CN215041722U

CN215041722U - Radian compasses

Info

Publication number: CN215041722U
Application number: CN202121202634.7U
Authority: CN
Inventors: 宋树培; 赵甜甜; 宋涵琼; 宋涵博
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-07
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses an radian compasses, including cylindrical hollow shell that has the circle scale mark, be fixed in hollow shell center pin department the fixed gear, with fixed gear engaged with move the gear, set up in the knob of fixed gear up end, set up in the fixed arm of terminal surface under the fixed gear, set up in the tape measure of fixed arm lower extreme, set up in moving gear up end and the actuating arm that is connected with the knob, set up in the spacing arm of terminal surface under the moving gear, wear in the spacing arm lateral hole and can be in the swing arm that the side opening removed, the upper end of swing arm is ball-hinged with the lower terminal surface of fixed gear, the chi end of tape measure is connected with the lower extreme of swing arm, have on the circle scale mark matched with pointer. Use the embodiment of the utility model provides a technical scheme can be more simple and convenient draw known radian and radial arc, with the protractor, the ruler, the compasses instrument is trinity, draws the arc and need not be with the help of ruler and protractor, and a thing is multi-purpose, carries and uses more conveniently.

Description

Radian compasses

Technical Field

The utility model relates to a compasses technical field especially relates to a radian compasses.

Background

The traditional compasses can only be matched with a ruler and a protractor to draw the arc length, more tools are used, the operation difficulty is high, and the human error is large. The current decoration industry, the design industry, need comparatively accurate and laborsaving method in during operation, its work needs include but not limited to drawing the arc, but in its trade, the arc is a very important ring.

The existing compasses can rotate around the circle center and are provided with a scale supporting rod by erecting a scale disc, and a slidable drawing pen and a telescopic marking pen positioned at the center position are arranged on the supporting rod, so that the circle center angle and the radian value of the drawn circle or the circular arc can be determined while the radius of the drawn circle or the circular arc is read.

However, the device is heavy, large and inconvenient to carry, and cannot work in some special working environments; the device has more unfixed accessories, more complex connection modes, slight damage and troublesome repair.

In summary, how to effectively solve the problem that the ordinary compasses cannot directly draw the arc length with the known radius and degree and the like is a problem which needs to be solved urgently by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a radian compasses, this radian compasses have solved the unable arc length scheduling problem of directly drawing known radius and number of degrees of ordinary compasses.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides an radian compasses, including the cylindrical hollow shell that has the circle scale mark, be fixed in the fixed gear of hollow shell center pin department, with fixed gear engaged with moving gear, set up in the knob of fixed gear up end, set up in the fixed arm of terminal surface under the fixed gear, set up in the tape measure of fixed arm lower extreme, set up in moving gear up end and the actuating arm that is connected with the knob, set up in the spacing arm of terminal surface under the moving gear, wear in the spacing arm side hole and can be at the swing arm that the side opening removed, the upper end of swing arm is ball-hinged with the lower terminal surface of fixed gear, the chi end of tape measure is connected with the lower extreme of swing arm, have on the actuating arm with circle scale mark matched with pointer.

Preferably, the upper end of the movable arm is provided with a ball, the lower end face of the fixed gear is provided with a circular ring body hole, and the ball is arranged in the circular ring body hole.

Preferably, the sphere comprises two hemispheres, the upper end of the movable arm is circular, two sides of the movable arm are provided with columns, and the inner sides of the hemispheres are provided with column holes matched with the columns.

Preferably, the top of the hollow shell is provided with a transparent round cover, and the round scale marks are arranged on the transparent round cover.

Preferably, the inner wall of the hollow housing is provided with teeth capable of meshing with the moving gear.

Preferably, the height of the moving gear is smaller than that of the fixed gear.

Preferably, the radius of the moving gear is smaller than that of the fixed gear.

Preferably, the knob and the driving arm are connected by a link.

The utility model provides a radian compasses, including hollow shell, fixed gear, movable gear, knob, decide arm, tape measure, actuating arm, spacing arm, swing arm. The fixed gear is fixed at the central shaft of the hollow shell and is relatively fixed with the hollow shell. The fixed arm is arranged on the lower end face of the fixed gear and is equivalent to a foot fixed in the traditional compasses. The hollow shell is also internally provided with a moving gear which is meshed with the fixed gear, and after the fixed gear is positioned, the moving gear is driven to rotate around the fixed gear. The driving arm is arranged on the upper end face of the moving gear, the driving arm is connected with the knob, the knob is arranged on the upper end face of the fixed gear, namely the driving arm and the knob are relatively fixed, and the knob is rotatable. The driving knob rotates to drive the driving arm to rotate, namely, the driving gear rotates around the fixed gear. The upper end of the movable arm is connected with the lower end face of the fixed gear, and the movable arm is equivalent to a foot used for drawing a circle by the traditional compasses, so that the movable arm is driven to rotate, and an arc is drawn.

The upper end of the movable arm is in ball hinge joint with the lower end face of the fixed gear, and the movable arm can rotate at a ball hinge point. The limiting arm is arranged on the lower end face of the moving gear, a side hole is formed in the lower portion of the limiting arm, the movable arm penetrates through the side hole of the limiting arm and can move in the side hole, the movable arm moves along the side hole while rotating at the ball hinge point, and therefore the movable arm can only rotate along the direction of the side hole at the ball hinge point, namely the movable arm is pulled open.

The box of the tape measure is arranged at the lower end of the fixed arm, the tape end of the tape measure is connected and fixed with the lower end of the movable arm, the tape measure is gradually unfolded along with the pulling of the movable arm, and the unfolded length is the arc length radius. Preferably, the scale on the tape measure is in centimeters, and the arc length radius can be accurately determined.

The hollow shell is cylindrical, and the hollow shell is provided with circular scale marks so as to accurately count the arc angle. The driving arm is provided with an indicating needle matched with the circle scale lines, the indicating needle has a belt direction, and the scale number of the indicating needle in rotation is the arc length radian.

When the radian compasses are used, the fixed arm is fixed, the movable arm is pulled away according to the radius of a required arc, the pulled-away length is the length expanded by the tape measure, the knob is rotated to drive the driving arm between the knob and the movable arm to rotate, and further the movable gear is driven to rotate, the movable arm is driven by the stress of the movable gear through the limiting arm to rotate around the spherical hinge point, the hollow shell with the circle scale line is observed, the angle required to be drawn is determined, and the arc drawing is completed.

The utility model provides a radian compasses rotates according to the interlock between the gear and realizes that the compasses is whole motionless, only moves the swing arm, realizes pulling open the swing arm through the ball hinge point at swing arm top and draws the arc, and the distance that pulls open of swing arm is the radius, and the angular display of pointer is the radian, utilizes simple arc length formula, alright draw out the arc length easily. Use the embodiment of the utility model provides a technical scheme can be more simple and convenient draw known radian and radial arc, with the protractor, the ruler, the compasses instrument is trinity, draws the arc and need not be with the help of ruler and protractor, and a thing is multi-purpose, carries and uses more conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a radian compass provided in a specific embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a side view of FIG. 1;

FIG. 5 is an internal structural view;

fig. 6 is a schematic view of the connection of the ball and the boom.

The drawings are numbered as follows:

1-knob, 2-transparent round cover, 3-hollow shell, 4-spacing arm, 5-fixed arm, 6-box, 7-measuring tape, 8-movable arm, 9-pointer, 10-fixed gear, 11-moving gear, 12-sphere, 13-driving arm and 14-column.

Detailed Description

The core of the utility model is to provide a radian compasses, this radian compasses have solved the unable arc length scheduling problem of directly drawing known radius and number of degrees of ordinary compasses.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 6, fig. 1 is a schematic structural view of a radian compass according to an embodiment of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 3 is a bottom view of FIG. 1; FIG. 4 is a side view of FIG. 1; FIG. 5 is an internal structural view; fig. 6 is a schematic view of the connection of the ball and the boom.

In a specific embodiment, the utility model provides an radian compasses, including cylindrical hollow shell 3 that has the circle scale mark, be fixed in hollow shell 3 center pin department decide gear 10, with decide gear 10 engaged with move gear 11, set up in the knob 1 of deciding gear 10 up end, set up in deciding gear 10 down the fixed arm 5 of terminal surface, set up in the tape measure 7 of deciding arm 5 lower extreme, set up in moving gear 11 up end and the actuating arm 13 that is connected with knob 1, set up in spacing arm 4 of terminal surface under moving gear 11, wear in spacing arm 4 lateral hole and can be in the swing arm 8 of side opening removal, the upper end of swing arm 8 is ball-hinged with the lower terminal surface of deciding gear 10, the chi end of tape measure 7 is connected with the lower extreme of swing arm 8, have on the actuating arm 13 with circle scale mark matched with pointer 9.

In the structure, the radian compasses comprise a hollow shell 3, a fixed gear 10, a movable gear 11, a knob 1, a fixed arm 5, a measuring tape 7, a driving arm 13, a limiting arm 4 and a movable arm 8.

The fixed gear 10 is fixed at the central shaft of the hollow shell 3, and the fixed gear 10 is fixed relative to the hollow shell 3. The fixed arm 5 is arranged on the lower end face of the fixed gear 10 and is equivalent to a foot fixed in the traditional compasses.

A moving gear 11 is further arranged in the hollow shell 3, the moving gear 11 is meshed with a fixed gear 10, after the fixed gear 10 is positioned, the moving gear 11 is driven, and the moving gear 11 rotates around the fixed gear 10.

The driving arm 13 is arranged on the upper end surface of the moving gear 11, the driving arm 13 is connected with the knob 1, the knob 1 is arranged on the upper end surface of the fixed gear 10, namely, the driving arm 13 and the knob 1 are relatively fixed, and the knob 1 can rotate. The driving arm 13 is driven to rotate by the rotation of the driving knob 1, that is, the driving gear 11 is driven to rotate around the fixed gear 10. The upper end of the movable arm 8 is connected with the lower end face of the fixed gear 10, the movable arm 8 is equivalent to a foot used for drawing a circle by the traditional compasses, and then the movable arm 8 is driven to rotate to finish drawing an arc.

The upper end of the movable arm 8 is in ball joint with the lower end face of the fixed gear 10, and the movable arm 8 can rotate at the ball joint. The limiting arm 4 is arranged on the lower end face of the moving gear 11, a side hole is formed in the lower portion of the limiting arm 4, the movable arm 8 penetrates through the side hole of the limiting arm 4, the movable arm 8 can move in the side hole, the movable arm 8 moves along the side hole while rotating at the ball hinge point, and therefore the movable arm 8 can only rotate along the direction of the side hole at the ball hinge point, namely the movable arm 8 is pulled open.

The box 6 of the measuring tape 7 is arranged at the lower end of the fixed arm 5, the measuring tape 7 is connected and fixed with the lower end of the movable arm 8, the measuring tape 7 is gradually unfolded along with the pulling of the movable arm 8, and the unfolded length is the arc length radius. Preferably, the scale on the tape 7 is in centimeters, and the arc length radius can be accurately determined.

The hollow housing 3 is cylindrical and has a circular graduation mark on the hollow housing 3, preferably a 360 ° graduation, in order to accurately count the arc angles. The driving arm 13 is provided with an indicating needle 9 matched with the circle scale mark, the indicating needle 9 has a direction, and the scale number of the rotation of the indicating needle 9 is the arc length radian.

When the radian compasses are used, the fixed arm 5 is fixed, the movable arm 8 is pulled according to the radius of a required arc, the pulled length is the length expanded by the tape measure 7, the knob 1 is rotated, the knob 1 drives the driving arm 13 between the knob 1 and the movable arm 8 to rotate, and then the movable gear 11 is driven, the movable gear 11 is stressed to drive the movable arm 8 to rotate around a spherical hinge point through the limiting arm 4, the hollow shell 3 with a circle scale line is observed, the angle required to be drawn is determined, and the arc drawing is completed.

For example, when an arc length of 30 ° with a radius of 10cm is drawn:

and fixing the fixed arm 5, pulling the movable arm 8 by a distance of 10cm, rotating the knob 1 to drive the driving arm 13 and the movable arm 8, and rotating the indicator needle 9 by 30 degrees to finish arc drawing.

The utility model provides a radian compasses rotates according to the interlock between the gear and realizes that the compasses is whole motionless, only moves movable arm 8, realizes pulling open movable arm 8 through the ball hinge point at movable arm 8 top and draws the arc, and the distance that pulls open of movable arm 8 is the radius, and the angle display of pointer 9 is the radian, utilizes simple arc length formula, alright draw out the arc length easily. Use the embodiment of the utility model provides a technical scheme can be more simple and convenient draw known radian and radial arc, with the protractor, the ruler, the compasses instrument is trinity, draws the arc and need not be with the help of ruler and protractor, and a thing is multi-purpose, carries and uses more conveniently.

The radian compasses are only a preferred scheme, are particularly not limited to the radian compasses, can be limited in a targeted manner according to actual needs on the basis, and the lower end face of the fixed gear 10 is provided with a deep circular ring body hole, wherein the circular ring body is a cube obtained by rotating a circle by taking the circle as a face and taking a point outside the circle as a center. The upper end of the movable arm 8 is provided with a ball 12, and the ball 12 is arranged in the circular ring body hole. As the moving gear 11 engages with the fixed gear 10 to rotate, the movable arm 8 rotates around the fixed arm 5, and the top ball 12 of the movable arm 8 moves in the circular ring body hole to play a fixing role. The movable arm 8 is in spherical hinge connection with the fixed gear 10 through the matching of the sphere 12 and the circular ring body hole, and the structure is simple and easy to realize.

On the basis of the above embodiments, the sphere 12 includes two hemispheres, the upper end of the movable arm 8 is circular, the two sides of the movable arm are provided with the columns 14, the inner sides of the hemispheres are provided with the column holes matched with the columns 14, and the two hemispheres and the upper end of the movable arm 8 are connected in a manner of splicing and inserting the main body and the column holes. The two hemispheres and the upper end of the movable arm 8 are assembled to form a sphere 12, so that the movable arm 8 rotates around the sphere 12, and the movable arm 8 is opened and closed.

On the basis of the above embodiments, the top of the hollow shell 3 is provided with the transparent round cover 2, so that the components inside the hollow shell 3 are encapsulated and are safe. The dome is transparent dome 2, conveniently observes hollow shell 3 internals and moves. The circle scale marks are arranged on the transparent round cover 2, and the pointer 9 indicates the circle scale marks, so that the angle reading is convenient.

On the basis of the above embodiments, the hollow housing 3 has a cylindrical shape, and the inner wall is provided with teeth, and the teeth of the hollow housing 3 can be engaged with the moving gear 11. Hollow shell 3 is fixed, and fixed gear 10 is fixed at central point, and the tooth that moves gear 11 interlock fixed gear 10 and hollow shell 3 rotates, and the tooth of fixed gear 10 and hollow shell 3 will move 11 both sides of gear and press from both sides tightly, and it is more stable to move gear 11 and rotate, reduces to rock, and it is more accurate to draw the arc.

Preferably, the external radius of the fixed gear 10, the external diameter of the moving gear 11 and the thickness of the hollow shell 3 with teeth are equal to the radius of the transparent round cover 2, and the side wall of the round cover is flush with the outer wall of the hollow shell 3, so that the round cover is tidy and beautiful. The axis directions of the knob 1, the driving arm 13 and the limiting arm 4 are coincided with the axis direction of the gear, and the arc drawing precision is high.

In order to drive the knob 1 conveniently, a cylinder can be fixed on the fixed gear 10, a through hole is formed in the round cover, the cylinder is opposite to the through hole, and the knob 1 is installed on the cylinder.

In addition to the above embodiments, the height of the moving gear 11 is smaller than that of the fixed gear 10, and the lower end surface of the moving gear 11 is located at a high position, so that even when the extension length of the boom 8 is long and the arc of the boom 8 approaches a straight angle, the boom 8 does not touch the moving gear 11, that is, the moving gear 11 does not interfere with the extension of the boom 8, and the application range is wide.

Further optimize above-mentioned technical scheme, the radius of moving gear 11 all is less than the radius of fixed gear 10, and moving gear 11 is less, easily drives, and the drive is comparatively laborsaving.

On the basis of the above specific embodiments, the knob 1 and the driving arm 13 are connected through a connecting rod, the connecting rod connects the knob 1 and the driving arm 13 into a whole, and the driving arm 13 is driven to rotate by driving the knob 1, so that the structure is simple and the connection is easy.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The radian compasses provided by the utility model are introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radian compass is characterized by comprising a cylindrical hollow shell (3) with a circle scale mark, a fixed gear (10) fixed at the central shaft of the hollow shell (3), a moving gear (11) meshed with the fixed gear (10), a knob (1) arranged on the upper end surface of the fixed gear (10), a fixed arm (5) arranged on the lower end surface of the fixed gear (10), a measuring tape (7) arranged at the lower end of the fixed arm (5), a driving arm (13) arranged on the upper end surface of the moving gear (11) and connected with the knob (1), a limiting arm (4) arranged on the lower end surface of the moving gear (11), and a movable arm (8) penetrating in a side hole of the limiting arm (4) and capable of moving in the side hole, the upper end of the movable arm (8) is in ball hinge joint with the lower end surface of the fixed gear (10), the ruler end of the measuring tape (7) is connected with the lower end of the movable arm (8), and the driving arm (13) is provided with an indicating needle (9) matched with the circle scale mark.

2. The compasses of claim 1, wherein said movable arm (8) has a ball (12) at its upper end, and said fixed gear (10) has a circular ring hole at its lower end, said ball (12) being embedded in said circular ring hole.

3. The compasses according to claim 2, characterized in that said sphere (12) comprises two hemispheres, said movable arm (8) has a circular upper end and two sides with a post (14), and the inner side of said hemispheres has a post hole matching with the post (14).

4. The compasses of claim 1, wherein the top of said hollow casing (3) has a transparent dome (2), and the circle graduation marks are provided on the transparent dome (2).

5. The compasses according to claim 1, characterized in that the inner wall of the hollow casing (3) is provided with teeth which can mesh with the moving gear (11).

6. The compasses according to any one of claims 1 to 5, characterized in that the height of the moving gear (11) is less than the height of the fixed gear (10).

7. The compasses according to claim 6, characterized in that the radii of the moving gears (11) are each smaller than the radius of the fixed gear (10).

8. The compasses of claim 1, wherein said knob (1) and driving arm (13) are connected by a connecting rod.