CN111791631B

CN111791631B - Automatic compensation drawing compasses

Info

Publication number: CN111791631B
Application number: CN202010650336.8A
Authority: CN
Inventors: 张荣美; 薄其红; 秦虹; 罗远菊
Original assignee: Binzhou Polytechnic
Current assignee: Binzhou Polytechnic
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2022-03-01
Anticipated expiration: 2040-07-08
Also published as: CN111791631A

Abstract

The invention relates to the technical field of drawing instruments and discloses an automatic compensation drawing compass which comprises a handle, wherein a tooth groove is fixedly arranged at the bottom of the handle, gears are movably sleeved in the tooth groove, the number of the gears is two, the two gears are mutually meshed, a pin and a lead pin are respectively and fixedly arranged at the bottom of each gear, a needle seat is fixedly arranged at the bottom of each pin, a compression spring is fixedly arranged at the bottom of a thread adjusting rod, the bottom of each compression spring is in contact with a displacement rod, and meanwhile, the compression springs are in a compressed state to enable the compression springs to be always in a state of pushing the displacement rods, when a refill sleeved on the refill sleeve is used for drawing, the refill sleeve can be pushed to move downwards, so that the length of the refill is compensated, and the problem that the radius of the round drawing is continuously reduced along with the drawing when the array arrangement round pattern of the compass is used for drawing is avoided, the drawing precision of the compasses in the drawing process is improved.

Description

Automatic compensation drawing compasses

Technical Field

The invention relates to the technical field of drawing instruments, in particular to an automatic compensation drawing compass.

Background

The compasses are a very common drawing instrument, at mechanical drawing, the instrument that all can use in various drawing environments such as engineering drawing, major structure is that two intermeshing and the fixed gear of rotation center drive stitch and lead core foot rotate in step, fix the point portion of stitch and use the lead core foot to draw circularly, in addition, the compasses can also utilize the characteristic of self to carry out various derivative operations such as isometric segmentation to the straight line, provide various facilities for drawing.

The existing compasses all adopt the lead core as the refill of drawing, because it can be erased easily, can modify when drawing the mistake, but its length also shortens when the lead core in use constantly is consumed, when carrying out array arrangement circular pattern and drawing, can appear along with drawing the problem that the circular radius that draws constantly reduces, thereby the precision of drawing has been reduced, and before drawing can make the drawing paper leave the air between drawing paper and the fixed plate when fixing drawing paper and make the drawing paper appear undulant, and in the in-process of drawing promote the extrusion by the refill and the drawing orbit appears the deviation, the circumstances that the tip of refill scraped the drawing paper even can appear, to this, propose an automatic compensation compasses, aim at solving above-mentioned problem.

Disclosure of Invention

Aiming at the defects of the existing drawing compasses in the background technology in the using process, the invention provides the automatic compensation drawing compass which has the advantage of automatically compensating the long distance of a lead core during drawing and solves the problem of the reduction of drawing precision caused by the continuous reduction of the length of the lead core in the drawing process of the original drawing compass.

The invention provides the following technical scheme: an automatic compensation drawing compass comprises a handle, wherein the bottom of the handle is fixedly provided with a tooth socket, gears are movably sleeved in the tooth grooves, the number of the gears is two, the gears are mutually meshed, the bottom of the gear is respectively and fixedly provided with a pin and a lead pin, the bottom of the pin is fixedly provided with a needle seat, the bottom of the lead core pin is fixedly provided with a loop bar, the top of the inner cavity of the loop bar is fixedly provided with a compensation device, a displacement rod is movably sleeved on the position of the inner cavity of the loop bar, which is positioned at the bottom of the compensation device, guide strips are arranged on two sides of the displacement rod and extend out of the loop bar, the outer surface of the guide strip is fixedly provided with a rubber strip, the inside of the displacement rod is movably sleeved with a refill sleeve, the sliding rail type telescopic rod is characterized in that sliding rail plates are fixedly mounted on two sides of the outer surface of the sleeve rod, a sliding rail is arranged on one side of each sliding rail plate, and an adjusting device is sleeved inside the sliding rail in a movable mode.

Preferably, the compensation device comprises a thread adjusting rod, the thread adjusting rod is movably sleeved at the top of the inner cavity of the loop bar, a thread adjusting ring is movably sleeved on the outer surface of the thread adjusting rod through threads, a compression spring is fixedly mounted at the bottom of the thread adjusting rod, and the bottom of the compression spring is in contact with the displacement rod.

Preferably, the outer surface of the loop bar is provided with an arc-shaped groove at the positions at two sides of the thread adjusting ring, and the thread adjusting ring extends out of the arc-shaped groove.

Preferably, the adjusting device comprises a wheel shaft, two sides of the wheel shaft are movably sleeved inside a sliding rail on one side of the sliding rail plate, the wheel is movably sleeved on the outer surface of the wheel shaft, a rotating shaft is movably sleeved on the positions, located on two sides of the wheel, of the outer surface of the wheel shaft, a contact plate is fixedly installed on the outer surface of the rotating shaft, one end of the contact plate is in contact with the rubber strip, two ends, fixedly connected with the sliding rail plate, of the fixed shaft and the fixed shaft are movably sleeved inside the contact plate, a reset spring is fixedly installed at the top of the contact plate, a fixed top plate is fixedly installed at the top of the reset spring, and the fixed top plate is fixedly installed on the outer surface of the guide strip.

Preferably, the compression spring is in a compressed state.

Preferably, the return spring is in a compressed state.

Preferably, the material of the rubber strip is soft rubber.

The invention has the following beneficial effects:

1. according to the invention, the compression spring is fixedly installed at the bottom of the threaded adjusting rod, the bottom of the compression spring is in contact with the displacement rod, and meanwhile, the compression spring is in a compressed state, so that the compression spring is always in a state of pushing the displacement rod, and when the length of the pen core on the pen core sleeve is consumed during drawing, the pen core sleeve can be pushed to move downwards, thus the length of the pen core is compensated, the problem that the circular radius is continuously reduced along with drawing when the compasses draw circular patterns in array arrangement is used for drawing is avoided, and the drawing precision of the compasses in the drawing process is improved.

2. The invention can balance the compression spring in the compressed state by the compression spring being in the compressed state, and simultaneously, the one end of the contact plate is contacted with the rubber strip, so that the pushing force of the compression spring on the displacement rod and the pulling force of the contact plate on the displacement rod are balanced, the displacement rod can be in the stable state, and the situation that the displacement rod is directly pushed out under the action of the compression spring is avoided, on one hand, when the wheel is contacted with the drawing paper, the wheel shaft slides in the slide rail at one side of the slide rail plate, and the contact plate is driven to rotate by taking the axial line of the fixed shaft as the rotation center, so that one end of the contact plate is separated from the rubber strip, the displacement rod moves under the pushing of the compression spring, and the pen core in the displacement rod is contacted with the drawing paper, so as to draw, on the other hand, when the drawing is finished, the wheel is separated from the surface of the drawing paper, and reset under reset spring's effect, the one end of the in-process contact plate that resets contacts with the rubber strip and drives the displacement pole and retract back, has avoided this compasses displacement pole to stretch out the overlength and lead to the unable normal and drawing paper of wheel to take place to contact, has improved the stability of the device studio.

3. According to the invention, the arc-shaped grooves are formed in the positions, located on the two sides of the thread adjusting ring, of the outer surface of the sleeve rod, and the thread adjusting ring extends out of the arc-shaped grooves, so that the thread adjusting rod can be driven to move by rotating the thread adjusting ring, the compression degree of the compression spring is adjusted, the thrust force on the displacement rod is adjusted, the phenomenon that the thrust force on the displacement rod is reduced due to the fact that the compression degree of the compression spring is reduced due to overlong consumption of a refill in the displacement rod is avoided, the stress between the compression spring and the reset spring cannot be balanced, the displacement rod cannot extend normally when the wheel is in contact with drawing paper, and the stability of the device is further improved.

4. According to the invention, the sliding rail plates are fixedly arranged on the two sides of the outer surface of the sleeve rod, the sliding rail is arranged on one side of the sliding rail plate, and the adjusting device is movably sleeved in the sliding rail, so that when the device is used for drawing, the wheels on the two sides of the pen core can roll on the drawing paper constantly, and therefore, the drawing paper on the two sides of the pen core can keep level constantly, the problem that the drawing track is deviated or the drawing paper is scraped by the tip of the pen core under the pushing and extruding of the air between the drawing paper and the fixed plate by the pen core is avoided, and the use feeling of a user in the use process of the device is improved.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic right-view of the structure of the present invention;

FIG. 3 is a schematic right-side sectional view of the structure of the present invention;

FIG. 4 is a schematic sectional front view of the structure of the present invention;

FIG. 5 is a schematic view of a structural adjustment device of the present invention;

FIG. 6 is an enlarged view of the point A in FIG. 3 according to the present invention.

In the figure: 1. a handle; 2. a tooth socket; 3. a gear; 4. a stitch; 5. a lead core pin; 6. a needle seat; 7. a loop bar; 8. a compensation device; 81. a threaded adjusting rod; 82. a threaded adjustment ring; 83. a compression spring; 9. a displacement rod; 10. a guide strip; 11. a rubber strip; 12. a refill sleeve; 13. a slide rail plate; 14. an adjustment device; 141. a wheel axle; 142. a wheel; 143. a rotating shaft; 144. a contact plate; 145. a fixed shaft; 146. a return spring; 147. and fixing the top plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an automatic compensation drawing compass comprises a handle 1, a tooth socket 2 is fixedly installed at the bottom of the handle 1, a gear 3 is movably sleeved inside the tooth socket 2, the number of the gears 3 is two and is mutually engaged, a pin 4 and a lead pin 5 are respectively and fixedly installed at the bottom of the gear 3, a needle seat 6 is fixedly installed at the bottom of the pin 4, a loop bar 7 is fixedly installed at the bottom of the lead pin 5, a compensation device 8 is fixedly installed at the top of an inner cavity of the loop bar 7, the compensation device 8 comprises a thread adjusting rod 81, the thread adjusting rod 81 is movably sleeved at the top of the inner cavity of the loop bar 7, a thread adjusting ring 82 is movably sleeved on the outer surface of the thread adjusting rod 81 through threads, an arc-shaped groove is opened at the position of the outer surface of the loop bar 7 at two sides of the thread adjusting ring 82, the thread adjusting ring 82 extends out from the arc-shaped groove, a compression spring 83 is fixedly installed at the bottom of the thread adjusting rod 81, the compression spring 83 is in a compressed state, the displacement rod 9 is movably sleeved on the position, located at the bottom of the compensation device 8, of the inner cavity of the loop bar 7, the bottom of the compression spring 83 is in contact with the displacement rod 9, guide strips 10 are arranged on two sides of the displacement rod 9, the guide strips 10 extend out of the interior of the loop bar 7, rubber strips 11 are fixedly mounted on the outer surface of the guide strips 10, the rubber strips 11 are made of soft rubber, a refill sleeve 12 is movably sleeved on the interior of the displacement rod 9, slide rail plates 13 are fixedly mounted on two sides of the outer surface of the loop bar 7, a slide rail is arranged on one side of each slide rail plate 13, an adjusting device 14 is movably sleeved on the interior of each slide rail and comprises a wheel shaft 141, two sides of each wheel shaft 141 are movably sleeved inside the slide rail on one side of each slide rail plate 13, a wheel 142 is movably sleeved on the outer surface of each wheel shaft 141, a rotating shaft 143 is movably sleeved on the positions, located on two sides of each wheel 142, on the outer surface of each wheel 141, the outer surface of the rotating shaft 143 is fixedly provided with a contact plate 144, one end of the contact plate 144 is in contact with the rubber strip 11, the contact plate 144 is movably sleeved with a fixing shaft 145, two ends of the fixing shaft 145 are fixedly connected with the slide rail plate 13, the top of the contact plate 144 is fixedly provided with a return spring 146, the return spring 146 is in a compressed state, the top of the return spring 146 is fixedly provided with a fixing top plate 147, and the fixing top plate 147 is fixedly arranged on the outer surface of the guide strip 10.

Wherein, bottom fixed mounting through threaded adjusting pole 81 has compression spring 83, compression spring 83's bottom contacts with displacement pole 9, be in the state of compressed through compression spring 83 simultaneously, make compression spring 83 be in under the state that promotes displacement pole 9 always, length is consumed and can push refill cover 12 downstream when the refill on refill cover 12 is drawing, thereby compensate the length of refill, avoided the compasses when carrying out array arrangement circular shape pattern and drawing, the problem that the circular radius that draws constantly reduces along with drawing, the drawing precision of this compasses at the drawing in-process has been improved.

Wherein, the return spring 146 is in a compressed state, the compression spring 83 in the compressed state can be balanced, and meanwhile, one end of the contact plate 144 is in contact with the rubber strip 11, so that the pushing force of the compression spring 83 acting on the displacement rod 9 is balanced with the pulling force of the contact plate 144 acting on the displacement rod 9, so that the displacement rod 9 can be in a stable state, and the situation that the displacement rod 9 is directly pushed out under the action of the compression spring 83 is avoided, on one hand, when the wheel 142 is in contact with the drawing paper, the wheel shaft 141 slides in the slide rail at one side of the slide rail plate 13, and drives the contact plate 144 to rotate by taking the axis of the fixed shaft 145 as the rotation center, so that one end of the contact plate 144 is separated from the rubber strip 11, at this time, the displacement rod 9 moves under the pushing of the compression spring 83, and makes the refill in the displacement rod 9 contact with the drawing paper, thereby drawing, on the other hand, after drawing, wheel 142 breaks away from with the drawing paper surface to reset under the effect of reset spring 146, the one end of contact plate 144 and the contact of rubber strip 11 and drive displacement rod 9 and retract back in the reset process, avoided this compasses that displacement rod 9 appears stretching out the overlength and lead to wheel 142 can't normally take place the contact with the drawing paper, improved the stability of the device studio.

Wherein, set up the arc wall and the adjustable screw ring 82 stretches out from this arc wall on the position that lies in adjustable screw ring 82 both sides through loop bar 7 surface, thereby make and to drive adjustable screw ring 81 through rotating adjustable screw ring 82 and remove thereby the compression degree of adjusting compression spring 83 and adjust the thrust that displacement pole 9 received, the refill of having avoided in the displacement pole 9 consumes the overlength and makes the compression degree that compression spring 83 received reduce and make the thrust that displacement pole 9 received descend, the unable normal extension of displacement pole 9 when leading to the unable balance of stress between compression spring 83 and the reset spring 146 to make wheel 142 and drawing paper contact, the stability of the device has further been improved.

Wherein, both sides fixed mounting through the loop bar 7 surface has slide rail version 13, slide rail and this slide rail's inside activity has been seted up to slide rail version 13 one side and has been cup jointed adjusting device 14, the device that makes is when drawing, the wheel 142 of the both sides of refill can roll on the drawing paper constantly, thereby the drawing paper that makes the refill both sides can keep leveling constantly, the air of having avoided between drawing paper and the fixed plate promotes to make the drawing orbit appear the problem that deviation or refill pointed end scraped the drawing paper under the extrusion at the refill, user's use impression has been improved in the device use.

The using method of the invention is as follows:

before use, the pencil lead sleeve 12 is arranged inside the displacement rod 9, and the pin 4 and the pencil lead pin 5 are pulled to a certain angle.

During the use, fix needle file 6 on the drawing paper, make wheel 142 contact with the drawing paper simultaneously, the shaft 141 slides in the slide rail of slide rail version 13 one side in the contact, and drive the contact plate 144 and use the axis of fixed axle 145 as the center of rotation and rotate and make the one end of contact plate 144 break away from with rubber strip 11, displacement rod 9 takes place to remove and makes the refill in the displacement rod 9 contact with the drawing paper under compression spring 83's promotion this moment, thereby make refill and drawing paper contact in the refill cover 12 and carry out the drawing, and can compensate constantly under compression spring 83's promotion in-process displacement rod 9 of drawing, the one end of contact plate 144 contacts with rubber strip 11 and drives displacement rod 9 and retract under return spring 146 reset action after wheel 142 lifts up.

When the consumption of the cartridge is too large, the threaded adjusting ring 82 is simultaneously rotated to drive the threaded adjusting rod 81 to move downward and increase the compression degree of the compression spring 83.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic compensation drawing compasses, includes handle (1), its characterized in that: the bottom fixed mounting of handle (1) has tooth's socket (2), the inside movable sleeve of tooth's socket (2) is equipped with gear (3), the quantity of gear (3) is intermeshing between two and, the bottom of gear (3) is fixed mounting respectively has stitch (4) and lead core foot (5), the bottom fixed mounting of stitch (4) has needle file (6), the bottom fixed mounting of lead core foot (5) has loop bar (7), the top fixed mounting of loop bar (7) inner chamber has compensation arrangement (8), the movable sleeve joint has displacement rod (9) on the position that loop bar (7) inner chamber is located compensation arrangement (8) bottom, the both sides of displacement rod (9) are equipped with gib block (10) and gib block (10) stretch out from the inside of loop bar (7), the fixed surface of gib block (10) installs rubber strip (11), the pencil core sleeve (12) is movably sleeved in the displacement rod (9), the sliding rail plates (13) are fixedly installed on two sides of the outer surface of the sleeve rod (7), the sliding rail is arranged on one side of each sliding rail plate (13), the adjusting device (14) is movably sleeved in the sliding rail, the adjusting device (14) comprises a wheel shaft (141), two sides of the wheel shaft (141) are movably sleeved in the sliding rail on one side of each sliding rail plate (13), the wheel (142) is movably sleeved on the outer surface of the wheel shaft (141), the rotating shaft (143) is movably sleeved on the positions, located on two sides of the wheel (142), of the outer surface of the rotating shaft (143), a contact plate (144) is fixedly installed on the outer surface of the rotating shaft (143), one end of the contact plate (144) is in contact with the rubber strip (11), the fixing shaft (145) is movably sleeved in the contact plate (144), and two ends of the fixing shaft (145) are fixedly connected with the sliding rail plates (13), the top fixed mounting of contact board (144) has reset spring (146), reset spring (146) are in the state of compressing, the top fixed mounting of reset spring (146) has fixed roof (147), fixed roof (147) and the surface fixed mounting of gib block (10).

2. The automatic compensation drawing compass according to claim 1, wherein: compensation arrangement (8) include screw thread regulation pole (81), screw thread regulation pole (81) activity cup joints at the top of loop bar (7) inner chamber, screw thread regulation ring (82) have been cup jointed through the screw thread activity to the surface of screw thread regulation pole (81), the bottom fixed mounting of screw thread regulation pole (81) has compression spring (83), the bottom and displacement pole (9) of compression spring (83) contact.

3. The automatic compensation drawing compass according to claim 2, wherein: the outer surface of the loop bar (7) is provided with arc-shaped grooves at the positions at two sides of the thread adjusting ring (82), and the thread adjusting ring (82) extends out of the arc-shaped grooves.

4. The automatic compensation drawing compass according to claim 2, wherein: the compression spring (83) is in a compressed state.

5. The automatic compensation drawing compass according to claim 1, wherein: the rubber strip (11) is made of soft rubber.