A telescopic nozzle and a liquid spraying device

Abstract

The present invention relates to the technical field of liquid spraying devices, and particularly relates to a telescopic nozzle and a liquid spraying device. The telescopic nozzle includes: an inner spray pipe, which is axially penetrated with spray holes formed therein; an outer nozzle sleeve, which is penetrated internally and is adapted to be sleeved outside the inner spray pipe, and one end of the outer nozzle sleeve in the penetration direction is formed with a telescopic hole; the inner spray pipe is axially movably arranged inside the outer nozzle sleeve, and in the contracted state, the spray pipe head of the inner spray pipe axially contracts inside the telescopic hole of the outer nozzle sleeve. For the telescopic nozzle provided by the present invention, in the contracted state, the spray pipe head of the inner spray pipe contracts inside the telescopic hole of the outer nozzle sleeve, so that after the inner spray pipe stops spraying, the liquid medium remaining at the spray pipe head can drip inside the outer nozzle sleeve during the dripping process, avoiding the uncontrolled free dripping of the remaining liquid and reducing the trouble brought to the user by the free dripping of the remaining liquid.

Description

Technical Field

[0001] The invention relates to the technical field of liquid spraying devices, and in particular to a telescopic nozzle and a liquid spraying device. Background Art

[0002] Liquid spray devices are daily necessities that are often used in daily life. However, for some devices that use nozzles for spraying, they often encounter such a problem: when the spraying is finished, some liquid still flows out of the nozzle and drips to the ground in the form of water droplets or flows along the outer surface of the device in the form of a thin stream. This situation of residual liquid dripping brings certain troubles to the user. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the nozzle structure in the prior art that the residual liquid is easy to drip, thereby providing a telescopic nozzle capable of collecting the residual liquid.

[0004] Another technical problem to be solved by the present invention is to overcome the defect in the prior art that the residual liquid in the nozzle part of the liquid spraying device is easy to drip, thereby providing a liquid spraying device for collecting the residual liquid.

[0005] In order to solve the above technical problems, the present invention provides a telescopic nozzle, comprising:

[0006] The inner layer nozzle has a nozzle hole formed therein through the inner portion along the axial direction;

[0007] An outer nozzle sleeve, the interior of which penetrates and is suitable for sleeve-fitting on the outer side of the inner nozzle, and a telescopic hole is formed at one end of the outer nozzle sleeve along the penetration direction;

[0008] The inner layer nozzle is movably arranged in the outer layer nozzle sleeve along the axial direction. In the contracted state, the nozzle head of the inner layer nozzle is contracted in the telescopic hole of the outer layer nozzle sleeve along the axial direction.

[0009] Furthermore, a liquid collecting portion is provided on one side of the outer nozzle sleeve close to the telescopic hole. In the contracted state, the liquid collecting portion is suitable for being arranged at the lower part of the nozzle head along the gravity direction.

[0010] Furthermore, the outer nozzle sleeve further comprises a reflux hole, which penetrates through the outer nozzle sleeve and is in communication with the outside, and is suitable for being in communication with the inside of the liquid collecting part.

[0011] Furthermore, along the direction from the telescopic hole to the reflux hole, the inner diameter of the liquid collecting portion gradually increases.

[0012] Furthermore, the outer nozzle sleeve is penetrated with a first pressure relief hole along the radial direction, and the inner nozzle is penetrated with a second pressure relief hole along the radial direction; the second pressure relief hole moves with the movement of the inner nozzle, and is connected with the first pressure relief hole in a contracted state.

[0013] Furthermore, it also includes:

[0014] The liquid collecting box has a liquid collecting cavity formed therein, and the liquid collecting cavity is at least partially communicated with the reflux hole.

[0015] Furthermore, the liquid collecting chamber is communicated with the first pressure relief hole.

[0016] Furthermore, in the contracted state, a conducting loop is formed inside the telescopic nozzle via the spray hole, the liquid collecting portion, the reflux hole, the liquid collecting cavity, the first pressure relief hole and the second pressure relief hole.

[0017] Furthermore, in the extended state, the nozzle head of the inner nozzle extends out of the telescopic hole of the outer nozzle sleeve.

[0018] Furthermore, a recovery hole is provided at the bottom of the liquid collecting box, and the recovery hole is communicated with the liquid collecting cavity.

[0019] Furthermore, an anti-mock portion is provided on one of the inner layer nozzle pipe and the outer layer nozzle sleeve, and a slide groove is correspondingly provided on the other; the anti-mock portion cooperates with the slide groove to ensure that the first pressure relief hole and the second pressure relief hole are connected in a contracted state.

[0020] The liquid spraying device provided by the present invention comprises: the telescopic nozzle as described above.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. The telescopic nozzle provided by the present invention is configured so that the inner nozzle pipe and the outer nozzle sleeve are movably matched, and in the retracted state, the nozzle head of the inner nozzle pipe is retracted inside the telescopic hole of the outer nozzle sleeve, so that after the inner nozzle pipe stops spraying, the liquid medium remaining at the nozzle head can drip into the outer nozzle sleeve during the dripping process, thereby avoiding the uncontrolled free dripping of the residual liquid and reducing the trouble caused to the user by the free dripping of the residual liquid.

[0023] 2. The telescopic nozzle provided by the present invention, by arranging a liquid collecting portion at the lower part of the nozzle head along the gravity direction, can collect and guide the residual liquid dripping from the nozzle head through the liquid collecting portion in the contracted state, thereby preventing the dripping residual liquid from flowing freely in the outer nozzle sleeve and preventing it from flowing out to the outside of the telescopic nozzle again.

[0024] 3. The telescopic nozzle provided by the present invention, by arranging a reflux hole on the outer nozzle sleeve and making the reflux hole communicate with the liquid collecting part, can guide the residual liquid collected by the liquid collecting part to the reflux hole, thereby facilitating the collection of the residual liquid at the reflux hole.

[0025] 4. The telescopic nozzle provided by the present invention has an inner diameter of the liquid collecting portion that gradually increases along the telescopic hole toward the reflux hole, thereby facilitating the liquid located at the telescopic hole at the end of the outer nozzle sleeve to be guided toward the interior of the outer nozzle sleeve, and the excess liquid dripping into the outer nozzle sleeve is gathered to facilitate guiding and collection.

[0026] 5. The telescopic nozzle provided by the present invention can make the liquid medium flow out from the connecting channel between the second pressure relief hole and the first pressure relief hole by respectively arranging the first pressure relief hole on the outer nozzle sleeve and the inner nozzle, and make the second pressure relief hole communicate with the first pressure relief hole in the contracted state, so as to realize diversion, thereby reducing the flow rate of the liquid medium flowing out from the nozzle head; and because the liquid medium flows out from the connecting channel between the second pressure relief hole and the first pressure relief hole, the pressure in the nozzle hole is reduced, thereby reducing the pressure of the liquid medium flowing out from the nozzle head and shortening the spraying distance, thereby facilitating the liquid collecting part to collect the liquid medium flowing out from the nozzle head, thereby avoiding a large amount of liquid medium flowing out from the nozzle head after the spraying is completed.

[0027] 6. The telescopic nozzle provided by the present invention is provided with a liquid collecting box on the telescopic nozzle, and the liquid collecting chamber is connected with the reflux hole and / or the first pressure relief hole, so as to facilitate the collection of the residual liquid flowing out of the reflux hole and / or the first pressure relief hole.

[0028] 7. The telescopic nozzle provided by the present invention has anti-misalignment parts arranged in the slide groove corresponding to the inner nozzle pipe and the outer nozzle sleeve, thereby ensuring that the inner nozzle pipe and the outer nozzle sleeve do not rotate relative to each other to avoid misalignment, thereby ensuring that when the inner nozzle is retracted, the first pressure relief hole and the second pressure relief hole can be aligned to avoid relative rotation and misalignment.

[0029] 8. The liquid spraying device provided by the present invention is provided with a telescopic nozzle, so that the liquid spraying device can collect the residual liquid after the liquid spraying is completed, thereby avoiding the uncontrolled free dripping of the residual liquid and reducing the trouble caused to the user by the free dripping of the residual liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the extended state of the telescopic nozzle of the present invention;

[0032] Figure 2 It is a schematic diagram of the disassembled state of the telescopic nozzle of the present invention;

[0033] Figure 3 It is a schematic diagram of the retracted state of the telescopic nozzle of the present invention;

[0034] Figure 4 is a cross-sectional view of the telescopic nozzle of the present invention in an extended state;

[0035] Figure 5 is a cross-sectional view of the telescopic nozzle of the present invention in a contracted state;

[0036] Figure 6 It is a liquid flow diagram of the telescopic nozzle of the present invention in the extended state;

[0037] Figure 7 It is a liquid flow diagram of the retracted state of the telescopic nozzle of the present invention;

[0038] Figure 8 It is a schematic diagram of the fool-proof structure of the telescopic nozzle of the present invention.

[0039] Description of reference numerals:

[0040] 10-outer nozzle sleeve, 11-return hole, 12-first pressure relief hole, 13-expansion hole, 14-liquid collecting part, 15-chute;

[0041] 20 - inner layer nozzle, 21 - second pressure relief hole, 22 - nozzle head, 23 - spray hole, 24 - foolproof part; 30 - liquid collecting box, 31 - recovery hole, 32 - liquid collecting chamber. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] Embodiment 1

[0047] Combination Figure 1-Figure 8 As shown, the telescopic nozzle provided in this embodiment includes:

[0048] The inner layer nozzle 20 has a nozzle hole 23 formed therein through the inner portion along the axial direction;

[0049] The outer nozzle sleeve 10 penetrates inside and is suitable for sleeve-fitting on the outer side of the inner nozzle 20. A telescopic hole 13 is formed at one end of the outer nozzle sleeve 10 along the penetration direction;

[0050] The inner layer nozzle 20 is movably disposed in the outer layer nozzle sleeve 10 along the axial direction. In the contracted state, the nozzle head 22 of the inner layer nozzle 20 is contracted in the telescopic hole 13 of the outer layer nozzle sleeve 10 along the axial direction.

[0051] Preferably, a spray hole 23 is formed in the middle position of the inner layer nozzle 20 along the axial direction, and the spray hole 23 runs through the inner layer nozzle 20, and the spray hole 23 is suitable for the flow of liquid medium; preferably, in this embodiment, the inner layer nozzle 20 is constructed as a cylindrical rotating body, and the spray hole 23 is constructed as an elongated hole opened along the rotating axis.

[0052] Preferably, in this embodiment, the outer layer nozzle sleeve 10 is constructed as a rotating body, and the outer layer nozzle sleeve 10 is also penetrated in the axial direction. Preferably, the inner diameter of at least part of the outer layer nozzle sleeve 10 is consistent with the outer diameter of the inner layer nozzle 20; the outer layer nozzle sleeve 10 is sleeved on the outside of the inner layer nozzle 20, and the inner layer nozzle 20 can move in the outer layer nozzle sleeve 10 in the axial direction; a telescopic hole 13 is formed at one end of the outer layer nozzle sleeve 10 along the penetration direction, and in the retracted state, the nozzle head 22 of the inner layer nozzle 20 is retracted in the axial direction inside the telescopic hole 13 of the outer layer nozzle sleeve 10; and in the extended state, the nozzle head 22 of the inner layer nozzle 20 extends out of the telescopic hole 13 of the outer layer nozzle sleeve 10.

[0053] Since the inner layer nozzle 20 is provided with a spray hole 23, in the extended state, the spray hole 23 sprays the liquid medium; in the retracted state, the spray hole 23 stops spraying the liquid medium, but when the spraying state is turned into the stopped spraying state, part of the liquid medium will still flow out of the spray hole 23. If no measures are taken, the remaining liquid medium will drip to the ground in the form of water droplets or flow along the outer surface of the device in the form of a thin stream; and the telescopic nozzle provided in this embodiment, in the retracted state, the nozzle head 22 of the inner layer nozzle 20 is retracted inside the telescopic hole 13 of the outer layer nozzle sleeve 10. At this time, the remaining liquid medium will first drip into the outer layer nozzle sleeve 10 during the dripping process, and will not directly drip from the nozzle head 22 of the inner layer nozzle 20 to the ground, thereby avoiding the occurrence of uncontrolled free dripping of residual liquid.

[0054] Preferably, the liquid medium may be water, disinfectant, etc. When the liquid medium is disinfectant, since the disinfectant is corrosive, the residual liquid of the disinfectant is collected by the telescopic nozzle provided in this embodiment, thereby reducing the risk of the user contacting the disinfectant and corroding the skin after the spraying is completed.

[0055] Preferably, the inner diameter of at least a portion of the outer nozzle sleeve 10 is connected to the outer diameter of the inner nozzle pipe 20 in the form of a transition fit.

[0056] The telescopic nozzle provided in the present embodiment is arranged by movably cooperating the inner layer nozzle pipe 20 with the outer layer nozzle sleeve 10, and in the contracted state, the nozzle head 22 of the inner layer nozzle pipe 20 is contracted inside the telescopic hole 13 of the outer layer nozzle sleeve 10, so that after the inner layer nozzle pipe 20 stops spraying, the liquid medium remaining at the nozzle head 22 can drip into the outer layer nozzle sleeve 10 during the dripping process, thereby avoiding the uncontrolled free dripping of the residual liquid and reducing the trouble caused to the user by the free dripping of the residual liquid.

[0057] Preferably, the inner layer nozzle 20 and the outer layer nozzle sleeve 10 are movably matched, specifically, the inner layer nozzle 20 slides along the inner wall of the outer layer nozzle sleeve. In this embodiment, the timing of the inner layer nozzle 20 sliding into the outer layer nozzle sleeve 10 is preferably controlled by the handle for controlling the liquid spraying, so as to ensure that when liquid spraying is required, the inner layer nozzle 20 is in an extended state and the outer layer nozzle sleeve 10 does not interfere with the liquid spraying effect; and to ensure that when liquid spraying is finished, the inner layer nozzle 20 can be retracted into the outer layer nozzle sleeve 10 in time to avoid the occurrence of residual liquid dripping. Preferably, the sliding can be achieved by a linkage structure connected to the inner layer nozzle 20, or by an electric structure, which will not be described in detail here.

[0058] In this example, the inner nozzle and the outer nozzle sleeve are both cylindrical. As a variation, the inner nozzle and the outer nozzle sleeve can also be other matching shapes, as long as the inner nozzle can slide along the inner wall of the outer nozzle sleeve.

[0059] Specifically, a liquid collecting portion 14 is further provided on a side of the outer nozzle sleeve 10 close to the telescopic hole 13 . In the contracted state, the liquid collecting portion 14 is suitable for being arranged at the lower part of the nozzle head 22 along the gravity direction.

[0060] The liquid collecting portion 14 is adapted to at least partially receive the residual liquid dripping from the spray hole 23 .

[0061] Preferably, the liquid collecting portion 14 extends from the end of the telescopic hole 13 to the inside of the side away from the telescopic hole 13, and in the process of the liquid collecting portion 14 extending from the end of the telescopic hole 13, the inner diameter of the outer nozzle sleeve 10 gradually increases, thereby ensuring that the liquid collecting portion 14 guides the remaining liquid to the inside of the outer nozzle sleeve 10.

[0062] Preferably, the inner diameter of the outer nozzle sleeve 10 at the telescopic hole 13 is equal to the outer diameter of the inner nozzle 20 .

[0063] The telescopic nozzle provided in this embodiment provides a liquid collecting portion 14 at the lower part of the nozzle head 22 along the gravity direction. In the retracted state, the residual liquid dripping from the nozzle head 22 can be collected and guided by the liquid collecting portion 14, thereby preventing the dripping residual liquid from flowing freely in the outer nozzle sleeve 10 and flowing out to the outside of the telescopic nozzle again.

[0064] Specifically, the outer nozzle sleeve 10 further includes a reflow hole 11 , which penetrates the outer nozzle sleeve 10 and is in communication with the outside, and is suitable for being in communication with the inside of the liquid collecting portion 14 .

[0065] The telescopic nozzle provided in this embodiment is configured with a reflux hole 11 on the outer nozzle sleeve 10, and the reflux hole 11 is connected to the liquid collecting portion 14, so that the residual liquid collected by the liquid collecting portion 14 can be guided to the reflux hole 11, thereby facilitating the collection of the residual liquid at the reflux hole 11.

[0066] Specifically, along the direction from the telescopic hole 13 to the reflux hole 11 , the inner diameter of the liquid collecting portion 14 gradually increases, so that the liquid collecting portion 14 is inclined from the telescopic hole 13 to the reflux hole 11 .

[0067] The telescopic nozzle provided in this embodiment has an inner diameter of the liquid collecting portion 14 gradually increasing along the telescopic hole 13 toward the reflux hole 11. Figure 4 As shown, the inner diameter of the left end of the liquid collecting portion 14 is smaller than the inner diameter of the right end thereof, so that the liquid located at the telescopic hole 13 at the end of the outer nozzle sleeve 10 is conveniently guided to the inside of the outer nozzle sleeve 10, and the remaining liquid dripping into the outer nozzle sleeve 10 is gathered to facilitate guiding and collection.

[0068] In this embodiment, in the contracted state, the water supply operation to the inner layer nozzle 20 can be stopped, and the water inside the inner layer nozzle 20 will enter the liquid collecting part 14 for collection. Further, when the water supply operation to the inner layer nozzle 20 is stopped, the flow rate of the water flow will gradually decrease, and some water will continue to flow out of the inner layer nozzle 20. In order to avoid excessive water pressure, which causes the water flow to spray out of the end of the telescopic hole 13, in this embodiment, the outer layer nozzle sleeve 10 is formed with a first pressure relief hole 12 in the radial direction, and the inner layer nozzle 20 is formed with a second pressure relief hole 21 in the radial direction; the second pressure relief hole 21 moves with the movement of the inner layer nozzle 20, and is connected with the first pressure relief hole 12 in the contracted state.

[0069] In the retracted state, the second pressure relief hole 21 is connected to the first pressure relief hole 12; in the extended state, the second pressure relief hole 21 is offset from the first pressure relief hole 12, and since the outer diameter of the inner nozzle 20 is the same as the inner diameter of the outer nozzle sleeve 10, the second pressure relief hole 21 and the first pressure relief hole 12 are not connected to each other in the offset state.

[0070] Preferably, when the second pressure relief hole 21 is blocked, the hydraulic pressure in the inner nozzle cavity is high, and the liquid medium can be sprayed out from the nozzle head 22. When the second pressure relief hole 21 is not blocked, the spray liquid flows away through the second pressure relief hole 21, the hydraulic pressure in the cavity is low, and the liquid medium will not be sprayed.

[0071] When liquid spraying is required, the inner nozzle 20 extends to the specified position. At this time, the second pressure relief hole 21 is misaligned with the first pressure relief hole 12, and the second pressure relief hole 21 is completely blocked. The liquid medium moves along the spray hole 23 and cannot flow out from the second pressure relief hole 21. At the end of liquid spraying, the inner nozzle 20 is gradually retracted. During the retraction process, the liquid pressure in the spray hole 23 is higher than the external pressure, and the liquid medium in the spray hole 23 still has a tendency to flow out from the nozzle head 22. Until the second pressure relief hole 21 is aligned with the first pressure relief hole 12 to achieve conduction between the two, the liquid medium flows out from the second pressure relief hole 2 1 and the first pressure relief hole 12 to realize flow diversion, thereby reducing the flow rate of the liquid medium flowing out of the nozzle head 22; and because the liquid medium flows out of the second pressure relief hole 21 and the first pressure relief hole 12, the pressure in the spray hole 23 is reduced, thereby reducing the pressure of the liquid medium flowing out of the nozzle head 22, and shortening the spraying distance, so that it is convenient for the liquid collecting part 14 to collect the liquid medium flowing out of the nozzle head 22, ensuring the collection effect of the liquid collecting part 14 on the residual liquid, and avoiding a large amount of liquid medium flowing out of the nozzle head 22 after the spraying is completed.

[0072] The telescopic nozzle provided in the present embodiment can make the liquid medium flow out from the connecting channel between the second pressure relief hole 21 and the first pressure relief hole 12, thereby realizing diversion and reducing the flow rate of the liquid medium flowing out from the nozzle head 22. Moreover, since the liquid medium flows out from the connecting channel between the second pressure relief hole 21 and the first pressure relief hole 12, the pressure in the spray hole 23 is reduced, thereby reducing the pressure of the liquid medium flowing out from the nozzle head 22 and shortening the spraying distance, thereby facilitating the liquid collecting part 14 to collect the liquid medium flowing out from the nozzle head 22 and avoiding a large amount of liquid medium flowing out from the nozzle head 22 after the spraying is completed.

[0073] Preferably, the timing of retracting the inner layer nozzle should be advanced to a certain extent, so as to ensure that most of the spray liquid can still be sprayed out from the nozzle during the retraction process of the inner layer nozzle.

[0074] Preferably, in the extended state, the inner layer nozzle 20 is extended to ensure that the inner layer nozzle 20 can be exposed outside the outer layer nozzle sleeve 10, and the second pressure relief hole 21 and the first pressure relief hole 12 should be completely misaligned, and the inner wall of the outer layer nozzle sleeve 10 completely blocks the pressure relief hole of the inner layer nozzle 20 to ensure good airtightness. In the retracted state, the inner layer nozzle 20 is retracted to ensure that the inner layer nozzle 20 can be inside the outer layer nozzle sleeve 10, and the second pressure relief hole 21 and the first pressure relief hole 12 are aligned and connected, and at the same time, ensure that the other contact surfaces outside the conduction channel of the second pressure relief hole 21 and the first pressure relief hole 12 are still in a sealed state to prevent the liquid medium from leaking from the gap.

[0075] Specifically, the telescopic nozzle also includes:

[0076] The liquid collecting box 30 has a liquid collecting chamber 32 formed therein, and the liquid collecting chamber 32 is at least partially communicated with the reflux hole 11 .

[0077] Specifically, the liquid collecting chamber 32 is communicated with the first pressure relief hole 12 .

[0078] Preferably, the liquid collecting box 30 is constructed as a box-shaped structure, which is fixedly connected to the outer nozzle sleeve 10, and the specific connection method can be a snap connection, a pull-type connection or an integral molding, etc.

[0079] The telescopic nozzle provided in this embodiment is provided with a liquid collecting box 30 on the telescopic nozzle, and the liquid collecting chamber 32 is connected with the reflux hole 11 and / or the first pressure relief hole 12, so as to facilitate the collection of the residual liquid flowing out of the reflux hole 11 and / or the first pressure relief hole 12.

[0080] Preferably, the liquid collecting box is installed below the outer nozzle sleeve, and correspondingly, the reflux hole and the first pressure relief hole 12 are also arranged above the inner cavity of the liquid collecting box, so as to facilitate conduction and collection of residual liquid under the action of gravity.

[0081] In the specific use process, combined with Figure 6 As shown, when liquid spraying is required, the inner layer nozzle extends from the outer layer nozzle sleeve, the second pressure relief hole 21 is offset from the first pressure relief hole 12, the inner wall at the rear end of the outer layer nozzle sleeve can block the second pressure relief hole 21, and the hydraulic pressure in the inner layer nozzle cavity is relatively high, so that the liquid medium can be sprayed out;

[0082] Combination Figure 7As shown, when the spraying is finished, the inner nozzle is retracted into the outer nozzle sleeve. At this time, the second pressure relief hole 21 is connected with the first pressure relief hole 12 to relieve the hydraulic pressure in the inner nozzle cavity. A part of the residual liquid enters the liquid collecting box through the connected second pressure relief hole 21 and the first pressure relief hole 12; the other part of the residual liquid flows out from the nozzle head 22 of the inner nozzle. Since the inner nozzle is in the outer nozzle sleeve at this time, this part of the residual liquid will be blocked by the liquid collecting part 14 of the outer nozzle sleeve, and flow along the guiding slope of the liquid collecting part 14, and finally enter the liquid collecting box through the reflux hole 11, and be temporarily stored in the liquid collecting cavity.

[0083] Preferably, in this example, the number of the first pressure relief hole 12 and the second pressure relief hole 21 is one. As a variation, the number of the first pressure relief hole 12 and the second pressure relief hole 21 may also be multiple.

[0084] Specifically, in the contracted state, a conductive loop is formed inside the telescopic nozzle via the spray hole 23 , the liquid collecting portion 14 , the reflux hole 11 , the liquid collecting cavity 32 , the first pressure relief hole 12 and the second pressure relief hole 21 .

[0085] Specifically, in the extended state, the nozzle head 22 of the inner nozzle 20 extends out of the telescopic hole 13 of the outer nozzle sleeve 10 .

[0086] Specifically, a recovery hole 31 is further provided at the bottom of the liquid collecting box 30 , and the recovery hole 31 is communicated with the liquid collecting chamber 32 .

[0087] The recovery hole 31 arranged at the bottom of the liquid collecting box 30 is suitable for recovering the residual liquid. As a variation, the recovery hole 31 can also be connected to the liquid holding chamber, so as to facilitate the direct introduction of the residual liquid into the liquid holding chamber, so as to recycle the residual liquid and avoid the need to repeatedly dump the residual liquid when there is a lot of residual liquid in the liquid collecting box 30.

[0088] Specifically, combined Figure 8 As shown, one of the inner layer nozzle 20 and the outer layer nozzle sleeve 10 is provided with an anti-mumble portion 24, and the other is correspondingly provided with a slide groove 15; the anti-mumble portion 24 cooperates with the slide groove 15 to ensure that the first pressure relief hole 12 and the second pressure relief hole 21 are connected in the contracted state.

[0089] The telescopic nozzle provided in this embodiment has anti-mute portions 24 arranged on the slide groove 15 corresponding to the inner nozzle pipe 20 and the outer nozzle sleeve 10, thereby ensuring that the inner nozzle pipe 20 and the outer nozzle sleeve 10 do not rotate relative to each other to avoid misalignment, thereby ensuring that when the inner nozzle is retracted, the first pressure relief hole 12 and the second pressure relief hole 21 can be aligned to avoid relative rotation and misalignment.

[0090] As a variation, a sealing ring is further provided between the inner nozzle pipe 20 and the outer nozzle sleeve 10, and the sealing ring is suitable for improving the sealing between the inner nozzle pipe 20 and the outer nozzle sleeve 10 to prevent the liquid in the spray hole 23 from flowing from the second pressure relief hole 21 into the gap between the inner nozzle pipe 20 and the outer nozzle sleeve 10 in the extended state, and at the same time avoid the pressure loss in the spray hole 23 to ensure that the spraying effect is not affected.

[0091] Embodiment 2

[0092] This embodiment provides a liquid spraying device, including: the telescopic nozzle as described in the above-mentioned embodiment 1.

[0093] The liquid spraying device provided in this embodiment is provided with a telescopic nozzle so that the liquid spraying device can collect the residual liquid after the liquid spraying is completed, thereby preventing the residual liquid from dripping uncontrollably and reducing the trouble caused to the user by the free dripping of the residual liquid.

[0094] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A telescopic nozzle, characterized in that, it includes: an inner nozzle tube (20) with a spray hole (23) formed through it axially; an outer nozzle sleeve (10) with a through hole inside and adapted to be sleeved outside the inner nozzle tube (20), and one end of the outer nozzle sleeve (10) in the through direction is formed with a telescopic hole (13); the inner nozzle tube (20) is axially movably arranged inside the outer nozzle sleeve (10), and in the contracted state, the nozzle head (22) of the inner nozzle tube (20) axially contracts inside the telescopic hole (13) of the outer nozzle sleeve (10); a liquid collecting part (14) is further arranged on one side of the outer nozzle sleeve (10) close to the telescopic hole (13), and in the contracted state, the liquid collecting part (14) is adapted to be arranged below the nozzle head (22) in the direction of gravity; the outer nozzle sleeve (10) further includes a return hole (11), and the return hole (11) penetrates the outer nozzle sleeve (10) to communicate with the outside and is adapted to communicate with the inside of the liquid collecting part (14); the outer nozzle sleeve (10) is axially formed with a first pressure relief hole (12), and the inner nozzle tube (20) is axially formed with a second pressure relief hole (21); the second pressure relief hole (21) moves with the movement of the inner nozzle tube (20) and communicates with the first pressure relief hole (12) in the contracted state.

2. The telescopic nozzle according to claim 1, characterized in that, along the telescopic hole (13) towards the return hole (11), the inner diameter of the liquid collecting part (14) gradually increases.

3. The telescopic nozzle according to claim 1, characterized in that, it further includes: a liquid collecting box (30) with a liquid collecting cavity (32) formed inside it, and at least part of the liquid collecting cavity (32) communicates with the return hole (11).

4. The telescopic nozzle according to claim 3, characterized in that, the liquid collecting cavity (32) communicates with the first pressure relief hole (12).

5. The telescopic nozzle according to claim 4, characterized in that, in the contracted state, a conduction loop is formed inside the telescopic nozzle through the spray hole (23), the liquid collecting part (14), the return hole (11), the liquid collecting cavity (32), the first pressure relief hole (12) and the second pressure relief hole (21).

6. The telescopic nozzle according to claim 1, characterized in that, in the extended state, the nozzle head (22) of the inner nozzle tube (20) extends outside the telescopic hole (13) of the outer nozzle sleeve (10).

7. The telescopic nozzle according to claim 3, characterized in that, a recovery hole (31) is further arranged at the bottom of the liquid collecting box (30), and the recovery hole (31) communicates with the liquid collecting cavity (32).

8. The telescopic nozzle according to any one of claims 1-7, characterized in that, One of the inner spray nozzle (20) and the outer nozzle sleeve (10) is provided with an anti-misassembly part (24), and the other is correspondingly provided with a sliding groove (15); the anti-misassembly part (24) is matched with the sliding groove (15) to ensure that the first pressure relief hole (12) is communicated with the second pressure relief hole (21) in a contracted state.

9. A liquid spraying device, characterized in that it includes the telescopic nozzle according to any one of the above claims 1-8.

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