JPH07121076B2 - Image reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an image reading apparatus having a built-in audio input section and using a photoelectric conversion section, and particularly to preventing operation noise during operation of the moving mechanism of the photoelectric conversion apparatus. It is about means.

[Conventional technology]

With respect to this type of image reading apparatus, a device excellent in operability has been proposed by the inventors of the present application in Japanese Patent Application No. 60-176083.
Proposed / disclosed in the issue. That is, although not shown in the drawing, in the proposed apparatus, a document table, a photoelectric conversion unit such as an electronic camera, a monitor and the like are integrated, and
The photoelectric conversion unit is configured to be movable up and down on the support member by the moving mechanism, and thus the reading magnification can be varied.

In the above proposed example, if a voice input unit such as a microphone (hereinafter, abbreviated as a microphone) is built in the main body, the convenience / operability when using this device for a lecture or the like is further improved. Become.

[Problems to be solved by the invention]

However, if the microphone is simply built in as described above, the microphone picks up operation noise such as lock / unlock in the moving mechanism of the main body when the photoelectric conversion unit is moved up and down, that is, when performing the zoom operation, It will make the audience uncomfortable. It is not preferable to construct the main body so that the operation sound is not transmitted to the microphone, because it is mechanically difficult, and the cost is considerably increased.

The present invention has been made in view of the above situation, and an object thereof is to block the unpleasant noise with an extremely simple configuration.

[Means for solving problems]

Therefore, in the image reading apparatus of the present invention, a mounting table for mounting the image to be read, a photoelectric conversion unit for converting an optical image of the image to be read into an electric signal, a voice input unit, A fixed part provided on the mounting table, a support member movably supported on the fixed part so as to change the distance of the photoelectric conversion part with respect to the mounting surface of the mounting table, and the support member. Operation member for permitting the movement of the operation member, detection means for detecting that the operation member is operated, and control for minimizing the output of the voice input unit according to the detection result of the detection means. It is intended to achieve the above-mentioned object by including the means.

[Action]

With the above-described configuration, the output of the voice input unit is minimized while the moving mechanism of the photoelectric conversion unit is operating, so that the output of unpleasant operation noise is prevented.

〔Example〕

 Hereinafter, the present invention will be described based on Examples.

FIG. 2 and FIG. 1 are a perspective view and an enlarged sectional view taken along the line AA of the image reading apparatus according to the first embodiment of the present invention, respectively.

(Structure) In FIGS. 1 and 2, reference numeral 1 is a mounting table on which an image 1a to be read is mounted. In order to adjust the white balance (white balance) of the electronic camera 2 having a photoelectric conversion unit for reading an image of a document or the like, which will be described later, the surface of the mounting table 1 on the camera 2 side is an achromatic gray. There is. The surface of the mounting table 1 on the camera 2 side may be white, but if the amount of light incident on the photoelectric conversion unit in the camera 2 is too large, the output of the photoelectric conversion unit may be saturated and the white balance cannot be adjusted properly. In order to prevent the presence, gray, which has a lower reflectance than white, is preferable. Further, the mounting table 1 is a diffuse reflection plate so that irregularly reflected light does not enter the camera 2 from the mounting table 1. Reference numeral 2 denotes a camera fixedly supported by a horizontal support portion 3 described later, which has a color photoelectric conversion portion. Three
Is the horizontal support part, which is slidable in the direction of the arrow X shown in the drawing, and can move the region affected by the camera 2. A vertical support 4 is fixed to the horizontal support 3 and is slidable in the direction of arrow Z shown in the figure. A monitor display unit 5, a switch 6a for switching an image, and a power switch 7 are provided on the mounting table 1 side below the vertical support unit 4. Further, the monitor display unit 5 is provided at the lower portion of the vertical support unit 4 with an inclination so that a user who is directly facing the mounting table 1 can easily see it. Further, the monitor display unit 5 is arranged so as to be at the same distance from the user as the mounting table 1. Further, the monitor display unit 5 using the liquid crystal television is provided at a position deep in the vertical support unit 4 by a distance of the eaves 5d so that the light flux from the light source does not become difficult to see, and the tilting is performed as described above. ing.

Reference numeral 10 denotes a switch member for adjusting the white balance of the camera 2, and when the switch member 10 is turned on, the white balance can be automatically adjusted. Further, by turning on the switch member 10, the white balance may be manually selected according to the type of external light, such as fluorescent light, daylight, incandescent lamp light, or the like.
Reference numeral 11 is an operation knob for sliding or fixing the vertical support portion 4. Reference numeral 12 denotes an external input terminal for inputting a video signal from the outside, and the external input input from the input terminal is output from the monitor display unit 5 and the monitor output terminal 13. Reference numeral 15 is a slide base, which will be described later, 16 is a vertical movement base, and 17 is a fixed base for fixing the mounting base 1.

Here, according to the present embodiment, the mounting table 1, the camera 2, the monitor 5
Are integrally fixed by a horizontal support portion 3 and a vertical support portion 4.

The above-described configuration is essentially the same as the cited conventional proposal example, and the duplication with the cited example is avoided to avoid a detailed description.
The pair of pins 8 is fixedly mounted on the up-and-down moving table 16 and also has a first
As shown in the drawing, which is a sectional view of the main part of FIG. 2 in the direction of arrow X, the guide groove 17a of the fixed base 17 is penetrated and integrated with the cover 4a of the vertical support portion 4.

In FIGS. 1 and 2, 18 is a pin 1 fixedly mounted on the up-and-down moving table 16.
It is a first lever that rotates around 9 and has an operation knob 11 fixedly attached to its tip, a pin 20 fixedly attached to the other end, and a second lever 22 pivotally supported. ing. At one end of the lever 22, a sack member 21 made of rubber or the like is fixedly mounted, and
It is pressed against 17, and a toggle mechanism is formed between the vertical moving table 16 and the fixed table 17. Reference numeral 23 is a tension coil spring, one end of which is locked by a pin 20 which is an intersection of the levers 18 and 22, and is biased in a direction in which a toggle angle formed between the levers 18 and 22 is widened. Reference numeral 24 is a guide pin for the lever 22 fixedly mounted on the up-and-down moving table 16. Reference numeral 25 denotes a lock lever which is guided by a pair of pins 26 fixedly mounted on the up-and-down moving table 16 and slides in the arrow X direction, and a lock portion 25a at the tip thereof is a member 29 fixedly mounted on the fixed table 17. Lock engagement between and. Reference numeral 27 denotes a biasing tension coil spring that constantly biases the lock lever 25 toward the member 29.

In addition, in the present embodiment, the member 29 is configured to be locked only when the vertical moving table 16 reaches the bottom dead center position. This is because, in the present lock mechanism composed of the levers 18 and 22, the vertical moving table 16 can be locked by a toggle mechanism with respect to the downward movement, but in the upward direction, both levers 18 can be locked. This is because the toggle angle formed by the keys 22 and 22 operates in the direction in which the toggle angle becomes narrower and cannot be locked.

Therefore, at the bottom dead center position of the up-and-down moving table 16, the second lock mechanism including the lever 25, the member 29, and the like brings about a complete lock state. Further, the reason why the lock is possible only at the bottom dead center position is for practical use. That is, the vertical movement for zooming the magnification does not need to be completely locked, and the completely locked is required for transportation or storage. In these cases, normally, since the up-and-down moving table 16 is kept in the state of being held at the bottom dead center position, only the bottom dead center position is configured to be completely locked. The lock may be configured to be completely locked in the position.

Reference numeral 28 denotes a spacer for providing a clearance between the vertical moving table 16 and the fixed table 17, which is fixed to the vertical moving table 16.

Further, in FIGS. 1 and 2, 30 is a microphone that is a voice input unit, and 31 is a detection switch.

FIG. 3 shows an electric circuit of the microphone section. SP is an external speaker, 32 is an amplifier, and R _{1 to} R ₄ are resistors. That is,
The output signal of the microphone 30 is amplified by the amplifier 32 via the resistors R ₁ and R ₂ and output to the external speaker SP. When the detection switch 31 between the resistors R ₁ and R ₂ is in the off state, the signal of the microphone 30 is input to the amplifier 32, but in the on state, it is in the grounded state, and the signal of the microphone 30 is input to the amplifier 32. Is not transmitted,
The speaker SP is configured to be in a silent state.

(Operation) In the above-described configuration, the horizontal movement of the electronic camera 2 in the direction of the arrow X is performed by the pair of pins 9 fixed to the up-and-down moving table 16,
It is performed by sliding between the long grooves 15c of the slide base 15. At this time, the cover 3a of the horizontal support portion 3 has the member 15
Since it is fixed to the slide base 15 together with the camera 2 by a and 15b, the camera 2 can be moved in the arrow X direction by moving the cover 3a.

Next, regarding the vertical movement in the arrow Z direction,
Is located at the bottom dead center position, the 16a part which is a part of the up-and-down moving table 16 and the operation knob 11 are grasped so as to be sandwiched by one hand (one hand), and the knob 11 is in the arrow a direction (Fig. 1). Rotate to. By this operation, the first lever 18 rotates, and the fulcrum 20 also moves in the a direction. Therefore, the second lever 22 is also pulled by the fulcrum 20 and follows the guide 24 in the arrow b direction (first
(Fig.), And the contact between the hood member 21 and the fixed base 17 is cut off. At the same time, the protruding portion 18a of the lever 18 pushes the lock lever 25 in the direction of arrow C (FIG. 1), and the member 29 and the lock portion
25a is disengaged, and in this state the up-and-down moving table 16 becomes free, and at the same time, the detection switch 31 is turned on.

Then, in this state, each pin 8 and guide groove 17a
When the up-and-down moving table 16 is moved upward by and the hand is released, the fulcrum 20 rotates in the direction opposite to the arrow a by the force of the spring 23, the first lever 18 returns to the initial position, and 2 The lever 22 moves along the guide 24, and the hood 21 is fixed on the base.
The vertical movement table 16 is prevented from dropping downward by the above-mentioned upsetting force by being pressed by 17. At the same time, the detection switch 31 turns off.

As described above, the up-and-down moving table 16, that is, the camera 2 can be moved up and down with one touch, and zooming can be performed easily.

Next, by the above operation, when the up-and-down moving table 16 is moved to the bottom dead center position and the hand is released, the levers 18 and 22 perform the above operation, and the lock lever 25 causes the spring 27 to move in the direction opposite to the arrow C direction. To engage the member 29. As a result, the up-and-down moving table 16 is completely locked, and the up-and-down moving table 16 is prevented from moving even when a large force or vibration is applied when the machine is moved or stored.

As described above, when the lock is released and the electronic camera 2 is moved up and down, the detection switch 31 is turned on, and the signal of the microphone 30 is grounded by the circuit shown in FIG.
The input to the amplifier 32 becomes zero, and the external speaker SP becomes silent. Therefore, a mechanical sound such as a lock / unlock or a moving sound of each member cannot be heard from the speaker SP.

Further, in the locked state, the detection switch 31 is turned off, so that the signal of the microphone 30 is amplified as it is and input to the speaker SP, and the voice of the speaker is transmitted as it is to the audience side together with the image.

Other Embodiments In the above embodiment, the timing for muting the microphone 30 is
Although the changeover switch 31 is used, the same effect can be obtained by detecting the movement of the support member by using a photo sensor, a magnetic sensor, or the like.

In addition, as an additional application example of the present invention, a video switch 6a
In conjunction with (FIG. 2), noise at the time of switching the switch may be eliminated.

(Advantages of the Invention) According to the configuration of the present invention, the detection unit that detects that the operation member that is operated to permit the movement of the support member is operated, and the detection unit detects the detection result according to the detection result of the detection unit. Since the control means for minimizing the output of the voice input section is provided, it is possible to reliably and easily detect that the operator is moving the support member, and to minimize the output of the voice input section during this period. You can Therefore, in this type of image reading apparatus, it is possible to block unpleasant noise when the photoelectric conversion unit (support member) is moved with a simple and low-cost structure.

[Brief description of drawings]

FIG. 1 is a schematic view of an image reading apparatus according to an embodiment of the present invention.
-A line enlarged sectional arrow view, FIG. 2 is the same whole perspective view, 3rd figure
The figure is an electric circuit diagram of the microphone unit. 1 ... Mounting table 2 ... Electronic camera (photoelectric conversion part) 3/4 ... Horizontal / vertical support part 30 ... Microphone (voice input part) 31 ... Detection switch

Claims (1)

[Claims] 1. A mounting table for mounting an image to be read, a photoelectric conversion unit for converting an optical image of the image to be read into an electric signal, a voice input unit, and a fixing unit provided on the mounting table. A supporting member movably supported by the fixing portion so that the photoelectric conversion unit can be moved so as to change its distance with respect to the mounting surface of the mounting table; and the photoelectric conversion unit is operated to permit movement of the supporting member. An operating member, a detecting unit that detects that the operating member is operated, and a control unit that minimizes the output of the voice input unit according to the detection result of the detecting unit. Image reading device.