CN219856598U

CN219856598U - Compass convenient to adjust

Info

Publication number: CN219856598U
Application number: CN202320838713.XU
Authority: CN
Inventors: 张国栋
Original assignee: Tianjin Mingpai Technology Co ltd
Current assignee: Tianjin Mingpai Technology Co ltd
Priority date: 2023-04-16
Filing date: 2023-04-16
Publication date: 2023-10-20
Anticipated expiration: 2033-04-16

Abstract

The utility model relates to the technical field of teaching aids and discloses a pair of compasses convenient to adjust, which comprises a barrel, a sliding sleeve and a movable block, wherein the sliding sleeve is in sliding connection with the surface of the barrel, one side of the sliding sleeve is bolted with a long plate, the surface of the long plate is provided with scale marks, the top surface of the barrel is provided with a movable rod in a penetrating way, the movable rod is in sliding connection with the penetrating part of the barrel, and the bottom end of the movable rod is fixedly provided with a movable sheet; according to the utility model, the movable rod, the movable piece and the piston are driven to move by pulling the pull plate, so that the inside of the cylinder body is in a relatively low pressure state, the sucking disc is adsorbed and fixed on the surface of the blackboard under the action of the internal and external air pressure difference, the compasses are fixed on the surface of the blackboard, the physical consumption of teachers is reduced, and in the radius adjusting process, the movable block is pushed to slide along the surface of the long plate, and the reading of the indication arrow aiming at the scale mark is observed for adjustment, so that a ruler is not needed to be held in the adjusting process, and the adjustment is more convenient.

Description

Compass convenient to adjust

Technical Field

The utility model relates to the technical field of teaching aids, in particular to a pair of compasses convenient to adjust.

Background

The mathematics education plays an important role in the future study of students, and students can exercise the thinking ability of the students when learning the mathematics, and meanwhile, the quality and the bad quality of the mathematics study play a vital role in the study of the student's physical engineering discipline. In the current mathematical education, a teacher needs to draw a circle on a blackboard frequently, compasses are needed in the process of drawing a circle, the existing compasses mostly adopt compasses points as fulcrums, the teacher needs to use two hands to fixedly support two supporting legs of the compasses in the process of drawing a circle on the blackboard, a great deal of physical strength is consumed in the process, and sometimes, the teacher needs to draw a circle with a specified radius on the blackboard because of teaching requirements, so that the teacher needs to hold the compasses with one hand and the other hand to hold the size to measure the distance between the chalk and the compasses points, and the adjustment is very inconvenient.

Disclosure of Invention

The utility model aims to provide the compass which is convenient to adjust, has more convenient radius adjustment and can fix the compass on the surface of a blackboard.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a compasses convenient to adjust, includes barrel, sliding sleeve and movable block, sliding sleeve and the surface sliding connection of barrel, one side bolt of sliding sleeve has the rectangular board, the surface of rectangular board is provided with the scale mark, the top surface of barrel runs through and is provided with movable rod, and movable rod and the department sliding connection that runs through of barrel, the bottom mounting of movable rod has movable piece, and movable piece and the inner wall sliding connection of barrel, the bottom of movable piece is fixed with the piston, the top of movable rod is fixed with the arm-tie, the surface of movable block runs through and is provided with the spout, and the inner wall of spout and the surface sliding connection of rectangular board, the front of movable block runs through and has seted up the viewing aperture, the below of viewing aperture is provided with the instruction arrow, the surface and the inside of movable block are provided with locating component, the below of movable block is provided with chalk fixed subassembly.

Preferably, the locating component comprises a movable sleeve, a vertical rod, a pressing plate and an upper connecting plate, wherein the movable sleeve is bolted above the back of the movable block, the vertical rod is in sliding connection with the inner wall of the movable sleeve, the pressing plate is bolted on the top end of the vertical rod, the number of the upper connecting plates is two, the upper connecting plates are fixed on two sides of the vertical rod, compression springs are fixed on the bottom of the upper connecting plates, lower connecting plates are respectively bolted on two sides below the back of the movable block, the other ends of the compression springs are fixed with the lower connecting plates, a fixing plate is bolted on the bottom end of the vertical rod, a sliding block is bolted on the other side of the top surface of the fixing plate, a vertical groove is further penetrated and formed in the bottom of the movable block, the vertical groove is mutually communicated with the sliding groove, the sliding block is in sliding connection with the inner wall of the vertical groove, and rubber blocks are adhered on the top surface of the sliding block.

Preferably, the top of the rubber block is also provided with anti-skid ridges, and the number of the anti-skid ridges is a plurality of the anti-skid ridges and the anti-skid ridges are equidistantly arranged.

Preferably, the chalk fixing assembly comprises a fixing rod, a pen container, a threaded hole, a knob bolt and a rubber sheet, wherein one end of the fixing rod is bolted with the movable block, the pen container is bolted at the bottom end of the fixing rod, the threaded hole is formed in the surface of the pen container in a penetrating mode, and the knob bolt is in threaded connection with the inner wall of the threaded hole.

Preferably, an air inlet pipe is communicated with one side below the surface of the cylinder body, and a valve is fixed on the surface of the air inlet pipe.

Preferably, a limiting block is also bolted to one side of the long plate, and the lateral area of the limiting block is larger than the cross-sectional area of the long plate.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the movable rod, the movable piece and the piston are driven to move by pulling the pull plate, so that the inside of the cylinder body is in a relatively low pressure state, the sucking disc is adsorbed and fixed on the surface of the blackboard under the action of the internal and external air pressure difference, the compasses are fixed on the surface of the blackboard, the physical consumption of teachers is reduced, and in the radius adjusting process, the movable block is pushed to slide along the surface of the long plate, and the reading of the indication arrow aiming at the scale mark is observed for adjustment, so that a ruler is not needed to be held in the adjusting process, and the adjustment is more convenient.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a partial structure of the present utility model;

FIG. 3 is a schematic view of the chalk fixing assembly of the present utility model;

FIG. 4 is a schematic cross-sectional view of a cylinder according to the present utility model;

FIG. 5 is a schematic view of the structure of the movable block and its surface in the present utility model;

FIG. 6 is a schematic view of a positioning assembly according to the present utility model;

FIG. 7 is a schematic cross-sectional view of a movable block according to the present utility model;

fig. 8 is a schematic structural view of a positioning assembly according to the present utility model.

In the figure: 1. a cylinder; 2. a sliding sleeve; 3. a long plate; 4. scale marks; 5. a movable rod; 6. a movable plate; 7. a piston; 8. a suction cup; 9. pulling a plate; 10. a movable block; 11. a chute; 12. a positioning assembly; 1201. a movable sleeve; 1202. a vertical rod; 1203. pressing the plate; 1204. an upper connecting plate; 1205. a compression spring; 1206. a lower connecting plate; 1207. a fixing plate; 1208. a slide block; 1209. a vertical groove; 1210. a rubber block; 1211. an anti-slip ridge; 13. an observation port; 14. an indication arrow; 15. a chalk fixing assembly; 151. a fixed rod; 152. a pen container; 153. a threaded hole; 154. a knob bolt; 155. a rubber sheet; 16. an air inlet pipe; 17. a valve; 18. and a limiting block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-8, a pair of compasses convenient to adjust includes a barrel 1, a sliding sleeve 2 and a movable block 10, the sliding sleeve 2 is slidably connected with the surface of the barrel 1, one side of the sliding sleeve 2 is bolted with a long plate 3, the surface of the long plate 3 is provided with a scale mark 4, the initial value of the scale mark 4 needs to be less than the distance between the long plate 3 and the center of the barrel 1 so as to avoid larger errors, the top surface of the barrel 1 is provided with a movable rod 5 in a penetrating way, the movable rod 5 is slidably connected with the penetrating part of the barrel 1, the bottom end of the movable rod 5 is fixedly provided with a movable piece 6, the movable piece 6 is slidably connected with the inner wall of the barrel 1, the bottom of the movable piece 6 is fixedly provided with a piston 7, the top end of the movable rod 5 is fixedly provided with a pull plate 9, the surface of the movable block 10 is provided with a chute 11 in a penetrating way, the inner wall of the chute 11 is slidably connected with the surface of the long plate 3, the front surface of the movable block 10 is provided with an observation port 13, an indication arrow 14 is arranged below the observation port 13, the surface and the inside of the movable block 10 is provided with a positioning component 12, and a fixing component 15 is arranged below the movable block 10.

The positioning assembly 12 comprises a movable sleeve 1201, a vertical rod 1202, a pressing plate 1203 and an upper connecting plate 1204, wherein the movable sleeve 1201 is bolted above the back surface of the movable block 10, the vertical rod 1202 is in sliding connection with the inner wall of the movable sleeve 1201, the pressing plate 1203 is bolted at the top end of the vertical rod 1202, the upper connecting plate 1204 is two in number and is fixed at two sides of the vertical rod 1202, the bottom of the upper connecting plate 1204 is fixed with a compression spring 1205, two sides below the back surface of the movable block 10 are both bolted with a lower connecting plate 1206, the other end of the compression spring 1205 is fixed with the lower connecting plate 1206, the bottom end of the vertical rod 1202 is bolted with a fixed plate 1207, the other side of the top surface of the fixed plate 1207 is bolted with a sliding block 1208, the bottom of the movable block 10 is also penetrated and provided with a vertical groove 1209, the vertical groove 1209 is communicated with the sliding groove 11, the sliding block 1208 is slidingly connected with the inner wall of the vertical groove 1209, the top surface of the sliding block 1208 is adhered with a rubber block 1210, in use, as lower link 1206 is bolted to movable block 10, compression spring 1205 applies an upward reaction force to upper link 1204, and drives the vertical rod 1202, the fixed plate 1207 and the sliding block 1208 upwards, the sliding block 1208 upwards along the inner wall of the vertical groove 1209, and the rubber block 1210 is attached to the bottom surface of the long plate 3, positioning the movable block 10 is completed under the action of friction force between the rubber block 1210 and the long plate 3, so that the movable block 10 is not easy to move after staying, if the movable block 10 needs to be moved, only the pressing plate 1203 needs to be pressed down, the pressing plate 1203 drives the vertical rod 1202 to slide downwards along the inner wall of the sliding sleeve 2, the vertical bar 1202 then moves the fixing plate 1207, the sliding block 1208 and the rubber block 1210 downward to release the positioning, to move the movable block 10, the top of the rubber block 1210 is also provided with an anti-slip ridge 1211, the number of the anti-skid ribs 1211 is a plurality of the anti-skid ribs 1211 which are equidistantly arranged, so that the anti-skid ribs 1211 have the function of increasing friction force and improve the positioning effect.

The chalk fixing assembly 15 comprises a fixing rod 151, a pen container 152, a threaded hole 153, a knob bolt 154 and a rubber sheet 155, wherein one end of the fixing rod 151 is in bolting with the movable block 10, the pen container 152 is in bolting with the bottom end of the fixing rod 151, the threaded hole 153 penetrates through the surface of the pen container 152, the knob bolt 154 is in threaded connection with the inner wall of the threaded hole 153, chalk is plugged into the pen container 152, then the knob bolt 154 is rotated, the chalk is gradually deepened under the action of the threaded hole 153, the rubber sheet 155 is attached to the surface of the chalk to position the chalk, the chalk is positioned with the movable block 10, an air inlet pipe 16 is arranged on one side below the surface of the cylinder 1 in a communicating manner, a valve 17 is fixed on the surface of the air inlet pipe 16, after circle drawing is completed, if the compasses are required to be removed, the valve 17 can be opened to enable air to enter the cylinder 1 to balance internal and external air pressure differences, the sucker 8 is released from being fixed with the blackboard, one side of the long plate 3 is also bolted with a limiting block 18, the lateral area of the limiting block 18 is larger than the cross-section area of the long plate 3, and the limiting block 18 can prevent the movable block 10 from being separated from the surface of the long plate 3.

Working principle: in the use process, firstly, the chalk and the movable block 10 are fixed through the chalk fixing component 15, then the movable block 10 is moved on the surface of the long plate 3, the reading pointed by the indication arrow 14 is observed, meanwhile, the observation port 13 is convenient for a teacher to observe the reading so as to observe and adjust, the ruler is not needed to be held by the other hand to carry out measurement, the whole compass is convenient to be taken at the same time, the sucker 8 is aligned to the circle center position, then the sucker 8 is attached to the surface of the blackboard, the pulling plate 9 is pulled, the movable rod 5, the movable piece 6 and the piston 7 are driven to move together, the external force forces the volume of air in the needle tube to be increased, the pressure in the barrel 1 is reduced, a pressure difference is formed between the external atmospheric pressure and the pressure, the pressure difference is led to the barrel 1 and the sucker 8, the sucker 8 is tightly attached to the surface of the blackboard under the action of the pressure difference, the compass is fixed with the blackboard, the burden of the teacher is relieved, the teacher only needs to push the long plate 3 by the hand in the circle drawing process, and the sliding sleeve 2 is in sliding connection with the surface of the barrel 1, so that the sliding sleeve 2 can rotate, the long plate 3 drives the movable block 10 to move together, and the chalk can be drawn circularly.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a compasses convenient to adjust, includes barrel (1), sliding sleeve (2) and movable block (10), its characterized in that: the chalk comprises a barrel body (1), a sliding sleeve (2) and the barrel body (1), wherein a long plate (3) is bolted to one side of the sliding sleeve (2), a scale mark (4) is arranged on the surface of the long plate (3), a movable rod (5) is arranged on the top surface of the barrel body (1) in a penetrating mode, the movable rod (5) and the barrel body (1) are in sliding connection at the penetrating position, a movable piece (6) is fixed to the bottom of the movable rod (5) and is in sliding connection with the inner wall of the barrel body (1), a piston (7) is fixed to the bottom of the movable piece (6), a pulling plate (9) is fixed to the top end of the movable rod (5), a sliding groove (11) is arranged on the surface of the movable block (10) in a penetrating mode, an observation opening (13) is formed in the front surface of the movable block (10) in a penetrating mode, an indication arrow (14) is arranged below the observation opening (13), a positioning component (12) is arranged on the surface of the movable block (10), and a chalk component (15) is fixed to the bottom of the movable block (10).

2. An adjustable compasses according to claim 1, wherein: the positioning assembly (12) comprises a movable sleeve (1201), vertical rods (1202), pressing plates (1203) and an upper connecting plate (1204), wherein the movable sleeve (1201) is bolted above the back of a movable block (10), the vertical rods (1202) are slidably connected with the inner wall of the movable sleeve (1201), the pressing plates (1203) are bolted at the top ends of the vertical rods (1202), the number of the upper connecting plates (1204) is two, the two sides of the vertical rods (1202) are fixedly provided with compression springs (1205), the two sides of the back lower part of the movable block (10) are respectively bolted with a lower connecting plate (1206), the other ends of the compression springs (1205) are fixedly connected with the lower connecting plate (1206), the bottom ends of the vertical rods (1202) are bolted with sliding blocks (1207), the bottom of the movable block (10) is also provided with vertical grooves (1209) in a penetrating mode, the vertical grooves (1209) are communicated with the sliding blocks (1208), and the inner walls (1208) of the vertical grooves (1208) are fixedly connected with the sliding blocks (1209).

3. An adjustable compasses according to claim 2, wherein: the top of the rubber block (1210) is also provided with anti-skid ribs (1211), and the number of the anti-skid ribs (1211) is a plurality of the anti-skid ribs which are equidistantly arranged.

4. An adjustable compasses according to claim 1, wherein: the chalk fixing assembly (15) comprises a fixing rod (151), a pen container (152), a threaded hole (153), a knob bolt (154) and a rubber sheet (155), one end of the fixing rod (151) is bolted with the movable block (10), the pen container (152) is bolted at the bottom end of the fixing rod (151), the threaded hole (153) penetrates through the surface of the pen container (152), and the knob bolt (154) is in threaded connection with the inner wall of the threaded hole (153).

5. An adjustable compasses according to claim 1, wherein: an air inlet pipe (16) is communicated with one side below the surface of the cylinder body (1), and a valve (17) is fixed on the surface of the air inlet pipe (16).

6. An adjustable compasses according to claim 1, wherein: one side of the long plate (3) is also bolted with a limiting block (18), and the lateral area of the limiting block (18) is larger than the cross-sectional area of the long plate (3).