CN210502017U - A device for industry and commerce management science classroom list - Google Patents
A device for industry and commerce management science classroom list Download PDFInfo
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- CN210502017U CN210502017U CN201920776806.8U CN201920776806U CN210502017U CN 210502017 U CN210502017 U CN 210502017U CN 201920776806 U CN201920776806 U CN 201920776806U CN 210502017 U CN210502017 U CN 210502017U
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Abstract
The utility model relates to the technical field of teaching equipment, in particular to a device for industrial and commercial administration and management classroom listing, which drives a chalk to move left and right through a motor and enables the rear end of the chalk to quickly paint on the front end of a blackboard, shortens the time of manual painting, keeps the chalk moving horizontally left and right, has higher line attractiveness after painting on the rear end of the chalk, simultaneously saves physical consumption during manual painting and improves practicability and reliability; the blackboard comprises a blackboard and chalk, wherein the rear end of the blackboard is fixed on an external wall surface, the chalk is positioned at the front end of the blackboard, and the rear end of the chalk is in contact with the front end of the blackboard; the device also comprises a first guide rail, a second guide rail, a movable plate, a fixed plate, a motor, a speed reducer, a rotating shaft, a first support plate, a second support plate, a gear, a connecting block and a sliding block.
Description
Technical Field
The utility model relates to a technical field of teaching equipment especially relates to a device that is used for industry and commerce management to learn classroom list.
Background
As is well known, a device for a class list of industrial and commercial management science is an auxiliary device for facilitating teaching of the industrial and commercial management science class, and is widely used in the field of teaching equipment; the conventional device for the classroom list of industrial and commercial management comprises a blackboard and chalks, wherein the rear end of the blackboard is fixed on an external wall surface, and the chalks are positioned outside the blackboard; when the existing device for the class list of the industrial and commercial management science is used, firstly, the chalk is manually taken up, the rear end of the chalk is in contact with the front end of the blackboard, and the chalk is manually moved, so that the rear end of the chalk is painted at the front end of the blackboard; the device that current is used for industry and commerce management science classroom to list discovers in using, and the manual work is paintd on the blackboard through the rear end of chalk and is made, need scribble a large amount of lines and form the list at the blackboard front end, when the manual work is paintd, consumes a large amount of time, influences the teaching progress, and during the manual work is paintd, the lines aesthetic property is relatively poor, influences the visual sensation, and when the manual work is paintd simultaneously, physical demands is great, leads to practicality and reliability relatively poor.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a remove and make the rear end of chalk carry out quick paintings on the front end of blackboard through the motor drive chalk about, shorten the time of artifical paintings, horizontal migration about the chalk keeps, and the lines aesthetic property after the chalk rear end is paintd is higher, removes about the chalk is automatic simultaneously, the physical demands when saving artifical paintings, the device that is used for industry and commerce management science classroom list of practicality and reliability improves.
The utility model discloses a device for industrial and commercial management classroom list, including blackboard and chalk, the rear end of blackboard is fixed on external wall, the chalk is located the front end of blackboard, the rear end of chalk contacts with the front end of blackboard; the blackboard is characterized by further comprising a first guide rail, a second guide rail, a movable plate, a fixed plate, a motor, a speed reducer, a rotating shaft, a first support plate, a second support plate, a gear, a connecting block and a sliding block, wherein the first guide rail and the second guide rail are transversely arranged on an external wall surface, the first guide rail is positioned above the blackboard, the second guide rail is positioned above the first guide rail, the front end of the second guide rail is provided with a tooth row, the movable plate is positioned in front of the first guide rail, the upper side of the rear end of the movable plate is connected with the front end of the fixed plate, the rear end of the fixed plate is connected with the front end of the motor, the bottom end of the motor is connected with the top end of the speed reducer, the middle part of the bottom end of the speed reducer is connected with the top end of the rotating shaft, the front ends of the first support plate and the second support plate are connected with the middle part of the movable plate, the gear is positioned between the first support plate and, the upside and the downside of pivot respectively with first extension board and second extension board rotatable coupling, but the middle part and the gear synchronous rotation of pivot, the rear end downside of fly leaf is connected with the front end of connecting block, the rear end of connecting block is connected with the front end of slider, but the rear end of slider and the front end sliding connection of first guide rail, the front end of fly leaf is provided with vertical mobile device, vertical mobile device's bottom is provided with adjusting device, adjusting device's bottom is provided with clamping device, clamping device's rear end and the front end of chalk are connected.
The utility model discloses a device for industry and commerce management science classroom list, vertical mobile device includes hydraulic means, the mounting panel, hydraulic stem and hydraulic pressure pipe, hydraulic means's rear end is connected with the front end of fly leaf upside, the mounting panel is located hydraulic means's below, the rear end of mounting panel is connected with the front end upside of fly leaf, the bottom of mounting panel is connected with the top of hydraulic stem, the bottom of hydraulic stem is connected with adjusting device's top, the left end upside of hydraulic stem and hydraulic means's right-hand member downside intercommunication, the left end downside of hydraulic stem and the right-hand member upside intercommunication of hydraulic stem.
The utility model discloses a device for industry and commerce management science classroom list, clamping device includes the shell, the apron, first kicking block, spring and second kicking block, the top of shell is connected with adjusting device's bottom, the inside of shell is provided with the cavity, the rear end intercommunication of cavity is provided with the inserted hole, the front end intercommunication of cavity is provided with the maintenance mouth, the apron lid is at the front end of maintenance mouth, the rear end of apron passes through bolt-up with the front end of shell and is connected, first kicking block, spring and second kicking block all are located inside the cavity, the front end of first kicking block is connected with the rear end of spring, the front end of spring is connected with the rear end of second kicking block, the front end of second kicking block contacts with the rear end of apron, the front end of chalk passes the inserted hole and stretches into to inside the cavity, the front end of chalk pastes tightly with the rear end of first kicking block.
The utility model discloses a device for business administration and science classroom list, clamping device still include clamping sleeve and rubber circle, and the through-hole that runs through around the middle part of clamping sleeve is provided with, and the outer wall of rubber circle is connected with the inside rear side that passes through, and inside clamping sleeve and rubber circle all were located the cavity, and the front end of clamping sleeve is connected with the rear end middle part of first kicking block, and the rubber circle passes through rubber circle inner circle suit and pastes tightly at the rear side of chalk and with the outer wall of chalk.
The utility model discloses a device for industry and commerce management science classroom list, clamping device still include adjusting bolt, and the screw hole that runs through around the middle part of apron is provided with, and adjusting bolt's rear end screw in screwed hole stretches out to the rear of apron, adjusting bolt's rear end and the front end contact of second kicking block.
The utility model discloses a device for industry and commerce management science classroom list, adjusting device includes adjusting plate and two sets of fastening bolt, the top middle part of adjusting plate is connected with the bottom of hydraulic stem, the rectangular shape fixed orifices that runs through about the left side of adjusting plate and right side all vertically are provided with, the top left side and the right side of shell all communicate and are provided with the screw hole, two sets of screw holes correspond with the position of two sets of fixed orificess respectively, two sets of fixed orificess and the two sets of screw holes of screw in respectively are passed respectively to two sets of fastening bolt's bottom.
The utility model discloses a device for industry and commerce management science classroom list still includes two sets of backup pads and two sets of controlling means, and the rear end of two sets of backup pads is connected with second guide rail front end left side and right side respectively, and the inner of two sets of backup pads is connected with two sets of controlling means's outer end respectively.
The utility model discloses a device for industry and commerce management science classroom list still includes deflector and guide post, and the downside at the hydraulic stem is installed on the right side of deflector, and the left side of deflector is provided with the sliding opening that runs through downwards, and the top of guide post is connected with the bottom left side of mounting panel, and the bottom of guide post is passed sliding opening and is stretched out to the deflector below, the bottom of guide post and the bottom parallel and level of blackboard, sliding opening and guide post slidable connection.
Compared with the prior art, the beneficial effects of the utility model are that: the motor is started, the motor drives the speed reducer to rotate, the speed reducer drives the gear to rotate through the rotating shaft, the rear end of the gear is meshed with the front end gear row of the second guide rail, the gear moves left and right, the gear drives the first support plate and the second support plate to move left and right through the rotating shaft, the first support plate and the second support plate drive the movable plate to move left and right, the movable plate drives the chalk to move left and right through the vertical moving device, the adjusting device and the clamping device, the rear end of the chalk transversely paints on the front wall of the blackboard, the movable plate drives the sliding block to move left and right through the connecting block, the rear end of the sliding block is connected with the front end of the first guide rail in a sliding mode, the motor drives the chalk to move left and right, the rear end of the chalk is quickly painted on the front end of the blackboard, manual painting time is shortened, the lines aesthetic property after the chalk rear end is paintd is higher, improves the visual sensation, and the chalk is controlled in the automation simultaneously and is removed, saves the physical demands when artifical paintings, improves practicality and reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a left enlarged view of the activity board of FIG. 1;
FIG. 3 is an enlarged schematic view of the clamping device of FIG. 2;
FIG. 4 is an enlarged view of the support plate of FIG. 1;
in the drawings, the reference numbers: 1. a blackboard; 2. chalk; 3. a first guide rail; 4. a second guide rail; 5. a movable plate; 6. a fixing plate; 7. a motor; 8. a speed reducer; 9. a rotating shaft; 10. a first support plate; 11. a second support plate; 12. a gear; 13. connecting blocks; 14. a slider; 15. a hydraulic device; 16. mounting a plate; 17. a hydraulic lever; 18. a hydraulic tube; 19. a housing; 20. a cover plate; 21. a first top block; 22. a spring; 23. a second top block; 24. a clamping sleeve; 25. a rubber ring; 26. adjusting the bolt; 27. an adjustment plate; 28. fastening a bolt; 29. a support plate; 30. a control device; 31. a guide plate; 32. and a guide post.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, the device for classroom lists in industrial and commercial management of the present invention comprises a blackboard 1 and chalks 2, wherein the rear end of the blackboard 1 is fixed on an external wall surface, the chalks 2 are located at the front end of the blackboard 1, and the rear end of the chalks 2 is in contact with the front end of the blackboard 1; the blackboard comprises a first guide rail 3, a second guide rail 4, a movable plate 5, a fixed plate 6, a motor 7, a speed reducer 8, a rotating shaft 9, a first support plate 10, a second support plate 11, a gear 12, a connecting block 13 and a slide block 14, wherein the first guide rail 3 and the second guide rail 4 are transversely arranged on an external wall surface, the first guide rail 3 is positioned above the blackboard 1, the second guide rail 4 is positioned above the first guide rail 3, the front end of the second guide rail 4 is provided with a rack, the movable plate 5 is positioned in front of the first guide rail 3, the upper side of the rear end of the movable plate 5 is connected with the front end of the fixed plate 6, the rear end of the fixed plate 6 is connected with the front end of the motor 7, the bottom end of the motor 7 is connected with the top end of the speed reducer 8, the middle part of the bottom end of the speed reducer 8 is connected with the top end of the rotating shaft 9, the front ends of the first support plate 10 and the second support plate, the rear end of a gear 12 is meshed with the tooth row, the bottom end of a rotating shaft 9 penetrates through a first support plate 10, the gear 12 and a second support plate 11 and extends to the lower side of the second support plate 11, the upper side and the lower side of the rotating shaft 9 are respectively rotatably connected with the first support plate 10 and the second support plate 11, the middle of the rotating shaft 9 and the gear 12 can synchronously rotate, the lower side of the rear end of a movable plate 5 is connected with the front end of a connecting block 13, the rear end of the connecting block 13 is connected with the front end of a sliding block 14, the rear end of the sliding block 14 is slidably connected with the front end of a first guide rail 3, the front end of the movable plate 5 is provided with a vertical moving device, the bottom end of the vertical moving device is provided with an adjusting device, the bottom end of the adjusting device is provided with; the motor is started, the motor drives the speed reducer to rotate, the speed reducer drives the gear to rotate through the rotating shaft, the rear end of the gear is meshed with the front end gear row of the second guide rail, the gear moves left and right, the gear drives the first support plate and the second support plate to move left and right through the rotating shaft, the first support plate and the second support plate drive the movable plate to move left and right, the movable plate drives the chalk to move left and right through the vertical moving device, the adjusting device and the clamping device, the rear end of the chalk transversely paints on the front wall of the blackboard, the movable plate drives the sliding block to move left and right through the connecting block, the rear end of the sliding block is connected with the front end of the first guide rail in a sliding mode, the motor drives the chalk to move left and right, the rear end of the chalk is quickly painted on the front end of the blackboard, manual painting time is shortened, the lines aesthetic property after the chalk rear end is paintd is higher, improves the visual sensation, and the chalk is controlled in the automation simultaneously and is removed, saves the physical demands when artifical paintings, improves practicality and reliability.
The utility model discloses a device for industrial and commercial management science classroom list, vertical mobile device includes hydraulic means 15, mounting panel 16, hydraulic stem 17 and hydraulic pressure pipe 18, hydraulic means 15's rear end is connected with the front end of fly leaf 5 is upsidedown, mounting panel 16 is located hydraulic means 15's below, mounting panel 16's rear end is connected with the front end of fly leaf 5 is upsidedown, mounting panel 16's bottom is connected with the top of hydraulic stem 17, the bottom of hydraulic stem 17 is connected with adjusting device's top, the left end upside of hydraulic pressure pipe 18 communicates with hydraulic means 15's right-hand member downside, the left end downside of hydraulic pressure pipe 18 communicates with the right-hand member upside of hydraulic stem 17; hydraulic means reciprocates through the bottom of hydraulic stem control hydraulic stem, the bottom of hydraulic stem drives adjusting device and reciprocates, adjusting device drives clamping device and reciprocates, clamping device drives the chalk and reciprocates, the rear end of chalk carries out vertical paintings on the front end of blackboard, control the chalk through hydraulic means and reciprocate at the front end of blackboard, make the rear end of chalk carry out vertical paintings at the front end of blackboard, make things convenient for the drawing system of vertical lines, improve the mode that the chalk rear end was paintd, make things convenient for the drawing system of list, save the time and the physical power of the vertical lines of manual drawing system, improve practicality and reliability.
The utility model relates to a device for industrial and commercial management classroom lists, a clamping device comprises a shell 19, a cover plate 20 and a first top block 21, the chalk holder comprises a spring 22 and a second ejector block 23, the top end of a shell 19 is connected with the bottom end of an adjusting device, a cavity is arranged inside the shell 19, an insertion hole is formed in the rear end of the cavity in a communicating mode, a maintenance hole is formed in the front end of the cavity in a communicating mode, a cover plate 20 covers the front end of the maintenance hole, the rear end of the cover plate 20 is fixedly connected with the front end of the shell 19 through a bolt, the first ejector block 21, the spring 22 and the second ejector block 23 are all located inside the cavity, the front end of the first ejector block 21 is connected with the rear end of the spring 22, the front end of the spring 22 is connected with the rear end of the second ejector block 23, the front end of the second ejector block 23 is in contact with the rear end of the cover plate 20, the front end of chalk 2 penetrates through the insertion hole and extends into the cavity, and the front end of the chalk 2; the spring is in a compression state, the rear end of the spring generates backward thrust to the first ejector block, the rear end of the first ejector block generates backward thrust to the chalk, the rear end of the chalk is attached to the front end of the blackboard tightly, the rear end of the chalk is pushed to be attached to the front end of the blackboard tightly through the spring, the chalk is enabled to be attached to the front end of the blackboard all the time in the continuous use process, the rear end of the chalk is attached to the front end of the blackboard all the time, the chalk is kept in a usable state all the time, and the practicability and the reliability are improved.
The utility model discloses a device for industrial and commercial management science classroom list, clamping device still include clamping sleeve 24 and rubber circle 25, the middle part of clamping sleeve 24 is provided with the through-hole that runs through from beginning to end, the outer wall of rubber circle 25 is connected with the inside rear side that passes through, clamping sleeve 24 and rubber circle 25 all are located the cavity inside, the front end of clamping sleeve 24 is connected with the rear end middle part of first kicking block 21, rubber circle 25 is in the rear side of chalk 2 and is hugged closely with the outer wall of chalk 2 through the inner circle suit of rubber circle 25; the rubber circle body has elasticity, and the inner wall of rubber circle inner circle extrudees the rear side outer wall of chalk and carries out centre gripping fixed action to the chalk, and when the chalk was changed, can directly extract the chalk through the rear end of chalk, passes the inserted hole with new chalk front end and inserts in the rubber circle inner circle and make the front end of chalk and the rear end contact of first kicking block, improves the practicality.
The utility model discloses a device for industrial and commercial management classroom list, clamping device still include adjusting bolt 26, and the middle part of apron 20 is provided with the screw hole that runs through from beginning to end, and adjusting bolt 26's rear end is screwed in the screw hole and is stretched out to the rear of apron 20, and adjusting bolt 26's rear end contacts with the front end of second kicking block 23; through the rotation of the adjusting bolt, the second ejector block can be pushed to move back and forth, and the elastic force of the spring is adjusted, so that the tightness between the rear end of the chalk and the front end of the blackboard is adjusted, and the practicability and the reliability are improved.
The utility model discloses a device for industrial and commercial management science classroom list, adjusting device include adjusting plate 27 and two sets of fastening bolt 28, the top middle part of adjusting plate 27 is connected with the bottom of hydraulic stem 17, the left side and the right side of adjusting plate 27 all vertically are provided with the rectangular shape fixed orifices that run through from top to bottom, the top left side and the right side of shell 19 all communicate and are provided with the screw hole, two sets of screw holes correspond with the position of two sets of fixed orifices respectively, the bottom of two sets of fastening bolt 28 passes two sets of fixed orifices respectively and screws into respectively two sets of screw holes insides; two sets of fastening bolts are unscrewed respectively, and through two sets of strip-shaped fixing holes, the front and back positions of the shell can be adjusted, so that the distance between the rear end of the shell and the front end of the blackboard is adjusted, the two sets of fastening bolts are screwed respectively, the adjusting plate and the shell can be fixedly connected, and the practicability and the reliability are improved.
The utility model discloses a device for industry and commerce management science classroom list still includes two sets of backup pads 29 and two sets of controlling means 30, and the rear end of two sets of backup pads 29 is connected with second guide rail 4 front end left side and right side respectively, and the inner of two sets of backup pads 29 is connected with the outer end of two sets of controlling means 30 respectively; when the movable plate moves leftwards, the left end of the movable plate is in contact with the right end of the left side control device, the left side control device controls the motor to stop rotating, the motor drives the movable plate to stop moving, when the movable plate moves rightwards, the right end of the movable plate is in contact with the left end of the right side control device, the right side control device controls the motor to stop rotating, the motor drives the movable plate to stop rotating, through the arrangement of the two groups of supporting plates and the two groups of control devices, the left-right moving position of the movable plate can be limited, the movable plate is prevented from being separated from the first guide rail.
The utility model discloses a device for industry and commerce management science classroom list still includes deflector 31 and guide post 32, the right side of deflector 31 is installed at the downside of hydraulic stem 17, the left side of deflector 31 is provided with the sliding opening that runs through downwards, the top of guide post 32 is connected with the bottom left side of mounting panel 16, the bottom of guide post 32 passes the sliding opening and stretches out to the below of deflector 31, the bottom of guide post 32 is parallel and level with the bottom of blackboard 1, the sliding opening is connected with guide post 32 slidable; when the downside of hydraulic stem reciprocated, the hydraulic stem drove the deflector and reciprocated, and the deflector left side sliding port slides from top to bottom on the outer wall of guide post, through setting up deflector and guide post, can lead clamping device, prevents that clamping device from rocking, improves the reliability.
The utility model discloses a device for industrial and commercial management classroom list, it is at work, at first pass the chalk front end insert rubber circle inner circle through the inserted hole and make the front end of chalk contact with the rear end of first kicking block, the rear end of chalk contacts with the front end of blackboard, then control motor opens, motor drive reduction gear rotates, reduction gear drives gear revolve through the pivot, the rear end of gear meshes with the front end tooth row of second guide rail, the gear moves about, the gear drives first extension board and second extension board through the pivot and moves about, first extension board and second extension board drive the fly leaf and move about, the fly leaf drives the chalk to move about through vertical mobile device, adjusting device and clamping device, the rear end of chalk is transversely paintd on the front wall of blackboard, the fly leaf drives the slider through the connecting block and moves about, the rear end of slider is connected with the front end of first guide rail in a slidable way, meanwhile, the hydraulic device controls the bottom end of the hydraulic rod to move up and down through the hydraulic pipe, the bottom end of the hydraulic rod drives the adjusting device to move up and down, the adjusting device drives the clamping device to move up and down, the clamping device drives the chalk to move up and down, and the rear end of the chalk is vertically painted on the front end of the blackboard.
The installation mode, the connection mode or the setting mode of the device for the industrial and commercial management classroom list of the utility model are common mechanical modes, and the device can be implemented as long as the beneficial effects can be achieved; hydraulic devices and control devices are commercially available.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A device for a class list of industrial and commercial management comprises a blackboard (1) and chalks (2), wherein the rear end of the blackboard (1) is fixed on an external wall surface, the chalks (2) are located at the front end of the blackboard (1), and the rear ends of the chalks (2) are in contact with the front end of the blackboard (1); the blackboard is characterized by further comprising a first guide rail (3), a second guide rail (4), a movable plate (5), a fixed plate (6), a motor (7), a speed reducer (8), a rotating shaft (9), a first support plate (10), a second support plate (11), a gear (12), a connecting block (13) and a sliding block (14), wherein the first guide rail (3) and the second guide rail (4) are transversely arranged on an external wall surface, the first guide rail (3) is positioned above the blackboard (1), the second guide rail (4) is positioned above the first guide rail (3), a tooth row is arranged at the front end of the second guide rail (4), the movable plate (5) is positioned in front of the first guide rail (3), the upper side of the rear end of the movable plate (5) is connected with the front end of the fixed plate (6), the rear end of the fixed plate (6) is connected with the front end of the motor (7), the bottom end of the motor (7) is connected with the top end of the speed, the middle part of the bottom end of the speed reducer (8) is connected with the top end of the rotating shaft (9), the front ends of the first support plate (10) and the second support plate (11) are connected with the middle part of the rear end of the movable plate (5), the gear (12) is positioned between the first support plate (10) and the second support plate (11), the rear end of the gear (12) is meshed with the gear row, the bottom end of the rotating shaft (9) penetrates through the first support plate (10), the gear (12) and the second support plate (11) and extends to the lower part of the second support plate (11), the upper side and the lower side of the rotating shaft (9) are respectively rotatably connected with the first support plate (10) and the second support plate (11), the middle part of the rotating shaft (9) and the gear (12) can synchronously rotate, the lower side of the rear end of the movable plate (5) is connected with the front end of the connecting block (13), the rear end of the connecting block (13) is connected with the front end of the sliding block (14), and the rear end of the sliding block, the front end of the movable plate (5) is provided with a vertical moving device, the bottom end of the vertical moving device is provided with an adjusting device, the bottom end of the adjusting device is provided with a clamping device, and the rear end of the clamping device is connected with the front end of the chalk (2).
2. The device for the list of industrial, commercial and management science classes according to claim 1, characterized in that the vertical moving device comprises a hydraulic device (15), a mounting plate (16), a hydraulic rod (17) and a hydraulic pipe (18), the rear end of the hydraulic device (15) is connected with the upper side of the front end of the movable plate (5), the mounting plate (16) is located below the hydraulic device (15), the rear end of the mounting plate (16) is connected with the upper side of the front end of the movable plate (5), the bottom end of the mounting plate (16) is connected with the top end of the hydraulic rod (17), the bottom end of the hydraulic rod (17) is connected with the top end of the adjusting device, the upper side of the left end of the hydraulic pipe (18) is communicated with the lower side of the right end of the hydraulic device (15), and the lower side of the left end of the hydraulic pipe (18) is communicated with the upper side of the right end of.
3. The device for the list of industrial, commercial and administrative classes as claimed in claim 2, characterized in that the clamping device comprises a housing (19), a cover plate (20), a first top block (21), a spring (22) and a second top block (23), the top end of the housing (19) is connected with the bottom end of the adjusting device, a cavity is arranged inside the housing (19), the rear end of the cavity is provided with an insertion opening, the front end of the cavity is provided with a maintenance opening, the cover plate (20) covers the front end of the maintenance opening, the rear end of the cover plate (20) is connected with the front end of the housing (19) through a bolt fastening, the first top block (21), the spring (22) and the second top block (23) are all located inside the cavity, the front end of the first top block (21) is connected with the rear end of the spring (22), the front end of the spring (22) is connected with the rear end of the second top block (23), and the front end of the second top block (23) is in contact with the rear end of the cover plate (20), the front end of the chalk (2) penetrates through the insertion opening and extends into the cavity, and the front end of the chalk (2) is attached to the rear end of the first ejector block (21).
4. The device for the list of the industrial and commercial administrative classroom according to claim 3, wherein the clamping device further comprises a clamping sleeve (24) and a rubber ring (25), a through hole penetrating through the clamping sleeve (24) is formed in the middle of the clamping sleeve, the outer wall of the rubber ring (25) is connected with the rear side of the passing inner part, the clamping sleeve (24) and the rubber ring (25) are both located inside the cavity, the front end of the clamping sleeve (24) is connected with the middle of the rear end of the first ejector block (21), and the rubber ring (25) is sleeved on the rear side of the chalk (2) through the inner ring of the rubber ring (25) and is tightly attached to the outer wall of the chalk (2).
5. The device for the list of industrial and commercial administration classroom according to claim 4 wherein the clamping means further includes an adjusting bolt (26), the middle portion of the cover plate (20) is provided with a threaded hole running through the front and back, the rear end of the adjusting bolt (26) is screwed into the threaded hole and extends to the rear of the cover plate (20), and the rear end of the adjusting bolt (26) contacts the front end of the second top block (23).
6. The device for the list of the industrial and commercial administration and management classroom according to claim 5, wherein the adjusting device comprises an adjusting plate (27) and two sets of fastening bolts (28), the middle of the top end of the adjusting plate (27) is connected with the bottom end of the hydraulic rod (17), the left side and the right side of the adjusting plate (27) are longitudinally provided with elongated fixing holes which penetrate through up and down, the left side and the right side of the top end of the housing (19) are respectively communicated with threaded holes, the two sets of threaded holes respectively correspond to the two sets of fixing holes in position, and the bottom ends of the two sets of fastening bolts (28) respectively penetrate through the two sets of fixing holes and are respectively screwed into the two sets of threaded holes.
7. The device for the list of industrial and commercial administration and science classes according to claim 6, characterized by further comprising two sets of supporting plates (29) and two sets of control devices (30), wherein the rear ends of the two sets of supporting plates (29) are respectively connected with the left side and the right side of the front end of the second guide rail (4), and the inner ends of the two sets of supporting plates (29) are respectively connected with the outer ends of the two sets of control devices (30).
8. The device for the list of the industrial and commercial administration and management classroom according to claim 7, further comprising a guide plate (31) and a guide post (32), wherein the right side of the guide plate (31) is installed at the lower side of the hydraulic rod (17), the left side of the guide plate (31) is provided with a sliding port which penetrates downwards, the top end of the guide post (32) is connected with the left side of the bottom end of the installation plate (16), the bottom end of the guide post (32) penetrates through the sliding port and extends out to the lower side of the guide plate (31), the bottom end of the guide post (32) is flush with the bottom end of the blackboard (1), and the sliding port is slidably connected with the guide post (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920776806.8U CN210502017U (en) | 2019-05-25 | 2019-05-25 | A device for industry and commerce management science classroom list |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920776806.8U CN210502017U (en) | 2019-05-25 | 2019-05-25 | A device for industry and commerce management science classroom list |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210502017U true CN210502017U (en) | 2020-05-12 |
Family
ID=70576792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920776806.8U Expired - Fee Related CN210502017U (en) | 2019-05-25 | 2019-05-25 | A device for industry and commerce management science classroom list |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210502017U (en) |
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2019
- 2019-05-25 CN CN201920776806.8U patent/CN210502017U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 Termination date: 20210525 |
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| CF01 | Termination of patent right due to non-payment of annual fee |