
• wherein said chassis and projection unit are mutually linked, thereby preventing tumbling.

A manufacturing method of projection type television receiver comprising the steps of:

• (a) making a lower cabinet,
• (b) forming a speaker box integrally in the lower cabinet,
• (c) making a lower back cover,
• (d) making an upper cabinet,
• (e) making an upper back cover,
• (f) fitting the lower back cover to the lower cabinet, and
• (g) coupling the upper back cover and upper cabinet on the speaker box in the lower cabinet by coupling means.