JPH04153070A - Electronic equipment with cooling device - Google Patents

Abstract

PURPOSE:To cool the inside of a box body, to reduce the cost of a product largely, to lower extremely noises during cooling operation and to minimize power consumption by turning a windmill through a gear and a shaft by receiving the driving force of a driving source loaded on an electronic device. CONSTITUTION:When printing operation is started, a shaft 17 is rotated by a carrier motor 21, and a belt 18 begins to be moved in the direction of the arrow A of a solid line. Since the belt 18 and a carriage 19 are coupled mutually, the carriage 19 is begins to be naturally shifted in the same direction as the belt 18. When a recording device starts printing, a gear 4 is turned. Since a gear 9 is directly coupled with the gear 4, the gear 9 is revolved naturally in the direction A. Consequently, an arm 16 is energized by the revolution of the gear 9 and moved in the direction A, thus fitting a planet gear 10 to a gear 14. Since a gear 6a is integrally molded with a shaft 6, revolving torque is transmitted over a shaft 7 from the shaft 6, and lastly a windmill 1 is rotated in the direction of a solid line.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to electronic equipment equipped with a cooling device.

[Prior Art] Conventionally, a cooling device installed in an electronic device has a windmill attached to a direct current electric motor (hereinafter referred to as a DC fan), receives voltage from the main body power supply section, and rotates the DC fan to cool the inside of the housing. Perform cooling.

[Problem to be solved by the invention] However, in the above-mentioned conventional example, a DC fan is installed inside the housing, and the DC fan is rotated to discharge heat to the outside, which has the following drawbacks. .

(1) The use of a DC fan increases the cost of the product.

(2) The motor is noisy.

[Means and effects for solving the problems] According to the present invention, a windmill is rotated via a gear and a rotating shaft by receiving the driving force of a drive source mounted on an electronic device.

[Embodiment] Fig. 1 is a drawing of a cooling device showing one embodiment of the present invention. In the figure, 1 is a wind turbine, and 2 and 3 are cases that house a gear transmission mechanism.

4 is a gear fitted to the rotation shaft of the drive source of the recording apparatus.

5 is a shaft for transmitting the rotational force received by the gear 4 to the gear transmission mechanism. 6 and 7 are shafts that transmit rotation to the wind turbine 1 from a gear transmission mechanism. 8 is an elastic body joint.

When the recording device starts a printing operation, the gear 4 fitted to the rotating shaft of the recording device rotates, and the rotational force is transmitted through the gear transmission mechanism housed in the cases 2 and 3, and then to the shafts 6 and 7. The windmill l is rotated through the

FIG. 2 is a diagram showing details of the gear transmission mechanism 5 described above.

A gear 9 is provided which is fitted onto the aforementioned gear 4 via a shaft 5. Such a gear 9 is connected to a planetary gear 10 and an arm 16 (V). The arm 10 moves in the direction of rotation of the gear 9, and the planetary gear 10 selectively engages the gears 11 and 14. The rotation of gears 11 and 14 is transmitted to gear 12 directly or via gear 15, and gear 12 always rotates in one direction. According to the gear transmission mechanism described above, the gear 12 transmits its rotation to the gear 6a via the directly connected gear 13 to rotate the windmill 1 in one direction, regardless of the rotation direction of the gear 4, as shown in FIG. First, the rotation direction of the wind turbine 1 does not change (it is in one direction).

That is, the windmill rotates in one direction regardless of the direction in which the carriage of the recording apparatus moves.

The above-mentioned cooling device is incorporated into, for example, a recording device as shown in FIG.

In the figure, reference numeral 17 denotes a rotating shaft, which is rotated by a carrier motor 21. The rotation of the rotating shaft 17 is the same as that of the other rotating shaft 17.
The signal is transmitted to the belt 18 that is placed between the rotating shaft 17 and the rotating shaft 17, and the carriage 19 fixed to the belt 18 moves from side to side. A print head 20 and an ink cassette serving as an ink supply means are placed on the carriage 18 .

The rotating shaft 17 is also engaged with the gear 4 shown in FIG. 1 to drive the wind turbine 1.

The recording device as described above operates as follows.

That is, when the printing operation is started, the rotating shaft 17 is rotated by the carrier motor 21, and the belt 18 begins to move in the direction of the solid line arrow (A) shown in Figure $2. Since the belt 18 and the carriage 19 are coupled to each other, the carriage 19 necessarily moves in the same direction as the belt 18.

When the recording device starts printing, the gear 4 (first section) rotates in the A direction for the above reason. Since the gear 9 is directly connected to the gear 4, it also rotates in the A direction. Then, the arm 6 is negatively biased by the rotation of the gear 9 and moves in the A direction, so that the planetary gear 10 fits into the gear 14. In other words, the rotational force received from the gear 4 or the recording device is transferred from the gear 9 to the gear 10 to the gear 14.
→ Gear 15 → Gear 12 → Gear 13 is followed to reach gear 6a. Since the gear 6a is formed integrally with the shaft 6, the rotational force is transmitted to the shaft 6 and the shaft 7, and finally causes the windmill 1 to rotate in the direction of the solid line.

When one line or several characters have been printed, the carrier motor 2
is reversed, and the carriage 19 begins to move in the direction of the broken line (B).As the carriage 19 begins to move in the direction of B, the belt 1
8 moves in direction B. At this time, gear 4 now rotates in direction B, and gear 9 also rotates in the same direction. The arm 16 is moved in the direction of the dashed arrow by the negative force of the gear 9. Therefore, the path of rotational force is from gear 9 to gear lO → gear 11 → gear 12
→It becomes gear 13 and reaches gear 6a. However, since the rotational direction of the gears 12 and 13 coincides with the rotational direction during the printing operation, the rotational direction of the windmill 1 is also the same.

Then, it waits for the next printing position. The above operations are repeated to print on the recording paper.

The recording device and cooling device H described above are arranged as shown in FIG.

In the figure, C is a case, P is the above-mentioned recording device, and 6C0 is the above-mentioned cooling device.

The CRT is a display, and electronic components (not shown) are placed behind it.

As mentioned above, it is a record bag! When P operates, the carriage moves from side to side, and accordingly, the cooling device C0 operates, and the windmill 1 rotates, causing the air inside the case C to flow and being exhausted to the outside through the hole in the case C.

Furthermore, according to the present invention, the cooling device operates during the printing operation on the recording paper, which is said to increase the temperature inside the housing the most, and also performs a cooling action corresponding to the printing speed of the recording device, so the cooling efficiency is extremely high. expensive.

According to the present invention, the windmill rotates at a speed corresponding to the printing speed of the recording device. Therefore, when the cooling device of the present invention is attached to a recording device with a slow printing speed, the rotational speed of the windmill will naturally become slow.

However, there are many electronic devices that are equipped with recording devices with slow printing speeds, and the internal temperature of the casing increases significantly.

In order to apply the present invention to such electronic equipment, the gear train in the gear transmission mechanism may be adjusted. That is, the sixth
Are the figures and Figure 7 an example of concrete measures taken?
As shown in the same figure, mechanisms 22, 22a, 26.
26a may be provided.

[Other Embodiments FIG. 8 is a drawing showing other embodiments of the present invention.
In the figure, 101 is a rotating shaft, ]02 is a windmill 103, which is a rotatable rotating table, ]04 is a gear that transmits the driving force of the printer's carriage motor to the windmill 102, and 105 is a gear to be attached to the main body or printer. It's a bracket.

A gear 101a is formed at one end of the rotating shaft 101, and the rotating shaft 101 is rotatably attached to a groove 1038 provided in the rotating table 103.

On the other hand, a telescopic rod 02a is fitted to the other end of the rotary shaft 1, and is adapted to be housed in or pulled out from the rotary shaft 101 and rotated together with the rotary shaft 101. Further, a windmill 102 is connected to the other end of the telescopic rod 102a.

There are tooth profiles 104a and 104 on the front and back of the gear 104, respectively.
b is formed, and the gear 104 is rotatably attached to the turntable 103. Further, the tooth profile 104b is fitted into the gear 101a, and the tooth profile 104a is connected to the rotating shaft 107 of the recording device described above.
mated to. As shown in FIGS. 9 and 10, the rotary table 103 is rotatably attached to the bracket 105 coaxially with the rotation axis of the gear 104.

In this example, the rotary shaft 107 is fitted into the teeth 104a of the gear 104, and the rotational force from the carrier motor is transmitted to the rotary shaft 101, causing the windmill 102 to rotate.

In the embodiment, the windmill 102 rotates in two directions, forward and reverse, due to the reciprocating motion of the carriage (which has the effect of stirring heat). However, since the internal heat distribution and convection characteristics differ depending on the shape of the housing, it is better to set the rotation direction of the wind turbine 2 in one direction (intake or exhaust only) to better alleviate the temperature rise inside the housing. There are cases where

Therefore, in that case, as shown in Fig. 11, the rotation axis is
One-way clutch 110 such as split and spring clutch
If the rotating shafts are connected to each other via the wind turbine, the rotating direction of the wind turbine can be limited.

In the above example, the heat generated by the recording device affected other electronic components, but it can also be installed inside the recording device, or if it is an electronic device equipped with a drive source, it is limited to the recording device. It is clear that the present invention can be applied without any restrictions.

[Effects of the Invention] As described above, by attaching the present invention to an electronic device, the windmill can be rotated by receiving the driving force, thereby cooling the inside of the housing.

The present invention has a very simple configuration (mechanism) to perform cooling, but compared to the case where a DC fan is installed, 1. It is possible to significantly reduce the cost of the product.

2. Noise during cooling operation is extremely low.

3. Possible to reduce power consumption.

You can get that advantage.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a cooling device embodying the present invention, Fig. 2 is a diagram of the operating principle of the present invention, Fig. 3 is an internal structure diagram, and Fig. 4 is a plan view of a recording device. 6 is a diagram of the operating principle of the second embodiment, FIG. 7 is an internal structure diagram of the second embodiment, and FIG. 8 is a diagram showing another embodiment according to the present invention. Figure 9 is the 8th
10 is a view taken along the X arrow in FIG. 8, FIG. 11 is a plan view of another example according to the present invention, l is the wind turbine 2 and 3, case 4 is the gears 5 to 7, Shaft 8 is an elastic joint

Claims (1)

[Scope of Claims] An electronic device comprising: a means for transmitting the driving force of a drive unit that drives a driven object; and a cooling means for air-cooling the inside of the electronic device by the transmitting means.