Multifunctional fixed point compass

Abstract

The utility model relates to a multifunctional fixed-point compass which comprises a compass main body, a turning plate, a hasp clamp, a direction dividing disc, an aiming disc and a reflective mirror, the turning plate comprises an upper plate body and a lower plate body, the lower plate body is hinged to the end, away from the compass body, of the upper plate body, and the lower plate body can be folded and attached to the bottom face of the upper plate body. A coordinate ladder ruler is carved on the surface of the lower plate body; check contrast lines are carved on the surface of the upper plate body, a positioning pin is fixed on the bottom surface of the upper plate body, and the upper plate body and the lower plate body are connected and fixed through a hasp clamp; the direction dividing disc is sleeved on the shell of the compass main body; the aiming disc is rotatably arranged on the direction dividing disc in a sleeving manner, and a front sight and a sighting device are integrally arranged on the aiming disc; and two positioning lines are carved on the aiming disc. According to the utility model, the number of devices required in the measurement process is effectively reduced, measurement can be realized while walking, the devices do not need to be repeatedly prepared and withdrawn, and the convenience of carrying and transferring the devices and the efficiency and precision of measurement operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the compass, especially to a multifunctional fixed-point compass. BACKGROUND

[0002] In military topography, when analyzing terrain and planning routes by using topographic maps, the specific positions of the standing point and the target point on the topographic map must be determined first. At present, the standing point and the target point can be determined quickly by using electronic products, but the electronic products are high in cost, prone to failure and interference. In comparison, the use of simple equipment is low in cost, good in stability, and more universal and guaranteed. Therefore, learning to use simple equipment to determine the standing point and the target point is a skill that must be mastered by soldiers, and the compass is one of the commonly used tools for determining the standing point and the target point.

[0003] Determining the standing point and the target point means determining the specific position of the standing point in the field on the topographic map and the specific position of a target point on the topographic map. The methods for determining the standing point and the target point usually include the visual estimation method, the resection method, the intercept method, the magnetic azimuth intersection method, the polar distance method, and the fixed straight line method. Among them, the visual estimation method mainly determines the standing point and the target point by analyzing the obvious terrain in the field, and the other methods all need to draw one or more straight lines through the standing point on the topographic map to finally determine the standing point or the target point. The principle is that, on the basis that the direction of the map is completely consistent with the present field, the connecting line between the standing point and the target point in the field must be parallel to the connecting line between the standing point and the target point on the topographic map.

[0004] The core steps of the existing method for drawing a straight line through the standing point or the target point on the topographic map according to the compass are calibration of the map, aiming, and line drawing. The specific steps are usually as follows: 1. Fix the topographic map on the drawing board by using drawing pins or dovetail clamps; 2. Set up the drawing board support frame; 3. Place the drawing board on the drawing board support frame and keep it stable at all times; 4. Place the military compass on the topographic map with the front end of the sighting aperture pointing upwards; 5. Move the compass so that the straight edge is perpendicular to the magnetic meridian of the topographic map; 6. Keep the relative positions of the drawing board, the topographic map, and the compass unchanged and rotate the drawing board so that the north end of the magnetic needle of the compass is aligned with the index (the “0” division of the scale), at which time the direction of the map is consistent with the present field, i.e. the map calibration is completed; 7. Insert a thin needle vertically at the known standing point or target point on the topographic map; 8. Keep the thin needle vertical to the topographic map and rotate the ruler around the thin needle and aim at the target point in the field through the straight edge of the ruler; 9. Draw a direction line with a thin pencil along the straight edge of the ruler, and the direction line is the straight line through the standing point and the target point on the topographic map.

[0005] For the above prior art, the inventor believes that the existing auxiliary equipment required for determining the standing point and the target point according to the compass is too much, such as the graph board, the graph board support frame, the topographic map, the fine needle, the pencil and the like, and the volume is large, and the equipment is inconvenient to carry and transfer, and the operation process is complicated. Practical new type content

[0006] In order to solve the above technical problems, the utility model provides a kind of multifunctional fixed point compass, effectively reduce the equipment quantity required in determination process, can realize side walk side measurement, without repeatedly preparing and withdrawing equipment, improve the convenience of equipment carrying, transfer and the efficiency and accuracy of determination operation.

[0007] In order to realize the above purpose, the utility model provides a kind of multifunctional fixed point compass, including compass main part, and the compass main part center is equipped with magnetic needle for indicating geographical north;It further includes turnover board, buckle clamp, direction scale disc, sighting disc and reflector;

[0008] The turnover board includes upper plate body and lower plate body, the upper plate body is fixed to the bottom surface of compass main part, and the lower plate body is hinged to the end of upper plate body away from compass main part, and the lower plate body can be folded and attached to the bottom surface of upper plate body;

[0009] The surface of lower plate body is engraved with coordinate ladder scale;The surface of upper plate body is engraved with square grid contrast line, for comparing with coordinate vertical line and horizontal line;The bottom surface of upper plate body is fixed with positioning needle, and is located at the center position of compass main part, for marking known standing point or target point;When turnover board is folded, positioning needle is inserted into hollow circular hole in lower plate body;

[0010] The fixed end of buckle clamp is fixed to the side wall of upper plate body, and the movable end of buckle clamp is fixed to the side wall of lower plate body through hinge;Topographic map is clamped between upper plate body and lower plate body during fixed point measurement, and the upper plate body and the lower plate body are connected and fixed through buckle clamp;

[0011] The direction scale disc is sleeved on the shell of compass main part;The sighting disc is rotatably sleeved on the direction scale disc, and the sighting disc is integrally provided with foresight and collimation;Two positioning lines are engraved on the sighting disc, and the two positioning lines are located below the middle of collimation and foresight, for marking the position of standing point or target point on topographic map;

[0012] The reflector is fixed on foresight through hinge, for observing the positional relationship between magnetic needle and direction scale disc when aiming.

[0013] Further, the upper surface of sighting disc is toothed.

[0014] Further, the direction scale disc is provided with a scale disc fixer for fixing the direction scale disc after the angle between the direction scale disc and the square contrast line is determined.

[0015] Further, the ratio of the bead width to the distance from the bead to the sighting is 1:10.

[0016] Further, the reflector is made of one-way perspective material.

[0017] Further, the reflector is engraved with an aiming auxiliary line for assisting aiming.

[0018] Further,

[0019] The utility model discloses a multifunctional fixed-point compass.

[0020] The multifunctional fixed-point compass integrates and improves the equipment, reduces the number and volume of the equipment required for determining the standing point and target point, realizes walking and measuring simultaneously, does not need to repeatedly prepare and remove the equipment, and improves the convenience of carrying and transferring the equipment and the efficiency and precision of measurement operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure front view of the folding state of the folding plate in the utility model.

[0022] Figure 2 is the overall structure front view of the unfolded state of the folding plate in the utility model.

[0023] Figure 3 is the overall structure plan view of the unfolded state of the folding plate in the utility model.

[0024] Figure 4 is the front view in the use state of the utility model.

[0025] In the figure: 1, buckle clamp; 2, coordinate ladder scale; 3, square contrast line; 4, positioning needle; 5, direction scale disc; 6, scale disc fixer; 7, aiming disc; 8, bead; 9, sighting; 10, positioning line; 11, reflector; 12, aiming auxiliary line; 13, magnetic needle; 14, compass main body; 15, upper plate body; 16, lower plate body. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in connection with the drawings.

[0027] The utility model discloses a multifunctional fixed-point compass.

[0028] Reference Figures 1 to 3The utility model provides a multi -functional fixed point compass, which comprises a compass body 14, a magnetic needle 13 in the center of the compass body 14 for indicating geographical north, a flap, a buckle clamp 1, a direction scale 5, a sighting disc 7 and a reflector 11.

[0029] Referring to Figures 1 to 3 The flap comprises an upper plate body 15 and a lower plate body 16, the upper plate body 15 is fixed to the bottom surface of the compass body 14, the lower plate body 16 is hinged to one end of the upper plate body 15 away from the compass body 14, and the lower plate body 16 can be folded and attached to the bottom surface of the upper plate body 15.

[0030] Referring to Figures 1 to 3 The surface of the lower plate body 16 is engraved with a coordinate scale 2, which can be used as a ruler to draw a straight line between a standing point and a target point, or can be used alone to measure the coordinates on a map. The surface of the upper plate body 15 is engraved with a square contrast line 3 for comparison with the coordinate vertical line and horizontal line to determine the correct positional relationship between the compass and the topographic map. The bottom surface of the upper plate body 15 is fixed with a positioning needle 4 at the center of the compass body 14 for marking a known standing point or target point to determine the correct positional relationship between the compass and the topographic map. A hollow circular hole is formed in the middle of the lower plate body 16, and the positioning needle 4 is inserted into the hollow circular hole in the lower plate body 16 when the flap is folded.

[0031] Referring to Figures 1 to 3 The fixed end of the buckle clamp 1 is fixed to the side wall of the upper plate body 15, and the movable end of the buckle clamp 1 is fixed to the side wall of the lower plate body 16 through a hinge. When measuring the fixed point, the topographic map is clamped between the upper plate body 15 and the lower plate body 16, and the relative position of the topographic map and the compass is fixed by the buckle clamp 1.

[0032] The direction scale 5 is the same as the direction scale 5 of a common compass, and is sleeved on the outer shell of the compass body 14. By comparing the "0" scale with the magnetic meridian, the square contrast line 3 and the magnetic declination angle of the topographic map are marked together, and the direction scale 5 can also be used alone to determine the present position.

[0033] The direction scale 5 is integrally provided with a scale fixer 6, which is spring type and can be tightly attached to the outer shell of the compass body 14 by pressing inward like a brake pad. After the included angle between the direction scale 5 and the square contrast line 3 is determined, the scale fixer 6 can be used to fix the direction scale 5 to prevent accidental rotation.

[0034] Referring to Figures 1 to 3The sighting disc 7 is rotatably sleeved on the direction scale disc 5, and is used for fixing the position relationship of the foresight 8 and the sighting 9, and the eyes, the sighting 9, the foresight 8 and the present target point are in a straight line through rotation. The outer circle of the upper surface of the sighting disc 7 is toothed, facilitating rotation. The foresight 8 and the sighting 9 are integrally arranged on the sighting disc 7, the ratio of the width of the foresight 8 to the distance from the foresight 8 to the sighting 9 is 1:10, and the foresight 8 and the sighting 9 are used for aiming at the present target point and estimating the actual distance. Two positioning lines 10 are drawn on the sighting disc 7, and the two positioning lines 10 are divided into being located below the middle of the sighting 9 and the foresight 8, and are used for marking the position of the standing point or the target point on the topographic map.

[0035] Referring to Figure 3 and Figure 4 The reflector 11 is cover-shaped, is fixed on the foresight 8 through a hinge, and is used for observing the position relationship between the magnetic needle 13 and the direction scale disc 5 during aiming. The reflector 11 is made of one-way perspective material; the inside can be seen from the outside, and the outside is reflected (except for the local area where the aiming auxiliary line 12 is located), and is used for observing the position relationship between the magnetic needle 13 and the direction scale disc 5 during aiming. The reflector 11 is drawn with the aiming auxiliary line 12, and is used for assisting aiming when the present target point is too high.

[0036] The multifunctional fixed-point compass of the embodiment is mainly suitable for determining standing points and target points on commonly used military topographic maps with a scale of 1:50000 or 1:25000, and can also be used alone as a coordinate scale 2, a compass and other equipment suitable for map measurement, map marching, directional cross-country and other operations. Main functions include: 1. measuring the distance on the map; 2. measuring the coordinates on the map; 3. determining the present position; 4. estimating the actual distance; 5. cooperating with the topographic map and a pencil to complete the marking of a straight line passing through the standing point and the target point on the topographic map.

[0037] The working principle of the multifunctional fixed-point compass is as follows: the magnetic declination angle of each topographic map is fixed, the direction scale disc 5 is adjusted according to the magnetic declination angle of the topographic map, the angle between the “0” scale and the longitudinal line of the grid reference line 3 is consistent with the magnetic declination angle, the relative position of the compass and the topographic map is fixed, and the grid reference line 3 is coincident or parallel with any coordinate longitudinal line or horizontal line on the topographic map, so that the topographic map is in the calibration state when the magnetic needle 13 points to the “0” scale. The positioning needle 4 is fixed on the known target point (or standing point), the sighting disc 7 is rotated, the sighting 9, the foresight 8 and the reflector 11 are observed at the same time, the sighting 9, the foresight 8 and the present target point are ensured to be on the same straight line, and the magnetic needle 13 points to the “0” scale, so that the straight line through the point position on the map indicated by the positioning line 10 and the point position on the map fixed by the positioning needle 4 at the same time is the direction line of the standing point (or target point).

[0038] The specific use method steps (taking the determination of the standing point as an example) are as follows:

[0039] Step 1. Place the compass on the unfolded topographic map, align the grid line 3 with any coordinate vertical or horizontal line and the "0" mark of the direction scale 5 with the magnetic meridian, and fix the direction scale 5 through the scale holder 6.

[0040] Step 2. Fold the topographic map to a size that can be held by one hand and the standing point and the target point are both displayed.

[0041] Step 3. Fix the positioning needle 4 on the topographic map at the position of the known target point, rotate the compass so that the grid line 3 is aligned or parallel with any coordinate vertical or horizontal line near the target point, and fix the relative position of the compass body 14 and the topographic map by clamping the buckle clamp 1.

[0042] Step 4. Open the mirror 11, rotate the topographic map with one hand and rotate the sighting disc 7 with the other hand, and observe the sighting 9, the foresight 8 and the mirror 11 at the same time, so that the sighting 9, the foresight 8 and the target point on the spot are in a line, and the magnetic needle 13 points to the "0" mark, and mark a point on the positioning line 10 with a pencil.

[0043] Step 5. Take the compass off the topographic map, and draw a straight line with a pencil through the marked point and the known target point, and the straight line is the result.

[0044] The present application effectively improves the convenience of carrying and transferring equipment, and the efficiency and accuracy of operation. Through the integration of equipment and the improvement of methods, the equipment required for determining the standing point and the target point by using the compass of the present application is reduced from the traditional 10 kinds to 3 kinds (the compass of the present application, the topographic map and the pencil), the volume is reduced from about 7000 cm 3 to about 150 cm 3 , and the walking and measuring can be realized without repeated preparation and recovery of equipment.

[0045] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A multi-functional pointing compass, comprising a compass body (14) with a magnetic needle (13) in the center of the compass body (14) for indicating geographical north; characterized in that: It also comprises a flap, a buckle clip (1), a direction scale (5), a sighting disc (7) and a mirror (11). The flap comprises an upper plate body (15) and a lower plate body (16), the upper plate body (15) is fixed to the bottom surface of the main body (14) of the compass, the lower plate body (16) is hinged to one end of the upper plate body (15) away from the main body (14) of the compass, and the lower plate body (16) can be folded and attached to the bottom surface of the upper plate body (15). The surface of the lower plate body (16) is engraved with a coordinate scale (2); the surface of the upper plate body (15) is engraved with a square grid reference line (3) for comparison with the coordinate vertical and horizontal lines; the bottom surface of the upper plate body (15) is fixed with a positioning needle (4) at the center of the main body (14) of the compass for marking a known standing point or target point; when the flap is folded, the positioning needle (4) is inserted into the hollow circular hole in the lower plate body (16). The fixed end of the buckle clip (1) is fixed to the side wall of the upper plate body (15), and the movable end of the buckle clip (1) is fixed to the side wall of the lower plate body (16) through a hinge; when point measurement is performed, the topographic map is clamped between the upper plate body (15) and the lower plate body (16), and the upper plate body (15) and the lower plate body (16) are connected and fixed through the buckle clip (1). The direction scale (5) is sleeved on the outer shell of the main body (14) of the compass; the sighting disc (7) is rotatably sleeved on the direction scale (5), and the sighting disc (7) is integrally provided with a foresight (8) and a sighting (9); two positioning lines (10) are engraved on the sighting disc (7), and the two positioning lines (10) are located below the middle of the sighting (9) and the foresight (8) to mark the position of the standing point or target point on the topographic map. The mirror (11) is fixed to the foresight (8) through a hinge for observing the positional relationship between the magnetic needle (13) and the direction scale (5) during aiming.

2. A multi-function point-and-needle compass according to claim 1, wherein: The upper surface of the direction scale (5) is toothed.

3. The multi-functional point-and-compass according to claim 1, wherein: The direction scale (5) is provided with a scale fixer (6) for fixing the direction scale (5) after the included angle between the direction scale (5) and the square grid reference line (3) is determined.

4. The multi-functional point-and-compass of claim 1, wherein: The ratio of the width of the foresight (8) to the distance from the foresight (8) to the sighting (9) is 1:

10.

5. A multi-function point-and-needle compass according to any one of claims 1-4, characterized in that: The mirror (11) is made of one-way perspective material.

6. A multi-function point-and-needle compass according to claim 5, wherein: The mirror (11) is engraved with a sighting auxiliary line (12) for assisting aiming.

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