CN201211794Y

CN201211794Y - Compass

Info

Publication number: CN201211794Y
Application number: CNU2008201202585U
Authority: CN
Inventors: 毛耀辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2009-03-25
Anticipated expiration: 2018-06-20

Abstract

The utility model relates to a compass which comprises a connector (4), a handle (3), a first compass foot (1) and a second compass foot (2), wherein the handle (3) is fixedly connected on the connector (4); the first compass foot (1) is hinged on the connector (4) and used for determining the center of a circle; and the second compass foot (2) is hinged on the connector (4) and goes around the first compass foot (1) so as to draw a circular arc. The compass is characterized in that the second compass foot (2) comprises a second connecting arm (24) and an expanding foot (7) which can enlarge a drawing semidiameter; the upper end part of the second connecting arm (24) is hinged with the connector (4), and the lower end part is in dismountable connection with the expanding foot (7); and the expanding foot (7) is in a Z shape in general and is provided with drawing pens (72). Compared with the prior art, the utility model has the advantages that the expanding foot is increased so as to enable the semidiameter of the drawing circular arc to be expanded and prolonged without being replaced by a large compass, so the use cost is also greatly reduced.

Description

A kind of compasses

Technical field

The utility model relates to a kind of compasses, relates in particular to a kind of compasses that enlarge the mapping radius.

Background technology

Common compasses generally include connector, be fixedly connected on the connector handle and with two compass foots of connector, one of them compass foot end is a needle point, another compass foot end is a drawing pen nib, during use, two compass foots need be separated into required radius, needle point is fixed in the center of circle, pinches handle rubbing rotation then and make drawing pen nib draw camber line along radius.Similarly structure can be with reference to Chinese utility model patent: ZL200520089696.6, ZL200420113673.X, ZL200620047145.8 etc.

But, this common compasses are in use owing to be subjected to the restriction of two compass foot length at present, the maximum circular arc radius ratio that can draw can not be very big, and in case surpass certain arc radius, compasses operate also cumbersome, so just need the long large-scale compasses of compass foot, must increase use cost.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of expansion pin that is provided with to realize the bigger compasses of arc radius of mapping at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of compasses comprise

Connector;

Handle is fixedly connected on the aforementioned connector;

Be hinged on first compass foot of aforementioned connector, be used for determining the center of circle; And

Be hinged on second compass foot of aforementioned connector, around aforementioned first compass foot to realize the picture circular arc;

It is characterized in that described second compass foot comprises second linking arm and the expansion pin that can enlarge the mapping radius, this second linking arm upper end and described connector are hinged, the bottom is connected with aforementioned expansion released feet formula, and this expansion pin is Z-shaped substantially and have the picture circular arc and get a tool.

Particularly, the expansion pin is preferably as follows design: described expansion pin comprises that transverse arm and detached type be located at the tool on the transverse arm length direction.

Be convenient to regulate arc radius, described transverse arm upper surface has bar-shaped trough, accordingly, have the adjusting through hole that passes through for described transverse arm on described the tool, and the sidewall of this adjusting through hole offers screw, be bolted with a manual bolt in this screw, and this manual bolt is over against described bar-shaped trough.

The expansion pin is preferably as follows design with the fit system that is connected of second compass foot: described expansion pin upper end has the portion of stretching into, this stretches into portion and has breach from the top vertically, and the both sides outer wall of breach axially convexes with positioning strip, accordingly, the described second linking arm bottom has the storage tank that inserts for the aforementioned portion of stretching into, these storage tank both sides have the locating notch that inserts for aforementioned positioning strip, and, this storage tank bottom radially is equipped with one can be as for the aforementioned bolt that stretches into portion's breach, and the described second linking arm bottom outer wall also is provided with the clamp nut that is bolted in aforementioned bolt.

Be convenient to the rapid adjustment opening angle between the compass foot, the middle part of the middle part of described first compass foot and second compass foot is respectively equipped with first locating button and second locating button of eye all with holes, pass the eyelet of first locating button, the eyelet of second locating button, the through hole at the through hole at first compass foot middle part and second compass foot middle part is provided with an adjusting screw(rod), and, this first locating button passes the two side of first compass foot middle part through hole and exposes the limiting section of first locating button, the other end that this first locating button is relative with limiting section is connected on first button, this first button lever formula is located at first compass foot middle part, and this second locating button passes the two side of second compass foot middle part through hole and expose the limiting section of second locating button, the other end that this second locating button is relative with limiting section is connected on second button, and this second button lever formula is located at second compass foot middle part.

First button can design by following lever: have one first back-moving spring between the middle part outer wall of the first end of described first button and first compass foot, the middle part is pinned at the first compass foot outer wall, and the second end then is connected with first locating button.Similarly, have one second back-moving spring between the middle part outer wall of the first end of described second button and second compass foot, the middle part is pinned at the second compass foot outer wall, and the second end then is connected with second locating button.

Be convenient to further fine setting, described adjusting screw(rod) also is bolted with a fine-tuning nut between first locating button and second locating button.

Compared with prior art, advantage of the present utility model is: set up the expansion pin, made the mapping arc radius expand prolongation greatly, but need not to be replaced by large-scale compasses, use cost also reduces greatly; In the expansion pin between a tool and the transverse arm adjustability design be very easy to use again.And overall structure is simple, and is easy to assembly quick.

Description of drawings

Fig. 1 is the example structure schematic diagram.

Fig. 2 is the embodiment left view.

Fig. 3 is common compasses structural representation.

Fig. 4 is the three-dimensional structure for amplifying schematic diagram of expansion pin.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment: with reference to figure 1, Fig. 2 and shown in Figure 4, compasses in the present embodiment comprise connector 4, handle 3, first compass foot 1 and second compass foot 2, handle 3 is fixedly connected on the connector 4, the rotation application of force when being used to map, and first compass foot 1 is used for determining the center of circle, the upper end is articulated in connector 4, the bottom has the pin of deciding 11, the second compass foots 2 can also be articulated in connector 4 around first compass foot 1 to realize the picture circular arc.

Second compass foot 2 comprises second linking arm 24 again and can enlarge the expansion pin 7 of mapping radius, these second linking arm, 24 upper ends and connector 4 are hinged, the bottom is connected with the upper end detached type of expansion pin 7, and this expansion pin 7 is Z-shaped substantially, and the bottom has a tool 72 of drawing.

Expansion pin 7 comprises that transverse arm 71 and detached type be located at the tool 72 on transverse arm 71 length directions.Transverse arm 71 is as follows with the connected mode of a tool 72: transverse arm 71 upper surfaces have bar-shaped trough 711, accordingly, has the adjusting through hole that passes through for transverse arm 711 on the tool 72, and, the sidewall of this adjusting through hole offers screw, be bolted with a manual bolt 722 in this screw, and this manual bolt 722 is over against bar-shaped trough 71), manually the adjusting of bolt 722 realizes that by the manual nut 721 of manual bolt 722 heads manually bolt 722 and manual nut can be integral pieces.

The connected mode of the expansion pin 7 and second linking arm 24 is as follows: expansion pin 7 upper ends have the portion of stretching into 73, this stretches into portion 73 and has breach 732 from the top vertically, and the both sides outer wall of this breach 732 axially convexes with positioning strip 731, accordingly, second linking arm, 24 bottoms have for stretching into the storage tank that portion 73 inserts, these storage tank both sides have the locating notch 21 that inserts for aforementioned positioning strip 731, and, this storage tank bottom radially is equipped with bolt 22, the second linking arms 24 bottom outer walls that stretch into portion's breach and also is provided with the clamp nut 23 that is bolted in bolt 22.

The middle part of the middle part of first compass foot 1 and second compass foot 2 is respectively equipped with first locating button 81 and second locating button 82 of eye all with holes, pass the eyelet of first locating button 81, the eyelet of second locating button 82, the through hole 92 at the through hole 91 at first compass foot, 1 middle part and second compass foot, 2 middle parts is provided with an adjusting screw(rod) 5, and, this first locating button 81 passes the two side of first compass foot, 1 middle part through hole 91 and exposes the limiting section 811 of first locating button 81, this first locating button 81 and the limiting section 811 relative other ends are connected on first button 61, first button, 61 levers are located at first compass foot, 1 middle part, and this second locating button 82 passes the two side of second compass foot, 2 middle part through holes 92 and expose the limiting section (among the figure do not have show) of second locating button 82, the other end that this second locating button 82 is relative with limiting section is connected on second button 62, and second button, 62 levers are located at second compass foot, 2 middle parts.

Have one first back-moving spring 64 between the middle part outer wall of the first end of first button 61 and first compass foot 1, the middle part is pinned at first compass foot, 1 outer wall, and the second end then is connected with first locating button 61.Equally, have one second back-moving spring between the middle part outer wall of the first end of second button 62 and second compass foot 2, the middle part is pinned at second compass foot, 2 outer walls, and the second end then is connected with second locating button 62.Adjusting screw(rod) 5 also is bolted with a fine-tuning nut 63 between first locating button 61 and second locating button 62.

Two hands are pushed first button 61 and second button 62 respectively simultaneously, but the opening angle between free adjustment first compass foot 1 and second compass foot 2 then, and to determine required radius fast, two fine-tuning nuts 63 can be regulated among a small circle.

Fig. 3 unloads the structural representation that expansion pin 7 is loaded onto common drawing pin 100.Compasses in use can be according to actual needs in Fig. 1 and two kinds of patterns of Fig. 3 freedom change easily.

Claims

1, a kind of compasses comprise

Connector (4);

Handle (3) is fixedly connected on the aforementioned connector (4);

Be hinged on first compass foot (1) of aforementioned connector (4), be used for determining the center of circle; And

Be hinged on second compass foot (2) of aforementioned connector (4), around aforementioned first compass foot (1) to realize the picture circular arc;

It is characterized in that described second compass foot (2) comprise second linking arm (24) and can enlarge the mapping radius expansion pin (7), this second linking arm (24) upper end and described connector (4) are hinged, the bottom is connected with the detached type of aforementioned expansion pin (7), and this expansion pin (7) is Z-shaped substantially and have a tool (72) of drawing.

2, compasses according to claim 1 is characterized in that described expansion pin (7) comprises that transverse arm (71) and detached type be located at the tool (72) on the transverse arm length direction.

3, compasses according to claim 2, it is characterized in that described transverse arm (71) upper surface has bar-shaped trough (711), accordingly, has the adjusting through hole that passes through for described transverse arm (711) on described the tool (72), and, the sidewall of this adjusting through hole offers screw, be bolted with a manual bolt (722) in this screw, and this manual bolt (722) is over against described bar-shaped trough (711).

4, compasses according to claim 1, it is characterized in that described expansion pin (7) upper end has the portion of stretching into (73), this stretches into portion (73) and has breach (732) from the top vertically, and the both sides outer wall of this breach (732) axially convexes with positioning strip (731), accordingly, described second linking arm (24) bottom has the storage tank that stretches into portion (73) insertion for aforementioned, these storage tank both sides have the locating notch (21) that inserts for aforementioned positioning strip (731), and, this storage tank bottom radially is equipped with one can be as for the aforementioned bolt (22) that stretches into portion's breach, and described second linking arm (24) bottom outer wall also is provided with the clamp nut (23) that is bolted in aforementioned bolt (22).

5, according to the arbitrary described compasses of claim 1 to 4, it is characterized in that the middle part of the middle part of described first compass foot (1) and second compass foot (2) is respectively equipped with first locating button (81) and second locating button (82) of eye all with holes, pass the eyelet of first locating button (81), the eyelet of second locating button (82), the through hole (92) at the through hole (91) at first compass foot (1) middle part and second compass foot (2) middle part is provided with an adjusting screw(rod) (5), and, this first locating button (81) passes the two side of first compass foot (1) middle part through hole (91) and exposes the limiting section (811) of first locating button (81), the other end that this first locating button (81) is relative with limiting section (811) is connected on first button (61), this first button (61) lever is located at first compass foot (1) middle part, and this second locating button (82) passes the two side of second compass foot (2) middle part through hole (92) and exposes the limiting section of second locating button (82), this second locating button (82) other end relative with limiting section is connected on second button (62), and this second button (62) lever is located at second compass foot (2) middle part.

6, compasses according to claim 5, it is characterized in that having one first back-moving spring (64) between the middle part outer wall of the first end of described first button (61) and first compass foot (1), the middle part is pinned at first compass foot (1) outer wall, and the second end then is connected with first locating button (61).

7, compasses according to claim 5, it is characterized in that having one second back-moving spring between the middle part outer wall of the first end of described second button (62) and second compass foot (2), the middle part is pinned at second compass foot (2) outer wall, and the second end then is connected with second locating button (62).

8, compasses according to claim 5 is characterized in that described adjusting screw(rod) (5) is positioned between first locating button (61) and second locating button (62) also to be bolted with a fine-tuning nut (63).