CN202911389U

CN202911389U - Compasses

Info

Publication number: CN202911389U
Application number: CN 201220531743
Authority: CN
Inventors: 徐国仁; 董基明
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-17
Filing date: 2012-10-17
Publication date: 2013-05-01
Anticipated expiration: 2022-10-17

Abstract

The utility model provides compasses. The compasses comprises a compass head, a pen foot and a pin, wherein the lower end of the pin is provided with an accommodation chamber; the lower end face of the pin is provided with a through hole which passes through the accommodation chamber; the wall surface of the accommodation chamber is provided with a long sliding chute and a positioning embedding groove; a pin seat is arranged in the accommodation chamber of the pin; the bottom of the pin seat is fixedly provided with a positioning pin which penetrates through the through hole of the pin; one side of the pin seat is provided with a push block; the push block is arranged in the long sliding chute of the pin; the positioning embedding block is arranged above the push block of the pin seat; one side of the positioning embedding block is extended to form an elastic sheet; and the spring is sleeved on the pin seat, so that the positioning pin can be retracted inward in the pin, and the condition that when the compasses are not used, a user is pricked by the positioning pin can be avoided.

Description

Compasses

Technical field

The utility model relates to a kind of compasses, refers in particular to a kind of pilot pin can being recessed in the stitch, can prevent the compasses pricking wound that is positioned when not using.

Background technology

Compasses are in mathematics and drawing, it is the instrument of draw circles or arc, see also shown in Figure 1, these compasses 1 mainly are provided with compasses head 10, stitch 11 and a pin 12 form, this stitch 11 is hubbed at this compasses head 10 belows with this pin 12, these compasses head 10 tops are provided with a holding rod 101, the lower end of this stitch 11 is installed with a pilot pin 110, rely on a bolt 120 and a nut 121 shaft of a writing brush 13 to be mounted on the lower end of this pin 12, the bottom of this shaft of a writing brush 13 convexes with pen core 130, so, stitch 11 and a pin 12 are outwards pulled open, making distance between the pen core 130 of pilot pin 110 and the shaft of a writing brush 13 is the circle drawn of institute's wish or the radius of arc, live the holding rod 101 of these compasses head 10 tops with finger grip, fulcrum centered by the pilot pin 110 of stitch 11 lower ends, make a pin 12 rotation that moves in a circle, 130 of the pen cores of this shaft of a writing brush 13 can draw circular arc or circular lines, so, the outside of stitch 11 is fixed and exposed to the pilot pin 110 of existing these stitch 11 lower ends, so when compasses do not use, can be because of the misgivings that have the pin 110 that is positioned to stab because of carelessness; Edge this, the utility model designer is to concentrate on studies, improve because the use of existing compasses has disappearance described above, is initiated out the utility model then.

Summary of the invention

Main purpose of the present utility model is providing a kind of compasses, can conveniently pilot pin be recessed in the stitch, and pilot pin is hidden, and can prevent from being stabbed by the pilot pin of compasses when not using.

Compasses of the present utility model, be provided with a compasses head, the top of this compasses head is provided with a holding rod, the upper end of pin and a stitch is hubbed in this compasses head, the upper end of this pin and this stitch is equipped with several gears, and the gear of this pin and the gear of this stitch are intermeshing, and the lower end of this pin is provided with holder, a tool is arranged in this holder, and relies on this holder that this tool is fixed;

It is characterized in that: the bottom of this stitch is provided with room, the lower surface of this stitch is provided with a break-through in the perforation of this room, the wall of this room is provided with a long chute and a location caulking groove, in the room of this stitch, be provided with a needle stand, the bottom of this needle stand is installed with a pilot pin, this pilot pin is extended through the perforation of this stitch, one side of this needle stand is provided with a pushing block, this pushing block is located in the long chute of this stitch, the pushing block top of this needle stand is provided with a location abaculus, the one side extension of this location abaculus is provided with a flexure strip, and a spring housing is located on this needle stand.

Compasses of the present utility model, wherein, the wall of this needle stand is provided with block edge, and an end of this spring is held in the block edge of this needle stand, and the other end of this spring is held in the bottom surface of the room of this stitch.

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: pilot pin can be recessed in the stitch, prevent from when not using, being stabbed by the pilot pin of compasses.

Description of drawings

Shown in Figure 1 is the stereogram of existing compasses;

Shown in Figure 2 is the section plan of the utility model embodiment;

Shown in Figure 3 is the schematic diagram of the pushing block of the utility model embodiment pressure holding needle stand;

Shown in Figure 4 is the schematic diagram that the utility model embodiment pilot pin inside contracts.

Description of reference numerals: 1 compasses; 10 compasses heads; 11 stitch; 110 pilot pins; 12 pin; 120 bolts; 121 nuts; 13 shafts of a writing brush; 130 pen cores; 2 compasses heads; 20 holding rods; 3 pin; 30 gears; 31 holders; 32 tools; 4 stitch; 40 gears; 41 rooms; 42 perforation; 43 long chutes; 44 positioning embeded grooves; 5 needle stands; 50 pilot pins; 51 pushing blocks; 52 location abaculus; 53 flexure strips; 54 block edges; 6 springs.

The specific embodiment

About the utility model is to reach above-mentioned application target and effect, the technological means that adopts is enumerated better feasible embodiment hereby, and cooperate graphic shown in, details are as follows:

Embodiment of the present utility model sees also shown in Figure 2ly, mainly is provided with a compasses head 2, and the top of this compasses head 2 is provided with a holding rod 20; A pin 3, its upper end is hubbed in this compasses head 2, and the upper end of this pin 3 is provided with several gears 30, and the lower end of this pin 3 is provided with 31, one tools 32 of a holder and is arranged in this holder 31, and relies on this holder 31 that this tool 32 is fixed; One stitch 4, its upper end is hubbed in this compasses head 2, the upper end of this stitch 4 is provided with several gears 40, the gear 40 of this stitch 4 is meshed with the gear 30 of this pin 3, the bottom of this stitch 4 is provided with a room 41, the lower surface of this stitch 4 is provided with a break-through in the perforation 42 of this room 41, and the wall of this room 41 is provided with a long chute 43 and a location caulking groove 44; One needle stand 5, be located in the room 41 of this stitch 4, the bottom of this needle stand 5 is installed with a pilot pin 50, one side of this needle stand 5 is provided with a pushing block 51, this pushing block 51 is located in the long chute 43 of this stitch 4, pushing block 51 tops of this needle stand 5 are provided with a location abaculus 52, and the side extension of this location abaculus 52 is provided with a flexure strip 53, and the wall of this needle stand 5 is provided with block edge 54; One spring 6 is sheathed on this needle stand 5, and an end of this spring 6 is held in the block edge 54 of this needle stand 5, and the other end of this spring 6 is held in the bottom surface of the room 41 of this stitch 4, so, is the structure of compasses.

Compasses of the present utility model in use, see also Fig. 2～shown in Figure 4, the pilot pin 50 outer lower ends (as shown in Figure 2) of stretching in stitch 4 of its needle stand 5, and the pushing block 51 of needle stand 5 is located in the long chute 43 of stitch 4 with location abaculus 52, location abaculus 52 is held in the top of the long chute 43 of stitch 4, needle stand 5 and downward pressure holding spring 6, make spring 6 be elastic compression, so, fulcrum centered by the pilot pin 50 that namely can be overhanging, make a pin 3 rotation that moves in a circle, 32 of tools of being located on the holder 31 of a pin 3 can draw circular arc or circular lines; When compasses do not use, only must be with the pushing block 51 inside pressure holdings of being located in the long chute 43 of stitch 4, the location abaculus 52 of pushing block 51 tops also moves inward and breaks away from the long chute 43 of stitch 4,53 set of flexure strips of location abaculus 52 1 sides are elastic compression, the spring 6 that is sheathed on block edge 54 belows of needle stand 5 then is elastic recovery, and with needle stand 5 pushing tow (as shown in Figure 3) upwards, when spring 6 elastic recoverys are pushed into location abaculus 52 on needle stand 5 and are aligned with the embedding hole 44, location of stitch 4,53 of flexure strips are elastic recovery and will locate abaculus 52 and outwards pass, location abaculus 52 is embedded in the embedding hole, location 44 of stitch 4 (as shown in Figure 4), needle stand 5 is located, the pilot pin 50 of needle stand 5 bottoms is then with moving on the needle stand 5 and be recessed in the room 41 of stitch 4, so, when not in use this pilot pin 50 can be hidden, can prevent that the compasses pin 50 that is positioned from stabbing when not using; When wanting to reuse compasses, only must inwardly press pushing block 51, make in the abaculus 52 of location and move the embedding hole, location 44 that breaks away from stitch 4, and make the flexure strip 53 of a side be elastic compression, again pushing block is pushed away for 51 times, needle stand 5 is moved down and Compress Spring 6 again, location abaculus 52 also moves down thereupon, decontrol pushing block 51 52 of rear location abaculus and be subjected to flexure strip 53 elastic recoverys, move and be embedded in the long chute 43 of stitch 4 outside the location abaculus 52 and make, 50 perforation 42 by stitch 4 of the pilot pin of needle stand 5 lower ends outwards protrude out (as shown in Figure 2), so, pilot pin 50 is protractile use, and is very convenient in the use.

More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, in the situation that does not break away from the spirit and scope that claim limits; can make many modifications, variation or equivalence, but all will fall within the protection domain of the present utility model.

Claims

1. compasses, be provided with a compasses head, the top of this compasses head is provided with a holding rod, the upper end of pin and a stitch is hubbed in this compasses head, the upper end of this pin and this stitch is equipped with several gears, and the gear of this pin and the gear of this stitch are intermeshing, and the lower end of this pin is provided with holder, a tool is arranged in this holder, and relies on this holder that this tool is fixed;

2. compasses according to claim 1, it is characterized in that: the wall of this needle stand is provided with block edge, and an end of this spring is held in the block edge of this needle stand, and the other end of this spring is held in the bottom surface of the room of this stitch.