CN110918298B

CN110918298B - Knapsack sprayer

Info

Publication number: CN110918298B
Application number: CN201911300792.3A
Authority: CN
Inventors: 林太池; 张文森
Original assignee: Taizhou Spey Demirel Plant Protection Machinery Co ltd
Current assignee: Taizhou Spey Demirel Plant Protection Machinery Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-12-15
Anticipated expiration: 2039-12-17
Also published as: CN110918298A

Abstract

The invention discloses a knapsack sprayer, which has the technical scheme that: the liquid storage device comprises a soft bag used as a liquid storage container, wherein support bars and hinge rods are fixed on the inner wall of the soft bag along the vertical direction, a plurality of rib rods are hinged to two sides of the width of each support bar respectively and are arranged at intervals along the length direction of the support bars, and two rib rods with the same height are arranged and are symmetrically arranged relative to the support bars; the rib rods are bent in an arc shape along the inner wall of the soft bag and fixed on the inner wall of the soft bag, the end parts of the rib rods at the same height, which are far away from the supporting bars, are hinged through a first connecting rod and a second connecting rod which are arranged between the rib rods and the supporting bars, and the first connecting rod, the second connecting rod, the two rib rods and the supporting bars at the same height are surrounded into a closed annular structure. The sprayer can form a supporting structure similar to a framework in the soft bag by arranging the hinge rod, the supporting strip and the rib rod, and has the advantage of convenient water injection; the rib rod of the sprayer can rotate and swing and has the soft function of a soft bag.

Description

Knapsack sprayer

Technical Field

The invention relates to the technical field of sprayers, in particular to a knapsack sprayer.

Background

The atomizer wide application is in the agricultural production field, and the atomizer is used for water or liquid medicine atomizing blowout, and the atomizer can form great spraying scope to spout on the blade of plant in order to prevent and treat the plant diseases and insect pests. The knapsack sprayer belongs to portable sprayer, and the user can move the knapsack sprayer on the back together to spray the passing crop area. At present, hand-operated knapsack sprayers have been gradually replaced by electric sprayers.

The Chinese patent application with the prior application publication number of CN102730324A discloses a sprayer, which comprises a soft solution containing bag and a spray nozzle, wherein the spray nozzle is connected to the solution containing bag through a soft hollow pipe, a suction device is arranged inside the spray nozzle, the suction device is three inclined blades fixed on a rotating shaft, the rotating shaft is connected with a power plug through an electric wire, the solution containing bag is provided with a feed inlet, the periphery of the feed inlet is provided with threads, and a feed cover is spirally fixed on the feed inlet.

The above prior art solutions have the following drawbacks: after the soft bag is used as a container for containing solution, the soft bag is easy to deform and poor in self-supporting effect, so that when people fill water into the soft bag, the soft bag is easy to deform, and the soft bag is often required to be supported by hands of people, and the defect of inconvenience in water filling exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a knapsack sprayer which has the advantage of convenient water injection.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a knapsack sprayer, includes the soft bag that is used as the stock solution container, is used for the spray gun of spraying, orders about liquid from spray gun spun actuating mechanism, the soft bag is equipped with the feed inlet, the soft bag inner wall is fixed with the support bar, is provided with the hinge bar along vertical direction, support bar, hinge bar are located the subtend both sides of soft bag inner chamber respectively, the width both sides of support bar articulate respectively has many rib poles, the axial of its hinge shaft is along the length direction of support bar, the rib pole is along the length direction interval arrangement of support bar, and the rib pole of same height is equipped with two and sets up about the support bar symmetry;

the rib pole is the arc bending and is fixed in soft bag inner wall along soft bag inner wall, and the tip that the rib pole of same height deviates from the support bar is through setting up connecting rod one, connecting rod two between the two to be connected, the hinge bar passes the tip of all connecting rods one, connecting rod two simultaneously, and connecting rod one, connecting rod two of same height establish through the hinge bar and rotate the connection, the tip that connecting rod one, connecting rod two deviate from the hinge bar is articulated with the tip of two rib poles that correspond respectively, and connecting rod one, connecting rod two, two rib poles and support bar of same height enclose into closed loop configuration, connecting rod one, connecting rod two to soft bag inside rotation have the rotation resistance.

Through the technical scheme, when the sprayer is in a back-carrying and placing state, a person can extrude the hinged rod towards the center of the soft bag by hand, the first connecting rod and the second connecting rod overcome rotation resistance to rotate, so that the end parts of the first connecting rod and the second connecting rod are close to the center of the soft bag, at the moment, each rib rod, the first connecting rod and the second connecting rod can conveniently rotate, when an object is impacted outside, the rib rods, the first connecting rod and the second connecting rod can rotate in a self-adaptive mode, so that the soft bag keeps the characteristics of softness and easy deformation, and the soft bag is not easy to collide with a wall and be clamped between branches when; when the soft bag is placed, the soft bag can adapt to the placing position through deformation, and the occupied space is reduced.

When water or solution needs to be filled into the soft bag, a person moves the hinge rod in the direction departing from the support strip by hand, and the connecting rod I and the connecting rod II overcome the rotation resistance and rotate to the position far away from the center of the soft bag. Under the resistance action generated by the first abutting surface and the second abutting surface, the first connecting rod and the second connecting rod are not easy to rotate towards the center direction of the soft bag, and at the moment, the hinge rod can also support each group of the first connecting rod and the second connecting rod. The hinge rod is matched with the support bar, and under the limiting action of the soft bag surface, the rib rod is in a stable horizontal state, at the moment, the hinge rod, the support bar and the rib rod form a support structure similar to a framework in the soft bag, and the soft bag is not prone to spontaneously deform. Then personnel place the soft bag on steady subaerial, can be to injecting liquid in the soft bag, at the in-process of injecting liquid, hinge bar, support bar, rib pole continuously play the supporting effect, and personnel need not to support the soft bag and also can accomplish the water injection, and the water injection process is comparatively convenient.

Preferably, the first connecting rod and the second connecting rod are made of plastics, a first abutting surface is arranged on the side wall of the end portion, facing the second connecting rod, of the first connecting rod, a second abutting surface is arranged on the side wall of the end portion, facing the first abutting surface, of the second connecting rod, the first abutting surface and the second abutting surface are located on the radial side of the hinge rod, and the first abutting surface abuts against the second abutting surface; when the first connecting rod and the second connecting rod rotate towards the interior of the soft bag, the first abutting surface extrudes through the edge and slides over the second abutting surface, and the first connecting rod and the second connecting rod form rotation resistance between the first abutting surface and the second abutting surface.

Through the technical scheme, when the first connecting rod and the second connecting rod rotate towards the inside of the soft bag, the first abutting surface extrudes through the edge and slides over the second abutting surface, and the first connecting rod and the second connecting rod form rotation resistance between the first abutting surface and the second abutting surface. The rotation resistance is set by using the elasticity of the plastic, so that the rotation resistance is convenient to implement.

Preferably, the outer wall of the hinge rod is fixed with a clamping ring, the clamping ring is arranged at intervals along the length direction of the hinge rod, and the adjacent clamping ring limits the first connecting rod and the second connecting rod between the first connecting rod and the second connecting rod.

Through the technical scheme, the clamping ring is used for preventing the separation of the first hinged connecting rod and the second hinged connecting rod.

Preferably, the support bars are hinged with the end parts of the rib rods through first hinge shafts, the rib rods are provided with first hinge holes for the first hinge shafts to penetrate through, the diameter of the first hinge holes is larger than that of the first hinge shafts, and the rib rods can swing in the vertical direction; the hinged rod comprises a plurality of segments, each segment corresponds to each pair of the first connecting rod and the second connecting rod, and the segments can be switched to be in two states of being disassembled and combined to form the whole hinged rod.

Through the technical scheme, when the sprayer is in a back-carrying and placing state, personnel can split each segment. The hinge rod loses its vertical support. Because the diameter of the first hinge hole is larger than that of the first hinge shaft, each rib rod can swing passively in the vertical direction, the soft bag is in a more deformable state, interference of the rib rods on the softness of the soft bag is further reduced in the state, and the softness function of the soft bag is further highlighted.

Preferably, the one end of segmentation is equipped with the slot, the segmented other end is equipped with the inserted block, the segmentation is pegged graft through inserted block and adjacent segmented slot, passes all segmentations simultaneously and is equipped with the tightening rope, the tightening rope is the rigidity rope, the lower extreme of tightening rope is fixed in the segmentation of bottom, the segmentation is equipped with the hole that tightens up that supplies the tightening rope to pass, the groove bottom of inserted block, slot is run through along segmented length direction to the hole that tightens up.

Through the technical scheme, when a person sends part of the length of the tightening rope outside the top subsection into the tightening hole, the tightening effect on each subsection is cancelled by the tightening rope, and each subsection can be separated. When the segments are required to be combined into the hinged rod, the tightening rope is pulled outwards with force, all the segments are restored to be in an end-to-end state under the limiting action of the tightening rope, and adjacent segments are automatically connected through the end parts through the slots and the insertion blocks. When the tightening rope tightens up to the shortest state, personnel's accessible is tied a knot or the mode of elasticity knot prevents to tighten up the rope and slides in tightening up downtheholely, and the articulated mast can keep comparatively stable integrative state this moment.

Preferably, the tightening rope above the top section is provided with a buckle, and the buckle is in a spring buckle type.

Through above-mentioned technical scheme, the elasticity is detained and can be directly purchased and use, and convenient to use, satisfy the operation requirement that the locking was tightened up the rope.

Preferably, the shape of the insertion block is hemispherical, and the shape of the slot corresponds to that of the insertion block.

Through the technical scheme, when the adjacent segments are inserted through the insertion blocks and the slots, the hemispherical insertion blocks can generate a guiding effect, and after the segments rotate by any angle around the axis of the segments, the adjacent segments can still be reliably inserted.

Preferably, the upper end of the tightening rope penetrates out of the soft bag upwards, and the elastic buckle is located outside the soft bag.

Through the technical scheme, personnel can operate the tightening rope and the elastic buckle outside the soft bag to switch the split and combined states of the sections, and hands do not need to contact liquid medicine in the soft bag, so that the soft bag is sanitary.

Preferably, the support strip is made of plastic, and the support strip can be bent.

By the technical scheme, after a user carries the soft bag, the supporting strip can be attached to the arc line on the back of the user to be bent, so that the comfort level of the user carrying the soft bag is improved; under the limiting action of the bag body, the support strip can meet the application requirement of supporting the soft bag.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. the sprayer can form a supporting structure similar to a framework in the soft bag by arranging the hinge rod, the supporting strip and the rib rod, and has the advantage of convenient water injection;

2. the rib rod of the sprayer can rotate and swing and has the soft function of a soft bag;

3. when the person toggles the hinge rod, the liquid stirring device can also play a role in stirring liquid in the soft bag.

Drawings

FIG. 1 is a perspective view of an embodiment of a knapsack sprayer;

FIG. 2 is a half sectional view of a knapsack sprayer of the embodiment;

FIG. 3 is a block diagram of the support bar, hinge bar, and rib bar of the embodiment in a support state;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a cross-sectional view B-B of FIG. 3;

FIG. 6 is a first block diagram of the embodiment of the support bar, the hinge bar and the rib bar in an active state;

fig. 7 is a second structural view of the support bar, the hinge bar and the rib bar of the embodiment in an active state.

In the figure, 1, a soft bag; 2. a spray gun; 3. a drive mechanism; 11. a feed inlet; 12. screwing a cover; 31. a water pump; 32. a storage battery; 10. a harness; 13. an interlayer; 4. a supporting strip; 5. a hinged lever; 6. a rib bar; 41. a first hinge shaft; 61. a first hinge hole; 42. a hinge slot; 14. installing a sleeve; 7. a first connecting rod; 8. a second connecting rod; 71. a first abutting surface; 81. a second abutting surface; 51. a snap ring; 50. segmenting; 52. a slot; 53. inserting a block; 9. tightening the rope; 54. tightening the hole; 91. and (6) loosening and fastening.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the backpack sprayer disclosed by the invention comprises a soft bag 1 used as a liquid storage container, a spray gun 2 used for spraying, and a driving mechanism 3 used for driving liquid to be sprayed out from the spray gun 2, wherein a feed port 11 is arranged at the top of the soft bag 1, a screw cap 12 is arranged at the feed port 11, and a person switches the feed port 11 to be opened or closed by rotating the screw cap 12. The driving mechanism 3 is a water pump 31 and a storage battery 32 for supplying power to the water pump 31, the suction inlet of the water pump 31 is communicated with the inner bottom of the soft bag 1, and the discharge outlet of the water pump 31 is communicated with the inlet of the spray gun 2 through a hose. Two braces 10 for people to carry are fixed on one side of the soft bag 1, the water pump 31 and the storage battery 32 are also positioned in the soft bag 1, the cavities of the water pump 31 and the storage battery 32 are separated from the water storage cavity in the soft bag 1 by arranging an interlayer 13, and the interlayer 13 is made of plastic film and is impermeable.

The inner wall of the soft bag 1 is fixed with a support strip 4 and is provided with a hinge rod 5 along the vertical direction, the support strip 4 and the hinge rod 5 are respectively positioned at two opposite sides of the inner cavity of the soft bag 1, wherein the support strip 4 is positioned at one side of the inner wall of the soft bag 1 close to the braces 10, the hinge rod 5 is not fixed with the soft bag 1, and the hinge rod 5 can move. The supporting strip 4 is made of plastics, the supporting strip 4 is fixed on the inner wall of the soft bag 1 through glue adhesion, the thickness of the supporting strip 4 is set to be freely bendable, after a user carries the braces 10, the supporting strip 4 can be attached to the arc line of the back of the user to be bent, and the comfort level of the user carrying the soft bag 1 is improved.

Referring to fig. 2 and 3, two sides of the width of the support bar 4 are respectively hinged with a plurality of rib rods 6, the interior of the support bar 4 is hinged with the end parts of the rib rods 6 through a first hinge shaft 41, the length direction of the first hinge shaft 41 is along the length direction of the support bar 4, the first hinge shaft 41 is a bendable plastic rod, and when the support bar 4 is bent, the first hinge shaft 41 bends along with the support bar 4. The rib rods 6 are also made of plastics and can generate a certain amount of elastic deformation when stressed; the rib 6 is curved in a circular arc forming an arc of about 120 degrees. The end part of the rib rod 6 is provided with a hinge hole one 61 for the hinge shaft one 41 to pass through, the diameter of the hinge hole one 61 is larger than that of the hinge shaft one 41, and the diameter of the hinge hole one 61 is preferably more than 1.5 times of that of the hinge shaft one 41. The side wall of the support bar 4 is provided with a hinge groove 42 for the end part of the rib rod 6 to enter, and the height of the hinge groove 42 is larger than the thickness of the rib rod 6 along the vertical direction; the rib 6 can swing in the vertical direction while the rib 6 can rotate about the first hinge shaft 41.

The rib rods 6 are arranged at intervals along the length direction of the supporting bar 4, and two rib rods 6 at the same height are arranged symmetrically relative to the supporting bar 4; the rib rods 6 are curved along the inner wall of the soft bag 1 in an arc shape, and the rib rods 6 penetrate through the inner wall of the soft bag 1 in a fixed mounting sleeve 14 mode, so that the rib rods 6 are fixed at a certain height of the inner wall of the soft bag 1.

The end parts of the rib rods 6 at the same height, which are far away from the supporting bar 4, are connected through the connecting rods I7 and II 8 arranged between the rib rods and the supporting bar, and the hinge rod 5 simultaneously penetrates through the end parts of all the connecting rods I7 and II 8. The first connecting rod 7 and the second connecting rod 8 at the same height are rotatably connected through the hinge rod 5, the end parts of the first connecting rod 7 and the second connecting rod 8, which are deviated from the hinge rod 5, are respectively hinged with the end parts of the two corresponding rib rods 6, and the first connecting rod 7, the second connecting rod 8, the two rib rods 6 and the support bar 4 at the same height enclose a closed annular structure.

Referring to fig. 3 and 4, the first connecting rod 7 and the second connecting rod 8 are made of plastic, the side wall of the end portion of the first connecting rod 7 facing the second connecting rod 8 is provided with a first abutting surface 71, the side wall of the end portion of the second connecting rod 8 facing the first abutting surface 71 is provided with a second abutting surface 81, the first abutting surface 71 and the second abutting surface 81 are located on the radial side of the hinge rod 5, and the first abutting surface 71 abuts against the second abutting surface 81. When the first connecting rod 7 and the second connecting rod 8 rotate towards the interior of the soft bag 1, the first abutting surface 71 is extruded by the edge and slides over the second abutting surface 81, and the first connecting rod 7 and the second connecting rod 8 form rotation resistance between the first abutting surface 71 and the second abutting surface 81.

Referring to fig. 4 and 5, the outer wall of the hinge rod 5 is integrally fixed with snap rings 51, the snap rings 51 are arranged at intervals along the length direction of the hinge rod 5, and each pair of the first and second hinged connecting

rods

7 and 8 is limited between the adjacent snap rings 51, so that the first and second hinged connecting

rods

7 and 8 are prevented from being separated. The hinge rod 5 includes a plurality of segments 50, each segment 50 corresponds to each pair of the first connecting rod 7 and the second connecting rod 8, and each segment 50 corresponds to two snap rings 51, and the snap rings 51 limit the separation of each pair of the first connecting rod 7 and the second connecting rod 8. The segments 50 can be inserted through the ends to switch between two states, i.e., the two states, in which the segments are separated and combined to form the whole hinge rod 5.

Referring to fig. 5 and 7, one end of the segment 50 is provided with a slot 52, the other end of the segment 50 is provided with an insertion block 53, and the segment 50 is inserted into the slot 52 of the adjacent segment 50 through the insertion block 53 to form positioning; the shape of the insertion block 53 is a hemisphere, and the shape of the insertion groove 52 corresponds to the insertion block 53. When the adjacent segments 50 are inserted through the insertion blocks 53 and the insertion slots 52, the hemispherical insertion blocks 53 can generate a guiding effect, and after the segments 50 rotate around the axis thereof by any angle, the adjacent segments 50 can still be reliably inserted. Meanwhile, the tightening ropes 9 penetrate through all the subsections 50, the tightening ropes 9 are rigid ropes, and the rigid ropes have the characteristic that the elasticity is negligible. The lower end of the tightening rope 9 is fixed on the bottom section 50, the section 50 is provided with a tightening hole 54 for the tightening rope 9 to pass through, the tightening hole 54 penetrates through the insertion block 53 and the groove bottom of the insertion groove 52 along the length direction of the section 50, and the tightening hole 54 is just positioned in the axial center of the section 50.

Referring to fig. 2, the upper end of the tightening rope 9 extends upwards out of the soft bag 1, the tightening rope 9 above the top section 50 is provided with an elastic buckle 91, the elastic buckle 91 is a spring buckle type, the elastic buckle 91 can be purchased from the market directly, and the elastic buckle 91 is located outside the soft bag 1.

The using method of the knapsack sprayer is as follows: referring to fig. 2 and 6, when the sprayer is in a back-carrying and placing state, a person can squeeze the hinged rod 5 towards the center direction of the soft bag 1 by hand, the first connecting rod 7 and the second connecting rod 8 rotate by overcoming the resistance of the first abutting surface 71 and the second abutting surface 81, so that the end parts of the first connecting rod 7 and the second connecting rod 8 are close to the center of the soft bag 1, at the moment, each rib rod 6, the first connecting rod 7 and the second connecting rod 8 can conveniently rotate, when an object is impacted outside, the rib rods 6, the first connecting rod 7 and the second connecting rod 8 can rotate in a self-adaptive manner, so that the soft bag 1 keeps the characteristics of softness and easy deformation, and the soft bag 1 is not easy to collide with a wall; when the soft bag 1 is placed, the placing position can be adapted through deformation, and the occupied space is reduced. When the person toggles the hinge rod 5, the liquid stirring device can also play a role in stirring liquid in the soft bag 1.

Referring to fig. 2 and 7, the person can also press the elastic buckle 91 to make a part of the length of the tightening rope 9 outside the soft bag 1 enter the soft bag 1, so that the tightening rope 9 cancels the tightening effect on each segment 50, and each segment 50 can be separated. At the moment, the hinged rod 5 loses the supporting function in the vertical direction, each rib rod 6 can generate self-adaptive swing in the vertical direction, so that the soft bag 1 is in a more deformable state, the interference of the rib rods 6 on the softness of the soft bag 1 is further reduced in the state, and the softness function of the soft bag 1 is further highlighted.

Referring to fig. 2 and 3, when water or solution needs to be poured into the soft bag 1, a person can press the elastic buckle 91, pull the tightening rope 9 outwards with force, under the limiting action of the tightening rope 9, all the segments 50 are restored to be in an end-to-end state, and the adjacent segments 50 are automatically inserted and positioned through the insertion blocks 53 and the insertion slots 52. When the tightening rope 9 is tightened up to the shortest state, the person sends the loosening and fastening button 91, the loosening and fastening button 91 clamps the tightening rope 9 tightly, the loosening and fastening button 91 compresses the bag surface of the soft bag 1 at the upper end of the hinge rod 5, and the hinge rod 5 can keep a stable integrated state at the moment. Then, the person moves the hinge rod 5 in the direction away from the support strip 4 by hand, the first connecting rod 7 and the second connecting rod 8 rotate to the positions far away from the center of the soft bag 1 by overcoming the resistance of the first abutting surface 71 and the second abutting surface 81, and the included angle between the first connecting rod 7 and the second connecting rod 8 in the length direction tends to zero.

A person places the soft bag 1 on the stable ground, the first connecting rod 7 and the second connecting rod 8 are not prone to spontaneously rotate towards the center direction of the soft bag 1 under the resistance action generated by the first abutting surface 71 and the second abutting surface 81, and the hinge rod 5 can also support each group of the first connecting rod 7 and the second connecting rod 8. The hinged rod 5 is matched with the supporting strip 4, under the limiting action of the bag surface in the soft bag 1, the rib rod 6 is in a stable horizontal state, at the moment, the hinged rod 5, the supporting strip 4 and the rib rod 6 form a supporting structure similar to a framework in the soft bag 1, and the soft bag 1 is not easy to spontaneously deform.

After the screw cap 12 is opened, liquid is injected into the soft bag 1 through the feed inlet 11, in the process of injecting the liquid, the hinge rod 5, the support bar 4 and the rib rod 6 continuously play a supporting effect, the personnel do not need to support the soft bag 1 and can complete water injection, and the water injection process is convenient.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a knapsack sprayer, includes soft bag (1) that is used as the stock solution container, is used for spray gun (2) of spraying, drives liquid from spray gun (2) spun actuating mechanism (3), soft bag (1) is equipped with feed inlet (11), characterized by: the inner wall of the soft bag (1) is fixed with support bars (4) and is provided with hinge rods (5) along the vertical direction, the support bars (4) and the hinge rods (5) are respectively positioned at two opposite sides of the inner cavity of the soft bag (1), two sides of the width of each support bar (4) are respectively hinged with a plurality of rib rods (6), the axial direction of each hinge shaft of each rib rod is along the length direction of each support bar (4), the rib rods (6) are arranged at intervals along the length direction of each support bar (4), and the two rib rods (6) at the same height are symmetrically arranged relative to the support bars (4);

the rib rods (6) are curved in an arc shape along the inner wall of the soft bag (1) and fixed on the inner wall of the soft bag (1), the end parts of the rib rods (6) at the same height deviating from the supporting bars (4) are connected through a connecting rod I (7) and a connecting rod II (8) arranged between the rib rods and the supporting bars, the hinged rod (5) penetrates through the end parts of the first connecting rod (7) and the second connecting rod (8) at the same height, the first connecting rod (7) and the second connecting rod (8) at the same height are rotatably connected through the hinged rod (5), the end parts of the first connecting rod (7) and the second connecting rod (8) departing from the hinge rod (5) are respectively hinged with the end parts of the two corresponding rib rods (6), the first connecting rod (7), the second connecting rod (8), the two rib rods (6) and the support bars (4) at the same height enclose a closed annular structure, the connecting rod I (7) and the connecting rod II (8) rotate towards the interior of the soft bag (1) and have rotation resistance;

the first connecting rod (7) and the second connecting rod (8) are made of plastics, a first abutting surface (71) is arranged on the side wall of the end portion, facing the second connecting rod (8), of the first connecting rod (7), a second abutting surface (81) is arranged on the side wall of the end portion, facing the first abutting surface (71), of the second connecting rod (8), the first abutting surface (71) and the second abutting surface (81) are located on the radial side of the hinged rod (5), and the first abutting surface (71) abuts against the second abutting surface (81); when the first connecting rod (7) and the second connecting rod (8) rotate towards the interior of the soft bag (1), the first abutting surface (71) is extruded through the edge and slides over the second abutting surface (81), and the first connecting rod (7) and the second connecting rod (8) form rotation resistance between the first abutting surface (71) and the second abutting surface (81).

2. The knapsack sprayer of claim 1, wherein: the outer wall of articulated arm (5) is fixed with snap ring (51), snap ring (51) set up along the length direction interval of articulated arm (5), and adjacent snap ring (51) are spacing connecting rod one (7), connecting rod two (8) between.

3. The knapsack sprayer of claim 2, wherein: the support bar (4) is hinged to the end part of the rib rod (6) through a first hinge shaft (41), the rib rod (6) is provided with a first hinge hole (61) for the first hinge shaft (41) to pass through, the diameter of the first hinge hole (61) is larger than that of the first hinge shaft (41), and the rib rod (6) can swing in the vertical direction; articulated pole (5) include a plurality of subsections (50), every subsection (50) corresponds every pair connecting rod one (7), connecting rod two (8) respectively, subsection (50) can switch the split, make up and form the holistic two kinds of states of articulated pole (5).

4. A knapsack sprayer according to claim 3 wherein: the one end of segmentation (50) is equipped with slot (52), the other end of segmentation (50) is equipped with inserted block (53), segmentation (50) are pegged graft through inserted block (53) and slot (52) of adjacent segmentation (50), pass all segmentation (50) simultaneously and are equipped with tightening rope (9), tightening rope (9) are the rigidity rope, the lower extreme of tightening rope (9) is fixed in segmentation (50) of bottom, segmentation (50) are equipped with the tightening hole (54) that supplies tightening rope (9) to pass, the groove bottom of inserted block (53), slot (52) is run through along the length direction of segmentation (50) in tightening hole (54).

5. The knapsack sprayer of claim 4, wherein: the tightening rope (9) above the subsection (50) at the top is provided with an elastic buckle (91), and the elastic buckle (91) is a spring buckle type.

6. The knapsack sprayer of claim 4, wherein: the shape of the insertion block (53) is hemispherical, and the shape of the insertion groove (52) corresponds to that of the insertion block (53).

7. The knapsack sprayer of claim 5, wherein: the upper end of the tightening rope (9) penetrates out of the soft bag (1) upwards, and the elastic buckle (91) is positioned outside the soft bag (1).

8. The knapsack sprayer of claim 1, wherein: the supporting strip (4) is made of plastic, and the supporting strip (4) can be bent.