Hand drawing board

Abstract

The utility model provides a hand drawing board, which comprises a bottom shell, a top shell, a PCB (printed circuit board) and a plurality of touch switches arranged on the top surface of the PCB at intervals, the utility model relates to an integrated silica gel key, which comprises a key base, the silica gel key units are arranged on the top surface of the key base, and the peripheral sides of the bottom ends of the silica gel key units are connected to the top surface of the key base through first chamfered conical surfaces; the plurality of deformation cavities are arranged on the bottom surface of the key base and are connected to the silica gel key unit, and an elastic thin wall is formed between the deformation cavities and the first chamfered conical surface; the key base is arranged on the top surface of the PCB, and the deformation cavity covers the light touch switch; the receding through holes are formed in the top shell, and second chamfered conical surfaces matched with the first chamfered conical surfaces are formed in the connecting positions of the bottom ends of the receding through holes and the bottom surface of the top shell; the top shell and the bottom shell are in butt joint to form a shell, the top end of the silica gel key unit extends out of the receding through hole to the outside of the shell, and the first chamfered conical surface is in butt joint with the second chamfered conical surface. The integrated silica gel button can prevent the touch switch from losing efficacy due to elastic deformation deviation, and prevents the side edge from sinking due to elastic deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of digital hand-painted equipment, in particular to a hand-painted board. Background Art

[0002] With the gradual development of digital handwriting and hand-drawing technology and equipment, the target application group has expanded to professional animation and painting practitioners and the vast number of primary and secondary school students. These groups have high demands on the key comfort and equipment economy of digital handwriting and hand-drawing equipment.

[0003] Existing digital handwriting and hand-drawing devices (such as handwriting tablets and hand-drawing tablets) usually consist of a digital tablet and a pressure-sensitive pen. The touch switch that matches the digital tablet and the silicone button usually uses a small touch switch with a pressing force of about 90g and a diameter of 2mm. In order to meet the needs of different user groups, especially users with larger fingers, the diameter of the silicone buttons used in the industry is usually greater than 15mm to maintain the versatility and adaptability of the equipment; because the silicone buttons are relatively soft, there is elastic deformation when pressing the buttons, and the touch switches used in digital handwriting and hand-drawing devices have a smaller diameter. When the finger presses the side edge of the silicone button with a larger diameter, it is easy for the silicone button to deviate from the touch switch below due to elastic deformation, or the touch switch is not pressed in place, resulting in insufficient pressing force and failure to trigger the switch. In addition, when the finger presses the side edge of the silicone button, the silicone button is prone to deformation and depression, which will cause the subsequent pressing and triggering of the button to fail, affecting the user experience of digital handwriting and hand-drawing devices. At the same time, the silicone buttons of traditional handwriting tablets and drawing tablets usually adopt a combination structure of plastic buttons + silicone pads, which makes the product structure complex and the thickness increased, thereby increasing the production cost and process restrictions of the product. Utility Model Content

[0004] The utility model provides a hand-painted board to solve the technical problem in the prior art that silicone keys of hand-painted boards are easily deformed due to pressing the side edges, resulting in failure of press triggering.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] The utility model provides a hand-painted board, comprising:

[0007] bottom shell and top shell;

[0008] A PCB board is installed on the inner side of the top shell; a plurality of touch switches are arranged in sequence and spaced apart on the top surface of the PCB board;

[0009] Integrated silicone button, including:

[0010] A long strip-shaped key base; a plurality of silicone key units, which are arranged on the top surface of the key base in a protruding manner and at intervals in order to match the respective light touch switches, and the peripheral sides of the bottom ends of the silicone key units are connected to the top surface of the key base through a first chamfered cone surface; a plurality of deformable cavities, which are arranged on the bottom surface of the key base in order to match the respective silicone key units, and the tops of the deformable cavities are connected to the silicone key units, and an elastic thin wall connected between the bottom ends of the silicone key units and the top surface of the key base is formed between the deformable cavities and the first chamfered cone surface; the key base is installed on the top surface of the PCB board, and the deformable cavities are matched one by one to cover the outsides of the respective light touch switches;

[0011] A plurality of clearance through holes are sequentially arranged on the top shell at intervals to match the respective silicone key units, and the connection between the bottom end of the clearance through hole and the bottom surface of the top shell forms a second chamfered cone surface matching the first chamfered cone surface;

[0012] The top shell and the bottom shell are connected and assembled into a shell, and the tops of the silicone key units are matched to extend out of the respective clearance holes to the outside of the top of the shell, and the first chamfered cone surfaces are matched to the second chamfered cone surfaces.

[0013] Preferably, an arc-shaped groove with a lower middle and higher outer edge is provided in the middle of the top surface of the silicone key unit, and the position of the touch switch arranged on the top surface of the PCB board matches the arc-shaped groove.

[0014] Preferably, the silicone key unit is in the shape of a truncated cone, and the inner side surface of the clearance hole is an inclined conical surface that matches the outer side surface of the truncated cone of the silicone key unit. While the top end of the silicone key unit extends out of the clearance hole to the outside of the top of the shell, the outer side surface of the truncated cone of the silicone key unit abuts against the inner side surface of the clearance hole.

[0015] Preferably, the deformable cavity is in the shape of a truncated cone, and a cavity opening is formed at the connection between the bottom end of the deformable cavity and the bottom surface of the key base. The bottom surface of the key base is provided with a plurality of first exhaust grooves and second exhaust grooves. The first exhaust grooves are connected one-to-one between adjacent cavity openings, and the second exhaust grooves are connected between the cavity opening and the side of the key base.

[0016] Preferably, the touch switch is in a stepped shape with a narrower top and a wider bottom. The diameter of the top contact of the touch switch is 2 mm, the diameter of the silicone key unit is 15 mm, the diameter of the arc groove is 11 mm, the key thickness of the silicone key unit is 4 mm, and the pressing height of the bottom of the silicone key unit from the top surface of the PCB board is 2.5 mm.

[0017] Furthermore, the bottom shell and the top shell are both rectangular with rounded corners, an upper interface storage groove is provided at the bottom of one side periphery of the top shell, one end of the upper interface storage groove is deeper than the other end of the upper interface storage groove, an upper connector storage groove is provided at the bottom of the adjacent side periphery of the top shell where the upper interface storage groove is provided, and an upper wiring groove is provided at the bottom of the top shell, extending along the periphery of the top shell and connecting the upper connector storage groove and the upper interface storage groove;

[0018] A lower interface receiving groove mirror-matched with the upper interface receiving groove is provided at the top of one side periphery of the bottom shell, a lower connector receiving groove mirror-matched with the upper connector receiving groove is provided at the top of the adjacent side periphery of the bottom shell where the lower interface receiving groove is provided, and a lower wiring groove extending along the periphery of the bottom shell and connecting the lower connector receiving groove and the lower interface receiving groove is provided at the top of the bottom shell;

[0019] When the top shell and the bottom shell are butt-jointed and assembled into a housing, the upper interface storage groove and the lower interface storage groove form a T-shaped interface storage groove, the upper joint receiving groove and the lower joint receiving groove form a joint receiving groove, and the upper wiring groove and the lower wiring groove form a wiring storage groove;

[0020] The sketchpad also includes:

[0021] A data cable, comprising a tail end interface matching the shape of the interface receiving slot, a head end connector matching the shape of the connector receiving slot, and an elastic cable matching the shape of the wiring receiving slot and connected between the head end connector and the tail end interface;

[0022] The head end connector is fixedly installed in the connector receiving slot, and the elastic cable and the tail end interface can be correspondingly received in the wiring receiving slot and the interface receiving slot respectively.

[0023] Preferably, a plurality of upper pre-stressing ribs are arranged at intervals on the top surface of the upper wiring trough, and a plurality of lower pre-stressing ribs are arranged at intervals on the bottom surface of the lower wiring trough.

[0024] Preferably, the outer rubber layer of the data cable is made of TPE material.

[0025] Furthermore, the top surface of the top shell is provided with a flange extending around the top shell along the periphery of the top shell, and a mounting groove is formed between the flange and the top surface of the top shell, and a through hole is provided on the bottom surface of the mounting groove;

[0026] The sketchpad also includes:

[0027] A hand-painted lamination, the shape of which matches the shape of the mounting groove; a plurality of clearance openings, which match the clearance through holes and are sequentially arranged at intervals on the hand-painted lamination;

[0028] The hand-painted covering film is attached and installed in the installation groove, and the tops of the various silicone key units are matched one by one and sequentially extended out of the various clearance holes and the clearance openings to the outside of the top of the shell.

[0029] Preferably, a plurality of support seats are arranged at intervals on the inner side of the bottom shell, a plurality of connection holes are arranged at intervals on the PCB board, and a plurality of mounting holes matching the connection holes are arranged at intervals on the top shell;

[0030] The bottom end of the PCB board is supported on each support seat and is fixedly installed inside the shell by connecting screws passing through corresponding connecting holes and mounting holes.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] The hand-painted board provided by the utility model adopts an integrated silicone key composed of a key base and a plurality of silicone key units, so as to realize the seamless connection between the silicone key unit and the clearance through hole of the top shell. When the finger is pressed to the side edge of the silicone key unit due to the biased pressing during the key pressing process, the clearance through hole of the top shell and the bottom end of the key base are connected through the conical surface to realize the downward pressure guidance and side edge support of the silicone key unit, effectively preventing the silicone key unit from deviating from the touch switch below due to elastic deformation, causing trigger failure, and avoiding the subsequent pressing failure caused by the side edge of the silicone key unit sinking due to elastic deformation. At the same time, due to the use of an integrated silicone key with a simple structure, compared with the traditional plastic key + silicone pad combined key structure, the material use and processing are reduced, the production efficiency of the hand-painted board is improved and its cost is reduced, and the key comfort is improved and the key color selection is enriched. In addition, the data cable used in the hand-painted board is improved, while improving the data cable manufacturing yield, the data cable storage efficiency of the hand-painted board is improved, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solution proposed by the utility model, it is described in detail below in combination with the embodiments and drawings. It should be understood that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, these drawings can be changed under the concept of the utility model.

[0034] Figure 1 This is a schematic diagram of the overall assembly structure of an embodiment of the hand-painted board of the utility model;

[0035] Figure 2 for Figure 1 The overall exploded structure diagram of the hand-painted board in the figure;

[0036] Figure 3 for Figure 1 A schematic diagram of the top view structure of the hand-drawn board in FIG.

[0037] Figure 4 for Figure 1 A schematic diagram of the structure of the hand-drawn board viewed from above;

[0038] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of the hand-drawn board along the AA direction;

[0039] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure of the C area of ​​the hand-painted board;

[0040] Figure 7 for Figure 2 Schematic diagram of the three-dimensional structure of the integrated silicone button Figure 1 ;

[0041] Figure 8 for Figure 2 Schematic diagram of the three-dimensional structure of the integrated silicone button Figure 2 ;

[0042] Fig. 9 for Figure 1 The schematic diagram of the local three-dimensional structure after the data line is hidden on the hand-drawn board;

[0043] Fig.10 for Figure 1 A schematic diagram of a partial three-dimensional structure from another perspective after the data line is hidden on the hand-drawn board in the figure;

[0044] Fig.11 for Figure 1 Schematic diagram of the cross-sectional structure of the hand-drawn board along the BB direction;

[0045] Fig.12 for Fig.11 A schematic diagram of the local enlarged structure of the D area of ​​the hand-painted board;

[0046] Fig.13 for Figure 2 A schematic diagram of the three-dimensional structure of the data line in FIG.

[0047] Fig.14 for Fig.13 A schematic diagram of a partially enlarged structure of the data line from another perspective.

[0048] Among them, the main marks of the drawings in the figure are as follows:

[0049] 1. Bottom shell; 11. Support seat; 12. Lower fixing hole; 13. Rib; 131. Mounting slot; 132. Battery; 14. Button slide slot; 15. Lower connector receiving slot; 16. Lower wiring slot; 161. Lower pre-stressing rib; 17. Lower interface storage slot; 18. Silicone foot pad; 19. Make way; 2. PCB board; 21. Touch switch; 22. Switch base; 23. Bluetooth switch; 24. Connection hole; 241. Connection screw; 2 5. Switching knob; 251. Contact piece; 252. Slide rail; 3. Hand-painted lamination; 31. Make way opening; 32. Make way opening for rotating ring; 33. Make way opening for Bluetooth; 4. Integrated silicone button; 41. Button base; 411. Positioning hole; 42. Silicone button unit; 421. First chamfered cone surface; 422. Deformable cavity; 423. Elastic thin wall; 424. Arc groove; 425. Outer surface of truncated cone; 426. Cavity opening; 427 , first exhaust groove; 428, second exhaust groove; 5, top shell; 51, clearance hole; 511, second chamfered cone surface; 521, inclined cone surface; 52, flange; 53, mounting groove; 54, swivel clearance hole; 55, annular protrusion; 56, Bluetooth clearance hole; 57, mounting hole; 58, fixing screw; 59, upper wiring groove; 591, upper connector receiving groove; 592, upper interface storage groove; 593, upper pre-stressing rib; 6, shell; 61 , connector receiving slot; 62, wiring storage slot; 63, interface storage slot; 64, pen cover; 7, swivel assembly; 71, center button; 711, annular step; 72, button rubber pad; 73, roller knob; 731, center hole; 732, arc guide rail; 8, Bluetooth button; 81, button decorative ring; 811, annular flange; 82, button body; 9, data cable; 91, head end connector; 92, elastic cable; 93, tail end interface.

[0050] Among them, the other marks in the figure are as follows:

[0051] E, button thickness; H, pressing height. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-14 And embodiments, the utility model is further described in detail.

[0053] Please also read Figure 1-8 The hand-painted board provided in the utility model includes:

[0054] A bottom shell 1 and a top shell 5, the shape of the top shell 5 matches the bottom shell 1; a PCB board 2, installed on the inner side of the top shell 5; a plurality of light touch switches 21, arranged on the top surface of the PCB board 2 at intervals along an axis, and electrically connected to the circuit and the control unit of the hand-drawn board arranged on the PCB board 2 (not shown in the figure); an integrated silicone key 4, including: a long strip-shaped key base 41; a plurality of silicone key units 42, preferably made of silicone material, and other elastic plastic or rubber materials can also be used, which are arranged on the top surface of the key base 41 in sequence and at intervals to match each light touch switch 21, and the bottom peripheral side of the silicone key unit 42 is connected to the top surface of the key base 41 through a first chamfered cone surface 421; a plurality of deformable cavity 422, arranged on the bottom surface of the key base 41 to match each silicone key unit 42, and the deformable cavity 422 is arranged on the bottom surface of the key base 41 to match each silicone key unit 42. The top of the cavity 422 is connected to the bottom surface of the corresponding silicone key unit 42, the distance between the top peripheral side of the deformable cavity 422 and the first chamfered cone 421 is small, and the top peripheral side of the deformable cavity 422 is a chamfered cone that matches the shape of the first chamfered cone 421, so that an elastic thin wall 423 connected between the bottom end of the silicone key unit 42 and the top surface of the key base 41 is formed between the deformable cavity 422 and the first chamfered cone 421; the key base 41 is installed on the top surface of the PCB board 2, and the deformable cavities 422 on the bottom surface of the key base 41 cover the outside of each touch switch 21 one by one, so that each touch switch 21 is accommodated in the corresponding deformable cavity 422 while being surrounded by the corresponding silicone key unit 42, the elastic thin wall 423, the key base 41 and the PCB board 2.

[0055] The integrated silicone button 4 also includes:

[0056] A plurality of clearance through holes 51 are arranged on the top shell 5 in sequence and at intervals to match the respective silicone button units 42, and a second chamfered cone surface 511 matching the first chamfered cone surface 421 is formed at a connection between the bottom end of the clearance through hole 51 and the bottom surface of the top shell 5 facing the bottom shell 1; the top shell 5 and the bottom shell 1 are docked and combined to form a product shell 6 of the hand-drawn board, and the top ends of the respective silicone button units 42 are extended out of the clearance through holes 51 to the outside of the top of the shell 6 in a one-to-one matching manner, and at this time, the first chamfered cone surfaces 421 are docked with the second chamfered cone surfaces 511 in a one-to-one matching manner.

[0057] When the user presses the silicone key unit 42 with his finger, since the top of the elastic thin wall 423 on the peripheral side of the bottom end of the silicone key unit 42 is connected to the second chamfered cone 511 at the bottom end of the clearance hole 51 of the top shell 5 through the first chamfered cone 421 (that is, the peripheral side of the bottom end of the silicone key unit 42 and the peripheral side of the bottom end of the clearance hole 51 of the top shell 5 are connected without a drop), when the user's finger presses the side edge of the silicone key unit 42 due to the offset pressing, the second chamfered cone 511 at the bottom end of the clearance hole 51 of the top shell 5 can cooperate with the first chamfered cone 421 at the top end of the elastic thin wall 423 to effectively guide the silicone key unit 42 to press down and support the finger to press the silicone key unit 42, thereby preventing the silicone key unit 42 from deviating from the touch switch 21 below due to elastic deformation, causing trigger failure, and providing support for the side edge to prevent the side edge of the silicone key unit 42 from sinking due to elastic deformation, causing subsequent key pressing and trigger failure.

[0058] Please also read Figure 5-7 In this embodiment, the middle of the top surface of the silicone key unit 42 away from (facing away from) the key base 41 is provided with an arc groove 424 with a lower middle and a higher outer edge, that is, the center of the arc groove 424 is the lowest point, and the height gradually increases from the center to the outer edge until the outer periphery of the arc groove 424 is connected with the top surface of the key base 41. The position where the touch switch 21 is set on the top surface of the PCB board 2 matches the arc groove 424.

[0059] Please also read Figure 5-7 As a preferred implementation of this embodiment, the silicone key unit 42 is in a truncated cone shape, and the periphery of the top surface of the silicone key unit 42 adopts a chamfered transition; the deformable cavity 422 is in a truncated cone shape that matches the silicone key unit 42; the touch switch 21 is in a stepped shape with a narrower top and a wider bottom, the diameter of the top contact of the touch switch 21 is 2mm, the diameter of the silicone key unit 42 is 15mm, the diameter of the arc groove 424 is 11mm, the key thickness E of the silicone key unit 42 is 4mm, and the pressing height H from the bottom of the silicone key unit 42 to the top surface of the PCB board 2 is 2.5mm.

[0060] Since the middle part of the top surface of the silicone silicone key unit 42 is an arc-shaped groove 424 with a lower middle and higher outer edges, and the top surface periphery of the silicone key unit 42 adopts a chamfered transition, the cross-section of the top pressing area of ​​the silicone key unit 42 is an M-shaped area with a lower middle and higher sides. The middle arc-shaped groove 424 of the M-shaped area can play a role in assisting finger pressing guidance when pressing, and its effective pressing diameter is 11mm. With the cooperation of the above-mentioned second chamfered cone surface 511 and the first chamfered cone surface 421, the finger pressing force is further guided and gathered to the top contact of the touch switch 21 directly below the M-shaped area, thereby further avoiding the trigger failure caused by the silicone key unit 42 deviating from the touch switch 21 below due to elastic deformation.

[0061] Please also read Figure 5-8 In the present embodiment, the silica gel key unit 42 is in the shape of a truncated cone, and the outer side surface 425 of the truncated cone of the silica gel key unit 42 is an inclined conical surface 521, and the bottom end of the inclined conical surface 521 is connected to the top of the first chamfered conical surface 421 on the peripheral side of the bottom end of the silica gel key unit 42; the inner side surface of the yielding through hole 51 is an inclined conical surface 521 matching the outer side surface 425 of the truncated cone of the silica gel key unit 42, and the top of each silica gel key unit 42 extends out of the yielding through hole 51 to the outer side of the top of the shell 6, and each first chamfered conical surface 421 is matched with each second chamfered conical surface 511 one by one, and the outer side surface 425 of the truncated cone of each silica gel key unit 42 abuts against the inner side surface of the corresponding yielding through hole 51, so that the outer side surface and the peripheral side of the bottom end of the silica gel key unit 42 are connected to the corresponding yielding through hole 51 of the top shell 5. The inner side surface and the bottom peripheral side of the through hole 51 are integrally connected without any drop. When the user's finger presses the side edge of the silicone key unit 42 due to the offset pressing, on the one hand, the second chamfered cone surface 511 at the bottom of the through hole 51 of the top shell 5 cooperates with the first chamfered cone surface 421 at the top of the elastic thin wall 423, and on the other hand, the outer side surface 425 of the truncated cone of the silicone key unit 42 cooperates with the inner side surface of the through hole 51 to further enhance the guidance of the silicone key unit 42 and support the finger's pressing on the silicone key unit 42, thereby further preventing the silicone key unit 42 from deviating from the touch switch 21 below due to elastic deformation, causing trigger failure, and further avoiding the side edge of the silicone key unit 42 from sinking due to elastic deformation, causing subsequent key pressing and trigger failure.

[0062] See also Figure 5 , 6 In this embodiment, in order to meet the key thickness E and elastic deformation requirements of the silicone silicone key unit 42, on the basis of the above-mentioned pressing height H reaching 2.5 mm, the silicone material hardness used in the silicone silicone key unit 42 is 65 degrees, so as to improve the overall strength of the silicone silicone key unit 42 while maintaining its comfort of use.

[0063] Please also read Figure 1-3 , 5, 6-8, in the present embodiment, five touch switches 21 are provided, and the five touch switches 21 are arranged in sequence along an axis at even intervals on the top surface of the PCB board 2; the silicone key unit 42 of the integrated silicone key 4 and its elastic thin wall 423 and deformable cavity 422 are also evenly spaced and matched with the touch switches 21, and the make way through holes 51 of the top shell 5 are evenly spaced and matched with the silicone key unit 42.

[0064] In other embodiments, the number of the touch switch 21 , the silicone key unit 42 and its elastic thin wall 423 , the deformable cavity 422 and the clearance hole 51 may also be 3-4 or more than 5.

[0065] Since the hand-painted board provided by the utility model adopts an integrated key with multiple 15mm large-diameter pure silicone key units 42, the pure silicone key unit 42 and the key base 41 are integrally formed, so that each silicone key unit 42 is more richly and flexibly configured in color selection and combination, and at the same time meets the performance requirements of different user groups for key comfort, economy and durability (service life).

[0066] Please also read Figure 5-8 In this embodiment, the deformable cavity 422 is in a truncated cone shape, and a cavity opening 426 is formed at the connection between the bottom end of the deformable cavity 422 and the bottom surface of the key base 41. A plurality of first exhaust grooves 427 and second exhaust grooves 428 are provided on the bottom surface of the key base 41, wherein the first exhaust grooves 427 are connected one by one between adjacent cavity openings 426, and the second exhaust grooves 428 are connected between the cavity openings 426 and the side surface of the key base 41. The first exhaust grooves 427 and the second exhaust grooves 428 are arranged around the deformable cavity 422 to achieve exhaust and ventilation between the deformable cavity 422 and the internal space of the housing 6 and between adjacent deformable cavities 422, thereby improving the heat dissipation effect of the touch switch 21 and the circuit installed between the deformable cavity 422 and the PCB board 2. In addition, when the user presses the silicone key unit 42 with his fingers, the first exhaust groove 427 and the second exhaust groove 428 can cause the key base 41 to produce a certain elastic deformation at the corresponding position, and automatically restore the shape elastically after the fingers are released, further preventing the side edge of the silicone key unit 42 from sinking due to elastic deformation.

[0067] See also Figure 7 , 8 In this embodiment, a plurality of positioning posts (not shown in the figure) are arranged at intervals on the inner surface (inner bottom surface) of the top shell 5, and the key base 41 is provided with a plurality of positioning holes 411 matching the positioning posts. The key base 41 is fixedly installed between the top surface of the PCB board 2 and the inner surface of the top shell 5 through the positioning holes 411 corresponding to the positioning posts one by one.

[0068] See also Figure 1-3 , 5, 6. In the present embodiment, the top surface of the top shell 5 is provided with a flange 52 extending around the top shell 5 along the periphery of the top shell 5, and a mounting groove 53 is formed between the flange 52 and the top surface of the top shell 5, and a clearance through hole 51 is provided on the bottom surface of the mounting groove 53; the hand-painted board also includes: a hand-painted film 3, the shape of which matches the shape of the mounting groove 53; a plurality of clearance openings 31, which are arranged on the hand-painted film 3 in sequence and at intervals in a one-to-one manner to match each of the clearance through holes 51; the hand-painted film 3 is attached and installed in the mounting groove 53, and the top ends of each of the silicone key units 42 are extended out of each of the clearance through holes 51 and the clearance openings 31 in a one-to-one manner to the outside of the top of the shell 6.

[0069] As a preferred implementation of this embodiment, the hand-painted film 3 is used as an interactive touch display screen of the hand-painted board, that is, the hand-painted film 3 is a digital board display interface area for handwriting and drawing. The five silicone key units 42 respectively control the functions of the five touch switches 21 triggered to correspond to: controlling the canvas movement, canvas rotation, pen width increase, pen width decrease and command cancellation of the hand-painted film 3 display interface.

[0070] Please also read Figure 1-3 In this embodiment, the hand-drawing board also includes:

[0071] The switch base 22 is arranged on the top surface of the PCB board 2 and is electrically connected to the circuit arranged on the PCB board 2 and the control unit of the hand-drawn board; the rotating ring assembly 7 includes: a center button 71, a rubber pad groove (not shown in the figure) is provided in the middle of the bottom surface of the center button 71, a key rubber pad 72 is embedded in the rubber pad groove, the center button 71 is installed on the top of the switch base 22 through the key rubber pad 72, and the pressing feel and comfort of the center button 71 can be adjusted through the key rubber pad 72; the top surface periphery of the center button 71 is provided with an annular step 711 extending around the circumference of the center button 71; the roller knob 73, the middle of the roller knob 73 is provided with a center hole 731 matching the shape of the center button 71, and the middle of the roller knob 73 is provided with a center hole 731 matching the shape of the center button 71 The hole 731 cooperates with the annular step 711 to be rotatably mounted on the center button 71; the periphery of the bottom surface of the roller knob 73 is provided with an arc guide rail 732 extending around the circumference of the roller knob 73; the swivel clearance hole 54 is arranged on the top shell 5 to match the center button 71 and the roller knob 73, and the swivel clearance hole 54 is connected to the top peripheral side of the top surface of the top shell 5 and is provided with an annular protrusion 55 matching the arc guide rail 732, and the peripheral side of the roller knob 73 is rotatably mounted on the swivel clearance hole 54 through the arc guide rail 732 and the annular protrusion 55; the hand-painted film 3 is provided with a swivel clearance opening 32 matching the swivel clearance hole 54, and the center button 71 and the roller knob 73 extend out of the swivel clearance opening 32 to the outside of the top of the shell 6.

[0072] As a preferred implementation scheme of this embodiment, the center button 71 is made of PC plastic material, and the function of the corresponding contact point of the switch base 22 triggered by the center button 71 is to control the canvas / brush switching of the hand-painted film 3 display interface; the roller knob 73 is made of plastic surface vacuum-plated material, and the function of the corresponding contact point of the switch base 22 triggered by the roller knob 73 is to control the canvas / brush of the hand-painted film 3 display interface to zoom in or out.

[0073] Please also read Figure 1-3 In this embodiment, the hand-drawing board also includes:

[0074] The Bluetooth switch 23 is arranged on the top surface of the PCB board 2 and is electrically connected to the circuit arranged on the PCB board 2 and the control unit of the hand-drawn board; the Bluetooth button 8 includes: a button decoration ring 81, the bottom end of which is provided with an annular flange 811 extending around the circumference of the button decoration ring 81; a button body 82, the shape of which matches the shape of the hollow inner part of the button decoration ring 81; a Bluetooth clearance hole 56, which is arranged on the top shell 5 to match the button decoration ring 81 and the button body 82 The Bluetooth clearance hole 56 is connected to the bottom end of the bottom surface of the top shell 5, and an annular countersunk groove (not shown in the figure) matching the annular flange 811 is provided on the peripheral side. The bottom end of the button decorative ring 81 is fixedly installed on the Bluetooth clearance hole 56 through the annular flange 811 and the annular countersunk groove. The button body 82 is installed on the hollow inner side of the button decorative ring 81; the hand-painted film 3 is provided with a Bluetooth clearance port 33 matching the Bluetooth clearance hole 56, and the button decorative ring 81 and the button body 82 extend out of the Bluetooth clearance port 33 to the outside of the top of the shell 6.

[0075] As a preferred implementation of this embodiment, the button body 82 is made of PC plastic material. The function of the corresponding contact of the Bluetooth switch 23 triggered by the button body 82 is to control the wireless Bluetooth connection of the hand-drawing board, that is, to control the opening and closing of the Bluetooth module of the hand-drawing board (not shown in the figure) through the control unit; the button decorative ring 81 is made of plastic surface vacuum-plated material, which is used to realize the pressing stroke limit of the button body 82 and the display interface decoration of the hand-drawn board product hand-drawn coating 3.

[0076] Please also read Figure 1 , 2 , 5, 6. In the present embodiment, a plurality of support seats 11 are arranged at intervals on the inner side of the bottom shell 1, a plurality of connection holes 24 are arranged at intervals on the PCB board 2, and a plurality of mounting holes 57 matching the connection holes 24 are arranged at intervals on the top shell 5; the bottom end of the PCB board 2 is supported on each support seat 11, and is fixedly installed inside the shell 6 and located on the inner side of the top shell 5 by connecting screws 241 passing through the corresponding connection holes 24 and mounting holes 57, thereby assembling the bottom shell 1, the PCB board 2 and each touch switch 21, the integrated silicone button 4 and the top shell 5 into a hand-painted board product.

[0077] See also Figure 1 , 2 In this embodiment, the bottom shell 1 is provided with a plurality of lower fixing holes 12 at intervals, and the top shell 5 is provided with a plurality of upper fixing holes (not shown in the figure) that match the lower fixing holes 12 at intervals. The top shell 5 is fixedly docked to the bottom shell 1 by fixing screws 58 that pass through the corresponding upper fixing holes and the lower fixing holes 12, thereby assembling to form a shell 6 that wraps the PCB board 2 and each touch switch 21 and the integrated silicone button 4 in its internal accommodating space.

[0078] In this embodiment, the top shell 5 is preferably made of ABS+PC plastic material.

[0079] In this embodiment, the PCB board 2 preferably adopts PCBA, and the above-mentioned control unit and Bluetooth module are preferably installed on the PCB board 2, so that the various electrical units and circuit modules of the PCB board 2 can cooperate with the integrated buttons to realize the digital interactive handwriting and hand-drawing functions of the hand-drawing board, and realize signal transmission with mobile phones, tablets, computers and other smart terminals through wireless Bluetooth or data cable 9 (wired connection) to complete data interaction.

[0080] See also Figure 1 , 2 In this embodiment, a plurality of crisscross ribs 13 are provided on the inner side of the bottom shell 1, and the plurality of ribs 13 divide the inner side of the bottom shell 1 into a plurality of mounting grooves 131. The battery 132 of the hand-drawn board is installed in one of the mounting grooves 131 matching the shape of the battery 132. The battery 132 is used to provide power for various electrical units and circuit modules of the PCB board 2 and wireless Bluetooth interaction.

[0081] Please also read Figure 1 , 2 4. In this embodiment, the hand-drawing board also includes:

[0082] The switch (not shown in the figure) is arranged on the bottom surface of the PCB board 2 and is electrically connected to the circuit arranged on the PCB board 2 and the control unit of the hand-drawn board; the switch dial button 25 is provided with a contact 251 and a slide rail 252 connected to the corresponding contact of the switch, and the bottom shell 1 is provided with a button slide groove 14 matching the slide rail 252 and a clearance channel 19 for the contact 251 to extend into the shell 6. As a preferred implementation of this embodiment, the function of the corresponding contact of the switch triggered by the switch dial button 25 is to realize the switching of the mobile phone / tablet / computer of the hand-drawn board interactive device.

[0083] In addition to improving the key structure of the hand-drawn tablet, the utility model also aims to provide solutions to the following problems:

[0084] With the expansion and changes of application groups, interactive devices, and scenarios, digital handwriting and hand-drawing devices have also evolved from early external device power supply and wired signal transmission to self-powered devices and wired / wireless signal transmission. In the process, the function of the supporting data cable 9 has also changed (the early power-on data transmission is adjusted to the later charging / data transmission), but the data cable 9 has always been a standard accessory for handwriting tablets and hand-drawing tablets. Due to the functional requirements of connecting interactive devices (connecting with mobile phones, computers and hand-drawing operation requirements), the length of the data cable 9 of handwriting tablets and hand-drawing tablets is usually not less than 280mm. In order to meet the manufacturing requirements of the data cable 9 at this length, the silicone rubber hot pressing molding solution that is suitable for shorter data cables 9 is excluded. Usually, the cable is formed by one-time wire drawing, and then the head end connector 91 and the tail end interface 93 of the data cable 9 are formed twice.

[0085] Traditional handwriting tablets and hand-painted tablets have supporting data cables 9 that are separated from the handwriting tablets and hand-painted tablets and configured separately, and the data cables 9 are easy to lose; some handwriting tablets and hand-painted tablets have a card slot at the bottom of their product shell 6 along the edge of the shell 6. In order to accommodate the longer data cable 9, the two ends of the card slot correspond to a pair of adjacent corners that bypass the bottom surface of the shell 6, so that the card slot is U-shaped as a whole. This U-shaped card slot requires the longer data cable 9 to be pressed and inserted into the corresponding position in the extension direction of the card slot at various locations in the length direction. When taking out the data cable 9, it is also necessary to loosen the various locations of the U-shaped card slot and pull out the data cable 9 at various locations, which is very inconvenient to use. In addition, in the process of repeatedly pressing to store and pull out the data cable 9, the data cable 9 is prone to local bulging or wire core welding / stress end breakage.

[0086] Please also read Figure 1-4 , 9-14, for this reason, in the present embodiment, the bottom shell 1 and the top shell 5 are both rectangular with rounded corners, an upper interface receiving groove 592 is provided at the bottom of one side of the periphery of the top shell 5, one end of the upper interface receiving groove 592 is deeper than the other end of the upper interface receiving groove 592, an upper joint receiving groove 591 is provided at the bottom of the adjacent side periphery of the top shell 5 where the upper interface receiving groove is provided, and an upper wiring groove 59 is provided at the bottom of the top shell 5, extending along the periphery of the top shell 5 and connecting the upper joint receiving groove 591 and the deeper end of the upper interface receiving groove 592, that is, the upper wiring groove 59 is connected between adjacent sides of the top shell 5, and the upper wiring groove 59 is only bent at a rounded transition through the top shell 5;

[0087] A lower interface receiving groove 17 mirror-matched with the upper interface receiving groove 592 is provided at the top of one side periphery of the bottom shell 1, a lower connector receiving groove 15 mirror-matched with the upper connector receiving groove 591 is provided at the top of the adjacent side periphery of the bottom shell 1 where the lower interface receiving groove 17 is provided, and a lower wiring groove 16 extending along the periphery of the bottom shell 1 and connecting the lower connector receiving groove 15 and the deeper end of the lower interface receiving groove 17 is provided at the top of the bottom shell 1, that is, the lower wiring groove 16 is connected between adjacent sides of the bottom shell 1, and the lower wiring groove 16 is only bent at a rounded transition point passing through the bottom shell 1;

[0088] When the top shell 5 and the bottom shell 1 are docked and combined into the shell body 6, the upper interface receiving groove 592 and the lower interface receiving groove 17 form a T-shaped interface receiving groove 63, the upper joint accommodating groove 591 and the lower joint accommodating groove 15 form a joint accommodating groove 61, the upper wiring groove 59 and the lower wiring groove 16 form a wiring receiving groove 62, and the wiring receiving groove 62 is only bent at a rounded corner transition point of the shell body 6, and the parts at both ends of the wiring receiving groove 62 at its only bending position are horizontally extended perpendicular to each other.

[0089] The sketchpad also includes:

[0090] The data cable 9 includes a tail end interface 93 matching the shape of the interface receiving groove 63, a head end connector 91 matching the shape of the connector receiving groove 61, and an elastic cable 92 matching the shape of the wiring receiving groove 62 and connected between the head end connector 91 and the tail end interface 93; the head end connector 91 is fixedly installed in the connector receiving groove 61 for electrical connection with the circuit of the PCB board 2; the elastic cable 92 and the tail end interface 93 can be respectively extended and received in the wiring receiving groove 62 and the interface receiving groove 63.

[0091] In order to facilitate the storage of the data cable 9, it is necessary to increase the winding property, that is, the resilience, of the data cable 9 so that the data cable 9 can be stored at a corner. Therefore, the outer rubber layer of the data cable 9 of the hand-painted board is preferably made of TPE material rather than the more common PVC material. However, while increasing the winding property / resilience, the better the winding property / resilience of the data cable 9, the more difficult it is to ensure the dimensional tolerance of its production and manufacturing as the length of the data cable 9 increases, resulting in the data cable 9 being too short or too long relative to the storage slot, and then causing the data cable 9 to be embedded in the storage slot or the head end connector 91 or the tail end interface 93 of the data cable 9 to be buckled into the corresponding slot body, and partial bulging occurs due to the excessive size; and when the head end connector 91 or the tail end interface 93 of the data cable 9 is buckled into the corresponding slot body, the user needs to pull the data cable 9 hard to complete the storage due to the too short size, which easily causes the data cable 9 core to be welded or broken at the stress point, affecting the service life of the data cable 9 and increasing the use cost of the hand-painted board.

[0092] Since the above-mentioned wiring storage groove 62, connector accommodating groove 61 and interface storage groove 63 are all arranged on the side periphery of the shell 6, the U-shaped card groove arranged at the bottom of the shell 6 makes full use of the size of the peripheral extension of the shell 6, so that the wiring storage groove 62 only needs to match a rounded transition of the shell 6 to set a storage corner, which is reduced by one storage corner compared to the traditional U-shaped card groove arranged at the bottom of the shell 6, so as to facilitate the control of the length variable of the data cable 9 and avoid local bulging or wire core breakage due to the excessive length or shortness of the elastic cable 92, the head end connector 91 and the tail end interface 93 of the data cable 9 when they are respectively accommodated in the wiring storage groove 62, the connector accommodating groove 61 and the interface storage groove 63.

[0093] In addition, for the sake of aesthetics and portability, the traditional data tail end interface 93 used in the hand-drawn tablet adopts an L-shaped structure, that is, the L-shaped tail end interface 93 of the data cable 9 is secondary molded on the basis of the one-time wire drawing and cable molding, resulting in less glue wrapping at the tail end of the data cable 9 and weaker strength of the data cable 9.

[0094] Please also read Figure 1 , 2, 9, 10, 13, 14, for this reason, the hand-drawn board provided by the utility model has a data cable 9 whose tail end is secondary molded with a T-shaped tail end interface 93 of the data cable 9 on the basis of a one-time wire drawing and molding cable, and the T-shaped tail end interface 93 is buckled into a T-shaped interface receiving groove 63 on the side periphery of the shell 6, avoiding the problem of less rubber wrapping at the tail end of the data cable 9 and weak strength of the data cable 9.

[0095] Please also read Figure 1 , 2 , 9, 10, as the preferred implementation manner of this embodiment, a plurality of upper pre-stressing ribs 593 are arranged at intervals on the top surface of the upper wiring groove 59, and a plurality of lower pre-stressing ribs 161 are arranged at intervals on the bottom surface of the lower wiring groove 16.

[0096] Please also read Figure 1 , 2 , 9, 10, as a more preferred implementation of this embodiment, the upper pre-compression ribs 593 and the lower pre-compression ribs 161 are arranged in pairs at intervals at the two ends of the rounded corner transition of the top shell 5 and the bottom shell 1, respectively, or the upper pre-compression ribs 593 and the lower pre-compression ribs 161 can also be directly arranged in the middle section of the rounded corner transition of the top shell 5 and the bottom shell 1. The interval between adjacent upper pre-compression ribs 593 and lower pre-compression ribs 161 is preferably 60 mm.

[0097] Since the wiring storage groove 62 of the hand-drawn board provided by the utility model has a certain depth and only has one storage corner, and at the same time, the upper pre-stressing ribs 593 and the lower pre-stressing ribs 161 are added at the storage corners or both ends of the wiring storage groove 62 and at certain intervals at various places, the stability of the data cable 9 stored in the wiring storage groove 62 is improved, and the length dimension variation of the data cable 9 during the storage process is reduced, so that the elastic cable 92 and the tail end interface 93 of the data cable 9 can be relatively fixed to the head end connector 91 in the connector receiving groove 61 in the shell 6, and quickly wound in the wiring storage groove 62 and the interface storage groove 63. Therefore, compared with the traditional storage structure of gradually pressing and pulling the data cable 9 at various places to embed the data cable 9 for storage and pulling out for use in the U-shaped card slot, the hand-drawn board provided by the utility model makes the storage and use of the data cable 9 quick and efficient, and further reduces the risk of local bulging of the data cable 9 or wire core welding / stress end breakage. According to tests, after the hand-painted board adopts the data cable 9 provided by the utility model, its manufacturing yield rate can be increased by 20%, and the data cable storage efficiency can be increased by 60%.

[0098] In this embodiment, the data cable 9 is a USB data cable 9 .

[0099] In other embodiments, the data cable 9 may also be a Type-C or Lightning data cable 9.

[0100] Please also read Figure 1 , 2, 4, 11, 12, in this embodiment, the hand-drawing board also includes:

[0101] The silicone foot pads 18 are respectively fixedly installed at the four rounded transition points on the bottom surface of the bottom shell 1, and the shape of the silicone foot pads 18 matches the contour of the rounded transition points on the bottom surface of the bottom shell 1. They are used to support and protect the hand-drawn board shell 6 to prevent the hand-drawn board from being scratched by contact with the supporting contact surface. At the same time, they can be used to cover the exposed screws on the shell 6 and the first end connector 91 of the data cable 9, thereby improving the aesthetics and smoothness of the hand-drawn board product.

[0102] Please also read Figure 1-4 In this embodiment, an upper pen cover groove (not shown in the figure) and a lower pen cover groove (not shown in the figure) are respectively provided on corresponding sides of the top shell 5 and the bottom shell 1. When the top shell 5 and the bottom shell 1 are docked and combined into the shell body 6, the upper pen cover groove and the lower pen cover groove form a pen cover installation groove (not shown in the figure).

[0103] The sketchpad also includes:

[0104] The pen cover 64 is fixedly mounted on one side of the housing 6. Preferably, one end of the pen cover 64 is embedded in the pen cover 64 mounting groove 131, and is fixedly mounted on one side of the housing 6 by screws passing through corresponding holes of the top housing 5, the bottom housing 1 and the pen cover 64. The pen cover 64 is used to store and place a pressure-sensitive pen (not shown in the figure) for hand-drawing and handwriting that is matched with the hand-drawing board.

[0105] As a preferred implementation of this embodiment, the pen cover 64 is made of cloth or ribbed tape.

[0106] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand-painted board, characterized in that: include: bottom shell and top shell; A PCB board is installed inside the top shell; A plurality of touch switches are arranged in sequence and spaced apart on the top surface of the PCB board; Integrated silicone button, including: The button base is in the shape of a long strip; A plurality of silicone key units are arranged on the top surface of the key base in a protruding manner and at intervals in order to match the respective light touch switches, and the peripheral side of the bottom end of the silicone key unit is connected to the top surface of the key base through a first chamfered cone surface; a plurality of deformable cavities are arranged on the bottom surface of the key base to match the respective silicone key units, and the top of the deformable cavities is connected to the silicone key unit, and an elastic thin wall connected between the bottom end of the silicone key unit and the top surface of the key base is formed between the deformable cavities and the first chamfered cone surface; the key base is installed on the top surface of the PCB board, and the deformable cavities cover the outside of the respective light touch switches in a one-to-one matching manner; A plurality of clearance through holes are sequentially arranged on the top shell at intervals to match the respective silicone key units, and the connection between the bottom end of the clearance through hole and the bottom surface of the top shell forms a second chamfered cone surface matching the first chamfered cone surface; The top shell and the bottom shell are connected and combined into a shell, and the tops of the silicone key units are matched to extend out of the respective clearance holes to the outside of the top of the shell, and the first chamfered cone surfaces are matched to the second chamfered cone surfaces.

2. The hand-painted board according to claim 1, characterized in that: An arc-shaped groove with a lower center and a higher outer edge is provided in the middle of the top surface of the silica gel key unit, and the position where the touch switch is arranged on the top surface of the PCB board matches the arc-shaped groove.

3. The hand-painted board according to claim 1, characterized in that: The silicone key unit is in the shape of a truncated cone, and the inner side surface of the clearance hole is an inclined conical surface that matches the outer side surface of the truncated cone of the silicone key unit. While the top end of the silicone key unit extends out of the clearance hole to the outside of the top of the shell, the outer side surface of the truncated cone of the silicone key unit abuts against the inner side surface of the clearance hole.

4. The hand-painted board according to claim 1, characterized in that: The deformable cavity is in the shape of a truncated cone, and a cavity opening is formed at the connection between the bottom end of the deformable cavity and the bottom surface of the key base. The bottom surface of the key base is provided with a plurality of first exhaust grooves and second exhaust grooves, wherein the first exhaust grooves are connected one-to-one between adjacent cavity openings, and the second exhaust grooves are connected between the cavity opening and the side surface of the key base.

5. The hand-painted board according to claim 2, characterized in that: The touch switch is in a stepped shape with a narrower top and a wider bottom. The diameter of the top contact of the touch switch is 2 mm, the diameter of the silicone key unit is 15 mm, the diameter of the arc-shaped groove is 11 mm, the key thickness of the silicone key unit is 4 mm, and the pressing height of the bottom end of the silicone key unit from the top surface of the PCB board is 2.5 mm.

6. The hand-painted board according to any one of claims 1 to 5, characterized in that: The bottom shell and the top shell are both rectangular with rounded corners. An upper interface receiving groove is provided at the bottom of one side periphery of the top shell. One end of the upper interface receiving groove is deeper than the other end of the upper interface receiving groove. An upper connector receiving groove is provided at the bottom of the adjacent side periphery of the top shell where the upper interface receiving groove is provided. An upper wiring groove is provided at the bottom of the top shell, extending along the periphery of the top shell and connecting the upper connector receiving groove and the upper interface receiving groove. A lower interface receiving groove mirror-matched with the upper interface receiving groove is provided on the top of one side periphery of the bottom shell, a lower connector receiving groove mirror-matched with the upper connector receiving groove is provided on the top of the adjacent side periphery of the bottom shell where the lower interface receiving groove is provided, and a lower wiring groove extending along the periphery of the bottom shell and connecting the lower connector receiving groove and the lower interface receiving groove is provided on the top of the bottom shell; When the top shell and the bottom shell are connected and assembled into a housing, the upper interface storage groove and the lower interface storage groove form a T-shaped interface storage groove, the upper joint receiving groove and the lower joint receiving groove form a joint receiving groove, and the upper wiring groove and the lower wiring groove form a wiring storage groove; The hand-painted board also includes: A data cable, comprising a tail end interface matching the shape of the interface receiving slot, a head end connector matching the shape of the connector receiving slot, and an elastic cable matching the shape of the wiring receiving slot and connected between the head end connector and the tail end interface; The head end connector is fixedly installed in the connector receiving groove, and the elastic cable and the tail end interface can be correspondingly received in the wiring receiving groove and the interface receiving groove respectively.

7. The hand-painted board according to claim 6, characterized in that: A plurality of upper pre-compression ribs are arranged at intervals on the top surface of the upper wiring trough, and a plurality of lower pre-compression ribs are arranged at intervals on the bottom surface of the lower wiring trough.

8. The hand-painted board according to claim 6, characterized in that: The outer rubber layer of the data cable is made of TPE material.

9. The hand-painted board according to claim 1, characterized in that: The top surface of the top shell is provided with a flange extending around the top shell along the periphery of the top shell, a mounting groove is formed between the flange and the top surface of the top shell, and the clearance through hole is provided on the bottom surface of the mounting groove; The hand-painted board also includes: A hand-painted covering film, the shape of which matches the shape of the mounting groove; a plurality of clearance openings, which are sequentially arranged on the hand-painted covering film in a manner matching the clearance through holes; The hand-painted covering film is attached and installed in the installation groove, and the tops of the various silicone key units are matched one by one and sequentially extended out of the various clearance holes and the clearance openings to the outside of the top of the shell.

10. The hand-painted board according to claim 1, characterized in that: A plurality of support seats are arranged at intervals on the inner side of the bottom shell, a plurality of connection holes are arranged at intervals on the PCB board, and a plurality of mounting holes matching the connection holes are arranged at intervals on the top shell; The bottom end of the PCB board is supported on each support seat and is fixedly installed inside the shell by connecting screws passing through the corresponding connecting holes and the mounting holes.

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