CN201320902Y

CN201320902Y - Straightedge

Info

Publication number: CN201320902Y
Application number: CNU200820303633XU
Authority: CN
Inventors: 徐叶飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2009-10-07
Anticipated expiration: 2018-12-24

Abstract

The utility model pertains to the field of office supplies and specifically relates to a straightedge. The technical problem being solved provides a safe circle-drawing tool. The circle-drawing tool is a straightedge which is characterized in that the straightedge comprises a fixing hole and at least one small hole. The fixing hole is used for drawing a center of a circle. When drawing, a fixing object (such as a pen or other rod-shaped objects) is inserted on the fixing hole; then a drawing pen is inserted on the small hole to stabilize the fixing object inserted on the fixing hole; and the drawing pen on the small hole is moved along to whirl and draw the circle. Because the semi-diameter of the small hole is fixed, a circle can be drawn. The circle-drawing tool has no dangerous objects such as a needlepoint and only needs the tools like a pen to help fix and draw the circle when drawing, thereby greatly improving the safety of using and carrying.

Description

Ruler

Technical field

The utility model belongs to the office appliance field, is specifically related to ruler.

Background technology

Serve as reasons rotating shaft four parts of bull stick, handle and handle below of the bull stick that has needle point, band paintbrush of existing compasses are formed.There is following shortcoming in these compasses:

1, poor stability: because a bull stick band needle point is arranged, once had report that people so needle point are arranged and injured.

2, use inconvenient: if want divider calipers to decide the bowlder of size, the distance of earlier to adjust two bull sticks according to ruler at tip (needle tip and pen tip) is to determine radius of a circle, and picture is round accurate inadequately like this, inconvenience.

3, be not easy to carry: this compasses volume is big, and needle point is arranged, and needs adorning with the box of special use, and volume increases; And if airtight not tight, compasses drop out box, and are very easily injured under unwitting situation, stay potential safety hazard.

4, be not durable: these compasses all serve as the rotating shaft of handle below with nut, but this nut is prone to loosening even disengaging, is not durable, and are difficult for after loosening restoring, and influence the picture quality.

5, not attractive in appearance: as owing to draw bowlder, to need on paper, to stay pinprick, influence cleaning.

Thereby, be badly in need of developing overcoming the problems referred to above, safe and convenient durable circle tool.

The utility model content

The technical problem that the utility model solved provides a kind of safe circle tool.

Solving the utility model technical problem is achieved through the following technical solutions: this circle tool is a ruler, it is characterized in that this ruler comprises a fixing hole and at least one aperture.Fixing hole on the ruler is used for the picture center of circle, be inserted on the fixing hole with similar rod-like articles such as fixed object such as pens during picture, again with the picture penholder on aperture, the stable fixture that is inserted on the fixing hole, the picture pen rotation of taking advantage of a situation on the mobile aperture is drawn, because the constant radius in hole, thereby the circle of can drawing.Do not have dangerous goods such as needle point in this circle tool, only need when drawing, to adopt pen wait instrument auxiliary fixing, draw roundly, use and the security when carrying improves greatly.

The beneficial effects of the utility model are: do not have dangerous goods such as needle point in the circle tool, use and the security when carrying improves greatly.The picture bowlder also can be provided with is convenient to stable bayonet unit, in order to guarantee the accuracy of picture radius of circle, the fixing hole center of circle to the aperture center of circle or the distance in the funnel hole center of circle be that the scale value (generally being made as zero point) of fixing hole center of circle correspondence is to the aperture center of circle or the difference of the scale value of funnel hole center of circle correspondence.

Description of drawings

Fig. 1 is the utility model ruler.

Fig. 2 is the utility model ruler.

Fig. 3 is the split figure of the used buckle up and down of the utility model ruler.

Fig. 4 is the zoarium figure of the used buckle up and down of the utility model ruler.

Fig. 5 adopts the stable ruler of buckle up and down for the utility model.

1 expression blade wherein, 2 expression fixing holes, 3 expression apertures, 4 expression graduation marks, buckle is gone up in 5 expressions, and 6 expressions are buckle down, 7 expression stuck points, 8 expressions are the rubber layer of buckle lower surface down, the outer shaft surface of 9 expression bayonet units, the inner surface that 10 expression bayonet units form.

The specific embodiment

Below by to the description of the utility model specific embodiment explanation but do not limit the utility model.

The utility model technology adopts ruler as drawing tools.

As depicted in figs. 1 and 2, the blade 1 of ruler comprises a fixing hole 2 and at least one aperture 3.Fixing hole 2 on the ruler is used for the picture center of circle, and aperture 3 is used for the picture circumference.The position of fixing hole 2 both can be at an end of ruler, also can be at the middle part of ruler.To be convenient to draw and the fixing center of circle in order making, the inner surface of fixing hole 2, aperture 3 to be arranged to infundibulate, so that penholder is gone into.

As improvement of the technical scheme, in order to increase the stability of fixing hole, avoid moving and cause picture circle failure because of the center of circle of having light fingers, so 2 places are provided with a bayonet unit at fixing hole, this bayonet unit comprises buckle 5 and following buckle 6, at

last buckle

5 and 6 surfaces of following buckle stuck point 7 is set respectively, make buckle 5, descend buckle 6 adaptive, but both interlocks is firm.Adaptive after upper and lower buckle (5, the 6) interlock with the fixing hole 2 of ruler, make ruler to rotate around the outer shaft surface 9 of bayonet unit.In order to increase the stability in when rotation, at the lower surface of buckle 6 down, promptly the side that contact with paper is provided with one deck rubber 8, or the material with identical, similar quality makes the picture bowlder center of circle fixing mobile to increase frictional force.Be convenient to draw and the fixing center of circle in order to make, the inner surface 10 that bayonet unit forms is arranged to infundibulate, so that penholder is gone into.Shown in Fig. 3,4,5.

For the ease of drawing the circle of various radiuses, the center of circle of aperture 3 is arranged on the graduation mark 4 of scale value correspondence of ruler.Perhaps one section circular arc is portrayed at corresponding scale value place on ruler, and the radius of these circular arcs equals the length of the center of circle of fixing point 2 perpendicular to the vertical line of corresponding graduation mark 4, and the center of circle of aperture 3 just is arranged on these circular arcs.It is not intensive that aperture is set like this, is convenient to distinguish.The fixing hole center of circle is the difference of the scale value (generally being made as zero point) of fixing hole center of circle correspondence to the scale value of aperture center of circle correspondence to the distance in the aperture center of circle.

Claims

1. ruler is characterized in that: this ruler comprises a fixing hole and at least one aperture.

2. ruler according to claim 1 is characterized in that: fixing hole, little internal surface of hole are arranged to infundibulate.

3. ruler according to claim 1 and 2, it is characterized in that: at the fixing hole place one bayonet unit is set, this bayonet unit comprises buckle and following buckle, at last buckle and following buckle axle surface stuck point is set respectively, upper and lower buckle is adaptive, but both interlocks are firm; Adaptive after the buckle interlock up and down with the fixing hole of ruler, make ruler to rotate around the outer axial face of bayonet unit.

4. ruler according to claim 3 is characterized in that: the lower surface at following buckle is provided with one deck rubber.

5. ruler according to claim 3 is characterized in that: the inner surface that bayonet unit forms is arranged to infundibulate.

6. ruler according to claim 1 and 2 is characterized in that: the center of circle of aperture is arranged on the graduation mark of scale value correspondence of ruler.

7. ruler according to claim 6 is characterized in that: one section circular arc of corresponding scale value place portrayal on ruler, and the radius of circular arc equals the length of the center of circle of fixing point perpendicular to the vertical line of corresponding graduation mark; The center of circle of aperture is arranged on the circular arc.