CN203427500U

CN203427500U - Compass

Info

Publication number: CN203427500U
Application number: CN201320390563.7U
Authority: CN
Inventors: 刘明俊; 蔡若
Original assignee: Shenzhen Institute of Information Technology
Current assignee: Shenzhen Institute of Information Technology
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-02-12
Anticipated expiration: 2023-06-26

Abstract

A compass comprises a locating needle and a drawing pen. The drawing pen is used for drawing circles in a rotating mode with the locating needle being the center. The compass further comprises a case, a suction top connected to the bottom of the case, and a fixing frame connected to one side of the case. The locating needle is inserted into the suction top, the drawing pen is installed on the fixing frame, and the fixing frame can move in a telescoping mode relative to the case so that the position of the drawing pen can be changed. The compass is simple in structure, convenient to operate, and capable of being used for drawing the circles of various sizes on smooth or rough surfaces conveniently through the suction top and location of the locating needle, thereby being capable of being applied to various occasions.

Description

A kind of compasses

Technical field

The utility model relates to a kind of teaching and engineering apparatus, especially a kind of teaching and engineering compasses.

Background technology

In teaching and engineering application, conventionally need on blackboard/blank, be figure, yet because blackboard/blank is smooth especially, impetus is bad fixing, as when blackboard/blank upper drawing circle, the pilot pin of compasses cannot be located on smooth wall, thereby draws the round inconvenience especially that just seems, so, be necessary to develop a kind of novel compasses structure, convenient teaching and engineering application.

Utility model content

For addressing the above problem, the utility model provides a kind of compasses of being figure on can smooth easily wall.

A kind of compasses, comprise pilot pin and drawing pen, described drawing pen rotates draw circles centered by pilot pin, described compasses also comprise housing, are connected in the suction top of housing bottom and the fixed mount that is connected in housing one side, described pilot pin is inserted in inhales in top, described drawing pen is installed on fixed mount, and described fixed mount is the position of housing telescopic moving change drawing pen relatively.

Further, described housing comprises fixed station and turntable, and described turntable is positioned on fixed station and can rotates relative to fixed station, and described suction top is connected in the bottom of fixed station.

Further, described fixed station is provided with installing hole, described pilot pin comprises the prong being inserted in suction item, the options button that is sheathed on the spring on prong and is connected in prong top, the outer end of described options button is positioned at the installing hole of fixed station, presses described options button and described prong is stretched out or retract and inhale top.

Further, described fixed mount is provided with through hole described drawing pen is installed, and a side of described fixed mount is provided with the fixing hole being communicated with through hole, is removably connected with the fixing described drawing pen of fixator in described fixing hole.

Further, in described turntable, be provided with tape measure, described fixed mount is connected on the scale of tape measure, and tape measure rotates described fixed mount is moved relative to housing.

Further, described tape measure is connected in the turntable of housing by screw rod.

Further, also comprise switch, described switch and tape measure clip.

Further, described switch comprises with the card of tape measure clamping, be connected in projection on card, be sheathed on spring on projection, be covered on the connector on projection top and be covered on the button on connector, and described button is positioned at outside housing.

Compared to prior art, the utility model compasses are simple in structure, easy to operate, by inhaling and pilot pin location can draw the circle of various sizes easily on bright and clean or coarse face, can be applied to various occasion.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view of the utility model compasses.

Fig. 2 is the exploded view of Fig. 1.

Fig. 3 is the use view of the utility model compasses.

main element symbol description

Housing	10
		Fixed station	12
Installing hole	122
		Turntable	14
Perforate	142
		Opening	144
Inhale top	20
		Perforation	22
Pilot pin	30
		Prong	32

Spring	34
		Options button	36
Scale	40
		Scale	42
Switch	50
		Card	52
Projection	54
		Spring	56
Connector	58
		Button	59
Fixed mount	60
		Through hole	62
Fixing hole	64
		Fixator	66
Drawing pen	70
		Screw rod	80

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.The utility model compasses can be used easily on smooth or coarse wall, draw the circle of various sizes, are applicable to the multiple fields such as teaching, Graphing of Engineering.

As shown in Figures 1 and 2, the utility model compasses comprise housing 10, be connected in housing 10 bottoms suction top 20, be arranged in the pilot pin 30 of inhaling in top 20, be arranged at tape measure 40 in housing 10, be connected in switch 50 and the fixed mount 60 on tape measure 40 and be inserted in the drawing pen 70 in fixed mount 60.Described suction top 20, pilot pin 30, for locating described compasses, are wherein located by inhaling item 20 when wall is smooth, when wall is coarse, by pilot pin 30, locate, and desired circle is drawn out in the rotation centered by inhaling top 20, pilot pin 30 of described drawing pen 70.Described drawing pen 70 can be the pen of arbitrary form, as pencil, water-color paintbrush etc.

Described housing 10 integral body are cylindric, and lower end forms fixed station 12, and upper end forms turntable 14, and described turntable 14 can rotate relative to fixed station 12.The napex of turntable 14 forms perforate 142 for described switch 50 is installed, and a side of turntable forms opening 144 for described fixed mount 60 is set, and a side of fixed station 12 is formed with installing hole 122 for described pilot pin 30 is set.In the present embodiment, for convenience of assembling, housing 10 is divided into two along its axis, and during assembling, both splice engaging and form described housing 10.In other embodiments, described housing 10 also can be structure as a whole.

Described tape measure 40 is contained in the turntable 14 of housing 10, and forms pivot joint by screw rod 80 and turntable 14, thereby one is rotated relative to fixed station 12.In the present embodiment, described screw is laterally arranged in the central authorities of tape measure 40, thereby the scale 42 on tape measure 40 be take described screw rod 80 as axle center rotation.Preferably, described tape measure 40 is steel tape 40, on scale 42, is labeled with scale.

Described switch 50 forms clip with tape measure 40, for controlling the rotation of tape measure 40.In the present embodiment, described switch 50 comprises card 52, be connected in projection 54 on card 52, be sheathed on spring 56 on projection 54, be covered on the connector 58 on projection 54 tops and be covered on the button 59 on connector 58.Wherein, the top of described projection 54 is arranged in the perforate 142 of turntable 14, and described button 59 is positioned at housing 10 outsides, facilitates user to operate.When pressing described button 59, card 52 forms kayser with scale 42, thereby nonadjustable signal 42 can not rotate it, when again pressing the button 59, card 52 and scale 42 releases, scale 42 can freely rotate, when turning to precalculated position, again press the button 59 scale 42 is locked, thereby scale 42 is maintained to specific state.

Described fixed mount 60 is inserted in the opening 144 of turntable 14 and is connected with the scale 42 on tape measure 40, tape measure 40 drives described fixed mount 60 along opening 144 telescopic movings while rotating, thereby the distance on change tape measure 40 between drawing pen 70 and suction top 20, pilot pin 30, namely changes and will draw radius of a circle/size.

Particularly, when the size of the circle that will draw changes, press the button 59 and make tape measure 40 releases, according to drawing radius of a circle, by push/pull fixed mount 60, make scale 42 rotate protruding or inwardly retract, change the position of drawing pen 70, the distance that drawing pen 70 and pilot pin 30/ are inhaled between Ding20 center equals to draw radius of a circle, and then press the button 59 tape measure 40 is lockedly, and so drawing pen 70 positions are fixed, draw easily the circle of preliminary dimension.Because being provided with scale, scale 42 indicates, can read easily the length of stretching out or retracting when scale 42 rotates, thereby when regulating the position of drawing pen 70, can by read scale on scale 42 easily console switch 50 make drawing pen 70 be fixed on the position needing.

In the present embodiment, described fixed mount 60 central authorities are formed with through hole 62, are formed with fixing hole 64 on lateral surface, and described fixing hole 64 is connected with through hole 62 through fixed mount 60, fixator 66 is arranged in described fixing hole 64, drawing pen 70 is fixed in the through hole 62 of fixed mount 60.Described fixator 66 can be screw, described fixing hole 64 can be screw, thereby drawing pen 70 can be fixed in described fixed mount 60 by screwing in described fixator 66, and when drawing pen 70 needs to change or carry out cover degree conciliation, only need outwards to screw out described fixator 66 and unclamp drawing pen 70, simple and convenient.

Described suction pushes up 20 for adsorbing the smooth surfaces such as black and white, blank, wall, glass, thereby compasses are positioned on smooth surface.The central authorities of inhaling top 20 form vertical perforation 22, and described perforation 22 is connected with the installing hole 122 on fixed station 12.The options button 36 that described pilot pin 30 comprises prong 32, is sheathed on the spring 34 on prong 32 and is connected in prong 32 tops, described prong 32 is contained in the through hole 62 of inhaling top 20, the outer end of described options button 36 is positioned at the installing hole 122 on fixed station 12, by pressing described options button 36, can make prong 32 stretch out or be retracted to inhale in top 20.

When need to during as blackboard upper drawing circle, pressing options button 36 prong 32 is retracted in suction top 20 completely at smooth wall, so can push up 20 by suction the utility model compasses are fixed on smooth wall, facilitate the operation of picture circle.Particularly, suction top 20 is adsorbed in and will draws round home position, by fixture, adjust the height of drawing pen 70 on fixed mount 60, and adjust by switch 50 distance that fixed mount 60 stretches out, make drawing pen 70 be and will draw radius of a circle with the distance of inhaling Ding20 center, then rotate the circle that turntable 14 draws pre-sizing.Certainly, also can before being adsorbed in to wall, suction top 20 adjust height and the distance of drawing pen 70, and more convenient.When drawing the more coarse suction of round surface ratio top 20 can not adsorb time, pressing options button 36 stretches out outside suction item 20 pilot pin 30, so by pilot pin 30, compasses are positioned on the surface that will be figure, similarly adjust height and the distance of drawing pen 70, can draw needed circle.

As shown in the above, the utility model compasses are simple in structure, easy to operate, can on bright and clean or coarse face, draw easily the circle of various sizes, can be applied to various occasion.

Above content is in conjunction with a kind of explanation of specifically by routine embodiment, the utility model being done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; can also make some simple deduction or replace, all should be considered as belonging to the utility model by the definite scope of patent protection of submitted to claims.

Claims

1. compasses, comprise pilot pin and drawing pen, described drawing pen rotates draw circles centered by pilot pin, it is characterized in that: also comprise housing, be connected in the suction top of housing bottom and the fixed mount that is connected in housing one side, described pilot pin is inserted in inhales in top, described drawing pen is installed on fixed mount, and described fixed mount is the position of housing telescopic moving change drawing pen relatively.

2. compasses according to claim 1, is characterized in that: described housing comprises fixed station and turntable, and described turntable is positioned on fixed station and can rotates relative to fixed station, and described suction top is connected in the bottom of fixed station.

3. compasses according to claim 2, it is characterized in that: described fixed station is provided with installing hole, described pilot pin comprises the prong being inserted in suction top, the options button that is sheathed on the spring on prong and is connected in prong top, the outer end of described options button is positioned at the installing hole of fixed station, presses described options button and described prong is stretched out or retract and inhale top.

4. compasses according to claim 1, it is characterized in that: described fixed mount is provided with through hole described drawing pen is installed, one side of described fixed mount is provided with the fixing hole being communicated with through hole, is removably connected with the fixing described drawing pen of fixator in described fixing hole.

5. according to the compasses described in claim 1～4 any one, it is characterized in that: in described turntable, be provided with tape measure, described fixed mount is connected on the scale of tape measure, tape measure rotates described fixed mount is moved relative to housing.

6. compasses according to claim 5, is characterized in that: described tape measure is connected in the turntable of housing by screw rod.

7. compasses according to claim 5, is characterized in that: also comprise switch, described switch and tape measure clip.

8. compasses according to claim 7, it is characterized in that: described switch comprises with the card of tape measure clamping, be connected in projection on card, be sheathed on spring on projection, be covered on the connector on projection top and be covered on the button on connector, described button is positioned at outside housing.