Rotating digital display apparatus

Abstract

A rotating digital display apparatus (100), comprising: a main body support (10), a battery (20), a flexible circuit board (30), a light pipe (40), an optical film (50), and a projective dome (60). The main body support (10) comprises a cylindrical surface (13), a first end portion (11), and a second end portion (12); the battery (20) is arranged within the main body support (10); the flexible circuit board (30) is attached to and surrounds the cylindrical surface (13) and is provided with a light position (31); the light pipe (40) is provided with a clearance hole (401); the optical film (50) is attached to the light pipe (40); and the projective dome (60) is configured for projecting and displaying predetermined content or texture of the optical film (50). This allows for predetermined content or texture to be displayed. In addition, the main body support (10) is rotatably engaged with a terminal, and can be driven to rotate 360° by means of rotating the projective dome (60), thereby achieving the functions of externally displaying various content and switching interfaces, and enabling strong interaction between people and electronic products.

Description

Rotary digital display device

[0001]

TECHNICAL FIELD

[0002] The present application relates to the technical field of nixie tube, and particularly to a rotary digital display device.

[0003]

BACKGROUND TECHNIQUE

[0004] At present, with the development of science and technology, more and more various electronic terminal products, such as electronic cigarettes, electronic toys and the like, are provided with display devices such as nixie tubes to improve the functions of electronic products. However, most of the existing nixie tube industry is a conventional static display screen, and the interaction between people and products is single, the display content is less, and the interestingness is low. In view of this, it is necessary to provide a rotary digital display device to overcome the above defects.

[0005]

SUMMARY OF THE INVENTION

[0006] The purpose of the present application is to provide a rotary digital display device, which aims to improve the problems of less display content, single interaction and low interestingness of the existing nixie tube, and to enhance the interestingness, novelty and interaction of electronic products, and to fill the current market blank direction.

[0007] In order to achieve the above purpose, the present application provides a rotary digital display device for installation on a terminal, comprising:

[0008] A main support in a hollow cylindrical shape, comprising a cylindrical surface and a first end portion and a second end portion respectively arranged at both ends of the cylindrical surface; the first end portion and the second end portion are respectively used for rotating and matching connection with the preset parts of the terminal;

[0009] A battery arranged in the main support;

[0010] A flexible circuit board attached around the cylindrical surface and electrically connected with the battery; a predetermined position of the flexible circuit board is provided with a lamp position for displaying predetermined content or texture;

[0011] A light guide column, which is hollow inside to press the flexible circuit board on the cylindrical surface; the light guide column is also provided with a avoiding hole corresponding to the lamp position;

[0012] A diaphragm attached to the side of the light guide column away from the flexible circuit board, for displaying the predetermined content or texture formed by the light emitted by the lamp position through the avoiding hole;

[0013] A shadow projection ball cover fixed on the main support and spaced around the diaphragm to project and display the predetermined content or texture on the diaphragm.

[0014] In a preferred implementation form, the light guide column comprises a first arc-shaped piece and a second arc-shaped piece, both in a semicircle shape; both side edges of the first arc-shaped piece extend outwardly and perpendicularly to form a first connecting piece, and both side edges of the second arc-shaped piece extend outwardly and perpendicularly to form a second connecting piece; the first connecting piece is provided with a plurality of clamping columns, and the second connecting piece is provided with a plurality of clamping holes corresponding to the clamping columns; the clamping columns are used to be clamped with the corresponding clamping holes to jointly enclose the first arc-shaped piece and the second arc-shaped piece into a cylindrical cavity to cover and press the flexible circuit board.

[0015] In a preferred implementation form, the surface of the light guide column away from the flexible circuit board is provided with a plurality of isolation pieces in the radial direction, which are used to separate the surface of the light guide column into a plurality of areas; the number of the diaphragms is plural, and each diaphragm is attached to one of the areas; part of the isolation pieces can be reused with the first connecting piece and the second connecting piece.

[0016] In a preferred implementation form, the cylindrical surface is provided with a first positioning pin and a second positioning pin in the radial direction; the inside of the flexible circuit board is provided with a limiting hole matched with the first positioning pin, and both side edges of the flexible circuit board are provided with a semicircular positioning groove when the flexible circuit board is unfolded; the two positioning grooves are a group to jointly enclose the circumferential side of the second positioning pin.

[0017] In a preferred implementation form, the first arc-shaped piece is provided with a first positioning hole matched with the second positioning pin, and the second arc-shaped piece is provided with a second positioning hole matched with the first positioning pin.

[0018] In a preferred implementation form, the first end portion is provided with a limiting support, which is used to limit the action of the battery extending out of the first end portion.

[0019] In a preferred implementation form, the edge of the first end portion is provided with a first limiting groove, and the edge of the second end portion is provided with a second limiting groove; the first limiting groove and the second limiting groove are respectively used to cooperate with the preset components of the terminal to dampen and limit the rotation angle of the main support.

[0020] In a preferred implementation form, one side of the flexible circuit board close to the first end portion is provided with a first electrode conductive contact piece and a data port conductive contact piece in a circle along the circumferential direction; the first electrode conductive contact piece and the data port conductive contact piece are arranged in a spaced manner and electrically connected with one electrode of the battery; one side of the flexible circuit board close to the second end portion is provided with a second electrode conductive contact piece and a forward and reverse rotation detection conductive contact piece in a circle along the circumferential direction; the second electrode conductive contact piece and the forward and reverse rotation detection conductive contact piece are arranged in a spaced manner and electrically connected with another electrode of the battery.

[0021] In a preferred embodiment, the flexible circuit board extends axially to form a first terminal near a preset position of the first end portion, the first end portion is provided with a first accommodating groove for the first terminal to extend into, and the first terminal is electrically connected with the positive or negative pole of the battery; the flexible circuit board extends axially to form a second terminal near a preset position of the second end portion, the second end portion is provided with a second accommodating groove for the second terminal to extend into, and the second terminal is electrically connected with the negative or positive pole of the battery.

[0022] In a preferred embodiment, the shadow sphere cover comprises a first half cover and a second half cover which are buckled together; the first half cover is provided with a semicircular first avoiding groove near both ends of the main support, the second half cover is provided with a semicircular second avoiding groove near both ends of the main support, and the first avoiding groove and the second avoiding groove are jointly arranged on the cylindrical surface of the main support, and the first electrode conductive tab, the data port conductive tab, the second electrode conductive tab and the positive / negative detection conductive tab are all located outside the shadow sphere cover.

[0023] The rotating digital display device provided by the application can press and wind the flexible circuit board on the cylindrical surface of the main support through the light guide column, so that when the light in the lamp of the flexible circuit board emits light, the light can pass through the avoiding hole of the light guide column and then be displayed on the diaphragm and finally be projected on the shadow sphere cover, realizing the display of predetermined content or texture. Meanwhile, the main support is rotationally connected to the terminal, the main support can be driven to rotate 360° by rotating the shadow sphere cover, realizing the display of various external contents and the interface switching function, realizing the strong interaction between people and electronic products, enhancing the interestingness, novelty and interactivity of the electronic products, and filling the blank direction in the current market.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Fig. 1 is a perspective view of the rotating digital display device provided by the application;

[0027] Fig. 2 is a perspective view of the rotating digital display device shown in Fig. 1 with the shadow sphere cover hidden;

[0028] Fig. 3 is another perspective view of the rotating digital display device shown in Fig. 2 with the shadow sphere cover hidden;

[0029] Fig. 4 is an exploded perspective view of the rotating digital display device shown in Fig. 1;

[0030] Fig. 5 is a further exploded perspective view of the rotating digital display device shown in Fig. 4;

[0031] Fig. 6 is a schematic view of a flexible circuit board being wound around a main support;

[0032] Fig. 7 is a schematic view of the flexible circuit board being unwound from the main support;

[0033] Fig. 8 is an exploded perspective view of the main support and a battery;

[0034] Fig. 9 is a schematic view of the flexible circuit board being fully unwound and connected to the battery;

[0035] Fig. 10 is a perspective view of the battery.

[0036] Reference numerals in the drawings: 100, rotating digital display device;

[0037] 10, main support; 11, first end portion; 111, first limiting slot; 112, limiting support; 113, first accommodating slot; 12, second end portion; 121, second limiting slot; 122, second accommodating slot; 13, cylindrical surface; 131, first positioning pin; 132, second positioning pin;

[0038] 20, battery; 30, flexible circuit board; 301, limiting hole; 302, positioning slot; 31, light position; 32, first electrode conductive tab; 33, data port conductive tab; 34, second electrode conductive tab; 35, forward / reverse rotation detection conductive tab; 36, first terminal; 37, second terminal;

[0039] 40, light guide column; 401, avoiding hole; 41, first arc-shaped piece; 411, first connecting piece; 412, clamping column; 413, first positioning hole; 42, second arc-shaped piece; 421, second connecting piece; 422, clamping hole; 423, second positioning hole; 43, isolation piece;

[0040] 50, diaphragm; 60, shadow-casting ball cover; 61, first half ball cover; 611, first avoiding slot; 62, second half ball cover; 621, second avoiding slot.

[0041] DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and beneficial technical effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described in the present specification are merely for the purpose of explaining the present application and are not intended to limit the present application.

[0043] It should also be understood that the terms used herein are for the purpose of describing particular embodiments and are not intended to limit the application. As used in the specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0044] It should further be understood that the term "and / or" as used herein refers to any combination of one or more of the associated listed items, and all possible combinations, and includes these combinations.

[0045] In an embodiment of the present application, a rotary digital display device 100 is provided for mounting on a terminal electronic product such as an electronic cigarette, an electronic product, etc. to display predetermined content (e.g. time, numbers, etc.) or texture (e.g. weather signs, setting status, etc.) outwardly and switch the display interface, and facilitate the user to rotate and decompress when holding the electronic product, thereby improving the interest and interactivity of the product.

[0046] As shown in FIGS. 1-5, the rotary digital display device 100 comprises a main support 10, a battery 20, a flexible circuit board 30, a light guide column 40, a diaphragm 50 and a shadow ball cover 60.

[0047] In the present embodiment, the main support 10 is in a hollow cylindrical shape, which comprises a cylindrical surface 13 and a first end portion 11 and a second end portion 12 respectively arranged at two ends of the cylindrical surface 13. The first end portion 11 and the second end portion 12 can both be annular and have a radius slightly larger than that of the circle surrounded by the cylindrical surface 13. The first end portion 11 and the second end portion 12 are respectively used for rotationally and fittingly connected with the predetermined parts of the terminal. For example, the terminal is provided with a fixed groove for placing the entire rotary digital display device 100, and the upper and lower sides of the fixed groove are both provided with groove structures for the first end portion 11 and the second end portion 12 to extend into and rotationally fit, the first end portion 11 and the second end portion 12 are respectively clamped into the two groove structures and do not affect the rotation thereof.

[0048] Further, the edge of the first end portion 11 is provided with a ring of first limiting grooves 111, and the edge of the second end portion 12 is provided with a ring of second limiting grooves 121. The first limiting grooves 111 and the second limiting grooves 121 are respectively used for fitting with the predetermined parts of the terminal to dampen and limit the rotation angle of the main support 10. In combination with the above example, the upper and lower sides of the fixed groove are both provided with a hemispherical protrusion matching the shape of the first limiting grooves 111 or the second limiting grooves 121, which will prevent the main support 10 from continuing to rotate within a certain force when the hemispherical protrusion is clamped into a certain first limiting groove 111 or second limiting groove 121, thereby realizing the force feedback of the user when rotating the entire device.

[0049] In the embodiment of the present application, in combination with Figs. 8-10, the battery 20 is a cylindrical battery and is arranged in the main body bracket 10. Further, the first end portion 11 is provided with a limiting bracket 112 arranged between a circle of first limiting grooves 111, for limiting the action of the battery 20 extending out of the first end portion 11, i.e. the battery 20 can be inserted into the main body bracket 10 from the second end portion 12, and cannot extend out of the first end portion 11.

[0050] In the embodiment of the present application, in combination with Figs. 6, 7 and 9, the flexible circuit board 30 (FPC) is attached around the cylindrical surface 13 and is electrically connected with the battery 20. The flexible circuit board 30 contains various circuits, logics, principles, and predetermined positions are provided with lamp positions 31 for displaying predetermined contents or textures. That is, the flexible circuit board 30 is provided with a processor such as an IC, and predetermined contents (such as time, numbers, etc.) or textures (such as weather signs, setting states, etc.). The lamp positions 31 of the flexible circuit board 30 can display different contents or textures according to different instructions.

[0051] Specifically, the side of the flexible circuit board 30 close to the first end portion 11 is provided with a circle of first electrode conductive pads 32 and a circle of data port conductive pads 33 along the circumference. The first electrode conductive pads 32 and the data port conductive pads 33 are arranged in intervals and are electrically connected with one electrode (such as the positive electrode) of the battery 20. The data port conductive pads 33 are used for electrically connecting with the charging / communication interface of the electronic product terminal, for data transmission with the external terminal. The side of the flexible circuit board 30 close to the second end portion 12 is provided with a circle of second electrode conductive pads 34 and a circle of positive / negative rotation detection conductive pads 35 along the circumference. The second electrode conductive pads 34 and the positive / negative rotation detection conductive pads 35 are arranged in intervals and are electrically connected with the other electrode (such as the negative electrode) of the battery 20. The positive / negative rotation detection conductive pads 35 are used for detecting whether the current rotation of the main body bracket 10 is positive rotation or negative rotation, and the implementation principle and specific circuit structure can refer to the prior art, which is not limited here.

[0052] It should be noted that the first electrode conductive pads 32 and the second electrode conductive pads 34 are respectively electrically connected with the positive and negative electrodes of the battery 20 through the flying wire welding mode, for supplying power to the entire flexible circuit board 30. The data port conductive pads 33 and the positive / negative rotation detection conductive pads 35 are located inside the two electrode conductive pads and are electrically connected with the processor of the flexible circuit board 30. In addition, the above four conductive pads can all be copper sheets, and when the flexible circuit board 30 is wound on the cylindrical surface 13, the four conductive pads synchronously form a ring shape, so that no matter how the main body bracket 10 rotates, it will not affect the electrical connection with the battery 20 and the implementation of its corresponding functions. In addition, the battery 20 can also be electrically connected with the power-required components of the electronic product terminal through the first electrode conductive pads 32 and the second electrode conductive pads 34, thereby supplying power to these power-required components.

[0053] Further, the cylindrical surface 13 is provided with a first positioning pin 131 and a second positioning pin 132 in the radial direction. The flexible circuit board 30 is internally provided with a limiting hole 301 matched with the first positioning pin 131, and both side edges of the flexible circuit board 30 are provided with a semicircular positioning groove 302 when the flexible circuit board 30 is unfolded, and the positioning grooves 302 are grouped in pairs to jointly surround the circumferential side of the second positioning pin 132, so as to position the flexible circuit board 30 around the cylindrical surface 13, thereby improving the assembly precision and avoiding the sliding of the wound flexible circuit board 30 relative to the cylindrical surface 13.

[0054] Further, the flexible circuit board 30 is axially extended to form a first terminal 36 at a preset position close to the first end portion 11, the first end portion 11 is provided with a first accommodating groove 113 for the first terminal 36 to extend into, and the first terminal 36 is electrically connected with the positive or negative electrode of the battery 20; the flexible circuit board 30 is axially extended to form a second terminal 37 at a preset position close to the second end portion 12, the second end portion 12 is provided with a second accommodating groove 122 for the second terminal 37 to extend into, and the second terminal 37 is electrically connected with the negative or positive electrode of the battery 20.

[0055] In the embodiment of the present application, the light guide column 40 is internally hollow and has an upper and lower opening cylindrical cavity, and the shape of the cylindrical cavity is slightly larger than the shape of the flexible circuit board 30 when it is wound, so as to press the flexible circuit board 30 on the cylindrical surface 13. The light guide column 40 is also provided with avoiding holes 401 corresponding to the lamp positions 31, and the shapes of the avoiding holes 401 are consistent with the arrangement shape of the lamp positions 31, so as to be able to reflect and guide light.

[0056] Specifically, the light guide column 40 includes a first arc-shaped piece 41 and a second arc-shaped piece 42, both of which are semicircular. The two side edges of the first arc-shaped piece 41 are both perpendicularly extended outward to form a first connecting piece 411, and the two side edges of the second arc-shaped piece 42 are both perpendicularly extended outward to form a second connecting piece 421. The first connecting piece 411 is provided with a plurality of clamping columns 412, and the second connecting piece 421 is provided with a plurality of clamping holes 422 corresponding to the clamping columns 412, and the clamping columns 412 are used to be clamped with the corresponding clamping holes 422 to jointly surround the first arc-shaped piece 41 and the second arc-shaped piece 42 into a cylindrical cavity to cover and press the flexible circuit board 30.

[0057] Among them, the first arc-shaped piece 41 is provided with a first positioning hole 413 matched with the second positioning pin 132, and the second arc-shaped piece 42 is provided with a second positioning hole 423 matched with the first positioning pin 132, so as to accurately position the position of the light guide column 40 on the main body support 10, so that the avoiding holes 401 can be aligned with the lamp positions 31 of the flexible circuit board 30 when it is wound.

[0058] Further, the surface of the light guide column 40 away from the flexible circuit board 30 is provided with a plurality of isolation pieces 43 in the radial direction, the isolation pieces 43 are used to separate the surface of the light guide column 40 into a plurality of regions, forming a plurality of display interfaces, so that different types of content or textures can be displayed. Wherein, part of the isolation pieces 43 can be multiplexed with the first connecting piece 411 and the second connecting piece 421.

[0059] In the embodiment, the diaphragm 50 is attached to the side of the light guide column 40 away from the flexible circuit board 30, used to display the predetermined content or texture formed by the light emitted by the lamp site 31 through the avoidance hole 401, forming a content display area. Wherein, when the light guide column 40 is provided with isolation pieces 43, the number of diaphragms 50 is multiple, and is attached to the plurality of regions on the light guide column 40 one by one.

[0060] In the embodiment, the shadow sphere cover 60 is fixed on the main support 10 and is spaced around the diaphragm 50 to project and display the predetermined content or texture on the diaphragm 50, so that the display content can be enlarged, and the user can rotate and decompress conveniently.

[0061] Specifically, the shadow sphere cover 60 includes a first half sphere cover 61 and a second half sphere cover 62 which are buckled. The first half sphere cover 61 is provided with a semicircular first avoidance slot 611 near the two ends of the main support 10, and the second half sphere cover 62 is provided with a semicircular second avoidance slot 621 near the two ends of the main support 10. The first avoidance slot 611 and the second avoidance slot 621 on the same side together form a circle and are attached to the cylindrical surface 13 of the main support 10, and the first electrode conductive tab 32, the data port conductive tab 33, the second electrode conductive tab 34 and the forward and reverse detection conductive tab 35 are all located outside the shadow sphere cover 60, so as not to affect the electrical connection of these conductive tabs.

[0062] In summary, the rotating digital display device 100 provided by the application, the flexible circuit board 30 is pressed and wound on the cylindrical surface 13 of the main support 10 through the light guide column 40, so that when the lamp site 31 in the flexible circuit board 30 emits light, the light can pass through the avoidance hole 401 of the light guide column 40 and then be displayed on the diaphragm 50, and finally be projected on the shadow sphere cover 60, realizing the display of the predetermined content or texture. At the same time, the main support 10 is rotatably connected to the terminal, and the main support 10 can be rotated by 360° by rotating the shadow sphere cover 60, realizing the display of various contents and the interface switching function, realizing the strong interaction between people and electronic products, enhancing the interestingness, novelty and interactivity of electronic products, and filling the blank direction in the current market.

[0063] The application is not limited only to the embodiments described in the specification, and additional advantages and modifications will readily occur to those skilled in the art. The application in its broader aspects is therefore not limited to the specific details, representative apparatus, and illustrative examples shown and described herein. Accordingly, various modifications and improvements can be made to what has been described without departing from the scope and spirit of the following claims.

Claims

1. A rotating digital display device for mounting on a terminal, characterized in that, The utility model relates to a kind of terminal body support, including: Main support, the main support is hollow cylindrical, including cylindrical surface and respectively being set in the first end and the second end of the cylindrical surface;The first end and the second end are respectively used to rotate with the preset part of terminal and cooperate with connection; Battery, the battery is set in the main support; Flexible circuit board, the flexible circuit board is attached around the cylindrical surface, and is electrically connected with the battery;Predetermined position of the flexible circuit board is equipped with the lamp site for showing predetermined content or texture; Light guide column, the light guide column is hollow inside, to press the flexible circuit board on the cylindrical surface;The light guide column is also provided with the avoiding hole corresponding with the lamp site; Diaphragm, the diaphragm is attached to the side of the light guide column away from the flexible circuit board, for showing the predetermined content or texture formed by the light emitted by the lamp site through the avoiding hole; Shadow projection ball cover, the shadow projection ball cover is fixed on the main support and is spaced around the diaphragm, to project and show the predetermined content or texture on the diaphragm.

2. The rotating digital display device of claim 1, wherein, The light guide column includes first arc-shaped sheet and second arc-shaped sheet, which are both semicircular;The two side edges of the first arc-shaped sheet are both vertically extended outward to form first connecting pieces, and the two side edges of the second arc-shaped sheet are both vertically extended outward to form second connecting pieces;The first connecting pieces are provided with a plurality of clamping columns, and the second connecting pieces are provided with a plurality of clamping holes corresponding to the clamping columns, and the clamping columns are used to be clamped with the corresponding clamping holes to jointly enclose the first arc-shaped sheet and the second arc-shaped sheet into a cylindrical cavity to cover and press the flexible circuit board.

3. The rotating digital display device of claim 2, wherein the plurality of digits are arranged in a circle. The surface of the light guide column away from the flexible circuit board is provided with a plurality of isolation pieces along the radial direction, and the isolation pieces are used to separate the surface of the light guide column into a plurality of regions;The diaphragm is in a plurality of quantities and is attached to the plurality of regions one by one;Part of the isolation pieces can be reused with the first connecting pieces and the second connecting pieces.

4. The rotating digital display device of claim 2, wherein the plurality of digits are arranged in a circle. The cylindrical surface is provided with a first positioning pin and a second positioning pin in the radial direction;The inside of the flexible circuit board is provided with a limiting hole matched with the first positioning pin, and the two side edges of the flexible circuit board are both provided with a semicircular positioning groove when the flexible circuit board is unfolded, and the two positioning grooves are a group to jointly enclose the circumferential side of the second positioning pin.

5. The rotating digital display device of claim 4, wherein the plurality of digits are arranged in a circle. The first arc-shaped sheet is provided with a first positioning hole matched with the second positioning pin, and the second arc-shaped sheet is provided with a second positioning hole matched with the first positioning pin.

6. The rotating digital display apparatus of claim 1, wherein The first end is provided with a limiting support, and the limiting support is used to limit the action of the battery extending out of the first end.

7. The rotating digital display apparatus of claim 1, wherein the plurality of digits are arranged in a circle. The edge of the first end is provided with a first limiting groove, and the edge of the second end is provided with a second limiting groove;The first limiting groove and the second limiting groove are respectively used to cooperate with the preset component of the terminal to dampen and limit the rotation angle of the main support.

8. The rotating digital display apparatus of claim 1, wherein, The flexible circuit board is provided with a first electrode conductive tab and a data port conductive tab in a circle on one side near the first end portion; the first electrode conductive tab and the data port conductive tab are arranged in intervals and are electrically connected with one electrode of the battery; the flexible circuit board is provided with a second electrode conductive tab and a positive and negative detection conductive tab in a circle on one side near the second end portion; the second electrode conductive tab and the positive and negative detection conductive tab are arranged in intervals and are electrically connected with another electrode of the battery.

9. The rotating digital display apparatus of claim 8, wherein the plurality of digits are arranged in a circle. The flexible circuit board is provided with a first terminal formed by extending along the axial direction near a preset position of the first end portion; the first end portion is provided with a first accommodating groove for the first terminal to extend into; the first terminal is electrically connected with the positive electrode or the negative electrode of the battery; the flexible circuit board is provided with a second terminal formed by extending along the axial direction near a preset position of the second end portion; the second end portion is provided with a second accommodating groove for the second terminal to extend into; the second terminal is electrically connected with the negative electrode or the positive electrode of the battery.

10. The rotating digital display apparatus of claim 8, wherein the plurality of digits are arranged in a circle. The shadow projection ball cover comprises a first half ball cover and a second half ball cover which are buckled together; the first half ball cover is provided with a first avoiding groove in a semicircle near both ends of the main support; the second half ball cover is provided with a second avoiding groove in a semicircle near both ends of the main support; the first avoiding groove and the second avoiding groove are arranged on the cylindrical surface of the main support together and make the first electrode conductive tab, the data port conductive tab, the second electrode conductive tab and the positive and negative detection conductive tab located outside the shadow projection ball cover.

Images