JP2006267255A - Rear projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear projection device designed such that even in the case of a multi-screen, screen units can be opened/closed with small spacing between the screen units and the screen units can be disposed flat with respect to one another. <P>SOLUTION: Each screen unit 12 for displaying images or character information, etc., on its front face is disposed in the opening of a housing 11. Slide means 14 slide each screen unit 12 to the position in front of the opening of the housing 11 along its length. While the lift parts 16 of screen attaching/detaching means 20 are held by lift part holders 21, the screen unit 21 is attached so as to be freely detached. While kept slid to the position in front of the housing 11, the screen unit 21 is turned upward by extending/retracting devices 18 with the lift parts 16 via support poles 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rear projection device that displays video, character information, and the like on the front side of a screen unit from the back side of the screen unit.

  The rear projection device arranges a screen unit in the opening provided in the front of the housing, houses the light source and the optical system in the housing, and projects images such as video and text information from the back side of the screen unit To do. A large screen is configured by stacking a plurality of rear projection apparatuses to form a multi-screen. Since such rear projection equipment uses consumables such as a light source, the screen unit can be opened and closed so that the parts can be replaced from the front when the consumables stored in the housing break down. Yes.

Some of them are designed to display the lifetime and temperature of the light source while reducing the time and labor required for the replacement of the light source (see, for example, Patent Document 1). In other words, the screen unit is rotatably provided in the opening at the top front of the housing, the light source unit and the optical system are arranged inside the housing, and the light source unit is located above the optical system so as to be close to the opening. It is positioned and housed in a light source housing provided on the inner surface of the front plate. Thereby, when the screen unit is opened at the time of replacement of the light source, the light source can be replaced from the opening.
Japanese Patent Laid-Open No. 9-230285

  However, in Patent Document 1, the pivotal support point of the screen unit is at the upper part of the casing, so that the joint portion becomes thick. That is, a rotation mechanism is used to open and close the screen unit, and its fulcrum is located in the housing, so when the screen unit is rotated, the screen unit may come into contact with the housing located at the top. In order to avoid the contact, a slight gap is required between the screen units. When a slight gap is provided between the screen units, there is a problem that when the screen size is enlarged by combining a plurality of housings, the image is cut at the joint of the screen units.

  In the multi-screen, it is important that the screen units are flat. However, when there is a movable part for opening and closing the screen unit, the front and rear flats may be insufficient.

  An object of the present invention is to provide a rear projection device in which a screen unit can be opened and closed even when a multi-screen is used, and the screen units can be opened and closed flatly.

  A rear projection apparatus according to a first aspect of the present invention is a screen unit that is disposed in an opening of a housing and displays images, character information, and the like on a front surface thereof; and the screen unit disposed in front of and behind the opening of the housing. Slide means for sliding; screen detachment means provided on the slide means for detachably attaching the screen unit and rotating the screen unit upward in a state in which the screen unit slides forward of the housing. It is characterized by comprising;

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

  The rear projection apparatus includes a casing and a screen unit. The light projection and the optical system are housed in the casing, and the screen unit is disposed in the opening of the casing. Then, an image such as video or character information is projected on the front surface of the screen unit from the back side of the screen unit. It is also possible to configure a multi-screen by arranging a plurality of rear projection apparatuses vertically and horizontally.

  For example, the sliding means is a mechanism that is provided on the inner side surface of the housing, holds the screen unit via the screen attaching / detaching means, and slides the screen unit forward and backward in the forward direction of the opening. The screen unit arranged in the opening of the housing is pulled out forward, or the screen unit pulled out forward is returned to the position of the opening of the housing. That is, the screen unit is slid back and forth in the front direction of the opening of the housing.

  The screen attaching / detaching means is provided on the sliding means, and the screen unit is detachably attached. Then, the screen unit is rotated upward in a state where the screen unit is slid forward of the casing by the sliding means.

  Accordingly, the screen unit is slid from the housing to the front of the housing, and then the screen unit is rotated upward. Further, the screen unit can be detached from the screen attaching / detaching means after the screen unit is rotated upward. Therefore, a gap between adjacent housings can be reduced, and parts can be replaced and maintenance work can be performed from the front surface of the housing.

  A rear projection apparatus according to a second aspect of the present invention includes a screen unit that is disposed in an opening of a housing and displays a video, character information, and the like on a front surface thereof; and the screen unit in front and rear of the opening of the housing. Slide means for sliding; screen detachment means provided on the slide means for detachably attaching the screen unit and rotating the screen unit upward in a state in which the screen unit slides forward of the housing. Screen adjusting means for adjusting the tilt of the front surface of the screen unit.

  The present invention is provided by adding screen adjusting means to the invention of claim 1. The screen adjusting means adjusts the position where the screen attaching / detaching means holds the screen unit. For example, the screen adjusting means adjusts the holding positions at the four corners of the screen unit. Thereby, each screen unit when a multi-screen is constituted by a plurality of rear projection devices can be adjusted to be flat.

  A rear projection apparatus according to a third aspect of the present invention is the rear projection device according to the first or second aspect, wherein the screen attaching / detaching means is detachably engaged with the screen unit and holds the screen unit; A support pole which is pivotally attached to the slide means as a fulcrum and whose other end is pivotally attached to the lift part and supports the lift part; one end of the slide on the front side of the fulcrum of the support pole; The other end is slidably attached to the support pole as a fulcrum, and expands and contracts with the movement of the lift part, and the lift part as the sliding position of the support pole changes. A telescopic device for rotating the telescopic device; and restraining the expansion and contraction of the telescopic device when the lift part is at the position of the slide means Characterized by comprising a; stopper and that.

  The present invention specifies a specific configuration of the screen attaching / detaching means according to the first or second aspect of the invention.

  The lift part is detachably engaged with the screen unit and holds the screen unit. For example, the lift part is detachably engaged with the lift part holding part provided in the screen unit and holds the screen unit.

  The support pole has one end rotatably attached to the sliding means as a fulcrum and the other end rotatably attached to the lift portion to support the lift portion. The support pole rotates around the fulcrum of the slide means, and the lift portion rotates upward along with this rotation. As a result, the screen unit held by the lift portion rotates upward.

  The telescopic device has one end pivotally attached as a fulcrum to the slide means on the front side from the fulcrum of the support pole, and the other end slidably attached to the support pole. The expansion / contraction device is constituted by a damper mechanism, for example, and always maintains an extension force. The one end of the expansion / contraction device is provided as a fulcrum on the slide means on the front side of the fulcrum of the support pole so that the support pole is not moved by the extension force of the expansion / contraction device when the lift part is at the position of the slide means. Because. The stopper is provided to constrain the extension force of the telescopic device when the lift part is at the position of the slide means.

  The telescopic device rotates around the fulcrum of the sliding means when the lift part is pulled out in front of the housing in conjunction with the screen unit. Since the expansion / contraction device always maintains the extension force, the extension device expands with the movement of the lift portion, changes the sliding position of the support pole, and rotates the lift portion with the change of the sliding position.

  A rear projection apparatus according to a fourth aspect of the present invention is the rear projection apparatus according to any one of the first to third aspects, further comprising a locking means for connecting and releasing the casing and the screen unit. And

  The present invention is provided by adding a locking means to the invention according to any one of claims 1 to 3. The lock means is used to connect and release the housing and the screen unit.

  The lock means has, for example, a lock mechanism part and a locking part, and locks the screen unit to the housing so that the screen unit detachably attached to the slide means does not accidentally come off.

  The rear projection apparatus according to a fifth aspect of the present invention is the rear projection apparatus according to the fourth aspect of the present invention, wherein the locking means is a locking mechanism provided on the back side of the screen unit; and the locking mechanism provided on the casing; A locking portion that does not generate a pressing force when engaged, and generates a pressing force on the locking mechanism when the engagement with the locking mechanism is released; provided on the side of the screen unit; And an operation portion for performing an engagement / disengagement operation between the lock mechanism portion and the locking portion.

  The present invention specifies a specific configuration of the lock means of claim 4. The lock means is provided with a lock mechanism portion on the back side of the screen unit, a locking portion that engages with the lock mechanism portion is provided on the housing, and an operation for engaging and releasing the engagement between the lock mechanism portion and the locking portion. An operation unit for performing the operation is provided on the side of the screen unit. The engaging portion has a function of generating a pressing force in the locking mechanism portion when the engaging portion is engaged with the locking mechanism portion, and no pressing force is generated when the engaging portion is released. Thereby, when the lock is released by the operation unit, the screen unit is pushed forward via the lock mechanism unit.

  The rear projection device according to a sixth aspect of the invention is characterized in that the locking means is provided on the housing and has a locking portion having a pressing force toward the back side of the screen unit; provided on the back side of the screen unit. A locking mechanism that releases the engagement with the locking portion when a pressing force applied to the front surface of the screen unit is equal to or greater than a predetermined value, and maintains the engagement with the locking portion when the pressing force is equal to or less than a predetermined value; It is provided with.

  The present invention specifies a specific configuration of the lock means that does not require an operation unit. A lock mechanism portion is provided on the back side of the screen unit, and a locking portion that engages with the lock mechanism portion is provided on the housing.

  The locking portion has a pressing force toward the back side of the screen unit and engages with the lock mechanism portion. The lock mechanism part releases the engagement with the locking part when the pressing force applied to the front surface of the screen unit is equal to or greater than a predetermined value, and maintains the engagement with the locking part when the pressing force is equal to or less than the predetermined value. Thereby, the operation part which performs operation of engagement and a disengagement with a locking mechanism part and a latching part becomes unnecessary.

  According to the first and third aspects of the present invention, the screen unit can be pulled forward by the sliding means, and the gap between adjacent housings can be reduced when a multi-screen is configured. Further, since the screen unit is rotated upward by the screen attaching / detaching means, it can be opened and closed even with the screen unit attached, and a simple operation such as lamp replacement can be completed in a short time. Furthermore, since the screen unit can be removed, the front surface of the housing can be opened, and work from the front surface becomes possible.

  According to the invention of claim 2, since the screen unit can be adjusted to flat by the screen adjusting means, each screen unit when a multi-screen is configured can be adjusted to flat.

  According to the fourth, fifth, and sixth aspects of the invention, the screen unit can be locked to the housing by the locking means, so that the screen unit detachably attached to the sliding means can be prevented from being inadvertently removed.

  1A and 1B are configuration diagrams of a rear projection apparatus according to an embodiment of the present invention. FIG. 1A is a perspective view of a housing 11 and FIG. 1B is a perspective view of a screen unit 12. In FIG. 1A, slide means 14 is provided on the inner side surface of the housing 11 toward the opening 13. The slide means 14 is guided by the slide rail 15 and is slidable forward and backward in the forward direction of the opening 13 of the housing 11.

  A screen attaching / detaching means 20 including a lift part 16, a support pole 17, a telescopic device 18, and a stopper 19 is provided at the tip of the slide means 14. The lift part 16 of the screen attaching / detaching means 20 is for holding the screen unit 12 and is detachably engaged with the lift part holding part 21 of the screen unit 12 as shown in FIG. Hold.

  One end of the support pole 17 is pivotally attached to the slide means 14 as a fulcrum A1, and the other end is pivotally attached to the lift portion 16 as a fulcrum A2. Thereby, the lift part 16 is supported. The telescopic device 18 has one end rotatably attached to the slide means 14 as a fulcrum B1 and the other end slidably attached to the support pole 17 as a fulcrum B2. The expansion / contraction device 18 is constituted by a damper mechanism, for example, and always maintains an extension force. The stopper 19 is provided to restrain the extension force of the expansion / contraction device 18 when the lift portion 16 is at the position of the slide means 14.

  FIG. 2 is an explanatory diagram of the operating state of the screen attaching / detaching means 20. FIG. 2A shows a state where the lift portion 16 is at the position of the slide means 14. The telescopic device 18 has one end attached as a fulcrum B1 at a position on the front side from the fulcrum A1 of the support pole 17 by a distance d. This is because, when the lift portion 16 is at the position of the slide means 14, a force for pushing up the lift portion 16 via the support pole 17 is exerted on the upper right in FIG. is there. That is, the force that pushes up the lift portion 16 has the right direction component of FIG. 2A so that the lift portion 16 does not move in the left direction of FIG. The pushing force at this time is received by the stopper 19. Thereby, when the fulcrum B2 of the expansion / contraction device 18 is behind the fulcrum B1 of the expansion / contraction device 18, the screen unit 12 held by the lift unit 16 works in the closing direction, and when it is in the front side, the screen unit 12 opens. Work in the direction.

  In the state of FIG. 2A, the telescopic device 18 pushes the lift part 16 upward and to the right via the support pole 17, and the lift force 16 is received by the stopper 19, so the lift part 16 is stationary. When the screen unit 12 is pulled forward from the housing 11 in this state, the lift portion 16 is pulled forward from the housing 11 in conjunction with the screen unit 12. Then, as shown in FIG. 2 (b), the telescopic device 18 rotates about the fulcrum B1 of the sliding means 14 and extends to push the support pole 17 upward. With this pushing-up force, the support pole 17 rotates around the fulcrum A1 of the slide means 14.

  As shown in FIG. 2C, the telescopic device 18 pushes the support pole 17 upward, thereby pushing the lift part 16 upward and pushing the screen unit 12 held by the lift part 16 upward. Accordingly, the screen unit 12 is positioned above the opening 13 of the housing 11.

  As described above, the slide means 13 that is guided by the slide rail 15 and moves back and forth is provided in the casing 11, and the screen unit 12 is pulled out of the casing 11 by the slide means 14 and then lifted upward. Then, a force that pushes the lift portion 16 upward through the support pole is acted by the expansion / contraction device 18 of the screen attaching / detaching means 20, so that the lift portion 16 moves above the opening portion 13 of the housing 11 while rotating. Thus, simple operations such as component replacement can be performed in a short time because the screen unit 12 is mounted on the lift portion 16. In addition, since the lift unit 16 and the screen unit 12 are detachable, the screen unit 12 can be detached from the lift unit 16 when performing complicated operations such as adjusting the position of the projected image. is there.

  Next, screen adjusting means for adjusting the tilt of the front surface of the screen unit 12 will be described. FIG. 3 is an explanatory diagram of a multi-screen device using a plurality of rear projection devices 10, FIG. 3 (a) is a front view of the multi-screen device, and FIG. 3 (b) is a screen unit 12 portion of the rear projection device 10. FIG. FIG. 3A shows a multi-screen device formed by using six rear projection devices 10. Thus, when a multi-screen device is formed using a plurality of rear projection devices 10, the screen unit 12 of each rear projection device 10 is not necessarily flat as shown in FIG. There may not be.

  FIG. 4 is an explanatory diagram of the screen adjusting means 22. The screen adjusting means 22 adjusts the position where the lift unit 16 of the screen attaching / detaching means 20 holds the screen unit 12. The screen adjusting means 22 is provided in the lift part holding part 21 of the screen unit 12 so that the lift part holding part 21 of the screen unit 12 is hooked on the lift part 16. The screen adjustment means 22 has two adjustment screws 23 and adjusts the position of the lift portion holding portion 21 of the hooked screen unit 12 with the adjustment screws 23. Thereby, each screen unit 10 at the time of comprising a multi-screen apparatus with the some rear projection apparatus 10 can be adjusted to flat.

  Next, a description will be given of locking means for connecting and releasing the casing 11 and the screen unit 12. FIG. 5 is an explanatory view showing an example of the locking means. The locking means includes a lock mechanism portion 24, a locking portion 25, and an operation portion 26. As shown in FIGS. 5A and 5B, a lock mechanism 24 is provided on the back side of the screen unit 12, and as shown in FIG. An engaging portion 25 to be engaged is provided. Further, as shown in FIGS. 5A and 5B, an operation portion 26 that performs an engagement / disengagement operation between the lock mechanism portion 24 and the locking portion 25 is provided on the side surface side of the screen unit 12. ing. FIG. 5A shows the positions of the lock mechanism 24 and the operation unit 26 when the lock mechanism 24 is engaged with the locking unit 25, and the operation unit 26 in the direction of the arrow in FIG. Is operated, the lock mechanism portion 24 releases the engagement with the tilt locking portion 25 as shown in FIG.

  FIG. 6 is an explanatory diagram of an engaged state between the lock mechanism portion 24 and the locking portion 25. FIG. 6A shows a state when the lock mechanism portion 24 is engaged with the locking portion 25, and FIG. 6B shows that the lock mechanism portion 24 is disengaged from the locking portion 25. Shows the state.

  The locking part 25 has a function of generating a pressing force on the lock mechanism part 24 side. 6A and 6B show a case where a pressing force is generated by a spring member. As shown in FIG. 6A, when the locking portion 25 is engaged with the lock mechanism portion 24, no pressing force is generated, and the lock mechanism portion 24 is engaged with the locking portion 25. On the other hand, when the lock mechanism 24 is brought into the state of FIG. 5B by the operation of the operation unit 26, the pressing force is applied from the lock mechanism 24 side to the locking part 25 as shown in FIG. 6B. F1 works and the engagement with the locking portion 25 is released, and the locking portion 25 generates a pressing force F2 that opposes the pressing force F1 by the spring member. As a result, when the lock is released by the operation unit 26, the pressing force F2 acts from the locking unit 24 via the lock mechanism unit 24, and the screen unit 12 is pushed forward. This locking means prevents the screen unit 12 from being inadvertently detached from the casing 11.

  FIG. 7 is an explanatory diagram of an engagement state between the lock mechanism portion 24 and the locking portion 25 in another example of the lock means. An example of this is locking means that does not require the operation unit 26. FIG. 7A shows a state when the lock mechanism portion 24 is engaged with the locking portion 25, and FIG. 7B shows that the lock mechanism portion 24 is disengaged from the locking portion 25. Shows the state.

  As shown in FIG. 7A, the locking portions 25 a and 25 b have a pressing force in the rear side direction of the screen unit 12 and are engaged with the lock mechanism portion 24. When the pressing force applied to the front surface of the screen unit 12 is greater than or equal to a predetermined value, the lock mechanism portion 24 bends upward as shown in FIG. 7B and releases the engagement with the locking portions 25a and 25b. On the other hand, when it is below the predetermined value, the engagement with the locking portions 25a and 25b is maintained. Thereby, the operation part which performs operation of engagement / disengagement with the lock mechanism part 24 and the latching | locking part 25a, 25b becomes unnecessary.

  As described above, according to the embodiment of the present invention, in order to remove the screen unit 12 from the housing 11, the engagement between the housing 11 and the screen unit 12 is released by the locking means, and the screen unit 12 is moved. Since the screen unit 12 is rotated upward after being pulled forward, the opening of the housing 11 can be opened with the screen unit 12 attached. Therefore, a simple operation can be performed with the screen unit 12 attached. Moreover, each screen unit when a multi-screen is configured can be adjusted to be flat.

The block diagram of the rear projection apparatus concerning embodiment of this invention. Explanatory drawing of the operation state of the screen attaching / detaching means in embodiment of this invention. Explanatory drawing of the multi-screen apparatus formed using the rear projection apparatus concerning embodiment of this invention. Explanatory drawing of the screen adjustment means in embodiment of this invention. Explanatory drawing which shows an example of the locking means in embodiment of this invention. Explanatory drawing of the engagement state of the locking mechanism part and locking part of the locking means shown in FIG. Explanatory drawing of the engagement state of the locking mechanism part of another example of the locking means in embodiment of this invention, and a latching | locking part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Rear projection apparatus, 11 ... Housing | casing, 12 ... Screen unit, 13 ... Opening part, 14 ... Sliding means, 15 ... Slide rail, 16 ... Lift part, 17 ... Support pole, 18 ... Telescopic device, 19 ... Stopper, DESCRIPTION OF SYMBOLS 20 ... Screen attaching / detaching means, 21 ... Lift part holding | maintenance part, 22 ... Screen adjustment means, 23 ... Adjustment screw, 24 ... Locking mechanism part, 25 ... Locking part, 26 ... Operation part

Claims (6)

A screen unit disposed in the opening of the housing and displaying video, text information, etc. on the front;
Slide means for sliding the screen unit forward and backward in front of the opening of the housing;
A screen attaching / detaching means provided on the sliding means, detachably attached to the screen unit, and rotating the screen unit upward in a state where the screen unit slides forward of the housing;
A rear projection apparatus comprising: A screen unit disposed in the opening of the housing and displaying video, text information, etc. on the front;
Slide means for sliding the screen unit forward and backward in front of the opening of the housing;
A screen attaching / detaching means provided on the sliding means, detachably attached to the screen unit, and rotating the screen unit upward in a state where the screen unit slides forward of the housing;
Screen adjusting means for adjusting the tilt of the front surface of the screen unit;
A rear projection apparatus comprising: The screen attaching / detaching means includes
A lift part detachably engaged with the screen unit and holding the screen unit;
A support pole that has one end rotatably attached to the slide means as a fulcrum and the other end rotatably attached to the lift part;
One end is pivotally attached as a fulcrum to the slide means on the front side from the fulcrum of the support pole, and the other end is slidably attached to the support pole, and expands and contracts as the lift portion moves. A telescopic device for rotating the lift part in accordance with a change in the sliding position of the support pole;
A stopper that restrains expansion and contraction of the expansion and contraction device when the lift portion is at the position of the slide means;
The rear projection apparatus according to claim 1, further comprising:   The rear projection apparatus according to claim 1, further comprising: a lock unit that couples the casing and the screen unit to each other and releases the coupling. The locking means is
A lock mechanism provided on the back side of the screen unit;
No locking force is generated when engaged with the lock mechanism portion provided in the housing, and the locking mechanism generates a pressing force when the engagement with the lock mechanism portion is released. Part;
An operation unit that is provided on a side surface of the screen unit and that engages and disengages the lock mechanism and the locking unit;
5. The rear projection apparatus according to claim 4, further comprising: The locking means is
A locking portion provided in the housing and having a pressing force in a rear side direction of the screen unit;
When the pressing force applied to the front surface of the screen unit is not less than a predetermined value, the engagement with the locking portion is released, and when the pressing force is not more than a predetermined value, the engagement with the locking portion is released. A locking mechanism for maintaining the alignment;
5. The rear projection apparatus according to claim 4, further comprising:

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