Portable detachable sextant science teaching aid

Abstract

The utility model discloses a portable detachable sextant science teaching aid belongs to sextant technical field. This kind of novel sextant, folding mechanism includes annular seat, the front of annular seat is connected with installation box, the front center of installation box is installed with the I -section seat, is established in a pair of rotary grooves in the inside of I -section seat, and the inside of a pair of rotary grooves is rotatably connected with first connecting seat and second connecting seat respectively, and the opposite end of first connecting seat and second connecting seat is connected with first frame and second frame respectively, and the inside rotatable connection of installation box has a pair of pivot, and the one end of a pair of pivot all penetrates I -section seat, and is connected with first connecting seat and second connecting seat respectively, and the outside of a pair of pivot all is equipped with worm wheel, and the opposite side of two worm wheels all transmission is connected with worm, and the both ends of two worm are connected with the inner wall of installation box through bearing respectively, and the bottom end of two worm penetrates installation box and extends to the outside, and is all equipped with knob.

Description

Technical Field

[0001] This utility model relates to the field of sextant technology, specifically a portable, detachable sextant scientific teaching tool. Background Technology

[0002] A sextant is an optical instrument used to measure the angle between two distant targets. It has a fan-shaped shape, with its scale arc representing one-sixth of a circle. It consists of a small telescope, a fixed, semi-transparent, semi-reflective plane mirror (horizontal mirror), and a movable reflecting mirror connected to an index (index mirror). Sextants are typically used to measure the angle between the sun or other celestial bodies and the sea or horizon at a given moment, allowing for the rapid determination of the latitude and longitude of ships or aircraft.

[0003] Based on the above, the inventors have discovered the following problems: the current sextant's fan-shaped frame is an integral structure that cannot be folded, resulting in the sextant taking up a lot of space and being inconvenient to store, thus making the sextant inconvenient to carry.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a portable and detachable sextant scientific teaching tool in order to achieve a more practical value. Utility Model Content

[0005] The purpose of this utility model is to provide a portable, detachable sextant scientific teaching tool to solve the problem mentioned in the background art that the sextant's fan-shaped frame is an integral structure that cannot be folded, resulting in the sextant taking up a lot of space and being inconvenient to store.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A portable, detachable sextant scientific teaching aid, the folding mechanism including a ring base, a mounting box connected to the front of the ring base, an I-shaped base mounted at the center of the front of the mounting box, a pair of rotating grooves inside the I-shaped base, a first connecting seat and a second connecting seat rotatably connected inside the pair of rotating grooves respectively, a first frame and a second frame respectively connected to opposite ends of the first connecting seat and the second connecting seat, a pair of rotating shafts rotatably connected inside the mounting box, one end of each pair of rotating shafts penetrating the I-shaped base and connected to the first connecting seat and the second connecting seat respectively, worm gears sleeved on the outside of each pair of rotating shafts, worms drivingly connected to opposite sides of the two worm gears, the two ends of the two worms respectively connected to the inner wall of the mounting box via bearings, and the bottom ends of the two worms extending through the mounting box to the outside, each sleeved with a knob.

[0008] Furthermore, several grooves are equally spaced on the outer sides of both knobs.

[0009] The beneficial effect of adopting the above-mentioned further solution is that by opening several grooves on the outside of the knob, the friction between the knob and the operator's fingers is increased, thereby making it easier to turn the knob and preventing slippage.

[0010] Furthermore, an arc-shaped plate is provided between the front sides of the first frame and the second frame. The back side of the arc-shaped plate is in clearance fit with the front sides of the first frame and the second frame. The upper end surface of the arc-shaped plate is provided with scale lines. A pair of limiting grooves are provided inside the arc-shaped plate. Each pair of limiting grooves is provided with a limiting rod. The ends of the pair of limiting rods away from the inside of the arc-shaped plate are respectively connected to the front sides of the first frame and the second frame.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, by setting an arc-shaped plate on the front of the first frame and the second frame, when the first frame and the second frame need to be folded and stored, the arc-shaped plate is first pulled outward to separate the limiting groove and the limiting rod in the arc-shaped plate, so as to facilitate the subsequent folding of the first frame and the second frame.

[0012] Furthermore, the upper surface of the annular base is provided with a pointer assembly, which includes a pointer mirror base disposed inside the annular base. The bottom end of the pointer mirror base is connected to a limiting block, the upper end of which is in contact with the bottom surface of the annular base. The upper end of the pointer mirror base extends to the outside of the annular base and is fitted with a pointer arm. The inner wall of the end of the pointer arm away from the pointer mirror base is in clearance fit with the outer wall of the arc plate. The upper end of the pointer mirror base is provided with a square groove, and the pointer mirror body is inserted into the square groove.

[0013] The beneficial effect of adopting the above-mentioned further solution is that by setting a pointer assembly for measuring the angle between a celestial body and the horizon, the pointer mirror base is set inside the annular seat, and the bottom end of the pointer mirror base is connected to a limiting block. The upper end is fitted with a pointer arm, and the pointer mirror body is connected to the pointer arm by a first bolt, thereby limiting one end of the pointer arm. When the pointer arm rotates, it facilitates the rotation of the pointer mirror body. At this time, the end of the pointer arm away from the pointer mirror body moves at the arc plate.

[0014] Furthermore, the pointer mirror body is provided with a pair of first threaded holes, and the top surface of the pointer mirror base is provided with a pair of second threaded holes. A first bolt is threadedly connected between the opposing first threaded holes and second threaded holes.

[0015] The beneficial effect of adopting the above-mentioned further solution is that when it is necessary to disassemble the pointer assembly, first unscrew the first bolt, pull the pointer mirror body upward to separate it from the square slot, and complete the separation of the pointer mirror body, pointer mirror base and pointer arm.

[0016] Furthermore, a telescope assembly is provided on one side of the upper end face of the second frame. The telescope assembly includes a telescope bracket. The bottom end of the telescope bracket passes through the second frame and is fitted with a through hole in the second frame. The telescope body is connected inside the telescope bracket.

[0017] The beneficial effect of adopting the above-mentioned further solution is that by setting up a telescope assembly for observing the target, it is possible to accurately measure the angle between the target and the horizon or sea level. Since the bottom end of the telescope bracket passes through the second frame and is fitted with the through hole of the second frame, when the sextant needs to be folded and stored, the telescope bracket can be pulled upwards directly to separate the second frame and the telescope assembly.

[0018] Furthermore, a split mirror is provided on one side of the upper end face of the first frame, and the bottom end of the split mirror penetrates through the first frame and is gap-fitted with the through hole of the first frame.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting up a bipartite mirror, it can be used as a horizon mirror to help the operator measure the angle between two distant targets. At the same time, the bottom end of the bipartite mirror passes through the first frame and is fitted with the through hole of the first frame. When the sextant needs to be folded and stored, the bipartite mirror can be pulled upwards directly to separate the first frame and the bipartite mirror.

[0020] Furthermore, the bottom ends of the first frame and the second frame are provided with support components, the support components include support seats, the upper end of the support seats is provided with a pair of third threaded holes, the bottom ends of the first frame and the second frame are provided with fourth threaded holes near the third threaded holes, and the third threaded holes and the fourth threaded holes are threadedly connected by a second bolt.

[0021] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperation of the third threaded hole, the fourth threaded hole, and the second bolt, it is convenient to disassemble the support base, the first frame, and the second frame when the second bolt is unscrewed. Compared with the prior art, the beneficial effect of this utility model is that: this new sextant, by rotating two knobs respectively, causes two worm gears to rotate, which in turn drives two worm wheels to rotate, thereby realizing the rotation of two rotating shafts. When a pair of rotating shafts rotate in both directions, the first connecting seat and the second connecting seat connected to the pair of rotating shafts will rotate in both directions within the rotating groove of the I-shaped base, thereby realizing the rotation of the first frame and the second frame, so that the first frame and the second frame slowly rotate from the original horizontal state to the vertical state, thereby achieving the purpose of folding, so as to facilitate subsequent carrying or storage. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of a portable, detachable sextant scientific teaching aid provided by this utility model;

[0023] Figure 2 An exploded three-dimensional structural diagram of the pointer assembly of a portable detachable sextant scientific teaching tool provided by this utility model;

[0024] Figure 3 An exploded three-dimensional structural diagram of the folding mechanism of a portable detachable sextant scientific teaching tool provided by this utility model;

[0025] Figure 4 An exploded three-dimensional structural diagram of the mounting box for a portable, detachable sextant scientific teaching aid provided by this utility model;

[0026] Figure 5 An exploded three-dimensional structural diagram of the support component of a portable, detachable sextant scientific teaching tool provided by this utility model.

[0027] In the diagram: 100, Folding mechanism; 1001, Ring seat; 1002, Mounting box; 1003, I-shaped seat; 1004, Rotating groove; 1005, First connecting seat; 1006, Second connecting seat; 1007, First frame; 1008, Second frame; 1009, Rotating shaft; 1010, Worm gear; 1011, Worm; 1012, Knob; 1013, Groove; 1014, Arc plate; 1015, Limiting rod; 2 00. Pointer assembly; 2001. Pointer mirror base; 2002. Pointer arm; 2003. Pointer mirror body; 2004. First threaded hole; 2005. Second threaded hole; 2006. First bolt; 300. Telescope assembly; 3001. Telescope bracket; 3002. Telescope body; 400. Dividing mirror; 500. Support assembly; 5001. Support base; 5002. Third threaded hole; 5003. Second bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-5This utility model provides a technical solution: a portable detachable sextant scientific teaching aid. The folding mechanism 100 includes an annular seat 1001. A mounting box 1002 is connected to the front of the annular seat 1001. A I-shaped seat 1003 is installed at the center of the front of the mounting box 1002. A pair of rotating grooves 1004 are opened inside the I-shaped seat 1003. A first connecting seat 1005 and a second connecting seat 1006 are rotatably connected inside the pair of rotating grooves 1004. A first frame 1007 and a second frame 1008 are connected to opposite ends of the first connecting seat 1005 and the second connecting seat 1006, respectively. A pair of rotating shafts 1009 are rotatably connected inside the mounting box 1002. One end of each of the two rotating shafts 1009 passes through the I-shaped seat 1003 and is connected to the first connecting seat 1005 and the second connecting seat 1006, respectively. Worm gears 1010 are fitted on the outside of each of the two rotating shafts 1009. On opposite sides of each of the 10 sections, a worm gear 1011 is connected to the inner wall of the mounting box 1002 via bearings at both ends. The bottom ends of the two worm gears 1011 extend through the mounting box 1002 to the outside and are each fitted with a knob 1012. By rotating the two knobs 1012, the two worm gears 1011 rotate, which in turn drives the two worm wheels 1010 to rotate, thus rotating the two shafts 1009. When the pair of shafts 1009 rotate in both directions, the first connecting seat 1005 and the second connecting seat 1006 connected to the pair of shafts 1009 rotate in both directions within the rotating groove 1004 of the I-shaped seat 1003. This, in turn, causes the first frame 1007 and the second frame 1008 to rotate in both directions, gradually turning from their original horizontal state to a vertical state, thereby achieving the purpose of folding for easy carrying or storage.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-5This utility model provides a technical solution: Two knobs 1012 have several equally spaced grooves 1013 on their outer sides; an arc-shaped plate 1014 is provided between the front sides of the first frame 1007 and the second frame 1008; the back side of the arc-shaped plate 1014 is in clearance fit with the front sides of the first frame 1007 and the second frame 1008; and the upper surface of the arc-shaped plate 1014 has scale lines. A pair of limiting grooves are provided inside the arc-shaped plate 1014, and each of the limiting grooves has a limiting rod 1015 inside. One end of each limiting rod 1015 away from the interior of the arc-shaped plate 1014 is respectively connected to the first frame 1007 and the second frame 1008. The front of the second frame 1008 is connected. By opening several grooves 1013 on the outside of the knob 1012, the friction between the knob 1012 and the operator's fingers is increased, which makes it easier to turn the knob 1012 and avoids slipping. By setting an arc plate 1014 on the front of the first frame 1007 and the second frame 1008, when the first frame 1007 and the second frame 1008 need to be folded and stored, the arc plate 1014 is first pulled outward to separate the limiting groove in the arc plate 1014 from the limiting rod 1015, so that the first frame 1007 and the second frame 1008 can be folded subsequently.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1-5This utility model provides a technical solution: A pointer assembly 200 is provided on the upper surface of the annular seat 1001. The pointer assembly 200 includes a pointer mirror base 2001, which is disposed inside the annular seat 1001. A limiting block is connected to the bottom end of the pointer mirror base 2001, and the upper end of the limiting block is in contact with the bottom surface of the annular seat 1001. The upper end of the pointer mirror base 2001 extends to the outside of the annular seat 1001 and is fitted with a pointer arm 2002. The inner wall of the end of the pointer arm 2002 away from the pointer mirror base 2001 is clearance-fitted with the outer wall of the arc-shaped plate 1014. A square groove is formed at the upper end of the pointer mirror base 2001, and a pointer mirror body 2003 is inserted into the square groove. A pair of pointer mirror bodies 2003 are formed on the pointer mirror body 2003. A threaded hole 2004 and a pair of second threaded holes 2005 are provided on the top surface of the pointer mirror base 2001. A first bolt 2006 is threaded between the opposing first threaded holes 2004 and second threaded holes 2005. A telescope assembly 300 is provided on one side of the upper end face of the second frame 1008. The telescope assembly 300 includes a telescope bracket 3001. The bottom end of the telescope bracket 3001 passes through the second frame 1008 and is clearance-fitted with the through hole of the second frame 1008. A telescope body 3002 is connected inside the telescope bracket 3001. A biplane lens 400 is provided on one side of the upper end face of the first frame 1007. The bottom end of the biplane lens 400 passes through the first frame 1007 and is clearance-fitted with the through hole of the first frame 1007. A support assembly 500 is provided at the bottom of the first frame 1007 and the second frame 1008. The support assembly 500 includes a support base 5001. A pair of third threaded holes 5002 are opened inside the upper end of the support base 5001. A fourth threaded hole is opened at the bottom end of the first frame 1007 and the second frame 1008 near the third threaded holes 5002. A second bolt 5003 is threaded between the opposing third threaded holes 5002 and the fourth threaded holes. A pointer assembly 200 is provided to measure the angle between a celestial body and the horizon. The pointer mirror base 2001 is placed inside the annular seat 1001, and a limiting block is connected to the bottom end of the pointer mirror base 2001. A pointer arm 2002 is sleeved on the upper end, and a second bolt 5003 is provided on the pointer arm 2002. A bolt 2006 connects to the pointer mirror body 2003, thereby limiting one end of the pointer arm 2002. When the pointer arm 2002 rotates, it facilitates the rotation of the pointer mirror body 2003. At this time, the end of the pointer arm 2002 away from the pointer mirror body 2003 moves at the arc plate 1014. When it is necessary to disassemble the pointer assembly 200, first unscrew the first bolt 2006, pull the pointer mirror body 2003 upward to separate it from the square groove, thus completing the separation of the pointer mirror body 2003, the pointer mirror base 2001, and the pointer arm 2002. The telescope assembly 300 is set up for observing targets in order to accurately measure the angle between the target and the horizon or sea level. Since the bottom end of the telescope bracket 3001 passes through the second frame 1008,The second frame 1008 and the first frame 1007 are fitted together through a through hole. When the sextant needs to be folded and stored, the telescope bracket 3001 can be pulled upwards to separate the second frame 1008 and the telescope assembly 300. The bisection mirror 400 can be used as a horizon mirror to help operators measure the angle between two distant targets. The bottom end of the bisection mirror 400 passes through the first frame 1007 and fits with a through hole in the first frame 1007. When the sextant needs to be folded and stored, the bisection mirror 400 can be pulled upwards to separate the first frame 1007 and the bisection mirror 400. The third threaded hole 5002, the fourth threaded hole, and the second bolt 5003 are used together. When the second bolt 5003 is unscrewed, the support base 5001, the first frame 1007, and the second frame 1008 can be easily disassembled.

[0034] Specifically, the working principle of this novel sextant is as follows: In use, a pointer assembly 200 is set up to measure the angle between a celestial body and the horizon. The pointer mirror base 2001 is placed inside the annular base 1001, with a limiting block connected to the bottom end of the base. A pointer arm 2002 is fitted onto the upper end, and a pointer mirror body 2003 is connected to the pointer arm 2002 via a first bolt 2006, thus limiting one end of the pointer arm 2002. When the pointer arm 2002 rotates, it facilitates the rotation of the pointer mirror body 2003. At this time, the end of the pointer arm 2002 away from the pointer mirror body 2003 rests on the arc-shaped plate. The instrument is moved at position 1014 to facilitate data reading in conjunction with the scale on the curved plate 1014. The telescope assembly 300 is used to observe targets and accurately measure the angle between the target and the horizon or sea level. The bisecting mirror 400 can be used as a horizon mirror to help the operator measure the angle between two distant targets. When the sextant needs to be folded for storage, the pointer assembly 200 is first disassembled by unscrewing the first bolt 2006 and pulling the pointer mirror body 2003 upwards to separate it from the square groove. This completes the separation of the pointer mirror body 2003, the pointer mirror base 2001, and the pointer arm 2002. Because the bottom end of the telescope bracket 3001... The second frame 1008 is inserted through a through hole, and the telescope bracket 3001 is pulled upwards to separate the second frame 1008 from the telescope assembly 300. Simultaneously, the bottom end of the binary mirror 400 penetrates the first frame 1007 and is fitted with a through hole in the first frame 1007. The binary mirror 400 is pulled upwards to separate the first frame 1007 from the binary mirror 400. Then, the arc-shaped plate 1014 is pulled outwards to separate the limiting groove within the arc-shaped plate 1014 from the limiting rod 1015. Then, by rotating the two knobs 1012 respectively, the two worm gears 1011 are rotated, which in turn drive the two worm wheels 1010 to rotate, thereby realizing the rotation of the two rotating shafts 1009. When the pair of rotating shafts 1009 rotate in both directions, the first connecting seat 1005 and the second connecting seat 1006 connected to the pair of rotating shafts 1009 will rotate in both directions within the rotating groove 1004 of the I-shaped seat 1003, thereby realizing the rotation of the first frame 1007 and the second frame 1008, so that the first frame 1007 and the second frame 1008 slowly rotate from the original horizontal state to the vertical state, thereby achieving the purpose of folding, so as to facilitate subsequent carrying or storage.

Claims

1. A portable, detachable sextant scientific teaching aid, characterized in that, The folding mechanism (100) includes an annular seat (1001), with a mounting box (1002) connected to the front of the annular seat (1001). An I-shaped seat (1003) is mounted at the center of the front of the mounting box (1002). A pair of rotating grooves (1004) are provided inside the I-shaped seat (1003). A first connecting seat (1005) and a second connecting seat (1006) are rotatably connected inside the pair of rotating grooves (1004). A first frame (1007) and a second frame (1008) are connected to opposite ends of the first connecting seat (1005) and the second connecting seat (1006), respectively. The mounting box (1002)... The internal rotating connection is a pair of rotating shafts (1009). One end of each pair of rotating shafts (1009) passes through the I-shaped seat (1003) and is connected to the first connecting seat (1005) and the second connecting seat (1006) respectively. The outside of each pair of rotating shafts (1009) is fitted with a worm gear (1010). The opposite sides of the two worm gears (1010) are connected to a worm (1011). The two ends of the two worms (1011) are connected to the inner wall of the mounting box (1002) through bearings. The bottom ends of the two worms (1011) pass through the mounting box (1002) and extend to the outside, and each is fitted with a knob (1012).

2. The portable detachable sextant scientific teaching aid according to claim 1, characterized in that, The outer sides of the two knobs (1012) are provided with several grooves (1013) at equal intervals.

3. The portable detachable sextant scientific teaching aid according to claim 2, characterized in that, An arc-shaped plate (1014) is provided between the front sides of the first frame (1007) and the second frame (1008). The back side of the arc-shaped plate (1014) is in clearance fit with the front sides of the first frame (1007) and the second frame (1008). The upper end face of the arc-shaped plate (1014) is provided with scale lines. A pair of limiting grooves are provided inside the arc-shaped plate (1014). Each pair of limiting grooves is provided with a limiting rod (1015). One end of the pair of limiting rods (1015) away from the interior of the arc-shaped plate (1014) is connected to the front sides of the first frame (1007) and the second frame (1008), respectively.

4. A portable, detachable sextant scientific teaching aid according to claim 3, characterized in that, The upper surface of the annular base (1001) is provided with a pointer assembly (200). The pointer assembly (200) includes a pointer mirror base (2001), which is disposed inside the annular base (1001). A limiting block is connected to the bottom end of the pointer mirror base (2001). The upper end of the limiting block is in contact with the bottom surface of the annular base (1001). The upper end of the pointer mirror base (2001) extends to the outside of the annular base (1001) and is fitted with a pointer arm (2002). The inner wall of the end of the pointer arm (2002) away from the pointer mirror base (2001) is in clearance fit with the outer wall of the arc plate (1014). A square groove is opened at the upper end of the pointer mirror base (2001), and a pointer mirror body (2003) is inserted into the square groove.

5. A portable, detachable sextant scientific teaching aid according to claim 4, characterized in that, The pointer mirror body (2003) has a pair of first threaded holes (2004), and the pointer mirror base (2001) has a pair of second threaded holes (2005) on its top surface. A first bolt (2006) is threaded between the opposing first threaded holes (2004) and second threaded holes (2005).

6. A portable, detachable sextant scientific teaching aid according to claim 5, characterized in that, A telescope assembly (300) is provided on one side of the upper end face of the second frame (1008). The telescope assembly (300) includes a telescope bracket (3001). The bottom end of the telescope bracket (3001) passes through the second frame (1008) and is clearance-fitted with the through hole of the second frame (1008). The telescope body (3002) is connected inside the telescope bracket (3001).

7. A portable, detachable sextant scientific teaching aid according to claim 6, characterized in that, A split mirror (400) is provided on one side of the upper end face of the first frame (1007). The bottom end of the split mirror (400) passes through the first frame (1007) and is in clearance fit with the through hole of the first frame (1007).

8. A portable, detachable sextant scientific teaching aid according to claim 7, characterized in that, The first frame (1007) and the second frame (1008) are provided with a support component (500) at their bottom ends. The support component (500) includes a support base (5001). The upper end of the support base (5001) is provided with a pair of third threaded holes (5002). The bottom ends of the first frame (1007) and the second frame (1008) are provided with fourth threaded holes near the third threaded holes (5002). The third threaded holes (5002) and the fourth threaded holes are threadedly connected by a second bolt (5003).

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