CN113209647B - Water rocket - Google Patents

Abstract

The invention relates to a water rocket, comprising: the arrow body is hollow, and a first connecting part is formed on the lower end part of the arrow body; the base comprises a mounting seat and a plurality of elastic tail wings which are detachably connected to the mounting seat, a first through hole is formed in the mounting seat, and the mounting seat is detachably connected to the first connecting part; the sealing device comprises a sealing column and a sealing ring arranged at the upper end part of the sealing column, and the upper end part of the sealing column is inserted into the first through hole; and the inflation device comprises an inflation pipeline and an inflator, one end of the inflation pipeline is connected with the inflator, and the other end of the inflation pipeline is connected with the sealing device. According to the technical scheme, the base is arranged at the lower end of the rocket body, the sealing device is connected with the base, one end of the inflation pipeline is connected with the sealing device, the other end of the inflation pipeline is connected with the inflator pump, the water rocket is inflated without backflow, the inflation pipeline can be lengthened, the flying height can be controlled by the number of the sealing rings, and the rocket has good applicability.

Description

Water rocket

Technical Field

The invention relates to the field of educational toys, in particular to a water rocket.

Background

The water rocket is also called a pneumatic water-spraying rocket and a water-propelling rocket, and is an experimental device/equipment designed by utilizing the mass ratio and the pneumatic action. The principle is that air is filled into a closed rocket body filled with a certain amount of water, the air pressure in the rocket body rises to burst a sealing plug at the bottom, so that the water is quickly sprayed out, the rocket body obtains upward reverse thrust, and the rocket body rises to be ejected like a rocket, so that the water rocket is named.

The existing water rockets all comprise a rocket body, a base, a sealing device and an inflating device, but the existing water rockets are single in playing method and less in change, so that the entertainment and the practicability are poor. The existing base cannot deform, so that the water rocket can only rise linearly and is lack of change, and the practicability is poor; the existing sealing device only has the sealing function and cannot control the rising height of the water rocket by changing the sealing degree, so that the existing water rocket has poor adaptability to different fields; the inflation device comprises an inflation pipeline and an inflator, the existing inflation pipeline only can keep the original length, and a plurality of short pipeline bodies cannot be combined into a long pipeline body, so that the distance between a user and the water rocket cannot be changed according to actual requirements, and the practicability is poor; moreover, the existing inflator has poor effect of preventing gas from flowing reversely, and a user is time-consuming and labor-consuming when inflating.

Disclosure of Invention

The invention aims to provide a water rocket which can rotate along various orbits to ascend, and the ascending height of the water rocket is controllable; and the inflation device has the characteristics of preventing air backflow, adjusting the length of the inflation pipeline and the like, and has better applicability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a water rocket comprising: the arrow body is hollow, and a first connecting part is formed on the lower end part of the arrow body; the base comprises a mounting seat and a plurality of elastic tail wings which are detachably connected to the mounting seat, a first through hole is formed in the mounting seat, and the mounting seat is detachably connected to the first connecting part; the sealing device comprises a sealing column and a sealing ring arranged at the upper end part of the sealing column, and the upper end part of the sealing column is inserted into the first through hole; and the inflation device comprises an inflation pipeline and an inflator, one end of the inflation pipeline is connected with the inflator, and the other end of the inflation pipeline is connected with the sealing device.

Preferably, the side still is equipped with first recess on the mount pad, the base still including set up in a sealing cylinder in the first recess, first through-hole set up in the sealing cylinder, the sealing cylinder insert locate in first connecting portion, first connecting portion with first recess detachable connection.

Preferably, a plurality of clamping portions are sequentially arranged on the outer side surface of the mounting seat and are arranged in a surrounding mode, clamping columns are arranged at one end of each elastic tail wing, and the clamping columns are clamped in the clamping portions in a one-to-one correspondence mode.

Preferably, be equipped with a plurality of annular mounting grooves on the sealing post upper end lateral surface, the sealing washer is established to one or more to the one-to-one set up in the annular mounting groove, just the sealing washer with first through-hole inner wall interference fit.

Preferably, the inflation pipeline comprises a pipeline body, a connecting piece and a plug connector, the connecting piece comprises a first portion and a second portion which are connected and arranged, the first portion is connected with one pipeline body, a connecting hole is formed in the second portion, the plug connector comprises a third portion and a plug column which are connected and arranged, the third portion is connected with the other pipeline body, and the plug column is inserted and fixed in the connecting hole.

Preferably, the inflator pump comprises a cylinder body, a cylinder cover and a cylinder base, the cylinder body is hollow, the cylinder cover is arranged on the upper end portion of the cylinder body, and the lower end portion of the cylinder body is fixedly connected with the cylinder base.

Preferably, the inflator pump further comprises a handle, a connecting rod and a piston, the middle part of the connecting rod is movably arranged in the cylinder cover, the handle is arranged at the upper end part of the connecting rod and is positioned at the upper side of the cylinder body, and the piston is arranged at the lower end part of the connecting rod and is vertically movable in the cylinder body.

Preferably, the cylinder seat is provided with an air through column, the upper end of the air through column extends into the cylinder and is positioned at the lower side of the piston, and the upper end part of the air through column is also provided with a second through hole; and a second groove is formed in the lower end part of the ventilation column, and the second groove is communicated with the second through hole.

Preferably, the inflator further comprises a ball arranged in the second groove, and the diameter of the ball is larger than that of the second through hole; the inflator pump further comprises an adapter, the lower end of the adapter is connected with the pipeline body, the upper end portion of the adapter is inserted into the second groove, and the ball is located between the second through hole and the upper end portion of the adapter.

Preferably, the upper end part of the adapter is also provided with a third through hole and a notch, and the diameter of the third through hole is smaller than that of the ball; the notch penetrates through the side face of the adapter piece and is communicated with the third through hole.

Compared with the prior art, the invention has the beneficial effects that:

according to the water rocket provided by the technical scheme, the first connecting portion are formed at the lower end of the rocket body, the base comprises the mounting seat and the plurality of elastic tail wings detachably connected to the mounting seat, the first through hole is further formed in the mounting seat, the sealing device comprises the sealing column and the sealing ring arranged on the sealing column, the upper end of the sealing column is inserted into the first through hole, the inflating device comprises the inflating pipeline and the inflating cylinder, one end of the inflating pipeline is connected with the sealing device, the other end of the inflating pipeline is connected with the inflating cylinder, the inflating cylinder can inflate air into the rocket body, the water rocket can not perform countercurrent inflation, the inflating pipeline can be lengthened, the number control flight height of the sealing ring can be set through the inflating pipeline, the water rocket can rotate to ascend when ascending, and the water rocket has good applicability.

Drawings

Fig. 1 is a schematic view of a water rocket provided in an embodiment of the present invention.

Fig. 2 is a schematic view of an arrow body according to an embodiment of the present invention.

Fig. 3 is a schematic view of a base according to an embodiment of the invention.

Fig. 4 is a schematic view of a mounting base according to an embodiment of the present invention.

Fig. 5 is a schematic view of an elastic tail according to an embodiment of the present invention.

Fig. 6 is a schematic view of a sealing device according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a sealing post according to an embodiment of the present invention.

FIG. 8 is a schematic view of an inflator device according to an embodiment of the present invention.

Fig. 9 is a schematic view of a pipeline body according to an embodiment of the present invention.

Fig. 10 is a schematic view of a connector according to an embodiment of the present invention.

Fig. 11 is a schematic diagram of a plug connector according to an embodiment of the present invention.

Fig. 12 is a schematic view of the assembly of the cartridge and the adaptor according to the embodiment of the present invention.

Fig. 13 is a schematic view of a cartridge according to an embodiment of the present invention.

Fig. 14 is a schematic view of an adaptor and a ball provided in an embodiment of the present invention.

Fig. 15 is a schematic view of another perspective of the cartridge provided in the embodiment of the present invention.

FIG. 16 is a schematic illustration of a connecting rod and piston provided in accordance with an embodiment of the present invention.

1. An arrow body; 11. a first connection portion; 2. a base; 21. a mounting seat; 211. a first through hole; 212. a first groove; 213. a sealing cylinder; 214. a clamping part; 22. an elastic tail; 221. clamping the column; 3. a sealing device; 31. sealing the column; 311. an annular mounting groove; 32. a seal ring; 4. an inflator; 41. an inflation line; 411. a pipeline body; 412. a connecting member; 4121. a first part; 4122. a second section; 413. a plug-in unit; 4131. a third part; 4132. inserting the columns; 42. an inflator; 421. a cylinder body; 422. a cylinder cover; 423. a cartridge holder; 424. a handle; 425. a connecting rod; 426. a piston; 427. ventilating columns; 4271. a second through hole; 4272. a second groove; 428. a ball; 429. an adapter; 4291. a third through hole; 4292. and (4) a notch.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying drawings, in which the description of the invention is given by way of illustration and not of limitation. The various embodiments may be combined with each other to form other embodiments not shown in the following description.

Referring to fig. 1, an embodiment of the present invention provides a water rocket, including: arrow body 1, base 2, sealing device 3 and aerating device 4. The arrow body 1 is hollow, and a first connecting part 11 is formed on the lower end part; the base 2 comprises a mounting seat 21 and a plurality of elastic tail wings 22 detachably connected to the mounting seat 21, a first through hole 211 is formed in the mounting seat 21, and the mounting seat 21 is detachably connected to the first connecting part 11; the sealing device 3 comprises a sealing column 31 and a sealing ring 32 arranged at the upper end part of the sealing column 31, and the upper end part of the sealing column 31 is inserted into the first through hole 211; the inflation device 4 comprises an inflation pipeline 41 and an inflator 42, wherein one end of the inflation pipeline 41 is connected with the inflator 42, and the other end of the inflation pipeline is connected with the sealing device 3.

In the above embodiment, through forming first connecting portion 11 at the lower extreme of rocket body 1, base 2 includes mount pad 21 and can dismantle connect in a plurality of elastic tail 22 on the mount pad 21, still be equipped with first through-hole 211 on the mount pad 21, sealing device 3 includes sealed post 31 and sets up sealing washer 32 on sealed post 31, sealed post 31 upper end is inserted and is located in first through-hole 211, aerating device 4 includes gas filling line 41 and inflator 42, gas filling line 41 one end and sealing device 3 are connected, and the other end is connected with inflator 42, and inflator 42 can fill the air to rocket body 1 in, the water rocket is aerifyd and can not flow against the current, and gas filling line 41 can lengthen, and the flight height can be controlled to the quantity that sets up sealing washer 32, and rotatable rising has better suitability during the rising.

Referring to fig. 2, the arrow body 1 is elongated and hollow. The interior of the arrow body 1 can be filled with partial water, the rest area of the interior can be filled with air, and the proportion of the air and the water can be changed according to the requirement of the actual rising height. And the proportion of the air and the water can correspond to the number and the positions of the sealing rings 32, so that the water rocket can ascend to a preset height. The lower tip of arrow body 1 is formed with first connecting portion 11, the inside cavity of first connecting portion 11, just be equipped with the external screw thread on the lateral surface of first connecting portion 11.

Of course, in other embodiments, the water rocket may further include an arrow, and the arrow includes an arrow body and an arrow clamping portion. The arrow head body is the taper, the upper end of arrow head body is circular-arc, and the surface is smooth not have edges and corners for the arrow head body bumps with the human body, also can not produce great impact. And the tapered arrow body can also reduce the air resistance generated when the water rocket ascends. The arrow body is hollow, so that the overall weight of the arrow body is reduced, the launching height of the water rocket is increased, and the impact force generated when the water rocket descends is reduced due to the reduction of the weight.

More preferably, the arrow body is provided with one arrow through hole, and the arrow through hole is arranged at the upper end of the arrow body. When the water rocket descends, the arrow body collides with the ground or a human body firstly, air inside the arrow body can be discharged through the arrow through holes, the arrow body can be deformed simply, the contact area between the deformed arrow body and the ground or the human body is increased, the impact force is reduced, and the water rocket is safer to use. And because the existence of arrow point through-hole, outside gas also can pass through the arrow point through-hole gets into in the arrow point body, the inside and outside atmospheric pressure of arrow point body keeps the same, more is favorable to after the deformation the arrow point body reconversion.

Of course, in other embodiments, the number and the arrangement position of the through holes are not limited to the above, for example, the through holes may be two, three, and the like, and the through holes may be arranged in the rest of the arrow body.

In a preferred embodiment, the arrow body is an elastic arrow, and more specifically, the arrow body is made of a soft rubber material. The soft rubber has lower cost, soft texture, is safer during use, is easy to deform and is easy to recover after deformation. The soft capsule is harmless and toxic, durable, and suitable for all people. And the soft rubber texture is lighter, so that the overall mass of the water rocket is lower.

More preferably, the arrow head clamping portion is arranged on the inner side face of the arrow head body. More specifically, the arrow point joint portion is cyclic annular, integrated into one piece in the arrow point body is close to on the medial surface of lower tip. The arrow head clamping part protrudes out of the inner side face of the arrow head body. The arrow point clamping part is also made of soft rubber and can deform along with the arrow point body.

In preferred embodiment, the upper end of the arrow body 1 is provided with a clamping groove, the clamping groove is also annular, and the arrow clamping portion can be clamped in the clamping groove, so that the arrow and the arrow body 1 can be detachably connected.

Of course, in other embodiments, the connection manner between the arrow head and the arrow body 1 is not limited to the above, for example, the arrow head clamping portion is disposed on the arrow body 1, the inner side wall of the arrow head body is provided with a clamping groove, and the arrow head clamping portion is clamped in the clamping groove. Or, the arrow head and the arrow body 1 are connected by a fastening piece or an adhesive.

Referring to fig. 3, 4 and 5, the base 2 includes a mounting base 21 and a resilient tail 22. A plurality of clamping portions 214 are sequentially arranged on the outer side surface of the mounting seat 21 and are arranged in a surrounding manner, a plurality of elastic tail wings 22 are arranged, clamping columns 221 are arranged on each elastic tail wing 22, and each clamping column 221 can be clamped on the clamping portions 214 in a one-to-one corresponding manner. The elastic tail wing 22 is detachably connected with the mounting seat 21, the assembly and disassembly are convenient and labor-saving, the elastic tail wing 22 can deform, and when the water rocket ascends, the deformed elastic tail wing 22 can enable the water rocket to rotate and ascend.

In a preferred embodiment, the clamping portions 214 are four, and the adjacent clamping portions 214 are spaced apart by 90 °. The number of the elastic tail wings 22 is also four. Each of the locking portions 214 is locked with one of the elastic tail wings 22. The lower end part of each elastic tail wing 22 is positioned at the same horizontal height, and the lower end part of each elastic tail wing 22 is abutted against the bottom surface, so that the base 2 of the water rocket can be stably placed on the ground.

Of course, in other embodiments, the number of the snap-in portions 214 and the number of the elastic tail wings 22 are not limited to the above, and may be three, five, etc.

In a preferred embodiment, the mounting base 21 is cylindrical, and four engaging portions 214 are formed on an outer side surface thereof. The clamping portion 214 is long and extends along the axial direction of the mounting base 21. The clamping portion 214 is provided with a clamping hole, and the clamping hole extends along the length direction of the clamping portion 214 and penetrates through the clamping portion 214. Still be equipped with an opening on joint portion 214, the opening set up in joint portion 214 is kept away from on the vertical side of mount pad 21, the opening is followed joint portion 214's length direction extends the setting, and run through in joint portion 214. The opening is communicated with the clamping hole 121.

In a preferred embodiment, the upper side surface of the mounting seat 21 is further provided with a first groove 212, the first groove 212 is cylindrical, and an inner side surface of the first groove 212 is provided with an internal thread. The first groove 212 is further provided with a sealing cylinder 213, one end of the sealing cylinder 213 is fixedly arranged on the bottom surface of the first groove 212, and the other end of the sealing cylinder extends towards the direction far away from the ground. The diameter of the sealing cylinder 213 is smaller than that of the first groove 212, the outer side surface of the sealing cylinder 213 is spaced from the inner side surface of the first groove 212, and the internal thread is located between the outer side surface of the sealing cylinder 213 and the inner side surface of the first groove 212. The center of the sealing cylinder 213 is provided with a first through hole 211, and the first through hole 211 extends along the axial direction of the mounting seat 21.

Of course, in other embodiments, the mounting seat 21 may not be provided with the first groove 212 and the sealing cylinder 213, the mounting seat 21 is cylindrical, the center of the mounting seat is provided with the first through hole 211, the upper end of the outer side surface of the mounting seat may be provided with an external thread, the first connecting portion 11 may be provided with an internal thread, and the mounting seat 21 is detachably connected with the first connecting portion 11 through rotation.

In the preferred embodiment, each of the flexible rear wings 22 is formed in a planar shape, and the flexible rear wings 22 uniformly divide air when the water rocket ascends, so that the water rocket can stably fly straight upward. Each elastic tail wing 22 is provided with a clamping column 221 and a clamping plate, and the clamping column 221 and the clamping plate are arranged on the upper end portion of the elastic tail wing 22. One side end of the clamping plate and the elastic tail wing 22 are integrally formed, and the clamping plate is in a long strip shape and consistent in extending direction along the clamping hole. The clip column 221 is mounted on the clip plate, and more specifically, the clip column 221 and the clip plate are integrally formed. The extending direction of the locking post 221 is the same as the extending direction of the locking hole.

During specific installation, the lower end part of the clamping column 221 is firstly inserted into the clamping hole, and meanwhile, the lower end part of the clamping plate is inserted into the upper end part of the opening and then is gradually and completely inserted into the clamping hole and the opening from top to bottom.

In order to stably and correctly arrange the clamping column 221 and the clamping plate in the clamping hole and the opening, a limiting plate is further arranged on the elastic tail wing 22, and the limiting plate is fixedly arranged on the clamping column 221 and the upper end portion of the clamping plate. The limiting plate is clamped with the upper end of the clamping portion 214 in an abutting mode.

More specifically, the elastic rear wing 22 may be deformed, and the deformed elastic rear wing 22 may maintain the deformed shape or may be restored to the original shape by an external force. If each of the elastic tail wings 22 is deformed so that each of the elastic tail wings 22 is not in a planar shape, the deformed elastic tail wing 22 causes the water rocket to ascend along a specific orbit, which may be a straight orbit, an arc orbit, or an orbit having another shape. In general, different shapes of the elastic tail 22 allow the water rocket to fly in different orbits. More importantly, the deformed elastic tail wing 22 can enable the water rocket to rotate and ascend, and the entertainment of the water rocket is improved. And the elastic tail wings 22 have certain hardness, so that the water rocket can be stably placed on the ground.

In a preferred embodiment, the base 2 further includes a gasket, the gasket is located in the first groove 212 and sleeved on the sealing cylinder 213, and the gasket is abutted and fixed with the bottom surface of the first groove 212. The gasket texture is soft, and can take place deformation, can restore to the original state by oneself after the deformation.

Referring to fig. 6 and 7, the sealing device 3 includes a sealing post 31 and a sealing ring 32. The outer side surface of the upper end of the sealing column 31 is provided with a plurality of annular mounting grooves 311 at intervals, the sealing rings 32 are arranged in the annular mounting grooves 311 in a one-to-one correspondence manner, the sealing device 3 can be provided with different numbers of sealing rings 32 on the sealing column 31, the sealing effect is different due to different numbers and different positions of the sealing rings 32, and the sealing device 3 can control the launching height of the water rocket by arranging different numbers of sealing rings 32.

The sealing ring 32 is arranged at the higher position of the sealing column 31, the better the sealing effect is, and the higher the launching height of the water rocket is.

In a preferred embodiment, the number of the annular mounting grooves 311 is three, and the three annular mounting grooves 311 are sequentially arranged along the length direction of the sealing column 31, and adjacent annular mounting grooves 311 are arranged in parallel at intervals. A sealing ring 32 can be arranged in each annular mounting groove 311.

Of course, in other embodiments, the number of the annular mounting grooves 311 is not limited to the above, for example, four or five, etc., and the number of the annular mounting grooves 311 may be changed according to actual requirements.

More preferably, the sealing column 31 is cylindrical, and a limiting plate is further disposed in the middle of the outer side surface of the sealing column, and the horizontal cross section of the limiting plate is circular. The upper end of the sealing column 31 can be inserted into the first through hole 211, and the limiting plate abuts against the lower side surface of the base 2, so that the sealing column 31 is prevented from being excessively inserted into the first through hole 211, and the sealing column 31 cannot be taken out.

More preferably, one or more sealing rings 32 are arranged on the sealing column 31, and the sealing rings 32 are in interference fit with the inner side wall of the first through hole 211. Each of the sealing rings 32 may generate a certain friction force with the inner sidewall of the first through hole 211, and the more the sealing rings 32 are disposed on the sealing column 31, the greater the generated friction force is. Due to the larger friction force, the interior of the arrow body 1 needs to be filled with more air to increase the air pressure inside the arrow body 1, so that the sealing device 3 can be extruded out of the interior of the arrow body 1, and the rising height of the arrow body 1 is increased by the larger air pressure. Therefore, according to actual requirements, the launching height of the water rocket can be controlled by arranging different numbers of sealing rings 32, and the entertainment of the water rocket is increased.

Of course, in other embodiments, the horizontal cross section of the limiting plate may be in other shapes, such as square, triangle, etc.

In a preferred embodiment, the lower end of the sealing column 31 is further provided with a plurality of grooves, specifically two grooves, and the two grooves are symmetrically disposed on two sides of the lower end of the sealing column 31. The groove can increase the friction force when a human hand holds the finger. When the sealing post 31 needs to be inserted into or pulled out of the first through hole 211, a person can directly pinch the two grooves and then insert or pull out the grooves. In order to increase the friction force, a plurality of friction strips are arranged in each groove, and the adjacent friction strips are arranged in parallel at intervals. The friction strips protrude out of the surfaces of the grooves, so that friction force generated when a human hand holds the rubber belt is greatly increased. And the length direction of the rubbing strip and the length direction of the sealing column 31 form an included angle.

More preferably, the sealing device 3 further includes a second connecting portion having an elongated shape, one end of which is integrally formed with the lower end portion of the sealing post 31. And the length direction of the second connecting part and the length direction of the sealing column 31 form an included angle. A first inflation hole is formed in the sealing column 31, and the first inflation hole extends along the length direction of the sealing column 31. And a second inflation hole is formed in the second connecting part and extends along the length direction of the second connecting part. The first inflation hole is communicated with the second inflation hole.

In summary, the interior of the arrow body 1 is continuously inflated by the inflation device 4, and as the air pressure in the arrow body 1 is higher and higher, the pressure for pushing the sealing column 31 out of the arrow body 1 is generated, and when the pressure is greater than the friction force generated by the sealing ring 32 and the inner side wall of the first through hole 211, the sealing column 31 is pressed out of the first through hole 211, so that the arrow body 1 can be lifted. The sealing device 3 may be provided with one or more sealing rings 32 to control the elevation of the water rocket.

Referring to fig. 8 to 16, the inflation line 41 includes a connecting member 412 of a line body 411 and a plug member 413. The number of the pipeline bodies 411 is multiple, and each pipeline body 411 is provided with an inflation hole in a penetrating manner, and the inflation holes extend along the length direction of the pipeline body 411. The connecting member 412 is in a long strip shape and comprises a first portion 4121 and a second portion 4122 which are connected, wherein a first mounting hole is formed in the first portion 4121, and the first mounting hole extends along the length direction of the first portion 4121. The diameter of the first mounting hole is larger than that of the line body 411, one end of the line body 411 can be inserted into the first mounting hole, and the line body 411 and the first mounting hole are connected in an adhesion mode. Of course, in other embodiments, the line body 411 and the first mounting hole may be connected by a snap connection or the like.

More preferably, one end of the second portion 4122 is integrally formed with one end of the first portion 4121. The second portion 4122 is provided with a connecting hole, the connecting hole extends along the length direction of the second portion 4122, and the connecting hole is communicated with the first mounting hole, that is, the connecting hole is communicated with the inflation hole.

More preferably, the diameter of the connecting hole near the first portion 4121 is smaller than the diameter of the connecting hole far from the first portion 4121.

In a preferred embodiment, a plurality of friction strips are further arranged on the outer side surface of the first portion 4121 in a surrounding manner, and adjacent friction strips are arranged in parallel at intervals. The rubbing strip extends in the longitudinal direction of the first portion 4121. The human hand can control the connecting piece 412 by holding and pinching the outer side surface of the first part 4121, and due to the existence of the friction strip, the friction force between the human hand and the first part 4121 is increased, so that the human hand can hold and pinch the connecting piece 412 more conveniently.

More preferably, the plug 413 is shaped as a long bar and includes a third portion 4131 and a plug column 4132. The third portion 4131 is provided with a second mounting hole, a diameter of the second mounting hole is larger than a diameter of the line body 411, one end of the line body 411 may be inserted into the second mounting hole, and the line body 411 and the second mounting hole are connected by bonding. Of course, in other embodiments, the line body 411 and the second mounting hole may be connected by a snap connection or the like.

More preferably, one end of the insertion column 4132 is integrally formed with one end of the third portion 4131, the insertion column 4132 is circular truncated cone-shaped, and a diameter of the end of the insertion column 4132 close to the third portion 4131 is larger than a diameter of the end of the insertion column 4132 far from the third portion 4131. More specifically, the diameter of the connecting hole near the end of the first portion 4121 is smaller than the diameter of the plug-in post 4132 near the end of the third portion 4131, the diameter of the connecting hole far from the end of the first portion 4121 is smaller than the diameter of the plug-in post 4132 near the end of the third portion 4131, and the diameter of the connecting hole far from the end of the first portion 4121 is larger than the diameter of the plug-in post 4132 far from the end of the third portion 4131. That is, the insertion columns 4132 may be inserted into the connection holes and achieve an interference fit connection. The connecting piece 412 with for dismantling the connection between the plug connector 413, easy dismounting.

In a preferred embodiment, a plurality of planes are further disposed on the outer side surface of the third portion 4131, and the number of the planes may be two, and the planes are symmetrically disposed on two sides of the third portion 4131. Each of the flat surfaces extends in the longitudinal direction of the third portion 4131. And each of the planes is provided with a plurality of rubbing strips, the rubbing strips extend along the length direction of the third portion 4131, and the adjacent rubbing strips are arranged in parallel at intervals.

Of course, in other embodiments, the outer side surface of the third portion 4131 may not be provided with the flat surface, and the rubbing strip may be directly disposed on the outer side surface of the third portion 4131 at intervals; the first portion 4121 may be provided with a plurality of flat surfaces on which the rubbing strips are correspondingly disposed.

In summary, the insertion column 4132 is detachably connected to the connection hole, and interference fit is achieved, wherein one end of one of the line bodies 411 is connected to the first mounting hole, one end of the other line body 411 is connected to the second mounting hole, and the two line bodies 411 are communicated with each other. Two shorter said line bodies 411 can be combined into one longer said line body 411 by means of said connection 412 and plug 413. Of course, three, four or more line bodies 411 may also be provided, two ends of each line body 411 are respectively provided with one connecting piece 412 and one plug piece 413, and the three or more line bodies 411 are detachably connected and combined into one longer line body 411. The line body 411 can be used on a water rocket which can spray water when rising, and the longer line body 411 can be used to ensure that the distance between a user and the water rocket is longer, so that the user can be protected from the threat of rain. And the water rocket is easy to smash a user when falling, and the long pipeline body 411 can also avoid the situation. And the connector 412 and the plug piece 413 are in interference fit, so that gas cannot escape in the inflation process, and the use is more convenient for users.

In a preferred embodiment, the inflator 42 includes a cylinder 421, a cylinder cover 422 and a cylinder seat 423, the cylinder 421 is hollow, and has two open ends, and the cylinder cover 422 is fixedly connected to the upper end of the cylinder 421. The upper end of the cylinder seat 423 is provided with a first installation wall and a second installation wall, the diameter of the first installation wall is smaller than that of the second installation wall, the first installation wall and the second installation wall are concentric and are arranged at intervals, and the lower end of the cylinder seat 423 is clamped between the first installation wall and the second installation wall.

More preferably, the inflator 42 further includes a handle 424, a connecting rod 425 and a piston 426, and the handle 424 is disposed on an upper end of the connecting rod 425 and is located on an upper side of the cylinder 421. The middle part of the connecting rod 425 penetrates through the cylinder cover 422 and can move up and down. The piston 426 is disposed on the lower end of the connecting rod 425, is located in the cylinder 421, and is movable up and down in the cylinder 421.

The piston 426 is further provided with a sealing ring, and the sealing ring is grounded with the inner side surface of the cylinder 421. The sealing ring can prevent gas from escaping towards the upper side during inflating, and the inflating efficiency is improved.

More preferably, the cylinder block 423 is provided with an air pillar 427, the air pillar 427 is in a long strip shape, and an upper end of the air pillar 427 extends into the cylinder 421 and is located below the piston 426. The upper end of the vent column 427 is further provided with a second through hole 4271, and the second through hole 4271 extends along the length direction of the vent column 427. The lower end of the vent column 427 is provided with a second groove 4272, and the second groove 4272 is communicated with the second through hole 4271.

In a preferred embodiment, the inflator 42 further comprises a ball 428 and an adapter 429, the ball 428 has a diameter smaller than the diameter of the second groove 4272, and the ball 428 has a diameter larger than the diameter of the second through hole 4271. That is, the ball 428 can move in the second groove 4272 and does not flow out of the second groove 4272 through the second through hole 4271. The diameter of the upper end of the adapter 429 is smaller than the diameter of the second groove 4272, so the upper end of the adapter 429 can be inserted into the second groove 4272. The length of the upper end of the adapter 429 is smaller than that of the second groove 4272, and the ball 428 is located between the upper end of the adapter 429 and the second through hole 4271 and can move up and down.

More preferably, the upper end of the adaptor 429 is further provided with a third through hole 4291 and a notch 4292, and the diameter of the third through hole 4291 is smaller than the diameter of the ball 428, that is, the ball 428 does not flow out of the second groove 4272 through the third through hole 4291. The upper end of adapter 429 still runs through and is equipped with a plurality of breachs 4292, breach 4292 symmetry set up in the both sides of the upper end of adapter 429, and all with third through hole 4291 intercommunication sets up. The lower end of the adaptor 429 may be in communication with the manifold body 411.

In specific implementation, a user pinches the handle 424 to push the handle 424 to move downward, the handle 424 drives the connecting rod 425 and the piston 426 to move downward together, air in the cylinder 421 is pressed downward by the piston 426 and flows into the second groove 4272 through the second through hole 4271, at this time, due to the action of air pressure from top to bottom, the ball 428 is pressed on the upper end portion of the adapter 429, but due to the existence of the gap 4292, air can flow into the third through hole 4291 through the gap 4292, and then flows into the arrow body 1 through the adapter 429, the inflation line 41 and the sealing device 3.

When one inflation is finished, a person can pinch the handle 424 and drive the connecting rod 425 and the piston 426 to move upwards together, and due to the fact that the air pressure in the arrow body 1 is high, the air in the arrow body 1 flows back to the second groove 4272 along the sealing device 3, the inflation pipeline 41 and the adaptor 429. Due to the fact that the air pressure in the arrow body 1 is high, the ball 428 is blown upwards and blocks the second through hole 4271, and therefore air cannot flow into the cylinder 421 through the second through hole 4271, and therefore the effect of preventing air from flowing backwards is achieved, and the effect of preventing air from flowing backwards is good.

The water rocket comprises a base 2, wherein the base 2 comprises the elastic tail wing 22, and the elastic tail wing 22 can deform so that the water rocket flies according to a preset orbit; the water rocket further comprises a sealing device 3, the sealing device 3 further comprises sealing columns 31 and sealing rings 32, and the rising height of the water rocket can be changed by changing the number and the positions of the sealing rings 32 on the sealing columns 31; the water rocket further comprises an inflation device 4, wherein the inflation device 4 comprises an inflation pipeline 41 and an inflator 42, the inflation pipeline 41 comprises a pipeline body 411, a connecting piece 412 and a connector piece 413, and the connecting piece 412 and the connector piece 413 can connect a plurality of short pipeline bodies 411 into one long inflation pipeline 41; the inside of the inflator 42 is provided with the ball 428 for preventing the gas from flowing backward. The water rocket is convenient to use, has multiple functions, and has better practicability, science and technology and entertainment.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (9)

1. A water rocket, comprising:

an arrow body (1) which is hollow and has a first connecting part (11) formed on the lower end part;

the base (2) comprises a mounting seat (21) and a plurality of elastic tail wings (22) detachably connected to the mounting seat (21), a first through hole (211) is formed in the mounting seat (21), and the mounting seat (21) is detachably connected to the first connecting portion (11);

the sealing device (3) comprises a sealing column (31) and a sealing ring (32) arranged at the upper end part of the sealing column (31), and the upper end part of the sealing column (31) is inserted into the first through hole (211);

a plurality of annular mounting grooves (311) are formed in the outer side surface of the upper end of the sealing column (31), one or more sealing rings (32) are arranged in the annular mounting grooves (311) in a one-to-one correspondence manner, and the sealing rings (32) are in interference fit with the inner wall of the first through hole (211);

the inflation device (4) comprises an inflation pipeline (41) and an inflator pump (42), one end of the inflation pipeline (41) is connected with the inflator pump (42), and the other end of the inflation pipeline is connected with the sealing device (3).

2. The water rocket of claim 1, wherein the mounting seat (21) further comprises a first groove (212) formed on an upper side surface thereof, the mounting seat (21) further comprises a sealing cylinder (213) disposed in the first groove (212), the first through hole (211) is disposed in the sealing cylinder (213), the sealing cylinder (213) is inserted into the first connecting portion (11), and the first connecting portion (11) is detachably connected to the first groove (212).

3. The water rocket of claim 1, wherein a plurality of clamping portions (214) are sequentially arranged and arranged on the outer side surface of the mounting seat (21) in a surrounding manner, clamping columns (221) are arranged at one end of each elastic tail wing (22), and the clamping columns (221) are correspondingly clamped in the clamping portions (214) one by one.

4. The water rocket of claim 1, wherein the inflation pipeline (41) comprises a pipeline body (411), a connecting member (412) and a plug connector (413), the connecting member (412) comprises a first portion (4121) and a second portion (4122) which are connected, the first portion (4121) is connected with one of the pipeline bodies (411), a connecting hole is formed in the second portion (4122), the plug connector (413) comprises a third portion (4131) and a plug-in post (4132) which are connected, the third portion (4131) is connected with the other pipeline body (411), and the plug-in post (4132) is inserted and fixed in the connecting hole.

5. The water rocket of claim 4, wherein the inflator (42) comprises a barrel (421), a barrel cover (422) and a barrel seat (423), the barrel (421) is hollow, the barrel cover (422) is covered on the upper end of the barrel (421), and the lower end of the barrel (421) is fixedly connected with the barrel seat (423).

6. A water rocket according to claim 5, wherein said inflator (42) further comprises a handle (424), a connecting rod (425) and a piston (426), a middle portion of said connecting rod (425) is movably disposed in said barrel cover (422), said handle (424) is disposed at an upper end portion of said connecting rod (425) and is located at an upper side of said barrel (421), and said piston (426) is disposed at a lower end portion of said connecting rod (425) and is movable up and down in said barrel (421).

7. The water rocket of claim 6, wherein the barrel seat (423) is provided with a vent post (427), the upper end of the vent post (427) extends into the barrel (421) and is located at the lower side of the piston (426), and the upper end of the vent post (427) is further provided with a second through hole (4271); the lower end of the ventilation column (427) is provided with a second groove (4272), and the second groove (4272) is communicated with the second through hole (4271).

8. A water rocket according to claim 7, wherein said inflator (42) further comprises a ball (428) disposed within said second groove (4272), said ball (428) having a diameter greater than a diameter of said second through hole (4271); the inflator pump (42) further comprises an adapter (429), the lower end of the adapter (429) is connected with the pipeline body (411), the upper end of the adapter (429) is inserted into the second groove (4272), and the ball (428) is located between the second through hole (4271) and the upper end of the adapter (429).

9. A water rocket according to claim 8, wherein the upper end of said adapter (429) is further provided with a third through hole (4291) and a gap (4292), the diameter of said third through hole (4291) is smaller than the diameter of said ball (428); the notch (4292) penetrates through the side face of the adapter piece (429) and is communicated with the third through hole (4291).

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