Rotary digital display device

Abstract

The utility model discloses a rotary digital display device which comprises a main body support, a battery, a flexible circuit board, a light guide column, a diaphragm and a projection ball cover. The main body bracket comprises a cylindrical surface, a first end part and a second end part; the battery is arranged in the main body bracket; the flexible circuit board is attached to the cylindrical surface in a surrounding manner and is provided with a lamp position; an avoiding hole is formed in the light guide column; the diaphragm is attached to the light guide column; and the projection ball cover is used for projecting and displaying preset contents or textures on the diaphragm. According to the utility model, the display of predetermined contents or textures is realized. Meanwhile, the main body support is rotatably connected to the terminal in a matched mode, the main body support can be driven to rotate by 360 degrees by rotating the projection ball cover, the display and interface switching functions of various external contents are achieved, strong interaction between people and electronic products is achieved, interestingness, novelty and interactivity of the electronic products are enhanced, and the blank direction of the current market is filled.

Description

[Technical field]

[0001] The utility model relates to the technical field of digital tubes, in particular to a rotating digital display device. [Background technology]

[0002] At present, with the development of science and technology, more and more electronic terminal products, such as electronic cigarettes, electronic toys, etc., are equipped with display devices such as digital tubes to enhance the functions of electronic products. However, most of the existing digital tube industry is a conventional static display screen, the interaction between people and products is single, the display content is less, and the interest is low. In view of this, it is necessary to provide a rotating digital display device to overcome the above defects. [Contents of the utility model]

[0003] The purpose of the utility model is to provide a rotating digital display device, aiming to improve the problems of less display content, single interactivity and low interest of existing digital tubes, enhance the interest, novelty and interactivity of electronic products, and fill the current market gap.

[0004] In order to achieve the above object, the utility model provides a rotating digital display device for installation on a terminal, which includes:

[0005] The main body bracket is in the shape of a hollow cylinder, comprising a cylindrical surface and a first end and a second end respectively arranged at both ends of the cylindrical surface; the first end and the second end are respectively used for rotationally matching and connecting with a preset part of the terminal;

[0006] A battery, wherein the battery is disposed in the main frame;

[0007] A flexible circuit board, the flexible circuit board is attached and arranged around the cylindrical surface and is electrically connected to the battery; a light position for displaying predetermined content or texture is provided at a predetermined position of the flexible circuit board;

[0008] A light guide column, wherein the interior of the light guide column is hollow so as to press the flexible circuit board onto the cylindrical surface; the light guide column is also provided with avoidance holes corresponding to the lamp positions;

[0009] A diaphragm, the diaphragm being attached to a side of the light guide column away from the flexible circuit board, and being used to display predetermined content or texture formed by the light emitted by the lamp position passing through the avoidance hole;

[0010] A projection ball cover is fixed on the main support and surrounds the diaphragm at intervals to project and display predetermined content or texture on the diaphragm.

[0011] In a preferred embodiment, the light guide column includes a first arc-shaped piece and a second arc-shaped piece, both of which are semicircular; both side edges of the first arc-shaped piece extend vertically outward to form a first connecting piece, and both side edges of the second arc-shaped piece extend vertically outward 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 clamping holes corresponding to the clamping columns one by one, and the clamping columns are used to clamp with the corresponding clamping holes to enclose the first arc-shaped piece and the second arc-shaped piece together into a cylindrical cavity to cover and press the flexible circuit board.

[0012] In a preferred embodiment, a surface of the light guide column facing away from the flexible circuit board is provided with a plurality of isolation sheets along the radial direction, and the isolation sheets are used to divide the surface of the light guide column into a plurality of areas; the number of the membrane sheets is plural, and they are respectively attached and connected to the plurality of areas in a one-to-one correspondence; wherein some of the isolation sheets can be reused with the first connecting sheet and the second connecting sheet.

[0013] In a preferred embodiment, the cylindrical surface is provided with a radial first positioning pin and a second positioning pin; a limiting hole cooperating with the first positioning pin is provided inside the flexible circuit board, and semicircular positioning grooves are provided on both side edges of the flexible circuit board when it is unfolded, and the positioning grooves are grouped in pairs to jointly surround the circumference of the second positioning pin.

[0014] In a preferred embodiment, the first arc-shaped piece is provided with a first positioning hole that is matched and connected to the second positioning pin, and the second arc-shaped piece is provided with a second positioning hole that is matched and connected to the first positioning pin.

[0015] In a preferred embodiment, a limiting bracket is provided at the first end, and the limiting bracket is used to limit the movement of the battery extending out of the first end.

[0016] In a preferred embodiment, the edge of the first end is provided with a circle of first limiting grooves, and the edge of the second end is provided with a circle of second limiting grooves; the first limiting grooves and the second limiting grooves are respectively used to cooperate with preset components of the terminal to damp and limit the rotation angle of the main bracket.

[0017] In a preferred embodiment, a circle of first electrode conductive contacts and a circle of data port conductive contacts are circumferentially provided on one side of the flexible circuit board close to the first end; the first electrode conductive contacts are spaced apart from the data port conductive contacts and are electrically connected to one electrode of the battery; a circle of second electrode conductive contacts and a circle of forward and reverse rotation detection conductive contacts are circumferentially provided on one side of the flexible circuit board close to the second end; the second electrode conductive contacts are spaced apart from the forward and reverse rotation detection conductive contacts and are electrically connected to another electrode of the battery.

[0018] In a preferred embodiment, a first terminal is axially extended from a preset position of the flexible circuit board near the first end portion. A first receiving groove for the first terminal to extend into is formed at the first end portion. The first terminal is electrically connected to the positive or negative electrode of the battery. A second terminal is axially extended from a preset position of the flexible circuit board near the second end portion. A second receiving groove for the second terminal to extend into is formed at the second end portion. The second terminal is electrically connected to the negative or positive electrode of the battery.

[0019] In a preferred embodiment, the projection globe includes a first hemispherical cover and a second hemispherical cover which are buckled together. First avoidance grooves in a semicircular shape are formed at positions of the first hemispherical cover near both ends of the main body bracket. Second avoidance grooves in a semicircular shape are formed at positions of the second hemispherical cover near both ends of the main body bracket. The first avoidance grooves and the second avoidance grooves jointly surround the cylindrical surface of the main body bracket, and the first electrode conductive contact piece, the data port conductive contact piece, the second electrode conductive contact piece, and the forward and reverse rotation detection conductive contact piece are all located outside the projection globe.

[0020] The rotary digital display device provided by the present utility model presses and winds the flexible circuit board around the cylindrical surface of the main body bracket through a light guide column. Thus, when the lamp positions in the flexible circuit board emit light, the light can pass through the avoidance holes of the light guide column and then be displayed on the diaphragm, and finally projected on the projection globe, realizing the display of predetermined content or texture. At the same time, the main body bracket is rotationally and cooperatively connected to the terminal, and the projection globe can be rotated to drive the main body bracket to rotate 360°, realizing the display and interface switching functions of various external contents, achieving strong interaction between people and electronic products, enhancing the interestingness, novelty, and interactivity of the electronic products, and filling the current market blank direction.

Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a three-dimensional view of the rotary digital display device provided by the present utility model;

[0023] Figure 2 For Figure 1 The three-dimensional view of the rotary digital display device shown after the projection globe is hidden;

[0024] Figure 3 ForFigure 2 A three-dimensional view of the shown rotating digital display device from another angle after the mapping globe cover is hidden;

[0025] Figure 4 is Figure 1 A three-dimensional exploded view of the shown rotating digital display device;

[0026] Figure 5 is Figure 4 A further three-dimensional exploded view of the shown rotating digital display device;

[0027] Figure 6 A schematic diagram of the flexible circuit board wound around the main body bracket;

[0028] Figure 7 A schematic diagram of the flexible circuit board being gradually unfolded on the main body bracket;

[0029] Figure 8 A three-dimensional exploded view of the main body bracket and the battery;

[0030] Figure 9 A schematic diagram when the flexible circuit board is fully unfolded and connected to the battery;

[0031] Figure 10 A three-dimensional view of the battery.

[0032] Reference numerals in the figure: 100, rotating digital display device;

[0033] 10, main body bracket; 11, first end; 111, first limiting groove; 112, limiting bracket; 113, first receiving groove; 12, second end; 121, second limiting groove; 122, second receiving groove; 13, cylindrical surface; 131, first positioning pin; 132, second positioning pin;

[0034] 20, battery; 30, flexible circuit board; 301, limiting hole; 302, positioning groove; 31, lamp position; 32, first electrode conductive contact; 33, data port conductive contact; 34, second electrode conductive contact; 35, forward and reverse detection conductive contact; 36, first terminal; 37, second terminal;

[0035] 40, light guide column; 401, avoidance hole; 41, first arc-shaped piece; 411, first connecting piece; 412, clamping post; 413, first positioning hole; 42, second arc-shaped piece; 421, second connecting piece; 422, clamping hole; 423, second positioning hole; 43, isolation piece;

[0036] 50, diaphragm; 60, mapping globe cover; 61, first hemispherical cover; 611, first avoidance groove; 62, second hemispherical cover; 621, second avoidance groove.

Detailed implementation manner

[0037] In order to make the objectives, technical solutions, and beneficial technical effects of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for explaining the present utility model and are not intended to limit the present utility model.

[0038] It should also be understood that the terms used in this specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in this specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0039] It should be further understood that the term "and / or" used in this specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] In an embodiment of the present utility model, a rotary digital display device 100 is provided, which is used to be installed on terminal electronic products such as electronic cigarettes and electronic products to externally display predetermined content (such as time, numbers, etc.) or textures (such as weather signs, setting states, etc.), and can switch the display interface; at the same time, it is convenient for users to rotate when holding the electronic product, thereby relieving stress and enhancing the interest and interactivity of the product.

[0041] As Figures 1 - 5 shown, the rotary digital display device 100 includes: a main body bracket 10, a battery 20, a flexible circuit board 30, a light guide column 40, a diaphragm 50, and a mapping spherical cover 60.

[0042] In this embodiment, the main body bracket 10 is in a hollow cylindrical shape, which includes a cylindrical surface 13 and a first end portion 11 and a second end portion 12 respectively provided at both ends of the cylindrical surface 13. The first end portion 11 and the second end portion 12 may both be annular, and the radius is slightly larger than the radius of the circle enclosed by the cylindrical surface 13. The first end portion 11 and the second end portion 12 are respectively used for rotatably mating and connecting with preset parts of the terminal. For example, the terminal is provided with a fixed groove for placing the entire rotary digital display device 100, and groove structures for the first end portion 11 and the second end portion 12 to extend into and rotatably mate are respectively provided on the upper and lower sides of the fixed groove. The first end portion 11 and the second end portion 12 are respectively snapped into the two groove structures without affecting their own rotation.

[0043] Further, a first limiting groove 111 is provided around the edge of the first end portion 11, and a second limiting groove 121 is provided around the edge of the second end portion 12. The first limiting groove 111 and the second limiting groove 121 are respectively used to cooperate with preset components of the terminal to perform damping limiting on the rotation angle of the main body bracket 10. Combining the above example, hemispherical bumps adapted to the shape of the first limiting groove 111 or the second limiting groove 121 are provided on both the upper and lower sides of the fixed groove. When the hemispherical bump is inserted into a certain first limiting groove 111 or second limiting groove 121, it will prevent the main body bracket 10 from continuing to rotate within a certain force, realizing the force feedback when the user rotates the entire device.

[0044] In an embodiment of the present invention, in combination with Figures 8 - 10 , the battery 20 is a cylindrical battery and is disposed inside the main body bracket 10. Further, a limiting bracket 112 is provided at the first end portion 11. The limiting bracket 112 is disposed between a circle of first limiting grooves 111 and is used to limit the movement of the battery 20 extending out of the first end portion 11. That is, 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.

[0045] In an embodiment of the present invention, in combination with Figure 6 , Figure 7 and Figure 9 , the flexible circuit board 30 (FPC) is attached and surrounded on the cylindrical surface 13 and is electrically connected to the battery 20. The flexible circuit board 30 contains various circuits, logics, and principles, and lamp positions 31 for displaying predetermined contents or textures are provided at predetermined positions. That is, an IC and other processors, as well as predetermined contents (such as time, numbers, etc.) or textures (such as weather signs, setting states, etc.) are provided in the flexible circuit board 30. The lamp positions 31 of the flexible circuit board 30 can display different contents or textures according to different instructions.

[0046] Specifically, a circle of first electrode conductive contact pieces 32 and a circle of data port conductive contact pieces 33 are provided along the circumferential direction on one side of the flexible circuit board 30 close to the first end portion 11. The first electrode conductive contact pieces 32 and the data port conductive contact pieces 33 are arranged at intervals and are electrically connected to one electrode (such as the positive electrode) of the battery 20. The data port conductive contact pieces 33 are used to be electrically connected to the charging / communication interface of the electronic product terminal for data transmission with an external terminal. A circle of second electrode conductive contact pieces 34 and a circle of forward and reverse rotation detection conductive contact pieces 35 are provided along the circumferential direction on one side of the flexible circuit board 30 close to the second end portion 12. The second electrode conductive contact pieces 34 and the forward and reverse rotation detection conductive contact pieces 35 are arranged at intervals and are electrically connected to the other electrode (such as the negative electrode) of the battery 20. The forward and reverse rotation detection conductive contact pieces 35 are used to detect whether the current rotation of the main body bracket 10 is forward or reverse. The implementation principle and specific circuit structure can refer to the prior art and are not limited herein.

[0047] It should be noted that the first electrode conductive contact 32 and the second electrode conductive contact 34 are electrically connected to the positive and negative electrodes of the battery 20 respectively by means of flying wire welding, and are used to supply power to the entire flexible circuit board 30. The data port conductive contact 33 and the forward and reverse detection conductive contact 35 are located inside the two electrode conductive contacts and are electrically connected to the processor of the flexible circuit board 30. In addition, the above four conductive contacts can all be copper sheets, and when the flexible circuit board 30 is wound around the cylindrical surface 13, the four conductive contacts synchronously form a ring, so that no matter how the main body bracket 10 rotates, it will not affect the electrical connection with the battery 20 and the realization of its corresponding functions. In addition, the battery 20 can also be electrically connected to the power-consuming components of the electronic product terminal through the first electrode conductive contact 32 and the second electrode conductive contact 34, so as to supply power to these power-consuming components.

[0048] Furthermore, the cylindrical surface 13 is provided with a radial first positioning pin 131 and a second positioning pin 132. The flexible circuit board 30 is internally provided with a limiting hole 301 that cooperates with the first positioning pin 131. Semicircular positioning grooves 302 are formed on both side edges of the flexible circuit board 30 when it is unfolded. The positioning grooves 302 are grouped in pairs to jointly surround the circumference of the second positioning pin 132, so as to position the action of winding and assembling the flexible circuit board 30 on the cylindrical surface 13, improve the assembly accuracy, and at the same time avoid the sliding of the wound flexible circuit board 30 relative to the cylindrical surface 13.

[0049] Furthermore, a first terminal 36 extends axially from a preset position of the flexible circuit board 30 close to the first end 11. The first end 11 is provided with a first receiving groove 113 for the first terminal 36 to extend into, and the first terminal 36 is electrically connected to the positive or negative electrode of the battery 20; a second terminal 37 extends axially from a preset position of the flexible circuit board 30 close to the second end 12. The second end 12 is provided with a second receiving groove 122 for the second terminal 37 to extend into, and the second terminal 37 is electrically connected to the negative or positive electrode of the battery 20.

[0050] In the embodiment of the present utility model, the light guide column 40 is hollow inside and has a cylindrical cavity with openings at the top and bottom, 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 against the cylindrical surface 13. The light guide column 40 is also provided with avoidance holes 401 corresponding to the lamp positions 31, and the shapes of these avoidance holes 401 are consistent with the layout shapes of the lamp positions 31, so as to perform reflective light guiding.

[0051] 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. Both side edges of the first arc-shaped piece 41 extend vertically outward to form a first connecting piece 411, and both side edges of the second arc-shaped piece 42 extend vertically 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 clamping holes 422 corresponding to the clamping columns 412. The clamping columns 412 are used to clamp with the corresponding clamping holes 422 to enclose the first arc-shaped piece 41 and the second arc-shaped piece 42 together to form a cylindrical cavity to cover and press the flexible circuit board 30.

[0052] Among them, the first arc-shaped piece 41 is provided with a first positioning hole 413 that cooperates with the second positioning pin 132, and the second arc-shaped piece 42 is provided with a second positioning hole 423 that cooperates with the first positioning pin 132, so as to accurately position the position of the light guide column 40 on the main bracket 10, so that the avoidance hole 401 during assembly can be aligned with the lamp position 31 when the flexible circuit board 30 is wound.

[0053] Furthermore, a plurality of spacers 43 are radially disposed on the surface of the light guide column 40 facing away from the flexible circuit board 30, and the spacers 43 are used to separate the surface of the light guide column 40 into multiple areas to form multiple display interfaces, so that different types of content or textures can be displayed. Part of the spacers 43 can be reused with the first connecting sheet 411 and the second connecting sheet 421.

[0054] In the embodiment, the film 50 is attached to the side of the light guide column 40 away from the flexible circuit board 30, and is used to display the predetermined content or texture formed by the light emitted by the lamp position 31 passing through the avoidance hole 401, forming a content display area. Wherein, when the light guide column 40 is provided with a spacer 43, the number of the film 50 is multiple, and they are respectively attached and connected to the multiple areas on the light guide column 40 in a one-to-one correspondence.

[0055] In this embodiment, the projection ball cover 60 is fixed on the main frame 10 and surrounds the film 50 at intervals to project and display the predetermined content or texture on the film 50, so as to magnify the displayed content and facilitate the user to rotate and decompress.

[0056] Specifically, the projection ball cover 60 includes a first hemispherical cover 61 and a second hemispherical cover 62 that are interlocked. The first hemispherical cover 61 is provided with a first semicircular avoidance groove 611 at the position close to both ends of the main frame 10, and the second hemispherical cover 62 is provided with a second semicircular avoidance groove 621 at the position close to both ends of the main frame 10. The first avoidance groove 611 and the second avoidance groove 621 on the same side are jointly formed to form a circle, and fit around the cylindrical surface 13 of the main frame 10, and the first electrode conductive contact sheet 32, the data port conductive contact sheet 33, the second electrode conductive contact sheet 34, and the forward and reverse detection conductive contact sheet 35 are all located outside the projection ball cover 60, so as not to affect the electrical connection of these conductive contacts.

[0057] In summary, the rotating digital display device 100 provided by the utility model presses the flexible circuit board 30 around the cylindrical surface 13 of the main frame 10 through the light guide column 40, so that when the light position 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 projected on the projection ball cover 60, realizing the display of the predetermined content or texture. At the same time, the main frame 10 is rotatably connected to the terminal, and the projection ball cover 60 can be rotated to drive the main frame 10 to rotate 360°, realizing the display of multiple external contents and interface switching functions, realizing strong interaction between people and electronic products, enhancing the fun, novelty and interactivity of electronic products, and filling the current market gap.

[0058] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A rotary digital display device for installation on a terminal, characterized in that, include: The main body bracket is in the shape of a hollow cylinder, comprising a cylindrical surface and a first end and a second end respectively arranged at both ends of the cylindrical surface; the first end and the second end are respectively used for rotationally matching and connecting with a preset part of the terminal; A battery, wherein the battery is disposed in the main frame; A flexible circuit board, the flexible circuit board is attached and arranged around the cylindrical surface and is electrically connected to the battery; a light position for displaying predetermined content or texture is provided at a predetermined position of the flexible circuit board; A light guide column, wherein the interior of the light guide column is hollow so as to press the flexible circuit board onto the cylindrical surface; the light guide column is also provided with avoidance holes corresponding to the lamp positions; A diaphragm, the diaphragm being attached to a side of the light guide column away from the flexible circuit board, and being used to display predetermined content or texture formed by the light emitted by the lamp position passing through the avoidance hole; A projection ball cover is fixed on the main support and surrounds the diaphragm at intervals to project and display predetermined content or texture on the diaphragm.

2. The rotary digital display device according to claim 1, wherein The light guide column includes a first arc-shaped piece and a second arc-shaped piece, both of which are semicircular; both side edges of the first arc-shaped piece extend vertically outward to form a first connecting piece, and both side edges of the second arc-shaped piece extend vertically outward 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 clamping holes corresponding to the clamping columns one by one, and the clamping columns are used to clamp with the corresponding clamping holes to enclose the first arc-shaped piece and the second arc-shaped piece together into a cylindrical cavity to cover and press the flexible circuit board.

3. The rotary digital display device according to claim 2, wherein A plurality of isolation sheets are radially provided on the surface of the light guide column facing away from the flexible circuit board, and the isolation sheets are used to divide the surface of the light guide column into multiple areas; there are multiple membrane sheets, and they are respectively attached and connected to the multiple areas in a one-to-one correspondence; wherein some of the isolation sheets can be reused with the first connecting sheet and the second connecting sheet.

4. The rotary digital display device according to claim 2, characterized in that, The cylindrical surface is provided with a first radial positioning pin and a second radial positioning pin; a limiting hole cooperating with the first positioning pin is provided inside the flexible circuit board, and semicircular positioning grooves are provided on both side edges of the flexible circuit board when it is unfolded, and the positioning grooves are grouped in pairs to surround the circumference of the second positioning pin.

5. The rotary digital display device according to claim 4, characterized in that, The first arc-shaped piece is provided with a first positioning hole which is matched and connected with the second positioning pin, and the second arc-shaped piece is provided with a second positioning hole which is matched and connected with the first positioning pin.

6. The rotary digital display device according to claim 1, wherein, The first end portion is provided with a limiting bracket, and the limiting bracket is used to limit the movement of the battery extending out of the first end portion.

7. The rotary digital display device according to claim 1, wherein, The edge of the first end is provided with a circle of first limiting grooves, and the edge of the second end is provided with a circle of second limiting grooves; the first limiting grooves and the second limiting grooves are respectively used to cooperate with preset components of the terminal to damp and limit the rotation angle of the main bracket.

8. The rotary digital display device according to claim 1, wherein On one side of the flexible circuit board close to the first end, a circle of first electrode conductive contacts and a circle of data port conductive contacts are arranged circumferentially; the first electrode conductive contacts and the data port conductive contacts are arranged at intervals and are electrically connected to one electrode of the battery; on one side of the flexible circuit board close to the second end, a circle of second electrode conductive contacts and a circle of forward and reverse detection conductive contacts are arranged circumferentially; the second electrode conductive contacts and the forward and reverse detection conductive contacts are arranged at intervals and are electrically connected to the other electrode of the battery.

9. The rotary digital display device according to claim 8, characterized in that At a preset position of the flexible circuit board close to the first end, a first terminal extends axially, and a first receiving groove for the first terminal to extend into is formed at the first end, and the first terminal is electrically connected to the positive or negative electrode of the battery; at a preset position of the flexible circuit board close to the second end, a second terminal extends axially, and a second receiving groove for the second terminal to extend into is formed at the second end, and the second terminal is electrically connected to the negative or positive electrode of the battery.

10. The rotary digital display device according to claim 8, characterized in that, The projection ball cover includes a first hemispherical cover and a second hemispherical cover that are buckled together; at positions of the first hemispherical cover close to both ends of the main body bracket, semi-circular first avoidance grooves are formed, and at positions of the second hemispherical cover close to both ends of the main body bracket, semi-circular second avoidance grooves are formed. The first avoidance grooves and the second avoidance grooves jointly surround the cylindrical surface of the main body bracket, and the first electrode conductive contacts, the data port conductive contacts, the second electrode conductive contacts, and the forward and reverse detection conductive contacts are all located outside the projection ball cover.

Images