CN220494614U - Movable blackboard - Google Patents
Movable blackboard Download PDFInfo
- Publication number
- CN220494614U CN220494614U CN202321967186.9U CN202321967186U CN220494614U CN 220494614 U CN220494614 U CN 220494614U CN 202321967186 U CN202321967186 U CN 202321967186U CN 220494614 U CN220494614 U CN 220494614U
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- China
- Prior art keywords
- main shaft
- shaft
- base
- fixedly connected
- blackboard
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- 210000000078 claw Anatomy 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Abstract
The utility model discloses a mobile blackboard, which belongs to the technical field of teaching equipment, and comprises a remote control car, wherein the remote control car is loaded with a base; the top end of the main shaft is fixedly connected with a plate surface, and the base is provided with a shaft hole through which the main shaft can penetrate; the remote control car frame is fixedly connected with a shaft seat which is rotationally connected with the end part of the main shaft, the base is positioned at the shaft hole position and is fixedly connected with a clamping device, and the clamping device is provided with a lock tongue which can be abutted against the main shaft or is far away from the main shaft so as to selectively lock the main shaft.
Description
Technical Field
The utility model relates to the technical field of teaching equipment, in particular to a mobile blackboard.
Background
Along with the change of teaching forms, the traditional fixed blackboard fixed on the wall body cannot be well suitable for the teaching forms of groups;
in the prior art, the blackboard with the Chinese patent application number of CN201920670768.8 and the application date of 2019, 05 month and 10 days and the bulletin number of CN209955608U comprises: the remote control car comprises a remote control car body and a base, wherein the base is fixedly connected to the top of the remote control car body, the base is provided with a lifting mechanism, and the top end of the lifting mechanism is fixedly connected with a telescopic cross beam; the connecting rod assembly comprises a plurality of connecting rods, the connecting rods are sequentially connected end to end in a rotary mode to form a polygon, blackboard bodies are fixedly connected to the connecting rods, two ends of a cross beam are rotationally connected with two ends or two opposite sides of a diagonal line of the polygon formed by the connecting rod assembly, the connecting rod assembly is driven to be unfolded in a polygonal mode or closed in a straight mode, and the blackboard bodies can be unfolded or folded along with the connecting rod assembly;
although this blackboard is convenient for remove, convenient to use, and blackboard face can roll over and expand, can be applicable to the group teaching form well, satisfies multiple scene and uses, but, dispose two sets of motors in this blackboard base, be used for driving blackboard body respectively and go up and down and rotation angle, manufacturing cost is higher, and control blackboard body rotation angle's motor is inefficacy in addition, and the blackboard body is in free rotation or locking state, leads to the unable normal use of blackboard body or uses the gesture to be in abnormal state.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides the movable blackboard which can selectively lock the main shaft, optimize the whole structure, lead the structure to be simple and compact, save a motor as a power source for main shaft rotation and effectively reduce the production cost;
the utility model provides the following technical scheme:
the utility model discloses a mobile blackboard, comprising:
a remote control car carrying a base;
the top end of the main shaft is fixedly connected with a plate surface, and the base is provided with a shaft hole through which the main shaft can penetrate;
the remote control car frame is fixedly connected with a shaft seat which is rotationally connected with the end part of the main shaft, the base is positioned at the position of the shaft hole and is fixedly connected with a clamping device, and the clamping device is provided with a lock tongue which can be abutted against the main shaft or away from the main shaft so as to selectively lock the main shaft.
Furthermore, the shaft seat is provided with a shaft cavity for being rotationally connected with the main shaft in an overlapping mode.
Further, a bearing in contact with the end part of the spindle is arranged on the inner bottom wall of the spindle cavity, at least one shaft sleeve in contact with the side wall of the spindle cavity is sleeved on the outer wall of the spindle shaft end, and the top end of the spindle is in contact with the shaft hole through the shaft sleeve.
Further, the bearing is a thrust ball bearing.
Further, the clamping device is a three-jaw chuck.
Further, the main shaft is a telescopic rod which can extend or retract along the axial direction.
Further, the main shaft comprises a main shaft body and a main shaft section sleeved outside the main shaft body, and a lifting mechanism is arranged at the position of the base corresponding to the main shaft section and used for driving the main shaft section to lift.
In the technical scheme, the movable blackboard provided by the utility model has the beneficial effects that:
the utility model designs the movable blackboard, the bottom end of the main shaft is rotationally connected with the frame of the remote control car through the shaft seat, the top end of the main shaft is selectively fixedly connected with the base through the clamping device, the main shaft can be selectively locked through the clamping device, the using posture of the board surface is not limited by mechanical faults.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic view of the overall structure of a mobile blackboard of the present disclosure;
FIG. 2 is an enlarged view of a portion of the bottom end of a spindle of a mobile blackboard according to the present disclosure;
FIG. 3 is an enlarged view of a portion of the top end of a spindle of a mobile blackboard according to the present disclosure;
fig. 4 is a schematic structural view of a locking mechanism of a mobile blackboard disclosed by the utility model.
Reference numerals illustrate:
a remote control car 10; a base 11; a shaft hole 111; an axle seat 12; a shaft cavity 121; a bearing 13; a locking mechanism 14; a locking tongue 141;
a panel 20; a blackboard body 21;
a main shaft 30; a spindle section 31; a sleeve 32;
a lifting mechanism 40; a motor 41; a gear 42; a sleeve 43.
Detailed Description
In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of a mobile blackboard;
the utility model relates to a mobile blackboard, comprising: a remote control car 10 and a deck 20;
the remote control car 10 is in the prior art, and is provided with a remote controller, and the remote control car 10 is controlled to bear the base 11 and the board surface 20 to move at any position of a teaching site through the remote controller;
the board 20 comprises a cross beam, a connecting rod assembly and a blackboard body 21, wherein two ends of the cross beam are rotatably connected with two opposite edges of a polygonal diagonal line formed by the connecting rod assembly, the connecting rod assembly is driven to drive the blackboard body 21 to be unfolded in a polygonal shape or closed in a straight shape, the blackboard body 21 is fixedly connected to the connecting rods, that is, the board 20 is a board 20 structure disclosed in a Chinese patent CN209955608U in the prior art, and the board 20 is not described in detail herein, but the board 20 can also be a single blackboard body 21 structure with a simple structure and low cost in the prior art, the board 20 is fixedly connected to the top end of the main shaft 30, and the main shaft 30 is inserted into the shaft hole 111 of the base 11;
based on the above structure, the frame of the remote control car 10 for moving the blackboard is fixedly connected with the shaft seat 12, the base 11 is covered outside the main shaft 30, the top end of the base 11 is provided with the shaft hole 111, the base 11 is rotatably connected with the end part of the main shaft 30 through the shaft seat 12, the base 11 is fixedly connected with the clamping device 14 at the position of the shaft hole 111, the main shaft 30 is clamped or released through the lock tongue 141 of the clamping device 14, preferably, the clamping device 14 can be a three-jaw chuck in the prior art, the lock tongue 141 is a claw of the three-jaw chuck in the prior art, when the claw of the three-jaw chuck releases the main shaft 30 in the working state, the plate surface 20 is driven, the plate surface 20 can freely rotate at any angle, and when the claw of the three-jaw chuck and the outer wall of the main shaft 30 are abutted against the main shaft 30, the three-jaw chuck can self-centering lock the main shaft 30, and further, the use angle of the plate surface 20 is positioned;
according to the movable blackboard, the shaft seat 12 is arranged on the frame of the remote control car 10 and is in rotary connection with the main shaft 30, the main shaft 30 is directly borne by the frame, the structure of the base 11 is optimized, the main shaft 30 and the plate surface 20 are borne by the base 11 in a bearing manner, the service life of the base 11 is effectively prolonged, the structure of the movable blackboard is more stable and reliable, the clamping device 14 is arranged at the position of the shaft hole 111 at the top of the base 11, the rotation angle of the main shaft 30 is selectively locked, compared with the prior art, a set of driving motor is omitted, the integral structure of the movable blackboard is optimized, the structure is more compact, the size is small, and the use posture is not limited by mechanical faults;
fig. 2 is a partial enlarged view of the bottom end of the spindle of the mobile blackboard:
fig. 3 is a partial enlarged view of the top end of the spindle of the mobile blackboard:
preferably, the shaft seat 12 is provided with a shaft cavity 121, and the shaft cavity 121 accommodates the end of the main shaft 30 and is rotationally connected with the main shaft 30 in an overlapping manner to limit the radial displacement of the shaft end of the main shaft 20.
In order to reduce the friction between the main shaft 30 and the shaft seat 12, preferably, a bearing 13 contacting with the end of the main shaft 30 is arranged on the inner bottom wall of the shaft cavity 121, in this structure, the end face of the bottom end of the main shaft 30 is in rolling contact with the bottom wall of the shaft seat 12 through the bearing 13, preferably, the bearing 13 is a thrust ball bearing 13, and the axial load is borne by the bearing 13, so as to reduce the friction between the main shaft 30 and the shaft seat 12;
in order to improve the structural stability of the spindle 30, the outer wall of the spindle 30 shaft end is sleeved with at least one shaft sleeve 32 contacted with the side wall of the shaft cavity 121, the top end of the spindle 30 is contacted with the shaft hole 111 through the shaft sleeve 32, in the structure, as shown in fig. 2, the radial clearance between the spindle 30 and the shaft cavity 121 is eliminated by the side wall of the end of the spindle 30 through two shaft sleeves 32 which are arranged at intervals, as shown in fig. 3, the radial clearance between the shaft hole 111 of the base 11 is eliminated by the top end of the spindle 30 through the shaft sleeve 32, so that the stability of the spindle 30 in rotation is further ensured, and of course, the shaft sleeve 32 can also be a deep groove ball bearing 13 in the prior art, and the radial clearance of the spindle 30 is further reduced when the spindle 30 is in radial load bearing, so that the friction force of the spindle 30 in rotation is further reduced, and the plate surface 20 can be rotated more labor-effectively;
preferably, the main shaft 30 is a telescopic rod which can extend or retract along the axial direction, and the height of the top plate surface 20 of the main shaft 30 is conveniently adjusted through a telescopic rod structure, so that the blackboard is suitable for different lifting users.
Preferably, the main shaft 30 comprises a main shaft body and a main shaft section 31 sleeved outside the main shaft body, and the base 11 is provided with a lifting mechanism 40 corresponding to the main shaft section 31 for driving the main shaft section 31 to lift.
In the structure, the main shaft body is a spline shaft, the main shaft body is in key connection with the main shaft section 31, so that the axial rotation freedom degree between the main shaft section 31 and the main shaft body is limited, the main shaft section 31 is fixedly connected with the plate surface 20, the plate surface 20 is rotated when the main shaft body is used, the main shaft body synchronously rotates along with the main shaft section 31, a lifting mechanism 40 is arranged between the outer wall of the main shaft section 31 and the base 11, the main shaft section 31 is driven to lift by the lifting mechanism 40, and the main shaft 30 is stretched or contracted;
referring to fig. 1, the lifting mechanism 40 includes a motor 41 fixedly connected to the inner wall of the base 11 and a sleeve 43 sleeved on the main shaft section 31, a gear 42 is fixedly connected to a power output shaft of the motor 41, the sleeve 43 is rotationally connected with the main shaft section 31, a tooth part meshed with the gear 42 is formed on the outer wall of the sleeve 43, and when in use, the motor 41 is started, and the gear 42 rotationally drives the main shaft section 31 to drive the plate surface 20 to rise or fall;
while certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.
Claims (7)
1. A mobile blackboard, comprising:
a remote control car (10) carrying a base (11);
the top end of the main shaft (30) is fixedly connected with a plate surface (20), and the base (11) is provided with a shaft hole (111) through which the main shaft (30) can penetrate, and is characterized in that;
the remote control car (10) frame is fixedly connected with a shaft seat (12) which is rotationally connected with the end part of the main shaft (30), the base (11) is positioned at the position of the shaft hole (111) and is fixedly connected with a clamping device (14), and the clamping device (14) is provided with a lock tongue (141) which can be abutted against the main shaft (30) or is far away from the main shaft (30) so as to selectively lock the main shaft (30).
2. A mobile blackboard according to claim 1, characterized in that;
the shaft seat (12) is provided with a shaft cavity (121) for rotationally connecting with the main shaft (30) in an overlapping mode.
3. A mobile blackboard according to claim 2, characterized in that;
the inner bottom wall of the shaft cavity (121) is provided with a bearing (13) which is contacted with the end part of the main shaft (30), the outer wall of the shaft end of the main shaft (30) is sleeved with at least one shaft sleeve (32) which is contacted with the side wall of the shaft cavity (121), and the top end of the main shaft (30) is contacted with the shaft hole (111) through the shaft sleeve (32).
4. A mobile blackboard according to claim 3, characterized in that;
the bearing (13) is a thrust ball bearing (13).
5. A mobile blackboard according to claim 1, characterized in that;
the clamping device (14) is a three-jaw chuck.
6. A mobile blackboard according to any one of claims 1-5, characterized in that;
the main shaft (30) is a telescopic rod which can extend or retract along the axial direction.
7. A mobile blackboard according to claim 6, characterized in that;
the main shaft (30) comprises a main shaft body and a main shaft section (31) sleeved outside the main shaft body, and a lifting mechanism (40) is arranged at the position of the base (11) corresponding to the main shaft section (31) and used for driving the main shaft section (31) to lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321967186.9U CN220494614U (en) | 2023-07-25 | 2023-07-25 | Movable blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321967186.9U CN220494614U (en) | 2023-07-25 | 2023-07-25 | Movable blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220494614U true CN220494614U (en) | 2024-02-20 |
Family
ID=89870417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321967186.9U Active CN220494614U (en) | 2023-07-25 | 2023-07-25 | Movable blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220494614U (en) |
-
2023
- 2023-07-25 CN CN202321967186.9U patent/CN220494614U/en active Active
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| GR01 | Patent grant |