JPH0858287A - Board for education with angle-adjusting means - Google Patents

Abstract

PURPOSE: To provide an educational board having an angle adjusting means for adjusting an angle of the board mainly provided on a front surface of a classroom, a lecture room or the like in a longitudinal direction to a student. CONSTITUTION: The educational board having an angle adjusting means comprises a board member 100 of a plate-like state having a predetermined thickness, an outer profile frame 200 provided at an outer peripheral edge of the member 100, a support frame 300 for supporting the frame 200 by a fulcrum 400, and the angle adjusting means 500 for adjusting the angle in a longitudinal direction to a student.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an educational board provided in a school or a lecture room, and more particularly to an educational board having a device for adjusting a longitudinal angle.

[0002]

2. Description of the Related Art Educational boards are provided for educational assistance in schools and various lecture rooms and the like.
A bulletin board for posting memos and sheet-like educational members and the like, and a screen for education using a phantom light or a projector such as a so-called OHP correspond to this. These educational boards, etc. are usually installed in the front of the classroom, but they can be fixed on the wall, slidable to the left or right guided by a fixed frame, or hinged. There is an open-close type that can be rotated in the lateral direction. If the above-mentioned fixed type is relatively long to the left and right, the characters written on the sides of the board are hard to use due to the reflection of light or students depending on the viewing angle, so that both sides of the blackboard are hard to use. It is not at the moment.

On the other hand, in the case of a so-called open / close type blackboard including a slide type and a rotary type, the slide type board is moved to the left and right, or the rotary type board is rotated to move to the optimum position for the student. It has the advantage of being able to give a lecture in a given state. However, the conventional educational board and the like cannot adjust the angle of the student in the front-back direction. Therefore,
Depending on the lighting in the attending room, light may be reflected on a part of the educational board and the contents may not be grasped.

If the educational board is not at a right angle to the student's field of view, the distance between the upper and lower parts and the student is different. In some cases, the effect of education may be diminished due to the fact that it is not correctly recognized due to the difference in size due to perspective. Such a phenomenon is particularly remarkable in the case of a screen on which an image is displayed at the time of video education using a phantom lamp such as an OHP or a projector. In other words, there are inconveniences such as inducing an illusion phenomenon due to image distortion and imbalance.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an educational board having angle adjusting means for adjusting the angle of the educational board in the front-rear direction with respect to a student. It is another object of the present invention to provide an educational board in which the angle of the educational board is adjusted in the front-rear direction so that the student can correctly see the shape such as the figure formed on the surface.

[0006]

In order to achieve the above object, an educational board having an angle adjusting means of the present invention is an educational board in which a board member is supported by left and right fulcrums provided on a support frame. There is provided an angle adjusting means for changing the angle between the board member and the support frame around the fulcrum.

The fulcrum is preferably provided below the center of the support frame in the vertical direction.

The angle adjusting means is an internal gear which is fixed to the side surface of the board member and has a gear on the inner periphery thereof, and an internal gear which is fixed to the inside of the side surface of the support frame and has a gear on the outer periphery thereof. An external gear, a communication hole provided at the center of the external gear, a shaft that penetrates the support frame and the external gear, and has its tip pivotally supported by the board member to form the fulcrum, An eccentric shaft that is integrally provided with the shaft and has a rotation shaft that is eccentric to the rotation shaft of the shaft and that is rotatably inserted into the communication hole; and a knob that is coupled to an end of the shaft on the support frame side. The inner gear has an inner diameter larger than the outer diameter of the outer gear, has more teeth than the number of teeth of the outer gear, and meshes with the outer gear.

Further, the angle adjusting means includes a plurality of recesses provided on one of the board member and the support frame and provided on a circle centered on the fulcrum, and a case member provided on the other side. It is characterized by comprising an engaging member provided in the case member for engaging with the concave portion, and a spring for biasing the engaging member toward the concave portion.

A frame body may be provided for guiding the support frame so that the support frame can move left and right.

The board member may be selected according to various educational purposes, such as a blackboard for whiteboard, a whiteboard, a bulletin board, or a screen board for video education.

Further, it is preferable to provide a rotatable board member that is rotated by an axis provided in front of the moving position of the support frame of the frame body.

[0013]

In the educational board of the present invention, the angle of the board member is changed by the angle adjusting means about the left and right fulcrums provided on the support frame.

By providing the fulcrum below the center of the support frame in the vertical direction, when the upper end of the board member is tilted toward the student, the lower end is retracted to the inside of the frame body. Since the width of the board member becomes smaller, the angle at which the board member is adjusted becomes larger.

When the angle adjusting means is of a gear meshing type utilizing the external gear and the internal gear, turning the knob causes the shaft connected thereto to rotate. The internal gear that is rotatably fitted to the gears eccentrically moves. Only the gears on the line connecting the center of the shaft to the center of the eccentric shaft mesh with the external gear and the internal gear, and the other gears are disengaged as they move away from the meshing position. The eccentric movement causes the outer gear to move around the outer gear while the mesh between the external gear and the internal gear is gradually shifted. This allows
Although a rotational force is generated between the two gears, since the external gear is fixed to the support frame, the external gear rotates together with the board member to which the internal gear is fixed.

When the angle adjusting means uses a plurality of recesses provided on a circle centered on the fulcrum and engaging members that engage with the recesses, the upper and lower ends of the board member are pressed. Then, the engaging member disengages from the previously engaged concave portion and moves to another concave portion, but because the spring biasing the engaging member engages the other concave portion, The angle of the board member can be changed and the state is maintained.

Further, by providing a frame for guiding the support frame movably left and right, the board member supported by the support frame can be moved left and right.

By using the board member as a blackboard for whiteboard, a whiteboard, a bulletin board, or a screen board for video education, it can be used for various educational purposes.

Further, when a rotatable board member is provided which is rotated by an axis provided in front of the moving position of the support frame of the frame body, the front surface or the back surface thereof is rotated by rotating the board member as required. Is displayed to students.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the educational board of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing an embodiment of an educational board of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is a board member. 6 is an explanatory view when the angle of 100 is changed, FIG. 5 is an explanatory sectional view showing an embodiment of the gear meshing type angle adjusting means 500, FIG.
Is an explanatory view showing the relationship between each gear of the gear meshing type angle adjusting means 500 and the shaft and the eccentric shaft, FIG. 7 is an explanatory view showing the operation of the gear meshing type angle adjusting means 500, and FIG. FIG. 9 is an enlarged view, FIG. 9 is a sectional view showing an embodiment of the angle adjusting means 500 using the stop ball 560, and FIG. 10 is an explanatory view showing a plate 570 of the angle adjusting means 500 using the stop ball 560.

First, as shown in FIG. 1, the educational board of this embodiment is provided with a fixed board member 30 on the center surface of the frame body 10 and an educational board having angle adjusting means on both sides thereof. A board member 100a for which the angle adjustment is not performed is provided movably to the left and right, and a rotatable board 20 is provided at the front of these boards so as to be rotatable by a hinge 21.

The educational board having the angle adjusting means has a board member 100 having a constant thickness, an outer frame 200 provided on the outer peripheral edge of the board member 100, and a fulcrum 400 of the outer frame 200. Support frame 30 supported by
0, and angle adjusting means 500 for adjusting the angle of the board member 100 in the front-rear direction with respect to the student.

The board member 100 is a plate-like member having a certain thickness, and is an educational member which is provided in a lecture room or the like and displays various kinds of displays for lectures on its surface. This board member 100 displays an image by using a blackboard that normally performs blackboard writing with a chalk, a whiteboard that writes with a pen, a bulletin board for posting memos or printed educational materials, and a phantom lamp or projector such as a so-called OHP. It is used in lectures in various lecture rooms and schools such as screen boards for video education.

The outer frame 200 is a protective frame provided on the outer peripheral edge of the board member 100, and is supported inside the support frame 300.

The support frame 300 is formed to be slightly larger than the outer frame 200 using square members having the same cross section and provided on a wall surface of a lecture room or the like. Alternatively, the lower end of the support frame 300 may be supported by supporting legs (not shown). Good.

In this embodiment, as shown in FIGS. 1 and 2, a board member 100 is formed as a so-called sliding door type which can be moved to the left and right mainly in a frame 10 fixed to the front wall of the lecture room. A guide groove 11 is provided inside the upper end of the frame body 10, and a guide roller 31 is provided on the bottom surface of the support frame 300 so that the board member 100 can move more smoothly. In addition to the sliding door type board member 100 which is moved to the left and right, the frame body 10 has a rotatable board member 20 which is turned around a hinge 21 and a fixed member which is fixed to the surface of the frame body 10. An expression board member 30 is provided.

In this case, different educational boards can be used for the sliding door board member 100, the rotatable board member 20, and the fixed board member 30. For example, an OHP screen is used for the sliding door board member 100, a blackboard is used for the fixed board member 30, a bulletin board is used for one of the rotatable board members 20, and a white board is used for the other board member. If selected and used, the effect of education can be further enhanced.

An important structural feature in the embodiment is that the board member 100 is adjusted to a desired angle of the student. That is, the fulcrum 4 is provided on one side in the left-right direction of the outer frame 200 and the support frame 300 provided on the outer peripheral edge of the board member 100.
00, and the fulcrum 400 is provided rotatably about an axis,
On the other side, an angle adjusting means 500 for adjusting the board member 100 to an arbitrary angle is provided at a center position corresponding to the fulcrum 400.

Next, the gear adjusting type angle adjusting means 500
Will be described. Gear meshing type angle adjusting means 500
As shown in FIGS. 5 to 8, the external gear 510 is fixed to the support frame 300, and the external frame 200 is provided with an internal gear 512 having a larger number of teeth than the external diameter of the external gear 510. The eccentric shaft 540 is meshed with the gear 510, and an eccentric shaft 540 is formed at an intermediate portion of the shaft 530 to penetrate the support frame 300 and the outer frame 200.
The end of the shaft 530 is pivotally supported by a boss hole 513 provided in the internal gear 512, and
0 is freely set.

The external gear 510 is fixed to the support frame 300 by screws or welding, and the internal gear 512 is similarly fixed to the outer frame 200. A knob 550 is coupled to the tip of the shaft 530, and the shaft 530 is integrally eccentric about the center of the eccentric shaft 540 by artificially rotating the knob 550 outside the support frame 300. The internal gear 512, which is driven and is rotatably fitted to this, is eccentrically driven. At this time, the support frame 300 and the outer frame 20
The external gear 510 is formed of a plate so that the gear portion protrudes outward in order to reduce the interval of 0, and the internal gear 512 presses the plate to form a recess and protrudes to the inner periphery thereof. Is provided. As a result, as shown in FIG. 5, the external gear 510 is moved to the internal gear 5 in the state where the respective plate materials are fitted together.
It is installed in 12 and meshes.

At this time, the external gear 510 and the internal gear 512
Is configured to have at least a larger difference in eccentricity between the shaft 530 and the eccentric shaft 540. As shown in FIG. 6, when one gear (upper part in the drawing) meshes with the other gear, the other ( It is important that the lower part of the drawing is configured so that the two gears do not mesh completely.

Next, the angle adjusting means 5 by a gear meshing system
The operation of No. 00 will be described with reference to FIGS.

S is the center of the shaft 530 and S'is the center of the eccentric shaft 540. The number of teeth of the external gear 510 is
Since the number of teeth of the internal gear 512 is smaller than that of the internal gear 512, when the knob 550 is not turned, only the gear A on the extension of the line connecting S to S 'is completely meshed as shown in FIG. Further, the other gears are not completely meshed, and the meshing shifts away from the meshing position. Here, when the knob 550 is turned by the angle α, S moves eccentrically about S ′ as an axis, so S moves to Sα as shown in FIG. 7, and the gear meshing position connects Sα to S ′. It becomes position B on the line. Thus, the meshing position of the gear moves on the circumference of the external gear 510 with the circular movement of S. As a result, the gears that are not completely meshed with each other before the rotation of the knob 550 are meshed with each other, so that a rotational force is generated between both gears, but the external gear 510 is fixed and rotates. Therefore, the internal gear 512 and the board member 100 integrated with the internal gear 512 rotate.
Therefore, turning the knob 550 causes the board member 100 to rotate.
Can be adjusted. Then, if the knob 550 is operated in the opposite direction, the rotated board member 10
0 returns to the original angle.

When the angle is adjusted by operating the knob 550, the internal gear 512 and the external gear 510 are adjusted.
As a result, the angle does not easily change even when an external force acts on the board member 100. In order to change the angle of the board member 100 by an external force, the board member 100 must be eccentrically moved to change the meshing of the external gear 510 and the internal gear 512. This is because it is difficult due to the sliding resistance of the shaft 530 and the eccentric shaft 540. Therefore, according to the present embodiment, the angle of the board member 100 can be changed only by the knob 550.

As described above, by adjusting the angle of the board member 100 in the front-back direction with respect to the student by operating the knob 550, for example, in the case where the content displayed on the surface is a particularly important image screen, Can be displayed correctly so that the students can recognize it correctly.

As shown in FIG. 4, the fulcrum 400 which is the center of rotation of the board member 100 and the shaft 530
It is preferable that the installation position of is set lower than the middle of the entire height. On the contrary, when the upper end of the board member 100 is tilted to the side of the student, the lower end of the board member 100 retreats toward the inner side of the frame body 10. Therefore, in order to increase the angle adjustment range of the board member 100, This is because it is necessary to reduce the width at which the lower end of 100 retreats toward the frame 10. As described above, according to the angle adjusting means 500 of the present embodiment, the user turns the knob 550 in a desired direction, and the board member 100
Can be freely adjusted to any position with a small force.

Next, another embodiment of the angle adjusting means 500 according to the present invention will be described. In this embodiment, as shown in FIGS. 9 and 10, a stop ball 560, which is an engaging member internally provided in a case member 561 fixed to the outer frame 200 and biased by a spring 561, is made of metal. The plate 570 is configured to engage with holes 571 that are formed at regular intervals on a circle around the fulcrum 400.

Accordingly, this board member 100 is
When the stop ball 560 is stopped at a position where the stop ball 560 engages with the hole 571 when it is rotated about the fulcrum 400 together with 00, the angle adjusted state can be maintained. At this time, since the adjustment angle of the board member 100 is determined by the interval between the holes 571, it is preferable to provide the interval as small as possible so that the angle can be adjusted as finely as possible. Further, since the board member 100 is not tilted at 45 ° or more, the hole 571 may be provided only within the range between 90 ° in the vertical state and 45 ° in consideration of this range. In this embodiment, the stop ball 560 urged by the spring 561 is fixed to the outer frame 200 with screws 515 while being covered with the case member 561, and the holes 571 are fixed to the support frame 300 with screws. Although it is provided in the 570, the plate 570 may be fixed to the outer frame 200 by providing the spring 561 and the stop ball 560 in the opposite position, that is, the position of the support frame 300 by the case member 561. As described above, in the case of the angle adjusting method using the stop ball 560, the angle can be adjusted only at the position where the hole 571 is provided, so that the angle to be adjusted is smaller than that in the stepless angle adjusting method obtained in the gear meshing method. Because of the limitation, the gear meshing type continuously variable adjusting means is more preferable.

Although not shown, as another embodiment of the angle adjusting means according to the present invention, apart from a stepless gear meshing method by eccentric drive and an adjusting method by a stop ball,
By appropriately providing a frictional force between the support frame and the outer frame, it is possible to maintain the state where the angle is adjusted around the fulcrum. However, in this case, the frictional force may be reduced due to repeated use or the like. Therefore, it is more preferable to use the gear meshing method described above.

[0041]

According to the educational board having the angle adjusting means of the present invention, the angle of the board member necessary for education can be freely adjusted in the front-rear direction, and the blackboard is directed to a desired angle of the student. Therefore, the effects of various kinds of education can be further increased.

When the fulcrum is provided below the center of the support frame in the vertical direction, the angle at which the board member is adjusted becomes large, so that it is possible to deal with more situations of use.

Further, when the angle adjusting means is a gear mesh type, the angle of the board member can be adjusted steplessly by rotating the knob.

Further, the angle of the board member can be adjusted by using a stop ball type of the angle adjusting means.

Further, the educational board of the present invention includes various blackboards for writing on a board, a bulletin board for posting memos or sheet-like contents on which educational contents are described, a whiteboard for writing with a pen, an OHP, or the like. It can be appropriately selected and implemented according to the purpose of education, such as a screen plate for forming an image of a phantom lamp and a projector.

When a rotatable board member is provided which is rotatable by a shaft provided in front of the support frame moving position of the frame, by rotating the board member, the front surface or the back surface can be taken as required. Can be displayed to others,
The area for displaying educational contents will increase. Further, by using a board member having different functions on the front surface and the back surface of the rotatable board member, selection according to various educational purposes can be made.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an educational board having an angle adjusting means of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an explanatory view when the angle of the board member 100 is changed.

FIG. 5 is an explanatory sectional view of an angle adjusting means based on a gear meshing method.

FIG. 6 is an explanatory view showing a relationship between each gear of the angle adjusting means by a gear meshing method, a shaft, and an eccentric shaft.

FIG. 7 is an explanatory view showing the operation of the angle adjusting means by a gear meshing method.

FIG. 8 is an enlarged view of a gear meshing portion of the angle adjusting means by a gear meshing method.

FIG. 9 is an explanatory sectional view of an angle adjusting means using a stop ball.

FIG. 10 is an explanatory view showing a plate member of an angle adjusting means using a stop ball.

[Explanation of reference numerals] 10 ... Frame body, 20 ... Rotating board member, 100 ... Board member, 200 ... Outer frame, 300 ... Support frame, 400 ... Support point, 500 ... Angle adjusting means, 510 ... Internal gear, 520
... external gears, 530 ... shafts, 540 ... eccentric shafts, 56
0: Stop ball.

Claims (10)

[Claims] 1. An educational board comprising a board member supported by left and right fulcrums provided on a support frame, and an angle adjusting means for changing an angle between the board member and the support frame around the fulcrum. An educational board characterized by being prepared. 2. The educational board according to claim 1, wherein the fulcrum is provided below a vertical center of the support frame. 3. The internal gear, wherein the angle adjusting means is fixed to the side surface of the board member and has a gear on the inner circumference thereof, and the internal gear is fixed to the inside of the side surface of the support frame and has a gear on the outer circumference thereof. An externally toothed gear internally provided, a communication hole provided at the center of the externally toothed gear, a shaft that penetrates the support frame and the externally toothed gear and has its tip pivotally supported by the board member to form the fulcrum. And an eccentric shaft which is provided integrally with the shaft and is eccentric to the rotary shaft of the shaft and is rotatably inserted into the communication hole, and is connected to an end of the shaft on the support frame side. A knob, wherein the inner gear has an inner diameter larger than the outer diameter of the outer gear, has more teeth than the number of teeth of the outer gear, and meshes with the outer gear. The educational bow according to claim 1 or 2. . 4. The angle adjusting means includes a plurality of recesses provided on one of the board member and the support frame and provided on a circle centered on the fulcrum, and a case member provided on the other side. 3. An engagement member that is provided inside the case member and that engages with the recess, and a spring that biases the engagement member in the direction of the recess. Educational board described in. 5. The educational board according to claim 1, further comprising a frame body that guides the support frame so as to be movable left and right. 6. The angle adjusting device for an educational board according to claim 1, wherein the board member is a blackboard for blackboard writing. 7. The angle adjusting device for an educational board according to claim 1, wherein the board member is a white board. 8. The angle adjusting device for an educational board according to claim 1, wherein the board member is a bulletin board. 9. The board member according to claim 1, wherein the board member is a screen plate for video education.
An angle adjusting device for an educational board according to the item. 10. The educational board according to claim 5, further comprising a rotatable board member rotatable by an axis provided in front of a moving position of the support frame of the frame body.