CN217035040U

CN217035040U - Variable curvature display

Info

Publication number: CN217035040U
Application number: CN202220440851.8U
Authority: CN
Inventors: 黄俊皓; 颜清辉; 叶建成
Original assignee: Syncmold Enterprise Corp
Current assignee: Syncmold Enterprise Corp
Priority date: 2021-03-08
Filing date: 2022-03-02
Publication date: 2022-07-22
Anticipated expiration: 2032-03-02
Also published as: CN216667064U; TWM626188U; CN217003780U; TWM628296U; TWM625532U; CN215173663U; CN216280331U; TWM627516U; TWM620030U

Abstract

The utility model provides a variable curvature display which is arranged on a bracket and comprises a central structural part, an actuating unit, a left hinge group, a right hinge group, a flexible supporting plate and a flexible display panel, wherein the bending degrees of the left hinge group and the right hinge group can be changed, so that the curvature of the flexible display panel is changed.

Description

Variable curvature display

Technical Field

The present invention relates to a variable curvature display, and more particularly, to a variable curvature display with adjustable curvature.

Background

Chinese patent No. CN205824536U discloses a double-arc display bracket, which comprises a base, a vertical supporting portion and a horizontal supporting portion, wherein one end of the vertical supporting portion is fixedly connected to the base, and the other end of the horizontal supporting portion is fixedly connected to the other end of the vertical supporting portion, so that the vertical supporting portion and the horizontal supporting portion are designed into an arc shape, thereby increasing the presence of a user watching the display.

However, the dual arc-shaped display bracket has a fixed curvature, and the distance between the user and the display panel may be limited within a certain range if the user obtains the best viewing effect.

Therefore, the present invention provides a novel flexible display, which can adjust the curvature of the flexible display according to the viewing distance of the user to provide the best visual presence.

SUMMERY OF THE UTILITY MODEL

The utility model provides a variable curvature display, which is arranged on a bracket, the bracket comprises a bearing part, and the variable curvature display comprises: a central structural member arranged on the bearing member and comprising a fixed block; an actuating unit arranged on the central structural member and comprising a gear shaft, wherein the gear shaft can rotate along a central axis; the left hinge set is arranged on one side of the fixed block, is linked with the gear shaft and defines a left bending degree; the right hinge set is arranged on the other side of the fixed block, is linked with the gear shaft and defines a right bending degree; and a flexible support plate, which is arranged on the central structural member, the left hinge group and the right hinge group and can bend along with the left hinge group and the right hinge group; and a flexible display panel disposed on the flexible supporting plate and capable of bending along with the flexible supporting plate and defining a curvature; when the gear shaft rotates, the left hinge unit and the right hinge unit are driven simultaneously to change the left bending degree and the right bending degree, so that the curvature is changed.

The left hinge assembly comprises a left rack unit, at least one left hinge unit and a left end edge unit which are mutually linked, the left rack unit is provided with a left rack plate, the left rack plate is meshed with the gear shaft, the left hinge unit is clamped between the left rack unit and the left end edge unit, the right hinge assembly comprises a right rack unit, at least one right hinge unit and a right end edge unit which are mutually linked, the right rack plate is provided with a right rack plate, the right rack plate is meshed with the gear shaft, the right hinge unit is clamped between the right rack plate and the right end edge unit, the left rack plate can be switched between a first left position and a second left position by means of rotation of the gear shaft, the right rack plate can be switched between a first right position and a second right position, when the left rack plate is at the first left position and the right rack plate is at the first right position, the left bending degree and the right bending degree are maximum, the curvature of the flexible display panel is at a maximum, and when the left rack plate is in the second left position and the right rack plate is in the second right position, the left and right degrees of bending are at a minimum, and the curvature of the flexible display panel is at a minimum.

Each left hinging unit is provided with a left connecting plate, a first left hinging block and a second left hinging block, the left connecting plate is arranged on the first left hinging block and the second left hinging block in a crossing manner, the first left hinging block and the second left hinging block are mutually pivoted and can respectively rotate relative to the left connecting plate, the left connecting plate closest to the left rack plate is pivoted on the left rack plate, and the first left hinging block closest to the fixed block is pivoted on the fixed block; each right hinging unit is provided with a right connecting plate, a first right hinging block and a second right hinging block, the right connecting plate is arranged on the first right hinging block and the second right hinging block in a crossing manner, the first right hinging block and the second right hinging block are mutually pivoted and can respectively rotate relative to the right connecting plate, the right connecting plate which is most adjacent to the right toothed bar plate is pivoted on the right toothed bar plate, and the first right hinging block which is most adjacent to the fixed block is pivoted on the fixed block.

The left hinge group further comprises a plurality of left positive shafts and a plurality of left negative shafts, the right hinge group further comprises a plurality of right positive shafts and a plurality of right negative shafts, the left connecting plate and the left rack plate are pivoted on one of the left negative shafts, the first left hinge block and the second left hinge block are pivoted on one of the left positive shafts, the right connecting plate and the right rack plate are pivoted on one of the right negative shafts, and the first right hinge block and the second right hinge block are pivoted on one of the right positive shafts.

The left end edge unit comprises a first left end block which is pivoted with the left hinge unit farthest from the fixed block, and the right end edge unit comprises a first right end block which is pivoted with the right hinge unit farthest from the fixed block.

The left connecting plates of any two adjacent left hinging units are pivoted on one of the left reverse shaft rods, and the first left hinging block of one of the left hinging units and the second left hinging block of the other left hinging unit are pivoted on one of the left positive shaft rods; and the right connecting plates of any two adjacent right hinging units are pivoted on one of the right reverse shaft rods, and the first right hinging block of one of the right hinging units and the second right hinging block of the other right hinging unit are pivoted on one of the right positive shaft rods.

Each left connecting plate is provided with a first left arc penetrating groove and a second left arc penetrating groove, each first left hinging block is provided with a first left bottom arc groove, each second left hinging block is provided with a second left bottom arc groove, the left positive shaft rod correspondingly penetrates through the first left arc penetrating groove and the second left arc penetrating groove respectively, and the left negative shaft rod correspondingly penetrates through the first left bottom arc groove and the second left bottom arc groove respectively; each right connecting plate is provided with a first right arc through groove and a second right arc through groove, each first right hinge block is provided with a first right bottom arc groove, each second right hinge block is provided with a second right bottom arc groove, the right positive shaft rod is correspondingly arranged in the first right arc through groove and the second right arc through groove respectively, and the right reverse shaft rod is correspondingly arranged in the first right bottom arc groove and the second right bottom arc groove respectively.

The left end edge unit also comprises a left end plate and a second left end block, the left end plate is spanned on the first left end block and the second left end block, and the first left end block and the second left end block are mutually pivoted and can respectively rotate relative to the left end plate; the right end edge unit also comprises a right end plate and a second right end block, the right end plate is arranged across the first right end block and the second right end block, and the first right end block and the second right end block are mutually pivoted and can respectively rotate relative to the right end plate.

The first left arc through groove, the second left arc through groove, the first right arc through groove and the second right arc through groove are all bent towards a first direction, the first left bottom arc groove, the second left bottom arc groove, the first right bottom arc groove and the second right bottom arc groove are all bent towards a second direction, and the first direction is opposite to the second direction.

Each first left arc through groove is respectively provided with a head end and a tail end, each second left arc through groove is respectively provided with a head end and a tail end, each first left bottom arc groove is respectively provided with a head section and a tail end, each second left bottom arc groove is respectively provided with a head section and a tail section, each first right arc through groove is respectively provided with a head end and a tail end, each second right arc through groove is respectively provided with a head end and a tail end, each first right bottom arc groove is respectively provided with a head section and a tail section, each second right bottom arc groove is respectively provided with a head section and a tail section, each head end is close to the fixed block relative to each corresponding tail end, each head section is close to the fixed block relative to each corresponding tail section, when the left rack plate is at the first left position and the right rack plate is at the first right position, the left positive shaft rod and the right positive shaft rod are both at the corresponding tail ends, and the left negative shaft rod and the right negative shaft rod are both at the head sections of the corresponding shaft rods, when the left rack plate is at the second left position and the right rack plate is at the second right position, the left front axle rod and the right front axle rod are at the corresponding head ends, and the left rear axle rod and the right rear axle rod are at the corresponding tail sections.

The first left arc through groove, the second left arc through groove, the first left bottom arc groove and the second left bottom arc groove are all closer to the fixed block, and the bending degree is smaller; the first right arc through groove, the second right arc through groove, the first right bottom arc groove and the second right bottom arc groove are all closer to the fixed block, and the bending degree is smaller.

If any two left connecting plates which are mutually pivoted mutually form a first left included angle, and any two right connecting plates which are mutually pivoted mutually form a first right included angle, when the left rack plate is at the first left position and the right rack plate is at the first right position, the first left included angle is minimum and the first right included angle is minimum, and when the left rack plate is at the second left position and the right rack plate is at the second right position, the first left included angle is maximum and the first right included angle is maximum.

The left rack plate is provided with a first left through groove, and a left reverse shaft rod pivoted with the left connecting plate and the left rack plate penetrates through the first left through groove; the right rack plate is provided with a first right through groove, and a right reverse shaft rod pivoted with the right connecting plate and the right rack plate penetrates through the first right through groove.

This left rack board still has a left side through-groove of second, and this right rack board still has the right through-groove of second, and central structure still contains a central axostylus axostyle, and this left side through-groove of second and this right side through-groove of second are at least partly overlapped and are established, and this central axostylus axostyle is worn to locate this left side through-groove of second and this right side through-groove of second and is fixed in this fixed block.

The left rack unit further has a left screw, the left rack plate further has a left rack, a left plate groove and a left plate body, the left rack is formed on the left plate body, and is engaged with the gear shaft, and has a first left end and a second left end, the left plate groove, the first left through groove and the second left through groove are formed on the left plate body, the left screw penetrates through the left plate groove, the fixing block and a first left hinge block nearest to the fixing block, and is capable of moving relative to the left plate groove, the right rack unit further has a right screw, the right rack plate further has a right rack, a right plate groove and a right plate body, the right rack is formed on the right plate body, and is engaged with the gear shaft, and has a first right end and a second right end, the right plate groove, the first right through groove and the second right through groove are formed on the right plate body, the right screw penetrates through the right plate groove, the fixing block and a first right hinge block nearest to the fixing block, and can move relative to the right plate groove, when the left rack plate is at the first left position and the right rack plate is at the first right position, the gear shaft is meshed with the first left end and the first right end, and when the left rack plate is at the second left position and the right rack plate is at the second right position, the gear shaft is meshed with the second left end and the second right end.

The flexible supporting plate is fixedly locked on the first left hinging block, the second left hinging block, the fixing block, the first right hinging block and the second right hinging block and can be bent along with the left bending degree of the left hinging unit and the right bending degree of the right hinging unit so as to change the curvature.

Any two first left hinged blocks and any two second left hinged blocks which are mutually pivoted form a first left hinged angle, any two first right hinged blocks and any two second right hinged blocks which are mutually pivoted form a first right hinged angle, when the left rack plate is at the first left position and the right rack plate is at the first right position, the first left hinged angle is minimum and the first right hinged angle is minimum, and when the left rack plate is at the second left position and the right rack plate is at the second right position, the first left hinged angle is maximum and the first right hinged angle is maximum.

The variable curvature display further comprises a sensing unit and a trigger piece, the sensing unit is arranged on the fixing block, the trigger piece is arranged on the left hinge group or the right hinge group, the actuating unit further comprises a motor and a control panel, the motor is used for driving the gear shaft to rotate by itself, the control panel is in signal connection with the sensing unit and the motor, when the trigger piece triggers the sensing unit, the sensing unit generates a stop signal to the control panel, and the control panel controls the motor to stop running.

Drawings

Fig. 1 is a perspective view of a variable curvature display according to an embodiment of the utility model.

Fig. 2 is an exploded perspective view of a variable curvature display according to an embodiment of the present invention.

FIG. 3 is a partial schematic view of a variable curvature display according to an embodiment of the utility model.

Fig. 4 is a schematic perspective view of a fixing block according to an embodiment of the utility model.

Fig. 5 is a perspective view of a left hinge set according to an embodiment of the present invention.

Fig. 6 is a perspective view of a left rack unit according to an embodiment of the present invention.

Fig. 7 is an exploded view of the left hinge set according to one embodiment of the present invention.

FIG. 8 is a bottom view of the left hinge set of one embodiment of the present invention.

Fig. 9 is a perspective view of a right hinge set according to an embodiment of the present invention.

Fig. 10 is a perspective view of a right rack unit according to an embodiment of the present invention.

Fig. 11 is an exploded view of the right hinge set according to one embodiment of the present invention.

Fig. 12 is a perspective view of the left rack plate at a first left position and the right rack plate at a first right position according to an embodiment of the present invention.

Fig. 13 is a partial exploded view of the left rack plate in the first left position and the right rack plate in the first right position according to an embodiment of the present invention.

Fig. 14 is a perspective view of the left rack plate at a second left position and the right rack plate at a second right position according to an embodiment of the present invention.

Fig. 15 is a partial exploded view of the left rack plate in a second left position and the right rack plate in a second right position in accordance with one embodiment of the present invention.

[ description of reference ]

1000-variable curvature display

2000-support

2001-Carrier

1-central structural element

11-fixed block

111-center through groove

112-first perforation

113-second perforation

114-first setting table

115-second setting table

116-locking projection

12-center shaft

2-actuating unit

21-gear shaft

22-motor

23-control panel

3-left hinge unit

31-left rack unit

311-left rack plate

3111 left rack

31111 first left end

31112-second left end

3112 left board groove

3113 left board

3114 first left through groove

3115 second left through groove

32-left hinge unit

321-left connecting plate

3211 first left arc through groove

32111. 32121, 33111, 42111, 42121, 43111-head end

32112. 32122, 33112, 42112, 42122, 43112-tail end

3212 second left arc groove

322-left hinged block

3221-first left bottom arc groove

32211. 32311, 33211, 33311, 42211, 42311, 43211, 43311-head segment

32212. 32312, 33212, 33312, 42212, 42312, 43212, 43312-Tail segment

3222-first left pad

323-second left hinged block

3231 second left bottom arc groove

3232 second left gasket

33-left edge unit

331-left end plate

3311-left end arc through groove

332-first left end Block

3321 first left end bottom arc groove

333-second left end Block

3331 second left end bottom arc groove

34-left positive shaft lever

35-left reverse shaft rod

41-Right rack unit

411-Right rack bar

4111-Right rack

41111 first right end

41112-second right end

4112 right plate groove

4113-right plate body

4114 first right through groove

4115 second right through groove

42-Right hinge Unit

421-Right connecting plate

4211 first right arc through groove

4212 second Right arc through groove

422-right hinged block

4221 first right bottom arc groove

4222 first right pad

423-second right hinged block

4231 second Right bottom arc groove

4232 second Right pad

43-right end edge unit

431-Right end plate

4311-right end arc through groove

432-first Right end Block

4321-first right end bottom arc groove

433-second right end block

4331-second right end bottom arc groove

44-right positive shaft rod

45-right reverse shaft rod

5-Flexible support plate

6-flexible display panel

7-inductive element

71-first sensing member

72-second sensing element

8-trigger

81-first contact plate

82-second contact plate

-first left articulation angle

First right articulation angle

Theta 1-first left angle

Theta 2-first right included angle

R1-first direction of rotation

R2-second Direction of rotation

A-central axis

D1-first Direction

D2-second Direction

Detailed Description

Other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure of the present specification. It should be noted that the following drawings are simplified schematic drawings, the number, shape and size of the components in the drawings can be changed freely according to the actual implementation conditions, and the layout state of the components can be more complicated. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

First, a variable curvature display 1000 according to the present invention is shown in a schematic perspective view of fig. 1 and an exploded perspective view of fig. 2. Referring to fig. 1 and 2, the variable curvature display 1000 is disposed on a support 2000, and the support 2000 is disposed on a working surface (not shown) and includes a supporting member 2001, the working surface is, for example, a desktop, but not limited thereto, and may be a wall surface in other embodiments.

The curvature-variable display 1000 mainly includes a central structural member 1, an actuating unit 2, a left hinge set 3, a right hinge set 4, a flexible supporting plate 5, a flexible display panel 6, a sensing unit 7 (see fig. 3), and a trigger 8 (see fig. 3). The central structure 1 is disposed on the bracket 2000, the actuating unit 2 and the sensing unit 7 are disposed on the central structure 1, the left hinge group 3 is disposed on one side of the central structure 1, the right hinge group 4 is disposed on the other side of the central structure 1, the flexible support plate 5 is disposed on the central structure 1, the left hinge group 3 and the right hinge group 4, the flexible display panel 6 is disposed on the flexible support plate 5, and the trigger 8 is formed on the left hinge group 3.

In detail, referring to fig. 3, the central structural member 1 is disposed on the carrier 2001 and includes a fixing block 11 and a central shaft 12. As shown in fig. 4, the fixing block 11 includes a central through-slot 111, a first through-hole 112, a second through-hole 113, a first setting table 114, a second setting table 115, and two locking protrusions 116, wherein the central through-slot 111 is used for the central shaft 12 to pass through, the first through-hole 112 is used for a portion of the left hinge set 3 to be set, the second through-hole 113 is used for a portion of the right hinge set 4 to be set, the first setting table 114 and the second setting table 115 are respectively located on two sides of the fixing block 11 and are used for the sensing unit 7 to be set, and the locking protrusions 116 are used for a portion of the actuating unit 2 to be set.

The actuating unit 2 is disposed on the central structural member 1 and includes a gear shaft 21, a motor 22, and a control board 23 (as shown in fig. 2), the gear shaft 21 can be driven by the motor 22 to rotate along a central axis a, the motor 22 is disposed on the locking protrusion 116, and the control board 23 is in signal connection with the motor 22 and can control the motor 22 to start or stop operation.

As shown in the partial perspective view of fig. 5 and the partial exploded view of fig. 7, the left hinge group 3 is disposed at one side of the fixed block 11 and is coupled to the gear shaft 21, and the left hinge group 3 defines a left bending degree and includes a left rack unit 31, four left hinge units 32, a left end edge unit 33, nine left positive shafts 34, and ten left negative shafts 35 coupled to each other.

As shown in fig. 6, the left rack unit 31 has a left rack plate 311, and a left screw 312, and the left rack plate 311 has a left rack 3111, a left plate groove 3112, a left plate body 3113, a first left through groove 3114, and a second left through groove 3115. The left rack 3111 is formed on the left plate 3113 and is engaged with the gear shaft 21, and the left rack 3111 has a first left end 31111 and a second left end 31112. The left plate groove 3112, the first left through groove 3114 and the second left through groove 3115 are all formed on the left plate body 3113 at intervals, and the left plate groove 3112 is located between the first left through groove 3114 and the second left through groove 3115.

As shown in the partially exploded view of fig. 7, the left screw 312 penetrates the left plate slot 3112, the first through hole 112 of the fixing block 11, and the left hinge unit 32 nearest to the fixing block 11, and can move relative to the left plate slot 3112.

Next, as shown in fig. 7, the left hinge units 32 are sandwiched between the left rack unit 31 and the left edge unit 33, and each left hinge unit 32 has a left connecting plate 321, a first connecting plateA left hinge block 322 and a second left hinge block 323, wherein the left connecting plate 321 is disposed between the first left hinge block 322 and the second left hinge block 323, the first left hinge block 322 and the second left hinge block 323 are pivotally connected to each other and can rotate relative to the left connecting plate 321, as shown in the top view of fig. 8, a first left hinge angle is formed between the first left hinge block 322 and the second left hinge block 323

The left connecting plate 321 closest to the left rack plate 311 is pivotally connected to the left rack plate 311, and the first left hinge block 322 closest to the fixed block 11 is pivotally connected to the fixed block 11 by the left screw 312. In addition, between any two adjacent left hinge units 32, the left connecting plate 321 is pivoted to one of the left counter shaft rods 35, the left connecting plate 321 and the left counter shaft rod 35 pivoted to the left rack plate 311 are inserted into the first left through groove 3114, and a first left included angle θ 1 (as shown in fig. 5) is formed between any two pivoted left connecting plates 321, except for the first left hinge block 322 nearest to the fixed block 11 and the second left hinge block 323 nearest to the left end edge unit 33, the first left hinge block 322 of one of the other left hinge units 32 and the second left hinge block 323 of the other adjacent left hinge unit 32 are pivoted to one of the left counter shaft rods 34.

Each left connecting plate 321 has a first left arc through groove 3211 and a second left arc through groove 3212. Each first left hinge block 322 has a first left bottom arc groove 3221 and a first left pad 3222. Each second left hinge block 323 has a second left bottom arc groove 3231 and a second left pad 3232. The first left arc through groove 3211 and the second left arc through groove 3212 both protrude and bend in a first direction D1; the first left bottom arc groove 3221 and the second left bottom arc groove 3231 are both curved by protruding toward a second direction D2, the first direction D1 is opposite to the second direction D2, and the first left arc groove 3211, the second left arc groove 3212, the first left bottom arc groove 3221, and the second left bottom arc groove 3231 are all curved to a smaller extent as they approach the fixing block 11. Each first left arc-through groove 3211 has a head end 32111 and a tail end 32112, each second left arc-through groove 3212 has a head end 32121 and a tail end 32122, each first left bottom arc-through groove 3221 has a head segment 32211 and a tail segment 32212, each second left bottom arc-through groove 3231 has a head segment 32311 and a tail segment 32312, wherein each

head end

32111, 32121 is close to the fixing block 11 corresponding to each

tail end

32112, 32122, and each

head segment

32211, 32311 is close to the fixing block 11 corresponding to each

tail segment

32212, 32312. The first left pad 3222 and the second left pad 3232 are in contact with the flexible supporting plate 5.

The left end unit 33 further includes a left end plate 331, a first left end block 332, and a second left end block 333, the left end plate 331 straddles the first left end block 332 and the second left end block 333, and has a left end arc through slot 3311, the first left end block 332 and the second left end block 333 are pivotally connected to each other and can rotate relative to the left end plate 331, and have a first left end bottom arc slot 3321 and a second left end bottom arc slot 3331, respectively, the first left end block 332 and the left hinge unit 32 farthest from the fixed block 11 are pivotally connected to one of the left upright shafts 34, and the curvature of the second left end bottom arc slot 3331 is slightly larger than that of the first left end bottom arc slot 3321. In detail, the left arc-through slot 3311 of the left plate 331 also has a head 33111 and a tail 33112; the first left end bottom arc groove 3321 of the first left end block 332 has a head section 33211 and a tail section 33212; the second left end bottom arc groove 3331 of the first left end block 333 has a head section 33311 and a tail section 33312, the head section 33111 is close to the fixed block 11 opposite to the tail section 33112, and the head section 33211 is close to the fixed block 11 opposite to the tail section 33212.

The left positive shaft 34 is respectively and correspondingly inserted into the first left arc slot 3211, the second left arc slot 3212 and the left end arc slot 3311, the left negative shaft 35 is respectively and correspondingly inserted into the first left bottom arc slot 3221, the second left bottom arc slot 3231, the first left bottom arc slot 3321 and the second left bottom arc slot 3331, the left connecting plate 321 and the left rack plate 311 are pivotally connected to one of the left negative shaft 35, and the first left hinge block 322 and the second left hinge block 323 are pivotally connected to one of the left positive shaft 34.

The right hinge set 4 is disposed at the other side of the fixed block 11, and is substantially symmetrically disposed with respect to the left hinge set 3 with reference to the central axis a.

As shown in the partial perspective view of fig. 9, the right hinge group 4 defines a right bending degree, and includes a right rack unit 41, four right hinge units 42, a right edge unit 43, nine right positive shafts 44, and ten right negative shafts 45, which are interlocked with each other.

Referring to fig. 10, the right rack unit 41 has a right rack bar 411 and a right screw 412, the right rack bar 411 has a right rack bar 4111, a right plate groove 4112, a right plate 4113, a first right through groove 4114, and a second right through groove 4115. Wherein, the right rack 4111 is formed on the right plate 4113 and engaged with the gear shaft 21, and the right rack 4111 has a first right end 41111 and a second right end 41112. The right plate groove 4112, the first right through groove 4114, and the second right through groove 4115 are formed on the right plate 4113 at intervals, and the right plate groove 4112 is located between the first right through groove 4114 and the second right through groove 4115. The second left through groove 3115 and the second right through groove 4115 are at least partially overlapped, and the central shaft 12 penetrates through the second left through groove 3115 and the second right through groove 4115.

Referring to fig. 11, the right screw 412 penetrates the right plate groove 4112, the second through hole 113 of the fixed block 11, and the right hinge unit 42 (i.e., the first right hinge unit) nearest to the fixed block 11, and can move relative to the right plate groove 4112.

Referring to fig. 9, the right hinge units 42 are sandwiched between the right rack unit 41 and the right edge unit 43, and each right hinge unit 42 has a right connecting plate 421, a first right hinge block 422, and a second right hinge block 423, wherein the right connecting plate 421 is disposed across the first right hinge block 422 and the second right hinge block 423, and the first right hinge block 422 and the second right hinge block 423 are pivotally connected to each other and can rotate relative to the right connecting plate 421 respectively, and form a first right hinge angle therebetween

(as shown in fig. 13), the right connecting plate 421 most adjacent to the right rack bar 411 is pivoted to the right rack bar 411, and the first right hinge block 422 most adjacent to the fixed block 11 is pivoted by the right connecting plate 421The right screw 412 is pivotally connected to the fixing block 11. In addition, between any two adjacent right hinge units 42, the right connecting plate 421 is pivotally connected to one of the right opposite shafts 4, the right opposite shaft 45 to which the right connecting plate 421 and the right rack bar 411 are pivotally connected passes through the first right through groove 4114, and a first right included angle θ 2 is formed between any two pivotally connected right connecting plates 421, except for the first right hinge block 422 nearest to the fixed block 11 and the second right hinge block 423 nearest to the right edge unit 43, the first right hinge block 422 of one of the other right hinge units 42 and the second right hinge block 423 of the other adjacent right hinge unit 42 are pivotally connected to one of the right positive shafts 44.

In detail, referring to the partial exploded view shown in fig. 11, each right connecting plate 421 has a first right arc slot 4211 and a second right arc slot 4212. Each first right hinge block 422 has a first right bottom arc groove 4221 and a first right pad 4222. Each second right hinge block 423 has a second right bottom arc groove 4231 and a second right spacer 4232. The first right arc perforation groove 4211 and the second right arc perforation groove 4212 both protrude and bend towards the first direction D1; the first right bottom arc groove 4221 and the second right bottom arc groove 4231 are both protruded and bent towards the second direction D2, and the first right bottom arc groove 4211, the second right bottom arc groove 4212, the first right bottom arc groove 4221 and the second right bottom arc groove 4231 are all bent to a smaller extent as they are closer to the fixing block 11. Each first right arc through groove 4211 is respectively provided with a head end 42111 and a tail end 42112, each second right arc through groove 4212 is respectively provided with a head end 42121 and a tail end 42122, each first right bottom arc groove 4221 is respectively provided with a head section 42211 and a tail section 42212, each second right bottom arc groove 4231 is respectively provided with a head section 42311 and a tail section 42312, wherein each

head end

42111 and 42121 is close to the fixed block 11 relative to each

tail end

42112 and 42122 corresponding to each

head end

42111 and 42121, and each

head section

42211 and 42311 are close to the fixed block 11 relative to each

tail section

42212 and 42312 corresponding to each head end 4211. The first right pad 4222 and the second right pad 4232 are in contact with the flexible support plate 5.

The right edge unit 43 further includes a right end plate 431, a first right end block 432, and a second right end block 433, the right end plate 431 straddles the first right end block 432 and the second right end block 433, and has a right arc through slot 4311, the first right end block 432 and the second right end block 433 are pivoted to each other and can rotate relative to the right end plate 431, and have a first right bottom arc slot 4321 and a second left bottom arc slot 4331, respectively, a first right end block 432 and the right hinge unit 42 farthest from the fixed block 11 are pivoted to one of the right positive shafts 44, and the curvature of the second right arc through slot 4331 is slightly larger than the first right arc through slot 4321. In detail, the right arc-through groove 4311 of the right end plate 431 also has a head 43111 and a tail 43112; the first right end bottom arc slot 4321 of the first right end block 432 has a head section 43211 and a tail section 43212; the second right end bottom arc groove 4331 of the first right end block 433 has a head section 43311 and a tail section 43312, the head section 43111 is close to the fixed block 11 relative to the tail end 43112, and the head section 43211 is close to the fixed block 11 relative to the tail section 43212.

The right front shaft rod 44 is respectively and correspondingly inserted into the first right arc slot 4211, the second right arc slot 4212 and the right end arc slot 4311, the right reverse shaft rod 45 is respectively and correspondingly inserted into the first right bottom arc slot 4221, the second right bottom arc slot 4231, the first right end bottom arc slot 4321 and the second right end bottom arc slot 4331, the right connecting plate 421 and the right rack plate 411 are pivotally connected to one of the right reverse shaft rods 45, and the first right hinge block 422 and the second right hinge block 423 are pivotally connected to one of the right front shaft rods 44.

The flexible supporting plate 5 is a flexible plate integrally formed in this embodiment, but in other embodiments, it can be formed by a plurality of plates pivotally connected to each other. The flexible supporting plate 5 is used for supporting the flexible display panel 6, and is disposed on the central structural member 1, the left hinge group 3, and the right hinge group 4, and can bend along with the left hinge group 3 and the right hinge group 4, in detail, the flexible supporting plate 5 is locked to the first left hinge block 322, the second left hinge block 323, the fixed block 11, the first right hinge block 422, and the second right hinge block 423, contacts the first left pad 3222, the second left pad 3232, the first right pad 4222, and the second right pad 4232, and can bend along with the left bending degree of the left hinge unit 32 and the right bending degree of the right hinge unit 42.

The flexible display panel 6 is disposed on the flexible support plate 5, and can be bent along with the flexible support plate 5, and defines a curvature that can be changed along with the flexible support plate 5, in detail, the curvature is changed along with changes of the left bending degree of the left hinge unit 32 and the right bending degree of the right hinge unit 42.

Referring to fig. 3 again, the sensing unit 7 includes a first sensing element 71 and a second sensing element 72, which are respectively disposed on the first setting table 114 and the second setting table 115 of the fixing block 11 and located at two sides of the gear shaft 21, in this embodiment, the first sensing element 71 and the second sensing element 72 are respectively a micro switch. The control board 23 is in signal connection with the sensing unit 7 and the motor 22.

The triggering member 8 has a first contact plate 81 and a second contact plate 82, which are formed on the left rack plate 311 of the left hinge group 3 (as shown in fig. 6), are respectively located at two sides of the gear shaft 21, and respectively correspond to the first sensing member 71 and the second sensing member 72, when the first contact plate 81 contacts and triggers the first sensing member 71, the sensing unit 7 will send a stop signal to the control board 23, and the control board 23 stops the operation of the motor 22; as such. When the second contact plate 82 contacts and triggers the second sensing member 72, the sensing unit 7 sends a stop signal to the control board 23, and the control board 23 also stops the motor 22. In the present embodiment, the first contact plate 81 and the second contact plate 82 are formed integrally with the left rack plate 311, however, in other embodiments, the triggering member 8 can be disposed on the right rack plate 411 of the right hinge set 4, or disposed on the left rack plate 311 and the right rack plate 411 simultaneously and symmetrically, depending on the design of the left rack plate 311 and the right rack plate 411.

In detail, when the pinion shaft 21 rotates, the left rack plate 311 engaged with the pinion shaft 21 can be switched between a first left position (shown in fig. 12) and a second left position (shown in fig. 14), and the right rack plate 411 engaged with the pinion shaft 21 can be switched between a first right position (shown in fig. 12) and a second right position (shown in fig. 14).

As shown in fig. 12 and 13, when the left rack plate 311 is at the first left position and the right rack plate 411 is at the first right position, the gear shaft 21 is engaged with the second left end 31112 of the left rack 3111 and the second right end 41112 of the right rack 4111, the left positive shaft 34 and the right positive shaft 44 are at the corresponding ends 32112, 32122, 33112, 42112, 42122, 43112, the left reverse shaft 35 and the right reverse shaft 42 are at the

corresponding head

32211, 32311, 33211, 33311, 42211, 42311, 43211, 43311, and the first left hinge angle between the first left hinge block 322 and the second left hinge block 323 which are pivotally connected to each other

To minimize the first right hinge angle between the first right hinge block 422 and the second right hinge block 423

(see fig. 15) is the smallest, the first left angle θ 1 between the left connecting plates 321 pivoted to each other is the smallest, and the first right angle θ 2 between the right connecting plates 421 pivoted to each other is the smallest. At this time, the left bending degree and the right bending degree are the largest, and the curvature of the flexible display panel 6 is the largest. At this time, the first contact plate 81 contacts and the first sensing member 71, so that the sensing unit 7 sends a stop signal to the control board 23, and the control board 23 stops the motor 22, so that the gear shaft 21 stops rotating to prevent the left hinge set 3 and the right hinge set 4 from being bent excessively, thereby damaging the variable curvature display 1000.

As shown in fig. 14 and 15, when the left rack plate 311 is at the second left position and the right rack plate 411 is at the second right position, the pinion shaft 21 is engaged with the first left end 31111 of the left rack 3111 and the first right end 41111 of the right rack 4111, the left positive shaft 34 and the right positive shaft 44 are at the corresponding head ends 32111, 32121, 33111, 42111, 42121, 43111, the left counter shaft 35 and the right counter shaft 45 are at the

corresponding tail sections

32212, 32312, 33212, 33312, 42212, 42312, 43212, 43312,at the same time, the first left articulation angle

To a maximum, the first right articulation angle

At maximum, the first left included angle θ 1 is at maximum, and the first right included angle θ 2 is at maximum. At this time, the left bending degree of the left hinge unit 32 and the right bending degree of the right hinge unit 42 are minimum, and the curvature of the flexible display panel 6 is minimum. At this time, the second contact plate 82 contacts and the second sensing member 72 causes the sensing unit 7 to send a stop signal to the control board 23, and the control board 23 stops the motor 22, so that the stop of the rotation of the gear shaft 21 can prevent the motor 22 from idling or the left hinge set 3 and the right hinge set 4 from being damaged due to structural limitations, thereby causing damage to the variable curvature display 1000.

When the curvature of the flexible display panel 6 is to be adjusted, the motor 22 is activated by the control board 23 of the actuating unit 2, the motor 22 drives the gear shaft 21 to rotate, and when the gear shaft 21 rotates, the left hinge set 3 and the right hinge set 4 are simultaneously driven to change the left bending degree and the right bending degree, thereby changing the curvature.

In detail, when the curvature of the flexible display panel 6 of the variable curvature display 1000 is adjusted from maximum (as shown in fig. 12) to small or minimum (as shown in fig. 14), the control board 23 activates the motor 22 to drive the gear shaft 21 to rotate in a first rotation direction R1, the left rack plate 311 is disengaged from the first left position, the gear shaft 21 is disengaged from the first left end 31111 of the left rack 3111, the displacement of the left rack plate 311 pushes the left connecting plate 321 pivoted thereto in the left hinge unit 32, so that the first left hinge block 322 and the second left hinge block 323 in the left hinge unit 32 rotate relative to the left connecting plate 321, respectively, so that the first left hinge block 322 and the second left hinge block 323 pivoted to each other between the first left hinge block 322 and the second left hinge block 323 are rotated relative to the left connecting plate 321, respectively, so that the first left hinge block 322 and the second left hinge block 323 are pivoted to form a first left angle

Gradually increasing, the first left included angle θ 1 included between the two left connecting plates 321 which are linked with the first left hinge block 322 and the second hinge block 323 and pivoted with each other gradually increases, and thus, the left bending degree of the left hinge unit 32 gradually decreases; synchronously, the right rack bar 411 is disengaged from the first right position, the gear shaft 21 is disengaged from the first right end 41111 of the right rack bar 4111, the displacement of the right rack bar 411 further pushes the right connecting plate 421 pivoted with the right hinge unit 42, so that the first right hinge block 422 and the second right hinge block 423 in the right hinge unit 42 respectively rotate relative to the right connecting plate 421, and the first right hinge angle between the first right hinge block 422 and the second right hinge block 423 pivoted with each other is formed

Gradually increasing, the first right included angle θ 2 between the two mutually pivoted right connecting plates 421 linked with the first right hinge block 422 and the second right hinge block 423 gradually increases, so that the right bending degree of the right hinge unit 42 gradually decreases, the bending degree of the flexible supporting member 5 also gradually decreases, and further the curvature of the flexible display panel 6 disposed thereon gradually decreases, and after the curvature of the flexible display panel 6 reaches a proper size, a user can stop the operation of the motor 21 by controlling the control plate 23.

However, if the gear shaft 21 continues to rotate in the first rotating direction R1 until the left rack plate 311 moves from the first left position to the second left position, the first contact plate 81 is away from the first sensing member 71 and the second contact plate 82 contacts the second sensing member 72, the control board 23 stops the motor 22 to stop the rotation of the gear shaft 21, at which time, the left bending degree of the left hinge unit 32 and the right bending degree of the right hinge unit 42 are minimized, the flexible support 5 is also minimized to minimize the bending degree, and thus the curvature of the flexible display panel 6 disposed thereon is minimized.

Then, when the curvature of the flexible display panel 6 of the variable curvature display 1000 is to be minimized (as shown in the figure)14) is adjusted to be larger or maximum (as shown in fig. 12), the control board 23 activates the motor 22 to drive the gear shaft 21 to rotate in a second rotating direction R2, the left rack plate 311 is disengaged from the second left position, the gear shaft 21 is disengaged from the second left end 31112 of the left rack 3111, the displacement of the left rack plate 311 further pulls the left connecting plate 321 pivoted to it in the left hinge unit 32, so that the first left hinge block 322 and the second left hinge block 323 in the left hinge unit 32 rotate relative to the left connecting plate 321, respectively, and the first left hinge angle sandwiched between the first left hinge block 322 and the second left hinge block 323 pivoted to each other is adjusted to be larger or maximum (as shown in fig. 12), so that the first left hinge angle is adjusted to be larger or maximum

Gradually decreasing, wherein the first left included angle θ 1 included between the two left connecting plates 321 which are linked with the first left hinge block 322 and the second hinge block 323 and pivoted with each other gradually decreases, so that the left bending degree of the left hinge unit 32 gradually increases; synchronously, the right rack 411 is disengaged from the second right position, the gear shaft 21 is disengaged from the second right end 41112 of the right rack 4111, the displacement of the right rack 411 further pulls the right connecting plate 421 pivotally connected to the right hinge unit 42, so that the first right hinge block 422 and the second right hinge block 423 in the right hinge unit 42 respectively rotate relative to the right connecting plate 421, and the first right hinge angle between the first right hinge block 422 and the second right hinge block 423 pivotally connected to each other

Gradually decreasing, and gradually decreasing the first right included angle θ 2 between the right connecting plates 421 linked with the first right hinge block 422 and the second right hinge block 423 and pivoted to each other, so that the right bending degree of the right hinge unit 42 is gradually increased, and the bending degree of the flexible supporting member 5 is also gradually increased, so as to gradually increase the curvature of the flexible display panel 6 disposed thereon, and after the curvature of the flexible display panel 6 reaches a proper size, the user can stop the operation of the motor 21 by controlling the control board 23.

Alternatively, if the gear shaft 21 is continuously rotated in the second rotating direction R2 until the left rack plate 311 moves from the second left position to the first left position, the second contact plate 82 is away from the second sensing element 72, and after the first contact plate 81 approaches the first sensing element 71, the control board 23 stops the motor 22 to stop the rotation of the gear shaft 21, at which time, the left bending degree of the left hinge unit 32 and the right bending degree of the right hinge unit 42 reach the maximum, which substantially jointly define a central angle of approximately 120 °, the flexible support 5 also reaches the maximum bending degree, and thus the curvature of the flexible display panel 6 disposed thereon reaches the maximum.

Claims

1. A variable curvature display disposed on a stand, the stand comprising a supporting member, the variable curvature display comprising:

the central structural part is arranged on the bearing part and comprises a fixed block;

an actuating unit arranged on the central structural member and comprising a gear shaft, wherein the gear shaft can rotate along a central axis;

the left hinge set is arranged on one side of the fixed block, is linked with the gear shaft and defines a left bending degree; and

the right hinge group is arranged on the other side of the fixed block, is linked with the gear shaft and defines a right bending degree;

a flexible support plate, which is arranged on the central structural member, the left hinge group and the right hinge group and can bend along with the left hinge group and the right hinge group; and

a flexible display panel disposed on the flexible supporting plate and capable of bending along with the flexible supporting plate and defining a curvature;

wherein, when this gear shaft rotated, it was organized and this right side hinge was made in this left side hinge of drive simultaneously to change this left crooked degree and this right crooked degree, borrow this camber of change.

2. The variable curvature display of claim 1, wherein the left hinge set comprises a left rack unit, at least one left hinge unit and a left edge unit interlocked with each other, the left rack unit having a left rack plate engaged with the pinion shaft, the left hinge unit being sandwiched between the left rack unit and the left edge unit, the right hinge set comprising a right rack unit, at least one right hinge unit and a right edge unit interlocked with each other, the right rack plate having a right rack plate engaged with the pinion shaft, the right hinge unit being sandwiched between the right rack plate and the right edge unit, the left rack plate being switchable between a first left position and a second left position by rotation of the pinion shaft, the right rack plate being switchable between a first right position and a second right position, the left rack plate being switchable between the first left position and the right rack plate when the left rack plate is in the first left position and the right rack plate is in the first right position, the left and right degrees of curvature are greatest, the curvature of the flexible display panel is greatest, and when the left rack plate is in the second left position and the right rack plate is in the second right position, the left and right degrees of curvature are least, and the curvature of the flexible display panel is least.

3. The variable curvature display of claim 2, wherein each of the left hinge units has a left connecting plate, a first left hinge block and a second left hinge block, the left connecting plate is disposed across the first left hinge block and the second left hinge block, the first left hinge block and the second left hinge block are pivotally connected to each other and can rotate relative to the left connecting plate, respectively, the left connecting plate closest to the left rack plate is pivotally connected to the left rack plate, and the first left hinge block closest to the fixed block is pivotally connected to the fixed block; each right hinging unit is provided with a right connecting plate, a first right hinging block and a second right hinging block, the right connecting plate is arranged on the first right hinging block and the second right hinging block in a crossing manner, the first right hinging block and the second right hinging block are mutually pivoted and can respectively rotate relative to the right connecting plate, the right connecting plate which is most adjacent to the right toothed bar plate is pivoted on the right toothed bar plate, and the first right hinging block which is most adjacent to the fixed block is pivoted on the fixed block.

4. The variable curvature display of claim 3, wherein the left hinge set further comprises a plurality of left positive rods and a plurality of left negative rods, the right hinge set further comprises a plurality of right positive rods and a plurality of right negative rods, the left link plate and the left rack plate are pivotally connected to one of the left negative rods, the first left hinge block and the second left hinge block are pivotally connected to one of the left positive rods, the right link plate and the right rack plate are pivotally connected to one of the right negative rods, and the first right hinge block and the second right hinge block are pivotally connected to one of the right positive rods.

5. The variable curvature display of claim 4, wherein the left edge unit comprises a first left end block pivotally connected to the left hinge unit farthest from the fixed block, and the right edge unit comprises a first right end block pivotally connected to the right hinge unit farthest from the fixed block.

6. The variable curvature display of claim 5, wherein any two adjacent left hinge units, the left connecting plates of each other being pivotally connected to one of the left anti-axle rods, the first left hinge block of one of the left hinge units and the second left hinge block of the other of the left hinge units being pivotally connected to one of the left positive axle rods; and the right connecting plates of any two adjacent right hinging units are pivoted on one of the right reverse shaft rods, and the first right hinging block of one of the right hinging units and the second right hinging block of the other right hinging unit are pivoted on one of the right forward shaft rods.

7. The variable curvature display of claim 6, wherein each left connecting plate has a first left arc through groove and a second left arc through groove, each first left hinge block has a first left bottom arc groove, each second left hinge block has a second left bottom arc groove, the left positive shaft is correspondingly inserted through the first left arc through groove and the second left arc through groove, the left negative shaft is correspondingly inserted through the first left bottom arc groove and the second left bottom arc groove, respectively; each right connecting plate is provided with a first right arc through groove and a second right arc through groove, each first right hinge block is provided with a first right bottom arc groove, each second right hinge block is provided with a second right bottom arc groove, the right positive shaft rod is correspondingly arranged in the first right arc through groove and the second right arc through groove respectively, and the right reverse shaft rod is correspondingly arranged in the first right bottom arc groove and the second right bottom arc groove respectively.

8. The variable curvature display of claim 7, wherein the left edge unit further comprises a left end plate and a second left end block, the left end plate straddles the first left end block and the second left end block, the first left end block and the second left end block are pivotally connected to each other and are capable of rotating with respect to the left end plate; the right end edge unit also comprises a right end plate and a second right end block, the right end plate is spanned on the first right end block and the second right end block, and the first right end block and the second right end block are mutually pivoted and can respectively rotate relative to the right end plate.

9. The variable curvature display of claim 8, wherein the first left arc perforation slot, the second left arc perforation slot, the first right arc perforation slot, and the second right arc perforation slot are all curved in a first direction, the first left bottom arc slot, the second left bottom arc slot, the first right bottom arc slot, and the second right bottom arc slot are all curved in a second direction, the first direction being opposite to the second direction;

each first left arc-through groove is respectively provided with a head end and a tail end, each second left arc-through groove is respectively provided with a head end and a tail end, each first left bottom arc-through groove is respectively provided with a head section and a tail section, each second left bottom arc-through groove is respectively provided with a head section and a tail section, each first right arc-through groove is respectively provided with a head end and a tail end, each second right arc-through groove is respectively provided with a head end and a tail end, each first right bottom arc-through groove is respectively provided with a head section and a tail section, each head end is close to the fixed block relative to each corresponding tail end, each head section is close to the fixed block relative to each corresponding tail section, when the left rack plate is at the left position of the first rack plate and the right rack plate is at the first right position, the left right arc-through groove and each left arc-through groove are respectively provided with a head end and a tail end shaft rod corresponding to the right arc-through groove, the left counter shaft rod and the right counter shaft rod are both at the corresponding head sections, when the left rack plate is at the second left position and the right rack plate is at the second right position, the left front shaft rod and the right front shaft rod are both at the corresponding head ends, and the left counter shaft rod and the right counter shaft rod are both at the corresponding tail sections;

10. The variable curvature display of any one of claims 4 to 9, wherein any two of the pivotally connected left connecting plates form a first left angle therebetween, and any two of the pivotally connected right connecting plates form a first right angle therebetween, wherein the first left angle is smallest and the first right angle is smallest when the left rack plate is in the first left position and the right rack plate is in the first right position, and wherein the first left angle is largest and the first right angle is largest when the left rack plate is in the second left position and the right rack plate is in the second right position.

11. The variable curvature indicator of claim 10, wherein the left rack plate has a first left through-slot, and the left counter shaft, to which the left connecting plate is pivotally connected, is inserted into the first left through-slot; the right rack plate is provided with a first right through groove, and the right connecting plate and the right reverse shaft rod pivoted with the right rack plate penetrate through the first right through groove.

12. The variable curvature display of claim 11, wherein the left rack plate further comprises a second left through-slot, the right rack plate further comprises a second right through-slot, the central structure further comprises a central shaft, the second left through-slot and the second right through-slot are at least partially overlapped, and the central shaft is inserted through the second left through-slot and the second right through-slot and fixed to the fixing block.

13. The variable curvature display of claim 12, wherein the left rack unit further has a left screw, the left rack plate further has a left rack, a left plate groove and a left plate body, the left rack is formed on the left plate body, and is engaged with the gear shaft, and has a first left end and a second left end, the left plate groove, the first left through groove and the second left through groove are formed on the left plate body, the left screw penetrates the left plate groove, the fixing block and the first left hinge block closest to the fixing block, and is movable relative to the left plate groove, the right rack unit further has a right screw, the right rack plate further has a right rack, a right plate groove and a right plate body, the right rack is formed on the right plate body, and is engaged with the gear shaft, and has a first right end and a second right end, the right plate groove, the first right through groove and the second right through groove are formed on the right plate body, the right screw penetrates through the right plate groove, the fixed block and the first right hinged block which is most adjacent to the fixed block, and can move relative to the right plate groove.

14. The variable curvature display of claim 13, wherein the flexible support plate is locked to the first left hinge block, the second left hinge block, the fixed block, the first right hinge block and the second right hinge block and can bend to change the curvature as the left bending degree of the left hinge unit and the right bending degree of the right hinge unit change;

the left rack plate is arranged at the first left position, the right rack plate is arranged at the second right position, the first left hinge angle is the smallest and the first right hinge angle is the smallest when the left rack plate is arranged at the first left position and the right rack plate is arranged at the first right position, and the first left hinge angle is the largest and the first right hinge angle is the largest when the left rack plate is arranged at the second left position and the right rack plate is arranged at the second right position.

15. The variable curvature display of claim 14, further comprising a sensing unit and a triggering member, wherein the sensing unit is disposed on the fixing block, the triggering member is disposed on the left hinge set or the right hinge set, the actuating unit further comprises a motor and a control board, the motor is used to drive the gear shaft to rotate, the control board is in signal connection with the sensing unit and the motor, when the triggering member triggers the sensing unit, the sensing unit generates a stop signal to the control board, and the control board controls the motor to stop operating.