CN214449837U - Compasses with telescopic machanism for mathematics - Google Patents

Abstract

The utility model discloses a compasses is used to mathematics with telescopic machanism, which comprises a rotating shaft, pivot bottom fixedly connected with U-shaped plate, the pivot top is equipped with first action bars, the first gag lever post of first action bars bottom fixedly connected with, pivot and U-shaped plate are run through to first gag lever post bottom, and extend to U-shaped plate inner chamber to the first fixture block of fixedly connected with. The utility model discloses a setting of connecting rod and telescopic link, the user outwards pulls the action bars, and the arc piece leaves the draw-in groove, then to lifting the action bars, and the action bars drives rectangular block upward movement, and the rectangular block drives first connecting rod and rises and rotate, and first connecting rod drives third connecting rod left end to the left-hand rotation, and the third connecting rod drives second connecting rod left end to the left-hand rotation, and the third connecting rod drives the slider, and the slider drives the telescopic link extension, adjusts the landing leg length that needs, and it is lighter to draw the circle.

Description

Compasses with telescopic machanism for mathematics

Technical Field

The utility model relates to a compasses technical field specifically is a compasses for mathematics with telescopic machanism.

Background

Compasses are used for drawing circles or chords in mathematics and drawing, are commonly used for ruler drawing, are very important in mathematics teaching aids in compasses, are very commonly used in teaching, and teachers can visualize complex mathematical knowledge through the compasses drawing, so that students can better understand the knowledge points of circle chords.

However, the length of the support legs of the existing compasses is fixed, when a larger circle is drawn, the fulcrum of the compasses is unstable, the two support legs shake to cause the change of the angle, and drawing is influenced, so that the teaching process is influenced, and in order to solve the existing problems, the compasses with the telescopic mechanism for mathematics are needed.

Disclosure of Invention

The utility model provides a technical problem lie in overcoming prior art's the fixed defect of landing leg length, provide a compasses for mathematics with telescopic machanism. The mathematical compasses with the telescopic mechanism have the characteristics of adjustable leg length and the like.

In order to achieve the above object, the utility model provides a following technical scheme: a compasses with a telescopic mechanism for mathematics comprises a rotating shaft, wherein a U-shaped plate is fixedly connected to the bottom of the rotating shaft, a first operating rod is arranged at the top of the rotating shaft, a first limiting rod is fixedly connected to the bottom of the first operating rod, the bottom end of the first limiting rod penetrates through the rotating shaft and the U-shaped plate and extends to an inner cavity of the U-shaped plate, a first clamping block is fixedly connected to the bottom of the first limiting rod, a first spring is sleeved on the position, close to the bottom, of the first limiting rod, the top end of the first spring is fixedly connected to the top of the inner cavity of the U-shaped plate, a first supporting leg is fixedly connected to the front side of the inner cavity of the U-shaped plate, a bearing is fixedly connected to the rear side of the first supporting leg, a rotating rod is fixedly connected to the inner cavity of the bearing, a gear is sleeved on the position, close to the bearing, of the inner cavity of the U-shaped plate, a second supporting leg is arranged on the position, the rear end of the rotating rod penetrates through the second supporting leg and extends to the rear side of the second supporting leg and is movably connected to the rear side wall of the inner cavity of the U-shaped plate, the chalk box is characterized in that a fulcrum is fixedly connected to the bottom end of the first supporting leg, a telescopic rod is arranged in an inner cavity of the second supporting leg, the bottom end of the telescopic rod penetrates through the second supporting leg and extends to the outer side of the second supporting leg, an opening is formed in the bottom end of the telescopic rod, chalk is inserted into the opening, and a telescopic mechanism is arranged between the first supporting leg and the second supporting leg.

Preferably, telescopic machanism includes the movable block, the movable block is located first landing leg left side, movable block rear side swing joint has first connecting rod, movable block one end swing joint has the third connecting rod is kept away from to first connecting rod, first landing leg left side is close to top fixedly connected with fixed block department, fixed block rear side swing joint has the second connecting rod, fixed block one end swing joint is kept away from to the second connecting rod at third connecting rod rear side, first connecting rod one end swing joint has the slider to be kept away from to the third connecting rod, first spout has been seted up to second landing leg right side lateral wall, the slider runs through first spout, and extends to second landing leg inner chamber to fixed connection is on the telescopic link.

Preferably, first leg right side is equipped with the third action bars, third action bars left side fixedly connected with second gag lever post, first leg inner chamber is close to below department and has seted up the draw-in groove, the first landing leg is run through to the second gag lever post left end, and extends to the draw-in groove inner chamber to fixedly connected with second fixture block, the second gag lever post is close to left end department cover and is equipped with the second spring, second spring right-hand member fixed connection is at draw-in groove inner chamber right side lateral wall.

Preferably, a second sliding groove is formed in the front side of the first support leg, and a third sliding groove is formed in the left side of the first support leg.

Preferably, first leg front side is equipped with the second action bars, second action bars rear side fixedly connected with movable rod, the movable rod rear end runs through the second spout, and extends to first leg inner chamber to fixedly connected with arc piece, movable rod left side fixedly connected with connecting rod, the connecting rod left end runs through the third spout, and extends to the third spout outside to fixed connection is on the movable block.

Preferably, the rotating shaft is provided with anti-skid particles, and the anti-skid particles are provided with anti-skid grains.

Preferably, the bottom end of the first clamping block is inserted between the gear blocks of the gear.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a setting of connecting rod and telescopic link, the user outwards pulls the action bars, and the arc piece leaves the draw-in groove, then to lifting the action bars, and the action bars drives rectangular block upward movement, and the rectangular block drives first connecting rod and rises and rotate, and first connecting rod drives third connecting rod left end to the left-hand rotation, and the third connecting rod drives second connecting rod left end to the left-hand rotation, and the third connecting rod drives the slider, and the slider drives the telescopic link extension, adjusts the landing leg length that needs, and it is lighter to draw the circle.

2. The utility model discloses a setting of fixture block and gear, the user upwards moves the action bars, and the action bars drives the gag lever post, and the gag lever post drives the fixture block, and fixture block compression spring has adjusted required landing leg length after, and the spring reconversion drives the fixture block downstream, and the fixture block is pegged graft between the tooth piece of gear, and the angle between two landing legs is fixed, and the landing leg can not rock change angle when drawing the circle, influences the mapping.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a right side view of the present invention.

Fig. 3 is a schematic diagram of the structure of the fixture block of the present invention.

Fig. 4 is a schematic view of the gear structure of the present invention.

Fig. 5 is an enlarged view of a portion a in fig. 1 according to the present invention.

Reference numbers in the figures: 1. a rotating shaft; 2. a U-shaped plate; 3. a first operating lever; 4. a first limit rod; 5. a first spring; 6. a first clamping block; 7. a first leg; 8. a fulcrum; 9. a second limiting rod; 10. a second spring; 11. a second fixture block; 12. a card slot; 13. a second operating lever; 14. a movable rod; 15. an arc-shaped block; 16. a gear; 17. a first link; 18. a second link; 19. a third link; 20. a second leg; 21. a telescopic rod; 22. chalk; 23. a third operating lever; 24. a movable block; 25. a slide block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a mathematics compass with a telescopic mechanism comprises a rotating shaft 1, wherein anti-skid particles are arranged on the rotating shaft 1, anti-skid grains are arranged on the anti-skid particles, the bottom of the rotating shaft 1 is fixedly connected with a U-shaped plate 2, the top of the rotating shaft 1 is provided with a first operating rod 3, the bottom of the first operating rod 3 is fixedly connected with a first limiting rod 4, the bottom end of the first limiting rod 4 penetrates through the rotating shaft 1 and the U-shaped plate 2 and extends to the inner cavity of the U-shaped plate 2 and is fixedly connected with a first clamping block 6, the bottom end of the first clamping block 6 is inserted between tooth blocks of a gear 16, a first spring 5 is sleeved at the position of the first limiting rod 4 close to the bottom end, the top end of the first spring 5 is fixedly connected to the top of the inner cavity of the U-shaped plate 2, the front side of the inner cavity of the U-shaped plate 2 is fixedly connected with a first supporting leg 7, the front side of the first supporting leg 7 is provided with a second chute, the left side of the first supporting leg 7 is provided with a third chute, the front side of the first supporting leg 7 is provided with a second operating rod 13, a movable rod 14 is fixedly connected with the rear side of a second operating rod 13, the rear end of the movable rod 14 penetrates through a second sliding groove and extends to the inner cavity of the first leg 7 and is fixedly connected with an arc-shaped block 15, the left side of the movable rod 14 is fixedly connected with a connecting rod, the left end of the connecting rod penetrates through a third sliding groove and extends to the outer side of the third sliding groove and is fixedly connected with a movable block 24, the right side of the first leg 7 is provided with a third operating rod 23, the left side of the third operating rod 23 is fixedly connected with a second limiting rod 9, the inner cavity of the first leg 7 is provided with a clamping groove 12 near the lower part, the left end of the second limiting rod 9 penetrates through the first leg 7 and extends to the inner cavity of the clamping groove 12 and is fixedly connected with a second clamping block 11, the second limiting rod 9 is sleeved with a second spring 10 near the left end, the right end of the second spring 10 is fixedly connected with the right side wall of the inner cavity of the clamping groove 12, the rear side of the first leg 7 is fixedly connected with a bearing, the inner cavity is fixedly connected with a rotating rod, a gear 16 is sleeved at the position of the rotating rod close to the bearing, a second supporting leg 20 is arranged at the position of the inner cavity of the U-shaped plate 2 close to the rear side, the rear end of the rotating rod penetrates through the second supporting leg 20 and extends to the rear side of the second supporting leg 20 and is movably connected to the side wall of the rear side of the inner cavity of the U-shaped plate 2, a supporting point 8 is fixedly connected to the bottom end of the first supporting leg 7, an expansion link 21 is arranged in the inner cavity of the second supporting leg 20, the bottom end of the expansion link 21 penetrates through the second supporting leg 20 and extends to the outer side of the second supporting leg 20, an opening is formed in the bottom end of the expansion link 21, chalk 22 is inserted into the opening, a telescopic mechanism is arranged between the first supporting leg 7 and the second supporting leg 20 and comprises a movable block 24, the movable block 24 is positioned at the left side of the first supporting leg 7, a first connecting rod 17 is movably connected to the rear side of the movable block 24, a third connecting rod 19 is movably connected to the end of the first connecting rod 17 far away from the movable block 24, a fixed block is fixedly connected to the left side of the first supporting leg 7 close to the upper part, fixed block rear side swing joint has second connecting rod 18, and fixed block one end swing joint is kept away from at third connecting rod 19 rear side to second connecting rod 18, and first connecting rod 17 one end swing joint has slider 25 is kept away from to third connecting rod 19, and first spout has been seted up to the lateral wall on second landing leg 20 right side, and slider 25 runs through first spout, and extends to the 20 inner chambers of second landing leg to fixed connection is on telescopic link 21.

The working principle is as follows: when the utility model is used, firstly, the user pulls the third operating rod 23 rightwards, the third operating rod 23 drives the second limiting rod 9 rightwards, the second limiting rod 9 drives the second clamping block 11 rightwards, the second clamping block 11 compresses the second spring 10, the second clamping block 11 is far away from the arc-shaped block 15, the second operating rod 13 is pulled forwards and the third operating rod 23 is loosened, the second operating rod 13 drives the movable rod 14 to move forwards, the movable rod 14 drives the arc-shaped block 15 to move forwards and leave the clamping groove 12, when the second operating rod 13 is lifted upwards, the second operating rod 13 drives the movable rod 14 to move upwards, the movable rod 14 drives the connecting rod to move upwards, thereby driving the movable block 24 to move upwards, the movable block 24 drives the first connecting rod 17 to rotate, the first connecting rod 17 drives the third connecting rod 19 to move leftwards, the third connecting rod 19 drives the second connecting rod 18 to rotate leftwards, the left end of the third connecting rod 19 drives the sliding block 25 to slide in the first chute inner cavity, the slide block 25 drives the telescopic rod 21 to move leftwards and downwards, the telescopic rod 21 extends, meanwhile, the second supporting leg 20 drives the rotating rod to rotate, the rotating rod drives the gear 16 to rotate, the gear 16 drives the first clamping block 6 to move upwards, the first clamping block 6 compresses the first spring 5, the first clamping block 6 drives the first limiting rod 4 to move upwards, the first limiting rod 4 drives the first operating rod 3 to move upwards, when the required length of the telescopic rod 21 and the angle between the first supporting leg 7 and the second supporting leg 20 are adjusted, the first spring 5 is compressed to restore to the original state to drive the first clamping block 6 to move downwards to be inserted between the tooth blocks of the gear 16, the angle between the first supporting leg 7 and the second supporting leg 20 is fixed with the length, drawing can be carried out, after drawing is finished, the first operating rod 3 is lifted upwards, the first operating rod 3 drives the first limiting rod 4 to move upwards, the first limiting rod 4 drives the first clamping block 6 to move upwards, thereby compressing the first spring 5, then pressing the second operating rod 13 downwards, the second operating rod 13 driving the movable rod 14 to move downwards, the movable rod 14 driving the connecting rod to move downwards, thereby driving the movable block 24 to move downwards, the movable block 24 driving the first connecting rod 17 to rotate, the first connecting rod 17 driving the third connecting rod 19 to move rightwards, the third connecting rod 19 driving the second connecting rod 18 to rotate rightwards, the left end of the third connecting rod 19 driving the sliding block 25 to slide in the first chute cavity, the sliding block 25 driving the telescopic rod 21 to move rightwards and upwards, the telescopic rod 21 shortening, the length of the second leg 20 shortening and returning to the original position, finally pressing the second operating rod 13 backwards, the second operating rod 13 driving the movable rod 14 to move backwards, the movable rod 14 driving the arc-shaped block 15 to move backwards, the arc-shaped block 15 driving the second block 11 to move rightwards, the second block 11 driving the second limit rod 9, the second block 11 moving rightwards compressing the second spring 10, arc piece 15 removes 11 rear sides of second fixture block, and second fixture block 11 is in draw-in groove 12 inner chambers with arc piece 15 card, and the angle and the length of this device are fixed at initial position, and the different length of second landing leg 20 can be adjusted as required to the angle to this device, fixes angle and length simultaneously, and is more stable when drawing.

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

Claims (7)

1. The utility model provides a compasses for mathematics with telescopic machanism, includes pivot (1), its characterized in that: the bottom of the rotating shaft (1) is fixedly connected with a U-shaped plate (2), the top of the rotating shaft (1) is provided with a first operating rod (3), the bottom of the first operating rod (3) is fixedly connected with a first limiting rod (4), the bottom end of the first limiting rod (4) penetrates through the rotating shaft (1) and the U-shaped plate (2) and extends to the inner cavity of the U-shaped plate (2) and is fixedly connected with a first clamping block (6), a first spring (5) is sleeved at the position, close to the bottom, of the first limiting rod (4), the top end of the first spring (5) is fixedly connected to the top of the inner cavity of the U-shaped plate (2), a first supporting leg (7) is fixedly connected to the front side of the inner cavity of the U-shaped plate (2), a bearing is fixedly connected to the rear side of the first supporting leg (7), a rotating rod is fixedly connected with the inner cavity of the bearing, a gear (16) is sleeved at the position, a second supporting leg (20) is arranged at the position, close to the rear side, of the inner cavity of the U-shaped plate (2), the utility model discloses a chalk, including bull stick (2), first landing leg (7), first landing leg (20), telescopic link (21), bull stick rear end runs through second landing leg (20), and extends to second landing leg (20) rear side to swing joint is at U-shaped plate (2) inner chamber rear side lateral wall, first landing leg (7) bottom fixedly connected with fulcrum (8), second landing leg (20) inner chamber is equipped with telescopic link (21), second landing leg (20) are run through to telescopic link (21) bottom, and extend to the second landing leg (20) outside, the opening has been seted up to telescopic link (21) bottom, chalk (22) have been pegged graft to the opening part, be equipped with telescopic machanism between first landing leg (7) and second landing leg (20).

2. The mathematical compass with a telescopic mechanism of claim 1, wherein: the telescopic mechanism comprises a movable block (24), the movable block (24) is positioned at the left side of the first supporting leg (7), a first connecting rod (17) is movably connected at the rear side of the movable block (24), a third connecting rod (19) is movably connected at one end of the first connecting rod (17) far away from the movable block (24), a fixed block is fixedly connected at the left side of the first supporting leg (7) close to the upper part, a second connecting rod (18) is movably connected at the rear side of the fixed block, one end of the second connecting rod (18) far away from the fixed block is movably connected with the rear side of the third connecting rod (19), one end of the third connecting rod (19) far away from the first connecting rod (17) is movably connected with a sliding block (25), a first sliding groove is arranged on the side wall of the right side of the second supporting leg (20), the sliding block (25) penetrates through the first sliding groove, and extends to the inner cavity of the second supporting leg (20) and is fixedly connected to the telescopic rod (21).

3. The mathematical compass with a telescopic mechanism of claim 1, wherein: first landing leg (7) right side is equipped with third action bars (23), third action bars (23) left side fixedly connected with second gag lever post (9), draw-in groove (12) have been seted up to first landing leg (7) inner chamber near below department, first landing leg (7) inner chamber is run through to second gag lever post (9) left end, and extends to draw-in groove (12) inner chamber to fixedly connected with second fixture block (11), second gag lever post (9) are close to left end department cover and are equipped with second spring (10), second spring (10) right-hand member fixed connection is at draw-in groove (12) inner chamber right side lateral wall.

4. The mathematical compass with a telescopic mechanism of claim 1, wherein: a second sliding groove is formed in the front side of the first supporting leg (7), and a third sliding groove is formed in the left side of the first supporting leg (7).

5. The mathematical compass with a telescopic mechanism of claim 1, wherein: first landing leg (7) front side is equipped with second action bars (13), second action bars (13) rear side fixedly connected with movable rod (14), second spout is run through to movable rod (14) rear end, and extends to first landing leg (7) inner chamber to fixedly connected with arc piece (15), movable rod (14) left side fixedly connected with connecting rod, the connecting rod left end runs through the third spout, and extends to the third spout outside to fixed connection is on movable block (24).

6. The mathematical compass with a telescopic mechanism of claim 1, wherein: the rotating shaft (1) is provided with anti-skid particles, and anti-skid grains are arranged on the anti-skid particles.

7. The mathematical compass with a telescopic mechanism of claim 1, wherein: the bottom end of the first clamping block (6) is inserted between the tooth blocks of the gear (16).

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