JP3017212U - Educational board - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The board member that moves up and down and the board member that slides left and right are made to have the same height, and the sliding board member moves smoothly. [Structure] A central frame body 11 having a first auxiliary board guide member 11a at the center and side frame bodies 12 having second auxiliary board guide members 12a on both sides thereof are provided on the front wall surface of a lecture room or the like, and the frame body is provided. The part 10 is formed. The main board 20 is fixed to the front surface of the central frame body, and the rail grooves 13 and 14 provided in the first and second auxiliary board guide members 11a and 12a are provided with the slide auxiliary board 70 guided thereby. Elevating means 30 for driving the central frame body to which the main board is fixed to move up and down is provided, and the first auxiliary board guide member 11a is provided at the boundary between the central frame body and the side frame body.
Positioning means 40 for connecting the second auxiliary board guide member 12a to the positioning means 40 is arranged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to an educational board provided on a wall surface of a classroom or a lecture room. More specifically, the educational board is composed of a plurality of boards, some of which can be vertically moved up and down. The present invention relates to an educational board having a board that can be slid or left and right.

[0002]

[Prior art]

 Fixed boards on the walls of classrooms and lecture rooms are generally used as educational boards. This educational board is mainly used as a main board used for blackboard writing during education, and recently, various screens such as screens for displaying images such as so-called OHP phantom lamps and slide projectors in order to enhance the learning effect. A plurality of auxiliary boards with auxiliary functions are installed in parallel at the same time, and if necessary, they are moved to a position that is easy to see by a guide member such as a rail, or rotated by using a rotating member such as a hinge. There is also. In addition, these auxiliary boards are divided into a so-called sliding door type that is moved to the left and right by a guide member and a so-called open-close type that is rotated around an axis by a rotating member, which are collectively called an open-close blackboard. There is. As the auxiliary board, there is a board provided with a line for drawing an image, a ruled line for writing a character, a character for teaching the correction of the character, and a staff for music education. Alternatively, for screen education using a map, etc., a bulletin board on which memos and various educational materials can be posted, a so-called whiteboard for writing on a blackboard with a pen, a so-called OHP phantom lantern or a slide projector, etc. There is a screen board, etc.

Further, an educational board in which a central main board is provided so as to be able to move up and down and the height is adjusted according to the requests of students and lecturers is widely used. As a means for raising and lowering the height, as described in the patent application (Korean Patent No. 64161) filed by the applicant of the present application, a balance weight that balances with the board is provided and a slight force is not applied. There is known a method capable of maintaining a desired height. Further, although not shown, as another example of the lifting means, a spring is used instead of the balance weight to balance the load with the board as described above, and a braking means for stopping the board at a required position is provided. The structure is also known.

In the case of the educational board having the auxiliary board that moves up and down by the main board and slides left and right by the guide member, in order to slide the auxiliary board to the front of the main board that moves up and down. , It is necessary to match the height of the guide member provided on the ascending / descending main board with the height of the guide members provided on the left and right, but in the past, the height had to be adjusted manually by the user. There wasn't. In addition, even if the height is adjusted in this way, it is important to maintain the adjusted height. However, in the educational board that has the conventionally known lifting means, the positioning means for lifting the board is It was not provided. Therefore, it is difficult to match the height of the guide member provided on the main board that moves up and down with the fixed guide member, and it takes a long time, and the main board that moves up and down moves during use. There was an inconvenience that it was difficult to move it to the front of the blackboard due to the use of the auxiliary board.

On the other hand, in the case of a so-called open-close type blackboard that includes a slide type and a rotation type, the slide type board is moved in the left-right direction, or the rotation type board is rotated to move to an optimal position for the student. It has the advantage of being able to give a lecture in a given state. However, the above-mentioned conventional educational boards, etc. could not adjust the angle in the front-back direction for the trainee. Therefore, depending on the lighting in the classroom, the light may be reflected on part of the educational board, and the content may not be grasped. Also, 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 will be different. In some cases, the effects of education may be diminished due to differences in size, which may prevent accurate recognition. 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. That is, there is an inconvenience such as an illusion phenomenon being induced by image distortion or imbalance.

[0006]

[Problems to be solved by the device]

 The present invention is mainly intended to improve an educational board provided on a wall surface of a classroom or a lecture room. More specifically, in order to eliminate the above-mentioned inconvenience, an auxiliary board guide member provided on a vertically movable main board is provided. It is an object of the present invention to provide an educational board provided with positioning means so that the height of the auxiliary board guide member provided on at least one side of the auxiliary board guide member can be matched and held.

Another object of the present invention is to provide an educational board having an angle adjusting means for adjusting the angle of the educational board in the front-back direction for the student. The purpose of this is to provide an educational board in which the angle of the board can be adjusted in the front-rear direction so that the students can correctly see the shapes such as figures formed on the surface.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the educational board of the present invention comprises a main board that can be raised and lowered by a lifting means, a left and right movable auxiliary board that includes a board member housed in a support frame, and A first auxiliary board guide member that projects forward of the upper and lower edges of the main board and guides the movement of the auxiliary board; and a first auxiliary board guide member that is freely arranged side by side at least one side above and below the main board. The second auxiliary board guide member provided, the positioning means for holding the first auxiliary board guide member and the second auxiliary board guide member at the same height, and the board member in the front-back direction on the support frame. It is characterized by comprising a fulcrum which is swingably supported, and an angle adjusting means for changing the angle between the board member and the support frame about the fulcrum.

The positioning means may include a hinge member provided on either one of the first or second auxiliary board guide members, and a hook member provided on the other side for hooking the hinge member. .

The positioning means includes a guide member provided on either one of the first or second auxiliary board guide members, a rod inserted into the guide member so as to be able to move forward and backward, and a rod capable of moving forward and backward. The sliding member may include a knob member, and the other end may include a retaining hole in which the tip end of the rod is accommodated.

Further, the positioning means projects from the case member provided on either one of the first or second auxiliary board guide members, and the other projects from the case member when pressed from one of the case members. Provided in such a manner, a rod locking portion that locks the case member with the rod pressed, a spring that biases the rod in a direction opposite to the pressing direction, and a protruding portion from the case member. Alternatively, it may be composed of a latch releasing member for releasing the latch of the rod latching portion by pressing it, and a retaining hole on the other side, which is provided with the tip of the rod so as to be stored therein.

Further, the positioning means is provided with a hook on either one of the first or second auxiliary board guide member, and on the other side, a hook member for hooking on the hook and a holding member for holding the hooked state. It may be made of a member.

Further, the positioning means may be one in which a permanent magnet is provided on either one of the first or second auxiliary board guide members, and a permanent magnet attracting to the permanent magnet is provided on the other.

The elevating means includes a guide column for guiding the elevating and lowering of the main board, a balance weight having a weight substantially the same as that of the main board and the first auxiliary board guide member, the main board and the It may be composed of a wire for connecting the balance weight to the balance through a pulley.

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

The angle adjusting means is an internal gear that is fixed to the side surface of the board member and has a gear on its inner circumference, and an internal gear that is fixed inside the side surface of the support frame and has a gear on its outer circumference. 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 a 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 with 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 internal gear has an internal diameter larger than the external diameter of the external gear, has more teeth than the number of teeth of the external gear, and meshes with the external gear.

Further, a plurality of the angle adjusting means are provided on one of the board member and the support frame and are provided on a circle centered on the fulcrum, and a case member is provided on the other side. And an engaging member that is provided inside the case member and that engages with the recess, and a spring that urges the engaging member toward the recess.

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

It is preferable that a pivot auxiliary board is provided in front of the movement position of the auxiliary board of the second auxiliary board guide member and is rotated by the shaft.

[0020]

[Action]

 According to the educational board of the present invention, the positioning means makes the heights of the first and second auxiliary board guide members coincide with each other, and the positioning means holds this state. Then, the auxiliary board is moved to the front surface of the main board.

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

As the positioning means, one using a hinge, one using a sliding rod, one using a pressing rod, one using a hook, or one using a permanent magnet is used. 2 Connect the auxiliary board guide members and perform positioning.

Further, when a balance weight is provided on the elevating means, the main board is stabilized in a state where the heights of the guide members of the first and second auxiliary boards are matched, and in this state, the positioning means described above is provided. To connect the first and second auxiliary board guide members.

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 is reduced, the adjustment angle of the board member is increased.

When the angle adjusting means is based on a gear meshing system utilizing the external gear and the internal gear, the knob connected to the knob is rotated by turning the knob. Then, the internal gear, which is rotatably fitted therein, is eccentrically moved. As for the external gear and the internal gear, only the gear on the line connecting the center of the shaft and the center of the eccentric shaft meshes with each other, and the meshing of the other gears shifts away from the meshing position. Due to this eccentric movement, the outer tooth gear and the inner tooth gear move on the outer periphery of the outer tooth gear while gradually deviating from each other. As a result, a rotational force is generated between both gears, but since the external gear is fixed to the support frame, it rotates together with the board member to which the internal gear is fixed.

When the angle adjusting means uses a plurality of concave portions provided on a circle having the fulcrum as a center and engaging members which engage with the concave portions, the upper and lower end portions of the board member are pressed. Then, the engaging member disengages from the previously engaged concave portion and moves to another concave portion, but since the engaging member is engaged with the other concave portion by the spring that biases the engaging member, The angle of the board member can be changed and the state is maintained.

As the auxiliary board, a board suitable for various educational purposes such as a blackboard for whiteboard, a whiteboard, a bulletin board, or a screen board for image education is selected.

When the second auxiliary board guide member is provided with a rotation auxiliary board which is rotated by a shaft provided in front of the auxiliary board movably provided to the left and right, the surface or the auxiliary auxiliary board may be provided as necessary. Display the back side in front of the student.

[0029]

【Example】

 Next, the educational board of the present invention will be described in more detail with reference to the accompanying drawings. 1 is an explanatory view showing an embodiment of an educational board of the present invention, FIG. 2 is an explanatory view showing a first embodiment of a positioning means, FIG. 3 is an explanatory view showing a second embodiment of the positioning means, 4 is an explanatory view showing a third embodiment of the positioning means, FIG. 5 is an explanatory view showing a fourth embodiment of the positioning means, FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and FIG. 7 is an auxiliary board. FIG. 8 is an explanatory cross-sectional view showing an embodiment of the angle adjusting means, and FIG. 9 is an explanatory view showing the relationship between each gear of the angle adjusting means and the shaft and the eccentric axis. FIG. 10 is an explanatory view showing the operation of the angle adjusting means, and FIG. 11 is an enlarged view of the meshing portion of the gear.

In this embodiment, a central frame body 11 having a first auxiliary board guide member 11a at the center on the front wall surface of a lecture room and the like, and second auxiliary board guide members 12a at both sides of the central frame body 11 are provided. The side frame 12 is provided to form the frame 10. The main board 20 is fixed to the front surface of the central frame body 11, and the rail auxiliary grooves 70 provided on the first and second auxiliary board guide members 11a and 12a are provided with slide auxiliary boards 70 guided by the rail auxiliary grooves. Has been. Further, an elevating means 30 for driving the central frame 11 to which the main board 20 is fixed to move up and down is provided.

Positioning means 40 that connects the first auxiliary board guide member 11 a and the second auxiliary board guide member 12 a is provided at the boundary between the central frame body 11 and the side frame body 12.

The slide auxiliary board 70 includes a board member 70 a having a plate thickness of a certain thickness, an outer frame 71 provided on an outer peripheral edge of the board member 70 a, and a support for supporting the outer frame 71 by a fulcrum 73. The frame 72 and the board member 70a and the outer frame 71 are provided with an angle adjusting means 60 for adjusting the angle of the trainee in the front-back direction.

The frame body 10 supports a main frame 20 with the main board 20 fixed to the center front surface, and supports the upper and lower ends of the main frame 11, and supports various auxiliary boards on both sides of the central frame 11. Is divided into side frame bodies 12 for guiding the movement thereof, and only the main board 20 along with the central frame body 11 is provided so as to be vertically movable.

The main board 20 is a board for writing on the surface thereof with a writing instrument such as chalk, and occupies the main area of the educational board in this embodiment.

As shown in FIG. 6, the first auxiliary board guide member 11 a is provided with rail grooves 13 vertically so that the slide auxiliary board 70 can move to the front surface of the main board 20, and the slide auxiliary board 70 is provided with the rail grooves 13. A roller 15 is provided at the lower end of the. Apart from the rail groove 13, a rail protruding upward may be provided at the lower portion of the first auxiliary board guide member 11a, and a roller or a roller that rolls on the rail may be provided at the lower end of the slide auxiliary board 70. Therefore, when the first and second auxiliary board guide members 11a and 12a are connected, the slide auxiliary board 70 housed in the side frame 12 can be moved to the front surface of the main board 20. Further, when the slide auxiliary board 70 is housed in the side frame 12, the central frame 11 can be vertically moved by the elevating means 30 as required.

The elevating means 30 is composed of a hollow guide column 32, a balancing weight 35, a pulley 34, and a wire 31 provided therein. The guide columns 32 are installed on both sides of the main board 20 in consideration of the width of the main board 20, and guide the main board 20 up and down. The balance weight 35 has substantially the same weight as the central frame body 11 including the main board 20. Since both ends of the central frame body 11 including the main board 20 are connected to the wire 31 of the elevating means 30 and the balance weight 35 which is in balance with the weight thereof is provided via the pulley 34, a slight force is applied. It can be moved up and down, and the main board 20 can be stabilized at the desired height. In addition to the above, the lifting means 30 may use all means for lifting the central frame 11 up and down. For example, instead of the balance weight 35, the elasticity of the spring balances the weight with its own weight. Alternatively, the main board 20 or the like may be electrically moved up and down by a motor.

The most important structural feature of the present embodiment is that when the slide auxiliary board 70 slides in front of the main board 20, the boundary between the first auxiliary board guide member 11a and the second auxiliary board guide member 12a is formed. The positioning means 40 provided is to maintain the heights of the first and second auxiliary board guide members 11a and 12a in the same height, and to move the slide auxiliary board 70 smoothly along the rail grooves 13 and 14. . That is, when the slide auxiliary board 70 is to be used in front of the main board 20 while the main board 20 is moving in the height according to the request of the student or the lecturer, the first auxiliary board 70 is used. It is important that the heights of the second auxiliary board guide members 11a and 12a are made to coincide with each other to maintain this state.

2 to 5 show an embodiment of the positioning means 40 according to the present invention. First, in the first embodiment of the positioning means 40, as shown in FIG. 2, at the boundary between the first auxiliary board guide member 11a and the second auxiliary board guide member 12a, the first auxiliary board internal member 11a is provided. The hinge member 41 is constituted by fixing the latching members 42 for latching the hinge member 41 to the second auxiliary board guide member 12a. That is, by locking the hinge member 41 with the locking member 42, the main board 20 is prevented from moving vertically. In the present embodiment, the hinge member 41 is fixed to the first auxiliary board guide member 11a, and the locking member 42 is fixed to the second auxiliary board guide member 12a. On the contrary, the second auxiliary board guide member 12a is fixed. The hinge member 41 may be provided on the first auxiliary board guide member 11 a, and the hook member 42 may be provided on the first auxiliary board guide member 11 a.

Next, in the second embodiment of the positioning means 40, as shown in FIG. 3, the rod 44 which is inserted into the guide member 43 fixed to the first auxiliary board guide member 11a so as to be able to move back and forth. Is moved back and forth by the knob member 45, and is fitted into the fastening hole 46 provided in the second auxiliary board guide member 12a, thereby fixing the matched heights of the first and second auxiliary board guide members 11a, 12a. . Also in this case, on the contrary, the guide member 43 and the rod 44 may be provided in the second auxiliary board guide member 12a and the retaining hole 46 may be provided in the first auxiliary board guide member 11a.

In the third embodiment of the positioning means 40, the rod 44 protruding from one side of the case member 43 provided on the first auxiliary board guide member 11 a is pressed to push the rod from the opposite side of the case member 43. The first and second auxiliary board guide members 11a and 12a are connected by projecting the tip of 44 and fitting the tip of the rod 44 into the fastening hole 46 provided in the second auxiliary board guide member 12a. At this time, the rod retaining portion 49 provided on the rod 44 engages with the retaining portion 43a of the case member 43 to keep the rod 44 pressed, so that the first and second auxiliary board guide members 11a are retained. , 12a can be kept connected. Next, when releasing the connection between the first and second auxiliary board guide members 11a and 12a, the rod release member 49 is pushed by pressing the engagement release member 48 protruding from one side of the case member 43. Then, the hooked state between the hooking portion 43a of the case member 43 and the hooking portion 43a is released. As a result, the rod 44 is pushed back by the spring 47, and the tip of the rod 44 comes out of the retaining hole 46, so that the connection between the first and second auxiliary board guide members 11a and 12a is released.

In the fourth embodiment of the positioning means 40, as shown in FIG. 5, the first auxiliary board guide member 11a has a hook 51, and the second auxiliary board guide member 12a has a pin 53 as an axis. The holding member 50 is rotatably provided, and the retaining member 52 is rotatably provided on the holding member 50. To hold the connected state of the first and second auxiliary board guide members 11a and 12a, hook the hook member 52 on the hook 51 and fold the holding member 50 as shown by the solid line in FIG. The hooked state of the hooking member 52 is held, and the connected state is held. Then, when it is necessary to release the connection between the first and second auxiliary board guide members 11a and 12a, the holding member 50 is rotated to remove the hooking member 52 from the hook 51, thereby moving the main board 20 up and down. Will be free. Also in this case, the positions of the hook 51, the holding member 50 and the hooking member 52 provided on the second auxiliary board guide member 12a and the first auxiliary board guide member 11a may be changed in reverse to the above.

The positioning means 40 can be provided at the upper part and the lower part of the first auxiliary board guide member 11a and the second auxiliary board guide member 12a, respectively, but they are provided at a position where the user can easily operate, that is, at the lower part. preferable.

Although not shown in the drawing, permanent magnets having different polarities, that is, N pole and S pole are opposed to each other at the boundary between the first auxiliary board guide member 11a and the second auxiliary board guide member 12a. By providing such a permanent magnet, a strong magnetic force acts at a predetermined position to stop the ascending / descending movement of the magnet and maintain the stopped position. At this time, the strength of the magnetic force is set by designing the strength of the magnetic force and the number thereof in consideration of the own weight of the main board 20 to be lifted and lowered and the inertia generated when the main board 20 is moved.

As shown in FIG. 2, a shaft 81 may be provided on the front surface of the slide auxiliary board 70 at the moving position, and a rotary auxiliary board 80 that rotates about the shaft 81 may be provided. As the slide assisting board 70 and the rotation assisting board 80, for example, a line for drawing an image, a ruled line for writing a character, a character and a staff for musical education for teaching correction of the character are provided. Or a map, etc., a bulletin board on which memos and various educational materials can be posted, a so-called whiteboard for writing on a blackboard with a pen, a so-called OHP or other phantom lantern or a slide projector, etc. A screen plate or the like for doing so can be appropriately selected as necessary. These can be selected according to the educational content, and the necessary content can be displayed quickly during the lecture, so the educational effect can be increased compared to the usual blackboard.

Next, the angle adjusting means 60 will be described. As shown in FIGS. 5 to 8, the angle adjusting means 60 fixes an external gear 62 to a support frame 72, and an internal gear 63 having a larger number of teeth than the outer diameter of the external gear 62 to the outer frame 71. The eccentric shaft 65 is provided and meshed with the external gear 62, and an eccentric shaft 65 is formed in an intermediate portion of the shaft 64. The eccentric shaft 65 is rotated to the communication hole 62a of the external gear 62 while penetrating the support frame 72 and the outer frame 71. The shaft 64 is fitted as much as possible, and the end of the shaft 64 is pivotally supported by a boss hole 63a provided in the internal gear 63 so that the shaft 64 is freely rotatable.

The external gear 62 is fixed to the support frame 72 by screws or welding, and the internal gear 63 is similarly fixed to the outer frame 71. A knob 65 is coupled to the tip of the shaft 64, and the shaft 64 is integrally rotated around the center of the eccentric shaft 65 by artificially rotating the knob 65 outside the support frame 72. The internal gear 63, which is eccentrically driven and is rotatably fitted therein, is eccentrically driven. At this time, in order to narrow the gap between the support frame 72 and the outer frame 71, the external gear 62 is formed of a plate material so that the gear portion projects outward, and the internal gear 63 presses the plate material to form a recess. A gear that is formed and projects on the inner circumference is provided. As a result, as shown in FIG. 5, the outer tooth gear 62 is internally provided in the inner tooth gear 63 and meshes with the respective plate members fitted to each other. At this time, the difference in diameter between the external gear 62 and the internal gear 63 is configured to have at least a larger difference than the eccentricity difference between the shaft 64 and the eccentric shaft 65, and as shown in FIG. When both gears are in mesh with each other (upper part), it is important that the other gear (lower part in the drawing) does not completely mesh with both gears.

Next, the operation of the angle adjusting means 60 will be described with reference to FIGS. S is the center of the shaft 64, and S'is the center of the eccentric shaft 65. Since the number of teeth of the external gear 62 is smaller than that of the internal gear 63, the gear A on the extension of the line connecting S to S ′ as shown in FIG. Only are in perfect mesh. Further, the other gears are not completely meshed with each other, and the meshing shifts away from the meshing position. Here, when the knob 65 is turned by an angle α, S moves eccentrically around S ′, 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. In this way, the meshing position of the gear moves on the circumference of the external gear 62 with the circular movement of S. As a result, gears that are not completely meshed with each other before the rotation of the knob 65 are meshed with each other, so that a rotational force is generated between both gears, but the external gear 62 is fixed and cannot rotate. Therefore, the internal gear 63 and the board member 70a integrated with the internal gear 63 rotate. Therefore, the angle of the board member 70a can be adjusted by turning the knob 65. When the knob 65 is operated in the opposite direction, the rotated board member 70a returns to the original angle.

Further, when the angle is adjusted by operating the knob 65, the internal gear 63 and the external gear 62 mesh with each other as described above, and as a result, the external force acts on the board member 70a easily. The angle does not change. In order to change the angle of the board member 70a by an external force, the board member 70a must be eccentrically moved to change the meshing between the external gear 62 and the internal gear 63. This is because it is difficult due to the sliding resistance of the shaft 64 and the eccentric shaft 65. Therefore, according to the present embodiment, the angle of the board member 70a can be changed only by the knob 65. In this way, by adjusting the angle of the board member 70a in the anteroposterior direction with respect to the student by operating the knob 65, it is possible to correctly adjust this, for example, in the case where the content displayed on the surface is a particularly important image screen. It can be displayed so that the students can recognize it correctly.

As shown in FIG. 4, it is preferable that the fulcrum 73, which is the center of rotation of the board member 70a, and the shaft 64 be installed at a position lower than the middle of the entire height. On the contrary, when the upper end of the board member 70a is tilted to the side of the student, the lower end is retracted to the inner side of the frame body 10. Therefore, in order to increase the width of the angle adjustment of the board member 70a. This is because it is necessary to reduce the width at which the lower end of the board member 70a recedes toward the frame body 10 side. Thus, according to the angle adjusting means 60 of this embodiment, the user can rotate the knob 65 in a desired direction to freely adjust the installation angle of the board member 70a to any position with a small force. it can.

Although not shown in the drawings, in another embodiment of the present invention, a stop ball, which is an engaging member biased by a spring to either the outer frame or the support frame, has a metal plate. It may be configured to engage with holes formed at regular intervals on a circle around the upper fulcrum 73. According to this, when the board member 70a is rotated together with the outer frame 71 about the fulcrum 73, the board 70 stops at the position where the stop ball engages with the hole, so that the angle adjusted state is maintained. be able to. At this time, since the adjustment angle of the board member 70a is determined by the distance between the holes, it is preferable that the distance be narrow so that the angle can be adjusted as finely as possible. Further, since the board member 70a is not inclined at 45 ° or more, holes may be provided only within the range between 90 ° in the vertical state and 45 ° in consideration of this range. As described above, in the case of the angle adjustment method using the stop ball, since the angle can be adjusted only at the position where the hole is provided, the angle to be adjusted compared with the method of the stepless angle adjustment obtained in the gear meshing method. Therefore, the gear mesh type continuously variable adjusting means is more preferable.

Further, although not shown, as another embodiment of the angle adjusting means according to the present invention, in addition to the stepless gear meshing system by eccentric drive and the adjusting system by the stop ball, the space between the support frame and the outer frame is separated. It is also possible to maintain the angle-adjusted state around the fulcrum by providing an appropriate frictional force on the. However, in this case, the frictional force may be reduced due to repeated wear. Therefore, it is more preferable to use the gear meshing method. Further, the main board 20 has a flat shape and a concave curved shape at the center, but any shape may be selected.

[0052]

[Effect of device]

 According to the educational board of the present invention, the height of the first and second auxiliary board guide members is made to coincide by the positioning means, and the height of the first and second auxiliary board guide members is made by the positioning means. Since the matched state can be maintained, it becomes easy to move the sliding auxiliary board from the second auxiliary board guide member to the front surface of the main board.

As the positioning means, one using a hinge, one using a sliding rod, one using a pressing rod, one using a hook, or one using a permanent magnet is selected according to the purpose of use. can do.

Further, by providing the second auxiliary board guide member with a rotation auxiliary board which is rotated by a shaft provided in front of the auxiliary board movably provided to the left and right, the left and right of the auxiliary board Since both sides of this rotation assist board can be used as a blackboard etc. without hindering the movement, the display area of the blackboard etc. can be increased and the range of selection of various board combinations can be expanded.

Further, by using a blackboard for whiteboard, a whiteboard, or a bulletin board as the auxiliary board, it is possible to select a combination according to the purpose of various education.

Further, when a balance weight is provided on the elevating means, the main board can be stabilized in a state where the heights of the guide members of the first and second auxiliary boards are the same, so that the positioning means is provided. Thus, it becomes easy to connect the first and second auxiliary board guide members.

By providing the angle adjusting means in the present invention, it is possible to freely adjust the angle of the board member necessary for education in the front and rear directions, and to orient the blackboard at the angle desired by the student. , The effects of various 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 more situations of use can be dealt with.

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 adjusting means is provided on either the board member or the support frame and is engaged with a plurality of recesses provided on a circle centered on the fulcrum, and with the other recess provided on the other. The angle of the board member can also be adjusted by using the engaging member.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an educational board of the present invention.

FIG. 2 is an explanatory view showing a first embodiment of positioning means.

FIG. 3 is an explanatory view showing a second embodiment of positioning means.

FIG. 4 is an explanatory view showing a third embodiment of positioning means.

FIG. 5 is an explanatory view showing a fourth embodiment of positioning means.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an explanatory diagram when the angle of the auxiliary board is changed.

FIG. 8 is an explanatory sectional view showing an embodiment of an angle adjusting means.

FIG. 9 is an explanatory diagram showing a relationship between each gear of the angle adjusting means, a shaft, and an eccentric shaft.

FIG. 10 is an explanatory view showing the operation of the angle adjusting means.

FIG. 11 is an enlarged view of a meshing portion of a gear.

[Explanation of symbols]

Reference numeral 10 ... Frame body portion, 11 ... First auxiliary board guide member, 12 ...
Second auxiliary board guide member, 20 ... Main blackboard, 30 ... Lifting device, 40 ... Position determining means, 60 ... Angle adjusting means, 7
0 ... Slide assist board, 80 ... Rotation assist board.

[Procedure amendment]

[Submission date] February 28, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 14

[Correction method] Change

[Correction content]

Claims (15)

[Scope of utility model registration request] 1. A main board that is vertically movable by an elevating means, an auxiliary board that is movable left and right and that includes a board member housed in a support frame, and a main board that projects forward from the upper and lower edges of the main board. A first auxiliary board guide member for guiding the movement of the auxiliary board; a second auxiliary board guide member that is arranged side by side above and below at least one side of the main board so as to be connectable to the first auxiliary board guide member; Positioning means for holding the board guide member and the second auxiliary board guide member so that their heights match each other, a fulcrum for supporting the board member on the support frame so as to be swingable in the front-rear direction, and the board member and the support frame. And an angle adjusting means for changing the angle of the center of the fulcrum about the fulcrum. 2. The positioning means comprises the first or second positioning means.
2. The educational board according to claim 1, comprising a hinge member provided on either one of the auxiliary board guide members and a hook member provided on the other of the auxiliary board guide members for hooking the hinge member. 3. The positioning means includes the first or second positioning means.
A guide member provided on either one of the auxiliary board guide members, a rod inserted into the guide member so as to be able to move forward and backward, a knob member for sliding the rod forward and backward, and the tip of the rod can be stored at the other side. The educational board according to claim 1, characterized in that it comprises a fastening hole provided in the. 4. The positioning means includes the first or second positioning means.
A case member provided on either one of the auxiliary board guide members, a rod provided so as to project from the case member so that the other one projects from the case member when pressed from one, and the case in a state in which the rod is pressed. A rod latching portion that latches on the member, a spring that biases the rod in a direction opposite to the pressing direction, and a spring that protrudes from the case member. By pushing this, the rod latching portion is locked. The educational board according to claim 1, comprising a latch releasing member for releasing, and a retaining hole for accommodating the tip of the rod so that the rod can be accommodated therein. 5. The positioning means includes the first or second positioning means.
2. The educational board according to claim 1, wherein a hook is provided on either one of the auxiliary board guide members, and a hook member for hooking the hook on the other is provided, and a holding member for holding the hook state. . 6. The positioning means includes the first or second positioning means.
Providing a permanent magnet on either one of the auxiliary board guide members,
The educational board according to claim 1, further comprising a permanent magnet attracted to the permanent magnet. 7. The elevating means comprises a guide column for guiding the elevating and lowering of the main board, and a balance weight having a weight substantially the same as the weight of the main board and the first auxiliary board guide member.
7. The educational board according to claim 1, comprising the main board and a wire that connects the balanced weight in a balanced manner via a pulley. 8. The educational board according to claim 1, wherein the fulcrum is provided below a vertical center of the support frame. 9. The internal gear having the angle adjusting means fixed to the side surface of the board member and having a gear on its inner circumference, and the internal gear fixed to the inside of the side surface of the support frame and having an 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 any one of claims 1 to 8. . 10. The angle adjusting means is provided on either one of the board member or the support frame, and a plurality of recesses are provided on a circle centered on the fulcrum, and a case member is provided on the other side. 9. 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. 11. The educational board according to any one of claims 1 to 10, wherein the board member is a blackboard for blackboard writing. 12. The educational board according to claim 1, wherein the board member is a white board. 13. The educational board according to claim 1, wherein the board member is a bulletin board. 14. The angle adjusting device for an educational board according to claim 1, wherein the board member is a screen plate for video education. 15. A rotation assisting board which is rotated by an axis provided in front of a moving position of the auxiliary assisting board of the second assisting board guide member, according to any one of claims 1 to 14. Educational board described in.