JP3225476B2 - Projection TV screen mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen mounting structure for a projection television (hereinafter referred to as a PTV).

[0002]

2. Description of the Related Art FIG. 8 is a perspective view of a completed PTV screen attached to a conventional PTV screen viewed from the CRT side, and FIG.
It is the perspective view which expanded the principal part of FIG. In the figure, 1 is PT
V is a design part, and a frame requiring strength as a structural part. Reference numerals 2 and 3 denote a screen F, which is a screen front panel for projecting the projected projection light as an image, and are arranged on the projection light side in close contact with the screen F. The screen R is a screen rear panel, and both of them constitute a screen, and the end of the screen is supported by the frame 1.

A screen 4 is inserted into the groove 1a of the frame 1 and the screen F2 and the screen R3 are inserted in the groove 1d.
Is an elastic screen holder that presses and fixes the end of the screen holder. Reference numeral 11 denotes a corner cap, which reinforces and strengthens the four corners of the frame 4 and improves the design.

Next, the operation will be described. The frame 1 is an external component that can be a design of the PTV, and is a component that requires strength to fix the screen F2 and the screen R3, and is usually made of a non-ferrous metal such as aluminum. The screen F2 and the screen R3 project an image projected from a cathode ray tube, and are made of a plastic material. The screen holder 4 holds the screen F
2 and the screen R3 are sandwiched between the frame 1 and fixed so as not to hinder the thermal expansion of the screen F2 and the screen R3.

The screen F2 and the screen R3 have the property of expanding due to heat and humidity, and the elongation thereof is absorbed by sliding between the frame 1 and the frame.

[0006]

Since the conventional screen mounting structure is constructed as described above, the frame 1 needs to have an external strength and a strength enough to withstand the sliding between the screen F2 and the screen R3, and is expensive aluminum. As the screen F2 and the screen R3 become thinner, it becomes necessary to fix the screen F2 and the screen R3 more firmly than ever. In addition, when screens F2 and R3 having different thicknesses are used, there is a problem that the shape and dimensions of the frame 1 and the screen holder 4 need to be changed each time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and aims at a structure capable of sufficiently withstanding the strength and satisfying the design, and at the same time, having a thinner screen F. It is an object of the present invention to provide a screen support structure having a role of preventing the screen R from firmly stopping and preventing deflection due to thermal expansion of the screen.

The mounting structure for absorbing the expansion and contraction of the screen includes Japanese Utility Model Laid-Open No. 4-478 and Japanese Utility Model Laid-Open No. 4-70645.
And JP-A-5-40315, which deal only with expansion and contraction of the screen.

[0009]

According to the present invention, there is provided a screen mounting structure for a projection television having a screen and a frame for supporting an end of the screen. A frame is provided with a reinforcing member insertion portion parallel to the groove, and a metal reinforcing member inserted into the reinforcing member insertion portion and an end of the screen inserted into the groove are positioned in front of and behind the screen. And a pressing means for pressing and supporting the frame in a direction, and a material of the frame is made of a material having a thermal expansion coefficient similar to that of the screen.

[0010] The pressing means is a means for pressing the end of the screen with the front surface of the frame via a screen holder, and the material of the screen holder has a thermal expansion coefficient similar to that of the screen. Material.

The reinforcing member is an L-shaped member, and the reinforcing member insertion portion of the frame is an L-shaped hole extending over the front and side surfaces of the frame.

The reinforcing member is a columnar member, and the reinforcing member insertion portion of the frame is a hole provided on a side surface of the frame and into which the columnar member is inserted.

In a screen mounting structure for a projection television having a screen and a frame supporting an end of the screen, one side of the L-shape is inserted into a reinforcing member insertion portion provided on a side surface of the frame in a front-rear direction of the screen. An L-shaped metal reinforcing member, which is movably inserted into the frame and whose other side of the L-shape faces the front face of the frame, comprises a front face of the frame and the reinforcing member facing the front face. Forming a groove into which the end of the screen is inserted between the other side of the screen, and pressing means for pressing and supporting the end of the screen inserted in the groove in the front-rear direction of the screen. Further, the material of the frame is a material having a thermal expansion coefficient similar to that of the screen.

Further, in a screen mounting structure of a projection television having a screen and a frame for supporting an end of the screen, a groove into which the end of the screen is inserted, and a reinforcement along the side surface at the back of the groove. A member insertion portion is provided in the frame, one side of the L-shape is inserted into the reinforcing member insertion portion so as to be movable in the front-rear direction of the screen, and another side of the L-shape and a front portion of the frame are provided. An L-shaped reinforcing member that sandwiches the end of the screen between the two, and a pressing unit that presses the reinforcing member against the end of the screen to hold the screen are provided, and that the material of the frame is It is made of a material having the same coefficient of thermal expansion as the screen.

Further, a screen composed of a screen F as a screen front panel for projecting the projected projection light as an image, a screen R as a screen rear panel arranged on the projection side of the screen F, and an end of the screen In a screen mounting structure for a projection television having a frame for supporting the frame, a groove into which the end of the screen is inserted, and a reinforcing member inserting portion parallel to the groove are provided in the frame, and the reinforcing member inserting portion is inserted into the reinforcing member inserting portion. A metal reinforcing member disposed in the groove, one end of which is inserted as a spacer between the screen F and the screen R so as to have a gap between the screen F and the screen R; , The other end sandwiches the end of the screen between the front of the frame and the other end A screen grip and a pressing means for pressing the screen grip to hold the end of the screen are provided, and the material of the frame and the screen grip is made of a material having the same coefficient of thermal expansion as the screen. Things.

[0016]

The screen mounting structure according to the present invention uses a frame made of a material having the same coefficient of thermal expansion as the screen to cope with thermal expansion, and inserts a reinforcing member into the frame to mount the frame. The frame is increased in strength and is made of an inexpensive frame that is not made of metal. The pressing means presses and supports screens having different thicknesses.

The pressing means copes with thermal expansion by pressing through a screen holder made of a material having the same thermal expansion coefficient as the material of the screen.

Further, when the reinforcing member is formed in an L-shape, and the reinforcing member is inserted over the front and side portions of the frame, the strength of the frame is increased and the frame is made of an inexpensive nonmetallic frame.

Further, the reinforcing member is a columnar member, which is inserted into the side surface of the frame to increase the strength of the frame and make the frame non-metallic and inexpensive.

Further, the reinforcing member has an L-shape, and the end of the screen is held between one side of the L-shape and the front surface of the frame. The reinforcing member serves to both support the frame and support the screen. At the same time, the pressing means presses and supports screens having different thicknesses.

The reinforcing member has an L-shape, and one side of the L-shape is inserted into the reinforcing member insertion portion of the frame so as to be movable in the front-rear direction of the screen, and the other side of the L-shape and the front portion of the frame. Between the edges of the screen,
The reinforcing member both reinforces the frame and supports the screen, and the pressing means presses and supports the screens having different thicknesses.

In addition, a frame made of a material having the same coefficient of thermal expansion as the screen is used to cope with the thermal expansion,
Further, by inserting and attaching the reinforcing member to the frame, the strength of the frame is increased, and the frame is made of an inexpensive and non-metallic material. Further, the screen is pressed and supported via a screen grip so as to be able to cope with a change in the thickness of the screen.
Screen F and screen R
One end of the screen grip is inserted as a spacer in order to provide a gap between the screen F and the screen R during transportation to prevent damage due to friction between the screen F and the screen R.

[0023]

【Example】

Embodiment 1 FIG. Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG. In the drawing, 1 is a frame, 1b is a hole for inserting a reinforcing member, and 1d is a screen F2 and a screen R3 described later.
2 is a screen F which is a screen front panel for projecting the projected light as an image, and 3 is a screen R which is a screen rear panel arranged on the projection side of the screen F2. A screen is composed of the screen R.

Reference numeral 4 denotes a screen holder which is held on the frame 1 by screws 10 so as to be movable in the front-rear direction.
When the screw 10 is rotated, it moves in the front-rear direction. 5
Reference numeral denotes a reinforcing plate which is inserted into the reinforcing member insertion hole 1b provided in the frame 1 to increase the strength of the frame.

Here, the frame 1 and the screen holder 4 are made of a material having the same level of thermal expansion as the screen F2 and the screen R3. That is, screen F
2 and the screen R3 are usually made of synthetic resin , for example,
Since the polymethyl methacrylate resin PMMA is used, the frame 1 and the screen holder 4 are also made of the same synthetic resin , for example, a well-known rigid polyvinyl chloride PVC . Reference numeral 10 denotes a screen F via the screen holder 4.
2 and a screw that presses and supports the end of the screen R3,
The amount of screwing is changed by changing the thickness of the screen, so that the structure can respond to changes in the thickness of the screen. The screw 10 and the screen holder 4 form a pressing means.

Next, the operation will be described. The screen F2 and the screen R3 used for the PTV expand and contract at an external temperature or a temperature generated from the inside.
2. The frame 1 and the screen holder 4, which are made of a material having the same thermal expansion coefficient as the screen R3, expand and contract in the same manner as the screen, so that the screen does not bend or generate stress.

The reinforcing plate 5 maintains its strength by being inserted into a reinforcing member insertion hole 1b provided in the frame 1. Further, it is better to provide a slight gap between the reinforcing member insertion hole 1b and the reinforcing plate 5 so as not to hinder the expansion and contraction of the frame 1.

The screw 10 presses the screen holder 4 against the screen F2 and the screen R3 to fix and support the screen holder 4, and even if the thickness of the screen F2 and the screen R3 changes, the screw 10 can be mounted by changing the screwing amount.

Therefore, by forming the frame 1 and the screen holder 4 from materials having the same thermal expansion coefficient as the screen F2 and the screen R3, the screen F
2. When the screen R3 expands and contracts due to temperature, etc., the frame 1
The screen holder 4 also expands and contracts in the same manner, and, for example, the frame can expand and contract in both the vertical and horizontal directions as shown in FIG.

When the reinforcing plate 5 of the frame 1 is slidable with respect to the hole 1b for the reinforcing member provided on the frame 1, the frame can freely expand and contract. Also, since the screen is pressed by the screw 10 via the screen holder 4, it is possible to cope with a change in the thickness of the screen.

In the above embodiment, the screen is composed of two screens, the screen F2 and the screen R3. However, a single screen can be applied. Also,
The insertion portion of the reinforcing member is inserted into the L-shaped reinforcing member insertion hole over the front and side portions of the frame 1, but the L-shaped reinforcing member is inserted over the rear surface and the side portion of the frame 1. Holes may be added to reinforce at two locations. Further, depending on the case, it may be a single portion extending over the rear surface and the side surface of the frame 1.

Embodiment 2 FIG. In the above-described first embodiment, the screen holder 4 corresponds to the change in the thickness of the screen F2 and the screen R3 with the screw 10 and the screen F2 and the screen R3 are fixed and supported with the screw 10 via the screen holder 4. The screen holder 4 having a resilient shape as shown in FIG.
2. The screen R3 can be fixedly supported.

The frame 1 and the screen holder 4 are made of a material having the same coefficient of thermal expansion as the screen F2 and the screen R3 as in the first embodiment, and the strength of the frame 1 is reinforced by the reinforcing plate 5. The screen holder 4 fixes the screen F2 and the screen R3 by being inserted into the groove 1a of the frame 1, and performs the same expansion and contraction as the frame 1.

Therefore, the screen F which expands and contracts depending on the temperature or the like
2. Since the frame 1 and the screen holder 4 expand and contract with the screen R3, no stress such as bending occurs on the screen F2 and the screen R3. The reinforcing plate 5 is inserted into the reinforcing member insertion hole 1b so as not to hinder sliding of the frame 1 due to heat.

In the second embodiment, it is impossible to cope with a change in the thickness of the screen unless a screen holder 4 having a different size is used. However, the screen holder 4 can be easily mounted compared to the first embodiment. it can. Further, the reinforcing plate 5 reinforces the frame 1, and the reinforcing plate 5 and the frame 1 and the screen F
2. The use of a material having a coefficient of thermal expansion similar to that of the screen R3 has an effect of preventing bending or the like.

Embodiment 3 FIG. FIG. 3 shows the reinforcing plate 5 according to the second embodiment as a reinforcing pipe 7. Action, effect,
This is the same as the second embodiment. In this case, the reinforcing pipe 7 is used as the reinforcing member. However, the reinforcing pipe 7 may be not a cylinder like a pipe but a square or a triangle. Also, it may be a rod-shaped object instead of a cylindrical one. Further, the position where the reinforcing member is inserted may be provided on the front surface or the rear surface of the frame 1. If necessary, reinforcing members may be inserted at two places. In addition, you may combine with the L-shaped reinforcement member of Example 1.

Embodiment 4 FIG. 4 shows that a frame 1 is provided with a groove 1c for inserting a reinforcing member.
One side of the metal-made reinforcing member 5 is inserted into the groove 1c in an L-shape, and the other side faces the front surface of the frame 1 and the groove 1c.
forming d. The ends of the screen F2 and the screen R3 are inserted into the groove 1d, and the screen holder 4 is inserted to press and support the screen F2 and the screen R3.

The frame 1 and the screen holder 4 are formed of a material having the same thermal expansion coefficient as the screen F2 and the screen R3. The screen holder 4 can favorably support the screen if it has a spring action. The operation and effects of this embodiment are the same as those of the second embodiment, but the structure is simplified because the reinforcing member 5 can both reinforce the frame 1 and support the screen.

Fifth Embodiment FIG. 5 omits the holder plate 6 of the fifth embodiment and uses screws 10 as the pressing means. The screws 10 fix and support the screen F2 and the screen R3.
This pressing means can easily cope with screens having different thicknesses.

Embodiment 6 FIG. 6 is an improvement of Embodiment 5. In the fifth embodiment, the screen R3 is fixedly supported by being directly pressed with the screw 10, but in this embodiment, the holder plate 6 is used as a reinforcing member.
And presses and supports the screen R3. That is, the function of the reinforcing plate 5 and the screen holder 4 of the first embodiment is also used.

The frame 1 is made of a material having the same coefficient of thermal expansion as the screens F2 and R3, and the holder plate 6 is made of metal or non-ferrous metal, and has an effect as a reinforcing member.

Embodiment 7 FIG. FIG. 7 shows a seventh embodiment. The screen clip 9 is made of a material having the same coefficient of thermal expansion as the screen F2 and the screen R3. One end of the screen clip 9 is partially inserted between the screen F2 and the screen R3 as a spacer 9a. A predetermined gap is provided between the screen and the screen R3. The other end of the screen grip 9 is a screen F
2 and the end of the screen R3 are formed so as to face each other. The ends of the screen F2 and the screen R3 are pressed and supported by screws 10 via the screen grip 9.

With such a structure, PT
Vibration generated during the transport of V has the effect of preventing or reducing scratches and powdering due to rubbing between screen F2 and screen R3.

[0044]

As described above, according to the present invention, since the frame is made of a material having the same thermal expansion coefficient as that of the screen, a clear image can be displayed without bending the screen. In addition, mechanical strength can be obtained by inserting the reinforcing member into the frame, and an inexpensive frame made of non-metallic material can be obtained. In addition, since the pressing means is capable of pressing and supporting screens having different thicknesses, there is an effect of being able to cope with a change in the thickness of the screen.

Further, since the pressing means is pressed through the screen holder made of a material having the same thermal expansion coefficient as the material of the screen, there is an effect that the thermal expansion of the screen can be dealt with.

Further, since the reinforcing member is L-shaped and inserted over the front and side portions of the frame, the strength of the frame is increased and an inexpensive non-metallic frame can be obtained. .

Further, since the reinforcing member is a columnar member and is inserted into the side surface of the frame to increase the strength of the frame, an inexpensive non-metallic frame can be obtained.

Further, the reinforcing member is formed in an L-shape, and the end of the screen is held between one side of the L-shape and the front portion of the frame, and the reinforcing member performs both the reinforcing and the supporting of the screen. This has the effect of simplifying the structure.

The reinforcing member is formed in an L-shape, and one side of the L-shape is inserted into the groove for inserting the reinforcing member of the frame so as to be movable in the front-rear direction of the screen, and the other side of the L-shape is connected to the frame. Since the end of the screen is sandwiched between the front surface and the reinforcing member for both reinforcing and supporting the frame, there is an effect capable of coping with a change in the thickness of the screen.

Further, since one end of the screen grip is inserted as a spacer in order to provide a gap between the screen F and the screen R, an effect of preventing damage due to friction between the screen F and the screen R during transportation is provided. There is.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view showing a screen mounting structure according to a first embodiment of the present invention.

FIG. 2 is a sectional perspective view showing a screen mounting structure according to a second embodiment of the present invention.

FIG. 3 is a sectional perspective view showing a screen mounting structure according to a third embodiment of the present invention.

FIG. 4 is a sectional perspective view showing a screen mounting structure according to a fourth embodiment of the present invention.

FIG. 5 is a sectional perspective view showing a screen mounting structure according to a fifth embodiment of the present invention.

FIG. 6 is a sectional perspective view showing a screen mounting structure according to a sixth embodiment of the present invention.

FIG. 7 is a sectional perspective view showing a screen mounting structure according to a seventh embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional screen mounting structure.

FIG. 9 is a sectional perspective view of a main part of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 1a Groove 1b Reinforcement member insertion hole (reinforcement member insertion portion) 1c Reinforcement member insertion groove (reinforcement member insertion portion) 1d groove 2 Screen F 3 Screen R 4 Screen holder 5 Reinforcement plate (reinforcement member) 6 Holder plate 7 Reinforcement pipe (reinforcement member) 9 Screen clip 9a Spacer 10 Screw 11 Corner cap

Claims (7)

(57) [Claims] 1. A screen mounting structure for a projection television having a screen and a frame supporting an end of the screen, wherein a groove into which the end of the screen is inserted and a reinforcing member insertion portion parallel to the groove are formed by a frame. In addition, provided a metal reinforcing member inserted into the reinforcing member insertion portion, and a pressing means for pressing and supporting the end of the screen inserted in the groove in the front-rear direction of the screen, A screen mounting structure for a projection television, wherein the material of the frame is a material having a thermal expansion coefficient substantially equal to that of the screen. 2. The pressing means is a means for pressing through a screen holder which sandwiches the end of the screen between the screen and the front part of the frame, and the material of the screen holder has a thermal expansion coefficient similar to that of the screen. 2. A screen mounting structure for a projection television according to claim 1, wherein the screen mounting structure is made of a material having the same. 3. The reinforcing member is an L-shaped member,
2. The frame according to claim 1, wherein the reinforcing member insertion portion of the frame is an L-shaped hole extending over a front portion and a side portion of the frame.
Item 3. A screen mounting structure for a projection television according to item 2 or 2. 4. The reinforcing member is a columnar member, and the reinforcing member insertion portion of the frame is a hole provided on a side surface of the frame and into which the columnar reinforcing member is inserted. Item 3. A screen mounting structure for a projection television according to item 2 or 2. 5. A screen mounting structure for a projection television having a screen and a frame supporting an end of the screen, wherein one side of the L-shape is inserted into a reinforcing member insertion portion provided on a side surface of the frame in a front-rear direction of the screen. An L-shaped metal reinforcing member, which is movably inserted into the frame and whose other side of the L-shape faces the front face of the frame, comprises a front face of the frame and the reinforcing member facing the front face. Forming a groove into which the end of the screen is inserted between the other side of the screen, and pressing means for pressing and supporting the end of the screen inserted in the groove in the front-rear direction of the screen. A screen mounting structure for a projection television, wherein the material of the frame is a material having a thermal expansion coefficient substantially equal to that of the screen. 6. A screen mounting structure for a projection television having a screen and a frame for supporting an end of the screen, wherein a groove into which the end of the screen is inserted, and a reinforcement along the side surface at the back of the groove. A member insertion portion is provided in the frame, one side of the L-shape is inserted into the reinforcing member insertion portion so as to be movable in the front-rear direction of the screen, and another side of the L-shape and a front portion of the frame are provided. L sandwiching the end of the screen between
A material having a letter-shaped reinforcing member and pressing means for pressing the reinforcing member against the end of the screen to hold the screen, and wherein the material of the frame has a thermal expansion coefficient substantially equal to that of the screen. A screen mounting structure for a projection television. 7. A screen comprising a screen F as a screen front panel for projecting the projected projection light as an image, a screen R as a screen rear panel disposed on the projection side of the screen F, and an end of the screen. In a screen mounting structure for a projection television having a frame for supporting the frame, a groove into which the end of the screen is inserted, and a reinforcing member inserting portion parallel to the groove are provided in the frame, and the reinforcing member inserting portion is inserted into the reinforcing member inserting portion. A metal reinforcing member disposed in the groove, one end of which is inserted as a spacer between the screen F and the screen R so as to have a gap between the screen F and the screen R; A screen whose other end sandwiches the end of the screen between the front of the frame and the other end. A lean grip and a pressing means for pressing the screen grip to hold the end of the screen are provided, and the material of the frame and the screen grip is made of a material having the same coefficient of thermal expansion as the screen. A screen mounting structure for a projection television.