CN201693891U

CN201693891U - Blackboard writing device

Info

Publication number: CN201693891U
Application number: CN2009201100707U
Authority: CN
Inventors: 李江
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-15
Filing date: 2009-07-15
Publication date: 2011-01-05
Anticipated expiration: 2019-07-15

Abstract

The utility model relates to a blackboard writing device which belongs to tools for culture and education and is used for solving the problems of inconveniences caused by that a blackboard writer can finish the work of drawing lines, circles, arcs and indicating contents by carrying a straight ruler, a compass and a pointer and the pollution of chalks to hands. The blackboard writing device is provided with a long handle with proper holding, one end of the handle can be connected with or separated from a pen fixing device, when in connection, the handle can be held for writing, and can clamp various pens for writing on different board surfaces; the handle is internally and longitudinally distributed with a plurality of guide wheels which are fixed in direction and parallel; and the edges of the guide wheel can be hidden or exposed at the handle, and when in exposing, the movement direction of the whole blackboard writing device is fixed as a line, thus realizing line drawing. The handle is internally provided with a telescopic device; one end of the telescopic device is fixed and the other end thereof can be drawn out; and the pen fixing device and a circle center positioning device are fixed at the two ends of the telescopic device, and the length of the telescopic device is adjusted to draw circles or arc lines with different radius. The telescopic device can be used for indicating as the pointer when being drawn out.

Description

The writing on the blackboard device

Affiliated technical field

The utility model relates to a kind of writing on the blackboard device, belongs to school supply and stationery, has multiple function.

Background technology

At present, when demonstration board faces such as blackboard carry out writing on the blackboard, mostly be writing on the blackboard person and directly grip chalk etc. and write or utilize simple tackling clamping chalk to write.The long-term chalk that directly grips is write the pollution of meeting generation dust to hand, also can cause the injury of friction, extruding to finger.Except that writing words, straight line, circle and the combination of the two belong to the most common pattern that writing on the blackboard need be drawn, and writing on the blackboard person need realize by aids such as chi, compasses usually, but also need indicate institute's book content by teacher's pointer.These aids are prepared not plenary session and are brought some difficulties to writing on the blackboard, and carry also enough inconvenient on deck.Writing on the blackboard needs different pens on the different demonstration board faces, is difficult for finding with the compasses that it generally cooperates, and comes difficulty for the picture round belt, also often occurs when cooperating the picture straight line with the liquid lettering pen with ruler being infected with the phenomenon of smearing that the chi edge causes because of ink.

Therefore at present still there is not a kind of writing on the blackboard instrument can solve above-mentioned demand or difficulty simultaneously.

Summary of the invention

Need carry inconvenience that multiple instrument brings in order to overcome writing on the blackboard person, directly grip chalk and write the difficulties of carrying out writing on the blackboard with different pens on adversary's pollution, damage and the different demonstration board, the utility model provides a kind of multi-functional writing on the blackboard device, can realize on different demonstration board faces, writing, drawing straight line, draw the function of circle and can be used as the teacher's pointer use, many convenience and minimizing adversary's pollution and injury are provided for the user with different pens.

The technical scheme that its technical problem that solves the utility model adopts is: comprise following structure: handle, be installed on handle inside directive wheel, be installed on the inner end of handle and fix, retractor device, the fixture that can extract out from the other end, be positioned at handle one end or retractor device and extract end out, center of circle positioner and the directive wheel in-out apparatus formed by disk and bossing.

Shell has the shape of microscler slyness, grips comfortablely, can drive a fixture clamping pen and directly write at the demonstration board face; Can the clamping polytype pen of pen clip can be regulated pen position and angle therein.Fixture can be connected with the extraction end of retractor device and the other end of shell, and when being connected with retractor device, syndeton allows a fixture to extract end out with one of two orthogonal directions and retractor device to be connected.When being retracted to suitable length, retractor device also locks, the disk of the center of circle positioner that press...withes one's finger, and the point of disk offside bossing contact is the center of circle, the center of circle is that radius can the picture circle to the distance of the tip of the brushstyle of a writing or painting.Handle is inner to be respectively equipped with directive wheel near two ends, the wheel shaft of directive wheel (or wheel face) direction is fixed and is parallel, the directive wheel outer rim is an anti-slip material, utilize the directive wheel in-out apparatus to drive the directive wheel outer rim and expose to handle, hand-held like this writing on the blackboard device moves, under nonslipping situation behind the directive wheel contact writing surface, can drive writing on the blackboard device integral body and prolong straight line and move, thereby the stroke that drives on the fixture goes out straight line.A fixture is taken off or is connected on the handle, retractor device is extracted out promptly be can be used as teacher's pointer written order content.Because gripping handle when writing and therefore contact pen has not overcome an adversary pollution and damage.

The beneficial effects of the utility model are, an instrument can be implemented on the different demonstration spaces of a whole page to be write, draw straight line, draw functions such as circle, indication with different pens, uses simply, small and exquisite portable and minimizing adversary's damage and pollution.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiments the utility model is further specified.

Fig. 1 is the vertical section structural map of first specific embodiments of the present utility model.

Fig. 2 is the horizontal profile structural map of first specific embodiments of the present utility model.

Fig. 3 is the vertical section structural map of second specific embodiments of the present utility model.

Fig. 4 is the vertical section structural map of the 3rd specific embodiments of the present utility model.

1 handle among the figure, 2 fixtures, 3, the joint pin of 4 retractor devices, 5 supports, 6 directive wheels, 7 anti-slip materials, 8 directive wheel in-out apparatus, 9 retractor devices, 10 handle joint pins, 11 springs, the disk of 12 center of circle positioners, the projection of 13 center of circle positioners.

The specific embodiment

Fig. 1 and Fig. 2 have described first embodiment of the present utility model.In Fig. 1, a fixture (2) can the dissimilar pen (3) of clamping, and pen (3) can the free adjustment position and angle (fixture has standing part and rotating part, mixes up available clamp nut locking after the angle).Fixture (2) can be fixed in by the joint pin (4) of retractor device on the retractor device (9), also can be fixed on the handle by handle joint pin (10).The pen that the configuration state of this writing on the blackboard device when Fig. 1 has represented to write, promptly hand-held handle (1) drive on the fixture (2) can writing words, and this moment, hand did not contact with pen (3), avoided pollution.Because handle (1) has slick and sly appearance, and the edge of directive wheel (6) is hidden in the handle (1), hand when therefore adjusting pen (3) to the angle that needs write pleasant.

When needs picture straight line, promote directive wheel in-out apparatus (8), promptly can promote support (5) moves down, the directive wheel (6) fixed above the support (5) can with support (5) move and with its edge exposure in handle, hand the handle move left and right this moment, because the direction of all directive wheels is parallel to each other and is fixing, and the outer rim of each directive wheel (6) comprises anti-slip material (7), be difficult for skidding with presentation surface, therefore the rotating direction of directive wheel (6) defines writing on the blackboard device integral body move left and right along a straight line, thereby a drive fixture (2) and even pen (3) move along straight line, the purpose that straight line is drawn in final realization.The effect of spring (11) has two: top spring action is when drawing straight line, joint pin (4), the fixture (2) of its pressure by retractor device (9), retractor device is delivered to pen (3) writing end, thereby guarantees that directive wheel contacts all that the tip of the brushstyle of a writing or painting has certain pressure to guarantee that drawn straight line is clear to the demonstration board face under the situation of presentation surface; The effect of following spring is to retract its elastic force promotion support (5) drive directive wheel (6) of directive wheel in-out apparatus (8) back when not needing the picture straight line to be hidden in the handle (1).

When needs picture bowlder, at first fixing behind retractor device (9) the axis half-twist (joint pin (4) provides jointly with a fixture (2) and has comprised orthogonal two closures with the fixture (2) of retractor device (9) end, such as positive square column connected mode), as Fig. 2, extract retractor device (9) out to length that needs and locking (having locking mechanism such as clamp nut or Spring Card between each section of retractor device (9)), this moment, radius length R was fixing.Propping up with the projection (13) of center of circle positioner need be as the position in the center of circle, the disk (12) of rotating center of circle positioner press...withes one's finger, because projection (13) the surface coverage anti-slip material of center of circle positioner is difficult for skidding, so the center of circle is fixing.Under the situation that this center of circle and radius R are all fixed, rotate this writing on the blackboard device, can be smoothly at demonstration board face draw required circle or circular arc.Retractor device (9) is not limited only to cylindrical, can also be cylindroid, polygon post or shapes such as laminated structure and flexural deformation thereof.

Directive wheel (6) is recovered in the handle (1), taking off a fixture (2) places on one side or is fixed on the handle joint pin (10) of the handle other end, all or part of then extraction retractor device (9) and locking, this writing on the blackboard this moment device just has smooth lever and elongated extension, and the end of extension is the joint pin (4) of retractor device, can have eye-catching color, the feature that the above needs as teacher's pointer written order content just, so this writing on the blackboard utensil has desirable deixis.

The operation principle of the directive wheel in-out apparatus (8) among Fig. 1 is: when its projection during over against the groove of support (5), support (5) rises under the effect of lower springs, and directive wheel (6) is hidden in handle; Promote directive wheel in-out apparatus (8) groove of projection and support (5) is staggered, then its projection extrusion rack (5) is downward, and support (5) drives the directive wheel edge exposure in handle, realizes picture straight line function.The design feature of present embodiment is that directive wheel (6) occurs in pairs and is distributed in retractor device (9) both sides as seen from Figure 2, and retractor device (9) is fixed on the support (5) by directive wheel (6) axle.It can also be seen that projection (13) the axle conllinear of disk of center of circle positioner (12) and center of circle positioner from Fig. 2.

Fig. 3 has described second embodiment of the present utility model.Distinguishing with the primary structure of first embodiment is that a fixture (2) is fixed in handle one end by handle joint pin (10) all the time, and the end of retractor device (9) is fixed with the disk (12) of center of circle positioner and the projection (13) of center of circle positioner.The center of circle is at the extraction end of retractor device (9) when using difference mainly to be the picture circle.Other structures and function are similar to first embodiment.

Fig. 4 has described the 3rd embodiment of the present utility model.Distinguishing with the primary structure of first embodiment is the below that directive wheel (6) and support (5) are positioned at retractor device (9), and directive wheel (6) diameter is littler, and can singlely be provided with.Directive wheel in-out apparatus (8) is positioned at the below, operation principle is: when the slit alignment guide that it comprises is taken turns (6), the pressure of support (5) upper springs causes support (5) and directive wheel (6) downwards, and directive wheel (6) part is passed the slit, makes its edge exposure in handle.Promote directive wheel in-out apparatus (8), slit and directive wheel (6) stagger, and upwards and the most at last its retaining is on top for directive wheel in-out apparatus (8) extruding directive wheel (6), and directive wheel is hidden in the handle.Other structures and function are similar to first embodiment.

Obviously, embodiment of the present utility model is not limited only to above-mentioned, through localized variation and combination, also other modes can occur.

Claims

1. writing on the blackboard device, comprise a handle and a fixture, it is characterized in that: handle inside comprises one one end and fixes, the retractor device that the other end can be extracted out from handle and two above wheel face directions are parallel to the directive wheel of handle major axis, and one by bossing and the center of circle positioner formed with its opposite circular.

2. writing on the blackboard device according to claim 1 is characterized in that: a fixture can be connected also separable with handle.

3. writing on the blackboard device according to claim 1 is characterized in that: a fixture can be regulated pen angle therein.

4. writing on the blackboard device according to claim 1 is characterized in that: a fixture can be connected or separate with the extraction end of retractor device.

5. writing on the blackboard device according to claim 1 is characterized in that: center of circle positioner can be positioned at the both sides of the close end of handle or be positioned at expansion link extracts end out.

6. writing on the blackboard device according to claim 1 is characterized in that: each directive wheel edge can hide or expose to handle.

7. writing on the blackboard device according to claim 1 is characterized in that: the projection and the disk of directive wheel outer rim, center of circle positioner are covered by anti-slip material.

8. writing on the blackboard device according to claim 6 is characterized in that: comprise and can drive the directive wheel in-out apparatus that directive wheel exposes or be hidden in handle.