CN212613587U

CN212613587U - Caulking gun

Info

Publication number: CN212613587U
Application number: CN202020862517.2U
Authority: CN
Inventors: 商怀帅; 周俊浩; 陈宇; 柴鑫; 袁守涛; 邵姝文; 彭慧
Original assignee: Qingdao University of Technology
Current assignee: Qingdao University of Technology
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-02-26
Anticipated expiration: 2030-05-21

Abstract

The utility model provides a caulking gun, including: the barrel is provided with an opening, the side wall of the barrel is provided with an exhaust hole and a front cover which is detachably assembled at the position of the opening; the sliding part is arranged in the cylinder in a sliding manner, and a filling cavity is formed between the sliding part and the cylinder; the pneumatic element is used for inflating the interior of the cylinder to drive the sliding piece to slide; the spray pipe is arranged in the barrel body and can stretch and retract relative to the barrel body, and a connecting part is arranged on the spray pipe; the spray nozzle is detachably connected to the spray pipe; an elastic element connected to the connection part and the front cover; the flow regulating device is arranged in the cylinder and comprises a valve and a driving mechanism for driving the valve to act, the valve is plugged at the position of the exhaust hole and can move towards the inside of the cylinder under the driving of the driving mechanism so as to change the plugging area of the exhaust hole. Through the utility model provides an all need artifical the filling to ceramic tile or floor top gap among the prior art, fill the problem that the effect is poor, the efficiency of construction is slow.

Description

Caulking gun

Technical Field

The utility model belongs to the technical field of the construction tool, concretely relates to a caulking gun for filling the gap that prestressed concrete building pulled the bottom, pulled various constructions such as top or ceramic tile and produced.

Background

Gaps are usually formed when precast concrete floor slabs are installed and tiles are laid, the gaps are wide and narrow, the gaps are long and short, the gaps are deep and shallow, the conditions that the space in the gaps is large and the gaps are narrow and small exist, sometimes, the gaps among mutually vertical components need to be filled, the existing gap filling mode mainly comprises manual filling and leveling through field construction personnel, the gaps cannot be filled compactly due to the fact that the gaps cannot be touched to the bottom of the gaps during filling, the filling speed is low due to the fact that manual filling is adopted, and construction efficiency is low.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses all need artifical the filling to ceramic tile or floor top gap among the prior art, the problem that the packing effect is poor, the efficiency of construction is slow provides a caulking gun that is used for carrying out automatic filling to ceramic tile and floor top gap, has not only realized the automatic filling in gap, has improved the efficiency of construction, but also can make the nozzle stretch into in the gap from up filling down, has ensured that the gap is filled closely knit.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

the utility model provides a caulking gun, a serial communication port, including:

the barrel is provided with an opening, the side wall of the barrel is provided with an exhaust hole and a front cover which is detachably assembled at the position of the opening;

the sliding piece is arranged in the cylinder in a sliding manner;

a pneumatic element for inflating the interior of the cylinder to drive the slide to slide;

the spray pipe is arranged in the barrel body and can stretch and retract relative to the barrel body, and a connecting part is arranged on the spray pipe;

the spray nozzle is detachably connected to the spray pipe;

one end of the elastic element is connected with the connecting part, and the other end of the elastic element is connected with the front cover;

the flow regulating device is arranged in the cylinder and comprises a valve and a driving mechanism for driving the valve to act, the valve is plugged at the position of the exhaust hole and can move towards the inside of the cylinder under the driving of the driving mechanism so as to change the plugging area of the exhaust hole.

Furthermore, actuating mechanism is including spanner, transfer line and pulley, the spanner with the barrel is articulated, transfer line one end with spanner fixed connection, the other end of transfer line with the pulley is connected the spout has been seted up on the valve, the pulley slides and sets up in the spout.

Further, still including the elasticity that drives the valve and reset the piece set up the arch on the valve, elasticity resets one end and connects in on the arch, one end is connected on the inside wall of barrel.

Furthermore, the external contour of the valve is matched with the internal contour of the exhaust hole and inserted into the exhaust hole, and the top surface of the valve is an inclined plane.

Further, the troweling device comprises a troweling plate, an annular mounting groove is formed in the front cover, the troweling plate is an arc-shaped plate and is inserted into the annular mounting groove and can rotate relative to the annular mounting groove, and limiting structures which can be matched with each other and used for limiting the rotating position of the arc-shaped plate are further arranged on the troweling plate and the annular mounting groove.

Furthermore, an insertion hole is formed in the front cover, the spray pipe is inserted into the barrel body through the insertion hole, and an annular sealing element for sealing is arranged between the spray pipe and the insertion hole.

Furthermore, the pneumatic component is characterized by further comprising a handle, a mounting cavity is formed inside the handle, a power supply is arranged in the mounting cavity, and the power supply is electrically connected with the pneumatic component.

Further, be provided with on the barrel inside wall be used for right slider motion position carries out spacing first stopper and second stopper, first stopper with the second stopper sets up the both ends of barrel.

Furthermore, the barrel also comprises a front cover, and the front cover is screwed on the barrel body through threads.

Furthermore, connecting portion are the vertical fixation and are in linking arm on the lateral wall on the spray tube, the linking arm is provided with 2, and the symmetry sets up the both sides of spray tube, elastic element corresponds and is provided with 2, 2 the equal one end of elastic element is fixed on the linking arm, and one end is fixed on the lid.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

the utility model provides a caulking gun, when caulking, the action of accessible pneumatic element, drive slider removes, the filler that will fill in the chamber passes through the spray tube, the shower nozzle outwards sprays, whole filling process is automatic packing, the efficiency of construction is improved, and accessible pushes down barrel effort to elastic element when caulking, make its transmission effort to the shower nozzle, make the shower nozzle contact with the bottom surface in gap all the time, make the gap for upwards fill from following, the filling effect in gap has been guaranteed.

The utility model provides a caulking gun still is equipped with the accent and flows the device, and it can be used for the air flow that uses the slider to the barrel inside and carry out regulation and control, and then realizes the regulation and control to the velocity of flow of the filler that will spray, has realized regulating and controlling of the velocity of flow.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a perspective view of an embodiment of the caulking gun of the present invention;

FIG. 2 is a schematic view of the internal structure of a caulking gun according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a flow control device of a caulking gun according to an embodiment of the present invention, wherein a valve is in a plugging state;

FIG. 4 is a schematic structural view of the flow control device of the caulking gun according to the embodiment of the present invention, wherein the valve is in a downward-moving state;

FIG. 5 is a schematic view of the nozzle and cartridge combination of a caulking gun according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides an embodiment of caulking gun, including:

the cylinder 100 is provided with an exhaust hole 140 on the side wall of the cylinder 100, and when the exhaust hole 140 is arranged, the exhaust hole 140 penetrates through the side wall of the cylinder 100 so as to exhaust the gas in the cylinder 100 outwards;

it also includes a detachable front cover 110 disposed in front of the barrel 100. preferably, the barrel 100 in this embodiment is a barrel with a certain length, and both ends of the barrel have openings.

The front cover 110 is detachably attached to the front opening to close the cylinder 100, and when the cartridge is loaded, the front cover 110 is opened to feed the filler through the opening.

The front cover 110 is preferably in threaded connection with the barrel 100, so that the detachable assembly is realized, the material is convenient to store and take, the sealing performance of the connection between the front cover 110 and the barrel 100 is ensured, and the filler in the barrel 100 is prevented from leaking outside through a fit gap between the front cover 110 and the barrel 100.

The sliding member 200 is slidably disposed in the cylinder 100, and a filling cavity 210 is formed between the sliding member 200 and the cylinder 100, preferably, the sliding member 200 in this embodiment is a piston, when the piston is located at an end position of the cylinder 100 far away from the front cover 110, the cavity inside the entire cylinder 100 is used for filling a filling agent, when the piston continuously moves towards the front cover 110, the piston correspondingly divides the cylinder 100 into two cavities, namely a first cavity and a second cavity, the filling agent is placed in the first cavity, and the volumes of the first cavity and the second cavity continuously change along with the movement of the piston, by the continuous movement of the piston, a force is applied to the filling agent located in the first cavity, and finally, the filling agent in the first cavity is pressed outwards.

A pneumatic element 300 for inflating the interior of the cylinder 100 to drive the sliding member 200 to slide, preferably, the pneumatic element 300 is a pneumatic pump, by which the interior of the cylinder 100 can be correspondingly inflated, and by the pneumatic force to the piston, the piston is pushed to move so as to push the filler in the filling outwards.

The nozzle 400 is disposed in the barrel 100, is capable of extending and retracting relative to the barrel 100, is partially located inside the barrel 100 and is communicated with the barrel 100, the nozzle 400 is provided with a connecting portion 410, and the connecting portion 410 is disposed opposite to the front cover 110. Preferably, the nozzle 400 in this embodiment is a thin tube with a small diameter, which is communicated with the cartridge 100, and can ensure that the filling agent in the cartridge 100 can be sprayed out through the nozzle 400.

An insertion hole is formed in the front cover 110, the nozzle 400 is inserted into the barrel 100 through the insertion hole, an annular sealing member for sealing is disposed between the nozzle 400 and the insertion hole, and the annular sealing member may be an annular sealing strip or other sealing structure commonly used in the prior art, which is not described in detail herein. For preventing the filler inside the cartridge 100 from leaking out.

Since the nozzle 400 is inserted into the insertion hole, it can be extended and retracted back and forth in the axial direction of the cartridge 100 relative to the insertion hole.

Elastic element 500 connects on connecting portion 410 and the protecgulum 110 of barrel 100, and is preferred, connecting portion 410 is the vertical fixation connecting arm on the lateral wall on spray tube 400, and the connecting arm is provided with 2, and the symmetry sets up the both sides of spray tube 400, elastic element 500 corresponds and is provided with 2, 2 the elastic element 500 uniform end is fixed on the connecting arm, and one end is fixed on the protecgulum 110.

Preferably, the elastic member 500 in this embodiment is a spring.

Nozzle 600 can dismantle the setting and be in on the spray tube 400, nozzle 600 can be provided with a plurality ofly and for different grade type and model when setting up, because nozzle 600 and spray tube 400 between be connected for dismantling, when using, can change the nozzle 600 of different grade type according to the use place of difference to make it satisfy the filling demand in the different gaps that different places correspond.

The flow regulating device 900 is arranged in the cylinder 100 and comprises a valve 910 and a driving mechanism 920 for driving the valve 910 to act, the valve 910 is blocked at the position of the exhaust hole 140, and can move towards the inside of the cylinder 100 under the driving of the driving mechanism 920 so as to change the blocking area of the exhaust hole 140.

Preferably, the outer contour of the valve 910 in this embodiment is matched with the inner contour of the exhaust hole 140 and is inserted into the exhaust hole 140, so that the exhaust hole 140 can be completely blocked when the valve 910 is inserted into the exhaust hole 140.

Further, the top surface of the valve 910 is an inclined surface, when the valve 910 moves downward and the inclined surface at the top thereof is opposite to the side wall of the exhaust hole 140, the corresponding blocking area of the valve 910 to the exhaust hole 140 changes, because the inclined surface changes in an inclined manner, the area of the blocking part of the blocking element to the exhaust hole 140 becomes smaller continuously as the valve 910 moves downward continuously, so that the opening of the exhaust hole 140, which is communicated with the outside and exhausts to the outside, becomes larger gradually, and the corresponding exhaust amount becomes larger as well, until the blocking element is completely separated from the exhaust hole 140, the exhaust hole 140 is completely opened, the exhaust amount at this time is the largest, the air flow filled into the cylinder 100 is completely exhausted through the exhaust hole 140, and at this time, the filler is not sprayed outward.

If the exhaust amount needs to be reduced, the valve 910 is controlled to move upward to increase the shielding area of the valve 910 for the exhaust hole 140.

Specifically, actuating mechanism 920 in this embodiment is including spanner 921, transfer line 922 and pulley 923, spanner 921 with barrel 100 is articulated, transfer line 922 one end with spanner 921 fixed connection, the other end of transfer line 922 with pulley 923 is connected spout 911 has been seted up on the valve 910, pulley 923 slides and sets up in the spout 911.

When the air pressure in the cylinder 100 does not need to be adjusted, the valve 910 is in a natural state and is blocked at the position of the exhaust hole 140, all the high-pressure air filled in the pneumatic element 300 acts on the piston, and the high-pressure air flow entering the cylinder 100 is completely used for spraying the filling agent and extruding the filling agent outwards.

When it is desired to reduce the amount of filler at the injection site, force can be applied to the wrench 921, the wrench 921 can be rotated, the wrench 921 can be coupled to the drive rod 922, causing the drive rod 922 to rotate, thereby driving the pulley 923 connected with the transmission rod 922 to move along the sliding groove 911, and simultaneously, the transmission rod 922 rotates to apply a force to the valve 910 through the pulley 923 to move downward, so that the valve 910 and the exhaust hole 140 start to be slowly separated, because the top surface of the valve 910 is an inclined surface, when the flow-limiting valve of the valve 910 is pulled down, a part of the air flow is discharged from the air vent 140, the air used for injecting the filling agent in the cylinder 100 is reduced, the air pressure in the cylinder is reduced, the injection rate is reduced, as the pulling amplitude of the wrench 921 is increased, the degree of pulling down the valve 910 is increased, the high pressure gas discharged through the discharge hole 140 is increased until the high pressure gas is completely discharged from the discharge hole 140, and the filler injection may be suspended.

In order to realize the resetting of the valve 910 after being pulled down by the wrench 921, in this embodiment, an elastic resetting member 930 for driving the valve 910 to reset is further provided, the valve 910 is provided with a protrusion 912, one end of the elastic resetting member 930 is connected to the protrusion 912, and the other end is connected to the inner side wall of the cylinder 100.

Specifically, during the setting, the protrusions 912 may be disposed on two sides of the valve 910, the connection block is disposed on the inner sidewall of the cylinder 100, and the elastic reset element is preferably a spring, and during the connection, one end of the elastic reset element is connected and fixed to the connection block, and the other end of the elastic reset element is connected and fixed to the protrusions 912.

When the valve 910 is moved downward by the force of the wrench 921 and the transmission rod 922, a force is applied to the elastic restoring element, the elastic restoring element is stretched, and when the force applied to the valve 910 is removed, the elastic restoring element can drive the valve 910 to move upward by the reverse elastic force, so that the valve 910 is restored.

In order to realize the floating of the gap after filling, the caulking gun in this embodiment further includes a floating plate, an annular mounting groove 111 is provided on the front cover 110, the floating plate is an arc-shaped plate, and is inserted into the annular mounting groove 111 and can rotate relative to the annular mounting groove 111, and a limiting structure which can be mutually matched and used for limiting the rotating position of the floating plate is further provided on the floating plate and the annular mounting groove 111.

The troweling plate can rotate circumferentially relative to the annular mounting groove 111 on the front cover 110, and the troweling plate is assembled in the annular mounting groove 111, so that the troweling plate is assembled. Simultaneously, but the annular mount pad rotates relatively behind the assembly of troweling board in annular mounting groove 111 in this embodiment, can make the troweling board can rotate different positions to satisfy the troweling demand of the different troweling positions that correspond under the operating mode of difference.

When the trowelling plate rotates to the right place and is to be smoothed, the trowelling plate is positioned by corresponding needs to be leveled, and the positioning and fixing of the trowelling plate are mainly realized through a limiting structure arranged between the annular mounting groove 111 and the trowelling plate.

Preferably, the limit structure in this embodiment includes: the limiting device comprises a plurality of arc-shaped limiting protrusions 912 arranged on the inner side wall of the annular mounting groove 111 and limiting holes arranged on a troweling plate, wherein the limiting holes in the troweling plate are clamped on one of the arc-shaped limiting protrusions 912.

When adjusting the floating plate position, can use hand effort to the floating plate for spacing hole breaks away from with the spacing arch of arc (not shown in the figure), then rotates the floating plate along annular mounting groove 111, when spacing hole rotated relevant position, carries out spacing fixedly on the spacing arch of arc of going into corresponding position department.

When setting up, can evenly arrange a plurality of arc spacing archs along annular mounting groove 111 circumference direction densely to realize the adjustment and the location of a plurality of different positions of trowelling plate.

Preferably, the troweling plate in the embodiment is made of elastic rubber, has elasticity, can deform after being pressed, can be always in close contact with a trowelled surface when troweling is performed, and ensures the troweling effect on gaps.

Meanwhile, the troweling plate in the embodiment is arc-shaped, so that the troweling plate can be well attached to a surface to be trowelled, and the troweling effect is ensured.

In the embodiment, when the caulking gun is used, the nozzle 600 and the nozzle 400 are inserted into the gap, the pneumatic element 300 is controlled to act, the cylinder 100 is inflated, then acting force is applied to the piston through air pressure to push the piston to move, the filling agent in the cylinder 100 is extruded outwards, the filling agent is sprayed outwards through the nozzle 600 through the nozzle 400, so as to realize caulking, when caulking is performed, in order to ensure that the filled gap is compact and the filling effect is good, the nozzle 600 is inserted into the gap, the cylinder 100 is pressed downwards to apply acting force to the elastic element 500, the nozzle 600 is always contacted with the bottom surface of the gap through the acting force of the elastic element 500, and meanwhile, the gap is filled through continuously spraying the filling agent outwards through the nozzle 600, wherein when the depth of the gap is shallow, the compression amount of the elastic element 500 is large, and when the depth of the gap is deep, the compression amount of the elastic element 500 is small, and when the gap is deep, the gap cannot be completely filled only by spraying the nozzle 600 at the bottom, at this time, the barrel 100 can be slightly lifted up after spraying for a period of time, so that the nozzle 600 moves upwards to continue the spraying and filling of the upper part.

When the gap is filled and the top surface of the gap needs to be smoothed, in order to ensure that the troweling plate can contact the top surface of the gap, the cylinder body 100 can be correspondingly pressed downwards to compress the elastic element 500, so that the troweling plate can contact the top surface of the gap to be smoothed no matter the gap is deep or shallow.

In order to facilitate the operation and carrying of the user, the filler in this embodiment further includes a handle 800, a mounting cavity 810 is formed inside the handle 800, a power supply 820 is disposed inside the mounting cavity 810, and the power supply 820 is electrically connected to the pneumatic element 300. When connected, the power source 820 may be connected to the pneumatic element 300 via an electrical wire for powering the pneumatic element 300.

The caulking gun in this embodiment further comprises a gas source 310, wherein the gas source 310 is connected with the gas inlet of the pneumatic element 300 and is used for supplying gas to the pneumatic element 300.

In order to limit the movement range of the piston and prevent the piston from being separated from the cylinder 100, a first limiting block 120 and a second limiting block 130 for limiting the movement position of the piston are arranged on the inner side wall of the cylinder 100, and the first limiting block 120 and the second limiting block 130 are arranged at two ends of the cylinder 100.

When the piston moves to the positions of the first stopper 120 and the second stopper 130, the piston is stopped and cannot move continuously.

In the caulking gun in the embodiment, when the caulking gun is used, the nozzle 600 and the spray pipe 400 can be directly inserted into the gap, the acting force is applied to the cylinder body 100, and the elastic element 500 is compressed, so that the nozzle 600 is always in contact with the bottom surface of the gap correspondingly, the gap is filled by the filling agent from bottom to top from the bottom of the gap, and the situation that the filling is not compact due to the fact that the bottom is not filled in place is effectively avoided;

when the nozzle 600 contacts with the bottom surface of the gap and the filling is performed along the bottom of the gap, the bottom surface of the gap may be uneven due to factors such as building construction, for example, when the bottom surface of the gap has a protrusion, the protrusion applies force to the nozzle 600, and the nozzle 600 applies force to the nozzle 400. However, the nozzle 400 in this embodiment is retractable with respect to the barrel 100, and can move and retract toward the inside of the barrel 100 after being stressed, and meanwhile, the connecting portion 410 is driven to move toward the side close to the front cover 110, and the elastic element 500 is compressed, so that the nozzle 600 can contact with the protrusion, and further the caulking gun in this embodiment can be adapted to fill the uneven gap bottom surface, when the nozzle 600 continues to move to spray and fill through the protruded position, the elastic element 500 can apply an acting force to the connecting arm on the nozzle 400, and the nozzle 400 is driven to move outward with respect to the barrel 100 through the connecting arm, so that the nozzle 600 can always abut against the bottom surface position of the gap, and the gap filling effect is ensured.

The caulking gun in this embodiment further includes a flow adjusting device 900, which can adjust the amount of the air flow for injecting the filler in the cylinder 100, so as to adjust and control the flow rate of the injected filler.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A caulking gun, comprising:

the sliding piece is arranged in the cylinder in a sliding manner;

the spray nozzle is detachably connected to the spray pipe;

2. The caulking gun according to claim 1, wherein the driving mechanism comprises a wrench, a transmission rod and a pulley, the wrench is hinged to the barrel, one end of the transmission rod is fixedly connected to the wrench, the other end of the transmission rod is connected to the pulley, a sliding groove is formed in the valve, and the pulley is slidably disposed in the sliding groove.

3. The caulking gun according to claim 1, further comprising an elastic reset member for resetting the valve, wherein the valve is provided with a protrusion, one end of the elastic reset member is connected to the protrusion, and the other end of the elastic reset member is connected to the inner side wall of the cylinder.

4. The caulking gun according to claim 3, wherein the valve has an outer contour adapted to an inner contour of the vent hole and is inserted into the vent hole, and wherein the top surface of the valve is beveled.

5. The caulking gun according to claim 1, further comprising a troweling plate, wherein an annular mounting groove is formed in the front cover, the troweling plate is an arc-shaped plate which is inserted into the annular mounting groove and can rotate relative to the annular mounting groove, and limiting structures which can be matched with each other and are used for limiting the rotation position of the troweling plate are further arranged on the troweling plate and the annular mounting groove.

6. The caulking gun according to claim 1, wherein an insertion hole is formed in the front cover, the nozzle is inserted into the barrel through the insertion hole, and an annular sealing member for sealing is provided between the nozzle and the insertion hole.

7. The caulking gun according to claim 1, further comprising a handle, a mounting cavity formed within the handle, a power source disposed within the mounting cavity, the power source being electrically connected to the pneumatic element.

8. The caulking gun according to claim 1, wherein a first stopper and a second stopper for limiting the movement position of the slider are provided on the inner side wall of the cylinder, and the first stopper and the second stopper are provided at both ends of the cylinder.

9. The caulking gun according to claim 1, wherein the front cap is threaded onto the barrel.

10. The caulking gun according to claim 1, wherein the connecting parts are connecting arms vertically fixed on the side wall of the spray pipe, the connecting arms are provided with 2 numbers, symmetrically arranged on two sides of the spray pipe, the elastic elements are correspondingly provided with 2 numbers, and each of the 2 elastic elements is fixed on the connecting arms at one end and fixed on the front cover at the other end.