CN2383698Y - Vernier compasses capable of fast opening and closing - Google Patents

Abstract

The utility model relates to a pair of trimming compasses capable of fast opening and closing, which is characterized in that a shaft gear 23 on an opening and closing compass foot 2 and fan-shaped teeth on a perpendicular foot 1 are mutually meshed, and a metal sheet reed 22 playing damping function is arranged in a frame 15. The utility model has the advantages that opening and closing are fast, time is saved by trimming, both a small circle and a large circle can be drawn, etc. The utility model is suited to be used by all students and engineering and technical personnel.

Description

The quickly opening and closing hair compass

The utility model relates to a kind of quickly opening and closing hair compass.

Existing compasses can be divided into bow compasses and big compasses two classes, and the defective of bow compasses is to draw roundlet, can not draw great circle, and the fine setting that separates or close up of rule pin relies on screw to regulate, and is quite time-consuming; Though big compasses rule pin can separate or close up fast, does not have micromatic setting, is not suitable for the picture roundlet again.

The purpose of this utility model is to provide a kind of quickly opening and closing hair compass, and the folding of these compasses is quick, and fine setting saves time, and both has been suitable for the picture roundlet, can draw great circle again, and the round size of drawing is accurate, is a kind of comparatively ideal drawing instrument.

A kind of quickly opening and closing hair compass, comprise vertical rule pin 1, retractable gauge foot 2, retractable gauge foot 2 is installed on the vertical rule pin 1 by metal hollow axle 3 and screw 4, it is characterized in that: vertically advise runner 14 that pin 1 is connected as a single entity by draw point 11, rule cap 12, needle guard 13, with needle guard 13 and framework 15, groove 16, installing hole 17, sector 18 constitutes; Its further groove 16 is positioned at framework 15, installing hole 17 is arranged in framework 15 tops, sector 18 is positioned at framework 15 bottoms, retractable gauge foot 2 is by support 21, sheet spring 22, shaft gear 23, regulating wheel 24, penholder 25, screw nut 26 constitutes, the top of its medium-height trestle 21, the middle part, the bottom is respectively equipped with installing hole, its underpart also has the fork pockets that is used for cloth pen rack 25, be arranged in the gear that the shaft gear 23 one ends in the support 21 middle part installing holes are provided with flange and are meshed with sector 18, the other end is eight prisms that match with regulating wheel 24, penholder 25 is fixed on the bottom of support 21 by screw nut 26, and support 21 and sheet spring 22 are installed in installing hole 17 places of vertical rule pin 1 by metal hollow axle 3 and screw 4.

With prior art relatively, these compasses have following advantage: (1) retractable gauge foot by confine with the framework of the sector of vertical rule pin global formation in, define two rule pin and be difficult for skew, be in all the time in the same plane, so draw small circle, big circumference is all more satisfactory; (2) because micromatic setting is a gear combination, so both fine-tuning, also available quick-moving speed is broken into two with one's hands or is closed up two and advise pin, service efficiency height; And also can work as accurate divider, so it has the advantage and the effect of accurate divider, small circle compasses and big compasses concurrently; (3) because the centering draw point on the revolution axial line of vertical rule pin, when compasses are made bowlder, this draw point does not rotate, so when drawing a plurality of concentric circles, the circle center hole on the drawing can not become big and damaged drawing yet; (4) the design has fully excavated the potentiality that the compasses moulding can replace metal machine-shaping with plastics, reaches low cost of manufacture, production efficiency height, advanced in performance purpose; (5) product weight is light, and electroplated component is few, and energy consumption is low, the service efficiency height.

Fig. 1 is the structural representation of quickly opening and closing hair compass.

Fig. 2 is the partial sectional view of Fig. 1.

Fig. 3 is the structural representation of vertical rule pin.

Fig. 4 is the structural representation of retractable gauge foot.

Fig. 5 is a metal leaf springs arrangement schematic diagram.

Fig. 6 is the shaft gear structure chart.

Fig. 7 is penholder, pen core installation diagram.

Embodiment:

A kind of quickly opening and closing hair compass, adopt as Fig. 1～structure shown in Figure 7, the draw point 11 of vertically advising pin adopts the draw point of diameter 2mm, its upper end draw down, bending, adding injection moulding becomes rule cap 12, and needle guard 13 and framework 15, groove 16, installing hole 17, sector 18 are all injection moulding machine-shaping.The support 21 of retractable gauge foot adopts injection mo(u)lding, place metal leaf springs 22 its bottoms in the groove 16 to push against frame wall inboard at sector 18, damping action is all arranged when making the rule pin separate or close up, guarantee can locate everywhere, penholder is equipped with two pen cores, is the antimonial lead pen core as one, another is the refined lead pen core, perhaps adopt the pencil-lead of two different colours, need only pivoted-jaw clip, just can reach the purpose of refill.

Claims (1)

1. quickly opening and closing hair compass, comprise vertical rule pin (1), retractable gauge foot (2), retractable gauge foot (2) is installed on the vertical rule pin (1) with screw (4) by metal hollow axle (3), it is characterized in that: vertically advise runner (14) that pin (1) is connected as a single entity by draw point (11), rule cap (12), needle guard (13), with needle guard (13) and framework (15), groove (16), installing hole (17), sector (18) constitutes; Its further groove (16) is positioned at framework (15), installing hole (17) is arranged in framework (15) top, sector (18) is positioned at framework (15) bottom, retractable gauge foot (2) is by support (21), sheet spring (22), shaft gear (23), regulating wheel (24), penholder (25), screw nut (26) constitutes, the top of its medium-height trestle (21), the middle part, the bottom is respectively equipped with installing hole, its middle and lower part also has the fork pockets that is used for cloth pen rack (25), be arranged in the gear that shaft gear (23) the one end in the installing hole of support (21) middle part is provided with flange and is meshed with sector (18), the other end is eight prisms that match with regulating wheel (24), penholder (25) is fixed on the bottom of support (21) by screw nut (26), and support (21) is located by the installing hole (17) that metal hollow axle (3) and screw (4) are installed in vertical rule pin (1) with sheet spring (22).

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