CN205607373U - Sextant convenient to operation - Google Patents

Abstract

An easy-to-operate sextant, including a disc body, a moving mirror, a fixed mirror, a telescope and a swing arm, and also includes a mounting shell, a bracket, a first reflector and a second reflector, and the mount is hemispherical with the port facing upwards The shell, the dial of the disc body faces down and is vertically installed in the installation shell, and the side wall of the installation shell is provided with a through hole for the exposure of the fixed mirror; the installation shell always keeps the port parallel to the sea level through a rotating mechanism Installed on the bracket; the first reflector and the second reflector are both arranged on the disk body, the first reflector is used to receive the light reflected by the fixed mirror and reflect it to the second reflector, the telescope is arranged on the mounting shell and Can receive the light reflected by the second mirror. The installation shell and the bracket cooperate to keep the observation surface of the sextant at the level of the sea level, which improves the horizontal stability of the sextant; the first reflector, the second reflector cooperate with the moving mirror and the fixed mirror to make the light reflected Located above the installation shell, it is convenient for the telescope to observe it, and it is convenient to use.

Description

Easy-to-use sextant

technical field

The utility model relates to the technical field of a sextant for navigation, in particular to an easy-to-operate sextant.

Background technique

The sextant is an optical instrument commonly used in the field of navigation to measure the angle between two distant targets. It is mainly used to measure the angle between the sun or other celestial bodies and the sea level or horizon at a certain moment, so as to quickly know the position of the ship. latitude and longitude.

When a ship sails in the ocean, it often encounters strong winds and waves, and the pitching of the ship will cause large heel and trim angles. Under such sea conditions, it is inconvenient to use a conventional sextant to measure the sun's altitude angle, and it is easy to cause large errors. At the same time, because the existing sextant is generally used directly in the hand, the metal sextant is relatively heavy, and after holding it for a certain period of time, there will be a slight position shift due to the acidity of the hand, resulting in a relatively stable sextant. Poor, affect the measurement accuracy. In order to solve this problem, the Chinese invention patent application "A Dial for Sextant" (Application No.: 201210194410.5) with application publication number CN103487020A discloses a structure, which has a disc body, and the disc body is integrally formed The fan-shaped structure, the disc surface of the disc body has six adjacent special-shaped holes, and a scale display disc is provided on the outer edge of the disc body. The dial with the above structure utilizes six adjacent special-shaped holes to reduce the weight of the sextant dial, thereby improving the stability of the sextant to a certain extent. Then, it will still affect the stability due to the turbulence of the sea, which cannot fundamentally solve the problem.

Therefore, for present sextant, wait to do further improvement.

Utility model content

The technical problem to be solved by the utility model is to provide an easy-to-operate sextant for the above-mentioned technical situation.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: an easy-to-operate sextant, including a disc body, a moving mirror, a fixed mirror, a telescope and a swing arm, and a dial is arranged on the edge of the disc body, so Both the moving mirror and the fixed mirror are arranged on the disk body, one end of the swing arm is rotatably arranged on the upper surface of the disk body through the first connecting shaft and one end is connected with the lower end of the moving mirror, and it is characterized in that: it also includes a mounting shell , a bracket, a first reflector and a second reflector, the installation shell is a hemispherical shell with the port facing upwards, the dial of the disc body faces downward and is vertically arranged in the installation shell, and the installation shell There is a through hole for the fixed mirror to be exposed on the side wall; the installation shell is installed on the bracket to keep the port parallel to the sea level through a rotating mechanism; the first reflector and the second reflector are both arranged on the disk On the body, the first mirror is used to receive the light reflected by the fixed mirror and reflect it to the second mirror, and the telescope is arranged on the installation shell and can receive the light reflected by the second mirror; The capacitive scale on the disc body, the capacitive scale comprises a scale body and a vernier, one end of the scale body is connected to the free end of the swing arm through a second connecting shaft, and the vernier is connected to the disc body through a third connecting shaft , the first connecting axis, the fixed mirror and the third connecting axis are on a straight line, and the distance between the first connecting axis and the second connecting axis is equal to the distance between the first connecting axis and the third connecting axis distance.

As a further improvement of the utility model, the rotating mechanism includes a mounting ring, a horizontal shaft, and a vertical shaft. There is a first shaft hole matching the horizontal axis on the side wall; the two longitudinal shafts are symmetrically arranged on the outer peripheral surface of the mounting ring, and correspondingly, the top of the bracket is equipped with Matching secondary shaft bore. The above-mentioned horizontal axis and the vertical axis are perpendicular to each other. With the above-mentioned structure, no matter how rough the ship is, the installation shell can automatically keep the top plane parallel to the sea level through the rotation of the horizontal axis and the vertical axis, so that the measuring plane of the sextant is always kept horizontal , with better horizontal stability.

In order to facilitate the connection, the top of the bracket has an assembly ring arranged in a circumferential direction, and the second shaft hole is opened on the assembly ring. When the assembly is completed, the installation ring is sleeved in the assembly ring. The assembly ring is arranged on the bracket so that it can rotate in the circumferential direction. By adopting the above structure, the angle of the disc body can be adjusted as required, which is convenient for use.

Preferably, the outer peripheral surface of the assembly ring has protruding rings arranged in the circumferential direction, and correspondingly, the bracket is provided with grooves for guiding cooperation with the protruding rings. This structure provides convenience for the angle adjustment of the disc body.

In each of the above solutions, the first reflective mirror is arranged on the disc body on the right side of the fixed mirror, and the second reflective mirror is arranged on the right side of the moving mirror and is arranged close to the moving mirror. With such a structure, it is convenient for the light to enter the field of view of the telescope on the outside of the top of the installation shell after multiple reflections.

In order to facilitate the connection, at least two downwardly extending insertion posts are provided at the bottom of the dial of the disc body, and correspondingly, the inner bottom of the installation shell has an upwardly arranged socket that matches the insertion posts. The above-mentioned plug-in post and socket can be connected in a detachable manner, so that the disk body and other components can be taken out and stored after use.

Preferably, an adjustment handle is connected to the top of the swing arm, and the installation shell is a transparent shell. This structure provides convenience for the adjustment of the moving mirror and facilitates the observation of the dial located in the installation case.

Compared with the prior art, the utility model has the advantages that: the utility model is provided with a mounting shell, a bracket, a first reflector and a second reflector on the basis of the existing sextant, and the position of the telescope is adjusted. Changes, among them, the installation shell cooperates with the bracket to keep the observation surface of the sextant at the level of the sea level, which improves the horizontal stability of the sextant; the first reflector and the second reflector cooperate with the moving mirror and the fixed mirror, After the light is reflected four times, it is located above the installation shell, which is convenient for the telescope to observe it and is easy to use; at the same time, with the support of the bracket, there is no need to hold the sextant, which avoids the problem of being unstable for long-term use; in addition, the setting Electronic readings can be performed behind the capacitive scale, which is more accurate and avoids errors in manual reading.

Description of drawings

Fig. 1 is the partial structural representation of the utility model embodiment;

Fig. 2 is a structural schematic diagram of the hidden bracket, mounting ring and mounting sleeve in Fig. 1;

Fig. 3 is the schematic diagram of the enlarged structure of part A in Fig. 1;

FIG. 4 is a schematic diagram of the assembly structure of the installation ring and the assembly ring in FIG. 1 .

detailed description

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the easy-to-operate sextant of this embodiment includes a disc body 1, a moving mirror 2, a fixed mirror 3, a telescope 4, a swing arm 5, a mounting case 6, a bracket 7, and a first reflective mirror 8 And the second mirror 9, the edge of the disc body 1 is provided with a dial 11, the moving mirror 2 and the fixed mirror 3 are all located on the disc body 1, the setting positions of the moving mirror 2 and the fixed mirror 3 are the same as those of the existing sextant Similarly, one end of the swing arm 5 is rotatably provided on the upper surface of the disc body 1 through the first connecting shaft 100 and one end is connected to the lower end of the moving mirror 2 . An adjustment handle 51 can be provided on the top of the swing arm 5 for easy adjustment.

The installation shell 6 in this embodiment is a hemispherical shell with the port facing upwards, and the dial 11 of the disc body 1 faces downward and is vertically arranged in the installation shell 6. The installation shell 6 can be made of transparent materials, so as to facilitate alignment and installation. The dial 11 inside the housing 6 is observed. The bottom of the dial 11 of the disc body 1 is provided with four downwardly extending insertion columns 12 at intervals. Correspondingly, the bottom inner side of the installation shell 6 has an upwardly arranged socket 61 that matches the insertion columns 12. In this embodiment The plug post 12 in the socket is connected with the plug sleeve 61 in a detachable manner, and the disk body 1 and other parts can be taken out and stored after use. The upper part of the fixed mirror 3 is a lens for observing the sea level, and the lower part of the fixed mirror 3 is a plane mirror, which receives the light reflected by the moving mirror 2 and reflects it out. The side wall of the installation shell 6 is provided with a through hole 62 exposed for the fixed mirror 3, so as to observe the sea level.

The installation shell 6 is installed on the bracket 7 through a rotating mechanism 60 to keep the port parallel to the sea level all the time. Specifically, the rotating mechanism 60 includes a mounting ring 601, a horizontal shaft 602, and a vertical shaft 603. The horizontal shafts 602 are two and are respectively symmetrically arranged on the outer peripheral surface of the upper part of the mounting shell 6. Correspondingly, the side wall of the mounting ring 601 is opened. There is a first shaft hole 604 matching the transverse shaft 602 . There are two longitudinal axes 603 and they are respectively arranged symmetrically on the outer peripheral surface of the mounting ring 601, and the longitudinal axes 603 are perpendicular to the transverse axis 602. Correspondingly, the top of the bracket 7 is provided with a second axis hole 605 matching the longitudinal axes 603 . Specifically, the top of the bracket 7 has a circumferentially arranged assembly ring 71 , and the assembly ring 71 is provided on the bracket 7 so as to be able to rotate in a circumferential direction. The outer peripheral surface of the assembly ring 71 has a protruding ring 711 arranged along the circumferential direction. Correspondingly, the bracket 7 is provided with a groove 72 that guides and cooperates with the protruding ring 711, so as to adjust the angle of the disc body 1 as required. The second shaft hole 605 is opened on the assembly ring 71 , and the installation ring 601 is nested in the assembly ring 71 when the assembly is completed. With the above structure, no matter how bumpy the ship is, the installation shell 6 can automatically keep the top plane parallel to the sea level through the rotation of the horizontal axis 602 and the vertical axis 603, so that the sextant has better horizontal stability.

In this embodiment, the first reflective mirror 8 and the second reflective mirror 9 are provided to make the light reflect out of the mounting case 6 after passing through the fixed mirror 3 , so that the telescope 4 can observe it. Specifically, the first reflective mirror 8 and the second reflective mirror 9 are both arranged on the disk body 1, the first reflective mirror 8 is located on the right side of the fixed mirror 3, and the second reflective mirror 9 is located on the right side of the moving mirror 2 and is close to the moving mirror 2. layout. The first reflector 8 is used to receive the light reflected by the fixed mirror 3 and reflect it to the second reflector 9, and the second reflector 9 reflects the light again, and the telescope 4 is arranged on the top edge of the mounting shell 6 and can The light reflected by the second mirror 9 is received, the light is parallel to the observation plane and can be observed through the telescope 4 arranged on the top edge of the installation shell 6 .

In this embodiment, a capacitive scale 10 is provided on the disc body 1, and the capacitive scale 10 includes a scale body 101 and a vernier 102. One end of the scale body 101 is connected to the free end of the swing arm 5 through a second connecting shaft 200, The vernier 102 is connected to the disc body 1 through the third connecting shaft 300 , the first connecting shaft 100 , the fixed mirror 3 and the third connecting shaft 300 are on a straight line, and the distance between the first connecting shaft 100 and the second connecting shaft 200 is The distance is equal to the distance between the first connecting axis 100 and the third connecting axis 300 . With such a structure, it is convenient for electronic reading, which is more intuitive and accurate.

When using the sextant of this embodiment, the rotating mechanism 60 always keeps the observation plane of the sextant parallel to the sea level, which ensures that the sextant has better horizontal stability and avoids the impact of sea waves on the test results; The angle of the moving mirror 2 can be adjusted by twisting the swing arm 5, so that the moving mirror 2 searches and receives the light source. 3 The upper lens can observe the position of the sea level, and the plane mirror reflects the relative position of the light source and the sea level to the first reflector 8, and the first reflector 8 reflects the mirror image to the second reflector 9, The second reflective mirror 9 reflects it, and the operator can observe through the telescope 4, and continue to adjust the swing arm 5 so that the light source reflected on the plane mirror is tangent to the sea level. latitude and longitude calculations.

Claims (8)

1. A sextant that is easy to operate, comprising a disc body (1), a moving mirror (2), a fixed mirror (3), a telescope (4) and a swing arm (5), the edge of the disc body (1) A dial (11) is provided, the moving mirror (2) and the fixed mirror (3) are both arranged on the disc body (1), and one end of the swing arm (5) is rotatable through the first connecting shaft (100). Set on the upper surface of the disc body (1) and connected at one end to the lower end of the moving mirror (2), it is characterized in that it also includes a mounting shell (6), a bracket (7), a first reflector (8) and a second reflector Mirror (9), the installation shell (6) is a hemispherical shell with the port facing upwards, the dial (11) of the disc body (1) faces downward and is vertically arranged in the installation shell (6), and The side wall of the installation shell (6) is provided with a through hole (62) for the exposed mirror; the installation shell (6) is installed on the support ( 7) above; the first reflective mirror (8) and the second reflective mirror (9) are both arranged on the disc body (1), and the first reflective mirror (8) is used to receive the reflected light from the fixed mirror (3) light and reflect it to the second reflector (9), the telescope (4) is arranged on the installation shell (6) and can receive the light reflected by the second reflector (9); ) on the capacitance scale (10), the capacitance scale (10) includes a scale body (101) and a vernier (102), and one end of the scale body (101) is connected to the swing arm ( 5) is connected to the free end, the vernier (102) is connected to the disc body (1) through the third connecting shaft (300), the first connecting shaft (100), the fixed mirror (3) and the third connecting shaft The axes (300) are on a straight line, and the distance between the first connection axis (100) and the second connection axis (200) is equal to the distance between the first connection axis (100) and the third connection axis (300). distance. 2. The easy-to-operate sextant according to claim 1, characterized in that: the rotating mechanism (60) includes a mounting ring (601), a horizontal axis (602), and a vertical axis (603), and the horizontal axis (603) There are two shafts (602) and they are symmetrically arranged on the outer peripheral surface of the upper part of the installation shell (6). Correspondingly, the side wall of the installation ring (601) is provided with a first shaft holes (604); the longitudinal shafts (603) are two and are symmetrically arranged on the outer peripheral surface of the mounting ring (601), correspondingly, the top of the bracket (7) is provided with the longitudinal shaft (603) Matching secondary shaft hole (605). 3. The easy-to-operate sextant according to claim 2, characterized in that: the top of the bracket (7) has an assembly ring (71) arranged in a circumferential direction, and the second shaft hole (605) is opened in On the assembly ring (71), when the assembly is completed, the installation ring (601) is sleeved in the assembly ring (71). 4. The easy-to-operate sextant according to claim 3, characterized in that: the assembly ring (71) is provided on the bracket (7) so that it can rotate in a circumferential direction. 5. The easy-to-operate sextant according to claim 4, characterized in that: the outer peripheral surface of the assembly ring (71) has a protruding ring (711) arranged in the circumferential direction, and correspondingly, the bracket ( 7) A groove (72) that guides and cooperates with the protruding ring (711) is provided on the top. 6. The easy-to-operate sextant according to any one of claims 1 to 5, characterized in that: the first reflector (8) is arranged on the disc body (1) on the right side of the fixed mirror (3) ), the second mirror (9) is located on the right side of the moving mirror (2) and arranged close to the moving mirror (2). 7. The easy-to-operate sextant according to any one of claims 1-5, characterized in that: the bottom of the dial (11) of the disc body (1) is provided with at least two downward extending Corresponding to the insertion post (12), the bottom inner side of the installation shell (6) has a socket (61) arranged upwards and matched with the insertion post (12). 8. The easy-to-operate sextant according to any one of claims 1-5, characterized in that: an adjustment handle (51) is connected to the top of the swing arm (5), and the installation shell (6) It is a transparent shell.