A contactless encoder position sensing intelligent Rubik's cube ball axis and Rubik's cube

Abstract

The present invention provides a contactless encoder azimuth sensing intelligent Rubik's cube ball shaft and Rubik's cube, comprising: an upper shell and a lower shell engaged at the bottom of the upper shell, six rotating shafts are installed on the upper shell and the lower shell, and radial magnets are installed at the bottom of the rotating shafts; an intelligent control component installed between the upper shell and the lower shell, the intelligent control component includes a main control module and a battery module, the main control module includes an integrated FPC flexible board folded into a hexahedron, an azimuth sensing encoder chip is installed at the center of each face of the FPC flexible board, a main control SOC and a gyroscope chip are also installed on the FPC flexible board, and axis positioning magnets are installed on the eight end corners of the hexahedron FPC flexible board. The integrated FPC flexible board folded into a hexahedron is installed in the ball shaft, and a contactless encoder chip is used, which is coordinated with the axis magnetic force positioning, so that the positioning is more accurate, which greatly increases the controllability and adjustability of the intelligent Rubik's cube, avoids the life decline of the mechanical contact type, and the effective life can reach tens of millions of times.

Description

Technical Field

[0001] The invention relates to the technical field of magic cube, and in particular to a contactless encoder position sensing intelligent magic cube ball axis and a magic cube using the ball axis. Background Art

[0002] Since its advent, the Rubik's Cube has been popular all over the world because of its strong educational function for humans. The Rubik's Cube is easy to understand, changeable and flexible. In order to play it well, the player must be able to concentrate, think continuously, and not be impatient to gradually become proficient in it. In a sense, the Rubik's Cube has become a toy for special intellectual development and a toy for testing the player's intelligence level and maturity, thus attracting batches of players.

[0003] In the Rubik's Cube competition, a more complex Rubik's Cube is usually used as a competition prop. During the competition, the contestants need to rotate it quickly in order to complete the reordering of the Rubik's Cube in the shortest time. The traditional Rubik's Cube relies on the player's precise rotation when rotating, and the Rubik's Cube needs to be rotated 90 degrees each time, so that the Rubik's Cube is not easy to get stuck. The Rubik's Cube with magnetic positioning blocks will have magnetic attraction to allow the Rubik's Cube to be magnetically adsorbed at 90 degrees, and the positioning is more accurate.

[0004] However, the existing intelligent Rubik's Cube has the following defects:

[0005] 1) Smart Rubik's Cubes on the market have many electronic components and plastic parts, are heavy, have complex processes, are very expensive, and have inaccurate surface position sensing, which leads to consumers and smart restoration products making incorrect judgments, affecting the burst speed and restoration success rate, and affecting consumer experience.

[0006] 2) The surface encoding sensor mechanism of the smart Rubik's Cube products on the market is installed in the center cover. The center cover has no GES mechanical feel, has a complex structure, is costly, and cannot be repaired and maintained.

[0007] 3) All smart Rubik's Cube products on the market use wire welding and FPC flat wire welding, which has high welding costs, great quality risks, and messy wire layout.

[0008] 4) All smart cube products on the market use metal brush sensors, which will greatly affect the lifespan and feel, and cause product functions to fail or become disrupted. Summary of the invention

[0009] In view of the shortcomings of the prior art, the present invention proposes a contactless encoder azimuth sensing intelligent Rubik's Cube ball axis and Rubik's Cube. An integrated FPC flexible board folded into a hexahedron is installed in the ball axis. The six sensing surfaces of the FPC flexible board and a signal processing unit use a contactless encoder chip and cooperate with the axis magnetic positioning to achieve more precise positioning, which greatly increases the controllability and adjustability of the intelligent Rubik's Cube and avoids the life degradation of mechanical contact. The effective life can reach tens of millions of times.

[0010] To realize the above technical scheme, the present invention provides a contactless encoder azimuth sensing intelligent Rubik's cube ball axis, comprising: an upper shell, the upper shell is configured to be hemispherical, a rotating shaft is arranged on the top of the upper shell, four rotating shafts are arranged on the bottom end edge of the upper shell and are distributed in a circular array with the center of the upper shell as the center, and a radial magnet is installed on the inner bottom of each rotating shaft; a lower shell is snap-fitted to the bottom of the upper shell through a snap-fit ​​structure, the lower shell is also configured to be hemispherical, and a rotating shaft coaxial with the rotating shaft at the top of the upper shell is arranged at the bottom of the lower shell, A radial magnet is also installed at the inner bottom of the rotating shaft at the bottom of the lower shell; an intelligent control component is installed between the upper shell and the lower shell, and the intelligent control component includes a main control module and a battery module. The battery module is electrically connected to the main control module, and the main control module includes an integrated FPC flexible board folded into a hexahedron, and an azimuth sensing encoder chip is installed at the center of each face of the hexahedron FPC flexible board. The main control SOC and gyroscope chip are also installed on the FPC flexible board, and axis positioning magnets are installed on the eight end corners of the hexahedron FPC flexible board.

[0011] In the above technical solution, the ball shaft adopts the upper and lower hemispherical shell snap connection design, and the integrated structure fixes the axis, making the rotation more stable and smooth. Through the cooperation between the radial magnet installed at the bottom of the inner side of the rotating shaft and the axis positioning magnets on the eight end corners of the hexahedral FPC flexible board, during actual rotation, the rotating shaft does not need to rotate 90 degrees each time. When the rotating shaft only needs to rotate a certain angle, the magic cube can be magnetically adsorbed by magnetic force at 90 degrees, which is more accurate and can prevent the magic cube from getting stuck during rotation. The positioning sensing structure of the ball shaft adopts a structure that combines the rotating shaft radial magnet with the axis positioning magnet and the azimuth sensing encoder chip. The azimuth sensing encoder chip cooperates with the gyroscope chip to detect the rotation angle of the radial magnet inside the rotating shaft and convert it into an angle signal to identify the rotation angle of the magic cube. The detection time is 0.286 milliseconds and the accuracy is 2 degrees, which provides positioning guarantee for ultra-high-speed rotating magic cube detection. The integrated FPC flexible board integrates the six-sided azimuth sensing encoder chip, without the need for complex wire connections, which solves the problem of messy wiring in traditional smart magic cubes.

[0012] Preferably, the intelligent control component also includes an FPC flexible board upper fixing seat and an FPC flexible board lower fixing seat for installing the FPC flexible board, and the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat are assembled into a hexahedron through positioning column buckles, wherein the battery module is installed in the center of the hexahedron formed by the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat, and the FPC flexible board is assembled on the surface of the hexahedron formed by the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat, so as to facilitate the folding and fixation of the FPC flexible board.

[0013] Preferably, charging springs are provided on one side of the axis positioning magnet on the eight end corners of the hexahedral FPC flexible board, and the charging springs are electrically connected to the battery module to facilitate real-time power supply to the FPC flexible board.

[0014] Preferably, the battery module is a rechargeable lithium battery with a long working time and flexible and diverse charging methods.

[0015] Preferably, the FPC flexible board is also equipped with a Bluetooth communication module, which can be wirelessly connected to an external smart APP to facilitate the external output of data.

[0016] Preferably, a buckle is provided on the top of each rotating shaft to facilitate docking with the external center block.

[0017] Preferably, the present contactless encoder azimuth sensing intelligent magic cube ball axis also includes six GES center blocks respectively installed on six rotating shafts, the GES center block includes a center block seat, the center block seat is provided with a card slot that matches the buckle at the top of the rotating shaft, the center block seat and the rotating shaft are connected by snapping between the buckle and the card slot, a GES wheelbase particle is installed in the center block seat, the GES gear is fixed on the rotating shaft, the GES gear is inlaid and installed on the GES wheelbase particle, the upper cover is installed on the top of the center block seat and the GES gear and the GES wheelbase particle are covered in the center block seat. The rotating shaft adopts an integrated circular design, the circle passes through the ball shell, the center block seat, and the GES gear, and the parts all adopt straight body friction to reduce the gap after splitting, so that the axis rotation is more stable and reliable, and the parameters of the wheelbase, elastic force, etc. of each 6 gears are adjusted by tools. In actual work, the connection elastic force between the rotating shaft and the GES center block can be adjusted by rotating the GES gear, so as to better adjust the smoothness of the rotating shaft during the rotation process.

[0018] The present invention also provides a contactless encoder orientation sensing smart Rubik's Cube, comprising the above-mentioned smart Rubik's Cube ball axis, eight corner blocks and twelve edge blocks. Adjacent corner blocks, edge blocks and GES center blocks are connected by movable ears arranged on the corner blocks and edge blocks. The smart Rubik's Cube ball axis is spliced ​​into a regular hexahedron with the eight corner blocks and twelve edge blocks. The structural design of the smart Rubik's Cube ball axis makes rotation and force generation easier and smoother, making the entire Rubik's Cube mechanical functions and intelligent functions run more smoothly, improving user experience, and greatly improving product cost performance.

[0019] Preferably, the corner block comprises a corner block seat, in which a movable ear is installed, and a detachable cover body is covered on the corner block seat and covers the movable ear in the corner block seat.

[0020] The beneficial effects of the contactless encoder position sensing intelligent Rubik's cube ball axis and the Rubik's cube provided by the present invention are:

[0021] 1) The present invention adopts the design of the upper and lower hemispherical shell snap connection through the structural design of the intelligent Rubik's Cube ball axis, and the integrated structure fixes the axis, making the rotation more stable and smooth. Through the cooperation between the radial magnet installed at the bottom of the inner side of the rotating shaft and the axis positioning magnets on the eight end corners of the hexahedral FPC flexible board, during actual rotation, the rotating shaft does not need to rotate 90 degrees each time. When the rotating shaft only needs to rotate a certain angle, the Rubik's Cube can be magnetically adsorbed by the magnetic force at 90 degrees, which makes the positioning more accurate and prevents the Rubik's Cube from jamming during rotation.

[0022] 2) The present invention designs a ball axis positioning structure. The positioning sensing structure adopts a structure that combines a rotating axis radial magnet with an axis positioning magnet and an azimuth sensing encoder chip. The azimuth sensing encoder chip cooperates with a gyroscope chip to detect the rotation angle of the radial magnet inside the rotating axis and converts it into an angle signal, thereby identifying the rotation angle of the Rubik's Cube. The detection time is 0.286 milliseconds and the accuracy is 2 degrees, which provides positioning guarantee for ultra-high-speed rotating Rubik's Cube detection.

[0023] 3) The present invention adopts an integrated FPC flexible board to integrate the six-sided orientation sensing encoder chip, the main control SOC, the gyroscope chip, and the Bluetooth communication module. The integrated design brings convenience to the assembly and improves the reliability of the system. It also makes the orientation sensing encoder chip signal transmission speed fast, accurate, and without losing steps, and does not require complicated wire connections, which effectively solves the problem of messy wiring in traditional smart Rubik's Cubes.

[0024] 4) The present invention provides a contactless encoder position sensing smart Rubik's Cube, which is equipped with the above-mentioned smart Rubik's Cube ball axis to make the surface position sensing more accurate, the step loss rate is minimized, the parts are simplified, the assembly process is simplified, and the rotation force is easier and more comfortable, so that the mechanical functions and intelligent functions of the entire Rubik's Cube can run more smoothly, improve the user experience, and greatly improve the product cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the assembled three-dimensional structure of the intelligent Rubik's Cube ball axis in the present invention.

[0026] Figure 2 It is a schematic diagram of the explosion structure of the intelligent Rubik's Cube ball axis in the present invention.

[0027] Figure 3 It is a schematic diagram of the exploded structure of the intelligent control component in the present invention.

[0028] Figure 4 It is a schematic diagram of the assembled three-dimensional structure of the intelligent control component in the present invention.

[0029] Figure 5 It is a schematic diagram of the front structure of the FPC flexible board when it is unfolded in the present invention.

[0030] Figure 6 It is a schematic diagram of the reverse structure of the FPC flexible board when it is unfolded in the present invention.

[0031] Figure 7 It is a schematic block diagram of the control principle in the present invention.

[0032] Figure 8 It is a schematic diagram of the assembled three-dimensional structure of the ball shaft and the GES center in the present invention.

[0033] Fig. 9 It is a schematic diagram of the structural assembly of the Rubik's Cube in the present invention.

[0034] In the figure: 1. upper shell; 2. lower shell; 3. rotating shaft; 31. radial magnet; 32. buckle; 4. main control module; 41. FPC flexible board; 42. azimuth sensing encoder chip; 43. axis positioning magnet; 44. charging spring; 45. main control SOC; 46. gyroscope chip; 5. battery module; 6. upper fixing seat of FPC flexible board; 7. lower fixing seat of FPC flexible board; 8. GES center block; 81. center block holder; 82. GES wheelbase particle; 83. GES gear position; 84. upper cover; 9. corner block; 91. corner block seat; 92. movable ear; 93. cover body; 10. edge block. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1: A contactless encoder position sensing intelligent Rubik's cube ball axis.

[0037] Reference Figures 1 to 8 As shown, a non-contact encoder position sensing intelligent Rubik's cube ball axis includes:

[0038] The upper shell 1 is configured to be hemispherical, a rotating shaft 3 is disposed on the top of the upper shell 1, and four rotating shafts 3 are disposed on the bottom end edge of the upper shell 1 and are distributed in a circular array with the center of the upper shell 1 as the center. A radial magnet 31 is installed on the inner bottom of each rotating shaft 3, and a buckle 32 is disposed on the top of each rotating shaft 3 to facilitate docking with an external center block;

[0039] The lower shell 2 is snap-fitted to the bottom of the upper shell 1 through a snap-fit ​​structure. The lower shell 2 is also set to be hemispherical. A rotating shaft 3 coaxial with the rotating shaft 3 at the top of the upper shell 1 is set at the bottom of the lower shell 2. A radial magnet 31 is also installed at the inner bottom of the rotating shaft 3 at the bottom of the lower shell 2. The ball shaft adopts the snap-fit ​​connection design of the upper and lower hemispherical shells. The integrated structure fixes the axis, making the rotation more stable and smooth.

[0040] An intelligent control component installed between the upper shell 1 and the lower shell 2, the intelligent control component includes a main control module 4, a battery module 5, an FPC flexible board upper fixing seat 6 and an FPC flexible board lower fixing seat 7, the FPC flexible board upper fixing seat 6 and the FPC flexible board lower fixing seat 7 are assembled into a hexahedron through positioning column buckles, the battery module 5 is installed in the center of the hexahedron composed of the FPC flexible board upper fixing seat 6 and the FPC flexible board lower fixing seat 7, the battery module 5 is electrically connected to the main control module 4, the main control module 4 includes an integrated FPC flexible board 41 folded into a hexahedron, the FPC flexible board 41 is assembled on the hexahedron surface composed of the FPC flexible board upper fixing seat 6 and the FPC flexible board lower fixing seat 7, to facilitate the folding and fixing of the FPC flexible board 41, an azimuth sensing encoder chip 42 is installed at the center of each face of the hexahedron FPC flexible board 41, and a main control SOC 45 and a gyroscope chip 46 are also installed on the FPC flexible board 41, and the azimuth sensing encoder chip 42 cooperates with the gyroscope The chip 46 is used to detect the rotation angle of the radial magnet 31 inside the rotating shaft 3. The main control SOC 45 is used to convert the signal collected by the azimuth sensing encoder chip 42 into an angle signal, so as to identify the rotation angle of the Rubik's Cube. The eight end corners of the hexahedral FPC flexible board 41 are equipped with axis positioning magnets 43. The axis positioning magnet 43 is used to allow the rotating shaft 3 to be magnetically adsorbed at 90 degrees through magnetic attraction, so that the positioning is more accurate; the eight end corners of the hexahedral FPC flexible board 41 are all provided with charging springs 44 on one side of the axis positioning magnet 43. The charging springs 44 are electrically connected to the battery module 5, so as to provide power to the FPC flexible board 41 in real time. The battery module 5 is a rechargeable lithium battery with a long working time and flexible and diverse charging methods. The use of a rechargeable lithium battery can support continuous play for 10 hours and the standby time can be up to 2 months. The FPC flexible board 41 is also equipped with a Bluetooth communication module, which can be wirelessly connected to an external smart APP to facilitate the external output of data.

[0041] Reference Figure 8As shown, the contactless encoder orientation sensing intelligent Rubik's cube ball axis also includes six GES center blocks 8 respectively installed on the six rotating shafts 3, and the GES center block 8 includes a center block holder 81, and the center block holder 81 is provided with a slot matching the top buckle 32 of the rotating shaft 3, and the center block holder 81 and the rotating shaft 3 are connected by the engagement between the buckle 32 and the slot, and a GES wheelbase particle 82 is installed in the center block holder 81, and the GES gear 83 is fixed on the rotating shaft 3, and the GES gear 83 is embedded in the GES wheelbase particle 82, and the upper cover 84 is installed on the top of the center block holder 81 and covers the GES gear 83 and the GES wheelbase particle 82 in the center block holder 81. The rotating shaft 3 adopts an integrated circular design. The circle passes through the spherical shell, the center block seat 81, the GES wheelbase particle 82 and is connected to the GES gear 83. The parts all adopt straight body friction to reduce the gap after disassembly, making the axis rotation more stable and reliable. During actual work, the connection elasticity and wheelbase between the rotating shaft 3 and the GES center block 8 can be adjusted by rotating the GES gear 83, so as to better adjust the smoothness of the rotating shaft 3 during the rotation process.

[0042] The present invention adopts the design of the structure of the intelligent Rubik's Cube ball axis, the snap connection design of the upper and lower hemispherical shells, and the integrated structure fixes the axis, making the rotation more stable and smooth. And through the cooperation between the radial magnet 31 installed on the inner bottom of the rotating shaft 3 and the axis positioning magnet 43 on the eight end corners of the hexahedral FPC flexible board 41, during actual rotation, the rotating shaft 3 does not need to rotate 90 degrees each time. When the rotating shaft 3 only needs to rotate a certain angle, the Rubik's Cube can be magnetically adsorbed by the magnetic force at 90 degrees, and the positioning is more accurate. At the same time, it can prevent the rotating shaft 3 from getting stuck during the rotation process.

[0043] The present invention designs the ball axis positioning structure, and the positioning sensing structure adopts a structure combining the rotating shaft radial magnet 31 with the axis positioning magnet 43 and the azimuth sensing encoder chip 42. The azimuth sensing encoder chip 42 cooperates with the gyroscope chip 46 to detect the rotation angle of the radial magnet 31 inside the rotating shaft 3, and converts it into an angle signal, thereby identifying the rotation angle of the Rubik's Cube. The detection time is 0.286 milliseconds, and the accuracy is 2 degrees, which provides positioning guarantee for ultra-high-speed rotating Rubik's Cube detection. The integrated FPC flexible board 41 integrates the six-sided azimuth sensing encoder chip 42, the main control SOC45, the gyroscope chip 46 and the Bluetooth communication module. The integrated design brings convenience to assembly and improves the reliability of the system. It also makes the azimuth sensing encoder chip 42 signal transmission fast, accurate, and without losing steps, and does not require complex wire connections, which solves the problem of messy wiring in traditional smart Rubik's Cubes.

[0044] Embodiment 2: A contactless encoder position sensing intelligent Rubik's Cube.

[0045] Reference Figures 1 to 9 The invention discloses a contactless encoder orientation sensing smart Rubik's Cube, comprising the smart Rubik's Cube ball axis, eight corner blocks 9 and twelve edge blocks 10 as described in Example 1, wherein the corner block 9 comprises a corner block seat 91, and a movable ear 92 is installed in the corner block seat 91, a detachable cover body 93 covers the corner block seat 91 and covers the movable ear 92 in the corner block seat 91, adjacent corner blocks 9, edge blocks 10 and GES center block 8 are connected by movable ears 82 arranged on the corner blocks 9 and edge blocks 10, and the smart Rubik's Cube ball axis is spliced ​​with the eight corner blocks 9 and the twelve edge blocks 10 into a regular hexahedron.

[0046] The present invention provides a contactless encoder position sensing intelligent Rubik's Cube, which is equipped with the above-mentioned intelligent Rubik's Cube ball axis to make surface position sensing more accurate, reduce the step loss rate to a minimum, simplify parts and components, simplify the assembly process, and make rotational force easier and freer, so that the entire Rubik's Cube mechanical functions and intelligent functions run more smoothly, improve user experience, and greatly improve the product cost performance.

[0047] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A non-contact encoder position sensing intelligent Rubik's cube ball axis, characterized in that include: The upper shell is configured to be hemispherical, a rotating shaft is disposed on the top of the upper shell, and four rotating shafts are disposed on the bottom end of the upper shell and distributed in a circular array with the center of the upper shell as the center, and a radial magnet is installed on the inner bottom of each rotating shaft; A lower shell is snapped onto the bottom of the upper shell through a snap-fit ​​structure, the lower shell is also configured to be hemispherical, a rotating shaft coaxial with the rotating shaft at the top of the upper shell is configured at the bottom of the lower shell, and a radial magnet is also installed at the inner bottom of the rotating shaft at the bottom of the lower shell; An intelligent control component is installed between the upper shell and the lower shell, the intelligent control component includes a main control module and a battery module, the battery module is electrically connected to the main control module, the main control module includes an integrated FPC flexible board folded into a hexahedron, an orientation sensing encoder chip is installed at the center of each face of the hexahedron FPC flexible board, a main control SOC and a gyroscope chip are also installed on the FPC flexible board, and axial positioning magnets are installed on the eight end corners of the hexahedron FPC flexible board.

2. The contactless encoder position sensing intelligent Rubik's Cube ball axis according to claim 1, characterized in that: The intelligent control component also includes an FPC flexible board upper fixing seat and an FPC flexible board lower fixing seat for installing the FPC flexible board, and the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat are assembled into a hexahedron through positioning column buckles, wherein the battery module is installed in the center of the hexahedron formed by the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat, and the FPC flexible board is assembled on the surface of the hexahedron formed by the FPC flexible board upper fixing seat and the FPC flexible board lower fixing seat.

3. The contactless encoder position sensing intelligent Rubik's Cube ball axis according to claim 1, characterized in that: Charging springs are arranged on one side of the axis positioning magnet at the eight end corners of the hexahedral FPC flexible board, and the charging springs are electrically connected to the battery module.

4. The contactless encoder position sensing intelligent Rubik's Cube ball axis as claimed in claim 3, characterized in that: The battery module is a rechargeable lithium battery.

5. The contactless encoder position sensing intelligent Rubik's Cube ball axis as claimed in claim 2, characterized in that: A Bluetooth communication module is also installed on the FPC flexible board.

6. The contactless encoder position sensing intelligent Rubik's Cube ball axis according to claim 1, characterized in that: A buckle is arranged on the top of each rotating shaft.

7. The contactless encoder position sensing intelligent Rubik's Cube ball axis according to claim 6, characterized in that: It also includes six GES center blocks respectively installed on six rotating shafts, the GES center block includes a center block socket, the center block socket is provided with a slot matching the buckle at the top of the rotating shaft, the center block socket and the rotating shaft are connected by the snap-fit ​​connection between the buckle and the slot, a GES wheelbase particle is installed in the center block socket, the GES gear is fixed on the rotating shaft, the GES gear is inlaid on the GES wheelbase particle, and the upper cover is installed on the top of the center block socket and covers the GES gear and the GES wheelbase particle in the center block socket.

8. A contactless encoder position sensing intelligent cube, characterized in that: It comprises the intelligent Rubik's Cube ball axis as described in claim 7, eight corner blocks and twelve edge blocks, the adjacent corner blocks, edge blocks and GES center block are connected by movable ears arranged on the corner blocks and edge blocks, and the intelligent Rubik's Cube ball axis and the eight corner blocks and twelve edge blocks are spliced ​​into a regular hexahedron.

9. The contactless encoder position sensing intelligent cube according to claim 8, characterized in that: The corner block comprises a corner block seat, in which a movable ear is installed, and a detachable cover body is covered on the corner block seat and covers the movable ear in the corner block seat.

Images