CN215041705U

CN215041705U - Board is used in junior middle school mathematics teaching drawing

Info

Publication number: CN215041705U
Application number: CN202121229593.0U
Authority: CN
Inventors: 唐楷
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-12-07
Anticipated expiration: 2031-06-03

Abstract

The utility model provides a drawing board for junior middle school mathematics teaching, which comprises a drawing board, wherein two vertical plates which are vertically arranged are symmetrically arranged at the middle position of the lower surface of the drawing board, a supporting plate is rotatably arranged between the two vertical plates, the lower end of the supporting plate is fixedly connected with a base, one surface of the vertical plate facing the supporting plate is provided with a horizontal threaded hole, a threaded rod for limiting the position of the supporting plate is connected with the threaded hole in the threaded hole, a shielding cylinder which is concentric with the threaded hole is arranged on one side of the threaded hole, which is far away from the supporting plate, the shielding barrel is sleeved on the threaded rod, the dust blocking disc is arranged in the shielding barrel in a sliding mode, the dust blocking disc is sleeved on the threaded rod and is fixedly connected with the threaded rod, the ash blocking plate surface is pasted through glue and is had and shelter from a rubber circle that a section of thick bamboo internal surface was laminated mutually, compares with prior art, the utility model discloses following beneficial effect has: the shielding and dust prevention can be realized to enter the threaded connection part at will.

Description

Board is used in junior middle school mathematics teaching drawing

Technical Field

The utility model relates to a board is used in junior middle school mathematics teaching drawing belongs to the teaching equipment field.

Background

Mathematics as a cognitive course plays an increasingly important role in the educational teaching of students. And graphics are often drawn during mathematical education.

The utility model discloses a chinese utility model patent that publication number is CN210190952U discloses a college mathematics teaching drawing board, the hydraulic stem top through be connected with the pivoted mode with the frame, fastening bolt is installed with the frame attach position to the hydraulic stem, its weak point that exists is: a part of screw rod positions of the fastening bolts are in an exposed state, and when dust attached to the fastening bolts enters the screw holes matched with the fastening bolts along with the rotation of the fastening bolts, the resistance for rotating the fastening bolts is increased, and the dust entering the screw holes is time-consuming and labor-consuming to clean.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a board is used in junior middle school's mathematics teaching drawing to solve the problem that proposes in the above-mentioned background art, the utility model discloses a shelter from the dust proof and get into threaded connection position at will.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a drawing board for junior middle school mathematics teaching comprises a drawing board, wherein two vertical plates which are vertically arranged are symmetrically arranged at the middle position of the lower surface of the drawing board, a supporting plate is rotatably arranged between the two vertical plates, the lower end of the supporting plate is fixedly connected with a base, one surface of the vertical plate facing the supporting plate is provided with a horizontal threaded hole, a threaded rod for limiting the position of the supporting plate is connected in the threaded hole in a threaded manner, a knob head is fixedly connected at one end of the threaded rod far away from the threaded hole, one side of the threaded hole, which is far away from the supporting plate, is provided with a shielding cylinder which is concentrically arranged with the threaded hole, the shielding cylinder is sleeved on the threaded rod, the ash blocking disc is arranged in the blocking cylinder in a sliding way, the ash blocking disc is sleeved on the threaded rod and is fixedly connected with the threaded rod, the outer surface of the ash blocking disc is adhered with a rubber ring which is attached to the inner surface of the shielding cylinder through glue.

Further, the rubber circle internal surface evenly is fixed with a plurality of arch, arch and rubber circle are the integrated into one piece structure, ash blocking plate outward appearance is annular equidistance and has seted up a plurality of and protruding matched with pinhole, the arch is pasted in the pinhole through glue.

Furthermore, the outer surface of one end of the shielding cylinder close to the vertical plate is fixedly connected with a ring edge, and the ring edge is fixedly connected with the vertical plate through a screw.

Furthermore, two limiting frames are symmetrically arranged on the upper surface of the base, and balancing weights are arranged in the limiting frames.

Further, four wheels are installed on the lower surface of the base, and the four wheels are arranged at four corners of the lower surface of the base respectively.

Further, one side fixedly connected with set-square that the riser deviates from the backup pad, set-square and drawing board fixed connection.

The utility model has the advantages that:

1. the threaded portion of the threaded rod is hidden in a closed space formed by the shielding cylinder, the dust blocking disc and the vertical plate, the effect that dust is prevented from entering the threaded hole along with the rotation of the threaded rod is achieved, one side, deviating from the shielding cylinder, of the threaded hole is blocked by the supporting plate, and the purpose that the dust is prevented from entering the threaded connection portion at will is achieved.

2. The rubber ring which is attached to the inner wall of the shielding cylinder is arranged on the ash blocking disc, so that the ash blocking disc is in soft contact with the shielding cylinder, abnormal sound caused by friction is prevented, and the sealing performance between the ash blocking disc and the inner wall of the shielding cylinder is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of a drawing board for junior middle school mathematics teaching of the present invention;

FIG. 2 is an assembly diagram of the middle ash tray, the shielding cylinder, the threaded rod and the vertical plate of the middle school mathematics teaching drawing board of the utility model;

in the figure: 1-drawing board, 2-balancing weight, 3-wheel, 4-spacing frame, 5-base, 6-riser, 7-supporting plate, 8-sheltering cylinder, 9-threaded rod, 10-knob head, 11-threaded hole, 12-ring edge, 13-rubber ring and 14-ash blocking disk.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the utility model provides a board is used in junior middle school's mathematics teaching drawing, includes drawing board 1, and two vertical arrangement's riser 6 is installed to 1 lower surface middle part position symmetry of drawing board, rotates between two risers 6 and installs backup pad 7, and riser 6 plays the effect of joint support board 7 and drawing board 1.

One side fixedly connected with set-square that riser 6 deviates from backup pad 7, set-square and 1 fixed connection of drawing board install the set-square between riser 6 and drawing board 1, improve the mechanical strength that riser 6 and drawing board 1 are connected.

The lower end of the supporting plate 7 is fixedly connected with a base 5, and the base 5 supports the drawing board 1.

Two spacing frames 4 are installed to 5 upper surface symmetries of base, are equipped with balancing weight 2 in the spacing frame 4, arrange balancing weight 2 in spacing frame 4 to the restriction of balancing weight 2 positions, installation balancing weight 2 improves the stability of placing on base 5.

Four wheels 3 are installed to 5 lower surface of base, and four wheels 3 arrange respectively at four edges and corners on 5 lower surfaces of base, install wheel 3 on base 5, are convenient for remove this device.

The riser 6 is seted up the screw hole 11 of level form towards the one side of backup pad 7, and screw hole 11 female connection has the threaded rod 9 that is used for restricting the backup pad 7 position, and threaded rod 9 keeps away from the one end fixed connection of screw hole 11 has the knob head 10, installs knob head 10 on threaded rod 9, is convenient for rotate threaded rod 9.

One side that screw hole 11 deviates from backup pad 7 is equipped with the section of thick bamboo 8 that shelters from of arranging with screw hole 11 is concentric, shelter from a 8 covers and establish on threaded rod 9, it has ash tray 14 to shelter from an 8 slidable mounting in section of thick bamboo, ash tray 14 covers establishes on threaded rod 9 and with threaded rod 9 fixed connection, hide the screw thread portion position of threaded rod 9 in sheltering from a 8, ash tray 14 and riser 6 form the enclosure space in, play the effect that the dust proof got into in the screw hole 11 along with threaded rod 9 rotates, screw hole 11 deviates from one side that shelters from a 8 and is blocked by backup pad 7, realize the purpose that the dust proof gets into threaded connection position at will.

The outer surface of the ash blocking disc 14 is pasted with a rubber ring 13 which is attached to the inner surface of the shielding cylinder 8 through glue, the rubber ring 13 which is attached to the inner wall of the shielding cylinder 8 is installed on the ash blocking disc 14, soft contact of the ash blocking disc 14 and the shielding cylinder 8 is achieved, abnormal sound caused by friction is prevented, and meanwhile, the sealing performance between the ash blocking disc 14 and the inner wall of the shielding cylinder 8 is improved.

A plurality of bulges are uniformly fixed on the inner surface of the rubber ring 13, the bulges and the rubber ring 13 are of an integrally formed structure, the outer surface of the ash blocking disc 14 is in an annular equidistant shape and is provided with a plurality of pin holes matched with the bulges, the bulges are stuck in the pin holes through glue, the bulges on the rubber ring 13 are stuck in the pin holes, and the reliability of connection of the rubber ring 13 and the ash blocking disc 14 is improved.

The outer fixed surface of one end that shelters from a section of thick bamboo 8 and is close to riser 6 is connected with circle limit 12, and circle limit 12 passes through screw and riser 6 fixed connection, installs circle limit 12 on sheltering from a section of thick bamboo 8, is convenient for shelter from a section of thick bamboo 8 and riser 6's dismouting.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a board is used in junior middle school mathematics teaching drawing, includes drawing board (1), its characterized in that: the drawing board is characterized in that two vertically-arranged vertical plates (6) are symmetrically arranged at the middle position of the lower surface of the drawing board (1), a supporting plate (7) is installed between the two vertical plates (6) in a rotating mode, a base (5) is fixedly connected to the lower end of the supporting plate (7), a horizontal threaded hole (11) is formed in one surface, facing the supporting plate (7), of each vertical plate (6), a threaded rod (9) used for limiting the position of the supporting plate (7) is connected to the inner thread of each threaded hole (11), a knob head (10) is fixedly connected to one end, far away from the threaded hole (11), of each threaded rod (9), a shielding cylinder (8) concentrically arranged with the corresponding threaded hole (11) is arranged on one side, away from the supporting plate (7), the shielding cylinder (8) is sleeved on the threaded rod (9), an ash blocking disc (14) is slidably installed in the shielding cylinder (8), and the ash blocking disc (14) is sleeved on the threaded rod (9) and is fixedly connected with the threaded rod (9), the outer surface of the ash blocking disc (14) is adhered with a rubber ring (13) which is attached to the inner surface of the shielding cylinder (8) through glue.

2. The board for junior middle school mathematics teaching drawing as claimed in claim 1, wherein: rubber circle (13) internal surface evenly is fixed with a plurality of arch, it is protruding to be the integrated into one piece structure with rubber circle (13), ash blocking plate (14) surface is the annular equidistance and has seted up a plurality of and protruding matched with pinhole, the arch is pasted in the pinhole through glue.

3. The board for junior middle school mathematics teaching drawing as claimed in claim 1, wherein: one end outer surface of the shielding cylinder (8) close to the vertical plate (6) is fixedly connected with a ring edge (12), and the ring edge (12) is fixedly connected with the vertical plate (6) through a screw.

4. The board for junior middle school mathematics teaching drawing as claimed in claim 1, wherein: two limiting frames (4) are symmetrically arranged on the upper surface of the base (5), and balancing weights (2) are arranged in the limiting frames (4).

5. The board for junior middle school mathematics teaching drawing as claimed in claim 1, wherein: four wheels (3) are installed on the lower surface of the base (5), and the four wheels (3) are respectively arranged at four corners of the lower surface of the base (5).

6. The board for junior middle school mathematics teaching drawing as claimed in claim 1, wherein: one side fixedly connected with set square that riser (6) deviate from backup pad (7), set square and drawing board (1) fixed connection.