A rotating water spray gun

Abstract

The present application relates to a rotary water spray gun, which comprises a gun body, a rotating head, a rotating tube, a rotating drive assembly, a first replacement water outlet assembly and a second replacement water outlet assembly, wherein the rotating head is rotatably connected to the gun body, the rotating tube is coaxial with the rotating axis of the rotating head, the rotating tube is connected to the water inlet end of the gun body, a transfer cavity is fixed in the rotating head, the end of the transfer cavity away from the rotating tube has a cavity opening, the part of the rotating tube located inside the transfer cavity is provided with a water outlet, the rotating drive assembly is used to drive the rotating tube to rotate and the rotating head to rotate, the second replacement water outlet assembly and the first replacement water outlet assembly are detachably connected to the rotating head, the second replacement water outlet assembly is used to output a uniform water flow, and the first replacement water outlet assembly is used to output two oscillating water flows. The present application has a variety of application scenarios and uses multi-angle strong water flows to achieve efficient cleaning.

Description

Technical Field

[0001] The present invention relates to the field of spraying devices, and in particular to a rotating water spray gun. Background Art

[0002] Water spray guns are commonly used tools in the fields of garden irrigation, fire extinguishing, and flushing. That is, household water spray guns often have two functions: uniform flushing and strong flushing. That is, they use multiple uniform water streams for simple flushing of a larger area, and use a single strong water stream for strong flushing to wash away dirt, such as washing a car.

[0003] However, when the stubborn dirt on the vehicle surface has strong adhesion, it is difficult to wash it away with the existing strong water flow. Summary of the invention

[0004] In order to improve the flushing effect, the present application provides a rotating water spray gun.

[0005] The present application provides a rotary water spray gun, which adopts the following technical solution:

[0006] A rotating water spray gun comprises a gun body, a rotating head, a rotating tube, a rotating drive assembly, a first water outlet assembly and a second water outlet assembly, wherein the rotating head is rotatably connected to the gun body, the rotating tube is coaxial with the rotating axis of the rotating head, the rotating tube is connected to the water inlet end of the gun body, a transfer cavity is fixed in the rotating head, the end of the transfer cavity away from the rotating tube has a cavity opening, a portion of the rotating tube located inside the transfer cavity is provided with a water outlet, the rotating drive assembly is used to drive the rotating tube and the rotating head to rotate, and the rotation speed of the rotating tube is greater than the rotation speed of the rotating head; the second water outlet assembly and the first water outlet assembly are respectively detachably connected to the rotating head, and the second water outlet assembly is ... The water component is used to output a uniform water flow, and the first replacement water outlet component is used to output two swinging water flows; the first replacement water outlet component includes a circular mounting plate, two nozzles and a swing transmission structure, the mounting plate is detachably mounted in the cavity, the two nozzles are symmetrically and movably mounted on the mounting plate with the axis of the mounting plate as the center, the nozzles are connected to the transfer cavity, the middle part of the mounting plate is rotatably connected with a rotating rod, the rotating rod is coaxially and detachably connected to the rotating tube, the swing transmission structure is used to convert the torque of the rotating rod into a force that drives the nozzle to swing back and forth, the swing plane of the nozzle is parallel to the axis of the rotating tube, and there is an angle between the swing plane of the nozzle and the plane passing through the axis of the rotating tube and the nozzle.

[0007] By adopting the above technical solution, when flushing is required, the first replacement water outlet component is installed on the transfer cavity, the rotating drive component is started, the rotating tube and the rotating head rotate respectively, and the torque of the rotating tube is converted into a force for the reciprocating swing of the nozzle through the swing transmission structure. At the same time, the rotating head drives the nozzle to rotate around the axis of the rotating tube, that is, the two movement modes of the nozzle are superimposed, and the movement trajectory of the nozzle is diversified, so that the strong water flow sprayed by the nozzle varies in angle relative to the flushing surface (such as the car surface), so that the flushing force can be applied to stubborn dirt from different angles to speed up the removal of dirt, and it can also reduce the flushing dead angle of the surface to be flushed, that is, improve the flushing effect and comprehensiveness of flushing.

[0008] Furthermore, the two nozzles and the swing plane positions of the nozzles are respectively set so that the powerful water streams of the nozzles can be sprayed separately without interference, thereby further improving the angle variation diversity and trajectory density of the powerful water streams, and further improving the flushing effect and comprehensiveness of the flushing.

[0009] Optionally, the swing transmission structure includes a connecting arm, a slide rail, a rectangular frame and a connecting rod, wherein the slide rail is fixed to the outer surface of the mounting plate, the slide rail is located in the swing plane of the nozzle, the connecting arm is slidably connected to the slide rail, the rectangular frame is sleeved on the outside of the nozzle, the connecting arm is fixedly connected to the rectangular frame, the two ends of the connecting rod are respectively fixedly connected to the two connecting arms, the connecting rod is perpendicular to the connecting arm, the connecting rod is provided with a strip hole extending along its own length, and a circular eccentric rod is eccentrically fixed to the end face of the rotating rod, and the eccentric rod is slidably connected to the strip hole.

[0010] By adopting the above technical solution, the rotating tube drives the eccentric rod to rotate eccentrically through the rotating rod, and the eccentric force of the eccentric rod is applied to the connecting rod through the cooperation of the strip hole to drive the connecting rod and the connecting arm to move back and forth along the direction of the slide rail. Finally, the reciprocating swinging force of the connecting arm is transmitted to the nozzle through the rectangular frame to drive the nozzle to swing back and forth, and the structure is simple.

[0011] Optionally, a conical tube is integrally formed on the outer surface of the mounting plate, a large end of the conical tube is connected to the inner cavity of the transfer cavity, a rubber tube is fixed to the small end of the conical tube, and the other end of the rubber tube is fixedly connected to the nozzle.

[0012] By adopting the above technical solution, the water in the gun body enters the rotating tube, then enters the transfer cavity through the water outlet, and is ejected through the conical tube, the rubber tube and the nozzle in sequence. The setting of the conical tube can reduce the loss of water pressure to improve the spraying effect, and the setting of the rubber tube is to improve the mobility of the nozzle so that the nozzle can swing easily.

[0013] Optionally, the second replacement water outlet assembly includes a first mounting ring, a first water outlet plate made of rubber and a first sliding sleeve, the first mounting ring is sleeved and fixed on the outer circumferential surface of the first water outlet plate, the first mounting ring is threadedly connected to the inner wall of the cavity, the first water outlet plate is provided with densely distributed first water outlet holes, the first sliding sleeve is rotatably connected to the middle part of the first water outlet plate, the first sliding sleeve is non-rotatably and slidingly connected to the end of the rotating tube, an annular first wave protrusion is fixed to the end of the first sliding sleeve, the first wave protrusion has a crest and a trough, the arc surface of the first wave protrusion faces the cavity, the rotating head is radially slidably penetrated by a first abutment rod, and the outer wall of the first abutment rod abuts against the arc surface of the first wave protrusion.

[0014] By adopting the above technical solution, when the rotating tube rotates, it will drive the first sleeve to rotate. Through the cooperation of the first wave protrusion and the first abutment rod, and the pressure of the water in the transfer cavity on the first water outlet plate, the first sleeve will be driven to reciprocate along the axial direction of the rotating tube. The first sleeve will drive the central part of the first water outlet plate to reciprocate, that is, forcing the central part of the first water outlet plate to intermittently deform to a convex or concave state, thereby changing the injection angle of the first water outlet, that is, the water flow injected by the first water outlet will swing back and forth, and the swinging plane is located in the radial plane of the rotating tube. Combined with the low-speed rotation of the rotating head and the first water outlet plate, the water flow trajectory of the first water outlet is diversified, thereby increasing the complexity of the flushing path, so as to improve the flushing uniformity and reduce the flushing dead angle, thereby improving the flushing effect and water-saving effect.

[0015] Optionally, a first anti-slip sleeve made of POM material is fixed to the central part of the first water outlet plate, a first anti-slip block made of POM material is fixed to one end of the first sliding sleeve, and the first anti-slip block is rotatably connected to the first anti-slip sleeve; a plurality of steel bars are embedded in the first water outlet plate, and the steel bars extend radially along the first water outlet plate.

[0016] By adopting the above technical solution, by setting the cooperation of the first anti-slip sleeve and the first anti-slip block, the axial traction of the rotating tube on the first water outlet plate can be achieved, and the situation where the torque of the rotating tube is directly transmitted to the first water outlet plate is reduced; and by setting the POM material, which has a higher hardness and strong self-lubricating property, the friction can be greatly reduced.

[0017] Finally, by providing steel bars, the rigidity of the first water outlet plate is improved, and the occurrence of severe local deformation of the first water outlet plate due to excessive water pressure is reduced, thereby ensuring the stability of the angle change of the first water outlet hole.

[0018] Optionally, the second replacement water outlet assembly includes a second mounting ring, a second water outlet plate made of rubber, a second sliding sleeve, a connecting rod and a rotating ring, the second mounting ring is fixed to the outer peripheral surface of the second water outlet plate, the second mounting ring is threadedly connected to the inner wall of the cavity, the second water outlet plate is provided with densely distributed second water outlet holes, the second water outlet plate is divided into an annular outer shape deformation part and an annular inner shape deformation part from the outside to the inside, the second water outlet holes of the outer shape deformation part and the second water outlet holes of the inner shape deformation part are circumferentially staggered, and a transmission ring is provided at the boundary line between the outer shape deformation part and the inner shape deformation part; The end of the rotating tube is rotatably connected to the middle part of the second water outlet plate, the second sliding sleeve is non-rotatably and slidingly connected to the rotating tube, the rotating ring is rotatably sleeved on the second sliding sleeve, one end of the connecting rod is fixedly connected to the rotating ring, and the other end of the connecting rod is hingedly connected to the transmission ring; an annular second wave protrusion is fixed at the end of the second sliding sleeve, the second wave protrusion has a crest and a trough, the arc surface of the second wave protrusion faces the cavity, and the rotating head is radially slidably penetrated by a second abutment rod, and the outer wall of the second abutment rod abuts against the arc surface of the second wave protrusion.

[0019] By adopting the above technical scheme, when the rotating tube rotates, the second sleeve will be driven to rotate. Through the cooperation between the second wave protrusion and the first abutment rod, and the pressure of the water in the transfer cavity on the second water outlet plate, the second sleeve will be driven to reciprocate along the axial direction of the rotating tube. The second sleeve will reciprocate through the rotating ring and the connecting rod transmission ring to force the boundary line between the outer shape deformation part and the inner shape deformation part of the second water outlet plate to intermittently deform to an outward convex or inward concave state, thereby changing the injection angle of the second water outlet hole of the outer shape deformation part and the inner shape deformation part, that is, the water flow injected by the outer shape deformation part and the inner shape deformation part and the second water outlet hole is offset towards or away from each other, further increasing the complexity of the flushing path and the flushing density, thereby improving the flushing uniformity and reducing the flushing dead angle, thereby improving the flushing effect and water-saving effect.

[0020] In addition, the end of the rotating tube plays a supporting role for the second water outlet plate to maintain the stability of the central part of the second water outlet plate, thereby ensuring that the outer deformation part and the inner deformation part and the deformation angle remain stable. By setting the rotating ring, the situation where the torque of the rotating tube is directly transmitted to the second water outlet plate is reduced, so that the second water outlet plate only moves with the rotation of the rotating head.

[0021] Optionally, the second water outlet hole is an elliptical hole, and the center part of the second water outlet plate is recessed toward the direction of the rotating tube; a second anti-slip sleeve is integrally formed with a second anti-slip sleeve, and a second anti-slip block made of rubber is rotatably connected in the second anti-slip sleeve, and the second anti-slip block is threadedly connected to the end part of the rotating tube; when the rotating tube rotates, the torque of the rotating tube is transmitted to the second water outlet plate through the friction force between the second anti-slip block and the second anti-slip sleeve and forces the second water outlet plate to rotate and deform, and the aperture of the second water outlet hole becomes smaller; when the friction force between the second anti-slip block and the second anti-slip sleeve is less than the deformation reaction force of the second water outlet plate, the second water outlet plate stops continuing to rotate and deform.

[0022] By adopting the above technical solution, the torque of the rotating tube and the friction between the second anti-slip block and the second anti-slip sleeve are utilized to rotate and deform the second water outlet plate. When the rotational deformation degree of the second water outlet plate is large, the deformation reaction force of the second water outlet plate is large and greater than the friction force, and the rotating tube rotates relative to the second water outlet plate, so that the second water outlet plate rotates only with the rotation of the rotating head.

[0023] Through the rotational deformation of the second water outlet plate, the aperture of the second water outlet hole can be controlled to increase the spray speed of the water flow. In addition, the rigidity of the second water outlet plate can be increased to prevent it from being greatly deformed due to excessive water pressure, thereby ensuring the accuracy of the deformation offset of the outer deformation part and the inner deformation part when the transmission ring moves.

[0024] Optionally, a third replacement water outlet assembly is also included, which includes a water mist nozzle and a quick-connect water pipe, the water mist nozzle is threadedly connected to the end of the rotating tube, and the water outlet is connected to the inner cavity of the water mist nozzle; the tube wall of the rotating head is provided with an annular cavity, the annular cavity is provided with an annular injection port connected to the end face of the rotating head, the outer peripheral surface of the rotating head is provided with a water inlet connected to the annular cavity, and the quick-connect water pipe is detachably connected to the water inlet; the particle size of the droplets sprayed from the injection port is larger than the particle size of the droplets from the water mist nozzle.

[0025] By adopting the above technical solution, firstly, when it is necessary to water the garden plants, the water mist nozzle and the quick-connect water pipe can be replaced, wherein the water mist nozzle sprays out conical small-particle water mist, and the small-particle water mist has a large density, which can effectively capture the dust in the air, and at the same time can also evenly replenish water for the green plants and create a humid environment, thereby increasing the scope of application of the water spray gun.

[0026] Secondly, the annular nozzle will spray out a hollow cone-shaped large-particle water mist, which can capture the escaping small-particle water mist to prevent the excessive dispersion of small-particle water mist, resulting in unclear vision and water waste.

[0027] Optionally, the rotation drive assembly includes a drive motor, a ring gear, three planetary gears, a center gear and a planetary carrier, wherein the drive motor is installed at the rear end of the gun body, the rotating tube is coaxially fixed with the drive motor, the center gear is sleeved and fixed on the rotating tube, the ring gear is fixed to the gun body and is coaxial with the center gear, the planetary gears are respectively meshed with the ring gear and the center gear, the planetary carrier is connected to the planetary gears, and the planetary carrier is relatively fixed to the rotating head.

[0028] By adopting the above technical solution, firstly, the rotating tube itself has a higher rotation speed, thereby being able to drive the nozzle to oscillate at a high frequency to improve the flushing effect; secondly, through the planetary gear structure, the higher rotation speed of the rotating tube is converted into a lower rotation speed of the rotating head through a higher transmission ratio, thereby making the torque of the rotating head larger.

[0029] Secondly, the high-speed rotating tube and the low-speed rotating head can ensure the transmission stability of the swing transmission structure.

[0030] Optionally, the gun body is fixed with a convex ring coaxial with the rotating tube, an end wall is provided at the end of the rotating head away from the cavity opening, a disc spring is provided between the end wall and the convex ring, and the elastic force of the disc spring is used to force the rotating head to move in a direction away from the cavity opening.

[0031] By adopting the above technical solution, the contact areas between the disc spring and the end wall and the convex ring are respectively smaller, which can reduce the rotational friction. Secondly, when the water pressure acts on the mounting plate, the axial force of the mounting plate is transmitted to the disc spring through the rotating head, thereby reducing the impact of the water pressure and playing a buffering role.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. By setting a rotating drive assembly and a swing transmission structure, the torque of the rotating tube is converted into a reciprocating swinging force of the nozzle through the swing transmission structure. At the same time, the rotating head drives the nozzle to rotate around the axis of the rotating tube, so that the two motion modes of the nozzle are superimposed, so that the angle of the strong water flow sprayed by the nozzle relative to the surface to be washed (such as the car surface) varies, and the washing dead angle of the surface to be washed can be reduced, that is, the washing effect and comprehensiveness of the washing are improved;

[0034] 2. By setting the first sliding sleeve and the first water outlet plate, the torque of the rotating tube and the water pressure of the first water outlet plate are converted into a force that drives the first sliding sleeve to move back and forth along the axial direction of the rotating tube, so as to force the central part of the first water outlet plate to intermittently deform to a convex or concave state, thereby changing the spray angle of the first water outlet hole, making the water flow trajectory of the first water outlet hole diversified, thereby increasing the complexity of the flushing path, improving the flushing uniformity and reducing the flushing dead angle, thereby improving the flushing effect and water saving effect;

[0035] 3. By setting a second sliding sleeve and a second water outlet plate, the second sliding sleeve reciprocates through a rotating ring and a connecting rod transmission ring, so as to force the boundary line between the outer shape deformation part and the inner shape deformation part of the second water outlet plate to be intermittently deformed to an outer convex or inner concave state, so that the water flow ejected by the outer shape deformation part and the inner shape deformation part and the second water outlet hole is offset toward or away from each other, further improving the complexity of the flushing path and the flushing density, thereby improving the flushing uniformity and reducing the flushing dead angle, thereby improving the flushing effect and water saving effect;

[0036] 4. By setting up the third replacement water outlet component, it can effectively capture the dust in the air, and can also evenly replenish water for green plants and create a humid environment. The annular nozzle will spray out a hollow cone-shaped large-particle water mist, forming an anti-escape boundary on the outside of the cone-shaped small-particle water mist to prevent excessive diffusion of small-particle water mist, resulting in unclear vision and water waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0038] Figure 2 It is a partial cross-sectional view of the overall structure of Example 1.

[0039] Figure 3 It is a schematic diagram of the first replacement water outlet component of Example 1.

[0040] Figure 4 This is a cross-sectional view of the rotary head of Example 1.

[0041] Figure 5 It is a schematic diagram of the first water outlet plate of Example 2.

[0042] Figure 6 It is a cross-sectional view of the rotary head of Example 2.

[0043] Figure 7 It is a schematic diagram of the first wave protrusion of Example 2.

[0044] Figure 8 It is a schematic diagram of the second water outlet plate of Example 3.

[0045] Fig. 9 This is a cross-sectional view of the rotary head of Example 3.

[0046] Fig.10 It is a schematic diagram of the second water outlet plate of Example 4.

[0047] Fig.11 It is a cross-sectional view of the second water outlet plate of Example 4.

[0048] Fig.12 This is a cross-sectional view of the rotary head of Example 5.

[0049] Explanation of reference numerals: 1. first replacement water outlet assembly; 2. second replacement water outlet assembly; 3. rotating tube; 6. third replacement water outlet assembly; 10. gun body; 101. rotating head; 1011. convex ring; 1012. end wall; 1013. disc spring; 1015. cavity opening; 1016. transfer cavity; 102. water inlet pipe; 103. rotating joint; 11. mounting plate; 111. conical tube; 112. rotating rod ; 113, eccentric rod; 114, first bolt; 115, rubber tube; 12, nozzle; 13, connecting rod; 131, strip hole; 14, slide rail; 15, connecting arm; 16, rectangular frame; 21, porous plate; 22, first water outlet plate; 221, first water outlet hole; 222, first mounting ring; 223, steel bar; 23, first anti-slip sleeve; 24, first anti-slip block; 241, first slide sleeve; 242, first a slider; 243, a first wave protrusion; 244, a first abutment rod; 25, a second water outlet plate; 251, an outer deformation part; 252, an inner deformation part; 253, a second water outlet hole; 254, a second mounting ring; 255, a transmission ring; 26, a second anti-slip sleeve; 261, a second anti-slip block; 262, a second bolt; 27, a second sliding sleeve; 271, a rotating ring; 272, a connecting rod; 273, a second wave protrusion; 274, a second slider; 28, a second abutment rod; 31, a water outlet; 32, a first threaded hole; 33, a first slide groove; 34, a second threaded hole; 35, a second slide groove; 51, a driving motor; 52, a gear ring; 53, a central gear; 54, a planetary gear; 55, a planetary carrier; 56, a support rod; 61, a water mist nozzle; 62, a quick-connect water pipe; 63, an annular cavity; 64, a jet port; 65, a water inlet. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-12 This application is described in further detail.

[0051] Embodiment 1 of the present application discloses a rotary water spray gun.

[0052] Reference Figure 1 and Figure 2 The rotary water spray gun includes a gun body 10, a rotating head 101, a rotating tube 3, a rotating drive assembly, a first replacement water outlet assembly 1 and a second replacement water outlet assembly 2, wherein the second replacement water outlet assembly 2 and the first replacement water outlet assembly 1 are respectively detachably connected to the rotating head 101, the second replacement water outlet assembly 2 is used to output a uniform water flow to achieve a wide range of conventional flushing, and the first replacement water outlet assembly 1 is used to output two swinging water flows, which are strong water flows to achieve strong flushing of stubborn dirt.

[0053] like Figure 2As shown, the rotating head 101 is a tubular structure, and the rotating head 101 is rotatably connected to the front end of the gun body 10. Specifically, a convex ring 1011 is fixed to the outer peripheral surface of the front end of the gun body 10, and an annular end wall 1012 is fixed to one end of the rotating head 101. The end wall 1012 is closer to the rear end of the gun body 10 relative to the convex ring 1011, and the inner diameter of the end wall 1012 fits the outer peripheral surface of the front end of the gun body 10, and a disc spring 1013 is provided between the end wall 1012 and the convex ring 1011, and the two ends of the disc spring 1013 are respectively abutted on the opposite surfaces of the convex ring 1011 and the end wall 1012, and the elastic force of the disc spring 1013 is used to force the rotating head 101 to move in a direction away from the front end of the gun body 10.

[0054] like Figure 2 As shown, a transfer cavity 1016 is fixed in the rotating head 101 . The transfer cavity 1016 is conical, and a large port of the transfer cavity 1016 is far away from the rear end of the gun body 10 . The large port is set as a cavity opening 1015 .

[0055] like Figure 2 As shown, the rotating tube 3 is located in the gun body 10, the rotating tube 3 is coaxially arranged with the rotating head 101, the rotating tube 3 is rotatably connected to the gun body 10, a water inlet pipe 102 is fixed in the gun body 10, the water inlet pipe 102 is vertically arranged, and the upper end of the water inlet pipe 102 is connected to the middle part of the rotating tube 3 through a rotating joint 103, that is, to ensure that there is continuous input of water during the rotation of the rotating tube 3; one end of the rotating tube 3 passes through the transfer cavity 1016, the rotating tube 3 and the transfer cavity 1016 are sealed and rotatably connected, and the portion of the rotating tube 3 located inside the transfer cavity 1016 is provided with a water outlet 31, that is, the water in the water inlet pipe 102 will enter the interior of the transfer cavity 1016 through the rotating joint 103, the rotating tube 3, and the water outlet 31.

[0056] like Figure 2 As shown, the rotation drive assembly is used to drive the rotating tube 3 and the rotating head 101 to rotate respectively, and the rotation speed of the rotating tube 3 is greater than the rotation speed of the rotating head 101. Specifically, the rotation drive assembly includes a driving motor 51, a ring gear 52, three planetary gears 54, a central gear 53 and a planet carrier 55, wherein the driving motor 51 is installed at the rear end of the gun body 10, the rotating tube 3 is coaxially fixed with the driving motor 51, the central gear 53 is sleeved and fixed on the rotating tube 3, the ring gear 52 is coaxial with the central gear 53, and the ring gear 52 is fixed to the inner cavity of the gun body 10, the planetary gears 54 are respectively meshed with the ring gear 52 and the central gear 53, the planet carrier 55 is connected to the planetary gears 54, and the planet carrier 55 is fixedly connected to the inner wall of the rotating head 101 through the support rod 56.

[0057] The driving motor 51 drives the rotating tube 3 to rotate, and the central gear 53 drives the planetary gear 54 to rotate and revolve, thereby driving the planetary carrier 55 and the rotating head 101 to rotate.

[0058] like Figure 2 As shown, the second replacement water outlet component 2 includes a porous plate 21, which is circular. The outer peripheral surface of the porous plate 21 is threadedly connected to the inner wall of the cavity 1015. That is, when uniform water flow is required, the porous plate 21 is installed on the rotating head 101 to output multiple uniform water flow for large-scale flushing, and the rotating head 101 continues to rotate under the drive of the rotating drive component, so that the water flushing is more uniform.

[0059] like Figure 3 , Figure 4 As shown, the first replacement water outlet component 1 includes a circular mounting plate 11, two nozzles 12 and a swing transmission structure. The mounting plate 11 can be detachably installed in the cavity 1015, and the specific detachable form can be a threaded connection. The outer surface of the mounting plate 11 is integrally formed with two conical tubes 111, and the two conical tubes 111 are symmetrically arranged with the axis of the mounting plate 11 as the center. The large port of the conical tube 111 is connected to the inner cavity of the transfer cavity 1016, and the small port of the conical tube 111 is fixed with a rubber tube 115, and the other end of the rubber tube 115 is fixedly connected to the nozzle 12. Therefore, the water in the transfer cavity 1016 can be sprayed out from the nozzle 12 through the conical tube 111 and the rubber tube 115 in turn, and because the rubber tube 115 is elastic, the position of the nozzle 12 is movable.

[0060] like Figure 3 , Figure 4 As shown, the middle part of the mounting plate 11 is connected with a rotating rod 112 which rotates around its own axis. The rotating rod 112 is coaxially arranged with the rotating tube 3. A first bolt 114 is fixed to one end of the rotating rod 112. A first threaded hole 32 for threaded connection of the first bolt 114 is provided at the end of the rotating tube 3. That is, the rotating rod 112 can be fixedly connected with the rotating tube 3. The swing transmission structure is used to convert the torque of the rotating rod 112 into a force to drive the nozzle 12 to swing back and forth. In addition, the swing plane of the nozzle 12 is parallel to the axis of the rotating tube 3, and there is an angle between the swing plane of the nozzle 12 and the plane passing through the axis of the rotating tube 3 and the nozzle 12.

[0061] Specifically, the swing transmission structure includes a connecting arm 15, a slide rail 14, a rectangular frame 16 and a connecting rod 13, wherein the slide rail 14 is arranged one-to-one corresponding to the nozzle 12, the slide rail 14 is fixed to the outer surface of the mounting plate 11, and the two slide rails 14 are respectively located in the swing plane of the corresponding nozzle 12.

[0062] The connecting arm 15 is slidably connected to the slide rail 14, the rectangular frame 16 is sleeved on the outside of the nozzle 12, the connecting arm 15 is fixedly connected to the rectangular frame 16, the two ends of the connecting rod 13 are respectively fixedly connected to the two connecting arms 15, the connecting rod 13 is perpendicular to the connecting arm 15, and the connecting rod 13 is parallel to the end face of the rotating rod 112.

[0063] The connecting rod 13 is provided with a strip hole 131 extending along the length of the connecting rod 13 . A circular eccentric rod 113 is eccentrically fixed to the end surface of the rotating rod 112 . The eccentric rod 113 is slidably connected to the strip hole 131 .

[0064] The rotating tube 3 drives the eccentric rod 113 to rotate eccentrically through the rotating rod 112, and the eccentric force of the eccentric rod 113 is applied to the connecting rod 13 through the cooperation of the strip hole 131, so as to drive the connecting rod 13 and the connecting arm 15 to move back and forth along the direction of the slide rail 14. Finally, the reciprocating swinging force of the connecting arm 15 is transmitted to the nozzle 12 through the rectangular frame 16, so as to drive the nozzle 12 to swing back and forth. At the same time, the rotating head 101 also drives the nozzle 12 to rotate around the axis of the rotating tube 3, so that the two movement modes of the nozzle 12 are superimposed, and the movement trajectory of the nozzle 12 is diversified, so that the strong water flow sprayed by the nozzle 12 has various angles relative to the surface to be washed (such as the car surface), so that the scouring force can be applied to the stubborn dirt from different angles to speed up the removal of the dirt, and the scouring dead angle of the surface to be washed can be reduced, that is, the scouring effect and the comprehensiveness of the scouring are improved.

[0065] Example 2

[0066] The difference between Example 2 and Example 1 is that Figure 5 , Figure 6 As shown, the second replacement water outlet assembly 2 includes a first mounting ring 222, a first water outlet plate 22 and a first sliding sleeve 241, wherein the first water outlet plate 22 is made of rubber, and a plurality of steel bars 223 are embedded in the first water outlet plate 22, the steel bars 223 are radially extended along the first water outlet plate 22, and each steel bar 223 is evenly arranged along the circumference of the first water outlet plate 22, and the first water outlet plate 22 is provided with densely distributed first water outlet holes 221.

[0067] like Figure 6 As shown, the first mounting ring 222 is sleeved and fixed on the outer circumferential surface of the first water outlet plate 22, the first mounting ring 222 is threadedly connected to the inner wall of the cavity 1015, the first sliding sleeve 241 is rotatably connected to the middle part of the first water outlet plate 22, and the first sliding sleeve 241 is non-rotatably and slidingly connected to the end of the rotating tube 3. Specifically, a first anti-slip sleeve 23 is fixed to the central part of the first water outlet plate 22, and a first anti-slip block 24 is fixed to one end of the first sliding sleeve 241. The first anti-slip block 24 is rotatably connected to the first anti-slip sleeve 23, and the stability of the rotational connection is ensured by anti-slip cooperation. In addition, the first anti-slip block 24 and the first anti-slip sleeve 23 are both made of POM material, which has a high hardness and strong self-lubricating property, and can greatly reduce the friction between the two.

[0068] like Figure 6As shown, the first sleeve 241 is sleeved on the end of the rotating tube 3, and the inner wall of the first sleeve 241 is fixed with a first slider 242 extending along its own axial direction, and the outer peripheral surface of the rotating tube 3 is fixed with a first slide groove 33. Through the cooperation of the first slider 242 and the first slide groove 33, the first sleeve 241 can slide axially relative to the rotating tube 3, and can also transmit the torque of the rotating tube 3 to the first sleeve 241.

[0069] like Figure 6 , Figure 7 As shown, a first annular wave protrusion 243 is fixed to the end of the first sliding sleeve 241, the first wave protrusion 243 is coaxial with the rotating tube 3, the wave arc surface of the first wave protrusion 243 has a crest and a trough, the wave arc surface of the first wave protrusion 243 faces the cavity mouth 1015, and the rotating head 101 slides along its own radial direction and is penetrated by a first abutment rod 244, and the outer wall of the first abutment rod 244 abuts against the wave arc surface of the first wave protrusion 243.

[0070] When the rotating tube 3 rotates, the first sliding sleeve 241 and the first wave protrusion 243 will be driven to rotate. Through the cooperation between the first wave protrusion 243 and the first abutting rod 244, and the pressure of the water in the transfer cavity 1016 on the first water outlet plate 22 (the pressure forces the first sliding sleeve 241 to move forward so that the first wave protrusion 243 is close to the first abutting rod 244), the first sliding sleeve 241 will be driven to reciprocate along the axial direction of the rotating tube 3. The first sliding sleeve 241 will drive the central part of the first water outlet plate 22 to reciprocate, that is, the central part of the first water outlet plate 22 is forced to intermittently move. The rotating head 101 and the first water outlet plate 22 are deformed into a convex or concave state, thereby changing the spray angle of the first water outlet hole 221 (when the first water outlet plate 22 is convex, the first water outlet hole 221 is inclined outward, and when the first water outlet plate 22 is concave, the first water outlet hole 221 is inclined inward), that is, the water flow sprayed by the first water outlet hole 221 will swing back and forth, and combined with the low-speed rotation of the rotating head 101 and the first water outlet plate 22, the water flow trajectory of the first water outlet hole 221 is diversified, thereby increasing the complexity of the flushing path, so as to improve the flushing uniformity and reduce the flushing dead angle, thereby improving the flushing effect and water-saving effect.

[0071] Example 3

[0072] The difference between Example 3 and Example 1 is that Figure 8 , Fig. 9As shown, the second replacement water outlet assembly 2 includes a second mounting ring 254, a second water outlet plate 25, a second sliding sleeve 27, a connecting rod 272 and a rotating ring 271, wherein the second water outlet plate 25 is made of rubber, and is provided with densely distributed second water outlet holes 253. The second water outlet plate 25 is divided into an annular outer shape deformation portion 251 and an annular inner shape deformation portion 252 from the outside to the inside, and the second water outlet holes 253 of the outer shape deformation portion 251 and the second water outlet holes 253 of the inner shape deformation portion 252 are circumferentially staggered, and a transmission ring 255 is embedded at the dividing line between the outer shape deformation portion 251 and the inner shape deformation portion 252, and the transmission ring 255 is coaxially arranged with the second water outlet plate 25.

[0073] like Fig. 9 As shown, the second mounting ring 254 is sleeved and fixed on the outer peripheral surface of the second water outlet plate 25, the second mounting ring 254 is threadedly connected to the inner wall of the cavity 1015, and the end of the rotating tube 3 is rotatably connected to the middle part of the second water outlet plate 25. Specifically, the center part of the second water outlet plate 25 is integrally formed with a second anti-slip sleeve 26, and the second anti-slip block 261 made of rubber is rotatably connected in the second anti-slip sleeve 26, and the stability of the rotation connection is ensured by anti-slip cooperation, and the contact surface of the second anti-slip sleeve 26 and the second anti-slip block 261 is provided with two metal gaskets (not shown in the figure) to reduce the friction effect between the two. The second anti-slip block 261 is fixed with a second bolt 262 at one end away from the second anti-slip sleeve 26, and the end of the rotating tube 3 is provided with a second threaded hole 34, and the second bolt 262 and the second threaded hole 34 cooperate to achieve a fixed connection between the second anti-slip block 261 and the rotating tube 3.

[0074] The second sleeve 27 is connected to the rotating tube 3 in a non-rotational and sliding manner. Specifically, the second sleeve 27 is sleeved on the outside of the rotating tube 3. A second slider 274 is fixed to the inner wall of the second sleeve 27. The second slider 274 extends along the axial direction of the second sleeve 27. A second slide groove 35 is fixed to the outer peripheral surface of the rotating tube 3. Through the cooperation between the second slider 274 and the second slide groove 35, the second sleeve 27 can slide axially relative to the rotating tube 3 and can also transmit the torque of the rotating tube 3 to the second sleeve 27.

[0075] The rotating ring 271 is rotatably sleeved on the second sliding sleeve 27, one end of the connecting rod 272 is fixedly connected to the rotating ring 271, and the other end of the connecting rod 272 is hingedly connected to the transmission ring 255, that is, the sliding of the second sliding sleeve 27 will drive the transmission ring 255 to move, and the torque of the second sliding sleeve 27 will not be transmitted to the connecting rod 272.

[0076] A second annular wave protrusion 273 is fixed to the end of the second sliding sleeve 27, and the second wave protrusion 273 is coaxial with the rotating tube 3. The wave arc surface of the second wave protrusion 273 has a crest and a trough, and the arc surface of the second wave protrusion 273 faces the cavity opening 1015. The rotating head 101 slides along its own radial direction and is penetrated by a second abutment rod 28, and the outer wall of the second abutment rod 28 abuts against the arc surface of the second wave protrusion 273.

[0077] When the rotating tube 3 rotates, the second sliding sleeve 27 will be driven to rotate. Through the cooperation between the second wave protrusion 273 and the first abutting rod 244, and the pressure of the water in the transfer cavity 1016 on the second water outlet plate 25 (the pressure forces the second water outlet plate 25 and the second sliding sleeve 27 to move forward so that the second wave protrusion 273 is close to the second abutting rod 28), the second sliding sleeve 27 will be driven to reciprocate along the axial direction of the rotating tube 3. The second sliding sleeve 27 will reciprocate through the rotating ring 271 and the connecting rod 272 transmission ring 255 to force the boundary line between the outer shape deformation part 251 and the inner deformation part 252 of the second water outlet plate 25 to intermittently deform to a convex or concave state, thereby changing the second outer shape deformation part 251 and the inner deformation part 252. The spray angle of the water outlet 253, when the boundary line between the outer deformation part 251 and the inner deformation part 252 is deformed into a convex shape, the second water outlet hole 253 of the outer deformation part 251 is inclined outward, and the second water outlet hole 253 of the inner deformation part 252 is inclined inward; when the boundary line between the outer deformation part 251 and the inner deformation part 252 is deformed into a concave shape, the second water outlet hole 253 of the outer deformation part 251 is inclined inward, and the second water outlet hole 253 of the inner deformation part 252 is inclined outward, that is, the water flow sprayed by the outer deformation part 251, the inner deformation part 252 and the second water outlet hole 253 are offset towards or away from each other, further increasing the complexity of the flushing path and the flushing density, thereby improving the flushing uniformity and reducing the flushing dead angle, thereby improving the flushing effect and the water-saving effect.

[0078] Example 4

[0079] The difference between Example 4 and Example 3 is that Fig.10 , Fig.11 As shown, the second water outlet hole 253 is an elliptical hole, and the center of the second water outlet plate 25 is recessed toward the rotating tube 3 .

[0080] The second anti-slip block 261 and the second anti-slip sleeve 26 are in direct contact with each other, so that there is greater friction between the contact surfaces of the two. In order to increase the friction force, resistance-increasing patterns can be provided on the contact surfaces of the two.

[0081] When the rotating tube 3 rotates, the torque of the rotating tube 3 is transmitted to the second water outlet plate 25 through the friction between the second anti-slip block 261 and the second anti-slip sleeve 26 and forces the second water outlet plate 25 to rotate and deform, and the aperture of the second water outlet hole 253 becomes smaller. Moreover, when the friction between the second anti-slip block 261 and the second anti-slip sleeve 26 is less than the deformation reaction force of the second water outlet plate 25, the second water outlet plate 25 stops continuing to rotate and deform, that is, the deformation state of the second water outlet plate 25 is maintained.

[0082] Therefore, by applying rotational deformation to the second water outlet plate 25, the aperture of the second water outlet hole 253 will be controlled to increase the injection speed of the water flow. Secondly, after the second water outlet plate 25 is rotationally deformed, the rigidity of the second water outlet plate 25 is enhanced, making it less likely to cause a large deformation due to excessive water pressure, thereby ensuring the accuracy of the deformation offset of the outer deformation part 251 and the inner deformation part 252 when the transmission ring 255 moves.

[0083] Finally, the concave setting at the center of the second water outlet plate 25 can guide the deformation state of the second water outlet plate 25 after rotational deformation, so that the second water outlet plate 25 is regularly deformed.

[0084] Example 5

[0085] The difference between Example 5 and Example 1 is that Fig.12 As shown, the rotary water spray gun also includes a third replacement water outlet component 6, which is mainly suitable for watering green plants and increasing the air humidity in the garden.

[0086] The third replacement water outlet component 6 includes a water mist nozzle 61 and a quick-connect water pipe 62. The water mist nozzle 61 is threadedly connected to the end of the rotating tube 3, and the water outlet 31 of the rotating tube 3 is connected to the inner cavity of the water mist nozzle 61, that is, the water in the rotating tube 3 directly enters the water mist nozzle 61 to spray conical small-particle water mist. The small-particle water mist has a large density and can effectively capture dust in the air. At the same time, it can also evenly replenish water for green plants and create a humid environment.

[0087] The tube wall of the rotating head 101 is provided with an annular cavity 63, the annular cavity 63 is provided with an annular injection port 64 connected to the end face of the rotating head 101, the outer peripheral surface of the rotating head 101 is provided with a water inlet 65 connected to the annular cavity 63, and the quick-connect water pipe 62 is detachably connected to the water inlet 65, that is, the water in the quick-connect water pipe 62 will pass through the water inlet 65 and the annular cavity 63 and be sprayed out from the injection port 64 to output a hollow cone-shaped large-particle water mist, which can increase the amount of water replenishment.

[0088] Moreover, since the particle size of the droplets sprayed from the injection port 64 is larger than that of the water mist nozzle 61, the large-particle water mist in the hollow cone can also form an anti-escape boundary on the outside of the small-particle water mist in the cone, and utilize the characteristic of large-particle water mist that can capture the escaping small-particle water mist to prevent the excessive diffusion of small-particle water mist, thereby causing unclear vision and water waste.

[0089] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotary water spray gun, characterized in that: The invention comprises a gun body (10), a rotating head (101), a rotating tube (3), a rotating drive assembly, a first water outlet replacement assembly (1) and a second water outlet replacement assembly (2), wherein the rotating head (101) is rotatably connected to the gun body (10), the rotating tube (3) is coaxial with the rotating axis of the rotating head (101), the rotating tube (3) is connected to the water inlet end of the gun body (10), a transfer cavity (1016) is fixed in the rotating head (101), and the transfer cavity (1016) is One end away from the rotating tube (3) has a cavity opening (1015), and a portion of the rotating tube (3) located inside the transfer cavity (1016) is provided with a water outlet (31); the rotating drive assembly is used to drive the rotating tube (3) and the rotating head (101) to rotate, and the rotation speed of the rotating tube (3) is greater than the rotation speed of the rotating head (101); the second replacement water outlet assembly (2) and the first replacement water outlet assembly (1) are respectively detachably connected to the rotating head (101), the second replacement water outlet assembly (2) is used to output a uniform water flow, and the first replacement water outlet assembly (1) is used to output two oscillating water flows; the first replacement water outlet assembly (1) comprises a circular mounting plate (11), two spray heads (12) and an oscillating transmission structure, the mounting plate (11) is detachably mounted in the cavity opening (1015), the two spray heads (12) are symmetrically mounted on the mounting plate (11) with the axis of the mounting plate (11) as the center, and the spray heads (12) are movably mounted on the transfer cavity (101) 6), the middle part of the mounting plate (11) is rotatably connected to a rotating rod (112), the rotating rod (112) is coaxially detachably connected to the rotating tube (3), the swing transmission structure is used to convert the torque of the rotating rod (112) into a force driving the nozzle (12) to swing back and forth, the swing plane of the nozzle (12) is parallel to the axis of the rotating tube (3), and there is an angle between the swing plane of the nozzle (12) and the plane passing through the axis of the rotating tube (3) and the nozzle (12).

2. The rotary water spray gun according to claim 1, characterized in that: The swing transmission structure comprises a connecting arm (15), a slide rail (14), a rectangular frame (16) and a connecting rod (13), wherein the slide rail (14) is fixed to the outer surface of the mounting plate (11), the slide rail (14) is located in the swing plane of the nozzle (12), the connecting arm (15) is slidably connected to the slide rail (14), the rectangular frame (16) is sleeved on the outer side of the nozzle (12), the connecting arm (15) is fixedly connected to the rectangular frame (16), the two ends of the connecting rod (13) are respectively fixedly connected to the two connecting arms (15), the connecting rod (13) is perpendicular to the connecting arm (15), and a strip hole (131) extending along the length of the connecting rod (13) is provided on the connecting rod (13), and a cylindrical eccentric rod (113) is eccentrically fixed to the end surface of the rotating rod (112), and the eccentric rod (113) is slidably connected to the strip hole (131).

3. The rotary water spray gun according to claim 1 or 2, characterized in that: A conical tube (111) is integrally formed on the outer surface of the mounting plate (11), the large end of the conical tube (111) is in communication with the inner cavity of the transfer cavity (1016), the small end of the conical tube (111) is fixed with a rubber tube (115), and the other end of the rubber tube (115) is fixedly connected to the nozzle (12).

4. The rotary water spray gun according to claim 1, characterized in that: The second replacement water outlet assembly (2) comprises a first mounting ring (222), a first water outlet plate (22) made of rubber material, and a first sliding sleeve (241); the first mounting ring (222) is sleeved and fixed on the outer peripheral surface of the first water outlet plate (22); the first mounting ring (222) is threadedly connected to the inner wall of the cavity opening (1015); the first water outlet plate (22) is provided with densely distributed first water outlet holes (221); the first sliding sleeve (241) is rotatably connected to the middle part of the first water outlet plate (22); the first sliding sleeve (241) is connected to the end of the rotating tube (3) in a non-rotating and sliding manner, and a first annular wave protrusion (243) is fixed to the end of the first sliding sleeve (241), the first wave protrusion (243) has a wave crest and a wave trough, and the arc surface of the first wave protrusion (243) faces the cavity opening (1015), and the rotating head (101) is slidably penetrated by a first abutment rod (244) along its own radial direction, and the outer wall of the first abutment rod (244) abuts against the arc surface of the first wave protrusion (243).

5. The rotary water spray gun according to claim 4, characterized in that: A first anti-slip sleeve (23) made of POM material is fixed to the central part of the first water outlet plate (22); a first anti-slip block (24) made of POM material is fixed to one end of the first sliding sleeve (241); the first anti-slip block (24) is rotatably connected to the first anti-slip sleeve (23); a plurality of steel bars (223) are embedded in the first water outlet plate (22); the steel bars (223) extend radially along the first water outlet plate (22).

6. The rotary water spray gun according to claim 1, characterized in that: The second replacement water outlet assembly (2) comprises a second mounting ring (254), a second water outlet plate (25) made of rubber, a second sliding sleeve (27), a connecting rod (272) and a rotating ring (271); the second mounting ring (254) is sleeved and fixed on the outer peripheral surface of the second water outlet plate (25); the second mounting ring (254) is threadedly connected to the inner wall of the cavity opening (1015); the second water outlet plate (25) is provided with densely distributed second water outlet holes (253); the second water outlet plate (25) is divided into an annular outer shape deformation part (251) and an annular inner shape deformation part (252) from the outside to the inside; the second water outlet holes (253) of the outer shape deformation part (251) and the second water outlet holes (253) of the inner shape deformation part (252) are circumferentially staggered; a transmission ring (271) is provided at the boundary between the outer shape deformation part (251) and the inner shape deformation part (252). 255); the end of the rotating tube (3) is rotatably connected to the middle of the second water outlet plate (25); the second sliding sleeve (27) is slidably connected to the rotating tube (3) in a non-rotating manner; the rotating ring (271) is rotatably sleeved on the second sliding sleeve (27); one end of the connecting rod (272) is fixedly connected to the rotating ring (271); the other end of the connecting rod (272) is hingedly connected to the transmission ring (255); an annular second wave protrusion (273) is fixed to the end of the second sliding sleeve (27); the second wave protrusion (273) has a wave crest and a wave trough; the arc surface of the second wave protrusion (273) faces the cavity (1015); the rotating head (101) is slidably penetrated by a second abutting rod (28) along its radial direction; the outer wall of the second abutting rod (28) abuts against the arc surface of the second wave protrusion (273).

7. The rotary water spray gun according to claim 6, characterized in that: The second water outlet hole (253) is an elliptical hole, and the central part of the second water outlet plate (25) is recessed in the direction of the rotating tube (3); a second anti-slip sleeve (26) is integrally formed at the central part of the second water outlet plate (25), and a second anti-slip block (261) made of rubber is rotatably connected in the second anti-slip sleeve (26), and the second anti-slip block (261) is threadedly connected to the end of the rotating tube (3); when the rotating tube (3) rotates, the torque of the rotating tube (3) is transmitted to the second water outlet plate (25) through the friction force between the second anti-slip block (261) and the second anti-slip sleeve (26), and the second water outlet plate (25) is forced to rotate and deform, and the aperture of the second water outlet hole (253) becomes smaller; when the friction force between the second anti-slip block (261) and the second anti-slip sleeve (26) is smaller than the deformation reaction force of the second water outlet plate (25), the second water outlet plate (25) stops rotating and deforming.

8. The rotary water spray gun according to claim 1, characterized in that: The invention also comprises a third replacement water outlet assembly (6), the third replacement water outlet assembly (6) comprising a water mist nozzle (61) and a quick-connect water pipe (62), the water mist nozzle (61) being threadedly connected to the end of the rotating tube (3), the water outlet (31) being connected to the inner cavity of the water mist nozzle (61); an annular cavity (63) is provided on the tube wall of the rotating head (101), the annular cavity (63) is provided with an annular injection port (64) connected to the end surface of the rotating head (101), the outer peripheral surface of the rotating head (101) is provided with a water inlet (65) connected to the annular cavity (63), and the quick-connect water pipe (62) is detachably connected to the water inlet (65); the particle size of the mist droplets sprayed by the injection port (64) is larger than the particle size of the mist droplets of the water mist nozzle (61).

9. The rotary water spray gun according to claim 1, characterized in that: The rotation drive assembly comprises a drive motor (51), a ring gear (52), three planetary gears (54), a central gear (53) and a planet carrier (55), wherein the drive motor (51) is mounted on the rear end of the gun body (10), the rotation tube (3) and the drive motor (51) are coaxially fixed, the central gear (53) is sleeved and fixed on the rotation tube (3), the ring gear (52) is fixed to the gun body (10) and the ring gear (52) and the central gear (53) are coaxial, the planetary gears (54) are respectively meshed with the ring gear (52) and the central gear (53), the planet carrier (55) is connected to the planetary gears (54), and the planet carrier (55) and the rotating head (101) are relatively fixedly arranged.

10. The rotary water spray gun according to claim 1, characterized in that: A convex ring (1011) coaxial with the rotating tube (3) is fixed to the gun body (10); an end of the rotating head (101) away from the cavity opening (1015) is provided with an end wall (1012); a disc spring (1013) is provided between the end wall (1012) and the convex ring (1011); the elastic force of the disc spring (1013) is used to force the rotating head (101) to move in a direction away from the cavity opening (1015).

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