A three-bar positioner

Abstract

The present application belongs to the field of positioner, and particularly relates to a three-rod positioner, which comprises a scale disc, a top rod, a limiting part, a compression spring, a left index rod, a middle index rod, a right index rod, a pointer assembly and a cap. The center of the scale disc is provided with a sleeve. Two opposite side walls of the sleeve are provided with barrel-shaped inner recesses, and the bottoms of the inner recesses are provided with through holes. One end of the top rod passes through the through hole from the opening end of the inner recess and is provided with the limiting part, and the other end of the top rod is provided with a protrusion. The compression spring is sleeved on the top rod. The first, second and third sections of the left and right index rods are rotatable around the respective hinge shafts to make the tips of the left and right index rods respectively top the other ends of the two top rods. The cap is arranged on the sleeve to make the left and right index rods unable to be separated from the sleeve, and the two opposite side walls of the cap are provided with slot holes corresponding to the positions of the through holes. The three index rods of the present application can be folded and stored, so that the occupied space of the three-rod positioner is reduced, and the three index rods can be used as tools for disassembling the index rods.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of positioner, and particularly relates to a three-pole positioner. BACKGROUND

[0002] The three-pole positioner is generally used for determining position in the field of navigation, and generally has three adjustable poles which are usually made of light and strong material such as aluminum alloy, so as to facilitate operation and use on the ship.

[0003] The three-pole positioner currently used is relatively large in size and inconvenient to carry, and as a precision instrument, the scale disc thereof is easily damaged, such as the rotating shaft being easily rusted, the spring clip being easily lost in elasticity or parts, and the like, so that the three-pole positioner needs to be frequently disassembled and maintained. The existing three-pole positioner is provided with a cap at the rotating shaft, and the cap is fixed on the scale disc by screws. During the process of disassembly and assembly, a special tool such as a screwdriver needs to be used, and the tool is not usually carried when used outside, so that it is very troublesome if a fault occurs. SUMMARY

[0004] The problems in the background art can be effectively solved.

[0005] The three-pole positioner provided by the present application comprises a scale disc, a top pole, a limiting part, a compression spring, an index left pole, an index middle pole, an index right pole, a pointer assembly and a cap.

[0006] The center of the scale disc is provided with a sleeve; two opposite side walls of the sleeve are provided with side-lying barrel-shaped inner recesses, and the bottoms of the inner recesses are provided with through holes;

[0007] One end of the top pole passes through the through hole from the opening end of the inner recess and is installed with the limiting part, and the other end of the top pole is provided with a protrusion, and the protrusion and the limiting part limit the top pole from separating from the through hole;

[0008] The compression spring is sleeved on the top pole, and the compression spring is located between the protrusion and the bottom of the inner recess;

[0009] One end of the index middle pole is fixed with the scale disc; one end of the index left pole and the index right pole is rotatably sleeved on the sleeve; the index left pole and the index right pole are each provided with a first segment, a second segment and a third segment; one end of the first segment is sleeved on the sleeve, the other end of the first segment is hingedly connected with one end of the second segment; the other end of the second segment is hingedly connected with one end of the third segment; the other end of the third segment is provided with a pointed end; and the first segment, the second segment and the third segment of the index left pole and the index right pole are rotatable around the respective hinged shafts to make the pointed ends top the other ends of the two top poles, respectively;

[0010] The pointer assembly is provided with two groups and is fixed with the index left pole and the index right pole, respectively; and the pointer assembly can drive the index left pole and the index right pole to rotate around the axis of the sleeve;

[0011] The cap covers the sleeve so that the index left rod and the index right rod cannot be separated from the sleeve, and the two opposite side walls of the cap are provided with slot holes corresponding to the positions of the through holes; the other end of the jacking rod is located in the slot hole in the natural state of the compression spring.

[0012] As a further optimization of the application, the open end of the cap is provided with a flange.

[0013] As a further optimization of the application, the other end of the jacking rod is hemispherical; the pointed end is hemispherical corresponding to the other end of the jacking rod.

[0014] As a further optimization of the application, the side wall of the first section is provided with a first accommodating slot; the second section can be completely accommodated in the first accommodating slot by rotating around the hinge shaft of the first section; the side wall of the second section is provided with a second accommodating slot; the third section can be completely accommodated in the second accommodating slot by rotating around the hinge shaft of the second section.

[0015] As a further optimization of the application, the jacking rod is cylindrical; the limiting part is a clamping spring.

[0016] The three-rod positioning instrument provided by the application can fold and accommodate three index rods, thereby reducing the occupied space of the three-rod positioning instrument, and the three index rods can be used as tools for disassembling the index rods. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the appearance structure of the application;

[0018] Figure 2 is a schematic diagram of the cap installation part of the application;

[0019] Figure 3 is a schematic diagram of the index rod structure of the application;

[0020] Figure 4 is Figure 3 a partial enlarged schematic diagram;

[0021] Figure 5 is Figure 3 a folded structure schematic diagram;

[0022] Among them, the dial 1, the sleeve 1a, the inner recess 1a1, the through hole 1a2, the jacking rod 2, the protrusion 2a, the limiting part 3, the compression spring 4, the index left rod 5, the first section 5a, the first accommodating slot 5a1, the second section 5b, the second accommodating slot 5b1, the third section 5c, the pointed part 5c1, the index middle rod 6, the index right rod 7, the pointer assembly 8, the cap 9, the slot hole 9a, and the flange 9b. DETAILED DESCRIPTION

[0023] As Figures 1-5As shown, the embodiment includes a dial 1, a top rod 2, a limiting part 3, a compression spring 4, a pointer left rod 5, a pointer middle rod 6, a pointer right rod 7, a pointer assembly 8, a cap 9.

[0024] The dial 1 is provided with a sleeve 1a in the center. Two opposite side walls of the sleeve 1a are provided with barrel-shaped inner recesses 1a1, the two inner recesses 1a1 are opposite in opening, and the bottom of the inner recess 1a1 is provided with a through hole 1a2.

[0025] The top rod 2 is cylindrical, one end of the top rod 2 passes through the through hole 1a2 from the opening end of the inner recess 1a1 and is installed with the limiting part 3, the limiting part 3 is a snap spring, a clamping groove is arranged on the side wall of one end of the top rod 2, the snap spring is clamped in the clamping groove, and the diameter of the snap spring is greater than that of the through hole 1a2. In other embodiments, the limiting part 3 can be a stop sheet, the size of the stop sheet is greater than that of the through hole 1a2, and the stop sheet is fixed on the end face of one end of the top rod 2.

[0026] The other end of the top rod 2 is provided with a protrusion 2a, the size of the protrusion 2a is greater than that of the through hole 1a2, and the protrusion 2a and the limiting part 3 limit the top rod 2 from leaving the through hole 1a2. The compression spring 4 is sleeved on the top rod 2, and the compression spring 4 is located between the protrusion 2a and the bottom of the inner recess 1a1.

[0027] The pointer rod includes the pointer left rod 5, the pointer middle rod 6 and the pointer right rod 7. One end of the pointer middle rod 6 is fixed with the dial 1, and one end of the pointer left rod 5 and the pointer right rod 7 is rotatably sleeved on the sleeve 1a. The pointer left rod 5, the pointer middle rod 6 and the pointer right rod 7 are similar in structure, and the pointer left rod 5 is taken as an example for illustration. The pointer left rod 5 is provided with a first section 5a, a second section 5b and a third section 5c. One end of the first section 5a is sleeved on the sleeve 1a, the other end of the first section 5a is hingedly connected with one end of the second section 5b; the other end of the second section 5b is hingedly connected with one end of the third section 5c; the other end of the third section 5c is provided with a pointed part 5c1. The first section 5a, the second section 5b and the third section 5c of the pointer left rod 5 and the pointer right rod 7 are rotatable around the respective hinged axes, so that the pointed part 5c1 can top the other end of the two top rods 2 respectively. In this structure, the pointer left rod 5, the pointer middle rod 6 and the pointer right rod 7 can be folded up, so that the storage space can be reduced.

[0028] Preferably, the side wall of the first segment 5a is provided with a first receiving groove 5a1; the second segment 5b can be completely housed in the first receiving groove 5a1 by rotating about the hinge axis with the first segment 5a; the side wall of the second segment 5b is provided with a second receiving groove 5b1; and the third segment 5c can be completely housed in the second receiving groove 5b1 by rotating about the hinge axis with the second segment 5b. Since this embodiment requires that the first segment 5a, the second segment 5b, and the third segment 5c of the left index rod 5 and the right index rod 7 rotate about their respective hinge axes so that the tip 5c1 respectively pushes against the other end of the two top rods 2, when the second segment 5b is housed in the first segment 5a, the openings of the second receiving groove 5b1 and the first receiving groove 5a1 are opposite each other. This can prevent dust accumulation in the second receiving groove 5b1 and the first receiving groove 5a1.

[0029] The pointer assembly 8 has two sets, which are fixed to the left pointer 5 and the right pointer 7 respectively. The pointer assembly 8 can drive the left pointer 5 and the right pointer 7 to rotate around the axis of the sleeve 1a. Specifically, the dial 1 is designed with two layers, the upper layer is marked with graduations, and the lower layer has a gear ring. The pointer on the pointer assembly 8 is attached to the lower layer and points to the graduations on the upper layer. The pointer assembly 8 has a worm gear that meshes with the gear ring. The worm gear has a handle. By rotating the worm gear, the pointer is driven to rotate around the graduations on the upper layer.

[0030] The cap 9 is placed on the sleeve 1a to prevent the left indicator rod 5 and the right indicator rod 7 from detaching from the sleeve 1a. Specifically, the open end of the cap has a flange 9b to prevent the left indicator rod and the right indicator rod 7 from detaching from the sleeve 1a. The two opposite side walls of the cap 9 have slots 9a corresponding to the through holes 1a2. In its natural state, the compression spring 4 keeps the other end of the push rod 2 within the slot 9a. This prevents the push rod 2 from protruding and avoids accidentally touching the push rod 2 to open the cap 9.

[0031] Preferably, the other end of the push rod 2 is hemispherical, and the tip 5c1 of the third segment 5c is hemispherical, corresponding to the other end of the push rod 2.

[0032] When it is necessary to disassemble the left indicator rod 5 and the right indicator rod 7, simply rotate the left indicator rod 5 and the right indicator rod 7 so that the hemispherical ends of the left indicator rod 5 and the right indicator rod 7 respectively abut against the hemispherical ends of the two push rods 2. The push rods 2 overcome the elastic force of the compression spring 4, and the hemispherical ends of the push rods 2 retract into the concave part 1a1. Then rotate the cap 9 to remove the cap 9. After that, the left indicator rod 5 and the right indicator rod 7 can be easily removed from the sleeve 1a.

[0033] The indicator rod in this embodiment is not only easy to store, but can also be used as a tool to open the cap 9.

[0034] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A three-rod positioner, characterized by, The dial, the top rod, the limiting part, the compression spring, the index left rod, the index middle rod, the index right rod, the pointer assembly, and the cap are included. The center of the dial is provided with a sleeve, two opposite side walls of the sleeve are provided with barrel-shaped inner recesses, and the bottoms of the inner recesses are provided with through holes. One end of the top rod passes through the through hole from the opening end of the inner recess and is installed with the limiting part, and the other end of the top rod is provided with a protrusion, which limits the top rod from leaving the through hole together with the limiting part. The compression spring is sleeved on the top rod and located between the protrusion and the bottom of the inner recess. One end of the index middle rod is fixed with the dial, and one end of the index left rod and the index right rod is rotatably sleeved on the sleeve. The index left rod and the index right rod are each provided with a first section, a second section, and a third section. One end of the first section is sleeved on the sleeve, the other end of the first section is hingedly connected with one end of the second section, the other end of the second section is hingedly connected with one end of the third section, and the other end of the third section is provided with a pointed end.

2. A three-rod positioner according to claim 1, characterized in that The pointer assembly is provided with two groups and is fixed with the index left rod and the index right rod.

3. A three-rod positioner according to claim 1, wherein, The cap is provided with a flange at the opening end.

4. A three-rod positioner according to claim 1, wherein, The other end of the top rod is provided with a hemispherical end.

5. A three-rod positioner according to claim 1, wherein The pointed end is provided with a hemispherical end corresponding to the other end of the top rod. The side wall of the first section is provided with a first accommodating groove, the second section can be completely accommodated in the first accommodating groove by rotating around the hinge shaft of the first section, the side wall of the second section is provided with a second accommodating groove, and the third section can be completely accommodated in the second accommodating groove by rotating around the hinge shaft of the second section. The top rod is in a cylindrical shape. The limiting part is a clasp spring.

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