CN205185670U - Inclined plane rail groove through -hole corner activity teaching set square - Google Patents
Inclined plane rail groove through -hole corner activity teaching set square Download PDFInfo
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- CN205185670U CN205185670U CN201520916375.2U CN201520916375U CN205185670U CN 205185670 U CN205185670 U CN 205185670U CN 201520916375 U CN201520916375 U CN 201520916375U CN 205185670 U CN205185670 U CN 205185670U
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Abstract
The utility model relates to a special set square in the teaching, an inclined plane rail groove through -hole corner activity teaching set square, as the improvement: the through -hole that slides on the plane under the slide has limit chi step hole on the plane on the chi of limit, there is the inclined plane protruding rail under the slide on the plane, has the inclined plane recess on the chi of limit on the plane, there is the corner eyehole under the slide on the plane, has the corner scale on the chi of limit on the plane, the length scale is still being engraved on the inboard scaled slope in plane on the chi of limit on the scale slope, having step hole plane on the chi step hole of limit, having screw stub end and screw cylindrical section on the stepped screw, it is screw step face that the position is connected with the screw cylindrical section to the screw stub end, and disc spring is last to have butterfly spring outer loop and butterfly spring spoke, and butterfly spring outer loop is fixed in the contained angle department between limit chi step hole and the step hole plane, and butterfly spring spoke is holding in the palm screw step face, the stepped screw passes through rotatory through -hole and limit chi step hole, butterfly nut and the cooperation of stepped screw external screw thread end in proper order.
Description
Technical field
The utility model relates to the upper Special triangular ruler of a kind of teaching, and International Classification of Patents is B43L, particularly relates to a kind of inclined-plane rail groove through hole corner activity teaching set square.
Background technology
Mathematics is one of important subject, and in Junior Mathematics, triangle geometry is most important.Learning triangle geometry well is junior middle school's plane geometry and even the most important basis of senior middle school's solid geometry.
At present, in teaching, the teaching aid of religion geometry has ruler, set square etc., and they exist many drawbacks: carry inconvenience, uses also inconvenient, prior or function singleness.When imparting knowledge to students drawing, user can only be online basic previous step one step draw figure required for oneself, drawing course is loaded down with trivial details, and it is not directly perceived, more can not training student association, analogy, observation and manipulative ability preferably, teacher should draw and say again, very busy, adds great work difficulty to education personnel.Chinese patent: the adjustable set square (patent No.: 2011200369592), but cannot accomplish that its three bars chi is at same plane, there is comparatively big error, another Chinese patent: the adjustable multipurpose four bar chi (patent No.: 2013201682530), also be to accomplish that its four bars chi is at same plane, still exists comparatively big error; Also has only one China patent: (patent No.: 2014208739549) remains and cannot accomplish that each ruler is at same plane, is all to there is comparatively big error multifunctional teaching gauge.
Summary of the invention
For above prior art Problems existing, the utility model adopts sliding bevel rail groove, set square is carried out to the design of isoplanar free of discontinuities adjustment, achieves the angle that sizes is different, can share a kind of inclined-plane rail groove through hole corner activity teaching set square, a step accurately puts in place.Specific as follows:
A kind of inclined-plane rail groove through hole corner activity teaching set square, comprise the first adjustable rule, the second adjustable rule and the 3rd adjustable rule that three physical dimensions are identical, every adjustable rule is made up of limit chi part and slippage part; First adjustable rule is made up of the first limit chi part and the first slippage part, and the second adjustable rule is made up of Second Edge chi part and the second slippage part, and the 3rd adjustable rule is made up of the 3rd limit chi part and the 3rd slippage part; Inclined plane groove in the first described limit chi part and between the inclined-plane protruding rail in the 3rd slippage part for being slidably matched, inclined plane groove in described Second Edge chi part and between the inclined-plane protruding rail in the first slippage part for being slidably matched, inclined plane groove in the 3rd described limit chi part and between the inclined-plane protruding rail in the second slippage part for being slidably matched, as improvement:
The lower surface of described slippage part is slide plate lower plane, and the upper surface of described limit chi part is plane on the chi of limit; Slide plate lower plane there is slippage through hole, limit chi plane has limit chi stepped hole; Slide plate lower plane there is inclined-plane protruding rail, plane has inclined plane groove with limit chi; Slide plate lower plane there is corner window, plane has corner scale with limit chi; On the chi of limit, planar inner has scale slope, and length scale is also engraved on scale slope;
Described limit chi stepped hole there is stepped hole plane, stepped screw there are screw stub end and screw cylindrical section, screw stub end and screw cylindrical section connecting portion are screw step surface, butterfly spring there are butterfly spring outer shroud and butterfly spring spoke, butterfly spring outer shroud is fixed on the angle between limit chi stepped hole and stepped hole plane, and screw step surface in the holder of butterfly spring spoke;
Described stepped screw passes through successively and rotates through hole and described limit chi stepped hole, wing nut coordinates with described stepped screw male end, to be overlapped on the chi of limit in plane by rotatable for slide plate lower plane, on described slide plate lower plane and described limit chi, plane is in sustained height, described stepped screw and rotate between through hole and limit chi stepped hole and be matched in clearance;
Plane has pearl seat stepped hole with described limit chi, and pearl seat stepped hole is arranged symmetrically in described inclined plane groove both sides, in pearl seat stepped hole, step has stepped hole plane, and stepped hole planar central has pearl seat blind hole; In sliding pearl seat, half is measure-alike with the outer half shape and structure of sliding pearl seat, all include sliding pearl seat cylindrical, sliding pearl seat faying face, sliding pearl seat lateral surface, sliding pearl seat faying face there is circular hole in sliding pearl seat, in sliding pearl seat, circular hole bottom is connected to sliding pearl seat internal taper hole stub end, and the little head end of sliding pearl seat internal taper hole is crossing with described sliding pearl seat lateral surface;
Described pearl seat stepped hole inner circle is fixed wtih the sliding pearl seat cylindrical in sliding pearl seat cylindrical in sliding pearl seat in half and the outer half of sliding pearl seat simultaneously, the sliding pearl seat internal taper hole in sliding pearl seat in half and be slidably matched between the sliding pearl seat internal taper hole sliding outside pearl seat in half and be fixed wtih slippage ball; In sliding pearl seat lateral surface on slippage ball in outstanding described sliding pearl seat in half, outstanding sphere is accommodated among described pearl seat blind hole; The outer outstanding sphere of the sliding pearl seat lateral surface on slippage ball in the outer half of outstanding described sliding pearl seat contacts with described slide plate lower plane.
As further improvement: on described limit chi, plane is 2.6 to 2.8 millimeters to the degree of depth of the groove-bottom plane of described inclined plane groove bottom surface, angle between the inclined-plane, both sides of described inclined plane groove and groove-bottom plane is 57 to 59 and spends, the groove-bottom plane width of described inclined plane groove bottom surface is 5.7 to 5.9 millimeters, on described limit chi, the both sides of plane and described inclined plane groove concave fluted fillet between face, and groove radius of corner is 0.4. to 0.6 millimeter.
As further improvement: the height of the protruding rail top plane above described slide plate lower plane to described inclined-plane protruding rail is 2.3 to 2.5 millimeters, angle between the both sides convex inclined plane of described inclined-plane protruding rail and protruding rail top plane is 57 to 59 and spends, and the protruding rail top plane width above described inclined-plane protruding rail is 5.3 to 5.5 millimeters; Have protruding rail fillet between the both sides convex inclined plane of described protruding rail top plane and described inclined-plane protruding rail, protruding rail radius of corner is 0.4. to 0.6 millimeter.
As further improvement: the angle on described scale slope and limit chi between plane is 44 to 46 to spend.
As further improvement: described length scale texture depth is 0.21 to 0.23 millimeter.
As further improvement: there is stepped hole angle face chi stepped hole both sides, limit, the angle between the stepped hole angle face of both sides is 58 to 60 degree.
the beneficial effects of the utility model:
One, slippage part is positioned at chi part one end, limit and is overlapped on plane in the chi part of limit, and on slide plate lower plane and limit chi, plane is in sustained height, guarantees that the length scale on three limits is all in same level, avoids error on line of sight; And the inclined-plane protruding rail on every adjustable rule and between the inclined plane groove on adjacent activities chi for being slidably matched, particularly plane there is limit chi corner scale corresponding in position with the corner window on slide plate lower plane, convenient, intuitively between control slippage part and limit chi part the anglec of rotation can be accomplished; Pearl seat stepped hole internal fixtion particularly on the chi of limit in plane slippage ball; The outer outstanding sphere of slippage ball contacts with described slide plate lower plane, makes plane on the limit chi in each portable plate more easily smooth relative to slippage between the slide plate lower plane in another portable plate; Butterfly spring outer shroud is fixed on the angle between limit chi stepped hole and stepped hole plane, and screw step surface in the holder of butterfly spring spoke; In conjunction with wing nut regulating action, guarantee on the limit chi in each portable plate rotatable under the state with frictional resistance between plane and the slide plate lower plane of self.
Two, the utility model adopts the portable composite construction of three group, disassembles, the size that takes up room is little, is easy to carry after convenient each use.
Three, education activities chi provided by the utility model, has structure simple, easy to use, possesses the advantages such as size, angle are changeable.
Accompanying drawing explanation
Fig. 1 is single outline drawing of the second adjustable rule 20 after the utility model is disassembled.
Fig. 2 is the A-A profile in Fig. 1.
Fig. 3 is the outline drawing of the second slippage part 28 in Fig. 1.
Fig. 4 is the isometric front view of Fig. 3.
Fig. 5 is the rear isometric view of Fig. 3.
Fig. 6 is the B-B sectional view in Fig. 3.
Fig. 7 is the outline drawing of Second Edge chi part 29 in Fig. 1.
Fig. 8 is the C-C sectional view in Fig. 7.
The outline drawing of equilateral triangle is developed into after the combination of Fig. 9 the utility model.
The outline drawing of isosceles triangle is developed into after the combination of Figure 10 the utility model.
The outline drawing of right angled triangle is developed into after the combination of Figure 11 the utility model.
The outline drawing of right angled isosceles triangle is developed into after the combination of Figure 12 the utility model.
Figure 13 is the second slippage part 28 in Fig. 9 to Figure 12 and the profile at position of matching between the 3rd limit chi part 39.
Figure 14 is the partial enlarged drawing at butterfly spring 110 position in Figure 13.
Figure 15 is the profile of the butterfly spring 110 in Figure 14.
Figure 16 is the side view of Figure 15.
Figure 17 is the partial enlarged drawing at slippage ball 80 position in Figure 13.
Figure 18 unloads the state diagram except sliding pearl seat after half 82 in the pearl seat stepped hole 58 in Figure 17.
Figure 19 is the partial enlarged drawing of the outer half 82 of sliding pearl seat in Figure 17.
Figure 20 unloads the state diagram except half 81 in sliding pearl seat and sliding pearl seat after half 82 in the pearl seat stepped hole 58 in Figure 17.
Detailed description of the invention
The utility model is described in detail below in conjunction with the drawings and specific embodiments:
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Figure 13 and Figure 14: a kind of inclined-plane rail groove through hole corner activity teaching set square, comprise the first identical adjustable rule 10, second adjustable rule 20 of three physical dimensions and the 3rd adjustable rule 30, every adjustable rule is made up of limit chi part and slippage part; First adjustable rule 10 is made up of the first limit chi part 19 and the first slippage part 18, and the second adjustable rule 20 is made up of Second Edge chi part 29 and the second slippage part 28, and the 3rd adjustable rule 30 is made up of the 3rd limit chi part 39 and the 3rd slippage part 38; Inclined plane groove 14 in the first described limit chi part 19 and between the inclined-plane protruding rail 41 in the 3rd slippage part 38 for being slidably matched, inclined plane groove 14 in described Second Edge chi part 29 and between the inclined-plane protruding rail 41 in the first slippage part 18 for being slidably matched, inclined plane groove 14 in the 3rd described limit chi part 39 and between the inclined-plane protruding rail 41 in the second slippage part 28 for being slidably matched, as improvement:
The lower surface of described slippage part is slide plate lower plane 61, and the upper surface of described limit chi part is plane 16 on the chi of limit; Slide plate lower plane 61 there is slippage through hole 108, limit chi plane 16 has limit chi stepped hole 109; Slide plate lower plane 61 there is inclined-plane protruding rail 41, plane 16 has inclined plane groove 14 with limit chi; Slide plate lower plane 61 there is corner window 31, plane 16 has corner scale 13 with limit chi; Limit chi there is scale slope 15 inside plane 16, scale slope 15 is also engraved length scale 51;
Described limit chi stepped hole 109 there is stepped hole plane 117, stepped screw 100 there are screw stub end 119 and screw cylindrical section 118, screw stub end 119 and screw cylindrical section 118 connecting portion are screw step surface 112, butterfly spring 110 there are butterfly spring outer shroud 115 and butterfly spring spoke 114, butterfly spring outer shroud 115 is fixed on the angle between limit chi stepped hole 109 and stepped hole plane 117, and butterfly spring spoke 114 holds in the palm screw step surface 112;
Described stepped screw 100 passes through successively and rotates through hole 108 and described limit chi stepped hole 109, wing nut 120 coordinates with described stepped screw 100 male end, to be overlapped on the chi of limit in plane 16 by rotatable for slide plate lower plane 61, described slide plate lower plane 61 is in sustained height with plane 16 on described limit chi, described stepped screw 100 and rotate between through hole 108 and limit chi stepped hole 109 and be matched in clearance;
Plane 16 has pearl seat stepped hole 58 with described limit chi, and pearl seat stepped hole 58 is arranged symmetrically in described inclined plane groove 14 both sides, in pearl seat stepped hole 58, step has stepped hole plane 57, and there is pearl seat blind hole 59 at stepped hole plane 57 center; In sliding pearl seat, half 81 is measure-alike with outer half 82 shape and structure of sliding pearl seat, all include sliding pearl seat cylindrical 86, sliding pearl seat faying face 84, sliding pearl seat lateral surface 85, sliding pearl seat faying face 84 there is circular hole 88 in sliding pearl seat, in sliding pearl seat, circular hole 88 bottom is connected to sliding pearl seat internal taper hole 83 stub end, and the little head end of sliding pearl seat internal taper hole 83 is crossing with described sliding pearl seat lateral surface 85;
Described pearl seat stepped hole 58 inner circle is fixed wtih the sliding pearl seat cylindrical 86 in sliding pearl seat cylindrical 86 in sliding pearl seat in half 81 and the outer half 82 of sliding pearl seat simultaneously, the sliding pearl seat internal taper hole 83 in sliding pearl seat in half 81 and be slidably matched between the sliding pearl seat internal taper hole 83 sliding outside pearl seat in half 82 and be fixed wtih slippage ball 80; In sliding pearl seat lateral surface 85 on slippage ball 80 in outstanding described sliding pearl seat in half 81, outstanding sphere 98 is accommodated among described pearl seat blind hole 59; The outer outstanding sphere 89 of the sliding pearl seat lateral surface 85 on slippage ball 80 in the outer half 82 of outstanding described sliding pearl seat contacts with described slide plate lower plane 61.
As further improvement: on described limit chi, plane 16 is 2.6 to 2.8 millimeters to the degree of depth of the groove-bottom plane 71 of described inclined plane groove 14 bottom surface, angle between the inclined-plane, both sides of described inclined plane groove 14 and groove-bottom plane 71 is 57 to 59 and spends, groove-bottom plane 71 width of described inclined plane groove 14 bottom surface is 5.7 to 5.9 millimeters, on described limit chi, the both sides of plane 16 and described inclined plane groove 14 concave fluted fillet 91 between face, and groove fillet 91 radius is 0.4. to 0.6 millimeter.
As further improvement: the height of the protruding rail top plane 74 above described slide plate lower plane 61 to described inclined-plane protruding rail 41 is 2.3 to 2.5 millimeters, angle between the both sides convex inclined plane of described inclined-plane protruding rail 41 and protruding rail top plane 74 is 57 to 59 and spends, and protruding rail top plane 74 width above described inclined-plane protruding rail 41 is 5.3 to 5.5 millimeters; Have protruding rail fillet 94 between described protruding rail top plane 74 and the both sides convex inclined plane of described inclined-plane protruding rail 41, protruding rail fillet 94 radius is 0.4. to 0.6 millimeter.
As further improvement: the angle on described scale slope 15 and limit chi between plane 16 is 44 to 46 to spend.
As further improvement: described length scale 51 texture depth is 0.21 to 0.23 millimeter.
As further improvement: there is stepped hole angle face 102 chi stepped hole 109 both sides, limit, the angle between the stepped hole angle face 102 of both sides is 58 to 60 degree.
In embodiment, on the chi of limit, the degree of depth of the groove-bottom plane 71 of plane 16 to inclined plane groove 14 bottom surface is 2.7 millimeters, angle between the inclined-plane, both sides of inclined plane groove 14 and groove-bottom plane 71 is 58 degree, groove-bottom plane 71 width of inclined plane groove 14 bottom surface is 5.8 millimeters, on the chi of limit, the both sides of plane 16 and inclined plane groove 14 concave fluted fillet 91 between face, groove fillet 91 radius is 0.5 millimeter, and inclined plane groove 14 one end is designed for opening.
The height of the protruding rail top plane 74 above slide plate lower plane 61 to inclined-plane protruding rail 41 is 2.4 millimeters, and the angle between the both sides convex inclined plane of inclined-plane protruding rail 41 and protruding rail top plane 74 is 58 degree, and protruding rail top plane 74 width above inclined-plane protruding rail 41 is 5.4 millimeters; Have protruding rail fillet 94 between protruding rail top plane 74 and the both sides convex inclined plane of inclined-plane protruding rail 41, protruding rail fillet 94 radius is 0.5 millimeter.
Angle on scale slope 15 and limit chi between plane 16 is 45 degree.
Length scale 51 texture depth is 0.22 millimeter, adopts laser typewriting to generate.
There is stepped hole angle face 102 chi stepped hole 109 both sides, limit, and the angle between the stepped hole angle face 102 of both sides is 59 degree.
In Figure 13, Figure 17, Figure 18, Figure 19 and Figure 20: mounting slip ball 80 in 40 pearl seat stepped holes 58 on the chi of limit in plane 16, adopt following steps:
One, half 81 in sliding pearl seat is placed in the low temperature chest of subzero 125 degree of Celsius temperature together with the outer half 82 of sliding pearl seat, continues 55 minutes, make half 81 and the outer half 82 of sliding pearl seat in sliding pearl seat cool rear size and reduce;
Two, first by slide plate lower plane 61 upward, successively half 81 in cunning pearl seat is arranged in pearl seat stepped hole 58 again, the sliding pearl seat lateral surface 85 in the sliding pearl seat in each pearl seat stepped hole 58 in half 81 is made to touch stepped hole plane 57, when in sliding pearl seat, half 81 returns to normal temperature state, the sliding pearl seat cylindrical 86 in sliding pearl seat in half 81 and have between pearl seat stepped hole 58 0.04 to 0.06 interference fit;
Three, successively slippage ball 80 to be placed in the sliding pearl seat in each sliding pearl seat in half 81 among circular hole 88;
Four, successively outer for cunning pearl seat half 82 is arranged in pearl seat stepped hole 58, make the sliding pearl seat faying face 84 in the outer half 82 of sliding pearl seat touch sliding pearl seat faying face 84 in sliding pearl seat in half 81, slippage ball 80 rides in the sliding pearl seat internal taper hole 83 in sliding pearl seat in half 81 and slides half 82 outside pearl seat and makes to slide spacing rolling between pearl seat internal taper hole 83; When the outer half 82 of sliding pearl seat returns to normal temperature state, sliding pearl seat cylindrical 86 in the outer half 82 of sliding pearl seat and have between pearl seat stepped hole 58 0.04 to 0.06 interference fit, on the sliding pearl seat lateral surface 85 in the outer half 82 of sliding pearl seat and described limit chi, plane 16 is fair.
When will carry out teaching differentiation to student, step is as follows:
One, in Fig. 9, equilateral triangle is developed into after the utility model will being combined, only the limit chi part in every adjustable rule need be done relative rotation with slippage part, by the corner window 31 on slide plate lower plane 61, the corner scale 13 observed on the chi of limit in plane 16 have rotated 30 degree, namely 60 are developed into by 90 degree of rotations between the inclined plane groove 14 of every adjustable rule self and inclined-plane protruding rail 41, angle between scale slope 15 in scale slope 15 then in the first limit chi part 19 and the scale slope 15 in Second Edge chi part 29 and the 3rd limit chi part 39 is all 60 degree, equilateral triangle is set up.
Two, Tu10Zhong, isosceles triangle is developed into after the utility model will being combined, only the limit chi part in wherein two adjustable rules need be done the identical anglec of rotation with slippage part, such as: the anglec of rotation the 3rd limit chi part 39 and the 3rd slippage part 38 being done counterclockwise 15 degree, Second Edge chi part 29 and the second slippage part 28 are also done counterclockwise the anglec of rotation of 15 degree, then the first limit chi part 19 and the first slippage part 18 necessarily do the anglec of rotation of 60 degree counterclockwise, and the equilateral triangle that interior angle is respectively 75 degree and 75 degree and 30 degree is set up.
Three, Tu11Zhong, right angled triangle is developed into after the utility model will being combined, only the limit chi part in a wherein adjustable rule and slipping part need be divided and keep centering position non rotating, such as: Second Edge chi part 29 and the second slippage part 28 are kept centering position non rotating, when the 3rd limit chi part 39 and the 3rd slippage part 38 do the anglec of rotation of 60 degree counterclockwise, then the first limit chi part 19 and the first slippage part 18 necessarily do the anglec of rotation of 30 degree counterclockwise, and the right angled triangle that interior angle is respectively 90 degree and 30 degree and 60 degree is set up.
Four, in Figure 12, isosceles right triangle is developed into after the utility model will being combined, only the limit chi part in a wherein adjustable rule and slipping part need be divided and keep centering position non rotating, limit chi part in other two adjustable rules and all equidirectional anglec of rotation doing 45 degree of slippage part, such as: Second Edge chi part 29 and the second slippage part 28 are kept centering position non rotating, 3rd limit chi part 39 and the 3rd slippage part 38 are done counterclockwise the anglec of rotation of 45 degree, Second Edge chi part 29 and the second slippage part 28 are also done counterclockwise the anglec of rotation of 45 degree, the isosceles right triangle that then interior angle is respectively 90 degree and 45 degree and 45 degree is set up.
The above-mentioned substantive distinguishing features of the utility model, has following progressive effect:
One, slippage part is positioned at chi part one end, limit and is overlapped on plane in the chi part of limit, and slide plate lower plane 61 is in sustained height with plane 16 on the chi of limit, guarantees that the length scale 51 on three limits is all in same level, avoids error on line of sight; And the inclined-plane protruding rail 41 on every adjustable rule and between the inclined plane groove 14 on adjacent activities chi for being slidably matched, particularly plane 16 there is limit chi corner scale 13 corresponding in position with the corner window 31 on slide plate lower plane 61, convenient, intuitively between control slippage part and limit chi part the anglec of rotation can be accomplished; Pearl seat stepped hole 58 internal fixtion particularly on the chi of limit in plane 16 slippage ball 80; The outer outstanding sphere 89 of slippage ball 80 contacts with described slide plate lower plane 61, makes plane 16 on the limit chi in each portable plate more easily smooth relative to slippage between the slide plate lower plane 61 in another portable plate; Butterfly spring outer shroud 115 is fixed on the angle between limit chi stepped hole 109 and stepped hole plane 117, and butterfly spring spoke 114 holds in the palm screw step surface 112; In conjunction with wing nut 120 regulating action, guarantee on the limit chi in each portable plate rotatable under the state with frictional resistance between plane 16 and the slide plate lower plane 61 of self.
Two, the utility model adopts the portable composite construction of three group, disassembles, the size that takes up room is little, is easy to carry after convenient each use.
Three, education activities chi provided by the utility model, has structure simple, easy to use, possesses the advantages such as size, angle are changeable.
In addition, teacher is when doing demonstration explanation to student, disposable continuous differentiation puts in place, more vividly understandable, makes student more have enjoyment in learning process.Multiple set square is not needed to demonstrate, do not need on blackboard, repeatedly draw not of uniform size, that angle is different triangle yet, to reduce measure error and to improve efficiency of teaching.
Claims (6)
1. an inclined-plane rail groove through hole corner activity teaching set square, comprise the first adjustable rule (10), the second adjustable rule (20) and the 3rd adjustable rule (30) that three physical dimensions are identical, every adjustable rule is made up of limit chi part and slippage part; First adjustable rule (10) is made up of the first limit chi part (19) and the first slippage part (18), second adjustable rule (20) is made up of Second Edge chi part (29) and the second slippage part (28), and the 3rd adjustable rule (30) is made up of the 3rd limit chi part (39) and the 3rd slippage part (38); Inclined plane groove (14) on the first described limit chi part (19) and between the inclined-plane protruding rail (41) in the 3rd slippage part (38) for being slidably matched, for being slidably matched between inclined-plane protruding rail (41) in inclined plane groove (14) in described Second Edge chi part (29) and the first slippage part (18), inclined plane groove (14) on the 3rd described limit chi part (39) and between the inclined-plane protruding rail (41) in the second slippage part (28) for being slidably matched, it is characterized in that:
The lower surface of described slippage part is slide plate lower plane (61), and the upper surface of described limit chi part is plane (16) on the chi of limit; Slide plate lower plane (61) there is slippage through hole (108), plane (16) has limit chi stepped hole (109) with limit chi; Slide plate lower plane (61) there is inclined-plane protruding rail (41), plane (16) has inclined plane groove (14) with limit chi; Slide plate lower plane (61) there is corner window (31), plane (16) has corner scale (13) with limit chi; On the chi of limit, there is scale slope (15) plane (16) inner side, scale slope (15) also engraves length scale (51);
Described limit chi stepped hole (109) there is stepped hole plane (117), stepped screw (100) there are screw stub end (119) and screw cylindrical section (118), screw stub end (119) and screw cylindrical section (118) connecting portion are screw step surface (112), butterfly spring (110) there are butterfly spring outer shroud (115) and butterfly spring spoke (114), butterfly spring outer shroud (115) is fixed on the angle between limit chi stepped hole (109) and stepped hole plane (117), butterfly spring spoke (114) holds in the palm screw step surface (112),
Described stepped screw (100) passes through successively and rotates through hole (108) and described limit chi stepped hole (109), wing nut (120) coordinates with described stepped screw (100) male end, to be overlapped on the chi of limit in plane (16) by rotatable for slide plate lower plane (61), on described slide plate lower plane (61) and described limit chi, plane (16) is in sustained height, and described stepped screw (100) is matched in clearance with between rotation through hole (108) and limit chi stepped hole (109);
Plane (16) there is pearl seat stepped hole (58) with described limit chi, pearl seat stepped hole (58) is arranged symmetrically in described inclined plane groove (14) both sides, pearl seat stepped hole (58) interior step has stepped hole plane (57), there is pearl seat blind hole (59) at stepped hole plane (57) center; In cunning pearl seat, half (82) shape and structure is measure-alike outward for half (81) and sliding pearl seat, all include sliding pearl seat cylindrical (86), sliding pearl seat faying face (84), sliding pearl seat lateral surface (85), sliding pearl seat faying face (84) there is circular hole (88) in sliding pearl seat, in sliding pearl seat, circular hole (88) bottom is connected to sliding pearl seat internal taper hole (83) stub end, and sliding pearl seat internal taper hole (83) little head end is crossing with described sliding pearl seat lateral surface (85);
Described pearl seat stepped hole (58) inner circle is fixed wtih the sliding pearl seat cylindrical (86) in sliding pearl seat cylindrical (86) in sliding pearl seat in half (81) and the outer half (82) of sliding pearl seat simultaneously, the sliding pearl seat internal taper hole (83) in sliding pearl seat in half (81) and be slidably matched between the sliding pearl seat internal taper hole (83) sliding outside pearl seat in half (82) and be fixed wtih slippage ball (80); The inner outstanding sphere (98) of sliding pearl seat lateral surface (85) in the upper outstanding described sliding pearl seat of slippage ball (80) in half (81) is accommodated among described pearl seat blind hole (59); The outer outstanding sphere (89) of the sliding pearl seat lateral surface (85) in the outer half (82) of the upper outstanding described sliding pearl seat of slippage ball (80) contacts with described slide plate lower plane (61).
2. a kind of inclined-plane according to claim 1 rail groove through hole corner activity teaching set square, it is characterized in that: on described limit chi, plane (16) is 2.6 to 2.8 millimeters to the degree of depth of the groove-bottom plane (71) of described inclined plane groove (14) bottom surface, angle between the inclined-plane, both sides of described inclined plane groove (14) and groove-bottom plane (71) is 57 to 59 and spends, groove-bottom plane (71) width of described inclined plane groove (14) bottom surface is 5.7 to 5.9 millimeters, on described limit chi, the both sides of plane (16) and described inclined plane groove (14) concave fluted fillet (91) between face, groove fillet (91) radius is 0.4. to 0.6 millimeter.
3. a kind of inclined-plane according to claim 1 rail groove through hole corner activity teaching set square, it is characterized in that: the height on protruding rail top plane (74) above described slide plate lower plane (61) to described inclined-plane protruding rail (41) is 2.3 to 2.5 millimeters, angle between the both sides convex inclined plane of described inclined-plane protruding rail (41) and protruding rail top plane (74) is 57 to 59 and spends, and protruding rail top plane (74) width above described inclined-plane protruding rail (41) is 5.3 to 5.5 millimeters; Have protruding rail fillet (94) between the both sides convex inclined plane of described protruding rail top plane (74) and described inclined-plane protruding rail (41), protruding rail fillet (94) radius is 0.4 to 0.6 millimeter.
4. a kind of inclined-plane according to claim 1 rail groove through hole corner activity teaching set square, is characterized in that: the angle on described scale slope (15) and limit chi between plane (16) is 44 to 46 to spend.
5. a kind of inclined-plane according to claim 1 rail groove through hole corner activity teaching set square, is characterized in that: described length scale (51) texture depth is 0.21 to 0.23 millimeter.
6. a kind of inclined-plane according to claim 1 rail groove through hole corner activity teaching set square, it is characterized in that: there is stepped hole angle face (102) chi stepped hole (109) both sides, limit, the angle between the stepped hole angle face (102) of both sides is 58 to 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916375.2U CN205185670U (en) | 2015-11-17 | 2015-11-17 | Inclined plane rail groove through -hole corner activity teaching set square |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520916375.2U CN205185670U (en) | 2015-11-17 | 2015-11-17 | Inclined plane rail groove through -hole corner activity teaching set square |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205185670U true CN205185670U (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520916375.2U Expired - Fee Related CN205185670U (en) | 2015-11-17 | 2015-11-17 | Inclined plane rail groove through -hole corner activity teaching set square |
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| Country | Link |
|---|---|
| CN (1) | CN205185670U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079980A (en) * | 2016-07-02 | 2016-11-09 | 深圳市中幼国际教育科技有限公司 | A kind of mathematics lift isosceles triangle drawing tools |
-
2015
- 2015-11-17 CN CN201520916375.2U patent/CN205185670U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079980A (en) * | 2016-07-02 | 2016-11-09 | 深圳市中幼国际教育科技有限公司 | A kind of mathematics lift isosceles triangle drawing tools |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20161117 |