JP2002214709A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make portability of a projector compatible with the acoustic property of the projector when used. SOLUTION: A projection lens 2 is exposed on the front surface of a nearly box shaped projector body 1, and a speaker 4 is incorporated in a front cover 3 opening/closing the front surface of the lens 2. When the cover 3 is moved from a housing position where it covers over the front surface of the lens 2 to the upper part of the projector body 1 so as to open the front surface of the lens 2, the speaker 4 is projected on the upper part of the projector body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a projector most suitable for application to, for example, a portable type liquid crystal projector.

[0002]

2. Description of the Related Art One of the important factors for a portable liquid crystal projector is that it is small and excellent in portability.
One. For this reason, when not in use, such as when carrying,
It is necessary to minimize the unevenness of the outer surface so that it can be easily stored in a bag or the like. In a conventional liquid crystal projector, an input video signal is projected on a screen or the like, and an audio signal is output as sound by a speaker built in the liquid crystal projector main body. The location of the viewer who views the video and audio output from the liquid crystal projector at a meeting or the like is arbitrary as long as the video on the screen can be viewed, so that the audio output of the liquid crystal projector is uniform from any direction. It is desired to be arranged at an upper position in the main body.

[0003]

However, when the speaker is built in an upper position in the main body of the liquid crystal projector, an extra space for mounting the speaker in the upper part of the main body is required. As a result, there is a problem that the size of the liquid crystal projector, particularly the height (thickness) of the main body increases, and the portability deteriorates. On the other hand, if the speaker is built into the main body of the liquid crystal projector and arranged, for example, on the side, the height (thickness) of the liquid crystal projector does not increase, but the sound effect (particularly the spread of sound) is problematic depending on where the sound is heard. Become. Therefore, in order to improve the acoustic effect, it is conceivable that the speaker is projected outside the main body of the liquid crystal projector and arranged at a predetermined place. However, in such a case, the outer surface of the liquid crystal projector may be arranged. There is a problem that the liquid crystal projector becomes less portable due to unevenness.

The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a projector capable of achieving both portability of the projector and acousticity during use of the projector. The purpose is.

[0005]

In order to achieve the above object, a projector according to the present invention exposes a projection lens on the front of a substantially box-shaped projector body, and a speaker is provided on a front cover for opening and closing the front of the projection lens. The front cover is moved from the storage position covering the front surface of the projection lens to the top of the projector body, and the front surface of the projection lens is moved to the open position where the projection lens is opened, so that the speaker projects to the top of the projector body. It is configured as follows.

In the projector of the present invention configured as described above, the speaker can be housed in the projector when not in use, such as when being carried, so that the outer surface of the entire projector can be made uneven. By opening the front surface of the lens, the speaker can be projected above the projector.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a portable type liquid crystal projector to which the present invention is applied will be described below in the following order. (1) Description of opening / closing mechanism of front cover also used as control panel and incorporating speaker (FIGS. 1 to 11) (1-1) Description of double hinge mechanism (FIGS. 1 to 7) (1-2) Description of the wiring structure of electric wires to the speaker (FIGS. 8 and 9) (1-3) Description of locking / unlocking means of front cover (FIGS. 9 to 11) (1-4) Description of opening / closing operation of front cover (FIGS. 1 to 1
1) (2) Description of a connector cover that opens and closes the connector housing (FIGS. 12 to 19) (3) Description of a support structure for a power supply terminal and a power supply board (FIGS. 20 to 25) (4) Focus of projection lens, Description of operation knobs such as zoom (FIGS. 26 to 32) (5) Description of light shielding plate in power supply heat radiation exhaust device (FIGS. 33 to 38)

(1) Also used as a control panel,
Description of Opening / Closing Mechanism of Front Cover with Built-in Speaker First, as shown in FIGS. 1 to 12, this portable type liquid crystal projector is formed in a flat design with no irregularities on the outer surface and has a flat box shape. The projection lens 2 is exposed at a position offset to one side on the front surface 1a of the liquid crystal projector main body 1 configured in a mold. Further, a front cover 3 for opening and closing the front surface of the projection lens 2 is provided. The front cover 3 is also used as a control panel, and a pair of left and right speakers 4 is built in both left and right inner positions. The front ends 1c of the left and right side portions 1b of the liquid crystal projector main body 1 project forward in a parallel manner, and a recess 5 is formed on the front side of the front surface 1a. In addition, an inner surface opposite to the outer surface 3a of the front cover 3 is formed on the control panel surface 3b,
A plurality of operation buttons 6 such as a power button, an input switching button, an image quality adjustment and menu button, a menu selection and adjustment button, an adjustment end button, and a reset button are arranged in the center of the control panel surface 3b. Further, a pair of left and right sound emitting portions 7 each having a large number of sound emitting holes are disposed at both left and right positions of the control panel surface 3b. It is located inside.

The front cover 3 is vertically rotatably supported by the liquid crystal projector main body 1 by a pair of left and right double hinge mechanisms 11 and 12, which will be described later. As shown in FIG. A storage position vertically accommodated in the recess 5 of the liquid crystal projector main body 1 to cover the front surface of the projection lens 2, and as shown in FIG. And a pair of left and right speakers 4 is configured to be rotatable in the directions of arrows a and b in the vertical and forward and backward directions within an angle range of 270 ° or more between an open position where the pair of left and right speakers 4 is directed obliquely rearward and upward. Then, the front cover 3 is vertically housed in the recess 5 of the liquid crystal projector main body 1, and the projection lens 2
By covering the front surface of the liquid crystal projector, the entire five surfaces except the bottom surface of the liquid crystal projector have a flat and neat design.

(1-1) Description of Double Hinge Mechanism Next, as shown in FIGS. 1 to 7, the upper ends of the left and right ends 3 c of the front cover 3 (the front cover 3 is vertically inserted into the recess 5). A pair of left and right double hinge mechanisms 11 and 12 are connected between the upper end 1d of the liquid crystal projector main body 1 and the left and right sides of the front end 1e of the upper portion 1d of the liquid crystal projector main body 1. The pair of left and right double hinge mechanisms 11 and 12 have first and second hinge pins 13, 14 and 15 and 16, respectively, and hinge arms 17 and 18 which are parallel to each other. Then, the pair of left and right double hinge mechanisms 11,
Reference numeral 12 denotes left and right side portions 1b of the liquid crystal projector main body 1, which are housed in a pair of left and right recesses 19 formed at the upper end portion of the front end portion 1c. A pair of left and right hinge pins 13, 1 of the pair of left and right double hinge mechanisms 11, 12 are provided.
4 and 15 and 16 are arranged on two parallel rotation center lines.

As shown in FIGS. 5 and 6, one ends 13a and 14a of the inner ends of the parallel first and second hinge pins 13 and 14 of one double hinge mechanism 11 are attached to brackets 20 and 21, respectively. The first and second hinge pins 1 and 2 are fixed by fixing the brackets 20 and 21 to the inside of the front cover 3 and the inside of the upper portion 1d of the liquid crystal projector body 1 with screws 22 and 23.
Reference numerals 3 and 14 are fixed to the front cover 3 and the liquid crystal projector body 1, respectively. And the hinge arm 17
The other ends 13b, 14b of the first and second hinge pins 13, 14 are connected at right angles between the other ends 13b, 14b, which are the outer ends of the first and second hinge pins 13, 14.
Are rotatably supported by the hinge arms 17, respectively.

[0012] First and second torsion coil springs 24 and 25 as first and second rotation urging means are inserted around the outer periphery of the first and second hinge pins 13 and 14, respectively. End portions 24 of the second torsion coil springs 24, 25
a, 24b and 25a, 25b are brackets 20, 21
And the hinge arm 17. Then, the front cover 3 is rotationally urged by the first torsion coil spring 24 around the first hinge pin 13 with respect to the hinge arm 17 in the direction of the arrow c, which is the upper side, and the second torsion coil spring 25. , The hinge arm 17 is connected to the liquid crystal projector main body 1 by the second hinge pin 1.
4 is urged to rotate in the direction of arrow e which is the upper rear side.

When a front cover 3 to be described later is opened, a first rotation mode in which the front cover 3 is first rotated in the direction of arrow c around the center of the first hinge pin 13 is executed. In order to execute a second rotation mode in which the second hinge pin 14 is rotated in the direction of the arrow e around the center, a pair of first and second hinge pins 13 and 14 for providing a difference in the rotational load on the hinge arm 17 is provided. The dampers 26, 27 are the first and second hinge pins 13,
14 is housed in the hinge arm 17 at the outer periphery. These dampers 26 and 27 are made of cylindrical rubber or the like having a slit formed in a part of the outer periphery.

The one double hinge mechanism 11 restricts the rotation angle (rotation angle) of the front cover 3 with respect to the hinge arm 17 in the direction of arrow c to approximately 270 °, and the hinge arm 17 with respect to the liquid crystal projector main body 1. Arrow e
Rotation angle restricting means 28, 29 for restricting the rotation angle (rotation angle) of the direction to approximately 90 ° are provided.
Stopper pins 30 and 31 projecting at right angles to a part of the outer periphery of 14, and stopper pin contact portions 32 and 33 formed integrally with the hinge arm 17. A two-piece cover 34, 35 made of plastic or the like is fixed to the outer periphery of the hinge arm 17 by screws or the like, and a cap 36 made of plastic or the like is provided on the outer circumference of the two-piece cover 34, 35. Are fitted and the first and second hinge pins 13 and 14 and the hinge arm 1
7 is covered.

Next, in the other double hinge mechanism 12, first and second parallel hinge pins 15 and 16 and a hinge arm 18 for connecting them at right angles are integrally formed of plastic or the like. The first and second hinge pins 15 and 16 are formed in a hollow pin shape, and the hinge arm 18 is also formed in a hollow shape. The first and second hinge pins 15 and 16 are connected to the front cover 3.
And the liquid crystal projector main body 1. A cap 37 made of plastic or the like is fitted to the outside of the hinge arm 18. Therefore, these first and second hinge pins 1
A substantially U-shaped hollow portion 38 is formed in the inside of the hinge arms 5, 16 and the hinge arm 18. However, the first and second hinge pins 15 and 16 and the hinge arm 18 are formed in a two-piece structure, and the hollow part 38 is formed by combining the two pieces and fixing them with screws. Become.

(1-2) Description of Wiring Structure of Electric Wire to Speaker Next, as shown in FIGS. 8 and 9, a plurality of operation buttons of the above-described control panel are provided at a substantially central portion in the front cover 3. A control board 41, which is a printed wiring board on which a plurality of control switches operated by 6 are mounted, is built in. An electric wire 42 serving as a harness for electrically connecting the control board 41 to a main circuit board (not shown) in the liquid crystal projector main body 1 is connected to the first and second hinge pins of the other double hinge mechanism 12. Wires are inserted and wired in a substantially U-shape in a hollow portion 38 formed in a substantially U-shape along the insides of the hinges 15 and 16 and the hinge arm 17. The left and right ends of the control board 41 and the pair of left and right speakers 4 are electrically connected by two electric wires 43 and 44, and the two electric wires 43 and 44 have the same length. The pair of left and right speakers 4 and electric wires 43 and 4
The cost reduction is achieved by the common use of No. 4.

(1-3) Description of Locking / Unlocking Means of Front Cover Next, as shown in FIGS. 9 to 11, in this liquid crystal projector, the front cover 3 is provided in the recess 45 of the liquid crystal projector main body 1. A mechanism is provided that automatically locks the front cover 3 when it is stored in a substantially vertical shape and can release the lock by pressing a lock release button. At this time, the front 1 of the liquid crystal projector body 1
arrow g, in which the lock / unlock hook portion 51 is in the left-right direction on one of the pair of left and right opposing surfaces 5a, 5b facing each other from the left and right sides in the recess 5 of FIG. The hook portion 51 is slidably projected in the h direction, and the hook portion 51 is interlocked with the unlocking push button 25 mounted on the front surface of the one side portion 1b of the liquid crystal projector main body 1. That is, the hook portion 51 is slid in the locking direction g by the locking spring (not shown) to the locking position shown by the solid line in FIG.
By pressing 2, the hook portion 51 is slid in the direction of the arrow h which is the unlocking direction against the locking spring to the unlocking position shown by the dashed line in FIG. 11 via an interlocking mechanism (not shown). It is configured to be able to.

On the other facing surface 5b of the recess 5 of the liquid crystal projector main body 1, a hook portion 53 having a two-row shape or a one-row shape is formed, and both left and right end surfaces 3c, 3d of the front cover 3 are formed. Are formed with a pair of left and right engaging portions 54 and 55 which are concave portions with which a pair of left and right hook portions 51 and 53 of the liquid crystal projector body 1 can be engaged and disengaged. In addition,
An inclined surface 51a is formed on the upper surface of the tip of one hook portion 51, and an inclined surface 53a is formed on the lower portion of the other hook portion 53, particularly. Also, slopes 54a, 55a are formed on the lower part of the outer circumference of the pair of left and right engagement parts 54, 55, in particular. A slight gap 56 is formed between the left and right end surfaces 3d of the front cover 3 and the pair of left and right facing surfaces 5a and 5b of the liquid crystal projector body 1.

(1-4) Explanation of Opening / Closing Operation of Front Cover Next, the opening / closing operation of the front cover 3 will be described with reference to FIGS. 1 to 11. First, FIGS. 1 (A), 4 and 5 will be described. The front cover 3 is stored substantially vertically at the storage position in the recess 5 of the liquid crystal projector main body 1 so that the projection lens 2
Shows the state of covering the front of, at this time,
As shown in FIG. 11, a pair of left and right hooks 51 and 53 of the liquid crystal projector main body 1 is engaged with a pair of left and right engagement portions 54 and 55 of the front cover 3, and the front cover 3 is Locked in storage position. When the front cover 3 is stored, the entire five surfaces except the bottom surface of the liquid crystal projector are formed flat, and the liquid crystal projector is reduced in size and has high portability. The liquid crystal projector is configured to be easily carried in a bag or the like, for example.

Next, when the front cover 3 is to be opened to the upper part of the liquid crystal projector main body 1, the lock release push button 52 shown in FIG. 11 is depressed, and the lock / unlock hook portion 5a is turned into a solid line in FIG. The slide drive is performed in the direction of arrow h from the lock position to the lock release position indicated by the dashed line. Then, the lock at the storage position of the front cover 3 is released, and the front cover 3 is automatically moved in the direction of arrow a shown in FIG. 2 to the open position shown in FIG. 1C, FIG. 2 and FIG. It is turned.

At this time, a pair of left and right hinge arms 17 and 18 are moved in a pair of right and left recesses 19 by the rotational load of the damper 27 on the outer periphery of the second hinge pin 14 of one double hinge mechanism 11 in FIG. In a state where the first hinge pin 13 is held in a horizontal state as shown in FIG.
A pair of left and right double hinge mechanisms 11 move from the storage position in the recess 5 to the halfway open position shown in FIG. 1B by the spring force charged in the first torsion coil spring 24 on the outer periphery of the front hinge 3. Left and right hinge arms 1 around the same center first hinge pins 13, 15
By rotating approximately 180 ° in the direction of arrow c with respect to 7 and 18,
The front cover 3 stands substantially vertically upward. At this time, the stopper pin 30 shown in FIG.
The stopper pin contact portion 32 of the hinge arm 17 abuts in the direction of arrow c, and the front cover 3
And the angle is restricted to approximately 90 ° to stop.

At the moment when the stopper pin contact portion 32 contacts the stopper pin 30 from the direction of arrow c, the second torsion coil spring 25 on the outer periphery of the second hinge pin 14
, A rotational force in the direction of arrow e centering on the second hinge pin 14 acts on the hinge arm 17. As a result, a pair of left and right hinge arms 17 of the pair of left and right double hinge mechanisms 11 and 12 are provided.
18, a pair of left and right second hinge pins 14 having the same center,
16 and is driven to rotate approximately 90 ° in the direction of arrow e.
The front cover 3 continues to automatically rotate in the direction of the arrow e from the halfway opening position shown in FIG. 1B to the upper opening position of the liquid crystal projector body 1 shown in FIGS. 1C, 2 and 4. Is done. Then, the stopper pin 3 shown in FIG.
1, the stopper pin contact portion 33 of the hinge arm 17 contacts the direction of arrow e, and the front cover 3 is stopped at the open position.

When the front cover 3 is rotated in the direction of arrow e to the open position at the top of the liquid crystal projector body 1, a pair of left and right double hinge mechanisms 11, 12 is provided.
A pair of left and right hinge arms 17 and 18
And a pair of left and right first hinge pins 13 and 15 supporting the front cover 3 are located above the hinge pins 14 and 16 of the liquid crystal projector main body 1.
By being raised higher than d,
The control panel surface 3 b and the pair of left and right speakers 4, which are turned upside down, are directed obliquely rearward and upward of the liquid crystal projector main body 1.

FIG. 1C, FIG. 2 and FIG.
The open state of the front cover 3 shown in FIG. 1 is a use state of a liquid crystal projector in which the front surface of the projection lens 2 is opened and an image can be projected on a screen or the like by the projection lens 2. In this use state of the liquid crystal projector, A person or a crowd operating the rear surface 1f of the liquid crystal projector body 1
When the control panel surface 3b of the front cover 3 and the pair of left and right speakers 4 face diagonally rearward and upward of the liquid crystal projector main body 1, a plurality of operation buttons on the control panel surface 3b for the operator. 6 is significantly improved, and the sound generated from the pair of left and right speakers 4 is mainly directed obliquely rearward and upward of the liquid crystal projector. It is easier to hear and the sound effect is significantly improved.

In order to return the front cover 3 from the open position to the storage position, it is necessary to push the front cover 3 in the direction of arrow b in FIG. The hinge arms 17, 18 of the pair of double hinge mechanisms 11, 12 are integrated with the front cover 3 to form a pair of left and right second hinges.
7, the second torsion coil spring 25 is charged with the spring force. Subsequently, the front cover 3 is rotated about the pair of left and right hinge arms 17 and 18 about the pair of left and right first hinge pins 13 and 15 in the direction of arrow d in FIG. The coil spring 24 is charged with a spring force.

Then, as shown in FIG. 11, when the front cover 3 is returned to the storage position in the recess 5 and stored therein, and when the front surface of the projection lens 2 is covered by the front cover 3, a pair of left and right A pair of left and right engaging portions 54 and 55 are attached to the hook portions 51 and 53 against the spring force of the lock spring of the hook portion 51, and these slopes 51a, 53a, 54a and 55
As a result, the front cover 3 is automatically engaged in the storage position by being automatically engaged by the guiding action of a.

(2) Description of Connector Cover for Opening / Closing Connector Housing Next, as shown in FIGS. 12 to 19, the rear surface 1f of one side 1b of the outer casing portion 1g of the liquid crystal projector main body 1.
A concave connector accommodating portion 61 accommodating a plurality of connectors is formed in the side corner portion. And
The connector accommodating portion 61 has connectors for connecting to a personal computer, etc., which are more frequently used than the main connector 62 and the video input terminal connector, the S input terminal connector, etc. A plurality of low secondary connectors 63, 64 are accommodated.

Therefore, the inside of the connector accommodating portion 61 is divided into a main connector portion 61a and a sub-connector portion 61b in the front-rear direction of the liquid crystal projector main body 1 and the like, and the main connector 62 is disposed in the main connector portion 61a. A plurality of sub-connectors 63 and 64 are arranged in the sub-connector part 61b.

A connector cover 65 capable of opening and closing the entire connector housing portion 61 is provided. The main cover 66 and the sub-cover 67 are integrally formed between the main cover 66 and the sub-cover 67, and the main cover 66 and the sub-cover 67 are mutually rotated by the hinge 68. It is movably integrated. The sub cover 67 of the connector cover 65
In the free end portion 65a, which is the side end portion, two or three mounting portions 69 are provided at two or three places above and below the inner surface 67a of the sub-cover portion 67.
Are formed integrally at right angles. A distal end portion 65 which is an end portion of the connector cover 65 on the main cover portion 66 side.
A knob 70 is integrally formed at the upper and lower central portions on the outside of b. In addition, the two or three mounting portions 69 are provided with a large diameter portion 6 at the tip.
9a is formed in a cylindrical pin shape integrally formed.

The connector cover 65 is preferably formed of a soft member such as a soft plastic such as rubber or elastomer. The connector cover 65 may be formed by laminating a hard plastic or a metal foil for makeup on the surface of the connector cover 65. good. Alternatively, the main cover portion 66 and the sub-cover portion 67 may be separately formed of hard plastic, and these may be mechanically coupled to each other by a hinge portion 68 so as to be freely rotatable.

The connector cover 65 is fitted into the connector accommodating portion 61 from the outside, and two or three mounting portions 69 are attached to the main connector portion 6b of the sub connector portion 61b.
The upper and lower mounting holes 71 formed in the outer housing 1g on the side opposite to the side 1a are press-fitted against the elasticity and mounted. 71
The inside is prevented from falling out.

The three outer peripheral surfaces 65c of the connector cover 65 except for the plurality of mounting portions 69 are lightly press-fitted inside the opposing inner peripheral surfaces 61c of the connector housing portion 61 against the elasticity. Thus, the first locking portion 72 is configured by these. Also, this connector cover 6
The sub-connector 63 is provided on the inner surface 67a of the sub-cover portion 67 of FIG.
A substantially cylindrical inner press-fit portion 73 that is lightly press-fitted against elasticity is integrally formed inside one of the above, and the press-fit portion 73 constitutes a second locking portion 74. .

According to the connector accommodating portion 61 and the connector cover 65 configured as described above, the connector cover 65 is provided on the outer casing 1g of the liquid crystal projector main body 1 with a plurality of mounting portions 69 as fulcrums, and the knob 70 side is indicated by an arrow i. j
It is attached so that it can rotate freely (open and close). 12, 15, and 17, when the entire connector cover 65 is lightly press-fitted into the connector accommodating portion 61 against the elasticity, the press-fitting portion 73 is also lightly press-fitted into the sub-connector 63. The entire inside of the connector housing 61 is sealed by the connector cover 65. At this time, the main cover portion 66 of the connector cover 65 is the first cover portion having a weak locking force.
Is locked by a weak locking force, and the sub-cover portion 67 is locked by a strong locking force due to the resultant force of the locking portion 72 and the second locking portion 74.

Therefore, as shown in FIGS. 13 and 14,
When a connector (signal cable) for connection to a personal computer or the like is inserted into the frequently used main connector 62, as shown in FIGS. 13 and 18, the knob 70 of the connector cover 65 is pointed outward by an arrow j. When pulled in the direction, only the main cover portion 66 locked by the weak locking force of only the first locking portion 72 is disengaged from the main connector portion 61a of the connector housing portion 61, and the main cover portion 66 is hinged. The main connector portion 61a is independently opened independently in the direction of arrow j with the portion 68 as the center.

However, the sub-cover portion 67 of the connector cover 65 is locked in the connector accommodating portion 61 by a strong locking force generated by the combined force of the first locking portion 72 and the second locking portion 74. The sub cover 67 can keep the hermetically sealed state of the sub connector portion 61b of the connector accommodating portion 61 as it is. Therefore, while the connection connector is connected to the main connector 62 and used, the dustproofness of the sub-connectors 63 and 64 can be ensured.

When the knob 70 of the connector cover 65 is strongly pulled in the direction of arrow j in FIG. 18, the first and second locking portions 72 and 74 are both released, so that as shown in FIGS. Since the main cover 66 and the sub cover 67 of the connector cover 65 are simultaneously opened via the hinge 68, the entire connector housing 61 can be opened (fully opened). And the main connector 62
The connection connector (signal cable) to the two or three sub-connectors 63 and 64 can be freely connected.

As described above, the main cover part 66 of one connector cover 65 that opens and closes the frequently used main connector part 61a and the less frequently used sub-connector part 61b in the connector housing part 61 is replaced with the sub-cover part 67. If the main cover 66 and the sub-cover 67 can be opened and closed independently of each other, a liquid crystal projector with high dust resistance can be obtained, and the usability is very good. . Since only one connector cover 65 is required, the number of parts and the number of assembling steps can be reduced as compared with the case where the connector cover 65 is divided into two parts. Can be planned. Further, when one connector cover 65 is attached as compared with the case where two connector covers are individually attached, only one installation space is required, so that the size and weight of the liquid crystal projector can be reduced. it can. Here, a structure is shown in which the main connector portion 61a and the sub-connector portion 61b of the connector housing portion 61 and the main cover portion 66 and the sub-cover portion 67 of the connector cover 65 are divided into two in the front-rear direction of the liquid crystal projector main body 1. It is also possible to divide these into two parts in the vertical and horizontal directions of the liquid crystal projector body 1.

(3) Description of Support Structure for Power Terminal and Power Board Next, as shown in the schematic diagram of FIG. 20, a part of the front surface 1a of the liquid crystal projector main body 1 of the liquid crystal projector is an example of a connector. A certain power supply terminal 81 is exposed, and this power supply terminal 81 is soldered to a power supply board 82 which is a printed wiring board horizontally mounted in the liquid crystal projector main body 1. And the power supply terminal 81
Are thick, and the A
Since the frictional force at the time of attaching and detaching the power supply connector, which is the C inlet, is large, there is a problem that the soldering portion between the power supply terminal 81 and the power supply board 82 is easily stressed and damaged at the time of attachment and detachment. Therefore, in this liquid crystal projector, as shown in FIGS. 21 to 25, a support structure of a power supply terminal 81 and a power supply board 82 for preventing breakage due to the stress applied to the soldered portion is employed.

That is, first, the housing 8 of the power supply terminal 81
The two connecting pins 85 each have a split-pin shape integrally formed on the upper surface of the housing 83 and closely adhered to the lower surface of a horizontal power supply board 82, and a flange portion is formed at the tip. Are fitted into two insertion holes 86 formed in the power supply board 82 at right angles from below, and the housing 83 is coupled to the power supply board 82. On this occasion,
Ends 84a for soldering the two terminal pins 84 of the power supply terminal 81 to the power supply board 82 are inserted at right angles into the power supply board 82, and are respectively soldered 87 to predetermined wiring patterns.

Next, the outer casing 1 of the liquid crystal projector body 1
A connector holding portion 90 is firmly connected to an upper portion of the chassis such as the bottom case 89 by a fixing method using screws 91 or by integral molding. A substantially U-shaped connector fitting portion 92 for detachably fitting the power supply terminal 81 from above and holding the power supply terminal 81 horizontally is integrally formed at the upper end of the connector holding portion 90. A pair of right and left vertical ribs 93 and a rib fitting groove 94 are integrally formed between the left and right side surfaces 83a of the housing 83 and the left and right inner surfaces 92a of the connector fitting portion 92, respectively. I have. At this time, the rib 93 and the rib fitting groove 94
May be provided on either side of the housing 83 and the connector fitting portion 92.

At a position behind the connector holding section 90, a power supply board holding section 95, which is a printed wiring board holding section, is attached to an upper portion of the bottom case 89 and other members. The power supply board holding portion 95 is constituted by a lower supporting member 96 and an upper pressing member 97,
The plurality of locking holes 99 of the upper pressing member 97 are engaged with the plurality of vertical locking claws 98 integrally formed on the upper end of the lower support member 96 with play in up, down, left, right, front and back. Have been.

Therefore, as shown in FIGS. 22 and 23,
The housing 83 of the power supply terminal 81 is connected to the connector holding section 90.
Are inserted horizontally from above into the connector fitting portion 92, and are horizontally placed.
And are fitted to each other. Then, the housing 83 is connected to the terminal pins 84 with respect to the bottom case 89 as a chassis.
Power terminal 8
The front end of the connector 1 is opposed to the connector hole 100 formed in the front surface 1a of the liquid crystal projector main body 1 from the inside.

Therefore, as shown in FIGS. 22 to 25, the left and right end portions 82a of the power supply board 82 are horizontally placed on the upper part of the lower support member 96 of the power supply board holding portion 95, and the upper holding member 97 is When the power supply board 82 is fitted to the board 82 with play from above and the plurality of engaging holes 99 are fitted to the plurality of locking claws 98 in a state having play, the power supply board 82 The terminal pins 85 are slidably supported in the axial direction. Then, finally, the top cover 101 of the liquid crystal projector main body 1 is coupled to the upper portion of the bottom case 89 by screws, and the top cover 101 gently presses the plurality of convex portions 97a on the upper holding member 97 from above. The power supply board 82 is prevented from floating, and the assembly of the power supply terminal 81 into the liquid crystal projector main body 1 is completed.

Thus, the housing 8 of the power supply terminal 81
3 is fixed to a connector holding portion 90 integral with a bottom case 89 as a chassis in the direction of arrow k which is the axial direction of the terminal pins 84, while the two terminal pins 84 of the power supply terminal 81 are soldered 87. When the power supply board 82 is slidably supported on the power supply board holding portion 85 in the direction of arrow k which is the axial direction of the terminal pin 84, the power supply connection connector 102 as an AC inlet is connected to the connector hole 100 of the liquid crystal projector body 1. The housing 83 of the power supply terminal 81 is not pushed or pulled in the direction of the arrow k due to the frictional force when the housing 83 of the power supply terminal 81 is inserted into or removed from the housing 83 through the power supply terminal 81. Even if the housing 83 is slightly pushed or pulled in the direction of arrow k, the power supply board 82 can slide freely in the direction of arrow k integrally with the housing 83 via the two coupling pins 85. Terminal pin 84
It is possible to prevent stress from being applied to the portion of the soldering 87 to the power supply board 82, which may be damaged beforehand.

Then, the housing 83 of the power supply terminal 81 is removably fitted into the connector fitting portion 92 of the connector holding portion 90 from above while being fitted to each other by the rib 93 and the rib fitting groove 94. The structure in which the housing 83 is mounted horizontally does not require any screwing of the housing 83 to the connector holding portion 90, and can greatly improve the workability during assembly and disassembly. And the power supply terminal 8
Since there is no need to screw the first and power supply boards 82 to the chassis or the like, the mounting space can be minimized, and the size and weight of the liquid crystal projector can be reduced.

(4) Description of Operation Knobs for Focusing, Zooming, etc. of Projection Lens First, FIG. 32 shows a focus adjustment knob 1 of a projection lens 142 employed in a liquid crystal projector body 141 of a conventional portable type liquid crystal projector.
FIG. 32A and FIG. 32B show the liquid crystal projector main body 1 and a knob 43 for zoom adjustment.
A hole 145 or a notch 146 is formed on the upper surface of the focus adjustment knob 41, and the focus adjustment knob 14 is provided in the hole 145 or the notch 146.
3 and a knob 144 for zoom adjustment.
FIG. 32C shows a configuration in which a plurality of slits 147 are formed on the upper surface of the liquid crystal projector main body 141, and the focus adjustment knob 133 and the zoom adjustment knob 144 are projected upward from these slits 147. FIG. 32D shows the projection lens 142 protruding greatly from the front surface of the liquid crystal projector main body 141 to the front. Conventionally, in addition to the above, the projection lens 1
47 can be configured as a retractable type (a structure that can be inserted into and taken out of the liquid crystal projector body 141),
There were methods such as employing a zoom.

However, in the conventional method as described above, the flat design cannot be adopted because the outer surface of the liquid crystal projector has irregularities, or the flat design is extremely costly. However, there is a problem that the size is increased. In addition, there were some that made it difficult to use a control panel that also functions as the front cover.

Therefore, in the liquid crystal projector of the present invention, as shown in FIGS. 26 to 28, the front end 2a of the projection lens 2 exposed on the front face 1a of the liquid crystal projector main body 1 is stepped from the front face 1a of the liquid crystal projector main body 1. H
It is retracted (recessed) by one backward. Then, an arc-shaped concave portion 111 is formed on the outer peripheral portion of the projection lens 2 on the front surface 1a of the liquid crystal projector main body 1. Then, a focus adjustment knob 113 which is an operation knob is fixed to an outer periphery of a focus adjustment ring 112 arranged on an outer periphery of a front end of the projection lens 2 with a screw 114, and a focus adjustment ring is formed on the outer periphery of the projection lens 2 by a screw 114. A zoom adjustment knob 116, which is an operation knob, is fixed to the outer periphery of the front end of a zoom adjustment ring 115 disposed at a position rearward of 112 with screws 117.

The focus adjustment knob 1
13 and a zoom adjustment knob 116 housed in an arc-shaped recess 111 on the outer periphery of the projection lens 2 on the front surface 1a of the liquid crystal projector main body 1. Each of the focus adjustment knob 113 and the zoom adjustment knob 116 has a convex cross-sectional shape, and ribs 113b and 116b are integrally formed at the center of the front surface of the plate-shaped knob main bodies 113a and 116a. ing. A knurl 118 having a high frictional shape for preventing slip is formed on the front surfaces of the ribs 113b and 116b. Then, these knob main bodies 113a and 116
The deepest part a has steps H2 and H3 on the rear side with respect to the front end 2a of the projection lens 2, respectively.

With this configuration, the finger is inserted into the recess 111 to make the focus adjustment knob convex, although the unevenness of the front surface 1a of the liquid crystal projector body 1 can be eliminated. 26, the focus adjustment ring 112 and the zoom adjustment ring 115 can be accurately rotated and adjusted in the same direction by easily rotating the 113 and the zoom adjustment knob 116 in the directions of arrows m and n in FIG. At this time, the center ribs 113b, 116b
Can be prevented from slipping by the knurl 118 of the finger, and the fingers are inadvertently projected by the steps H2 and H3 of the knob bodies 113a and 116a with respect to the projection lens 2.
Can be prevented from slipping on the lens surface 2b of the lens unit 2 and soiling the lens surface 2b.

At this time, as shown in FIG. 29A, a recess 119 is formed on the front surface of the focus adjustment knob 113 and the zoom adjustment knob 116, or as shown in FIG. , These focus adjustment knobs 1
13 and center rib 113 of zoom adjustment knob 116
b, 116b, these knobs 113, 11
A knurl 118 having a high frictional shape is formed on the entire front surface of the knob 6, and as shown in FIG. 29C, a non-slip member 120 such as rubber as a high friction member is provided on the front surface of these knobs 113 and 116. Can be pasted. Also,
As shown in FIG. 30, the diameter D of the concave portion 111 on the front surface 1a of the liquid crystal projector main body 1 may be increased to form the focus adjustment knob 113 and the zoom adjustment knob 116 in a long lever shape. it can.

Further, as shown in FIG. 31, on the front surface 1a of the liquid crystal projector main body 1, an elastic seal member 121 such as rubber is attached to the outer peripheral portion of the recess 111 (the same as the outer peripheral portion of the projection lens 2). The front 1 as described above for the cover 3
When the projection lens 2 is stored in the front storage position and locked, the front cover 3 can be pressed against the elastic seal member 121 to improve the dustproofness of the projection lens 2.

(5) Description of Light Shielding Plate in Radiation Exhaust Device for Power Supply Next, as shown in the schematic diagram of FIG. 33 and FIG.
The light source unit 125, the optical unit 126, and the projection lens 2 are disposed so as to be bent substantially in a U-shape,
As described above, the projection lens 2 is exposed on the front surface 1a of the liquid crystal projector main body 1. Then, the light source unit 125
Is disposed on the front side of the optical unit 126, and a light source 129 including a discharge lamp 127 and a cylindrical reflector 128 is disposed in the light source section 125 toward the rear. An exhaust fan 130 is disposed on the optical axis of the light source 129 between the light source 129 and the front surface 1a of the liquid crystal projector main body 1 and is disposed in the outer casing 1g of the liquid crystal projector main body 1 in front of the exhaust fan 130 on the front surface 1a. Has an exhaust port 131 formed therein. During the projection of the image, the exhaust fan 130 is operated to
9 is configured to be exhausted to the front outside of the liquid crystal projector main body 1 through the exhaust port 131.

However, during projection of an image, the light source 1
A part of the light L generated at 29 leaks to the front side, and the light L leaks to the front outside of the liquid crystal projector main body 1 through the exhaust fan 130 and the exhaust port 131, thereby hindering the projection of an image. Therefore, a light blocking plate 132 for blocking light L leaking forward from the light source 129 is disposed between the light source 129 and the exhaust fan 130 at right angles to the optical axis P of the light source 129. Then, the light shielding plate 132
Is formed by injection molding of heat-resistant plastic, and is integrally formed in a state in which a plurality of light shielding fins 133 inclined in one direction with respect to the optical axis P of the light source 129 are arranged in parallel at regular intervals. The light-shielding plate 132 is attached to the front end 125a of the light source 125 by a plug-in method, screwing, or the like.

According to the light shielding plate 132, heat generated by the light source 129 is sucked by the exhaust fan 130 through the plurality of light shielding fins 133 of the light shielding plate 132, and is exhausted to the front outside of the liquid crystal projector main body 1. , Light source 1
A plurality of light shielding fins 133 are used to prevent light L leaking forward from
It was developed for the purpose of blocking by.

However, as shown in FIG. 37, the conventional light shielding plate 132 has a shape in which a plurality of light shielding fins 133 inclined in one direction with respect to the optical axis P of the light source 129 are arranged in parallel at regular intervals. With respect to the light L leaking radially from the center O of the light source 129 due to the configuration, the light shielding fin 133 in the upper half in FIG. 37 can surely shield the light L, but the light shielding fin 133 in the lower half in FIG. The fin 133 cannot shield the light L, and the light L leaks to the exhaust fan 130 side between the plurality of light shielding fins 133.

Therefore, as shown in FIG. 38, by increasing the inclination angle of the plurality of light shielding fins 133 with respect to the optical axis P of the light source 129, the light shielding fin 133 in the lower half in FIG. Can be. However, if the inclination angle of the light shielding fin 133 is increased as described above, the light shielding plate 132 is brought into contact with the mold as shown by the arrow X direction in FIG. It can only be pulled out in a direction inclined at a large angle to the direction. As a result, the mold structure becomes very complicated, the mold becomes large, and the manufacturing cost increases. Further, since the aperture ratio of the light shielding plate 132 is reduced,
A problem arises in that the air resistance during the exhaustion of heat by the exhaust fan 130 increases and the exhaust efficiency decreases.

The liquid crystal projector according to the present invention is designed to solve this problem.
As shown in FIG. 5A, a plurality of light shielding fins 133 of the light shielding plate 132 are symmetrically inclined in the vertical and horizontal directions perpendicular to the optical axis P of the light source 129. With this configuration, even if the inclination angles of the plurality of light shielding fins 133 with respect to the optical axis P are reduced, the light source 12
9 are all opaque fins 13 whose inclination is symmetrical in the entire vertical and horizontal directions of the light L radially generated from the center O of the light 9.
3, light can be reliably shielded. If the inclination angles of the plurality of light shielding fins 133 with respect to the optical axis P are reduced in this manner, the direction in which the light shielding plate 132 is removed from the mold at the time of injection molding of the light shielding plate 132 by the mold is shown in FIG.
Can be set substantially in the same direction as the butting of the dies as indicated by the arrow Y, so that the dies structure can be simplified and the dies can be reduced in size, thereby significantly reducing the manufacturing cost. Can be planned. In addition, a plurality of shading fins 1
If the angle of inclination of 33 with respect to optical axis P is reduced, the aperture ratio of light-shielding plate 132 is increased, so that the air resistance during exhaustion of heat by exhaust fan 130 is reduced, and exhaust efficiency can be improved.

FIG. 35B shows a case where a plurality of light shielding fins 133 are formed in a concentric polygonal shape so as to be symmetrical in two or more directions perpendicular to the optical axis P. C) is a configuration in which a plurality of light shielding fins 133 are formed in a concentric circle shape. FIG. 36 shows two light-shielding plates 132 having the same shape, which are arranged in the optical axis P in the vertical and horizontal directions.
Are symmetrically arranged by inverting each other in the direction perpendicular to. Although the light shielding plate 132 is arranged on the optical axis P of the light source 129 in this embodiment, the same effect can be obtained when the light shielding plate 132 is arranged on the side of the optical axis P and the air is exhausted from the side.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical concept of the present invention.

[0061]

According to the projector of the present invention configured as described above, the speaker can be housed in the projector when not in use, such as when the portable device is used, so that the outer surface of the entire projector can be made uneven. By opening the front surface of the projection lens, the speaker can be made to protrude above the projector, so that the speaker is built into the projector body and a number of fine holes are opened in the outer surface of the projector body. The appearance is clear without deteriorating the appearance, dust-proofing and drip-proofing properties as in the case where the sound emitting portion is exposed. In addition, the sound effect at the time of projecting an image is also improved. In addition, by passing the wiring to the speaker through the hollow portion in the hinge, the wiring is not exposed to the outside, and the appearance is clear.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state of opening and closing a front cover of a liquid crystal projector to which the present invention is applied.

FIG. 2 is a side view showing opening and closing movements of a front cover of the liquid crystal projector.

FIG. 3 is a plan view, a front view, and a side view showing a stored state of a front cover of the same liquid crystal projector.

FIG. 4 is a plan view, a front view, and a side view showing an open state of a front cover of the liquid crystal projector.

FIG. 5 is a partially exploded perspective view showing one double hinge mechanism of the same liquid crystal projector.

FIG. 6 is a plan view illustrating a double hinge mechanism of the above.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a partially exploded perspective view showing an electric wire insertion state of the other double hinge mechanism of the above.

FIG. 9 is a perspective view illustrating wiring inside a front cover of the liquid crystal projector.

FIG. 10 is a perspective view illustrating a lock mechanism of a front cover of the liquid crystal projector.

FIG. 11 is a partially cutaway front view illustrating a lock / unlock mechanism of the front cover according to the embodiment.

FIG. 12 is a side view illustrating a connector cover of the liquid crystal projector.

FIG. 13 is a side view showing an open state of a part of the connector cover.

FIG. 14 is a side view showing a fully opened state of the connector cover.

FIG. 15 is an enlarged side view of the connector cover of FIG.

FIG. 16 is a rear view of the connector cover of FIG.

17 is a horizontal sectional plan view of FIG.

18 is a horizontal sectional plan view of a part of the connector cover in FIG. 17 in an open state.

FIG. 19 is a horizontal sectional plan view of the connector cover of FIG. 17 in a fully opened state.

FIG. 20 is a schematic diagram showing an arrangement of a power supply terminal and a power supply board of the above liquid crystal projector.

FIG. 21 is an exploded perspective view for explaining a power supply terminal support structure of the power supply terminal.

FIG. 22 is a vertical sectional side view for explaining a power supply terminal and a power supply board supporting structure of the power supply terminal.

23 is a sectional view taken along line BB of FIG. 22.

FIG. 24 is a vertical cross-sectional front view illustrating a power supply board supporting structure of the power supply board.

FIG. 25 is an enlarged sectional view of a main part of FIG. 24;

FIG. 26 is a front view illustrating an operation knob of the projection lens of the liquid crystal projector.

FIG. 27 is a sectional view taken along the line DD in FIG. 26;

FIG. 28 is a sectional view taken along line EE of FIG. 26;

FIG. 29 is a perspective view showing a modification of the operation knob of the above.

FIG. 30 is a front view showing a modification of the operation knob of the above.

FIG. 31 is a partially cutaway side view showing the sealing structure of the projection lens of the above.

FIG. 32 is a plan view showing a plurality of examples of operation knobs of a conventional projection lens.

FIG. 33 is a schematic diagram illustrating a light-shielding plate of the liquid crystal projector.

FIG. 34 is an enlarged cross-sectional side view of the above light-shielding plate.

FIG. 35 is a front view of a plurality of examples of the above light-shielding plate.

FIG. 36 is an enlarged cross-sectional side view showing a modified example of the above light shielding plate.

FIG. 37 is an enlarged sectional side view showing a conventional light shielding plate.

FIG. 38 is an enlarged sectional side view showing another example of the conventional light shielding plate.

[Explanation of symbols]

1 is a projector main body, 2 is a projection lens, 3 is a front cover, 4 is a speaker, 11 and 12 are double hinge mechanisms,
13, 15 are first hinge pins, 14, 16 are second hinge pins, 17, 18 are hinge arms, and 42 is an electric wire.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI theme coat ゛ (Reference) H04N 5/64 501 H04N 5/64 501D 5/74 5/74 E (72) Inventor Takuji Okubo Shinagawa, Tokyo 6-35 Kita-Shinagawa-ku, Sony Corporation (72) Inventor Yusuke Kanzaki 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 2H088 EA12 HA24 MA20 2H091 FA26X LA30 MA07 5C058 BA35 EA02

Claims (4)

[Claims] 1. A substantially box-shaped projector main body, a projection lens exposed on the front surface of the projector main body, a front cover for opening and closing the front surface of the projection lens, and a built-in front cover. A speaker that is moved from an accommodation position covering the front surface of the projection lens to an upper position of the projector main body and is moved to an open position where the front surface of the projection lens is opened, thereby protruding above the projector main body. A projector characterized in that: 2. The projector according to claim 1, wherein when the front cover is moved to an open position at an upper portion of the projector body, the speaker is directed obliquely rearward and upward. A hinge mechanism for rotating the front cover with respect to the projector body between the storage position and the open position, wherein the speaker is provided on an inner surface of the front cover for closing the projection lens. The front cover is rotated from the storage position to the open position by the hinge mechanism, and the inner surface of the front cover is directed upward or obliquely rearward and upward, so that the speaker is positioned above or obliquely above the projector main body. The projector according to claim 1, wherein the projector is configured to face rearward and upward. 4. A hollow hinge pin is provided in the hinge mechanism, and a power supply for connecting a circuit in the projector body to a speaker and / or a control panel board built in the front cover is provided to the hollow hinge pin. The projector according to claim 1, wherein the projector is inserted into the projector.