CN204701338U - A kind of Portable blackboard special compasses - Google Patents

A kind of Portable blackboard special compasses Download PDF

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Publication number
CN204701338U
CN204701338U CN201520439714.2U CN201520439714U CN204701338U CN 204701338 U CN204701338 U CN 204701338U CN 201520439714 U CN201520439714 U CN 201520439714U CN 204701338 U CN204701338 U CN 204701338U
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CN
China
Prior art keywords
locating shaft
scale
chalk
long slot
slot bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520439714.2U
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Chinese (zh)
Inventor
徐书晗
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Priority to CN201520439714.2U priority Critical patent/CN204701338U/en
Application granted granted Critical
Publication of CN204701338U publication Critical patent/CN204701338U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of Portable blackboard special compasses, comprise scale and locating shaft, the middle part of scale is provided with long slot bore, the end of scale is provided with a chalk fixing hole, a chalk is clamped with in chalk fixing hole, locating shaft to be interspersed in long slot bore and can to move left and right along long slot bore direction, the both sides up and down that locating shaft is positioned at scale are respectively provided with a locking nut, the bottom of locating shaft is provided with a connector, the bottom of connector is fixed with a magnet, cross and be arranged at magnet adsorption bottom locating shaft on blackboard, utilize the distance regulated and controled between locating shaft and chalk of the scale on scale can draw the circle of certain radius accurately, when not using, locating shaft and scale can be split and come, be easy to carry, it is simple to operate, save between picture bowlder.

Description

A kind of Portable blackboard special compasses
Technical field
The utility model relates to a kind of science and education instrument, is specifically related to a kind of Portable blackboard special compasses plate.
Background technology
There is following shortcoming in the compasses of current teachers ' teaching: one: compasses do not have scale, cannot mark circle accurately, and painting bowlder needs to adopt ruler to measure size accurately in addition; Two: due to not in one plane, so not very convenient when drawing; Three: the nail bottom the leg due to traditional compasses being point, painting bowlder, easily skidding, draw circle inaccurate, efficiency is low.
Utility model content
(1) technical problem that will solve
In order to overcome prior art deficiency, now propose a kind of Portable blackboard special compasses, its structure is simple, is easy to carry, and paint circle rapidly, operating efficiency is high.
(2) technical scheme
Of the present utility modelly to be achieved through the following technical solutions: the utility model proposes a kind of Portable blackboard special compasses, comprise scale and locating shaft, the middle part of described scale is provided with long slot bore, the end of described scale is provided with a chalk fixing hole, a chalk is clamped with in described chalk fixing hole, described locating shaft to be interspersed in described long slot bore and can to move left and right along long slot bore direction, the both sides up and down that described locating shaft is positioned at scale are respectively provided with a locking nut, the bottom of described locating shaft is provided with a connector, the bottom of described connector is fixed with a magnet.
Improve as one, in described chalk fixing hole, be provided with a rubber ring.
As further improvement, described locating shaft is provided with the external screw teeth mated with locking nut.
As further improvement, described locating shaft and connector junction are provided with ball bearing.
As further improvement, the side of described long slot bore is provided with scale.
(3) beneficial effect
The utility model, relative to prior art, has following beneficial effect:
A kind of Portable blackboard special compasses that the utility model proposes, it is by being arranged at magnet adsorption bottom locating shaft on blackboard, utilize the distance regulated and controled between locating shaft and chalk of the scale on scale can draw the circle of certain radius accurately, when not using, locating shaft and scale can be split and come, be easy to carry, it is simple to operate, saves between picture bowlder.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is scale structural representation.
1-scale; 2-locating shaft; 3-locking nut; 4-connector; 5-magnet; 6-chalk; 7-ball bearing; 11-long slot bore; 12-chalk fixing hole; 13-rubber ring.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
A kind of Portable blackboard special compasses as depicted in figs. 1 and 2, comprise scale 1 and locating shaft 2, the middle part of described scale 1 is provided with long slot bore 11, the end of described scale 1 is provided with a chalk fixing hole 12, a chalk 6 is clamped with in described chalk fixing hole 12, described locating shaft 2 to be interspersed in described long slot bore 11 and can to move left and right along long slot bore 11 direction, the both sides up and down that described locating shaft 2 is positioned at scale 1 are respectively provided with a locking nut 3, the bottom of described locating shaft 2 is provided with a connector 4, and the bottom of described connector 4 is fixed with a magnet 5.
Wherein, a rubber ring 13 is provided with in described chalk fixing hole 12; Described locating shaft 2 is provided with the external screw teeth mated with locking nut 3; Described locating shaft 2 is provided with ball bearing 7 with connector 4 junction; The side of described long slot bore 11 is provided with scale.
A kind of Portable blackboard special compasses that above specific embodiment is mentioned, it is when specifically using, first chalk 6 is inserted in rubber ring 13, the effect of rubber ring 13 can ensure that clamping chalk 6 is more firm, then the distance between locating shaft 2 and chalk 6 is adjusted according to the size of the circle of required picture, this distance is drawn radius of a circle, when adjusting to correct position, adjust two locking nuts 3 be positioned on locating shaft 2, stationary positioned axle 2 on the one hand, adjustment locating shaft 2 bottom magnet 5 and chalk 6 lower horizontal on the other hand, better to draw circle, draw bowlder, the magnet 5 being positioned at locating shaft 2 bottom is adsorbed on blackboard surface, hold chalk 6 turn-take can complete picture circle process, ball bearing 7 is provided with between locating shaft 2 and connector 4, it can rotate freely by auxiliary positioning axle 2, when not in use, all parts can split and deposit respectively, easy to carry, simple to operate.
Embodiment recited above is only be described preferred embodiment of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.

Claims (5)

1. a Portable blackboard special compasses, comprise scale (1) and locating shaft (2), it is characterized in that: the middle part of described scale (1) is provided with long slot bore (11), the end of described scale (1) is provided with a chalk fixing hole (12), a chalk (6) is clamped with in described chalk fixing hole (12), described locating shaft (2) to be interspersed in described long slot bore (11) and can to move left and right along long slot bore (11) direction, the both sides up and down that described locating shaft (2) is positioned at scale (1) are respectively provided with a locking nut (3), the bottom of described locating shaft (2) is provided with a connector (4), the bottom of described connector (4) is fixed with a magnet (5).
2. a kind of Portable blackboard special compasses according to claim 1, is characterized in that: be provided with a rubber ring (13) in described chalk fixing hole (12).
3. a kind of Portable blackboard special compasses according to claim 1, is characterized in that: described locating shaft (2) is provided with the external screw teeth mated with locking nut (3).
4. a kind of Portable blackboard special compasses according to claim 1, is characterized in that: described locating shaft (2) and connector (4) junction are provided with ball bearing (7).
5. a kind of Portable blackboard special compasses according to claim 1, is characterized in that: the side of described long slot bore (11) is provided with scale.
CN201520439714.2U 2015-06-24 2015-06-24 A kind of Portable blackboard special compasses Expired - Fee Related CN204701338U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520439714.2U CN204701338U (en) 2015-06-24 2015-06-24 A kind of Portable blackboard special compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520439714.2U CN204701338U (en) 2015-06-24 2015-06-24 A kind of Portable blackboard special compasses

Publications (1)

Publication Number Publication Date
CN204701338U true CN204701338U (en) 2015-10-14

Family

ID=54280977

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520439714.2U Expired - Fee Related CN204701338U (en) 2015-06-24 2015-06-24 A kind of Portable blackboard special compasses

Country Status (1)

Country Link
CN (1) CN204701338U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105774332A (en) * 2016-05-13 2016-07-20 安庆师范学院 Novel multifunctional teaching compasses
CN108340712A (en) * 2018-02-07 2018-07-31 嘉善信息技术工程学校 A kind of multifunction magnetic ruler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105774332A (en) * 2016-05-13 2016-07-20 安庆师范学院 Novel multifunctional teaching compasses
CN108340712A (en) * 2018-02-07 2018-07-31 嘉善信息技术工程学校 A kind of multifunction magnetic ruler

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151014

Termination date: 20160624

CF01 Termination of patent right due to non-payment of annual fee