Canvas driving device and electric photo frame

Abstract

The utility model discloses a canvas driving device and an electric photo frame, and relates to the technical field of canvas driving. The canvas driving device comprises a roller frame, a first rotating roller, a second rotating roller and a driving mechanism, the first rotating roller and the second rotating roller are installed on the roller frame in parallel and used for installing canvas to be displayed, and the driving mechanism is in transmission connection with the first rotating roller and the second rotating roller. The driving mechanism is used for driving the first rotating roller and the second rotating roller to rotate synchronously so that the canvas can be movably displayed in the preset direction. According to the canvas driving device, the driving mechanism can drive the first rotating roller and the second rotating roller to rotate synchronously, so that the dragging acting force on the canvas is reduced, the first rotating roller and the second rotating roller can rotate and stop synchronously, the canvas has good smoothness in the display process, and the display effect is improved. Therefore, the display quality of the canvas in the electric photo frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of canvas driving, in particular to a canvas driving device and an electric photo frame. Background Art

[0002] Electric photo frames are modern photo frames that use motors to drive the canvas to rotate. In order to achieve the rotating display effect of the canvas, reciprocating motion is usually used, that is, the mechanical structure is used to make the canvas move back and forth within a certain range, thereby simulating the rotation effect of the canvas. However, this method has obvious limitations. There is a pulling force on the canvas during the rotation process; when the rotation stops, the inertia of the rotation will cause wrinkles on the canvas, affecting the user's viewing experience.

[0003] Therefore, how to improve the display quality of the canvas in the electric photo frame is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model provides a canvas driving device and an electric photo frame, which can improve the display quality of the canvas in the electric photo frame.

[0005] The utility model embodiment provides the following scheme:

[0006] In a first aspect, an embodiment of the utility model provides a canvas driving device, the device comprising:

[0007] Roller rack;

[0008] A first rotating roller is mounted on the roller frame;

[0009] The second rotating roller is installed on the roller frame and is arranged in parallel with the first rotating roller. The first rotating roller and the second rotating roller are used to install the canvas to be displayed;

[0010] The driving mechanism is connected to the first rotating roller and the second rotating roller in a transmission manner. The driving mechanism is used to drive the first rotating roller and the second rotating roller to rotate synchronously so that the canvas can be moved and displayed along a preset direction.

[0011] In an optional embodiment, the canvas is in a closed strip structure; the device further comprises:

[0012] The first drawing roller is installed on the roller frame and is arranged parallel to the first rotating roller;

[0013] The second painting roller is installed on the roller frame and is arranged parallel to the first rotating roller. The canvas is installed around the first painting roller and the second painting roller.

[0014] In an optional embodiment, the canvas is in a closed strip structure; the device further comprises:

[0015] The tension component is installed on the roller frame, and is used to apply tension to the canvas when it is moving for display, so that the surface tension of the canvas is greater than the tension threshold.

[0016] In an optional embodiment, the tension assembly includes:

[0017] A tension roller, both ends of which are respectively installed in a first mounting hole and a second mounting hole preset on the roller frame, and are arranged parallel to the first rotating roller;

[0018] a first spring connected to one end of the tension roller;

[0019] A second spring is connected to the other end of the tension roller.

[0020] In an optional embodiment, the first mounting hole and the second mounting hole are both waist-shaped holes, and the length direction of the waist-shaped holes is perpendicular to the axial direction of the first rotating roller.

[0021] In an optional embodiment, the driving mechanism includes:

[0022] A motor, wherein the output shaft of the motor is drivingly connected to the first rotating roller;

[0023] A control terminal connected to a power port of the motor;

[0024] A driving wheel, mounted on the end of the first rotating roller;

[0025] A driven wheel is mounted on the end of the second rotating roller, and the driving wheel and the driven wheel are located on the same side of the first rotating roller and the second rotating roller;

[0026] Transmission parts connect the driving wheel and the driven wheel.

[0027] In an optional embodiment, the transmission member is one of a connecting rod, a synchronous belt, and a ball chain.

[0028] In an optional embodiment, the roller frame includes:

[0029] A pair of crossbeams and a pair of longitudinal beam assemblies, the crossbeams and the longitudinal beam assemblies are connected end to end to assemble a rectangular roller frame; the longitudinal beam assembly includes at least two longitudinal beam sections of spliced ​​structure, which are used to adjust the assembly length of the longitudinal beam assembly after completion of assembly.

[0030] In an optional embodiment, the longitudinal beam assembly includes:

[0031] a first longitudinal beam section connected to an end of one of the transverse beams;

[0032] a second longitudinal beam section connected to an end of another transverse beam;

[0033] The adjusting section has one end connected to the first longitudinal beam section and the other end connected to the second longitudinal beam section.

[0034] In a second aspect, an embodiment of the utility model further provides an electric photo frame, which includes any canvas driving device in the first aspect.

[0035] Compared with the prior art, the canvas driving device and the electric photo frame of the utility model have the following advantages:

[0036] The canvas driving device of the utility model comprises a roller frame, a first rotating roller, a second rotating roller and a driving mechanism, wherein the first rotating roller and the second rotating roller are installed on the roller frame in parallel, the first rotating roller and the second rotating roller are used to install the canvas to be displayed, the driving mechanism is connected with the first rotating roller and the second rotating roller in a transmission manner, and the driving mechanism is used to drive the first rotating roller and the second rotating roller to rotate synchronously, so that the canvas is moved and displayed along a preset direction. Since the canvas driving device can drive the first rotating roller and the second rotating roller to rotate synchronously through the driving mechanism, the pulling force on the canvas is reduced, and the first rotating roller and the second rotating roller can be synchronously rotated and stopped, the canvas has better flatness during the display process, thereby improving the display quality of the canvas in the electric photo frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of the three-dimensional structure of the canvas driving device provided in the embodiment of the utility model Figure 1 ;

[0039] Figure 2 A schematic diagram of the three-dimensional structure of the canvas driving device provided in the embodiment of the utility model Figure 2 ;

[0040] Figure 3 A schematic diagram of the three-dimensional structure of a roller frame provided in an embodiment of the utility model;

[0041] Figure 4-1 A side schematic diagram of a longitudinal beam assembly provided in an embodiment of the utility model;

[0042] Figure 4-2 A schematic diagram of the installation structure of the canvas provided in an embodiment of the utility model.

[0043] Explanation of the reference numerals: 101 - tension assembly, 102 - driving mechanism, 103 - roller frame, 104 - first rotating roller, 105 - second rotating roller, 106 - cross beam, 107 - longitudinal beam assembly, 108 - first longitudinal beam section, 109 - second longitudinal beam section, 110 - adjustment section, 111 - screw hole, 112 - plug connector, 113 - bearing hole, 114 - driving wheel, 115 - driven wheel, 116 - transmission member, 117 - first drawing roller, 118 - second drawing roller, 119 - tension roller, 120 - first spring, 121 - second spring, 122 - first mounting hole, 123 - second mounting hole, 124 - canvas. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model belong to the scope of protection of the embodiments of the utility model.

[0045] The pulling force when the canvas moves will bring a series of problems. First, it may cause the canvas to deform, especially in the case of long-term use or frequent rotation, the edge of the canvas may be stretched or twisted, affecting the display effect. Secondly, the pulling force may also cause physical damage to the canvas, such as tearing, wear, etc., shortening the service life of the canvas. In addition, due to the unevenness of the pulling force, it may also cause uneven tension on the canvas during the rotation process, further aggravating the deformation and damage of the canvas. Therefore, it is necessary to reduce the pulling force when the canvas moves. The following embodiments of the utility model will specifically explain how to solve the above technical problems.

[0046] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 A schematic diagram of a canvas driving device provided in an embodiment of the utility model Figure 1 and hint Figure 2 The canvas driving device includes a roller frame 103, a first rotating roller 104, a second rotating roller 105 and a driving mechanism 102.

[0047] The first rotating roller 104 is installed on the roller frame 103; the second rotating roller 105 is also installed on the roller frame 103 and is arranged parallel to the first rotating roller 104, and the first rotating roller 104 and the second rotating roller 105 are used to install the canvas to be displayed; the driving mechanism is transmission-connected with the first rotating roller and the second rotating roller, and the driving mechanism is used to drive the first rotating roller 104 and the second rotating roller 105 to rotate synchronously, so that the canvas can be moved along a preset direction for display.

[0048] The roller frame 103 can be made by welding square tubes, for example, by splicing four square tubes end to end, and then welding a rectangular roller frame 103. The driving mechanism 102 can be set as a sprocket structure, for example, a driving wheel 114 is installed at the end of the first rotating roller 104, and a driven wheel 115 is installed on the second rotating roller 105. The driving wheel 114 and the driven wheel 115 are driven by a chain, and the driving wheel 114 is driven by a motor to rotate, thereby realizing the synchronous rotation of the first rotating roller 104 and the second rotating roller 105. Since the first rotating roller 104 and the second rotating roller 105 can rotate synchronously, the stretching force on the canvas when it moves is small, and the canvas will not be stretched and extended, or the motor will be damaged due to excessive load. Therefore, the canvas driving device of the utility model has a longer service life. At the same time, there is a large format between the first rotating roller 104 and the second rotating roller 105, which can realize a large-format display of the canvas.

[0049] In practical applications, since there are various specifications of the canvas driving device, in order to display images on canvases of different specifications, if the roller frame is welded as a fixed structure, the canvas driving device will not be applicable to displaying canvases of different specifications. Based on this, in a specific embodiment, the roller frame 103 includes a pair of cross beams 106 and a pair of longitudinal beam assemblies 107, see Figure 3 , Figure 3 The figure is a schematic diagram of the three-dimensional structure of the roller frame 103. The roller frame 103 is a rectangular structure, and there are two cross beams 106 and two longitudinal beam assemblies 107. The cross beams 106 and the longitudinal beam assemblies 107 are connected end to end to assemble the roller frame 103 into a rectangular structure. Screw holes 111 can be processed at both ends of the longitudinal beam assemblies 107, and the longitudinal beam assemblies 107 and the ends of the cross beams 106 are fixedly connected through the screw holes 111. The longitudinal beam assembly 107 includes at least two longitudinal beam sections of a spliced ​​structure. By adjusting the length of one longitudinal beam section, the length of the longitudinal beam assembly 107 after assembly can be adjusted, so that the roller frame 103 can be adapted to canvas displays of different specifications.

[0050] Exemplarily, the longitudinal beam assembly 107 includes a first longitudinal beam segment 108, a second longitudinal beam segment 109 and an adjustment segment 110. The first longitudinal beam segment 108 is connected to the end of one of the cross beams; the second longitudinal beam segment 109 is connected to the end of the other cross beam; one end of the adjustment segment 110 is connected to the first longitudinal beam segment 108, and the other end is connected to the second longitudinal beam segment 109. Figure 4-1 , Figure 4-1: is a structural schematic diagram of the longitudinal beam assembly 107, the adjustment section 110 can be set as a hollow square tube, the first longitudinal beam section 108 and the second longitudinal beam section 109 are made of engineering plastics or aluminum alloy, and the first longitudinal beam section 108 and the second longitudinal beam section 109 are processed into a plug connector 112 at one end close to the adjustment section 110. The plug connector 112 is a step structure, and the plug connector 112 is assembled into the adjustment section 110. Since the first longitudinal beam section 108 is used to install the first rotating roller 104, and the second longitudinal beam section 109 is used to install the second rotating roller 105, a bearing hole 113 can be processed on each longitudinal beam section, and the bearing is assembled in the bearing hole 113, and the end of the rotating roller is installed in the bearing to reduce the rotation resistance of the rotating roller.

[0051] Exemplarily, the driving mechanism 102 includes a motor, a control terminal, a driving wheel 114, a driven wheel 115, and a transmission member 116. The output shaft of the motor is connected to the first rotating roller 104 in a transmission manner; the control terminal is connected to the power port of the motor; the driving wheel 114 is installed at the end of the first rotating roller 104; the driven wheel 115 is installed at the end of the second rotating roller 105, and the driving wheel 114 and the driven wheel 115 are located on the same side of the first rotating roller 104 and the second rotating roller 105; the transmission member 116 connects the driving wheel 114 and the driven wheel 115. Please continue to refer to Figure 4, the ends of the first rotating roller 104 and the second rotating roller 105 both extend to the outside of the roller frame 103, the driving wheel 114 is installed at the end of the first rotating roller 104 outside the roller frame 103, and the driven wheel 115 is installed at the end of the second rotating roller 105 outside the roller frame 103, which can be fixed by a keyway structure or a polygonal structure. The transmission member 116 is one of a connecting rod, a synchronous belt, and a ball chain, which can drive the first rotating roller 104 and the second rotating roller 105 to rotate synchronously. The ball chain shown in the figure has the characteristics of no rotation dead point and lightweight, and is suitable for large-scale industrial application when such products are mass-produced. The motor can adopt a DC motor module composed of a reducer, or a motor module including an encoder. The encoder can be used to determine the running state of the motor and the number of rotations of the motor. The control terminal can be a controller composed of a power supply, a single-chip microcomputer, and a drive board. The power supply is connected to the single-chip microcomputer and the drive board, and the drive board is connected to the motor. The single-chip microcomputer can control the drive board to output forward pulses and reverse pulses to realize the forward and reverse drive control of the motor; it can also be a controller composed of a power supply and a switch, which can control the motor to rotate.

[0052] It should be noted that when a ball chain is used as the transmission member 116, the driving wheel 114 and the driven wheel 115 use rotating wheels provided with slots, and the slots are engaged with the beads of the ball chain to achieve synchronous rotation of the first rotating roller 104 and the second rotating roller 105.

[0053] The working process of the canvas driving device will be described below. The display device can be used for reciprocating display of a canvas with a planar structure, and can also be used for unidirectional or reciprocating display of a canvas with a closed belt structure. Taking the reciprocating display of a canvas with a planar structure as an example, the two ends of the canvas are wrapped around the first rotating roller 104 and the second rotating roller 105. When the canvas needs to be moved and displayed, the driving mechanism 102 is powered on, and the driving mechanism 102 drives the first rotating roller 104 and the second rotating roller 105 to rotate synchronously. When the rotation time or the measured number of rotations reaches the corresponding set threshold, the driving mechanism 102 is controlled to reverse, and the canvas moves in the opposite direction, so that the canvas moves back and forth periodically, and the user can observe the image displayed on the canvas. Of course, it can also be applied to a closed belt-shaped structure canvas for unidirectional or reciprocating display. The closed belt-shaped structure canvas is mounted on the first rotating roller 104 and the second rotating roller 105, the driving mechanism 102 is powered on, and the second rotating roller 104 and the second rotating roller 105 rotate synchronously, and the canvas moves for display. The display method can be a continuous unidirectional display, or the motor can be controlled to rotate periodically based on actual needs to achieve reciprocating display of the canvas.

[0054] Exemplarily, the control terminal includes a power interface and a control button, and the power interface is used to connect a preset DC power supply. The type of power interface can be selected based on actual needs, such as a TYPE-C interface, a USB interface, etc., and the DC power supply can be a power bank or a power adapter. The control button can select a normally closed mechanical switch, the input end of the control button is connected to the power interface, and the output end of the control button is connected to the power port of the motor. After the control button is pressed, the DC power supply is connected to the motor, and the motor starts to rotate; conversely, when the control button is not pressed, the motor stops rotating because the motor is not connected to the power supply.

[0055] In order to improve the applicability of the driving mechanism 102 in different display scenarios, the driving mechanism 102 also includes a battery box, which is installed between the sides of the roller frame 103. The battery box can be vertically installed on the side of the roller frame 103, and the battery box is electrically connected to the control terminal. After the dry battery is installed in the battery box, the motor can be powered on through the control terminal to realize the start and stop control of the motor.

[0056] In practical application, for a canvas in a closed strip structure, if only the first rotating roller 104 and the second rotating roller 105 are provided, the length of the displayed canvas is relatively limited. Based on this, in a specific embodiment, the canvas is in a closed strip structure, and the outer surface of the canvas is the image to be displayed; the canvas driving device further includes a first drawing roller 117 and a second drawing roller 118. Please continue to refer to Figure 1 and Figure 2, the first drawing roller 117 is installed on the roller frame 103 and is arranged in parallel with the first rotating roller 104, and the first drawing roller 117 is installed close to the first rotating roller 104; the second drawing roller 118 is installed on the roller frame 103 and is arranged in parallel with the first rotating roller 104, and the second drawing roller 118 is installed close to the second rotating roller 105. In order to make the canvas display more images, the canvas is installed around the first drawing roller 117 and the second drawing roller 118 in a circuitous manner. There is no specific limitation on the circuitous installation method, as long as the display length of the canvas can be increased. In order to make the canvas traction smoother, the diameters of the first rotating roller and the second rotating roller can be set larger, and the contact area between the rotating roller and the canvas can be increased to increase the friction force of traction canvas movement. Of course, a flexible plastic layer can also be laid on the first rotating roller and the second rotating roller, which can also increase the friction force of traction canvas movement.

[0057] Since the canvas needs to be pulled and moved by the first rotating roller 104 and the second rotating roller 105, if the tension of the canvas is small, it may cause insufficient friction between the rotating roller and the canvas, resulting in interruption of movement or even inability to move. Based on this, in a specific embodiment, the canvas is in a closed belt-shaped structure; the canvas driving device also includes a tension component 101, and the tension component 101 is installed on the roller frame. The tension component is used to apply tension to the canvas when it is moving for display, so that the surface tension of the canvas is greater than the tension threshold. The tension component can be a tension roller, and an elastic element can also be set to adjust the distance between the first rotating roller 104 and the second rotating roller 105 to achieve tension adjustment of the canvas. For example, the two mounting holes on the mounting roller frame 103 for mounting the second rotating roller 105 are both set as waist-shaped holes, and a deformation force is applied to the second rotating roller 105 through an elastic element to adjust the tension of the canvas.

[0058] Exemplarily, the tension assembly 101 also includes a tension roller 119, a first spring 120 and a second spring 121. The two ends of the tension roller 119 are respectively installed in the first mounting hole 122 and the second mounting hole 123 preset on the roller frame 103, and are arranged in parallel with the first rotating roller 104. The first mounting hole 122 and the second mounting hole 123 are both set as waist-shaped holes, and their length directions are set along the length direction of the roller frame 103, that is, the length direction of the waist-shaped holes is perpendicular to the axial direction of the first rotating roller. The first spring 120 is connected to one end of the tension roller 119; the second spring 121 is connected to the other end of the tension roller 119. The first spring 120 and the second spring 121 can be selected as compression springs or tension springs based on actual needs, as long as they can apply elastic force to the tension roller 119. Please refer to Figure 4-1 and 4-2The tension of the canvas 124 can be increased by the tension roller 119, so that the canvas 124 is closely attached to the first rotating roller 104, the second rotating roller 105, the first drawing roller 117 and the second drawing roller 118, so that the canvas 124 moves more stably, is displayed more smoothly, and the display quality of the canvas 124 is improved. When the canvas 124 is displayed, the surface between the first rotating roller 104 and the second rotating roller 105 that has not passed through the tension roller 119 can be used as the display surface of the canvas to increase the display area of ​​the canvas.

[0059] Based on the same technical concept as the canvas driving mechanism, the embodiment of the utility model also provides an electric photo frame, which includes any canvas driving device. The electric photo frame can be installed on a wall as a wall electric photo frame; it can also be placed on a desktop or on the ground to display images, and its application scenario is not specifically limited here.

[0060] The technical solution provided in the embodiment of the utility model has at least the following technical effects or advantages:

[0061] The canvas driving device comprises a roller frame, a first rotating roller, a second rotating roller and a driving mechanism, wherein the first rotating roller and the second rotating roller are installed on the roller frame in parallel, the first rotating roller and the second rotating roller are used to install the canvas to be displayed, the driving mechanism is connected to the first rotating roller and the second rotating roller by transmission, and the driving mechanism is used to drive the first rotating roller and the second rotating roller to rotate synchronously, so that the canvas is moved and displayed along a preset direction. The canvas driving device can drive the first rotating roller and the second rotating roller to rotate synchronously through the driving mechanism, thereby reducing the pulling force on the canvas, and can realize the synchronous rotation and stop of the first rotating roller and the second rotating roller, so that the canvas has better flatness during the display process, thereby improving the display quality of the canvas in the electric photo frame.

[0062] Although the preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A canvas driving device, characterized in that: The device comprises: Roller rack; A first rotating roller is mounted on the roller frame; A second rotating roller is mounted on the roller frame and is arranged in parallel with the first rotating roller, wherein the first rotating roller and the second rotating roller are used to mount the canvas to be displayed; A driving mechanism is connected to the first rotating roller and the second rotating roller in a transmission manner, and is used to drive the first rotating roller and the second rotating roller to rotate synchronously, so that the canvas moves and is displayed along a preset direction.

2. The canvas driving device according to claim 1, characterized in that: The canvas is in a closed belt-shaped structure; the device also includes: A first drawing roller, mounted on the roller frame and arranged parallel to the first rotating roller; The second painting roller is installed on the roller frame and is arranged parallel to the first rotating roller. The canvas is installed around the first painting roller and the second painting roller.

3. The canvas driving device according to claim 1, characterized in that: The canvas is in a closed belt-shaped structure; the device also includes: A tension component is installed on the roller frame, and is used to apply tension to the canvas when it is moving for display, so that the surface tension of the canvas is greater than a tension threshold.

4. The canvas driving device according to claim 3, characterized in that: The tension assembly comprises: A tension roller, the two ends of which are respectively installed in a first mounting hole and a second mounting hole preset on the roller frame, and are arranged parallel to the first rotating roller; A first spring connected to one end of the tension roller; The second spring is connected to the other end of the tension roller.

5. The canvas driving device according to claim 4, characterized in that: The first mounting hole and the second mounting hole are both waist-shaped holes, and the length direction of the waist-shaped holes is perpendicular to the axial direction of the first rotating roller.

6. The canvas driving device according to claim 1, characterized in that: The driving mechanism comprises: A motor, wherein an output shaft of the motor is drivingly connected to the first rotating roller; A control terminal connected to a power port of the motor; A driving wheel, mounted on the end of the first rotating roller; A driven wheel is mounted on an end of the second rotating roller, wherein the driving wheel and the driven wheel are located on the same side of the first rotating roller and the second rotating roller; A transmission member connects the driving wheel and the driven wheel.

7. The canvas driving device according to claim 6, characterized in that: The transmission member is one of a connecting rod, a synchronous belt and a ball chain.

8. The canvas driving device according to claim 1, characterized in that: The roller frame comprises: A pair of cross beams and a pair of longitudinal beam assemblies, wherein the cross beams are connected end to end with the longitudinal beam assemblies to assemble into a rectangular roller frame; the longitudinal beam assembly comprises at least two longitudinal beam sections of a spliced ​​structure for adjusting the assembly length of the longitudinal beam assembly after assembly.

9. The canvas driving device according to claim 8, characterized in that: The longitudinal beam assembly comprises: a first longitudinal beam section connected to an end of one of the transverse beams; a second longitudinal beam section connected to an end of another transverse beam; An adjustment section, one end of which is connected to the first longitudinal beam section, and the other end of which is connected to the second longitudinal beam section.

10. An electric photo frame, characterized in that: The electric photo frame comprises the canvas driving device described in any one of claims 1-9.

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