JPH0510470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a projection television receiver, and particularly to a structure that allows a back cover that is attached to protrude from the rear of the cabinet body of the projection television receiver to be housed therein.

[Conventional technology]

4 and 5 show a conventional projection type television receiver, with FIG. 4 being a sectional view thereof and FIG. 5 being a plan view thereof. In the figure, 1 is a cabinet body, 2 is a projection unit installed in the cabinet body 1, 3 is a mirror that reflects the projection light from the projection unit 2, and 4 is a mirror that receives light from the mirror 3 on the back and displays an image on the front. 5 is a back cover that supports the mirror 3 and protrudes rearward; 6 is a front opening of the cabinet body for attaching the transmissive screen 4; 7 is a cabinet for attaching the back cover 5; The rear opening of the main body 1, A is the cabinet main body 1
B is the depth dimension from the front surface of the back cover 5 to the rear surface of the back cover 5, and B is the depth dimension of the cabinet body 1.

FIG. 6 is a sectional view showing a prototype of a projection television receiver, and the same reference numerals as in FIGS. 4 and 5 are used.

A conventional projection television receiver is constructed as described above, and the light projected from the projection unit 2 forms an image on the transmission screen 4 after being reflected by the mirror 3. In this way, the transmissive screen 4 shows the enlarged image on its front. This conventional projection television receiver is made thinner by shortening the depth dimension of the cabinet body 1 from A to B. As is clear from FIG. 5, the depth dimension of the cabinet body 1 is B as seen from within the angle α, achieving the lightweight feeling of a projection television receiver. However, the depth dimension A required to obtain a predetermined image enlargement ratio is the same as the depth dimension _B1 of the original projection type television receiver shown in FIG.

The conventional projection type television receiver as described above must be packed with the same depth dimensions as the original model shown in FIG. In other words, there is no improvement in the space required for packaging, storage, and transportation over the original model shown in FIG. Furthermore, in order to meet the demand for larger images, the depth dimension A has been increased, but this makes it difficult to pass through doors and the like when the projection television receiver is transported into a general home.

In order to solve this problem, as shown in FIG. A television receiver is disclosed in Japanese Utility Model Application No. 56-74573.

In FIG. 3, 1 to 7 and A to B are exactly the same as those shown in FIG. Reference numeral 8 denotes a support device consisting of a pivot member that pivotally attaches the upper end of the back cover 5 to the upper edge of the rear opening 7 of the cabinet body 1;
is movable with respect to the cabinet body 1.

In the projection television receiver configured as described above, the back cover 5 is pivotable relative to the cabinet body 1, and the back cover 5 is stored within the space of the cabinet body 1 during packaging. When in use, the lower part of the bag cover 5 can be pulled out and held in a predetermined position. Needless to say, the lower end of the back cover can be detachably attached to the edge of the rear opening 7 using a latch type, magnet type, or the like.

[The problem that the idea aims to solve]

Although the projection television receiver with this pivot structure can reduce the space occupied during packaging, storage, and transportation, the lower edge of the back cover 5 may come into contact with the upper edge of the projection unit 2. Another problem arises in that in order to store the back cover 5 without any problems, the projection unit 2 must be positioned below and to the left of the cabinet body 1 (as viewed in FIG. 1).

The present invention has been made to solve this newly occurring problem, and is a projection television set that allows the back cover to be stored without affecting the arrangement of the projection unit 2 of the projection television receiver. The purpose is to obtain a digital receiver.

[Means to solve the problem]

In the projection television receiver according to this invention, the support device that allows the back cover to be stored is a square link mechanism.

[Effect]

In this invention, the back cover is attached to the cabinet body by a square linkage, so that the lower edge of the back cover only defines an arc of small radius of curvature.

〔Example〕

FIG. 1 is a cross-sectional view showing an embodiment of this invention, in which the back cover 5 is attached to the cabinet body 1 so that it can be stored in the interior wall surface above the upper edge of the rear opening 7 of the cabinet body 1. A mount 9 is attached to the mount 9, levers 10 and 11 of the same size are pivotally connected to the mount 9, and the lower ends of the levers 10 and 11 are attached to the upper end of the back cover 5 so that the back cover 5 can be placed at a predetermined depth dimension A. It is pivotally connected to a mount 12 near the section. A support device consisting of the parallelogram-shaped link mechanism 14 is thus constructed, so that when the back cover 5 is moved into the cabinet body 1 to be stored, the back cover 5
is moving diagonally upward parallel to the cabinet body 1.
Go inside. At this time, the locus drawn by the lower edge of the bag cover 5 is an arc with a small radius of curvature, as shown by the broken arrow. Therefore, the projection unit 2 is
Even if it is placed closer to the back cover than the position shown in the figure, it will not be an obstacle to storing the back cover 5. It is clear that the link mechanisms 14 are provided in pairs on both the left and right sides of the bag cover 5.

FIG. 2 shows another embodiment in which the bag cover 5 is attached to the cabinet body 1 so that it can be stored therein, and shows a modification of the link mechanism 14 shown in FIG. 1. A mount 9 is attached to the inner wall surface above the upper edge of the rear opening 7 of the cabinet body 1, a small lever 10 and a large lever 11 are pivotally connected to the mount 9, and the back cover 5 is moved to a predetermined depth. levers 10 and 11 so that they can be placed at
The lower end is pivotally connected to mounts 12 and 13 near the upper end of the back cover 5. In this way, a supporting device consisting of a trapezoidal link mechanism 14 in which the small-sized lever 10 is provided above the large-sized lever 11 is constructed, so that the back cover 5 can be moved into the cabinet body 1 for storage. Then, the lower end of the back cover 5 moves more than the upper end, and the back cover 5 as a whole moves obliquely upward.

[Effect of idea]

As explained above, this idea is to attach the back cover to the cabinet body via a rectangular link mechanism so that it can be stored, so that the lower edge of the back cover forms an arc with a small radius of curvature when it is stored. This has the effect that dead space is eliminated and the arrangement of the projection unit 2 is not affected by the retractable structure of the back cover 5. Of course, by reducing the size of the packaging, the size of the packaging box becomes smaller, and the packaging fee becomes cheaper.
Furthermore, the space required for storage and transportation is reduced, resulting in lower warehousing and transportation costs per item, and it also becomes easier to transport the product into homes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the invention, FIG. 2 is a sectional view showing another embodiment, and FIG. 3 is a conventional projection television receiver having a retractable back cover. 4 is a sectional view showing another conventional projection television receiver, FIG. 5 is a plan view thereof, and FIG. 6 is a sectional view showing a prototype of the projection television receiver. In the figure, 1 is the cabinet body, 2 is the projection unit, 3 is the mirror, 4 is the transmission screen,
5 is a back cover, 6 is a front opening, 7 is a rear opening, 8 is a support device (pivot member), and 14 is a support device (link mechanism). Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A cabinet body having openings on the front and rear sides, a transmission screen provided at the front opening of the cabinet body, and a projection screen mounted within the cabinet body. a back cover that protrudes and is attached so as to cover the rear opening of the cabinet main body; a projection television receiver having a mirror for projecting an image, the back cover being retractable into the cabinet body through the rear opening;
In a projection television receiver equipped with a support device for supporting the cover on the cabinet body, the support device is arranged in the vicinity of the inner wall above the upper edge of the rear opening of the cabinet body and in the vicinity of the upper end of the back cover. A projection television receiver characterized by a rectangular link mechanism connecting the two. (2) The projection television receiver according to claim 1, wherein the link mechanism is configured in the shape of a parallelogram to simply move the back cover in parallel. (3) The projection television receiver according to claim 1, wherein the link mechanism is configured in a trapezoidal shape so as to move the lower end of the back cover more than the upper end.