Novel dial plate type compasses

Abstract

The utility model relates to the technical field of compasses, and discloses a novel dial type compass which comprises a watchcase and compass legs symmetrically and rotatably arranged in the watchcase, rack parts are arranged at the tops of the two compass legs, the two rack parts are meshed with each other to achieve synchronous reverse rotation of the two compass legs, a ring gear is rotatably connected in the watchcase, and the two rack parts are meshed with each other to achieve synchronous reverse rotation of the two compass legs. Wherein one rack part is provided with linkage teeth, the ring gear is meshed with the linkage teeth, a dial plate is fixedly connected to the watchcase, a pointer is rotatably connected to the interior of the dial plate, a center gear and a linkage gear are further rotatably connected to the interior of the watchcase, the center gear is meshed with the linkage gear, and the linkage gear is meshed with the center gear. The novel compass is simple in structure and convenient to disassemble and assemble, the unfolding angle of the compass foot can be effectively determined through the scales on the dial plate, the angle precision is high, and observation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of compass technology, and in particular to a novel dial-type compass. Background Technology

[0002] Conventional compasses include: a center leg with a needle at its tip; a rotating leg that holds a writing instrument such as a pencil at its tip and allows it to rotate; a mounting body that supports the rotating leg and the center leg in a manner that allows the rotating leg and the center leg to open and close; and an operating body that is a slender, generally cylindrical shape protruding upwards from the mounting body, the compass holding the pencil at the tip of the rotating leg by a thread.

[0003] In existing technologies, when drawing a circle with a compass, it is necessary to use external measuring tools such as rulers to confirm the angle of the compass legs, which is cumbersome and inefficient. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a novel dial-type compass, solving the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel dial-type compass, comprising a case and compass feet symmetrically rotatably disposed within the case. Each of the two compass feet has a rack portion at its top, and the two rack portions mesh with each other to achieve synchronous counter-rotation of the two compass feet. A ring gear is rotatably connected within the case, and one of the rack portions has a linkage tooth. The ring gear meshes with the linkage tooth. A dial is fixedly connected to the case, and a pointer is rotatably connected within the dial. A central gear and a linkage gear are also rotatably connected within the case. The central gear meshes with the linkage gear, and one side of the central gear is fixedly connected to the pointer. The linkage gear meshes with the ring gear.

[0008] Preferably, the watch case has a front cover and a back cover on each side.

[0009] Preferably, a fixing groove is provided inside the watch case, a first fixing plate is provided in the fixing groove, and a second fixing plate is also provided inside the watch case.

[0010] Preferably, one of the compass feet is provided with a permanent lead core at its bottom.

[0011] (III) Beneficial Effects

[0012] This utility model provides a novel dial-type compass, which has the following advantages: simple structure, easy assembly and disassembly, and the unfolding angle of the compass legs can be effectively determined by the scale on the dial, with high angular accuracy and convenient observation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall assembly of this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the dial of this utility model;

[0015] Figure 3 This is a schematic diagram of the compass foot assembly of this utility model;

[0016] Figure 4 This is an assembly diagram of the first fixing plate and the second fixing plate of this utility model;

[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the compass foot of this utility model.

[0018] In the diagram: 1. Watch case; 101. Fixing groove; 102. First fixing plate; 103. Second fixing plate; 2. Compass foot; 201. Rack section; 3. Ring gear; 301. Linkage gear; 302. Hand; 303. Center gear; 304. Linkage gear; 4. Dial; 401. Front cover; 402. Back cover; 5. Perpetual lead core. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0022] Example

[0023] like Figures 1-5 As shown, this utility model provides a novel dial-type compass, including a case 1 and compass feet 2 symmetrically rotatably disposed within the case 1. Each compass foot 2 has a rack portion 201 at its top, and the two rack portions 201 mesh with each other to achieve synchronous reverse rotation of the two compass feet 2. A ring gear 3 is rotatably connected inside the case 1, and one of the rack portions 201 has a linkage tooth 301 that meshes with the ring gear 3. A dial 4 is fixedly connected to the case 1, and a pointer 302 is rotatably connected inside the dial 4. A central gear 303 and a linkage gear 304 are also rotatably connected inside the case 1. The central gear 303 meshes with the linkage gear 304, and one side of the central gear 303 is fixedly connected to the pointer 302. The linkage gear 304 meshes with the ring gear 3.

[0024] Specifically: The two compass legs 2 rotate synchronously and in opposite directions through two meshing rack sections 201, thereby enabling the compass legs 2 to fold and unfold. When the compass legs 2 rotate, they drive the linkage gear 301 to rotate, which in turn drives the ring gear 3 to rotate. The ring gear 3 drives the linkage gear 304 to rotate, which in turn drives the center gear 303 to rotate, thus causing the pointer 302 to rotate. The pointer 302 is used to indicate the scale on the dial 4, thereby more intuitively confirming the unfolded angle of the compass legs 2 and improving the accuracy of drawing.

[0025] The watch case 1 has a front cover 401 and a back cover 402 on each side. The back cover 402 and the front cover 401 are connected to the watch case 1 by a snap-fit, making them easy to install and remove.

[0026] The watch case 1 has a fixing groove 101 inside, and a first fixing plate 102 is provided in the fixing groove 101. A second fixing plate 103 is also provided inside the watch case 1. The second fixing plate 103 is used to engage the linkage gear 304 and enable the linkage gear 304 to rotate. The first fixing plate 102 is used to engage the center gear 303 and enable the center gear 303 to rotate. Then, the first fixing plate 102 and the second fixing plate 103 are fixed in the watch case 1 by screws. The fixing groove 101 provides installation space for the insertion end of the bottom of the first fixing plate 102.

[0027] One of the compass feet 2 has a permanent lead 5 at its bottom. Compared to traditional mechanical pencils, the permanent lead 5 is more durable as it does not break the lead.

[0028] The working principle of this utility model is as follows: The two compass legs 2 rotate synchronously and in opposite directions through two meshing rack parts 201, thereby realizing the folding and unfolding of the compass legs 2. When the compass legs 2 rotate, they drive the linkage gear 301 to rotate, the linkage gear 301 drives the ring gear 3 to rotate, the ring gear 3 drives the linkage gear 304 to rotate, and the linkage gear 304 drives the center gear 303 to rotate, thereby realizing the rotation of the pointer 302. The pointer 302 is used to indicate the scale of the dial 4, so as to more intuitively confirm the unfolded angle of the compass legs 2 and improve the drawing accuracy.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel dial-type compass, comprising a case (1) and compass feet (2) symmetrically rotatably disposed within the case (1), characterized in that: The top of each of the two compass feet (2) is provided with a rack portion (201), and the two rack portions (201) mesh with each other to realize the synchronous reverse rotation of the two compass feet (2). A ring gear (3) is rotatably connected inside the watch case (1), and a linkage tooth (301) is provided on one of the rack portions (201). The ring gear (3) meshes with the linkage tooth (301). A dial (4) is fixedly connected to the watch case (1), and a pointer (302) is rotatably connected inside the dial (4). A central gear (303) and a linkage gear (304) are also rotatably connected inside the watch case (1). The central gear (303) meshes with the linkage gear (304), and one side of the central gear (303) is fixedly connected to the pointer (302). The linkage gear (304) meshes with the ring gear (3).

2. The novel dial-type compass according to claim 1, characterized in that: The watch case (1) is provided with a front cover (401) and a rear cover (402) on both sides respectively.

3. A novel dial-type compass according to claim 1, characterized in that: The watch case (1) has a fixing groove (101) inside, a first fixing plate (102) is provided in the fixing groove (101), and a second fixing plate (103) is also provided in the watch case (1).

4. A novel dial-type compass according to claim 1, characterized in that: One of the compass feet (2) has a permanent lead core (5) at its bottom.

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