Detachable protractor
By designing a detachable protractor, the connection between the scale outer ring, inner ring and bottom plate is used to avoid the origin position, and the problems of inconvenience in observation and low accuracy caused by the existing protractor structure are solved, and stable and accurate readings and variety are achieved. .
Patent Information
- Application Number
- CN202420316559.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-20
AI Technical Summary
The structure of the existing protractor causes the origin to be blocked, affecting the convenience of observation and measurement accuracy, and has a single function, so it is impossible to show more geometric principles, such as the impact of the extension of the angle line on the angle.
A removable protractor is designed, including a protractor body and an indicator accessories. The protractor body includes a scale outer ring, a scale inner ring and a bottom plate. The indicator accessories are angle reading components and extension components, which are avoided by a rotatable connection design. The origin position increases structural stability and reading convenience, and has the function of angle edge extension.
It achieves structural stability and accurate reading, avoids the problem of rotating points blocking the origin, enhances functional diversity, and can show the impact of angle edge extension on the angle.
Smart Images
Figure CN222179088U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of teaching tools, in particular to a detachable protractor. Background Art
[0002] A protractor is a drawing tool used to measure and draw arbitrary angles, and is often used with a compass.
[0003] As teaching needs change, protractors also present various forms. One existing protractor has a structure that includes a bottom body, a scale ring, and a rotating rod, one end of which is rotatably connected to the middle of the bottom body. However, since the connection is located in the middle, the center point (i.e., the origin) of the bottom body of this type of protractor will be blocked, which will affect the convenience of observation or measurement accuracy. In addition, in the prior art, the rotating rod also shakes, which will also affect the accuracy.
[0004] In addition, the functions of existing protractors are relatively simple and cannot show students more geometric principles. For example, extending the angle line does not affect the angle.
[0005] Therefore, it is urgent to improve the existing protractor to meet the market demand. Utility Model Content
[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a detachable protractor with the characteristics of stable structure, convenient and accurate reading, and the functions of measuring angles and showing the influence of the extension of the angle sideline on the angle. It is achieved through the following technical solutions:
[0007] A detachable protractor comprises a protractor body and an indicating accessory, wherein the indicating accessory is movably connected to the protractor body; the protractor body comprises a scale outer ring, a scale inner ring and a base plate; the indicating accessory is an angle reading assembly, wherein the angle reading assembly comprises a first seat body and an indicating rod, wherein the first seat body is mounted in the middle of the base plate, and the indicating rod is rotatably connected to the first seat body; or, the indicating accessory is an extended angle assembly, wherein the extended angle assembly comprises a second seat body, a first extending rod and a second extending rod, wherein the second seat body is mounted in the middle of the base plate, and the first extending rod and the second extending rod are rotatably connected to the second seat body, respectively.
[0008] Preferably, a boss is provided on the bottom plate, a first limiting hole is provided on the first seat body, and the boss is embedded in the first limiting hole; or a second limiting hole is provided on the second seat body, and the boss is embedded in the second limiting hole.
[0009] Preferably, the number of the bosses is more than 2, and the number of the first limiting holes or the second limiting holes is more than 2.
[0010] Preferably, an origin mark is provided on the bottom plate of the protractor body.
[0011] Preferably, the indicator rod is rotatably connected to the first base body via a first rotating shaft, or the first extension rod and the second extension rod are rotatably connected to the second base body via a second rotating shaft respectively; the first rotating shaft or the second rotating shaft is located directly above the origin mark.
[0012] Preferably, the indicator rod is provided with two observation holes and a guide line.
[0013] Preferably, a limiting protrusion is provided at the outer end of one side surface of the indicator rod.
[0014] Preferably, the first extension rod includes a first fixed rod and a first movable rod, and the first movable rod can slide relative to the first fixed rod to extend outward; the second extension rod includes a second fixed rod and a second movable rod, and the second movable rod can slide relative to the second fixed rod to extend outward.
[0015] Preferably, the middle parts of the outer scale ring and the inner scale ring are connected via an intermediate plate, and a reference hole is provided on the intermediate plate.
[0016] Preferably, the indicating accessory is made of transparent material.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] (1) The angle measuring body of the present technical solution comprises an outer scale ring and an inner scale ring, wherein one of the outer scale ring and the inner scale ring is respectively arranged to have an angle from small to large or from large to small, so as to facilitate reading the angle from different directions; and the outer scale ring and the inner scale ring are connected by an intermediate plate, so that the structure of the present device is more stable.
[0019] (2) The angle reading assembly of the present technical solution is connected to the base plate via the first seat body, and the connection point avoids the position of the angle measurement origin, thereby avoiding the indicator rod being rotatably connected to the base plate directly, so that there is no problem of the rotation point blocking the angle measurement origin; similarly, the angle extension assembly of the present technical solution is connected to the base plate via the second seat body, and there is no problem of the rotation point blocking the angle measurement origin, and such a connection method makes it difficult for the indicator rod to shake, or the first extension rod and the second extension rod to shake.
[0020] (3) The indicating accessory of the present technical solution includes an angle reading component and an angle extension component, both of which are detachably connected to the angle measuring body to realize the angle measuring function. In addition, the present device can also display the effect of extending the angle side line on the angle, and has various functions. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 It is the front side of the structural diagram of the protractor body of the utility model;
[0024] Figure 2 It is the reverse side of the protractor body structure diagram of the utility model;
[0025] Figure 3 It is a structural diagram of the indicating accessory of the utility model as an angle reading component;
[0026] Figure 4 This is one of the structural diagrams of the indicator accessory of the utility model as an extended angle component;
[0027] Figure 5 It is a structural diagram of the extended angle assembly of the indicator accessory of the utility model;
[0028] Figure 6 This is the second structural diagram of the indicator accessory of the utility model as an extended angle component;
[0029] Figure 7 It is an exploded view of the indicating accessory of the utility model as an angle reading component;
[0030] Figure 8 It is a structural exploded view of the indicator accessory of the utility model as an extended angle component;
[0031] Fig. 9 It is a structural diagram of the indicating rod of the protractor of the utility model.
[0032] Description of reference numerals:
[0033] 1 angle measuring body, 11 outer ring with scale, 12 inner ring with scale, 13 bottom plate, 131 boss, 14 origin mark, 15 middle plate; 2 indicating accessories;
[0034] 3 reading angle assembly, 31 first seat body, 311 first limiting hole, 32 indicating rod, 321 limiting protrusion, 33 first rotating shaft 4 extended angle assembly, 41 second seat body, 411 second limiting hole, 42 first extended rod, 421 first fixed rod, 422 first movable rod; 43 second extended rod, 431 second fixed rod, 432 second movable rod, 44 second rotating shaft. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.
[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0038] A preferred embodiment of the present invention is as follows Figure 1-4As shown, a detachable protractor includes an angle measuring body 1 and an indicating accessory 2, and the indicating accessory 2 is movably connected to the angle measuring body 1; the angle measuring body 1 includes a scale outer ring 11, a scale inner ring 12 and a bottom plate 13; the indicating accessory 2 is an angle reading component 3, and the angle reading component 3 includes a first seat body 31 and an indicating rod 32, the first seat body 31 is installed in the middle of the bottom plate 13, and the indicating rod 32 is rotatably connected to the first seat body 31; or, the indicating accessory 2 is an extended angle component 4, and the extended angle component 4 includes a second seat body 41, a first extension rod 42 and a second extension rod 43, the second seat body 41 is installed in the middle of the bottom plate 13, and the first extension rod 42 and the second extension rod 43 are rotatably connected to the second seat body 41. The indicating accessory 2 of the technical solution includes both the angle reading component 3 and the extended angle component 4, both of which are detachably connected to the angle measuring body 1 to realize the angle measuring function, and the device can also show the influence of the extension of the angle side line on the angle, with various functions, suitable for teaching.
[0039] Preferably, Figure 1 As shown, a groove is disposed on the bottom plate 13 , and the protruding column 131 is disposed at the groove, and the first base body 31 or the second base body 41 is embedded in the groove.
[0040] Furthermore, one of the outer scale ring 11 and the inner scale ring 12 is respectively set to have an angle from small to large or from large to small, so as to facilitate reading the angle from different directions; and the outer scale ring 11 and the inner scale ring 12 are connected by an intermediate plate 15, so that the structure of the device is more stable.
[0041] Specifically, Figure 7-8 As shown, the first seat body 31 is provided with a first limiting hole 311 , and the boss 131 is embedded in the first limiting hole 311 ; or, the second seat body 41 is provided with a second limiting hole 411 , and the boss 131 is embedded in the second limiting hole 411 .
[0042] Specifically, the number of the protruding columns 131 is more than two, and the number of the first limiting holes 311 or the second limiting holes 411 is more than two.
[0043] In this way, the angle reading component 3 is connected to the base plate 13 through the first seat body 31, and the connection point avoids the position of the angle measurement origin, thereby avoiding the indicator rod 32 being directly rotatably connected to the base plate 13, so that the problem of the rotation point blocking the angle measurement origin in the prior art does not exist; similarly, the extended angle component 4 of the present technical solution is connected to the base plate 13 through the second seat body 41, and there is no problem of the rotation point blocking the angle measurement origin in the prior art.
[0044] Specifically, an origin mark 14 is provided on the bottom plate 13 of the angle measuring body 1 .
[0045] Specifically, the indicator rod 32 is rotatably connected to the first base body 31 via the first rotating shaft 33, or the first extension rod 42 and the second extension rod 43 are rotatably connected to the second base body 41 via the second rotating shaft 44 respectively; the first rotating shaft 33 or the second rotating shaft 44 is located directly above the origin mark 14.
[0046] Specifically, two viewing holes and guide lines are provided on the indicator rod 32 to facilitate reading of the angle.
[0047] Specifically, Fig. 9 As shown, a limiting protrusion 321 is provided at the outer end of one side of the indicator rod 32. It is used to be more stable and will not deviate when rotating.
[0048] Specifically, Figure 5-6 As shown, the first extension rod 42 includes a first fixed rod 421 and a first movable rod 422, and the first movable rod 422 can slide relative to the first fixed rod 421 to extend outward; the second extension rod 43 includes a second fixed rod 431 and a second movable rod 432, and the second movable rod 432 can slide relative to the second fixed rod 431 to extend outward.
[0049] Specifically, Figure 1 As shown, the middle parts of the scale outer ring 11 and the scale inner ring 12 are connected via an intermediate plate 15 , and a reference hole is provided on the intermediate plate 15 .
[0050] Specifically, the indicating accessory 2 is made of a transparent material. Optionally, the angle measuring body 1 can also be made of a transparent material plate with angle scales added thereto.
[0051] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.
Claims
1. A detachable protractor, characterized in that: It comprises an angle measuring body and an indicating accessory, wherein the indicating accessory is movably connected to the angle measuring body; The angle measuring body comprises a scale outer ring, a scale inner ring and a bottom plate; The indicating accessory is an angle reading assembly, and the angle reading assembly includes a first seat body and an indicating rod, wherein the first seat body is installed in the middle of the bottom plate, and the indicating rod is rotatably connected to the first seat body; or, The indicating accessory is an extended angle assembly, which includes a second seat body, a first extension rod and a second extension rod. The second seat body is installed in the middle of the base plate, and the first extension rod and the second extension rod are rotatably connected to the second seat body respectively.
2. The detachable protractor according to claim 1, characterized in that: The bottom plate is provided with a convex column, the first seat body is provided with a first limiting hole, and the convex column is embedded in the first limiting hole; Alternatively, a second limiting hole is provided on the second seat body, and the protruding column is embedded in the second limiting hole.
3. The detachable protractor according to claim 2, characterized in that: The number of the protruding columns is more than 2, and the number of the first limiting holes or the second limiting holes is more than 2.
4. The detachable protractor according to claim 1, characterized in that: An origin mark is arranged on the bottom plate of the angle measuring body.
5. The detachable protractor according to claim 4, characterized in that: The indicating rod is rotatably connected to the first seat body via a first rotating shaft, or the first extension rod and the second extension rod are rotatably connected to the second seat body via a second rotating shaft respectively; the first rotating shaft or the second rotating shaft is located directly above the origin mark.
6. The detachable protractor according to claim 1, characterized in that: The indicating rod is provided with two observation holes and a guide line.
7. The detachable protractor according to claim 6, characterized in that: A limiting protrusion is arranged on the outer end of one side surface of the indicating rod.
8. The detachable protractor according to claim 1, characterized in that: The first extension rod comprises a first fixed rod and a first movable rod, and the first movable rod can slide relative to the first fixed rod to extend outward; The second extension rod includes a second fixed rod and a second movable rod, and the second movable rod can slide relative to the second fixed rod to extend outward.
9. The detachable protractor according to claim 1, characterized in that: The middle parts of the outer scale ring and the inner scale ring are connected via an intermediate plate, and a reference hole is arranged on the intermediate plate.
10. The detachable protractor according to any one of claims 1 to 9, characterized in that: The indicating accessory is made of transparent material.