80results about How to "Simple internal structure" patented technology

The utility model discloses an oil-gas separation mechanism and an engine, the oil-gas separation mechanism comprises an air inlet cam shaft, a chain wheel, a centrifugal separation disc and a breather pipe, and the air inlet cam shaft is provided with a first channel penetrating through the two ends of the air inlet cam shaft; the chain wheel is meshed with a timing chain of an engine and used for driving the air inlet cam shaft to rotate. The centrifugal separation disc is connected with one end of the air inlet cam shaft and provided with a separation cavity, the separation cavity communicates with the first channel, fan blades are arranged in the separation cavity, the centrifugal separation disc rotates to suck mixed oil gas into the separation cavity, and the fan blades guide gas into the first channel and throw engine oil out of the separation cavity. The breather pipe communicates with the end, away from the centrifugal separation disc, of the first channel and is used for exhausting gas in the first channel. According to the oil-gas separation mechanism, the oil-gas separation structure can be arranged on the air inlet cam shaft, the space occupied by the oil-gas separation structure in an engine is reduced, the internal structure of the engine is simplified, and the manufacturing difficulty and manufacturing cost of the engine are reduced.

The utility model discloses a vibration atomizer with an adjustable air passage, which comprises a shell, a battery support fixedly connected in the shell, a control assembly arranged on the battery support and a vibration motor connected with the control assembly, an air adjusting mounting cavity communicated with the air inlet channel is formed in one side of the battery bracket; the air adjusting assembly is connected to the air adjusting mounting cavity in a clamped mode, a first air inlet hole matched with the air inlet channel in position is formed in one side of the shell, and the air adjusting assembly comprises an air adjusting piece and an air adjusting fixing piece; a first air channel is arranged on the air adjusting fixing piece and communicated with the first air inlet hole and the air inlet channel. The cigarette cartridge is detachably connected with the battery support, and the cigarette cartridge is provided with an atomizing core assembly. According to the air inlet structure, the air inlet amount can be adjusted through the air adjusting assembly, meanwhile, small-air-amount operation can be conducted when the air adjusting assembly is closed, the air inlet structure is optimized, and cost is reduced.

The invention relates to the technical field of control, in particular to a motor controller control method, device and equipment and a motor controller, and the method is applied to the motor controller of which each phase comprises at least two power switch devices connected in parallel. Acquiring the real-time temperature of the shell of each power switch device corresponding to the phase; compensating the real-time temperature based on a pre-calibrated initial offset value to obtain a temperature compensation value of the power switch device on the phase; determining a highest temperature compensation value and a lowest temperature compensation value corresponding to the phase, and calculating a temperature difference absolute value between the highest temperature compensation value and the lowest temperature compensation value; and controlling the working mode of the motor controller based on the temperature difference absolute value and the highest temperature compensation value of all phases in the motor controller. Whether each power switch device is in the non-current-sharing state or not is judged through the real-time shell temperature, hardware cost does not need to be newly increased, and the internal structure of the motor controller is simplified.

This utility model relates to a crack-resistant, high thermal conductivity ceramic tile. It solves the problems of poor thermal conductivity and easy cracking and hollowing in existing ceramic tiles. It includes a ceramic tile body, with a wear-resistant and crack-resistant structural layer on the upper surface, an adhesive bonding assembly at the lower end, and a pressure-resistant mechanism in the middle layer of the ceramic tile body for connecting the wear-resistant and crack-resistant structural layer and the adhesive bonding assembly. An adhesive supply structure is provided between the pressure-resistant mechanism and the adhesive bonding assembly. The advantages of this utility model are: good thermal conductivity, less prone to cracking and hollowing, and a stable structure.

The application discloses an automatic fishing float which is convenient to assemble. The automatic fishing float comprises a shell composed of a left shell and a right shell which are fixedly connected, the left shell and the right shell are closed to form a cavity, an air extraction mechanism is arranged in the cavity, the air extraction mechanism comprises a shell which is fixedly connected in the cavity and the outer circumferential surface of the shell is tightly combined with the inner wall of the shell, the shell divides the cavity into a first containing cavity and a second containing cavity along the up-down direction, the air extraction mechanism is used for sucking the air in the external environment into the first containing cavity, a liquid discharge structure for discharging the liquid in the first containing cavity is arranged on the side wall of the first containing cavity, an air extraction channel is arranged on the shell, and the first containing cavity is connected with the external environment through the air extraction channel. On the basis that the driving requirement can be met by using a small battery, the production difficulty of the shell is reduced, the assembly difficulty of the shell is reduced, and the purposes of reducing the production cost and improving the production efficiency are achieved.

A water-reducing agent for coal-based solid waste concrete and its preparation method are disclosed. The water-reducing agent comprises 40-60 parts of a polycarboxylate-based main agent, 15-25 parts of a slump retainer, 10-20 parts of a crack-resistant reinforcing agent, 5-10 parts of a dispersing agent, 2-5 parts of a stabilizer, and 10-20 parts of deionized water. The slump retainer is a modified polyetheramine prepared by block copolymerization of ethylenediamine with ethylene oxide and propylene oxide; the crack-resistant reinforcing agent is a composite of nano-calcium carbonate and modified lignin sulfonate. This invention reduces the adsorption loss of the water-reducing agent by coal-based solid waste particles through the synergistic effect of the polycarboxylate-based main agent and the modified polyetheramine slump retainer, achieving a slump loss rate of ≤15% after 2 hours. The nano-calcium carbonate fills interfacial voids, and the modified lignin sulfonate alleviates hydration thermal stress, resulting in a lower 28-day drying shrinkage rate and higher crack resistance of the concrete. This invention solves the problems of poor adaptability, short slump retention time, and insufficient crack resistance of traditional water-reducing agents in high-volume coal-based solid waste concrete.

The utility model provides an infusion device which comprises a shell, an infusion tube, an infusion tube and an infusion tube. The medicine storage bag is arranged in the accommodating cavity; the remaining needle assembly is mounted in the mounting opening; the infusion pump is arranged in the containing cavity, the input end of the infusion pump is communicated with the medicine storage bag through a medicine inlet pipeline, and the output end of the infusion pump is communicated with the remaining needle assembly through a medicine outlet pipeline. According to the scheme, a piston component is omitted, the internal structure of the infusion device is fully simplified, the size and weight of the infusion device are smaller, and the use experience of the infusion device is effectively improved.

The invention discloses a connection device, and relates to the technical field of electric energy meter detection, the connection device comprises a three-phase probe plate, a single-phase probe plate, a meter connection seat and a driving assembly, the connection device has a three-phase inductive connection state, a three-phase direct connection state and a single-phase connection state, when the distance is switched to the first distance, the first detection column contracts, and the three-phase probe plate extends out; in the three-phase direct connection state, the spacing is switched to the second spacing, the second detection column contracts, and the three-phase probe plate extends out; and in the single-phase connection state, the spacing is switched to the third spacing, the second detection column and the third detection column are contracted, and the single-phase probe plate extends out. According to the technical scheme, the internal structure of the connection device is simplified, and miniaturization of the connection device is facilitated.

The utility model belongs to loudspeaker technical field discloses a kind of electrostatic loudspeaker and electronic equipment, electrostatic loudspeaker includes shell, first polarity structure, second polarity structure, vibration structure. First polarity structure is equipped with at least one, first polarity structure is set in shell;Second polarity structure is equipped with at least one, second polarity structure is set in shell, and second polarity structure and first polarity structure are along first direction vibration structure alternately arranged;When one of the two of first polarity structure and second polarity structure includes electrode layer, the other of the two includes electret layer;First direction vibration structure is the thickness direction of shell;Vibration structure is set in shell, and vibration structure is conductor;The inner periphery of vibration structure is connected to second polarity structure, and the outer periphery of vibration structure is connected to shell. The electrostatic loudspeaker and electronic equipment provided by the utility model have long service life.

The utility model relates to the technical field of raw material screening devices, and discloses a raw material screening device for cracking construction of a basement structure in a riverside area, which comprises a device main body and a screen plate, the screen plate is arranged in the device main body, and a screen mesh is arranged at the center position in the screen plate. Discharging inclined planes are arranged on the surfaces of the portions, on the two sides of the screen net, of the screen plate correspondingly, side material baffles are fixed to the two sides of the screen plate correspondingly, cases are fixed to the portions, below the screen plate, of the two inner walls of the device body correspondingly, fourth rotating driving parts are installed in the cases, and cams are installed at the output ends of the fourth rotating driving parts; the cam is matched with the sieve plate. According to the raw material screening device for cracking construction of the basement structure in the riverside area, the internal structure of the device is optimized, the automatic screening and material receiving functions are achieved, manual material taking is not needed, raw materials can be prevented from falling off from the two sides of the screening plate, and screening is more comprehensive.

This invention relates to the field of motor technology and discloses a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs). The motor includes a stator with a winding section and a frequency conversion section. The winding section is arranged in a ring array around the center of the stator, allowing for different coil combinations on a single winding. The winding section includes slots A, B, and C. Slot A is located on the inner wall of the stator, while slots B and C are located on the stator itself. The inner wall of the stator also has inlet holes A, B, and C. Inlet holes A and B communicate with slot A, and inlet holes B and B communicate with slot B. The motor employs a wide-range speed control to adapt to UAV operating conditions, featuring a six-speed adjustment function. The rated speed ranges from 8 r / min (8 Hz) to 48 r / min (48 Hz), and the speed ratio can reach 1:8 during weak field operation. This allows for precise matching of the power requirements of different stages of UAV operation, such as takeoff, cruise, and high-speed flight, achieving full operating condition coverage without motor replacement.

The utility model discloses an electronic cigarette preventing condensate from blocking air pipe, which comprises a host computer, a suction nozzle, a microphone, an oil tank, a heating wire, a tobacco tank, an air passage and a stop block. The suction nozzle is installed on the top of the host computer. The microphone is used for sensing the user's inhalation action to start the electronic cigarette. The oil tank is used for storing tobacco tar. The heating wire is connected with the bottom of the oil tank and used for heating the tobacco tar in the oil storage cavity. The first end of the tobacco tank is communicated with the suction nozzle, and the second end of the tobacco tank extends to the bottom of the heating wire. The first end of the air passage is communicated with the outside of the electronic cigarette, and the second end of the air passage is communicated with the second end of the tobacco tank. The stop block is filled in the air passage, and the stop block is provided with air holes for the gas in the air passage to flow into the tobacco tank. The air holes are arranged away from the bottom of the tobacco tank. The utility model solves the problem that the existing electronic cigarette condensate easily blocks the air pipe and affects the normal use of the user.

This invention discloses an electromagnet with redundant design, its usage method, and a circuit breaker. The electromagnet with redundant design includes a housing. A first moving iron core and a second moving iron core are movably disposed within the housing along its length. The first moving iron core has a through hole extending along the length of the housing. The second moving iron core is connected to an actuating shaft that moves synchronously with the first moving iron core and extends through the through hole to the outside of the first moving iron core and a first end plate. The housing contains a first coil assembly, a first stationary iron core, a second coil assembly, and a second stationary iron core. The first and second coil assemblies can be simultaneously energized to drive the first and second moving iron cores to move simultaneously. This invention fully realizes redundant design within a limited width space. The first and second moving iron cores can operate simultaneously or separately. When operating separately, safe redundancy is achieved; when operating simultaneously, a greater output force is provided, thus meeting the need for a greater tripping force.

There is provided a light source device according to one embodiment of the present disclosure for outputting an extreme ultraviolet light source based on an electron beam, comprising: a chamber; an electron beam emission unit including a cathode electrode and a plurality of emitters, each of which contains a carbon-based material and which are arranged over the cathode electrode in such a manner as to be spaced apart from each other, the electron beam emission unit generating an electron beam within the chamber; and an anode electrode positioned within the chamber, but in a manner that is spaced apart from the electron beam emission unit, and ionized upon incidence of the electron beam thereon, thereby generating plasma, wherein extreme ultraviolet is generated from the plasma.

The utility model particularly relates to an integrated power supply structure of a double-movement electronic watch, which comprises an inner watch body, the inner watch body is arranged in a shell, a quartz movement and a circuit board are arranged in the inner watch body, the quartz movement is arranged below the circuit board, the output end of the quartz movement penetrates through the circuit board to drive a pointer to rotate, and the output end of the quartz movement is connected with the circuit board. An electrode spring penetrates through the lower portion of the inner watch body and abuts against the negative electrode of a button cell, and the button cell supplies power to the quartz movement and the circuit board. The circuit board is sleeved on the quartz movement, and the button cell supplies power to the quartz movement and the circuit board at the same time, so that the internal structure is simplified, the occupied volume of the power supply structure is reduced, and the whole electronic watch is lighter and more comfortable to wear.

This application discloses a joint motor control method, electronic device, and storage medium. By placing a position sensor only in the reducer, the internal structure of the joint is simplified, reducing the space requirement for position sensor installation, thereby reducing assembly difficulty and hardware cost. In cases where reducing the number of position sensors leads to less position detection data and the position sensor detection results lag behind the motion state of the drive motor, joint motion parameters are acquired, including the position parameters collected by the position sensors. Based on the joint motion parameters, a motor rotor angle is generated using a preset virtual axis model. The drive motor rotation is controlled according to the motor rotor angle, which is directly related to the actual position of the load end, ensuring high-precision control of the joint motor.

The application provides a hot airflow assisted slit bubble electrostatic spinning device. The slit bubble electrostatic spinning device comprises a hot airflow channel, a slit metal solution channel, a bubble tube and an electrostatic generator; the hot airflow channel and the slit metal solution channel are both circular truncated cone pipelines formed by gradually narrowing inner and outer tubes; the inner tube diameter of the hot airflow channel is the same as the outer tube diameter of the slit metal solution channel; the slit metal solution channel penetrates through and is fixedly attached to the inner tube of the hot airflow channel, the bubble tube extends and is fixed at the inner tube of the slit metal solution channel, and the electrostatic generator is connected to the slit metal solution conduit through a wire. The application improves the arrangement of polymer molecular chains in the solution through the slit metal solution channel, and provides high-speed hot airflow around the bubble through the circular truncated cone hot airflow channel to lift the bubble upward and help the polymer molecular chains to be uniformly distributed parallel to the bubble surface, thereby improving the internal structure of the nanofiber and preparing reinforced nanofiber.

The application provides a multi-mode 12-bit successive approximation analog-to-digital converter, relates to the technical field of integrated circuits, and comprises a first capacitor array, a second capacitor array, a comparator, a successive approximation register, a logic control circuit, and a mode control unit; the top plate of the first capacitor array is connected to the positive input end of the comparator; the top plate of the second capacitor array is connected to the negative input end of the comparator; the bottom plate of the first capacitor array and the bottom plate of the second capacitor array are both connected to at least one of an analog input end, a common-mode voltage node, a high-level reference end, and a low-level reference end; and the output end of the comparator is connected with a first switch network and a second switch network through the successive approximation register and the mode control unit. The application uniformly realizes multiple input modes on a single ADC kernel, simplifies the system structure, reduces the system cost and error sources, improves the adaptability, and is consistent in transmission characteristics under multiple modes and relatively simple in structure.

The utility model discloses a massage sofa bed with lying linkage mechanism, including base, sliding frame, the sliding frame respectively includes support frame, seat frame, backrest frame, leg support frame, support frame and base sliding connection, seat frame fixed mounting is in support frame, and leg support frame and backrest frame are respectively rotationally connected in the front and rear end of seat frame, be provided with connecting rod subassembly between leg support frame, backrest frame and base, connecting rod subassembly includes two first connecting rod, two second connecting rod, be provided with drive mechanism between seat frame and base, when the sliding frame relatively base slides to front, backward, can pass through second connecting rod linkage backrest frame corresponding backward, forward overturn, when backrest frame backward, forward overturn, can pass through first connecting rod linkage leg support frame upward, downward overturn. The utility model can realize the synchronous linkage of sliding frame forward movement, backrest overturn and leg support lifting through single drive mechanism.

The utility model discloses a bidirectional transmission LED support, which relates to the technical field of LED supports and comprises a circuit layer and a covering layer which are positioned and laminated. Metal bonding pads are distributed on the two faces of the circuit layer, metalized through holes are formed in the circuit layer, and the metal bonding pads on the two faces can be connected through the metalized through holes, so that use of copper foil of a PCB in electronic assembly is reduced, the material cost is reduced, the manufacturing process of the support is simplified, the machining difficulty is reduced, and the production efficiency is improved. Therefore, the overall manufacturing cost is effectively controlled, the function of data transmission at any end in the transmission direction of the display screen is achieved, breakpoint continuous transmission is supported, and the flexibility and reliability of data transmission are improved.

The utility model provides a novel converter, mobile plug movable is arranged on the inner wall of converter body, mobile plug one side is connected with conductive component, and conductive component includes integrative conductive mounting seat and the conductive sheet of setting on conductive mounting seat, and conductive mounting seat has the mobile part of being connected with mobile plug and is used for installing the installation part of conductive sheet, the utility model discloses integrative conductive sheet mounting seat and integrates mobile part and installation part in one, has simplified the internal structure of converter, has also enhanced the stability of overall structure significantly, this design effectively avoids the problems such as unstable connection, easy to loosen of traditional converter because of the dispersed installation of parts, thereby improves the electrical connection reliability and service life of converter, simultaneously, the accurate cooperation of mobile plug and conductive sheet mounting seat ensures the stability and high efficiency of current transmission, further optimizes the electrical performance of converter.

The utility model discloses a kind of for product surface cleaning's blowing box, including box, blowing assembly and blowing positioning mechanism, the front side of box is provided with opening;Blowing assembly includes guide rail, drive mechanism, sliding block and blowing frame, guide rail and drive mechanism are respectively horizontally fixed and arranged on the rear wall of box, sliding block is slidably arranged on guide rail, the outside rear end of blowing frame is fixedly connected on sliding block, drive mechanism is used to drive blowing frame horizontal movement;The inside of blowing frame is circumferentially fixed and arranged with multiple blowing heads, and blowing space is formed between multiple blowing heads;Blowing positioning mechanism is used to place product horizontally in the inside rear side of box and make product horizontally pass through blowing space;Its advantage is that product is placed on blowing positioning mechanism, a section of product is in blowing space, drive mechanism drives blowing frame horizontal movement, multiple blowing heads blow entire product surface respectively, without robot clamping.

The utility model belongs to syringe technical field especially relates to syringe is with positive and negative rotation adjusting mechanism, injection pen. One kind is used for syringe positive and negative rotation adjusting mechanism, including: rotary drum gear, rotary drum gear end wall is equipped with ratchet tooth;Dose knob, its rotation setting is in the end of pen body;Push rod rotary drum, it is coaxial with rotary drum gear setting, and is suitable for relative pen body axial movement;Rotary drum upper gear, it is set in dose knob, is set in push rod rotary drum outer wall, and is engaged with rotary drum gear;Among them, dose knob positive rotation, drive rotary drum upper gear relative rotary drum gear positive rotation, to pressurize the coil spring in pen body;Dose knob reverse rotation, rotary drum upper gear is pushed by dose knob and removes the direction of moving away from rotary drum gear, and is engaged with ratchet tooth to make rotary drum upper gear relative rotary drum gear reverse rotation;Through rotary drum gear, rotary drum upper gear and dose knob's cooperation, realized the positive and negative rotation adjustment of rotary drum gear, reduced the volume in pen body.

The invention relates to the field of intelligent casting, discloses a multi-station linkage aluminum alloy precision forging forming automatic production line, and relates to the field of metal forging machining. The production line comprises a hydraulic machine, a mold assembly, a material changing assembly and a conveying assembly. The hydraulic machine provides forging power; the conveying assembly is used for conveying the mold assemblies among the stations; the die assembly compresses internal air through forging downward pressure to store energy, and locking pressure maintaining is achieved through a mechanical buckle. And the reloading assembly positions the mold through a boss structure, mechanically triggers a buckle to unlock, releases stored air pressure to push the mold to automatically reset and eject out, and synchronously conducts an internal air path for cooling at the same time. By means of mechanical linkage, tight connection of pressure maintaining transportation, automatic demolding and cooling procedures of the mold is achieved, the equipment structure is simplified, and the forging efficiency and the forming quality are improved.

The utility model discloses a leakage circuit breaker mounting structure, and the circuit breaker shell is composed of base, middle seat and upper cover, and the middle seat and upper and lower cover cooperate to form L pole and N pole matrix, and the L pole matrix contains arc extinguishing chamber, L pole moving and static contact group and incoming and outgoing line terminal; the N pole matrix contains circuit board, N pole moving and static contact group and incoming and outgoing line terminal, and the middle seat is divided into main seat body and corner piece, the corner piece is corner structure, one end of the inserted board is inserted into the matching recess of the corner mouth of main seat body, the other end of the matching surface is abutted with the abutted mesa of main seat body, and the closed corner mouth outer edge is located between the base and the upper cover, and the L pole and N pole matrix are communicated through the corner mouth to form magnetic ring placement area, the magnetic ring is obliquely installed, and the L pole and N pole power supply wire are provided with the magnetic ring. The product solves the problem that the magnetic ring is difficult to install in the limited space due to the large volume.

The utility model relates to a thread parameter detection structure for determining the abrasion loss of an anvil block of a tooth height gauge, which comprises a detection sample piece, a bottom plate, an adsorption type fixing piece and a clamping type fixing assembly, and the adsorption type fixing piece adopts a magnet; the whole detection sample piece is in a semi-arc bent plate shape, and a standard threaded groove is formed in the outer side face of the detection sample piece. The bottom plate is transversely fixed at positions, close to two ends, of the inner side of the detection sample piece; bottom grooves are formed in the two sides of the bottom end of the bottom plate respectively, and magnets are fixed in the bottom grooves. The clamping type fixing assembly is arranged on the rear side of the bottom plate and is detachably and fixedly connected with the bottom plate through a connecting plate extending into the upper end of the bottom plate. The detection structure can be used for detecting the abrasion loss of the equal-pitch groove on the anvil block of the tooth height gauge.

The utility model discloses a ceramic gear pump and a gear pump coating device, the ceramic gear pump comprises a pump body, a driving motor, a driving gear and a driven gear, the driving gear and the driven gear are meshed with each other and arranged in the pump body, the driving motor drives the driving gear to rotate, the driving gear and the driven gear are both ceramic gears, and the driving gear and the driven gear are arranged in the pump body. The pump body is provided with an installation cavity used for arranging the driving gear and the driven gear, a liquid outlet flow channel is reserved between at least one of the driving gear and the driven gear and the peripheral wall of the installation cavity, the pump body is provided with a liquid outlet pipe and a liquid inlet pipe, and the liquid outlet pipe and the liquid inlet pipe are both communicated with the liquid outlet flow channel. The lithium battery coating device has the advantages that the internal structure of the gear pump is simple, and when the gear pump for lithium battery coating feeding is damaged, the lithium battery coating device is relatively easy to overhaul and maintain.

The application discloses a multi-layer anti-large-overload buffer air bag with different strength inside and outside, which is suitable for load buffering application scenarios with different strength impact overload. The multi-layer anti-large-overload buffer air bag with different strength inside and outside mainly comprises an inner air bag, an outer air bag, a chamber diaphragm and a fixing accessory. The inner air bag is integrated and used for providing support force for the load in the buffering process; the outer air bag is attached to the outer region of the inner air bag and used for protecting the inner air bag and the buffer; the diaphragm is located in the inner region of the outer air bag and used for separating different chambers of the outer air bag; and the fixing accessory is connected at the inner side of the cavity of the inner air bag and used for fixing the air bag and the buffer. The multi-layer anti-large-overload buffer air bag with different strength inside and outside has higher impact overload reduction capacity and can adapt to the buffering working condition when the chamber is damaged.

This invention discloses a surface cleaning device, belonging to the technical field of cleaning equipment. It includes a body and a floor brush. The floor brush comprises a brush body with a suction port and a clean water tank for supplying liquid, mounted on the brush body. A cleaning component is detachably installed on the front side of the brush body, and the suction port is located at the rear of the cleaning component. A wastewater tank is provided on the body. The lower end of the body is pivotally connected to the rear of the brush body via a hinge assembly. The front end of the clean water tank extends forward and at least covers the cleaning component. The rear end of the clean water tank extends backward and at least partially bypasses the hinge assembly to connect with the brush body. At least a portion of the bottom wall of the clean water tank extends continuously and smoothly from left to right, penetrating the central axis of the brush. This design eliminates the need for a connecting pipe, allowing complete drainage of the liquid in the clean water tank, increasing its capacity while simplifying its internal structure.

This application relates to the field of smart bathroom technology, and provides a water pattern switching device, a spray gun, a smart toilet seat, and a smart toilet. The housing's receiving groove and one end of the spray head form a water passage cavity. The spray head is provided with independent first and second water supply channels, which are respectively connected to the first and second nozzles. A drive shaft rotatably passing through the housing drives the spray head to rotate to a first position or a second position. When the drive shaft rotates to the first position, the first water inlet end is connected to the water passage cavity, and the second water inlet end moves to the lowest point of the water passage cavity. The movable part moves to the lowest point under the action of gravity to block the second water inlet end, and only the first water supply channel is filled with water, which is sprayed out by the first nozzle with the first water pattern. When the drive shaft rotates to the second position, the second water inlet end is connected to the water passage cavity, and the first water inlet end moves to the lowest point of the water passage cavity. The movable part moves to the lowest point under the action of gravity to block the first water inlet end, and only the second water supply channel is filled with water, which is sprayed out by the second nozzle with the second water pattern.