JP5533998B2 - Document camera - Google Patents

Description

  The present invention relates to a document camera.

  Document cameras are devices that can capture documents and images, send data to a computer or projector, etc., and show them to many people at the same time. In recent years, document cameras have been used for classroom use in classrooms and conferences in conference rooms. It has begun to spread widely instead of OHP (see, for example, Patent Document 1 and Non-Patent Document 1).

Registered Utility Model No. 3122844

"DC-10s Document Camera", [online], Epson America Inc., [Searched on December 17, 2008], Internet <URL: http://www.epson.com/cgi-bin/Store/support/ supDetail.jsp? BV_UseBVCookie = yes & infoType = Doc & oid = 105288 & prodoid = 63075467 & category = Products>

  By the way, such a document camera is desired to have good portability so that the document camera can be easily moved between classrooms and between conference rooms.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a document camera that is more portable than a conventional document camera.

The document camera of the present invention has a first arm portion having a camera at the tip and a second arm portion supporting the first arm portion, and the first arm portion and the second arm portion can be folded. An arm,
A document camera having a storage concave portion for storing the arm portion in a folded state when not in use, and a main body portion having an operation portion,
When not in use, the arm portion is folded in such a manner that the first arm portion, the second arm portion, and the main body portion are Z-shaped, and is stored in the storage recess.
At the time of use, the arm portion is configured to be used by developing the first arm portion and the second arm portion so as to be in an inverted L shape ,
When the arm portion is folded and stored in the storage recess, the upper surface of the arm portion and the upper surface of the operation portion are configured to be substantially flush with each other.
It is characterized by.

For this reason, since the document camera of the present invention can store the folded arm portion in the storage recess of the main body when not in use, the product height when not in use and the product width are reduced. Since the document camera can be made narrower and more portable than the conventional document camera, and the unevenness on the upper surface of the document camera when not in use can be eliminated, the portability can be further improved.

(2) The document camera of the present invention is configured such that when the arm portion is folded and stored in the storage recess, the upper surface of the arm portion and the upper surface of the operation portion are substantially flush with each other. Is preferred.

  By adopting such a configuration, it is possible to eliminate unevenness on the upper surface of the document camera when not in use, so that the portability can be further improved.

(3) The document camera of the present invention preferably further includes a hook mechanism for fixing the arm portion to the storage recess when the arm portion is folded and stored in the storage recess.

  By adopting such a configuration, it is possible to fix the arm portion to the storage recess using the hook mechanism when not in use, so that the portability can be further improved.

(4) In the document camera of the present invention, the unfolded state of the arm portion is set in the connecting portion between the first arm portion and the second arm portion and the connecting portion between the second arm portion and the main body portion. A spring mechanism is preferably provided for maintenance.

  With such a configuration, the document camera of the present invention is used in a state where the first arm portion and the second arm portion are automatically deployed in an inverted L shape simply by performing an operation of expanding the arm portion. It becomes possible to do.

(5) In the document camera of the present invention, the second arm portion includes a second arm base end portion supported by the main body portion, and a second arm tip end located on the tip end side of the second arm base end portion. And the second arm portion can be expanded and contracted by sliding the second arm base end portion and the second arm distal end portion along the longitudinal direction of the second arm portion. It is preferable to be configured.

  By adopting such a configuration, the length of the second arm portion when not in use can be shortened, so that the length of the storage recess for storing the second arm portion can be shortened. As a result, the size of the document camera when not in use can be reduced, and the portability can be further improved.

(6) In the document camera of the present invention, the first arm portion is located on a first arm base end portion supported by the second arm portion, and a tip end side of the first arm base end portion, A first arm distal end portion having a camera, and the first arm distal end portion is supported on the first arm proximal end portion so as to be rotatable about a predetermined axis along a longitudinal direction of the first arm portion. In addition, it is preferable that the camera can be fixed at a rotational position where the optical axis of the camera is vertically downward and a rotational position where the optical axis of the camera is horizontal.

  With such a configuration, by rotating the tip of the first arm, it becomes possible to point the camera directly under the vertical direction or in the horizontal direction. Teachers, blackboards, students, classrooms, landscapes, etc.) In addition, it is possible to easily perform the operation of setting the camera directly below the vertical direction (actually the most frequently used state) and the operation of setting the camera to the horizontal direction. It becomes a document camera.

(7) In the document camera of the present invention, the first arm portion is located at a first arm base end portion supported by the second arm portion and a tip end portion of the first arm base end portion, Preferably, the camera has a first arm tip having a camera , and the camera is configured to be rotatable around the optical axis of the camera in the first arm tip.

  With such a configuration, it is possible to easily perform operations such as changing the vertical and horizontal directions of the captured image and correcting the inclination of the captured image, and the document camera is easy to use.

( 8 ) In the document camera of the present invention, the main body portion has a fall prevention stopper for preventing the document camera from falling when the arm portion is unfolded, and the fall prevention stopper is not used. It is sometimes preferable that the main body is configured so that it can be stored in a predetermined location.

By adopting such a configuration, the document camera will not fall over during use without having to increase the weight of the main body so much, making it possible to reduce the weight of the document camera and improving portability. can do. In the document camera of the present invention, the weight can be sufficiently reduced to 1 kg or less.
In the document camera of the present invention, when the fall prevention stopper is housed in a predetermined position of the main body when not in use, the portability is not impaired during carrying.

The figure shown in order to demonstrate the document camera 100 which concerns on embodiment. 6 is a six-sided view of the document camera 100 according to the embodiment. FIG. The top view of the main-body part 110. FIG. The bottom view of the 1st arm front-end | tip part 134. FIG. The figure shown in order to demonstrate operation when developing the document camera 100 which concerns on embodiment. The figure shown in order to demonstrate operation when developing the document camera 100 which concerns on embodiment. The figure shown in order to demonstrate operation which rotates the 1st arm front-end | tip part 134. FIG. The perspective view of the document camera 700 which concerns on the comparative example 1. FIG. The figure shown in order to demonstrate the document camera 800 which concerns on the comparative example 2. FIG. The figure shown in order to demonstrate the document camera 900 which concerns on the comparative example 3. FIG.

  The document camera of the present invention will be described below based on the embodiments shown in the drawings.

1. Configuration of Document Camera FIG. 1 is a diagram illustrating a document camera 100 according to the embodiment. FIG. 1A is a perspective view of the document camera 100 in a use state, and FIG. 1B is a perspective view of the document camera 100 in a non-use state.
FIG. 2 is a six-sided view of the document camera 100 according to the embodiment. 2A is a front view of the document camera 100, FIG. 2B is a rear view of the document camera 100, FIG. 2C is a left side view of the document camera 100, and FIG. ) Is a right side view of the document camera 100, FIG. 2E is a top view of the document camera 100, and FIG. 2F is a bottom view of the document camera 100.
FIG. 3 is a plan view of the main body 110.
FIG. 4 is a bottom view of the first arm tip portion 134.

  As shown in FIGS. 1 and 2, the document camera 100 according to the embodiment includes a first arm unit 130 having a camera at the tip and a second arm unit 120 that supports the first arm unit 130. An arm part that can fold the part 130 and the second arm part 120, and a main body part 110 having a storage recess 114 and an operation part 112 for storing the arm part in a folded state when not in use. When the document camera 100 according to the embodiment is not in use, the arm unit is folded in such a manner that the first arm unit 130, the second arm unit 120, and the main body unit 110 are Z-shaped and stored in the storage recess 114. In use, the arm portion is configured so as to be deployed and used so that the first arm portion 130 and the second arm portion 120 are in an inverted L shape.

  As shown in FIGS. 2C to 2F, the main body unit 100 further includes a fall prevention stopper 116 for preventing the document camera from overturning when the arm unit is unfolded. The fall prevention stopper 116 is configured to be housed in a predetermined position of the main body 110 when not in use. Further, as shown in FIG. 1, the main body unit 100 has USB connectors (USB A connector 118 and USB B connector 119) for connecting the document camera 100 to a projector, a personal computer, and other electronic devices.

  In the document camera 100 according to the embodiment, as shown in FIG. 3, the operation unit 112 includes a document camera switch 140, an autofocus switch 142, a zoom switch (zoom-in switch, zoom-out switch) 144, an LED light source switch 146, A source search switch 148 and a hook button 150 are arranged.

  In the document camera 100 according to the embodiment, as shown in FIG. 1B, when the arm portion is folded and stored in the storage recess 114, the upper surface of the arm portion and the upper surface of the operation unit 112 are substantially flush with each other. It is configured as follows.

  The document camera 100 according to the embodiment further includes a hook mechanism (not shown) for fixing the arm portion to the storage recess 114 when the arm portion is folded and stored in the storage recess 114.

  In the document camera 100 according to the embodiment, the unfolded state of the arm portion is maintained at the connecting portion between the first arm portion 130 and the second arm portion 120 and the connecting portion between the second arm portion 120 and the main body portion 110. A spring mechanism (not shown) is provided.

  In the document camera 100 according to the embodiment, as shown in FIG. 1A, the second arm part 120 includes a second arm base end part 122 supported by the main body part 110 and a second arm base end part 122. A second arm distal end portion 124 located on the distal end side of the second arm portion 120, and the second arm proximal end portion 122 and the second arm distal end portion 124 are slid along the longitudinal direction of the second arm portion 120. The two-arm portion 120 is configured to be extendable (see FIGS. 5C and 6A described later).

  In the document camera 100 according to the embodiment, as shown in FIG. 1A, the first arm portion 130 includes a first arm base end portion 132 supported by the second arm portion 120 and a first arm base end. And a first arm tip 134 having a camera 136 (see FIG. 4). The first arm tip 134 is a first arm as shown in FIG. 7 to be described later. Rotating position in which the optical axis of the camera 136 is vertically downward and the optical axis of the camera are horizontal, while being supported by the first arm base end portion 132 so as to be rotatable about a predetermined axis along the longitudinal direction of the portion 130. It is configured to be able to be fixed at the rotational position in the direction.

  In the document camera 100 according to the embodiment, the first arm distal end portion 134 includes a camera 136 (only a lens portion is illustrated) and LED light sources 138 disposed on both sides of the camera 136, as shown in FIG. . The camera 136 has, for example, a 2 million pixel CCD or CMOS image sensor and a lens. Further, it has an autofocus function and a zoom function, and is turned on by the document camera switch 140 in the operation unit 112, is autofocused by the autofocus switch 142, and is zoomed in or out by a zoom switch (zoom-in switch, zoom-out switch) 144 It is configured to zoom out.

  In the document camera 100 according to the embodiment, as shown in FIG. 4, the camera 136 is configured to be rotatable around the optical axis of the camera 136 in the first arm distal end portion 134 (see FIG. 4). (See arrow in 4).

  In the document camera 100 according to the embodiment, as shown in FIG. 6, which will be described later, when used, an arm portion deployed in an inverted L shape is arranged around a predetermined axis along the longitudinal direction of the second arm portion 120. The storage recess 114 is rotated by 90 ° and used.

2. Method for Using Document Camera FIGS. 5 and 6 are diagrams for explaining an operation when the document camera 100 according to the embodiment is expanded. FIG. 5A is a perspective view showing the document camera 100 when not in use, FIG. 5B is a perspective view showing the document camera 100 in a state where the arm portion is being unfolded, and FIG. FIG. 6A is a perspective view showing the document camera 100 in a state where the arm portion is fully deployed, FIG. 6A is a perspective view showing the document camera 100 in a state where the second arm portion is extended, and FIG. FIG. 6 is a perspective view showing the document camera 100 in a state where the arm portion is rotated 90 ° toward the storage recess 114 around a predetermined axis along the longitudinal direction of the second arm portion 120.

  FIG. 7 is a view for explaining the operation of rotating the first arm distal end portion 134. FIG. 7A is a perspective view of the document camera 100 when the first arm tip 134 is rotated and the camera is directed directly below the vertical direction, and FIG. 7B is a diagram illustrating the first arm tip 134 rotated. FIG. 7C is a perspective view of the document camera 100 when the camera is directed forward in the horizontal direction (such as when shooting a teacher or a blackboard), and FIG. FIG. 3 is a perspective view of the document camera 100 when facing backward (when photographing a student or a classroom).

(1) Installation of Document Camera First, the document camera 100 is placed on a desk as shown in FIG.
Next, the arm portion is lifted from the storage recess 114 while pressing the hook button 150, and then the arm portion is unfolded as shown in FIGS. 5 (b) and 5 (c). The arm part and the main body part 110 are Z-shaped during deployment, and the arm part is inverted L-shaped after completion of deployment.
Next, as shown in FIGS. 5 (c) and 6 (a), after extending the arm portion, as shown in FIGS. 6 (a) and 6 (b), the arm portion is moved to the second arm portion. It is rotated 90 ° around the predetermined axis along the longitudinal direction of 120 toward the storage recess 114.
Next, the document camera 100 is connected to a projector (not shown) prepared in advance using a USB cable.
As a result, the document camera 100 can be used.

(2) Shooting a document with a document camera First, turn on the projector. Then, power is supplied to the document camera 100 via the USB cable.
Next, the document camera switch 140 is turned on. Then, the power of the document camera 100 is turned on.
Next, a document to be photographed is installed, and then the camera 136 of the document camera 100 is fixed at a rotational position in which the optical axis of the camera 136 is directed downward in the vertical direction.
Next, while confirming the image of the document displayed on the screen, the document is arranged at the correct position and angle. At that time, an autofocus switch 142 and a zoom switch (zoom-in switch or zoom-out switch) 144 are used as necessary.
As a result, a desired document is correctly displayed on the screen. Thereafter, the use of the document camera is continued while changing the object to be photographed as necessary. At this time, if the object to be imaged is a teacher, a blackboard, a student, a classroom, etc., the first arm tip 134 is appropriately rotated to perform imaging at an optimal rotational position.

(3) Cleaning up the document camera Cleaning up the document camera is performed in the reverse order of the above-described “installation of the document camera”.
That is, first, the document camera switch 140 is pressed to turn off the document camera 100, and then the USB cable is disconnected from the document camera 100.
Next, as shown in FIGS. 6B and 6A, the arm portion is rotated by −90 ° around the predetermined axis along the longitudinal direction of the second arm portion 120 toward the storage recess 114. Thereafter, as shown in FIGS. 6A and 5C, the arm portion is contracted.
Next, the arm part is folded. When the arm portion is completely folded, the hook mechanism works and the arm portion is fixed to the storage recess 114. At this time, the upper surface of the arm unit and the upper surface of the operation unit 112 are substantially flush.
Thereby, the work of cleaning up the document camera 100 is completed. Accordingly, it is possible to easily place the document camera 100 in a predetermined storage location or carry it to the adjacent classroom after the lapse.

3. Effects of Document Camera According to the document camera 100 according to the embodiment described above, the arm unit and the main body unit 110 are provided as described above, and when not in use, the arm unit is divided into the first arm unit 130 and the second arm. The portion 120 and the main body portion 110 are folded so as to be Z-shaped and stored in the storage recess 114, and when used, the first arm portion 130 and the second arm portion 120 are inverted L-shaped when used. Thus, the folded arm portion can be stored in the storage recess 114 of the main body 110 when not in use. As a result, the document camera 100 according to the embodiment can have a lower product height when not in use and a smaller product width, and is a document camera that is more portable than a conventional document camera.

  Further, according to the document camera 100 according to the embodiment, when the arm unit is folded and stored in the storage recess 114, the upper surface of the arm unit and the upper surface of the operation unit 112 are configured to be substantially flush with each other. Unevenness on the upper surface of the document camera when not in use can be eliminated, and the portability can be improved.

  The document camera 100 according to the embodiment further includes a hook mechanism for fixing the arm portion to the storage recess 114 when the arm portion is folded and stored in the storage recess 114. It is possible to fix the arm portion to the storage recess 114 by using it, and the portability can be further improved.

  Further, according to the document camera 100 according to the embodiment, the connecting portion between the first arm portion 130 and the second arm portion 120 and the connecting portion between the second arm portion 120 and the main body portion 110 are in the unfolded state of the arm portion. Since the spring mechanism for maintaining the position is provided, the first arm portion 130 and the second arm portion 120 are automatically deployed in an inverted L shape simply by performing an operation of expanding the arm portion. It becomes possible to use a document camera.

  Further, according to the document camera 100 according to the embodiment, the second arm part 120 includes the second arm base end part 122 supported by the main body part 110 and the second arm base end part 122 positioned on the front end side of the second arm base end part 122. The second arm portion can be expanded and contracted by sliding the second arm proximal end portion 122 and the second arm distal end portion 124 along the longitudinal direction of the second arm portion. Therefore, the length of the second arm portion when not in use can be shortened, and the length of the storage recess 114 for storing the second arm portion can be shortened. It is possible to reduce the size of the document camera at the time and further improve the portability.

  Further, according to the document camera 100 according to the embodiment, the first arm portion 130 is positioned on the first arm base end portion 132 supported by the second arm portion 120 and the front end side of the first arm base end portion 132. And a first arm distal end portion 134 having a camera 136, the first arm distal end portion 134 being rotatable about a predetermined axis along the longitudinal direction of the first arm portion. The first arm is configured to be fixed at a rotational position where the optical axis of the camera 136 is vertically downward and a rotational position where the optical axis of the camera is horizontal. By rotating the distal end portion 134, the camera 136 can be directed vertically downward or horizontally, and an object to be photographed other than the document on the desk (for example, teacher, blackboard, student, classroom, scene) Etc..) It is possible to correctly shoot. In addition, it is possible to easily perform a task of setting the camera 136 to a state directly below the vertical direction (a state in which the camera is most frequently used in practice) and a task of setting the camera to a horizontal direction. A good document camera.

  Further, according to the document camera 100 according to the embodiment, the camera 136 is configured to be rotatable around the optical axis of the camera 136 in the first arm distal end portion 134. It is possible to easily change the image and correct the tilt of the captured image, and the document camera is easy to use.

  Further, according to the document camera 100 according to the embodiment, when used, the arm portion that is developed in an inverted L shape is placed on the side of the storage recess 114 around a predetermined axis along the longitudinal direction of the second arm portion 120. Since it is configured to be used after being rotated by 90 °, it becomes possible to place a document on the side of the main body 110 and to effectively use the space on the desk.

  Further, according to the document camera 100 according to the embodiment, the main body unit 110 includes the fall prevention stopper 116 for preventing the document camera from falling when the arm unit is unfolded. Since it is configured so that it can be stored in a predetermined position of the main body during use, the document camera does not fall over during use without increasing the weight of the main body. For this reason, it becomes possible to further reduce the weight of the document camera and further improve the portability. In the document camera 100 according to the embodiment, when the fall prevention stopper 116 is housed in a predetermined position of the main body 110 when not in use, the portability is not impaired during carrying.

  Hereinafter, the effects of the document camera 100 according to the embodiment will be described with reference to the problems of the document cameras 700, 800, and 900 according to the comparative examples.

FIG. 8 is a perspective view of the document camera 700 according to the first comparative example.
FIG. 9 is a diagram for explaining the document camera 800 according to the second comparative example. FIG. 9A to FIG. 9E are views showing the state of the document camera 800 when the arm portion is expanded.
FIG. 10 is a view for explaining the document camera 900 according to the third comparative example. FIG. 10A to FIG. 10C are views showing the state of the document camera 900 when the arm portion is unfolded.

  A document camera 700 according to Comparative Example 1 is a document camera described in Patent Document 1. As shown in FIG. 8, the document camera 700 according to the comparative example 1 is difficult to fold small when not in use due to the use of a gooseneck arm 720 having a high degree of freedom of folding. There is a problem that is not good. In the document camera 700 according to the comparative example 1, it is not easy to reduce the weight of the main body 710 from the viewpoint of ensuring the operability of the arm and preventing the fall (weight: 2.4 kg). There is a problem that portability is not good. In addition, the document camera 700 according to the comparative example 1 has an advantage that the posture of the arm can be freely changed by the gooseneck arm 720, but there is too much freedom regarding the posture of the arm, and the camera 730 is moved in the vertical direction. There is a problem in that it is not easy to perform the operation of setting the camera directly downward (the state where it is most frequently used in practice) or setting the camera in the horizontal direction.

  The document camera 800 according to the comparative example 2 is a conventional document camera. As shown in FIG. 9, the document camera 800 according to the comparative example 2 is configured so that the folded arm portions 820 and 830 are arranged as they are on the main body portion 810 when not in use. The product height at the time becomes high, and although not as high as the document camera 700 according to the comparative example 1, there is a problem that the portability is not good. Further, the document camera 800 according to the comparative example 2 is lighter than the document camera according to the comparative example 1, but still has a weight of about 1.2 kg, and is not as large as the document camera 700 according to the comparative example 1, but has high portability. There is no problem. In addition, the document camera 800 according to the comparative example 2 cannot capture the camera in the horizontal direction, and is a subject to be photographed other than the document on the desk (for example, teacher, blackboard, student, classroom, scenery, etc.). Since the camera cannot be photographed correctly, there is a problem that it is not easy to use.

  A document camera 900 according to Comparative Example 3 is the document camera described in Non-Patent Document 1. As shown in FIG. 10, the document camera 900 according to the comparative example 3 is configured so that the folded arm portions 920 and 930 are arranged beside the main body portion 910 when not in use. There is a problem that the width becomes wider and the portability is not as good as that of the document camera 700 according to the comparative example 1. Further, the document camera 900 according to the comparative example 3 has a problem that the weight is about 2.4 kg and the portability is not good. In addition, the document camera 900 according to the comparative example 3 can turn the camera unit 940 to turn the camera directly below the vertical direction or horizontally, but at that time, the camera unit 940 is rotated. There are too many degrees of freedom, and it is not easy to set up the camera directly below the vertical direction or set the camera up horizontally. There is.

  On the other hand, as described above, the document camera 100 according to the embodiment is more portable than the document cameras 700, 800, 900 according to the comparative examples, and further, the document camera 700, according to each comparative example. The document camera is easy to use because it can be installed and used with a simpler operation than 800,900.

  The document camera of the present invention has been described based on the above embodiment, but the present invention is not limited to the above embodiment. The present invention can be implemented in various modes without departing from the gist thereof, and for example, the following modifications are possible.

(1) In the above embodiment, in use, the arm portion developed in an inverted L shape is rotated 90 ° around the predetermined axis along the longitudinal direction of the second arm portion 120 toward the storage recess 114. However, the present invention is not limited to this. For example, it is good also as using as it is, without rotating the arm part expand | deployed by reverse L shape. In this case, a mechanism for rotating the arm portion around a predetermined axis along the longitudinal direction of the second arm portion 120 can be omitted from the document camera.

(2) In the above embodiment, the second arm portion having the second arm base end portion 122 and the second arm distal end portion 124 and extending and retracting is used, but the present invention is not limited to this. . For example, the 2nd arm part which does not expand-contract can also be used.

(3) In the above embodiment, the example in which the document camera is connected to the projector has been shown, but the present invention is not limited to this. For example, a document camera may be connected to a personal computer. In this case, the document image is displayed on another projector or other display device connected to the personal computer.

(4) In the above embodiment, an example in which the document camera is connected to the projector using the USB cable has been described, but the present invention is not limited to this. For example, the document camera may be connected to a projector, a personal computer, or a network using a video composite cable, a DVI cable, an HDMI cable, a network cable, and a wireless interface.

100, 700, 800, 900 ... document camera, 110, 710, 810, 910 ... main body, 112, 812 ... operation part, 114 ... storage recess, 116 ... anti-tip stopper, 118 ... USB A connector, 119 ... USB B Connector, 120, 820, 920 ... second arm portion, 122 ... second arm proximal end portion, 124 ... second arm distal end portion, 130, 830, 930 ... first arm portion, 132 ... first arm proximal end portion, 134: First arm tip portion, 136: Camera, 138: LED light source, 140: Document camera switch, 142: Auto focus switch, 144: Zoom switch (zoom-in switch, zoom-out switch), 146 ... LED light source switch, 148 ... Source search switch, 150 ... hook button, 720 ... arm, 730, 840, 940 ... Camera unit

Claims (7)

An arm part having a first arm part having a camera at the tip and a second arm part supporting the first arm part, the arm part capable of folding the first arm part and the second arm part;
A document camera having a storage concave portion for storing the arm portion in a folded state when not in use, and a main body portion having an operation portion,
When not in use, the arm portion is folded in such a manner that the first arm portion, the second arm portion, and the main body portion are Z-shaped, and is stored in the storage recess.
At the time of use, the arm portion is configured to be used by developing the first arm portion and the second arm portion so as to be in an inverted L shape,
A document camera, wherein the upper surface of the arm unit and the upper surface of the operation unit are substantially flush with each other when the arm unit is folded and stored in the storage recess. The document camera according to claim 1,
The document camera further comprising a hook mechanism for fixing the arm portion to the storage recess when the arm portion is folded and stored in the storage recess. The document camera according to claim 1 or 2,
The connecting portion between the first arm portion and the second arm portion and the connecting portion between the second arm portion and the main body portion are provided with a spring mechanism for maintaining the unfolded state of the arm portion. A document camera characterized by The document camera according to any one of claims 1 to 3,
The second arm portion has a second arm base end portion supported by the main body portion, and a second arm tip end portion located on the tip end side of the second arm base end portion,
The second arm portion is configured to be stretchable by sliding the second arm base end portion and the second arm distal end portion along the longitudinal direction of the second arm portion. Characteristic document camera. The document camera according to any one of claims 1 to 4 ,
The first arm portion includes a first arm base end portion supported by the second arm portion, and a first arm front end portion that is located at a front end portion of the first arm base end portion and has the camera. And
The distal end portion of the first arm is supported by the first arm base end portion so as to be rotatable about a predetermined axis along the longitudinal direction of the first arm portion, and the optical axis of the camera is directed vertically downward. A document camera characterized in that it can be fixed at a rotational position where the optical axis of the camera becomes a rotational position where the optical axis of the camera is in a horizontal direction. In the document camera in any one of Claims 1-5,
The first arm portion includes a first arm base end portion supported by the second arm portion, and a first arm front end portion that is located at a front end portion of the first arm base end portion and has the camera. And
The document camera according to claim 1, wherein the camera is configured to be rotatable around an optical axis of the camera in a tip portion of the first arm. In the document camera in any one of Claims 1-6 ,
The main body has a fall prevention stopper for preventing the document camera from falling when the arm is unfolded,
The document camera according to claim 1, wherein the fall prevention stopper is configured to be housed in a predetermined portion of the main body when not in use.

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