JPS5916920Y2 - projector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projector that simultaneously has various functions necessary for using the projector itself.

Conventionally, a projector 1 as schematically shown in FIG.
is well known.

That is, the projector 1 condenses light from a light source 3 provided in a housing 2 using a transparent plate 4 stretched over an opening of the housing 1 and a convex lens or the like provided above the transparent plate 4. It is projected onto a screen 7 provided at a desired position via a lens 5 and a mirror body 6, and characters, figures, graphs, etc. are drawn or drawn in advance on a transparent sheet 8 placed on the transparent plate 4. It is constructed so that characters, etc. can be projected on the screen 7 in an enlarged state, and is widely used in classes at various schools, lectures, training sessions, etc.

However, in conventional projectors, the height, more specifically, the height of the transparent plate 4 on which the transparent sheet 8 is placed, is fixed, and the height of the conventional projector is fixed, and the height of the transparent plate 4 on which the transparent sheet 8 is placed is fixed. In addition, it caused great inconvenience because the heights and sitting heights of the users were different.

Furthermore, since the present invention has only a single function as a projector, it is not possible to satisfy the various functions necessary for use with a single projector.

It was developed with attention to these problems, and its purpose is not only to provide a projection function, but also to provide an installation that allows the installation height to be set arbitrarily depending on the user or usage conditions such as sitting or standing. In addition to being equipped with highly variable functions, it also has a storage function to store accessories necessary for using the projector, such as a projection screen 1-1 folded screen for projecting characters, figures, graphs, etc., and related documents. The purpose of the present invention is to provide a multi-functional projector that has both a teacher's desk function and a teacher's desk function at the same time.

Furthermore, another objective is to rationally combine the above-mentioned functions and summarize them in a compact manner.
The present invention provides a projector that is convenient to use, take down, and transport.

Next, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 2 and 3, the base 101 is a casing having a desired volume and height to which a swinging door 102 is attached so as to be openable and closable with a hinge 103, and its opposing sides have an elongated U-shaped cross section. guide arms 104 each having a shape of
A support rod 105 is attached to one of the guide arms 104 with one end being a free end so as to be rotatable in a vertical plane.
Casters 107 each equipped with a fixing rod 106 are disposed at the four corners of the bottom of 01.

The casters are provided to facilitate the removal and transportation of the projector of the present invention.

Furthermore, support arms 201 and 201 are slidably fitted into the pair of guide arms 104 and 104, respectively (see FIG. 8), and the base is held by the support arms 201 and 201. A projector body 2 separate from the stand 101
02 is attached to support arms 201, 201, and on the side of the projector body 202 are switches 203, 204, an air window 205, an exhaust window 206 (see FIG. 8), a knob 207 for vertically moving the light source, and a knob 207 (also described later). A knob 208 (see FIG. 8) for finely adjusting the vertical movement of the support rod is provided, and the bottom of the projector main body 202 and the base 10
Rubber rods 209 and 108 for cushioning are stretched at opposing positions at the four corners of the top surface of 1, respectively.

A transparent plate 21 is provided at the upper opening of the projector main body 202.
A lid body 211 with double tension 0 is provided so as to be openable and closable by a hinge 212, and one corner of the lid body 211 has a notch 213.
and an engagement protrusion 215 that engages with the engagement holes 214, 214 formed in the upper side of the opening of the projector main body 202.
, 215 are implanted on the inside and sides of the lid body 211.

A side stand 111 is attached to the upper part of one guide arm 104 of the pair of guide arms 104, 104 so as to be rotatable around a shaft part 110 by means of a connector 109, and the support rod 105 is attached to the surface of the side stand 111. A stop hole 112 into which the free end can be inserted is bored.

Next, to explain in detail the inside of the projector main body 202, that is, the projection mechanism itself, as shown in FIG. The support rod 217, which has a length approximately equal to the sum of the heights of the projector main body 202 and the base 101, is slidable within a guide plate 218 disposed along the insertion hole 216, and is supported. A rack 219 is installed at the lower part of one side of the rod 217 facing inside the projector main body 202, and a lower limit stop 220 having a cross-section is fixed to the upper part of the rack 219.
An upper limit stop 221 is provided protruding from the lower side surface of 7.

Furthermore, the projector body 202 facing the guide plate 218
A pinion 2 that can mesh with the rack 219 is provided on the inner wall of the rack 219.
22 is installed so as to be rotatable in a vertical plane about an axis rod 224, and a spring 225 is interposed between the wall surface of the projector main body 202 and the horizontal rod 223. The horizontal rod 223 is always urged in the direction of arrow A, and the rack 219 and pinion 222 can be engaged with each other.

A knob 208, which is connected to the pinion 222 by a connecting rod 226 and rotates to finely adjust the vertical movement of the support rod 217, is arranged on the outer surface of the projector body 202, and a knob 208 is provided on the outer surface of the projector body 202, A crescent-shaped groove 227 is provided to allow the rod 223 to rotate.

A rotating arm 228 is rotatably attached to the top of the support rod, and the tip of the rotating arm 228 is attached to the ring portion 22.
9 to hold the convex lens 230 in a horizontal plane, and a mirror holder 231 is disposed on the ring portion 229 so as to be rotatable in the horizontal plane. Rotating mirror 2
33 is disposed facing the convex lens 230.

Further, FIG. 5 schematically shows the inside of the projector main body 202, and a light source support frame 236 that supports a light source 234 and is pivotally attached to a shaft 235 is disposed at the center of the bottom surface of the projector main body 202. The interlocking arm 237, which has a U-shaped cross section and has both ends pivoted to the shaft rod 235, is connected to the shaft rod 235, which is attached to a column 238 fixed to the bottom of the projector main body 202.
39, and has an interlocking plate 240 having a U-shaped cross section, and the interlocking plate 240 has an operating rod 241 which is rotated by a knob 207 disposed on the outer surface of the projector main body 202 and has a threaded tip. are screwed together.

The light source 234 is turned on and off by the switch 203.
A fan 243 is fixed to the rotating shaft of the motor 242, which is turned on and off by the switch 204, facing the exhaust window 206.

Next, mainly referring to FIG. 6, the projector main body 202
A variable installation height mechanism that can be variably set in two stages will be explained.

(However, a pair of guide arms 104, 104 and a pair of support arms 2
01 and 201 are exactly the same on the left and right sides of the projector main body 202, only one of the installation height variable mechanisms will be described.

) First, the support arm 20 is inserted into the guide arm 104 described above.
A grip part 244 is formed by providing an elongated space in the upper part of the grip part 1, and an intermediate plate 246 is fixed to the lower part of the engaging/disengaging operation rod 245 which is arranged in the grip part 244 so as to be movable up and down. A signboard 249 whose one end is pivotally connected to a rotating plate 248 and 248 that can be rotated around the shaft rods 247 and 247 provided at 246;
．． 249 has engaging/disengaging protrusions 250° and 250° at its tip, respectively.
and a shaft rod 251°25 provided on the inner wall of the support arm 201.
1 as a fulcrum, and the engaging/disengaging protrusion 250°25
0 is an engagement hole 113 bored on both sides of the guide arm 104;
113.

A spring 253 is interposed between the bottom of the intermediate plate 246 and a spring receiver 252 provided on the inner wall of the support arm 201, and constantly urges the intermediate plate 246 and the engagement/disengagement operation rod 245 in the direction of arrow B. are doing.

FIG. 7 shows a sliding mechanism for facilitating the sliding of the support arm 201 within the guide arm 104, and shows a spring receiving plate 254 fixed to the lower inner wall of the support arm 201 and having a cross section of approximately A spring 256 is interposed between the overplate 255 which is shaped like a letter and loosely provided in contact with the inner wall of the support arm 201, and a sliding wheel 257 that rotates around a shaft protruding from the overplate 255 is provided with a spring 256. The support arm 201 is configured to rotate and slide into contact with the inner wall of the guide arm 104 through a through hole 258 near the side surface of the support arm 201 .

When the projector having the above configuration is not in use, the side stand 111 can be placed on top of the lid 211 and used as a protection plate to protect the transparent plate 210, as shown in FIG. The base 101 can also be used as a cabinet for storing accessories such as a projection sheet for projecting characters, figures, graphs, etc., a folding screen, related documents, and the like.

When using the projector, as shown in Figure 3,
First, rotate the side stand 111 around the shaft part 110, and
The free end of the support rod 105 is inserted into the support rod 2 and fixed in a horizontal plane.

This side stand 111 is used not only for placing projection sheets and documents, or as a kind of work table, but also as a teacher's table.

Next, open the lid 211 and remove the convex lens 230 and mirror 23.
The support rod 217 equipped with 3 is attached to the projector body 202.
There is a way to pull it out from inside, but this can be done by pressing the mallet 223 shown in FIG. 4 in the opposite direction to the arrow A direction against the elastic force of the spring 225 in the arrow A direction. The punch 223 rotates around the shaft 224, and a gap can be provided between the lower limit stop 220 of the support rod 217 and the rack 219 and the pinion 222, so that the support rod 217 can be pulled upward. Become.

After pulling out the support rod 217 to a predetermined height, the mallet 2
23, the pinion 222 and rack 21
9, and by rotating the knob 208, the support rod 21
7 vertical movement fine adjustments can be made.

Next, the lid 211 is returned to its original position to close the opening of the projector main body 202.

At this time, since one corner of the lid body 211 is a notch 213, the support rod 217 is engaged with the position of the notch 213,
Further, the locking protrusions 215, 215 of the lid body 211 fit into the engaging holes 214, 2 formed in the upper side of the opening of the projector main body 202.
14, and the lid body 211 is connected to the projector body 202.
Can be fixedly installed in the opening of the

Furthermore, the rotating arm 228 provided at the top of the support rod 217 is rotated to position the convex lens 230 almost directly above the transparent plate 210, and the switches 203 and 204 are turned on to turn on the light source 2.
34 and the fan 243 to emit light and rotate, and the operating rod 23
2 to set the angle of the mirror 233, and rotate the mirror holder 231 to set the screen (
(not shown) onto which a light source from a light source 234 is projected.

(See Figure 8a) After setting in this way, the transparent plate 210
If characters, figures, etc. are drawn on a transparent sheet (not shown) placed above, the characters, etc. are projected onto the screen as an enlarged image.

Incidentally, fine adjustment of the vertical movement of the mirror 233 and the convex lens 230 can be made by rotating the knob 208 and moving the support rod 217 up and down by the engagement of the rack 219 and pinion 222 (at this time, the lower limit stop 220 and the lower limit stop 221 are used). The vertical movement of the support rod 217 is restricted.

), and to finely adjust the vertical movement of the light source 234, by rotating the knob 207 and pressing the interlocking plate 240 in the direction of arrow C in FIG. This can be done by lifting the support frame 236 upward.

Next, if the user wishes to use the projector while standing, the user operates the installation height variable mechanism shown in FIG. 6 from the state shown in FIG. 8a to the state shown in FIG. do it.

That is, by placing your hand on the grip portion 244 of the support arm 201 provided on both left and right sides of the projector main body 202, use your thumb or the like to move the locking/disengaging lever 245 in the direction of the arrow against the upward elastic force of the spring 253. When pressed down, the pair of rotating plates 248 and 248 expand using the shaft rods 247 and 247 as fulcrums, and further expand the tilting plate 24.
9 and 249 rotate about the shaft rods 251 and 251, and the locking and disengaging protrusions 250 and 250 provided at their tips move in the direction of arrow E to engage the locking hole provided in the lower part of the inner wall of the guide arm 104 (see FIG. (not shown), allowing the support arm 201 to be pulled up.

While maintaining this state, the support arms 201, 201, that is, the projector main body 202, are pulled upward. At this time, the sliding wheels 257 shown in FIG. Smooth sliding within the arm 104 can be achieved.

The support arms 201, 201 are pulled up to a predetermined position, and the engagement/disengagement protrusions 250, 250 engage the engagement/disengagement holes 113, 11 of the guide arm 104.
3, when the pressure on the lever 245 is released, the levers 250, 250 engage with the holes 113, 113 by the elastic force of the spring 253, and the projector main body 202 can be set in this position.

(See Figure 8b) Also, the state set in two stages (Figure 8b)
When it is desired to return to the original state (a in the figure), the engaging/disengaging operation rod 245 is pressed down again to perform the operation opposite to the above.

Furthermore, even after use, the state shown in FIG. 2 can be achieved by performing the reverse operation to that described above.

In addition, in the installation height variable mechanism in the above embodiment,
Although the case where the projector main body 202 is set in two stages has been described, if, for example, two or more sets of engagement holes 113 are provided in the guide arm 104, the projector main body 202 can be set in two or more stages.

As described in detail, according to the present invention, the projector body has its own projection function and an installation height variable mechanism that allows the installation height of the projector body to be set to any desired position. At the same time, the side stand can be used as a stand for placing teaching materials and documents, as well as a teaching table, and the base can be used as a storage cabinet for projection sheets, screens, documents, etc., making it possible to use projection for classes, lectures, training sessions, etc. It is sufficient to prepare one projector.

Therefore, the hassle of having to separately prepare a projector body, a projector mounting stand, a teacher's desk, a cabinet, etc., as in the past, is eliminated.

Moreover, since the above-mentioned functions are organized in a rational and compact manner, it is convenient for use, removal, and transportation, and its effectiveness is extremely large.

[Brief explanation of drawings]

Fig. 1 is a schematic structural diagram illustrating a conventionally well-known projector, and Figs. 2 to 8 show a projector according to the present invention.
Fig. 2 is a slope view during storage, and Fig. 3 is a side stand 111. FIG. 4 is a perspective view of the lid body 211 and the swing door 102 in an open state; FIG.
5 is a schematic structural diagram illustrating the inside of the projector main body 202, FIG. 6 is a partially cutaway front view illustrating the engagement and disengagement mechanism, and FIG. 7 is a sectional view taken along the line Vll-VII in FIG. FIG. 8 is a perspective view showing the set state, and FIG. 8A shows the normal set state, and FIG. 8 shows the two-stage set state. 101... Base, 104... Guide arm, 111... Side stand, 113... Engagement/disengagement hole, 201... Support arm , 202...Projector main body, 208...Knob (for fine adjustment of vertical movement of support rod 217), 210...Transparent plate,
211...Lid body, 217...Support rod,
219... Rack, 222... Pinion, 223... Horizontal member, 225... Spring, 230... Convex lens, 233... ... Mirror, 234 ... Light source, 243 ... Fan, 244 ... Grip, 245 ...
Engagement/disengagement operation rod, 250... Engagement/disengagement protrusion.

Claims (1)

[Scope of utility model registration request] It is mounted on a base with a housing structure attached with a swinging door, and a pair of support arms that can slide along a pair of guide arms arranged on opposite sides of the base. A projector main body that is mounted and slides along a guide plate disposed in an insertion hole of the projector main body, and includes a support rod having a rotating arm at its tip equipped with a convex lens and a mirror, and the guide arm. It is rotatably supported on one guide arm of the projector, and when the projector is in use, it is supported by a support rod attached to the guide arm and used as a teacher's desk, and when it is not in use, it protects the transparent plate on the lid of the projector body. a side stand used as a protective plate; a variable installation height mechanism that sets the installation height of the projector by variably fixing the relative positions of the guide arm and the support arm; the base, the projector main body, the side stand; A projector consisting of casters that support and move the projector, which is also integrally equipped with a variable installation height mechanism.