KR20180116557A - A liquid spraying device - Google Patents

Abstract

The present invention relates to a liquid spraying device for vertically and horizontally spraying liquid, such as various water, chemicals, liquid fertilizer, etc., which comprises: a base plate; a coupling frame; a first driving unit; a spray head; a first spray body; a second spray body; and a second driving unit. The base plate has a first driven arm and a hinge bracket spaced apart from each other on an upper surface thereof, and a lower surface thereof coupled to a cradle. The coupling frame has one side surface adjacent to the first driven arm to be opened, the other side surface adjacent to the hinge bracket to be hinged thereto so as to form a C-shape, and is installed spaced apart from the base plate at a predetermined height. The first driving unit is allowed to be vertically rotated with respect to the hinge bracket. The spray head has a plurality of spray holes formed at regular intervals, is coupled to an upper or lower surface of the coupling frame, and receives high-pressure liquid from a storage tank to spray the same. The first spray body is rotatably coupled to an upper part of the spray head, and has a first spray hole formed on the outside. The second spray body is rotatably coupled to a lower part of the spray head, and has a second spray hole formed on the outside. The second driving unit independently rotates first and second spray bodies to allow the first and second spray holes to horizontally cross each other. According to the present invention, a spray range of liquid is expanded while the liquid sprayed from the first and second spray bodies is vertically and horizontally sprayed by driving of the first and second driving units.

Description

[0001] The present invention relates to a liquid spraying device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid ejection apparatus, and more particularly, to a liquid ejection apparatus capable of ejecting liquids such as various kinds of water, medicines,

Liquid spraying devices are used for various purposes such as spraying the water necessary for farming into the field or spraying agricultural chemicals, liquid fertilizer (liquid fertilizer) onto crops.

In the past, the sprayer was sprayed while the human being carried the nozzle stand connected with the high-pressure hose. However, there was a problem that the human consumption was large and the human was directly exposed to the chemical liquid, causing various poisoning accidents.

For this reason, recently, a storage tank in which liquid is stored and a vehicle on which the liquid injection device is mounted are used for injection. As a representative example, there is a "liquid fertilizer composite duster " described in Korean Patent Registration No. 10-1123923.

The conventional "liquid fertilizer compound spreader" freely rotates up and down and left and right using the hydraulic motor 64 and the hydraulic cylinder 65, and the air blower spreader 60 mounted on the trailer 10 pulled by the tractor 100 freely rotates, And adopts a method of spraying the liquid fertilizer away by using wind power.

This method is advantageous in that the liquid can be sprayed in a desired direction by adjusting the direction of the sprayer, but the spraying range of the liquid is limited to the direction of the sprayer and limited to the opening surface area of the spray nozzle 61a There is a problem in that it is relatively narrow.

Korean Registered Patent No. 10-1123923 (Registered on March 14, 2012, entitled: Liquid fertilizer compound spreader)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a liquid ejection apparatus which can widely spread liquid droplets uniformly, .

In order to achieve the above object, a liquid injection apparatus according to the present invention includes a base plate 100 on which a first end arm 110 and a hinge bracket 120 are spaced apart from each other, ; The other side adjacent to the hinge bracket 120 is hinged to the hinge bracket 120 and spaced apart from the base plate 100 at a predetermined height. A " C "shaped combined frame 200; A first driving unit 300 that causes the coupling frame 200 to pivot up and down with respect to the hinge bracket 120; An injection head 400 formed at a predetermined interval with a plurality of spray holes 410 and coupled to an upper surface or a lower surface of the coupling frame 200 to supply and discharge high pressure liquid L from a storage tank; A first jet body 500 rotatably coupled to an upper half of the jet head 400 and having a first jet opening 510 formed on an outer side thereof; A second jetting body 600 rotatably coupled to a lower half of the jetting head 400 and having a second jetting port 610 formed on the outer side thereof; And a second driving unit 700 for independently rotating the first jetting member 500 and the second jetting member 600 to intersect the first jetting port 510 and the second jetting port 610 left and right, And the liquid L ejected from the first ejecting body 500 and the second ejecting body 600 is ejected in accordance with the driving of the first driving part 300 and the second driving part 700 And the injection range of the liquid L is enlarged while being sprayed vertically and horizontally.

The first driving unit 300 may include a first motor 310 coupled to an upper surface of the coupling frame 200 and a second motor 310 coupled to the first rotation shaft The first main rocking arm 320 and the first main rocking arm 320 are coupled to each other so that the coupling frame 200 is pushed or pulled by the rotation of the first main rocking arm 320, And may include a first crankshaft 330 connecting the longitudinal rocking arms 110.

The liquid ejecting apparatus according to the present invention further includes a control unit for controlling a rotation direction of the first rotation shaft 311 of the first motor 310. The control unit controls the first rotation shaft 311 to rotate 360 And controls the first motor 310 so that the forward rotation and the reverse rotation are alternately performed within an axial rotation range of the first crankshaft 330 and the second crankshaft 330 in proportion to the shaft rotation range of the first rotation shaft 311, , The vertical spraying range of the liquid L can be adjusted.

In the liquid ejecting apparatus according to the present invention, the second longitudinal arm 520 is protruded outward from the outer side surface of the first ejecting body 500, The third driving arm 620 is protruded outward and the second driving unit 700 includes a second rotation shaft 711 passing through the upper surface of the coupling frame 200, A driving shaft 720 disposed inside the coupling frame 200 in parallel to the second rotation shaft 711 and a driving shaft 720 disposed on the other side of the coupling frame 200, A pair of support pieces 730 protruding toward the differential shaft 720 to rotatably support the differential shaft 720 and a pair of support pieces 730 projecting toward the differential shaft 720 and transmitting the rotational force of the second rotation shaft 711 to the differential shaft 720. [ A second main rocking arm 750 coupled to one end of a differential shaft 720 corresponding to the second longitudinal arm 520 and a second main rocking arm 750 coupled to one end of the differential shaft 720, The second main rocking arm 750 and the second main rocking arm 750 are rotated so that the rotational motion of the second main rocking arm 750 is converted into the swinging motion of the second ending rocking arm 520, A second crankshaft 770 connecting the first main rocking arm 760 and the third main rocking arm 760 so that the rotational motion of the third main rocking arm 760 is converted into a swing motion of the third ending rocking arm 620, And a third crankshaft 780 connecting the third main rocking arm 620 and the second main rocking arm 750 and the third main rocking arm 760 on the basis of the differential shaft 720, The second crankshaft 770 and the third crankshaft 780 make a reciprocating linear motion with a time difference from each other due to the difference in angle between the first crankshaft 770 and the third crankshaft 780, They can cross each other on the left and right sides.

The liquid ejecting apparatus according to the present invention further includes a control unit for controlling the rotation direction of the second rotation shaft 711 of the second motor 710, And controls the second motor 710 so that the forward rotation and the reverse rotation are alternately performed within the axial rotation range of the second crankshaft 770. The second motor 710 controls the second crankshaft 770 in proportion to the shaft rotation range of the second rotation shaft 711, And the third reciprocating linear motion of the third crankshaft 780 are different from each other, the right and left injection ranges of the liquid L can be adjusted.

In the liquid ejecting apparatus according to the present invention, the first ejecting body 500 and the second ejecting body 600 are provided in the shape of a cylinder which is opened upside down so that the ejecting head 400 can be inserted therein And a second ejection body 600. The first ejection body 500 and the second ejection body 600 are formed to receive the rotation of the first and second ejection bodies 500 and 600 and to support the first and second ejection bodies 500 and 600, A plurality of bearing members 800 inserted and fixed between both ends of the first ejecting head 500 and the ejecting head 400 and between both ends of the second ejecting body 600 and the ejecting head 400; A packing cap 910 inserted and fixed in the bearing member 800 having a cross section of a "C" shape and abutting against the liquid supplied from the injection head 400, And a packing member 900 having an elastic member 920 that surrounds the inner circumferential surface 911 of the cap 910 and presses the packing cap 910 toward the injection head 400.

According to the liquid ejecting apparatus of the present invention, the liquid ejected from the pair of ejecting bodies is ejected upward, downward, leftward, and rightward, so that the ejecting range of the liquid is enlarged. Further, since the pair of injectors are rotated and crossed independently of each other, an effect that the liquid can be uniformly applied to the left and right can be obtained.

This makes it possible to increase the efficiency of various liquid spraying operations such as pesticide spraying, liquid spraying, prevention, spraying, and spraying of yellow clay for preventing red tide.

Particularly, the present invention can precisely spray the liquid in a desired range by widening or narrowing the upper and lower jetting range or the left and right jetting range of the liquid as needed, and attaching it to trucks, cultivators, fire trucks and the like, There are advantages.

1 is a perspective view of a liquid ejection apparatus according to an embodiment of the present invention;
FIG. 2 is a perspective view of the liquid ejecting apparatus of FIG. 1 viewed from a different angle; FIG.
3 is a perspective view illustrating a driving mechanism of a second driving unit included in the liquid ejecting apparatus of FIG.
4 is a view for explaining the driving principle of the first driving unit and the second driving unit included in the liquid ejecting apparatus of FIG.
5 is a use state diagram of the liquid ejection apparatus of FIG.
Fig. 6 is an exploded perspective view of the ejection head, the bearing member, and the packing member included in the liquid ejection apparatus of Fig. 1 in an exploded state; Fig.
FIG. 7 is a partially cutaway perspective view showing a state in which a bearing member is separated to explain an internal structure of a packing member included in the liquid injection device of FIG. 1;

Hereinafter, embodiments of the liquid ejection apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a perspective view of a liquid ejecting apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the liquid ejecting apparatus of FIG. 1 viewed from another angle, FIG. 3 is a cross- FIG. 4 is a view for explaining the driving principle of the first driving unit and the second driving unit included in the liquid ejecting apparatus of FIG. 1, and FIG. 5 is a view for explaining the driving principle of the liquid ejecting apparatus of FIG. Fig. 6 is an exploded perspective view showing the ejection head, the bearing member and the packing member included in the liquid ejecting apparatus of Fig. 1 in an exploded state, Fig. 7 is an exploded perspective view of the liquid ejecting apparatus of Fig. Is a partially cutaway perspective view showing a state in which the bearing member is separated to explain the internal structure of the member.

1 to 7, the liquid ejection apparatus 10 according to an embodiment of the present invention is an apparatus for ejecting liquids such as various kinds of water, medicines, A frame 200, a first driving unit 300, a jetting head 400, a first jetting member 500, a second jetting member 600, and a second driving unit 700.

The first base arm 100 and the hinge bracket 120 are spaced apart from each other on the upper surface of the base plate 100 and the lower base is coupled to a base provided on a vehicle, a ship, or the like. It is preferable that the base plate 100 is detachably attached to a cradle so as to be detachably attached to a truck, a cultivator, a fire truck or the like and used for various purposes if necessary.

The coupling frame 200 is opened at one side adjacent to the first arm type arm 110 and the other side adjacent to the hinge bracket 120 is shielded to form a "C" shape, and the other side of the coupling frame 200 And is hinged to the hinge bracket 120 to be spaced apart from the base plate 100 by a predetermined height.

The first driving unit 300 rotates the coupling frame 200 up and down with respect to the hinge bracket 120 as shown in the left side of FIG. 1 or FIG. The first driving unit 300 includes a first motor 310 coupled to the upper surface of the coupling frame 200, a first main rocking arm 320 mounted on the first rotating shaft 311 of the first motor 310, And a first crank shaft 330 connecting the first main rocking arm 320 and the first longitudinal rocking arm 110 such that the coupling frame 200 is pushed or pulled by the rotation of the first main rocking arm 320, .

A structure in which the rotational motion of the first main rocking arm 320 rotated by the first motor 310 is converted into the reciprocating linear motion of the first longitudinal rocking arm 110 through the first crankshaft 330, 200 are vibrated up and down with reference to the base plate 100 fixed to the vehicle.

6, a plurality of spray holes 410 are formed at regular intervals and are coupled to the upper surface or the lower surface of the coupling frame 200, and a high-pressure liquid L is supplied from the storage tank Supply and dispense.

1, a supply pipe L connected to a storage tank is connected to a lower end of the injection head 400. A part of the lower surface of the base plate 100 through which the supply pipe L passes is opened to allow the supply pipe L to communicate with the injection head 400 So that it can be drawn in a straight line at the lower end of the frame.

The first jetting body 500 is rotatably coupled to the upper half of the jetting head 400 and the second jetting body 600 is rotatably coupled to the lower half thereof. As shown in FIG. 6 or 7, the first jet body 500 and the second jet body 600 are provided in the shape of a cylinder whose top and bottom are opened so that the jetting head 400 can be inserted therein, A plurality of bearing members 800 are inserted and fixed between both ends of the one-minute carcass 500 and the jetting head 400 and between both ends of the second jetting body 600 and the jetting head 400. The bearing member 800 receives the rotation of the first and second injection bodies 500 and 600 and supports the first and second injection bodies 500 and 600.

A plurality of packing members 900 are coupled to the inside of the bearing member 800 that abuts against the liquid so that the bearing member 800 is not in contact with the liquid L supplied from the injection head 400. [ The packing member 900 has a packing cap 910 having a "C" -shaped cross section and inserted and fixed in the bearing member 800 which abuts against the liquid, and a packing cap 910 in contact with the injection head 400 And an elastic member 920 which surrounds the inner circumferential surface 911 and presses the packing cap 910 toward the injection head 400 side.

It is preferable that both sides 911 of the inner circumferential surface of the packing cap 910 pressed by the elastic member 920 are protruded toward the injection head 400 side so that the liquid does not leak or the outside dust does not enter.

A first jetting port 510 and a second jetting port 610 are formed on the outer sides of the first jetting body 500 and the second jetting body 600, respectively. The high pressure liquid L ejected from the injection hole 410 of the injection head 400 through the first injection port 510 and the second injection port 610 is injected to the outside of the vehicle.

The second driving unit 700 independently rotates the first and second jet bodies 500 and 600 to rotate the first jetting port 510 and the second jetting port 610, So as to cross each other to the left and right.

The second driving unit 700 includes a second motor 710, a differential shaft 720, a pair of supporting pieces 730, a power transmitting unit 730, A first main rocking arm 740, a second main rocking arm 750, a third main rocking arm 760, a second crankshaft 770 and a third crankshaft 780, The second longitudinal rocking arm 520 and the third longitudinal rocking arm 620 are protruded outward from the outer surfaces of the first and second bodies 500 and 600, respectively.

The second motor 710 has a second rotation shaft 711 passing through the upper surface of the coupling frame 200 and is separated from the first motor 310 and coupled to the upper surface of the coupling frame 200. The differential coaxial shaft 720 is disposed inside the coupling frame 200 in parallel with the second rotary shaft 711 and includes a pair of supporting pieces 720 protruding from the other side of the coupling frame 200 toward the differential shaft 720 730).

The power transmitting portion 740 is an element for transmitting the rotational force of the second rotating shaft 711 to the differential shaft 720. The power transmitting portion 740 may be manufactured in the form of a belt-pulley as in the present embodiment, a sprocket- It can be replaced by various mechanical elements.

The second main rocking arm 750 and the third main rocking arm 760 are coupled to both ends of the differential shaft 720 while the second main rocking arm 750 and the third main rocking arm 760 are coupled to the differential shaft 720 As shown in FIG. The second main rocks 750 correspond to the second longitudinal rocks 520 and the third main rocks 760 correspond to the third longitudinal rocks 620. The second main rocks 750 correspond to the second main rocks 750, The ends of the third main rocking arm 760 and the third end rocking arm 620 are connected to each other by a third crankshaft 780.

The second main rocking arm 750 and the third main rocking arm 760 can be rotated simultaneously with the rotation of the differential shaft 720 and the rotation of the second main rocking arm 750 and the third main rocking arm 760 The second crankshaft 770 and the third crankshaft 780 make a reciprocating linear motion with a time difference from each other according to the angular difference and the second and fourth tongue-like rocks 520 and 620, The swinging motion of the left and right sides causes the first jetting port 510 and the second jetting port 610, which are opposite to each other, to reciprocate right and left while intersecting each other.

That is, as shown in the left side of FIG. 4, the coupling frame 200 to which the first and second bodies 500 and 600 are fixed is rapidly vibrated up and down by driving the first motor 310 , The liquid L injected from the first ejection opening 510 and the second ejection opening 610 may be dispersed vertically and spread widely as shown in the upper side of FIG. At the same time, as shown in the right side of FIG. 4, the first and second bodies 500 and 600 are rotated independently of each other by driving the second motor 710, The liquid L sprayed from the first jetting port 510 and the second jetting port 610 can be dispersed in a laterally spreading manner and can be widely sprayed and the first jetting port 510 and the second jetting port 610 The liquid L is divided into two parts and is staggered left and right so that the liquid L can be sprayed more uniformly.

As a result, the liquid L ejected from the first and second ejecting bodies 500 and 600 is ejected upward, downward, leftward, and rightward according to the driving of the first and second driving units 300 and 700, Can be expanded, and the liquid L can be injected more uniformly.

The liquid injection device is mostly mounted on a vehicle and moves with the vehicle to spray liquid. Therefore, as the spraying range of the liquid becomes wider, it becomes possible to quickly and efficiently perform various spraying operations such as pesticide spraying, liquid spraying, spraying, water spraying, and yellowing spraying for preventing red tide, in a short period of time.

On the other hand, it is necessary to adjust the spraying range of the liquid in accordance with the width of the furrow, the height of the tree in the orchard, the size of the furrow, the width of the red tide. To this end, the present invention further comprises a control unit.

Referring to FIG. 4, the controller controls the rotation direction of the first rotation shaft 311 of the first motor 310 and the rotation direction of the second rotation shaft 711 of the second motor 710, respectively. The controller controls the first motor 310 and the second motor 710 such that the first rotation axis 311 and the second rotation axis 711 alternately perform forward rotation and reverse rotation within an axial rotation range of less than 360 ° .

The control unit controls the rotation direction and the rotation range of the rotation axis so that the first rotation axis 311 and the second rotation axis 711 are not continuously rotated in only one direction. Accordingly, the distance of the reciprocating linear motion of the first crank shaft 330 varies in proportion to the axial rotation range of the first rotary shaft 311, The reciprocating linear motion of the crankshaft 770 and the third crankshaft 780 varies, and the upper and lower injection ranges or the left and right injection ranges of the liquid L become wider or narrower.

As described above, by controlling the injection range of the liquid by the control unit variably, it is possible to further improve the accuracy and efficiency of the liquid injection operation.

According to the liquid ejection apparatus of the present invention configured as described above, since the liquid ejected from the pair of ejecting bodies is ejected vertically and horizontally, the ejecting range of the liquid is enlarged. Further, since the pair of injectors are rotated and crossed independently of each other, an effect that the liquid can be uniformly applied to the left and right can be obtained.

This makes it possible to increase the efficiency of various liquid spraying operations such as pesticide spraying, liquid spraying, prevention, spraying, and spraying of yellow clay for preventing red tide.

Particularly, the present invention can precisely spray the liquid in a desired range by widening or narrowing the upper and lower jetting range or the left and right jetting range of the liquid as needed, and attaching it to trucks, cultivators, fire trucks and the like, There are advantages.

The scope of the present invention is not limited to the above-described embodiments and modifications, but can be implemented in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10: A liquid ejecting apparatus according to an embodiment of the present invention
100: Base plate
200: Coupling frame
300:
400: injection head
500: first spray body
600: second spray body
700: second driving section
800: Bearing member
900: packing member

Claims (6)

A base plate 100 disposed on an upper surface of the first arm 100 and a hinge bracket 120 spaced apart from each other;
The other side adjacent to the hinge bracket 120 is hinged to the hinge bracket 120 and spaced apart from the base plate 100 at a predetermined height. A " C "shaped combined frame 200;
A first driving unit 300 that causes the coupling frame 200 to pivot up and down with respect to the hinge bracket 120;
An injection head 400 formed at a predetermined interval with a plurality of spray holes 410 and coupled to an upper surface or a lower surface of the coupling frame 200 to supply and discharge high pressure liquid L from a storage tank;
A first jet body 500 rotatably coupled to an upper half of the jet head 400 and having a first jet opening 510 formed on an outer side thereof;
A second jetting body 600 rotatably coupled to a lower half of the jetting head 400 and having a second jetting port 610 formed on the outer side thereof; And
A second driving unit 700 for independently rotating the first jet body 500 and the second jet body 600 to intersect the first jetting port 510 and the second jetting port 610 left and right, Lt; / RTI >
The liquid L ejected from the first ejecting body 500 and the second ejecting body 600 is ejected vertically and horizontally according to the driving of the first driving unit 300 and the second driving unit 700, So that the jetting range of the liquid (L) is enlarged. The method according to claim 1,
The first driving unit 300 includes a first motor 310 coupled to an upper surface of the coupling frame 200 and a second main motor 310 coupled to the first main shaft 311 of the first motor 310, The first main rocking arm 320 and the first main rocking arm 320 are connected to each other so that the coupling frame 200 is pushed or pulled by the rotation of the first main rocking arm 320, And a crankshaft (330). 3. The method of claim 2,
And a control unit for controlling the rotation direction of the first rotation shaft 311 of the first motor 310,
The control unit controls the first motor 310 such that the first rotation shaft 311 alternately performs forward rotation and reverse rotation within an axial rotation range of less than 360 °,
Wherein a distance of reciprocating linear motion of the first crankshaft (330) is changed in proportion to a shaft rotation range of the first rotation shaft (311), and a vertical spray range of the liquid (L) Device. The method according to claim 1,
The second longitudinal arm 520 is protruded outward from the outer surface of the first body 500,
On the outer surface of the second jetting body 600, a third type of arm 620 protrudes outward,
The second driving unit 700 includes a second motor 710 having a second rotating shaft 711 passing through an upper surface of the coupling frame 200 and coupled to an upper surface of the coupling frame 200, A driving shaft 720 disposed inside the coupling frame 200 in parallel with the second rotary shaft 711 and a second shaft 720 projecting from the other side of the coupling frame 200 toward the differential shaft 720, A power transmitting portion 740 for transmitting the rotational force of the second rotating shaft 711 to the differential shaft 720, and a second power transmitting portion 740 for transmitting the rotational force of the second rotating shaft 711 to the differential shaft 720. [ A second main rocking arm 750 coupled to one end of a differential shaft 720 corresponding to the second main rocking arm 520 and a third main rocking arm 760 coupled to the other end of the differential shaft 720, A second crankshaft 770 connecting the second main rocking arm 750 and the second longitudinal rocking arm 520 so that the rotational motion of the main rocking arm 750 is converted into a swinging motion of the second longitudinal rocking arm 520, , remind A third crankshaft 780 connecting the third main rocking arm 760 and the third longitudinal rocking arm 620 so that the rotational motion of the third main rocking arm 760 is converted into the swinging motion of the third- / RTI >
The second crankshaft 770 and the third crankshaft 780 are rotated by the angle difference between the second main rocking arm 750 and the third main rocking arm 760 with respect to the differential shaft 720, Wherein the first jetting port (510) and the second jetting port (610) intersect each other on the left and right sides by reciprocating linear motion with a time difference from each other. 5. The method of claim 4,
And a control unit for controlling the rotation direction of the second rotation shaft 711 of the second motor 710,
The control unit controls the second motor 710 such that the second rotation shaft 711 alternates between forward rotation and reverse rotation within an axial rotation range of less than 360 °,
The distance of reciprocating linear motion of the second crankshaft 770 and the third crankshaft 780 is changed in proportion to the axial rotation range of the second rotation shaft 711, And the range is adjusted. The method according to claim 1,
The first and second bodies 500 and 600 are cylindrically shaped so that the injection head 400 can be inserted therein,
The first ejecting body 500 and the second ejecting body 600 are formed so as to receive the rotation of the first and second ejecting bodies 500 and 600 and to support the first and second ejecting bodies 500 and 600, A plurality of bearing members 800 inserted and fixed between both ends of the first ejecting head 600 and the ejecting head 400 and between both ends of the second ejecting body 600 and the ejecting head 400; And
A packing cap 910 having a "C" -shaped cross section and inserted and fixed in a bearing member 800 which abuts against the liquid supplied from the injection head 400, a packing cap 910 which is in contact with the injection head 400, Further comprising a packing member (900) having an elastic member (920) surrounding the inner circumferential surface (911) of the packing cap (910) and pressing the packing cap (910) toward the injection head (400) Jetting device.

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