Knob device with display screen

Abstract

The utility model discloses a knob device with a display screen, which belongs to the technical field of knobs and comprises a PCB (printed circuit board), an encoder, a first support, the display screen, an outer glass plate, a second support and a knob ring, and the first support comprises a support frame and a limit ring plate detachably connected with the support frame. According to the utility model, the display screen can be conveniently embedded into the first bracket; the shape of the limiting hole in the limiting ring plate corresponds to the shape of the display screen, different limiting holes only need to be formed in the limiting ring plate according to the display screens of different sizes, and the manufacturing cost is reduced; the device is compact in structure, convenient to disassemble and assemble and suitable for washing machines, dishwashers, water heaters and other household appliances.

Description

Technical Field

[0001] The utility model belongs to the technical field of knobs, and particularly relates to a knob device with a display screen. Background Art

[0002] At present, knobs with display screens are widely used in household appliances such as washing machines, microwave ovens, and ovens. Since the knob has a display screen in the middle, it can save design space and has a beautiful appearance, so it is becoming more and more widely used in household appliances. At present, due to the difference in the sizes of display screens suitable for different household appliances, it is necessary to redesign the sizes of the internal encoder and the external knob ring according to the size of the display screen, and different molds and parts are required, resulting in an increase in manufacturing costs. Content of the Utility Model

[0003] The technical problem solved by the utility model is to provide a knob device with a display screen that can adapt to different models of display screens.

[0004] Technical Solution: To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A knob device with a display screen, comprising a PCB board, an encoder connected to the PCB board, a first bracket fixedly connected to the encoder, a display screen embedded in the first bracket, an outer glass plate connected to the first bracket, a second bracket movably connected to the encoder, and a knob ring connected to the second bracket. The first bracket includes a support frame and a limit ring plate detachably connected to the support frame.

[0006] Further, the limit ring plate and the display screen are in the same plane.

[0007] Further, the limit ring plate is provided with insertion posts, and the support frame is provided with insertion holes corresponding to the insertion posts.

[0008] Further, the limit ring plate is provided with limit holes corresponding to the display screen.

[0009] Further, the display screen is a circular screen, the display screen is provided with a notch, and the limit ring plate is provided with a first protrusion protruding towards the limit hole and corresponding to the notch.

[0010] Further, the support frame is provided with a plurality of support blocks for supporting the display screen, and the plurality of support blocks are arranged in a circular array on the support frame.

[0011] Further, the encoder includes a fixed ring and a movable ring rotatably connected to the fixed ring. The first bracket is connected to the fixed ring, and the second bracket is connected to the movable ring.

[0012] Further, it further includes a housing and a panel detachably connected to the housing, and grooves corresponding to the PCB board and the encoder are provided on the panel.

[0013] Further, a first claw is provided on the first bracket, and a first hole corresponding to the first claw is provided in the groove.

[0014] Further, the display screen is a TFT display screen.

[0015] Beneficial effects: Compared with the prior art, the present utility model has the following advantages:

[0016] 1. By providing the first bracket, which includes a support frame and a limiting ring plate, it is convenient for the display screen to be embedded on the first bracket;

[0017] 2. The shape of the limiting holes on the limiting ring plate corresponds to the shape of the display screen. Different limiting holes only need to be opened on the limiting ring plate according to display screens of different sizes, reducing the manufacturing cost;

[0018] 3. The structure is compact, easy to disassemble and assemble, and is applicable to household appliances such as washing machines, dishwashers, and water heaters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the back structure of the knob in the embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of the front structure of the knob in the embodiment;

[0021] Figure 3 is a schematic diagram of the structure of the knob in the embodiment after hiding the outer glass plate;

[0022] Figure 4 is a schematic diagram of the structure of the first bracket in the embodiment;

[0023] Figure 5 is a schematic diagram of the structure of the limiting ring plate in the embodiment;

[0024] Figure 6 is a schematic diagram of the structure of the support frame in the embodiment;

[0025] Figure 7 is a schematic diagram of the structure of the second bracket in the embodiment;

[0026] Figure 8 is a schematic diagram of the structure of the second bracket from another angle in the embodiment;

[0027] Figure 9 is a schematic diagram of the structure of the PCB board and the encoder in the embodiment;

[0028] Figure 10 is a schematic diagram of the overall structure of the device in the embodiment;

[0029] Figure 11 is Figure 10 A cross-sectional view of the panel along the A-A line;

[0030] Figure 12 is a schematic diagram of the cross-sectional structure of the knob. Specific embodiments

[0031] The following combines specific embodiments to further clarify the present invention. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0032] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 10 、 Figure 11 and Figure 12 shown, a knob device with a display screen includes a PCB board 1, an encoder 2, a first bracket 3, a display screen 4, an outer glass plate 5, a second bracket 6, a knob ring 7, a housing 8 and a panel 9. The knob device with a display screen in this embodiment is used on a washing machine as a control knob for the washing machine. When in use, the PCB board 1, the encoder 2, the first bracket 3, the display screen 4, the outer glass plate 5, the second bracket 6 and the knob ring 7 form a knob. The housing 8 is snap-connected to the panel 9, and the housing 8 and the panel 9 are respectively connected to other components of the washing machine by means of bolt connection or snap connection. The panel 9 is provided with grooves 91 corresponding to the PCB board 1 and the encoder 2. The first bracket 3 is provided with two first claws 33, and the grooves 91 are provided with corresponding claw holes 331. During assembly, the knob is moved into the grooves 91, and the two claws 33 are snap-connected to the claw holes 331, and the PCB board 1 and the encoder 2 are accommodated in the grooves 91.

[0033] As Figure 8 and Figure 9 shown, the PCB board 1 is a circular circuit board. The encoder 2 is connected to the front surface of the PCB board 1. The encoder 2 uses an existing encoder that converts angular displacement into an electrical signal. The encoder 2 includes a fixed ring 21 and a movable ring 22. There is a first intermediate through hole in the middle of the encoder 2. The fixed ring 21 includes a first fixed ring on the outer circle and a second fixed ring 211 in the middle. The second fixed ring 211 protrudes outward. The movable ring 22 is sleeved on the second fixed ring 211. The movable ring 22 can rotate relative to the fixed ring 21. When the movable ring 22 rotates, the electrical signal output of the encoder 2 changes. The movable ring 22 is provided with a plurality of first buckle holes 221. The second bracket 6 is annular. The inner circle of the second bracket 6 is provided with first buckle claws corresponding to the first buckle holes 221. Thus, the second bracket 6 is snap-connected to the movable ring 22, and when the second bracket 6 rotates, it can drive the movable ring 22 to rotate.

[0034] AsFigure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9As shown, the first bracket 3 includes a support frame 31 and a limiting ring plate 32. The main body of the support frame 31 is annular. The inner circle of the support frame 31 is a second intermediate through-hole. At the outer circumference of the second intermediate through-hole of the support frame 31, there are two first claws 33 protruding towards the back. The inner circle of the support frame 31 also has a first limiting plate 34 protruding towards the back. On the inner wall of the first intermediate through-hole of the encoder 2, there is a first limiting groove 212 corresponding to the first limiting plate 34. The first limiting plate 34 is inserted into the first limiting groove 212, so that the support frame 31 is connected to the encoder 2. On the PCB board 1, there are two second through-holes corresponding to the two first claws 33. When the support frame 31 is connected to the encoder 2, the first claws 33 pass through the second through-holes, which facilitates the clamping connection between the first claws 33 and the clamping holes 331 on the panel 9. The first limiting plate 34 also has a first threaded hole. Corresponding bolt holes are respectively provided on the panel 9 and the PCB board 1. After the first claws 33 of the support frame 31 are clamped with the panel 9, the support frame 31 can be connected to the panel 9 by bolts passing through the panel 9 and the PCB board 1 and connecting to the first threaded hole, so as to connect the knob as a whole to the panel 9. The limiting ring plate 32 is detachably connected to the support frame 31. The display screen 4 is embedded in the first bracket 3. In this embodiment, the display screen 4 is circular. The display screen 4 is a TFT screen. There is a notch on the display screen 4. On the limiting ring plate 32, there is a limiting hole 322 corresponding to the display screen 4. On the limiting ring plate 32, there is a first protruding portion 321 protruding towards the limiting hole 322 and corresponding to the notch. Thus, the limiting hole 322 restricts the position of the display screen 4 to prevent the display screen 4 from moving. The shape of the limiting hole 322 can be adjusted according to the shape of the display screen 4, so that different sizes of display screens can be applied. When it is necessary to replace the display screen with other models, only the shape of the limiting hole 322 on the limiting ring plate 32 needs to be adjusted. The manufacturing molds of the device components can be universal, only the shape of the opening on the limiting ring plate 32 is adjusted, thus reducing the overall manufacturing cost. On the front surface of the support frame 31, there is a groove corresponding to the display screen 4 for accommodating the display screen 4. There are a plurality of support blocks 312 in the groove of the support frame 31. The plurality of support blocks 312 are arranged in a circular array on the support frame 31. When the display screen 4 is located in the groove of the support frame 31, the support blocks 312 are used to support the display screen 4. On the back surface of the limiting ring plate 32, there are a plurality of insertion posts 323. On the support frame 31, there are insertion holes 311 corresponding to the insertion posts. When the plurality of insertion posts 323 are inserted into the corresponding insertion holes 311, the limiting ring plate 32 is connected to the support frame 31. A wiring socket is reserved at the notch of the display screen 4. The wiring passes through the second intermediate through-hole of the support frame 31 and the first intermediate through-hole of the encoder 2. The other end of the wiring is plugged into the PCB board 1. The display screen 4 is connected to the PCB board 1 through the wiring. The front surface of the display screen 4 and the front surface of the limiting ring plate 32 are in the same plane. The front surface of the limiting ring plate 32 is connected to the outer glass plate 5 by glue. The outer glass plate 5 is transparent and provides protection for the display screen 4.

[0035] As Figure 1 , Figure 7 andFigure 12 As shown, four second buckle holes 61 are provided on the second bracket 6, and second buckle claws corresponding to the second buckle holes 61 are provided on the inner wall of the button loop 7. The button loop 7 is sleeved on the second bracket 6 by connecting the second buckle claws with the second buckle holes 61. When a person manually rotates the button loop 7, the button loop 7 drives the second bracket 6 to rotate, and the second bracket 6 drives the movable loop 22 of the encoder 2 to rotate, thereby changing the output signal of the encoder 2.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A knob device with a display screen, characterized in that: The invention comprises a PCB board (1), an encoder (2) connected to the PCB board (1), a first bracket (3) fixedly connected to the encoder (2), a display screen (4) embedded in the first bracket (3), an outer glass plate (5) connected to the first bracket (3), a second bracket (6) movably connected to the encoder (2), and a button ring (7) connected to the second bracket (6); the first bracket (3) comprises a support frame (31) and a limit ring plate (32) detachably connected to the support frame (31).

2. The knob device with a display screen according to claim 1, characterized in that: The limiting ring plate (32) and the display screen (4) are located in the same plane.

3. The knob device with a display screen according to claim 2, characterized in that: The limiting ring plate (32) is provided with a plugging pile (323), and the supporting frame (31) is provided with a plugging hole (311) corresponding to the plugging pile (323).

4. The knob device with a display screen according to claim 1, characterized in that: The limiting ring plate (32) is provided with a limiting hole (322) corresponding to the display screen (4).

5. The knob device with a display screen according to claim 4, characterized in that: The display screen (4) is a circular screen, a notch is provided on the display screen (4), and the limiting ring plate (32) is provided with a first protrusion (321) that protrudes toward the limiting hole (322) and corresponds to the notch.

6. The knob device with a display screen according to claim 1, characterized in that: The support frame (31) is provided with a plurality of support blocks (312) for supporting the display screen (4); the plurality of support blocks (312) are arranged in a ring array on the support frame (31).

7. The knob device with a display screen according to claim 1, characterized in that: The encoder (2) comprises a fixed ring (21) and a movable ring (22) rotatably connected to the fixed ring (21); the first bracket (3) is connected to the fixed ring (21); and the second bracket (6) is connected to the movable ring (22).

8. The knob device with a display screen according to claim 1, characterized in that: It also comprises a housing (8) and a panel (9) detachably connected to the housing (8), wherein the panel (9) is provided with grooves (91) corresponding to the PCB board (1) and the encoder (2).

9. The knob device with a display screen according to claim 8, characterized in that: The first bracket (3) is provided with a first clamping claw (33), and the groove (91) is provided with a first clamping hole (331) corresponding to the first clamping claw (33).

10. The knob device with a display screen according to claim 1, characterized in that: The display screen (4) is a TFT display screen.

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