JP2750300B2 - LCD projector lens storage and extrusion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens housing / extrusion device for a liquid crystal projector, and more particularly, to a lens housing for a liquid crystal projector which is selectively housed in a completely housed position in a shell of the liquid crystal projector and used. The present invention relates to an accommodating / extruding device for a liquid crystal projector that extrudes to a completely extruded position to obtain.

[0002]

2. Description of the Related Art A conventional liquid crystal projector employs a structure in which a lens is fixedly exposed outside a shell of the liquid crystal projector.

[0003]

For this reason, in the conventional liquid crystal projector, the entire volume of the liquid crystal projector becomes large, not only occupying space, but also inconvenience of carrying and exposure of the lens due to exposure. There was a problem that it was easily damaged and damaged.

Accordingly, the present invention has been made to solve such problems of the prior art. When the liquid crystal projector is not used, the lens can be housed in the shell, and the liquid crystal projector can be used. When the user wants to use, the lens can be pushed out to the full pushing position where it can be used by simple operation, so that the liquid crystal projector is small and light, portable and convenient, and the optical path can be shortened, It is still another object of the present invention to provide a lens housing / extrusion device for a liquid crystal projector that protects a lens when not in use and avoids damage.

[0005]

In order to achieve the above object, the present invention is mounted on a shell of a liquid crystal projector having a top wall, and selectively accommodates a lens of the liquid crystal projector in a completely stored position inside the shell. In a lens housing / extrusion device for a liquid crystal projector that extrudes to a completely extruded position using a lens, the top is fixed to the top wall of the liquid crystal projector, has an opening, at least one elongated guide groove, and a fixed axis. A fixing member having:
A pivoting member pivotally attached to a fixed axis of the fixed member, the center of which is capable of swinging in a vertical plane through an opening of the fixed member, and holding the lens; At least one guide pin pivotally attached to the movable axis of the swing member, swingable in a vertical plane about the movable axis, and corresponding to the elongated guide groove of the fixed member, Each of the guide pins is inserted into the corresponding guide groove and moves in the guide groove, so that the lens holding member that guides the storing and pushing operation, and the lens holding member that is operated and selectively completes the lens holding member. Latch means for locking to the storage position or opening the lens holding member and pushing it out of the shell of the liquid crystal projector to be used, and being provided between the swinging member and the lens holding member; After paying and extrusion unit is opened method, a pressing means for pushing the lens holding member by an elastic force,
It is characterized by having.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments and examples of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are perspective views showing a liquid crystal projector to which a lens housing / extrusion device according to an embodiment of the present invention is attached. FIG. 1 shows a state in which the lens of the liquid crystal projector is completely placed in a pushed position (a usable state), while FIG. 2 shows a state in which the lens of the liquid crystal projector is completely housed in the shell of the liquid crystal projector. ing.

As shown in FIG. 1, a lens housing / extrusion device for a liquid crystal projector according to the present invention comprises a fixing member 1, a swinging member 2, a lens holding member 3, a latch means 4, a pressing spring 5, and the like. It is composed of members. The fixing member 1
The lens 6 of the liquid crystal projector is fixed to a shell 7 of the liquid crystal projector, and is held by the lens holding member 3. The latch means 4 is attached to the fixed member 1, and the pressing spring 5 is attached between the swing member 2 and the lens holding member 3. 3 shows a detailed structure of the fixing member, FIG. 4 shows a detailed structure of the swing member, and FIG. 5 shows a detailed structure of the lens holding member.

As shown in FIG. 3, the fixing member 1 has a top 11 having an opening 13 which is substantially rectangular,
And two parallel side portions 12 extending downward from the side. A guide groove 1C (see FIG. 7) having the same shape is formed on each of the side surfaces 12, and a pivot hole 1A is provided near a connecting portion between each side surface 12 and the top 11. Here, FIG. 7 shows an example of the shape of the guide groove 1C. As is apparent from FIG. 7, the guide groove 1C has a substantially arc shape, and its left end 1L and right end 1R are warped upward, and the middle portion is Hanging relatively low. A part F of the right end 1R is horizontally extended. Details of the guide groove 1C will be described later.

As shown in FIG. 4, the swing member 2 has a substantially U-shape, and the swing member 2 has a substantially rectangular intermediate portion 21.
And a pair of substantially fan-shaped side pieces 22 provided so as to be vertically continuous from both ends of the intermediate portion 21.
In the swing member 2, a columnar convex portion 2A corresponding to the pivot hole 1A of the fixing member 1 is provided near the center of the sector of each side piece portion 22, and the convex portion 2A and the pivot hole 1A are provided.
The fixed axis A (1A, 2B) is formed by the combination of the above. The swinging member 2 swings around the fixed axis A in the vertical plane through the opening 13 of the fixed member 1, thereby enabling the projector to enter and exit the shell (FIGS. 3 to 3). 6). Further, a pivot hole 2B is provided in the vicinity of the fan-shaped edge portion adjacent to the intermediate portion 21 of each side piece portion 22.

As shown in FIG. 5, on both sides (FIG. 5 shows only one side) of the lens holding member 3 for holding the lens 6, cylindrical columns corresponding to the pivot holes 2B of the swinging member 2 are provided. Guide pins 3C corresponding to the convex portion 3B of the shape and the guide tank 1C of the fixing member 1 are provided. The combination of these convex portions 3B and the pivot holes 2B allows the movable axis B (2
B, 2B), whereby the lens holding member 3 can swing about the movable axis B with respect to the swing member 2 in a vertical plane. The guide pin 3C is inserted into the guide groove 1C of the fixing member 1 and slides in the guide pin 1C to guide the storage and pushing of the lens holding member 3 (see FIG. 6).

FIG. 6 shows an assembly in which the three members of the fixing member 1, the swinging member 2, and the lens holding member 3 shown in FIGS. 3 to 5 are combined. As is apparent from FIGS. 3 to 6, the swinging member 2 has a fixed axis A (1A, 2A).
It swings in a vertical plane through the opening 13 of the fixing member 1 around the point A). The lens holding member 3 has a movable axis B
(2B, 3B) can be pivoted about the pivoting member 2 in a vertical plane with respect to the pivoting member 2, and the pair of guide pins 3C is inserted into the guide groove 1C of the fixed member and in the guide groove 1C. By sliding, the lens holding member 3 can be smoothly housed in the shell 7 of the liquid crystal projector or pushed out of the shell 7 of the liquid crystal projector under the guidance of the guide tank 1C.

The operation of the lens housing / extrusion apparatus of the present invention will be described with reference to FIGS. FIG. 8 shows a state in which the lens housing / extrusion device is housed in the liquid crystal shell (completely housed position) and locked by the latch means 4. At this time, the guide pin 3C of the lens holding member 3 is in contact with the left end 1L of the guide groove 1C, and the pressing means (pressing spring) 5 receives the maximum compression. When pushing out the lens 6 from this state, first, the latch of the latch means 4 is released, and the lens storage / extrusion device is automatically rebounded by the elasticity of the pressing spring 5 to be in the state shown in FIG. At this time, the pivot point B between the swinging member 2 and the lens holding member 3 rises to an appropriate height H exceeding the top of the shell 7 of the liquid crystal projector (indicated by an arc line TT in FIG. 9). In this state,
Subsequently, the operator can manually lift the lens housing / extrusion device until the guide pin 3C of the lens holding member contacts the right end 1R (see FIG. 10) of the guide groove 1C. At this time, the lens holding member 3 and the lens 6 reach the completely pushed position, and the liquid crystal projector is ready for use. As described above, a single-stage horizontally extending portion F is provided at the right end of the guide groove 1C.
In the state shown in FIG. 10, even if the lens holding member 3 is slightly pressed, the lens 6 is still maintained at the same height as long as the lens holding member 3 does not exceed the range of the F portion, so that sudden drop of the lens 6 can be avoided. As a result, the stability of the lens 6 can be maintained. On the other hand, when it is desired to store the lens 6, first, the pressing spring 5 is compressed by pressing the lens holding member 3 along the direction of the arrow P in FIG. 10, and the guide pin 3C is first moved along the guide groove 1C in FIG. Is horizontally moved only by the F portion, and then further moved to the lower left along the guide groove 1C. At this time, if a force is further applied in the direction of arrow Q in FIG. 9, the entire lens housing / extrusion device is driven to the completely housed position shown in FIG. Finally, the lens housing / extrusion device may be locked by the latch means 4.

FIG. 11 is a partial side view for explaining the optical path space which can be saved by employing the lens housing / extrusion apparatus according to the present invention. Now, when the lens of the liquid crystal projector is at the completely pushed position, the space I surrounded by the three members of the fixing member 1, the swinging member 2, and the lens holding member 3 starts from the inner space J of the shell of the liquid crystal projector. The light beam V incident on the inside first enters the reflecting mirror 8 fixed to the swinging member 2 via the optical path XY, and the reflected light beam passes through the optical path YZ again to the lens. The lens reaches the lens 6 held by the holding member 3. In this case, the route XY
And YZ are the required optical paths for the liquid crystal projector, and space I is the required optical path for the liquid crystal projector. Therefore, in the conventional lens-fixed type liquid crystal projector, in addition to the internal space J of the shell of the projector, the space I surrounded by the fixing member 1, the swinging member 2, and the lens holding member 3 in the completely pushed state is also important for the projector. It has become an indispensable optical path space. On the other hand, the projector provided with the lens housing / extrusion device of the present invention has the swing member 2
Since the lens holding member 3, the lens 6, and the like can be stored inside the shell of the projector, only the optical path space I can be omitted, and the size of the entire projector can be reduced accordingly.

The above is one embodiment (example) of the present invention.
However, the present invention is not limited to this. For example, in the above-described embodiment (embodiment), after the pressing means is opened, the lens holding member is first pushed out to some extent by the pressing force of the pressing means (the pivot point between the swinging member and the lens holding member is set to the position of the liquid crystal projector). The case where the lens holding member is manually lifted by the operator to the position where the lens holding member is completely pushed out has been described. However, the pressing force of the pressing means is set to be appropriately large. After the pressing means is opened, the pressing means may directly push the lens holding member member to the completely pushed-out position. The guide pin 3C
In order to be smoothly guided by the guide tank 1C and to smoothly move into the guide tank 1C, rolling bearings (not shown) are further provided on the outer periphery of each guide pin 3C, and the rolling bearings move inside the guide tank. By rolling, lens storage
The storing and pushing operation of the pushing device may be guided. Also, the pressing means is not limited to the illustrated coil spring,
Other types of springs are also good. Also, the latch means is not limited to the form shown in the embodiment, and other forms can be adopted.

[0015]

As described above, according to the lens housing / extrusion apparatus of the present invention, when the liquid crystal projector is not used, the lens can be housed in the shell by a simple operation. With a simple operation, the lens can be pushed to a completely pushed position where the lens can be used, so that the operation is simple. In addition, the optical path can be shortened and the size of the liquid crystal projector can be reduced, so that it is small, lightweight and portable, and when not in use, the lens housed in the shell is protected by the shell and damage is prevented. Can be avoided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a state in which a liquid crystal projector having a lens storage / extrusion device according to an embodiment of the present invention is placed at a completely pushed position (a usable position).

FIG. 2 is a perspective view showing a state in which a liquid crystal projector having a lens housing / extrusion device according to an embodiment of the present invention is placed in a completely housed position.

FIG. 3 is a perspective view showing a fixing member according to the present invention.

FIG. 4 is a perspective view showing a swing member according to the present invention.

FIG. 5 is a perspective view showing a lens holding member according to the present invention.

FIG. 6 is a side view showing an assembly including three members of a fixing member, a swing member in a completely pushed-out position, and a lens holding member.

FIG. 7 is a side view showing a guide groove of the fixing member.

FIG. 8 is a schematic side view showing a state where the lens housing / extrusion device is placed at a completely housed position.

FIG. 9 is a schematic side view showing a state in which the lens is automatically rebounded after the latch means of the lens housing / extrusion device is opened.

FIG. 10 is a schematic side view showing a state where the lens housing / extrusion device is located at a completely pushed-out position.

FIG. 11 is a side view for explaining an optical path space that can be saved by adopting a lens housing and pushing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing member 1C Guide groove 2 Swinging member 3 Lens holding member 3C Guide pin 4 Latch means 5 Pressing means (Pressing spring) 6 Lens 7 Shell 10 Liquid crystal projector A (1A, 2A) Fixed axis B (2B, 3B) Movable axis

Claims (3)

(57) [Claims] 1. A lens housing for a liquid crystal projector which is attached to a shell of a liquid crystal projector having a top wall and selectively stores a lens of the liquid crystal projector in a completely storing position in the shell and to a full pushing position where the lens is used. In the extrusion device, a top fixed to the top wall of the liquid crystal projector and having an opening, a fixing member having at least one elongated guide groove and a fixed axis, and a pivot about the fixed axis of the fixing member. A swinging member capable of swinging in a vertical plane around the fixed axis through an opening of the fixed member, and a pivot holding the lens and a movable axis of the swinging member. Each of the guides has at least one guide pin that is swingable about a vertical axis about the movable axis in a vertical plane and that corresponds to the elongated guide groove of the fixed member. A pin is inserted into each corresponding guide groove and moves in the guide groove, thereby guiding a storage / extruding operation of the pin. A lens receiving member is selectively operated to completely store the lens holding member in a completely stored position. Latch means for locking or opening the lens holding member and pushing it out of the shell of the liquid crystal projector for use, and being provided between the swinging member and the lens holding member, for storing and pushing the lens. And a pushing means for pushing out the lens holding member by an elastic force after the apparatus is opened. 2. The fixing member has two parallel side surfaces extending downward from the top, and the at least one guide groove has two identical shapes provided on the two side surfaces, respectively. 2. The liquid crystal projector according to claim 1, further comprising a guide groove, wherein the at least one guide pin of the lens holding member includes two guide pins respectively corresponding to the two guide grooves of the fixing member. Lens storage and extrusion equipment. 3. A rolling bearing is provided on the outer periphery of each of said guide pins, and each of said guide pins is guided in said guide groove by rolling in said guide groove. The lens storage / extrusion device of the liquid crystal projector to be described.