Waterproof knob

Abstract

The utility model relates to the field of knobs, in particular to a waterproof knob, which comprises a knob mechanism, a PCB (Printed Circuit Board) and an upper shell, the upper shell is arranged in the rotary knob mechanism, an installation convex ring is arranged on the inner side of the upper shell, the PCB is fixed to the bottom of the installation convex ring, a detection piece is arranged on the bottom face of the PCB, the detection piece and the bottom face of the PCB are arranged in a spaced mode, a filling layer is arranged on the bottom face of the PCB, the filling layer is laid on the bottom face of the PCB, and the detection piece is arranged on the bottom face of the PCB. The upper shell extends to the inner side surface of the upper shell; the horizontal height of the bottom face of the filling layer is larger than that of a detection opening of the detection piece, optical gratings which are distributed in a circumferential mode and arranged at intervals are arranged in the rotary knob mechanism, the tops of the optical gratings extend upwards to the side portion of the detection opening, the filling layer is arranged on the bottom face of the PCB, and the filling layer extends towards the side portion to the inner side face of the upper shell. The water in the water storage container is blocked to the maximum extent, and the water vapor is prevented from rising to influence the work of the PCB.

Description

Technical Field

[0001] This utility model relates to the field of knobs, specifically to a waterproof knob. Background Technology

[0002] A knob is a classic mechanical or electronic control device that adjusts parameters through rotation. Its core function is to convert the rotation angle into a physical signal (such as resistance value or potential change) or a digital command, thereby controlling continuously changing parameters such as volume, frequency, and temperature. Its working principle and structure can be divided into two categories based on the application scenario: mechanical and electronic. Mechanical knobs rely on internal resistors (such as potentiometers) to achieve their function. When a mechanical knob is rotated, the contacts slide on the resistance bar, changing the resistance value and outputting an analog signal. Electronic knobs, on the other hand, convert the rotational action into a digital signal through an encoder or sensor. During rotation, the encoder outputs a pulse sequence, which is interpreted into specific values ​​by a microcontroller, achieving high-precision control.

[0003] For example, a utility model patent with application number CN202121723081.X entitled "A Waterproof Knob" includes a connecting base and an operating knob. The operating knob is rotatably mounted on the connecting base, and a retaining edge is formed on the connecting base corresponding to the circumferential position of the operating knob. A receiving gap is formed between the retaining edge and the knob, and a retaining ring is tensioned and installed in the receiving gap. This design effectively blocks external moisture, providing a waterproof effect. However, when installed on a bottle or water storage container, moisture can easily enter the knob from the bottom, affecting the operation of the internal circuitry. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof knob, which aims to improve the problem that when existing knobs are installed on bottles or water storage containers, moisture can easily enter the inside of the knob from the bottom, affecting the operation of the internal circuit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A waterproof knob includes a knob mechanism, a PCB board, and an upper shell;

[0007] The upper shell is set inside the knob mechanism. The inner side of the upper shell is provided with a mounting protrusion ring. The PCB board is fixed to the bottom of the mounting protrusion ring. A detection element is provided on the bottom surface of the PCB board. The detection element is spaced apart from the bottom surface of the PCB board. A filling layer is provided on the bottom surface of the PCB board. The filling layer covers the bottom surface of the PCB board and extends to the inner side of the upper shell.

[0008] The bottom surface of the filling layer is at a height higher than the detection port of the detector. The knob mechanism is provided with gratings that are distributed in a circle and spaced apart. The top of the gratings extends upward to the side of the detection port.

[0009] Further, the bottom surface of the mounting convex ring is provided with a containing groove, the peripheral side of the PCB board is spaced from the inner side surface of the upper shell, the filling layer comprises an upper filling part and a lower filling part,

[0010] The upper filling part is located in the containing groove, and the bottom surface of the upper filling part is flush with the top surface of the PCB board.

[0011] The lower filling part is located on the bottom surface of the PCB board and extends upward between the PCB board and the upper shell and is connected with the upper filling part.

[0012] Further, the bottom surface of the upper shell is flush with the bottom surface of the filling layer.

[0013] Further, the knob mechanism comprises a knob assembly, a shell, a transmission shell and a mounting base.

[0014] The top of the knob assembly is connected with the PCB board, the bottom of the transmission shell is provided with a connecting ring, the inner ring surface of the connecting ring is rotationally connected with the peripheral side of the knob assembly, and the grating is arranged on the top surface of the connecting ring; and the upper shell is arranged on the inner side of the top of the transmission shell.

[0015] The shell is clamped on the peripheral side of the transmission shell, and the bottom of the knob assembly is fixedly connected with the mounting base through the transmission shell.

[0016] Further, the bottom surface of the connecting ring is provided with a guide convex ring, and the mounting base is provided with a guide ring groove, and the guide convex ring is embedded in the guide ring groove.

[0017] Further, the PCB board is provided with a positioning hole, the top of the knob assembly is provided with a positioning protrusion, and the positioning protrusion is embedded in the positioning hole.

[0018] Further, the knob assembly comprises a lower shell, a mounting limiting block and a movable ring,

[0019] The top surface of the lower shell is connected with the PCB board, the middle part of the lower shell is provided with a mounting channel, the mounting channel is provided with a limiting through groove, the mounting limiting block is embedded in the mounting channel, the peripheral side of the mounting limiting block is provided with an outwardly protruding limiting protrusion, the limiting protrusion is embedded in the limiting through groove, and the mounting limiting block is fixedly connected with the mounting base.

[0020] The movable ring is movably sleeved on the peripheral side of the lower shell, the movable ring is provided with a clamping groove, the inner ring surface of the connecting ring is provided with a clamping block, and the clamping block is embedded in the clamping groove.

[0021] Further, the connecting ring is provided with a weight-reducing groove.

[0022] Further, a mounting pipe is arranged in the middle of the bottom surface of the mounting base, the mounting pipe is arranged on the external component and detachably connected with the external connecting piece, a sealing piece is arranged on the bottom surface of the mounting base, the sealing piece is arranged around the circumferential side of the mounting pipe and abuts against the external component.

[0023] Further, the knob mechanism comprises a display screen, the display screen is fixed on the top of the inner ring surface of the shell and abuts against the top surface of the upper shell, the display screen is electrically connected with the PCB.

[0024] Compared with the background art, the present application has the following advantages:

[0025] The bottom surface of the filling layer is higher than the detection port of the detection member, so that the detection port can detect the grating, the knob mechanism drives the grating to rotate to switch different functions, the filling layer is arranged on the bottom surface of the PCB and extends to the inner side surface of the upper shell, so that the water in the water storage container is blocked to the maximum extent, and the water vapor rising does not affect the work of the PCB. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the waterproof knob;

[0027] Figure 2 It is an exploded structural schematic view of the waterproof knob;

[0028] Figure 3 It is a sectional structural schematic view of the waterproof knob;

[0029] Figure 4 It is an enlarged schematic view of the structure of part A of the waterproof knob;

[0030] Figure 5 It is an assembly schematic view of the shell and the transmission shell of the waterproof knob;

[0031] Figure 6 It is an exploded structural schematic view of the shell and the transmission shell of the waterproof knob;

[0032] Figure 7 It is a structural schematic view of the upper shell of the waterproof knob;

[0033] Figure 8 It is a top structural schematic view of the knob assembly of the waterproof knob;

[0034] Figure 9 It is a bottom structural schematic view of the knob assembly of the waterproof knob;

[0035] Figure 10The explosion structure schematic view of the knob assembly of the waterproof knob;

[0036] Figure 11 The partial structure schematic view of the knob assembly of the waterproof knob;

[0037] Figure 12 The elastic sheet structure schematic view of the waterproof knob;

[0038] Figure 13 The bottom structure schematic view of the PCB board of the waterproof knob.

[0039] Mark explanation:

[0040] 1, knob mechanism; 11, knob assembly; 111, lower shell; 1111, installation channel; 1112, limiting through slot; 1113, positioning protrusion; 1114, supporting protrusion; 1115, first eave; 1116, installation groove; 112, installation limiting block; 1121, limiting protrusion; 113, movable ring; 1131, clamping groove; 1132, second eave; 1133, corrugated surface; 12, shell; 121, limiting strip slot; 122, limiting slot; 13, transmission shell; 131, connecting ring; 132, lightening groove; 133, grating; 134, limiting protrusion; 135, limiting protrusion; 136, guide protrusion ring; 137, clamping block; 14, installation base; 141, guide ring groove; 142, installation pipe; 143, sealing element; 15, display screen; 16, elastic sheet; 161, protruding section; 17, limiting ring; 171, first bending section; 172, second bending section;

[0041] 2, PCB board; 21, detection element; 211, signal emitting part; 212, signal receiving part; 22, positioning hole;

[0042] 3, upper shell; 31, installation protruding ring; 311, containing groove;

[0043] 4, filling layer; 41, upper filling part; 42, lower filling part;

[0044] 5, external component. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the utility model more clearly and intelligibly, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0046] In addition, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element of the present application must have a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] When an element is referred to as being "fixed to" or "set to" or "provided on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0049] Embodiment

[0050] Please refer to Figures 1-13 The present embodiment provides a waterproof knob, which comprises a knob mechanism 1, a PCB board 2 and an upper shell 3. The upper shell 3 is arranged in the knob mechanism 1, and the inner side of the upper shell 3 is provided with a mounting convex ring 31. The PCB board 2 is fixed to the bottom of the mounting convex ring 31, and the bottom surface of the PCB board 2 is provided with a detection piece 21. The detection piece 21 is arranged in a spaced manner with the bottom surface of the PCB board 2. The bottom surface of the PCB board 2 is provided with a filling layer 4, which covers the bottom surface of the PCB board 2 and extends to the inner side surface of the upper shell 3. The bottom surface of the filling layer 4 is higher than the detection port of the detection piece 21. The knob mechanism 1 is provided with a plurality of gratings 133 arranged in a circular manner and spaced apart. The top of the grating 133 extends to the side of the detection port. In the present embodiment, the detection piece 21 is an infrared sensor, and the grating 133 converts the rotation action into a digital signal control function switching by blocking the infrared sensor. Figure 13 Specifically, the infrared sensor comprises a signal emitting part 211 and a signal receiving part 212, and the grating 133 moves between the signal emitting part 211 and the signal receiving part 212 to block the light signal emitted by the signal emitting part 211.

[0051] The bottom surface of the filling layer 4 is higher than the detection port of the detection member 21, so that the detection port can detect the grating 133, and the knob mechanism 1 drives the grating 133 to rotate to switch different functions. The filling layer 4 is arranged on the bottom surface of the PCB 2 and extends to the inner side surface of the upper shell 3, so as to block the moisture in the water container as much as possible to avoid the influence of the rising water vapor on the working of the PCB 2. Meanwhile, the connection structure between the PCB 2 and the upper shell 3 is formed to ensure that the PCB 2 has good stability during the use of the knob.

[0052] Please refer to Figure 3 、 Figure 4 and Figure 7 , further, the bottom surface of the mounting convex ring 31 is provided with a containing groove 311, the peripheral side of the PCB 2 is spaced from the inner side surface of the upper shell 3, and the filling layer 4 includes an upper filling part 41 and a lower filling part 42. The upper filling part 41 is located in the containing groove 311, and the bottom surface of the upper filling part 41 is flush with the top surface of the PCB 2. The lower filling part 42 is located on the bottom surface of the PCB 2 and extends upward between the PCB 2 and the upper shell 3 and is connected with the upper filling part 41. The top surface edge of the lower filling part 42 extends to the gap between the PCB 2 and the upper shell 3 to fill the gap, and the containing groove 311 is arranged above the PCB 2, the upper filling part 41 is embedded in the containing groove 311 to seal the top surface edge of the PCB 2, form a wrapped sealing structure, seal the bottom surface and the top surface edge of the PCB 2 at the same time, improve the sealing range, and further improve the waterproof performance of the knob. In the embodiment, the upper filling part 41 and the lower filling part 42 are both filled with gel, and the sealing structure is formed after the gel solidifies to improve the close fit between the filling layer 4 and the PCB 2.

[0053] In the embodiment, the bottom surface of the upper shell 3 is flush with the bottom surface of the filling layer 4, that is, the bottom surface of the lower filling part 42 is flush with the bottom surface of the upper shell 3, so as to maximize the thickness of the lower filling part 42 and improve the tension of the bottom surface of the lower filling part 42 in the filled state through the bottom surface of the upper shell 3 to avoid the overflow of the filled gel during the solidification process and cause adhesion to the internal structure of the knob mechanism 1.

[0054] Please refer to Figures 2-6As shown, specifically, the knob mechanism 1 includes a knob assembly 11, a shell 12, a transmission shell 13 and a mounting base 14; the top of the knob assembly 11 is connected with the PCB board 2. The bottom of the transmission shell 13 is provided with a connecting ring 131, the inner ring surface of the connecting ring 131 is rotationally connected with the circumferential side of the knob assembly 11; a grating 133 is arranged on the top surface of the connecting ring 131. The upper shell 3 is arranged on the top inner side of the transmission shell 13. In this embodiment. The connecting ring 131 is provided with a lightening groove 132, the transmission shell 13 is lightened, and the size of the driving force required by the user when driving the shell 12 to rotate is reduced. Further, in this embodiment, the bottom surface of the PCB board 2 is electrically connected with a lamp bead, and the mounting base 14 is a transparent mounting base 14, and the bottom surface of the shell 12 extends downward to above the mounting base 14, forming a propagation channel between the bottom surface of the shell 12 and the external component 5. The light emitted by the lamp bead propagates outward through the lightening groove 132 and the mounting base 14, forming a light ring to indicate the position of the knob.

[0055] The shell 12 is clamped on the circumferential side of the transmission shell 13, and the bottom of the knob assembly 11 is fixedly connected with the mounting base 14 through the transmission shell 13. The shell 12 and the transmission shell 13 form a knob internal space, which protects the internal knob assembly 11, the PCB board 2 and the upper shell 3. The knob assembly 11 extends downward from the inside, is fixedly connected with the mounting base 14 through the transmission shell 13, limits the transmission shell 13, and ensures the stability of the transmission shell 13 during use; the mounting base 14 is fixedly connected with the external component 5, realizing the installation of the knob. The grating 133 is arranged on the top surface of the connecting ring 131, the shell 12 drives the transmission shell 13 to rotate, thereby driving the grating 133 to pass through the detection port of the detection piece 21 in turn, realizing the switching of the function. In this embodiment, the inner side surface of the shell 12 is provided with a limiting strip-shaped groove 121 and a limiting groove 122, and the outer side surface of the transmission shell 13 is fixedly provided with a limiting protruding strip 134 and a limiting protruding block 135, the limiting protruding strip 134 and the limiting protruding block 135 are respectively embedded in the limiting strip-shaped groove 121 and the limiting groove 122, realizing the detachable connection between the shell 12 and the transmission shell 13.

[0056] Further, the bottom surface of the connecting ring 131 is provided with a guide protruding ring 136, and the mounting base 14 is provided with a guide ring groove 141, and the guide protruding ring 136 is embedded in the guide ring groove 141. The bottom surfaces of the connecting ring 131 and the transmission shell 13 are matched with the top surface of the mounting base 14, the guide protruding ring 136 is limited and guided by the guide ring groove 141, ensuring the accuracy of the rotation direction of the shell 12 and the transmission shell 13.

[0057] Specifically, the knob assembly 11 comprises a lower shell 111, a mounting limiting block 112 and a movable ring 113, and the top surface of the lower shell 111 is connected with the PCB board 2. The middle part of the lower shell 111 is provided with a mounting channel 1111, and the mounting channel 1111 is provided with a limiting through groove 1112. The mounting limiting block 112 is embedded in the mounting channel 1111, and the peripheral side of the mounting limiting block 112 is provided with a limiting protrusion 1121 protruding outward, the limiting protrusion 1121 is embedded in the limiting through groove 1112, and the mounting limiting block 112 is fixedly connected with the mounting base 14. The mounting limiting block 112 is located in the mounting channel 1111 and connected with the mounting base 14, and the mounting limiting block 112 and the limiting through groove 1112 are matched with each other to limit the lower shell 111, so that the lower shell 111 is prevented from rotating with the shell 12 and the transmission shell 13, the lower shell 111 provides stable support force for the PCB board 2, and the stability of the PCB board 2 in the knob is further ensured.

[0058] The movable ring 113 movably sleeves the peripheral side of the lower shell 111, the movable ring 113 is provided with a clamping groove 1131, the inner ring surface of the connecting ring 131 is provided with a clamping block 137, and the clamping block 137 is embedded in the clamping groove 1131. The movable ring 113 sleeves the peripheral side of the lower shell 111, the lower shell 111 provides a limiting force for the movable ring 113, so that the movable ring 113 rotates around the central axis of the movable ring 113, and the central axes of the shell 12, the transmission shell 13, the lower shell 111, the movable ring 113 and the connecting ring 131 coincide with each other. The connecting ring 131 and the movable ring 113 are connected through the clamping block 137 and the clamping groove 1131, so that the movable ring 113 limits the rotation of the shell 12 and the transmission shell 13, the shell 12 and the transmission shell 13 can rotate around the central axes thereof, and the accuracy of the rotation path of the shell 12 and the transmission shell 13 is further improved.

[0059] Specifically, the PCB board 2 is provided with a positioning hole 22, the top of the knob assembly 11 is provided with a positioning protrusion 1113 and a supporting protrusion 1114, and the positioning protrusion 1113 is embedded in the positioning hole 22. In the embodiment, the positioning protrusion 1113 and the supporting protrusion 1114 are arranged on the top surface of the lower shell 111, the positioning protrusion 1113 is embedded in the positioning hole 22, the positioning of the PCB board 2 is realized, the accuracy of the installation position of the PCB board 2 is ensured, the supporting protrusion 1114 abuts against the bottom surface of the PCB board 2, the PCB board 2 is supported from below, and the stability of the PCB board 2 during use is further improved.

[0060] Please refer to Figures 9-12As shown, in this embodiment, the side top of the lower shell 111 is provided with a first eave 1115 extending outward, the positioning protrusion 1113 and the supporting protrusion 1114 are both arranged on the top surface of the first eave 1115, the size of the top of the lower shell 111 is increased through the first eave 1115, thereby improving the supporting and limiting range of the positioning protrusion 1113 and the supporting protrusion 1114, and the stability of the waterproof knob internal components is improved. Further, the bottom surface of the first eave 1115 is provided with a mounting groove 1116 recessed inward. The side top of the movable ring 113 is provided with a second eave 1132 protruding outward, and the second eave 1132 is embedded in the mounting groove 1116.

[0061] Further, the knob assembly 11 further comprises a spring sheet 16 and a limiting ring 17, the top surface of the spring sheet 16 is provided with a protruding section 161 protruding upward, the bottom surface of the second eave 1132 is provided with a corrugated surface 1133, the spring sheet 16 is located below the second eave 1132, and the top of the protruding section 161 and the bottom of the corrugated surface 1133 are in abutting contact. When the movable ring 113 rotates with the shell 12 and the transmission shell 13, the protrusions on the corrugated surface 1133 abut the protruding section 161 almost at intervals, generating a rotating sense and enhancing the rotating feeling. The limiting ring 17 is located at the slot of the mounting groove 1116, closing the slot of the mounting groove 1116, the spring sheet 16 and the second eave 1132 are located between the limiting ring 17 and the groove bottom of the mounting groove 1116, limiting the spring sheet 16, and ensuring that the spring sheet 16 can stably contact the corrugated surface 1133. The spring sheet 16 is provided with a first bending section 171 and a second bending section 172, the first bending section 171 extends upward around the first eave 1115 and abuts the top surface of the first eave 1115, forming a first limiting structure. The second bending section 172 extends upward around the first eave 1115 and passes through the PCB board 2, abutting the top surface of the PCB board 2, forming a second limiting structure. By abutting multiple structures, multiple limiting is achieved, and the limiting effect of the limiting ring 17 on the spring sheet 16 is improved.

[0062] Further, the knob mechanism 1 comprises a display screen 15, the display screen 15 is fixed on the top of the inner ring surface of the shell 12 and abuts the top surface of the upper shell 3, and the display screen 15 is electrically connected with the PCB board 2. The display screen 15 directly displays the knob function and abuts the top surface of the upper shell 3, providing a downward limiting force on the upper shell 3 above the upper shell 3, thereby providing a downward limiting force on the PCB board 2, and the display screen 15 cooperates with the lower shell 111 to provide a limiting force in the vertical direction on the PCB board 2 and the upper shell 3, and the transmission shell 13 provides an axial limiting force on the PCB board 2 and the upper shell 3, thereby limiting the PCB board 2 and the upper shell 3 in multiple directions, ensuring the stability of the PCB board 2 in the knob.

[0063] Specifically, the middle part of the bottom surface of the mounting base 14 is provided with a mounting pipe 142, which is arranged on the outer part 5 and detachably connected with an external connecting part (not shown in the figure). In this embodiment, the outer side surface of the mounting pipe 142 is provided with external threads, and the external connecting part is a nut which is threadedly connected with the mounting pipe 142 inside the outer part 5 to realize the mounting of the knob. The bottom surface of the mounting base 14 is provided with a sealing member 143 which is annularly arranged on the circumferential side of the mounting pipe 142 and abuts against the outer part 5. In this embodiment, the sealing member 143 is a sealing ring which seals the gap between the mounting pipe 142 and the outer part 5 to avoid the water stored in the outer part 5 from overflowing from the connecting position between them to affect the sealing performance of the outer part 5.

[0064] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A waterproof knob, characterized by, The knob mechanism, the PCB board and the upper shell are included; The upper shell is arranged in the knob mechanism, the inner side of the upper shell is provided with a mounting convex ring, the PCB board is fixed at the bottom of the mounting convex ring, the bottom surface of the PCB board is provided with a detection member, the detection member is arranged in the bottom surface of the PCB board, the bottom surface of the PCB board is provided with a filling layer, the filling layer covers the bottom surface of the PCB board and extends to the inner side surface of the upper shell; The bottom surface of the filling layer is higher than the detection port of the detection member, the knob mechanism is provided with gratings which are circumferentially distributed and spaced apart, and the top of the grating extends to the side of the detection port.

2. The waterproof knob according to claim 1, wherein: The bottom surface of the mounting convex ring is provided with a containing groove, the circumferential side of the PCB board is spaced apart from the inner side surface of the upper shell, and the filling layer includes an upper filling part and a lower filling part, The upper filling part is located in the containing groove, and the bottom surface of the upper filling part is flush with the top surface of the PCB board; The lower filling part is located on the bottom surface of the PCB board and extends upward between the PCB board and the upper shell, and is connected with the upper filling part.

3. The waterproof knob according to claim 1, wherein: The bottom surface of the upper shell is flush with the bottom surface of the filling layer.

4. The waterproof knob of claim 1, wherein: The knob mechanism includes a knob assembly, a shell, a transmission shell and a mounting base; The top of the knob assembly is connected with the PCB board, the bottom of the transmission shell is provided with a connecting ring, the inner ring surface of the connecting ring is rotationally connected with the circumferential side of the knob assembly, and the grating is arranged on the top surface of the connecting ring; the upper shell is arranged in the top inner side of the transmission shell; The shell is clamped on the circumferential side of the transmission shell, and the bottom of the knob assembly is fixedly connected with the mounting base through the transmission shell.

5. The waterproof knob according to claim 4, wherein: The bottom surface of the connecting ring is provided with a guide convex ring, and the mounting base is provided with a guide ring groove, and the guide convex ring is embedded in the guide ring groove.

6. The waterproof knob according to claim 4, wherein: The PCB board is provided with a positioning hole, the top of the knob assembly is provided with a positioning protrusion, and the positioning protrusion is embedded in the positioning hole.

7. The waterproof knob according to claim 4, wherein: The knob assembly includes a lower shell, a mounting limiting block and a movable ring, The top surface of the lower shell is connected with the PCB board, the middle part of the lower shell is provided with a mounting channel, the mounting channel is provided with a limiting through groove, the mounting limiting block is embedded in the mounting channel, the circumferential side of the mounting limiting block is provided with a limiting protrusion which protrudes outward, the limiting protrusion is embedded in the limiting through groove, and the mounting limiting block is fixedly connected with the mounting base; The movable ring is movably sleeved on the circumferential side of the lower shell, the movable ring is provided with a clamping groove, the inner ring surface of the connecting ring is provided with a clamping block, and the clamping block is embedded in the clamping groove.

8. The waterproof knob according to claim 4, wherein: The connecting ring is provided with a weight-reducing groove.

9. The waterproof knob according to claim 4, wherein: The middle part of the bottom surface of the mounting base is provided with a mounting pipe, the mounting pipe is arranged in an external component and detachably connected with an external connecting piece, the bottom surface of the mounting base is provided with a sealing member, and the sealing member is annularly arranged on the circumferential side of the mounting pipe and abuts against the external component.

10. The waterproof knob according to claim 4, wherein: The knob mechanism includes a display screen, the display screen is fixed on the inner ring surface of the shell and abuts against the top surface of the upper shell, and the display screen is electrically connected with the PCB board.

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