JPS602585Y2 - overhead projector - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of an overhead projector in which a pole and a head portion can be completely housed inside the main body.

Generally, in an overhead projector, the front, back, left and right sides of the stage surface on which the document is placed must be left wide open for unfolding and moving the document, so it is desirable that the pole supporting the head be installed in one corner of the main body.

On the other hand, the head supported by the tip of the pole must be located at the center of the optical axis, that is, above the center of the stage surface, so the pole shape is usually three-dimensional. Difficult to store inside.

For this reason, only the head part is removed and stored inside the main body, or the pole is rotated and folded towards the main body side, but both the head part and pole are completely stored inside the main body. There is nothing that has been made possible,
There were major difficulties in portability and packaging.

This idea was made in view of the above points, and the lower part of the pole is planted in one corner of the projector body, and the head part attached to the upper part of the pole is supported so as to be positioned above the center of the stage surface. In this type of overhead projector, both the head part and the pole can be completely housed in the main body, and the air intake port provided in the main body to promote heat dissipation from the light source part is almost closed by storing the pole. It also prevents dust from entering the main body when stored.

This invention will be explained below with reference to embodiments of the accompanying drawings.

Referring to Figures 1 and 2, 1 is the main body of an overhead projector with a built-in light source, 2 is a top lid that is hinged to the main body 1 so that it can be opened and closed, and has a stage surface 2a on the top surface. Cutouts 2b and 2c are provided respectively to form a long and narrow air intake port between the body and the side surface of the main body, thereby promoting heat dissipation from the light source section during use.

Reference numerals 3 and 4 designate a lower pole and an upper pole, which are formed by dividing a pole for supporting the head portion H in a manner that it can be freely inserted and removed at the center, and bent so as to be approximately symmetrical with respect to the dividing point.

The bending base 3a of the lower pole 3 is inserted and fixed by the through hole 2d bored in the - corner of the upper cover 2 and the support part 1a formed inside the main body.

The upper pole 4 has approximately the same shape as the lower pole 3 and has a bent tip 4a corresponding to the bent base 3a, and an insertion portion 4b inserted into the upper end receiving portion of the lower pole 3 at the opposite end. has.

At the bent end portion 4a of the upper pole 4, a head portion H includes a support frame 8 that rotatably supports the head 5 and is fixed at an arbitrary height by an eccentric cam 6 and a knob 7. is installed.

Then, as shown in FIG.
Along the lines c and 2b, there are provided pole storage portions in which the upper pole 4 and the lower pole 3 are separated and stored individually.

11 and 12 are fasteners for fixing the pole.

Further, the main body 1 is provided with a portable handle 9, and
A head storage section is provided inside the front surface, and a front lid 10 is attached to the front surface to cover the opening.

According to this embodiment configured in this manner, from the operating condition shown in FIG.
As shown in FIG. 4, this head part H is inserted into the head storage part in the main body 1 through the opening 1b, semi-fixed by an appropriate fixing method, and the upper pole 4 is pulled out from the lower pole 3, and the lower pole 3 from the main body 1, and as shown in FIG.
Fasteners 11.12 are attached to the pole storage areas on the left and right sides of the back side of the
If the head part H and the upper and lower poles 4 and 3 are semi-fixed, both are completely housed within the main body.

Therefore, it is extremely easy to carry the device using the handle 10.

In addition, in this stored state, the notches 2b and 2c forming the air intake ports are substantially closed by the upper and lower poles 4 and 3, thereby preventing entry of dust and the like.

As described above, according to this invention, the three-dimensional pole of an overhead projector is divided into an upper pole and a lower pole, which are removably inserted at the center and have approximately the same shape. The shape is simple, improving productivity, and the upper and lower poles and head can be separated and completely housed within the main body (including the upper lid) without being constrained by the dimensions required by the optical system. This greatly improves portability and makes packaging easier.

In addition, the lower pole can be inserted and removed from the main body support part, so
Since it does not require a complicated mechanism such as a rotating part and has a simple structure, it has improved durability and can be supplied at low cost.

Furthermore, by storing the upper and lower poles in their respective pole storage sections, the air intake port formed between the main body and its top cover is substantially closed, so that dust can be prevented from entering from the outside during storage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of the overhead projector according to this invention in a used state, FIG. 2 is a perspective view showing the appearance in the stored state, and FIG. 3 is a perspective view of the main parts showing the state of the pole storage part of the upper lid. FIG. 4 is a perspective view of a main part of the main body showing a state in which the head is being stored. 1...Main body, 2...Top lid, 2a...
...Stage surface, 2b, 2c...Notch, 3
・・・・・・Lower pole, 4・・・・・・Upper pole,
5...Head, 8...Support frame, H...
・・・Head part.

Claims (1)

[Scope of utility model registration request] In an overhead projector in which the lower part of the pole is planted in one corner of the main body and the head part attached to the upper part of the pole is supported so as to be positioned above the center of the stage surface, the pole is divided at the center so that it can be inserted and removed. The upper pole and the lower pole are bent so as to be approximately symmetrical with respect to the dividing point, and the upper pole and the head portion and the lower pole and the main body are respectively removable and removable. A notch forming an elongated air intake port between the left and right sides of the top lid, which is attached to the main body and has a stage surface that can be opened and closed freely, is provided on the left and right sides of the top lid. An overhead projector characterized in that a pole storage section is provided in which an upper pole and a lower pole are separated and stored individually, and a head storage section is provided in the main body to accommodate the head section.