CN111561909A - Rocket army command ruler - Google Patents

Rocket army command ruler Download PDF

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Publication number
CN111561909A
CN111561909A CN202010444311.2A CN202010444311A CN111561909A CN 111561909 A CN111561909 A CN 111561909A CN 202010444311 A CN202010444311 A CN 202010444311A CN 111561909 A CN111561909 A CN 111561909A
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CN
China
Prior art keywords
needle
ruler
ruler body
cylinder
rocket
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Granted
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CN202010444311.2A
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Chinese (zh)
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CN111561909B (en
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朱晖
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Individual
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Individual
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/02Means for marking measuring points
    • G01C15/06Surveyors' staffs; Movable markers
    • G01C15/08Plumbing or registering staffs or markers over ground marks

Abstract

The invention provides a rocket military command ruler, which relates to the technical field of military measuring instruments.

Description

Rocket army command ruler
Technical Field
The invention relates to the technical field of military measuring instruments, in particular to a rocket military command rule.
Background
The rocket military commander ruler is a common tool for rocket military commanders and has two main purposes. Firstly, carry out geographical coordinate, plane rectangular coordinate, azimuth, slope, length measurement on for military use topographic map, secondly utilize the supplementary rocket military commander of plotting die orifice to carry out the quick plot of army's label commonly used, promote the operation plotting speed. Through the two basic functions, the aims of assisting the rocket military commander to command the operation on the chart and improving the speed of the rocket military commander are fulfilled.
The existing rocket military command rule can only be used for measuring and plotting die holes on a map, plays a role in drawing, cannot measure the coordinates of a target point, and has a single function. The coordinates and elevation of the surveying and mapping target point mainly depend on analyzing the topography of the target point and then finding the coordinates of the corresponding position on a map or surveying and mapping by a military surveying and mapping instrument. Finding a target point by analyzing the terrain is easily limited and can generally only be done with a wide field of view and a clear target. The surveying instrument is large in size and has certain weight, and the carrying of an individual soldier is very troublesome. Therefore, a rocket troop command ruler capable of mapping is needed.
Disclosure of Invention
The invention aims to provide a rocket army command rule, which can provide a solution for the problem of single function of the command rule in the prior art and has the beneficial effect of quickly surveying and mapping coordinates and elevations of target points.
The embodiment of the invention is realized by the following steps:
the embodiment of the application provides a rocket military commander ruler, which comprises a ruler body, wherein the ruler body is provided with a positioning part, the positioning part is provided with a needle pricking hole, and the center of the needle pricking hole is aligned with the edge of the ruler body;
the puncture needle is matched with the puncture hole, and salient points are arranged on the suspension wires at equal intervals.
In some embodiments of the invention, the suspension wire is arranged on an automatic take-up device, the automatic take-up device includes a housing, an upright post and a winding wheel disc, the housing is arranged on the ruler body, the upright post is fixed inside the housing, a winding groove is arranged on the peripheral surface of the winding wheel disc, a through hole is arranged on the end surface of the winding wheel disc, and the through hole is matched with the upright post.
In some embodiments of the present invention, a groove is disposed on an end surface of the winding wheel disc, a coil spring is disposed in the groove, one end of the coil spring is fixedly connected to the pillar, and the other end of the coil spring is fixedly connected to a side wall of the groove.
In some embodiments of the invention, the edge of the ruler body aligned with the center of the puncture hole is provided with a hanging line part, and the hanging line part is in an inverted triangle shape.
In some embodiments of the present invention, a pull ring is disposed at an end of the suspension wire away from the automatic wire rewinding device.
In some embodiments of the invention, the needle comprises a handle, a cylinder and a needle point, the handle is fixed at one end of the cylinder, the needle point is fixed at the other end of the cylinder, and the cylinder is matched with the needle inserting hole.
In some embodiments of the present invention, the ruler body is provided with a needle fixing device, the needle fixing device includes a needle cylinder and a magnetic ring, the magnetic ring is fixed in the needle cylinder, and the cylinder is a metal cylinder capable of being attracted by the magnetic ring.
In some embodiments of the invention, the ruler body comprises a first ruler body and a second ruler body, the first ruler body is provided with a first hinge, the second ruler body is provided with a second hinge, and the first hinge and the second hinge are matched.
In some embodiments of the present invention, the suspension wires comprise nylon suspension wires, and the distance between the salient points is 0.5 cm to 2 cm.
In some embodiments of the invention, the ruler body is provided with scale marks and auxiliary plotting die holes.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
1. and (6) mapping coordinates of the target point. The map is horizontally placed, the north of the map is returned by using a north indicator, a standing point is found on the map, and a positioning part is positioned at the position of the standing point on the map by using a needle to penetrate through a needle pricking hole. The wire is then suspended with the head held stationary, moved so that the wire just blocks the target point and the lowest end of the wire just touches the map. The ruler body rotates around the puncture needle until the edge of the ruler body where the puncture hole is located just contacts the lowest end of the suspension wire, and at the moment, the eyes, the suspension wire, the actual target point and the edge are located on the same vertical plane. And finally, drawing a straight line on the map along the edge by using a pencil. And changing a place to determine a standing point, repeating the operation, and drawing a straight line. The intersection point of the two straight lines is the position of the target point on the map, and the coordinates of the target point can be directly read out on the map.
2. And (6) surveying and mapping the elevation of the target point. After the coordinates of the target point are measured by the method, the horizontal distance from the target point to the standing point can be calculated according to a mathematical formula. Then the positions of the observed eyes and the puncture hole are basically the same, the suspension wire is moved to enable the suspension wire to just block the target point, and the lowest end of the suspension wire just contacts the map. And (3) rotating the ruler body around the pricking pin until the edge of the ruler body where the pricking hole is located just contacts the lowest end of the suspension wire, reading the distance between the contact point and the pricking hole, and estimating the height of the target point on the suspension wire from a map through the convex point. The relative elevation of the target point can be obtained through the corresponding mathematical formula.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a rocket military command ruler provided in an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural view of an automatic wire take-up device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a winding wheel disc according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a needle according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a needle fastening device according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a first hinge and a second hinge provided in an embodiment of the present invention;
FIG. 8 is a schematic diagram of measuring coordinates of a target point according to the present invention;
FIG. 9 is a schematic diagram of measuring the elevation of a target point according to the present invention.
Icon: 1-ruler body, 11-first ruler body, 12-second ruler body, 13-auxiliary plotting die hole, 2-positioning part, 21-needle pricking hole, 3-needle pricking, 31-handle, 32-cylinder, 33-needle point, 4-suspension wire, 41-salient point, 42-pull ring, 5-automatic take-up device, 51-shell, 52-upright post, 53-wire winding wheel disc, 531-through hole, 532-winding groove, 533-groove, 54-coil spring, 6-suspension part, 7-needle pricking fixing device, 71-needle cylinder, 72-magnetic ring, 8-first hinge and 9-second hinge.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" represents at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Referring to fig. 1-9, a structure and usage of a command ruler for rocket troops according to an embodiment of the present invention are shown.
As shown in fig. 1, a rocket military commander ruler is provided for the embodiment of the present application, which includes a ruler body 1, a positioning portion 2 is disposed at the upper left corner of the ruler body 1, and the positioning portion 2 and the ruler body 1 are integrally formed. The positioning part 2 is provided with a needle pricking hole 21, and the center of the needle pricking hole 21 is aligned with the edge of the ruler body 1.
The embodiment of the application also comprises a puncture needle 3 and a suspension wire 4. The needle 3 can be inserted into the needle insertion hole 21 and fit into the needle insertion hole 21. That is, the needle 3 is inserted into the needle insertion hole 21 with substantially no gap (the gap is not left as much as possible to reduce the error caused by the looseness of the ruler body 1), and the ruler body 1 is rotatable around the inserted needle 3.
The suspension wires 4 are equidistantly provided with salient points 41, and the distance between the salient points 41 on the suspension wires 4 is 0.5 cm to 2 cm for better observation and recording. Further, the interval between the bumps 41 may be selected to be 1 cm.
It should be noted that if the pitch of the bumps 41 is less than 0.5 cm, the bumps 41 are too many in a distance and difficult to be counted. If the pitch of the bumps 41 is greater than 2 cm, the distance between the bumps 41 and the target point is difficult to estimate, and the error is large.
Method of measuring coordinates of target points: as shown in fig. 8 (if the mountain tip is the target point), the map is fixed on the drawing board, the drawing board is horizontally placed by using the support, and the north-seeking needle is used for north-seeking. The position information of the standing point is found on a map by analyzing the terrain (or the coordinates of the standing point are directly positioned by the Beidou handset). The ruler body 1 is moved to enable the needle pricking hole 21 to be aligned with the position of the standing point on the map, and the needle 3 is taken out to be aligned with the standing point in the needle pricking hole 21 to be pricked. Due to the matching relationship of the needle inserting hole 21 and the needle inserting 3, the ruler body 1 can rotate around the needle inserting 3 and can not be loosened obviously. Then hold the suspension wire 4 with a certain height from the map, let the suspension wire 4 hang, the lowest part of the suspension wire 4 just contacts the map, move the suspension wire 4 to block the target point. Then the head is kept still, the suspension wire 4 is kept still by one hand, and the ruler body 1 is rotated by the other hand, so that the edge of the ruler body 1 aligned with the pricking hole 21 just contacts the suspension wire 4. A pencil was used to draw a first straight line along the edge.
And changing a standing point to repeat the operation, and drawing a second straight line. The intersection point of the two drawn straight lines is the position of the target point on the map, and the coordinates of the target point on the map can be directly read out according to the map.
The method for measuring the elevation of the target point comprises the following steps: after the coordinate of the target point is measured by changing one standing point, the position is kept still, the map is taken down and folded along the standing point, then the side where the standing point and the target point are located is fixed on the drawing board again, the fold line is aligned with the edge of the drawing board (the edge is the edge where the drawing board is closest to a person), then the drawing board is kept horizontal, and the north-seeking compass is used for north return. The needle punching hole 21 of the positioning part 2 is then aligned with the standing point on the map, so that the edge of the ruler body 1 is aligned with the second straight line. The principle is as shown in fig. 9, the same hand holds the suspension wire 4 to hang, so that the salient point 41 at the lowest part of the suspension wire 4 just contacts the map, and the eyes of the user are close to the standing point on the map (the standing point is at the edge of the drawing board and is convenient for the eyes to approach). The moving suspension wire 4 blocks the target point, the lowest end of the suspension wire 4 just contacts the edge of the ruler body 1 at the moment, and the scale mark c of the contact position on the ruler body 1 is read (the scale mark starting from the pricking hole 21 is arranged on the edge of the ruler body 1). And counting the number of the salient points 41 from bottom to top until a certain salient point 41 just blocks the position of the target point, and calculating the distance d.
When the elevation is calculated, it is shown in fig. 9. Knowing the coordinates of the standing point and the target point, the distance from the standing point to the target point can be calculated as b, and the elevation a of the target point relative to the standing point can be calculated through a corresponding mathematical formula.
It should be noted that, if the target point is located between the two bumps 41, the estimation is performed, for example, the target point is located at the middle position of the two bumps 41, and then 0.5 bumps 41 are added.
The measurement method is less limited than a method of finding a target point by analyzing the terrain and the surrounding environment of the target point and then finding the corresponding terrain environment on a map. Even in rainy days or foggy days, as long as the target point can be seen invisibly (the surrounding environment of the target point does not need to be analyzed), the coordinates of the target point can be obtained by using the rocket army command rule provided by the embodiment of the invention. The use process is convenient, and the device can be widely applied to the operation and teaching process of military topography. And this rocket army command chi for survey the surveying instrument of usefulness, small, light in weight, portable. If in special circumstances (such as damage or other circumstances) the mapper can be replaced to perform the mapping function.
Furthermore, if the position information of the standing point is directly positioned by using the Beidou handset, the coordinates of the target point can be obtained without a map. The method comprises the following steps of drawing a rectangular coordinate system on a piece of white paper, then returning the longitudinal axis or the transverse axis of the coordinate system to north by using a north arrow, positioning the coordinates of a standing point by using a Beidou handset, and marking the position of the standing point in the rectangular coordinate system. The same method of measuring the coordinates of the target points as described above is used to draw a straight line. And then, changing a standing point, positioning the coordinate of the standing point by using the Beidou handset, and correspondingly marking the position of the standing point in a rectangular coordinate system. And another straight line is drawn using the above-described "method of measuring coordinates of target points". The two standing points and the point where the two straight lines meet are connected into a triangle, the coordinates of the two points of the triangle are known, the degrees of each angle of the triangle are measured (the ruler body 1 has the function of a protractor), and the coordinates of the meeting point can be obtained. Therefore, under certain conditions, the coordinates of the target point can be mapped without depending on a map. Can be widely used in the operation and teaching process of military topography.
In some embodiments of the present invention, as shown in fig. 2, 3 and 4, one end of the suspension wire 4 is wound inside the automatic wire rewinding device 5. The automatic wire rewinding device 5 mainly includes a housing 51, a column 52, a spool disc 53, and a coil spring 54.
The housing 51 is fixed to the ruler body 1 by an optional adhesive. The post 52 is fixed at the center inside the housing 51 to facilitate the installation of the winding wheel disc 53. The winding wheel disc 53 is provided with a winding groove 532 on the peripheral surface, and the suspension wire 4 can be wound in the winding groove 532. The end surface of the winding wheel disc 53 is provided with a through hole 531 matched with the upright column 52. After the post 52 passes through the through hole 531, the winding wheel disc 53 can rotate around the post 52.
The end face of the winding wheel disc 53 is provided with a groove 533 of a certain depth, and the coil spring 54 is placed in the groove 533. One end of the coil spring 54 is fixedly connected to the pillar 52, and the other end of the coil spring 54 is fixedly connected to the sidewall of the groove 533.
In order to measure the suspension wire 4, a suspension wire part 6 is arranged on the edge of the ruler body 1 aligned with the center of the puncture hole 21, and the suspension wire part 6 is in an inverted triangle shape. Further, the distance between the position where the hanging wire part 6 is measured (i.e., the bottom of the left side or the right side) and the pricking hole 21 can be determined to be an accurate value, for example, 20 cm, which is convenient for calculation.
When the automatic winding device is used, the suspension wire 4 is pulled out from the outlet of the automatic winding device 5, the winding wheel disc 53 is driven to rotate clockwise, the coil spring 54 is gradually tightened in the clockwise rotation process of the winding wheel disc 53, and the suspension wire 4 is also gradually pulled out. Then, the suspension wire 4 is inserted from one of the left and right sides of the suspension wire part 6, passes through the lower part of the suspension wire part 6, and then is passed out from the other side. Because the left side and the right side of the inverted triangle-shaped suspension wire part 6 form an included angle with the ruler body 1, the passing suspension wire 4 can pass through the root part of the included angle. When the suspension wire 4 passes through the other side, one of the salient points 41 is clamped at the root of the included angle. When the suspension wire 4 is used for measurement, the suspension wire 4 is straightened, and a certain salient point 41 is clamped at the root of the included angle and just contacts with a map. After the measurement is finished, the suspension wire 4 is loosened, and the winding wheel disc 53 can automatically rotate to wind the suspension wire 4 again under the action of the coil spring 54, so that the use is very convenient.
The protruding point 41 may be a knotted knot of the suspension wire 4, or PP plastic particles adhered to the suspension wire 4. The salient points 41 are small in size, so that the ruler body 1 cannot be lifted even if the ruler is clamped at the V-shaped included angle, and the error is small.
In some embodiments of the present invention, as shown in fig. 2, the end of the suspension wire 4 away from the automatic wire rewinding device 5 is provided with a pull ring 42. The pull ring 42 can be passed through the finger during measurement, or the pull ring 42 is held by hand, so that the measurement is convenient.
In some embodiments of the invention, as shown in fig. 5 and 6, the above-mentioned needle 3 is composed of a handle 31, a cylinder 32 and a needle tip 33, wherein the handle 31 is easy to hold and apply force by hand. A handle 31 is fixed to one end of the cylinder 32 and a needle tip 33 is fixed to the other end of the cylinder 32. When the needle 3 is pricked on the drawing board, the end surface of the cylinder 32 can prevent the needle point 33 from further penetrating into the drawing board, and the use is very convenient. The cylinder 32 is matched with the needle pricking hole 21, namely when the needle 3 is inserted into the needle pricking hole 21, the cylinder 32 is matched with the needle pricking hole 21 to avoid gaps as much as possible, so that the possibility of shaking of the ruler body 1 is reduced, and the measuring error is reduced. Also, the ruler body 1 can be selected around the cylinder 32.
In order to store the puncture needle 3 conveniently, a puncture needle fixing device 7 is arranged on the ruler body 1. The needle inserting fixing device 7 consists of a needle cylinder 71 and a magnetic ring 72, the magnetic ring 72 is fixed inside the needle cylinder 71, and the needle cylinder 71 is fixed on the surface of the ruler body 1. The cylinder 32 of the needle 3 can be just put into the needle cylinder 71, the handle 31 is exposed to be convenient for taking out, and the needle point 33 can just penetrate through the magnetic ring 72. And the cylinder 32 is made of metal material, and the metal cylinder can be attracted by the magnetic ring 72, so that the puncture needle 3 can not fall out.
It should be noted that a plurality of the needle fixing devices 7 may be provided on one ruler body 1, and a plurality of the needles 3 may be correspondingly provided. The puncture needle 3 can be used for limiting the ruler body 1 and fixing a map on a drawing board.
In some embodiments of the present invention, the ruler body 1 is composed of two parts, namely, a first ruler body 11 and a second ruler body 12. Wherein, the first ruler body 11 is fixedly connected with a first hinge 8, and the second ruler body 12 is fixedly connected with a second hinge 9. The first hinge 8 and the second hinge 9 are structurally shown in fig. 7, and the first hinge 8 and the second hinge 9 are hinged with each other.
Through the hinged cooperation of the first hinge 8 and the second hinge 9, the first ruler body 11 and the second ruler body 12 can be opened when in use, and the first ruler body 11 and the second ruler body 12 can be folded when not in use. After being folded, the utility model is convenient to be directly put into the pocket and is very convenient to carry.
In some embodiments of the present invention, the suspension wire 4 includes a nylon suspension wire, which has high strength, is not easy to break, is wear-resistant, and has a long service life.
In some embodiments of the present invention, the ruler body 1 is provided with scale marks and auxiliary plotting die holes 13. The scale markings and the auxiliary plotting die holes 13 facilitate the measurement of the spread length, angle, etc. on the graph and facilitate the rapid plotting of commonly used labels. The function of commanding the operation on the auxiliary graph is achieved, and the method is very practical.
In summary, the embodiment of the invention provides a rocket military commander ruler, which comprises a ruler body 1, wherein the ruler body 1 is provided with a positioning part 2, the positioning part 2 is provided with a needle pricking hole 21, and the center of the needle pricking hole 21 is aligned with the edge of the ruler body 1. And the puncture needle also comprises a puncture needle 3 and a suspension wire 4, the puncture needle 3 is matched with the puncture needle hole 21, and salient points 41 are arranged on the suspension wire 4 at equal intervals. For completely explaining the technical scheme of the invention, the ruler also comprises a hanging wire part 6, an automatic wire rewinding device 5 and a puncture fixing device 7 which are arranged on the ruler body 1. And the ruler body 1 is also provided with a first hinge 8 and a second hinge 9 which are hinged with each other. The automatic wire take-up device 5 is convenient for winding the suspension wire 4, the needle fixing device 7 is convenient for storing the needle 3, and the use is very convenient. And first hinge 8 and second hinge 9 are convenient for fold first ruler body 11 and second ruler body 12, easily put into the pocket, make the rocket army command chi portable of this embodiment.
Therefore, compared with the traditional rocket military command ruler, the rocket military command ruler has the advantages of being capable of simply and quickly measuring the coordinates and the elevation of the target point, and meanwhile has the advantages of being suitable for popularization, convenient to carry and convenient to use.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A rocket military command ruler is characterized by comprising a ruler body, wherein the ruler body is provided with a positioning part, the positioning part is provided with a needle pricking hole, and the center of the needle pricking hole is aligned with the edge of the ruler body;
the novel needle is characterized by further comprising a needle and a suspension wire, wherein the needle is matched with the needle inserting hole, and salient points are arranged on the suspension wire at equal intervals.
2. A rocket force command ruler according to claim 1, wherein the suspension wire is arranged on an automatic take-up device, the automatic take-up device comprises a shell, a stand column and a winding wheel disc, the shell is arranged on the ruler body, the stand column is fixed inside the shell, winding grooves are arranged on the periphery of the winding wheel disc, a through hole is arranged on the end face of the winding wheel disc, and the through hole is matched with the stand column.
3. A rocket military commander ruler according to claim 2, wherein a groove is provided on an end surface of the wire winding wheel disc, a coil spring is provided in the groove, one end of the coil spring is fixedly connected with the upright post, and the other end of the coil spring is fixedly connected with a side wall of the groove.
4. A rocket military commander ruler according to claim 3, wherein edges of the ruler body and the needle insertion hole which are aligned at the center are provided with hanging wire portions, and the hanging wire portions are in an inverted triangular shape.
5. A rocket military commander according to claim 4, wherein a pull ring is provided at an end of the suspension wire remote from the automatic wire take-up device.
6. A rocket military commander ruler according to claim 5, wherein said needle comprises a handle, a cylinder and a needle point, said handle being fixed to one end of said cylinder, said needle point being fixed to the other end of said cylinder, said cylinder being adapted to said needle insertion hole.
7. A rocket military commander ruler according to claim 6, wherein said ruler body is provided with a needle fixing device, said needle fixing device comprises a needle cylinder and a magnetic ring, said magnetic ring is fixed in said needle cylinder, and said cylinder is a metal cylinder which can be attracted by said magnetic ring.
8. A rocket military commander ruler according to any one of claims 1 to 7, wherein said ruler body comprises a first ruler body and a second ruler body, said first ruler body being provided with a first hinge, said second ruler body being provided with a second hinge, said first hinge and said second hinge fitting.
9. A rocket military commander rule according to claim 8, wherein said suspension wires comprise nylon suspension wires, and the pitch of said raised points is 0.5 cm to 2 cm.
10. A rocket military commander ruler according to claim 9, wherein said ruler body is provided with scale markings and auxiliary plotting die holes.
CN202010444311.2A 2020-05-22 2020-05-22 Rocket army command ruler Active CN111561909B (en)

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US6178376B1 (en) * 1998-02-27 2001-01-23 Mlr Electronique Method and arrangement for recording and using geographic data
CN103307996A (en) * 2013-07-04 2013-09-18 合肥工业大学 Simple laser scanning device
CN106705932A (en) * 2016-12-14 2017-05-24 朱志亨 Outdoor comprehensive surveying and mapping device for military topography
RU2653586C1 (en) * 2017-04-17 2018-05-11 Алексей Сергеевич Шувалов Military protractor
CN110657789A (en) * 2018-06-29 2020-01-07 中国人民解放军陆军工程大学 Military quick reading combined tool for graph
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