Pest control device with variable pest control function

Abstract

The present invention relates to a pest control device having a variable pest control function, and provides a pest control device for controlling fruit trees grown in an orchard, comprising: a main body capable of driving and storing pest control chemicals; a fixed pest control nozzle fixedly provided on the main body to spray pest control chemicals to the side of the main body; and a rotatable pest control nozzle rotatably provided on the main body to spray pest control chemicals upward from the main body while unfolded or folded from the main body.

Description

Technology Field

[0001] The present invention relates to a pest control device having a variable pest control function, and more specifically, to a pest control device having a variable pest control function in which a pest control nozzle is rotated to control pests according to the shape of a fruit tree grown in an orchard. Background Technology

[0002] Generally, pest control equipment is used to spray pesticides to prevent diseases and pests on fruit trees planted in the orchards, and nutrients that can help with the growth of the fruit trees and the fruit.

[0003] Such pest control equipment often utilizes a speed sprayer (also known as an SS machine), and in this case, the work is carried out in a manner where an operator sits in the driver's seat and operates the speed sprayer while driving through the orchard and spraying chemicals from the rear of the speed sprayer.

[0004] In this regard, Korean Registered Utility Model No. 20-0476900 relates to an unmanned pest control device used in vinyl greenhouses, etc., comprising: a guide rail provided to extend in the front-rear direction and having supports at both ends; a chemical spraying unit slidably coupled to the guide rail and spraying a chemical liquid supplied by a supply pipe; a driving wheel and a driven wheel provided on the supports; a driving wire coupled to pass through the circumferential surfaces of the driving wheel and the driven wheel, with its middle portion connected to the chemical spraying unit; and a driving motor connected to the driving wheel to drive the driving wheel so that the driving wire circulates along the circumferential surfaces of the driving wheel and the driven wheel, wherein the driving wire is tightly coupled to the circumferential surfaces of the driving wheel and the driven wheel, having a contact portion wound around the circumferential surfaces of the driving wheel and the driven wheel and upper and lower connecting portions connecting the contact portion, the unmanned pest control device further comprises an auxiliary wheel provided on the supports to be positioned between the driving wheel and the guide rail, and the contact portion having both ends An unmanned pest control device is disclosed that is connected to the upper and lower connecting parts via the upper and lower circumferential surfaces of the auxiliary wheel after crossing each other in the upper and lower directions.

[0005] However, the pest control robot disclosed in the prior art literature has a disadvantage in that it is not suitable for controlling fruit trees of various shapes grown in orchards due to the limitation of the pest control area in which the nozzle in the pest control liquid spraying part sprays the pest control liquid only within a limited range in a certain direction. Prior art literature

[0006] Republic of Korea Registered Utility Model No. 20-0476900 The problem to be solved

[0007] Accordingly, the present invention was devised to solve the problems of the prior art as described above, and aims to provide a pest control device having a variable pest control function that can control all fruit trees regardless of their shape and improve pest control efficiency by rotating the pest control nozzle to unfold or fold it according to the shape of the fruit tree grown in the orchard. means of solving the problem

[0008] A pest control device having a variable pest control function according to the present invention for achieving the above-mentioned purpose is a pest control device for controlling fruit trees cultivated in an orchard, and is characterized by comprising: a main body capable of driving and storing pest control chemicals; a fixed pest control nozzle fixedly provided on the main body to spray pest control chemicals to the side of the main body; and a rotatable pest control nozzle rotatably provided on the main body to spray pest control chemicals upward from the main body while unfolded or folded from the main body.

[0009] In addition, the rotary pest control nozzle may include a nozzle stand hinged to each side of the main body; a plurality of branch pipes protruding at regular intervals from each nozzle stand to supply pest control chemicals through the nozzle stand; and a spray nozzle provided at each branch pipe to spray pest control chemicals.

[0010] In addition, the nozzle assembly is provided with a plurality of hinge covers that protrude toward each branch pipe while communicating with the nozzle assembly, and each branch pipe is provided with a hinge pin and a plurality of rotation pins, one end of which is connected and fixed to communicate with the respective branch pipe and the other end of which is connected to each hinge cover so as to be rotatable relative to each other, and a fixing plate and a plurality of rotation plates are provided that are connected and fixed to the hinge pin and the plurality of rotation pins respectively, and the fixing plate and the plurality of rotation plates are provided with a plurality of support links, the ends of which are hinge-connected to adjacent plates respectively, so that when the nozzle assembly is unfolded, the injection angle of each branch pipe, which rotates together with the nozzle assembly, can be rotated relative to the nozzle assembly so as to face upward.

[0011] In addition, the main body may be provided with a plurality of support grooves formed by bending with a curvature corresponding to the rotation radius of the nozzle base, into which the rotation pin of the branch pipe is inserted. Effects of the invention

[0012] According to the pest control device having a variable pest control function of the present invention, pest control work can be performed by rotating the rotary pest control nozzle so that it is unfolded or folded toward the surface of the pest control device according to the shape of the fruit tree grown in the orchard, thereby enabling pest control on all fruit trees regardless of the shape and improving the pest control efficiency of the fruit tree. Brief explanation of the drawing

[0013] FIG. 1 is an overall configuration diagram of a pest control device according to the present invention. FIG. 2 is an exploded view showing the pest control unit configured in the pest control device according to the present invention from the front. FIG. 3 is an exploded view of the pest control unit according to the present invention shown from the rear. FIG. 4 is a drawing of a rotary pest control nozzle configured in a pest control unit according to the present invention in an unfolded state. FIG. 5 is a drawing of a rotary pest control nozzle according to the present invention in a folded state. FIG. 6 is an exploded view of a rotary pest control nozzle according to the present invention. FIG. 7 is an enlarged view of a rotary pest control nozzle according to the present invention in an unfolded state. FIG. 8 is an enlarged view of a rotary pest control nozzle according to the present invention in a folded state. FIG. 9 is a diagram showing a comparison of the spray angle of the spray nozzle when the rotary pest control nozzle according to the present invention is unfolded, where FIG. 9 (a) is an operational diagram showing the spray angle of the spray nozzle when there is no support link, and FIG. 9 (b) is an operational diagram showing the state in which the spray angle of the spray nozzle is adjusted upward by the support link. FIG. 10 is an operation diagram showing the rotary pest control nozzle of the pest control device according to the present invention in a folded state. FIG. 11 is an operation diagram showing the rotary pest control nozzle of the pest control device according to the present invention in an unfolded state for pest control. Specific details for implementing the invention

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0015] The terms used in this invention are defined in consideration of their functions within the invention; however, since these may vary depending on the intentions or practices of the user or operator, the definitions of these terms should be interpreted in a sense and concept consistent with the technical details of this invention.

[0016] In addition, the embodiments of the present invention are not intended to limit the scope of the rights of the present invention, but are merely exemplary matters of the components presented in the claims of the present invention, and are embodiments that include components that are included in the technical concept throughout the specification of the present invention and can be substituted as equivalents for the components of the claims.

[0017] Additionally, optional terms in the following examples are used to distinguish one component from another, and the components are not limited by said terms.

[0018] Accordingly, in describing the present invention, detailed descriptions of related prior art that may unnecessarily obscure the essence of the invention are omitted.

[0019] The attached drawings, FIGS. 1 to 11, are drawings illustrating a pest control device having a variable pest control function according to the present invention, a pest control unit configured therein, and an operating state.

[0020] The pest control device (100) according to the present invention is a device for controlling fruit trees grown in an orchard, as shown in the drawing.

[0021] As shown in FIG. 1, this pest control device (100) includes a main body (110) capable of self-propelled driving by means of crawler-like driving wheels (120) on both sides, and the main body (110) is equipped with a pest control agent stored therein.

[0022] A bumper guard (130) is provided on the front of the main body (110) to protrude forward to protect the main body (110) from collision, and a pest control unit (200) is configured on the rear of the main body (110) to control fruit trees.

[0023] As shown in FIGS. 2 and 3, the pest control unit (200) includes a plurality of fixed pest control nozzles (220) that are fixedly provided on both sides of the main body (110) to spray pest control chemicals to the sides of the main body (110), a rotatable pest control nozzle (230) that is rotatably provided on each side of the upper part of the main body (110) to spray pest control chemicals upward from the main body (110) while rotating from the main body (110) to spread outward or folded from the main body (110), and a blower fan (210) that is provided at the rear of the pest control nozzles (220) (230) to widely spray pest control chemicals sprayed from both pest control nozzles (220) (230).

[0024] Since the fixed spray nozzle (220) and the rotary spray nozzle (230) are each equipped with a spray nozzle, and both spray nozzles are configured identically, the description of the fixed spray nozzle (220) will be replaced by the description of the spray nozzle (280) to be described in the rotary spray nozzle (230) to be described later.

[0025] In particular, the fixed spray nozzle (220) is fixedly provided on both sides of the main body (110) to spray the stem portion of the fruit tree, and the rotary spray nozzle (230) is rotatably provided on the upper part of the main body (110) to spray the branch portion by rotating according to the shape of the branches extending in various directions from the stem, i.e., the tree shape, thereby maximizing the spraying efficiency of the spraying device (100).

[0026] These fixed pest control nozzles (220) and rotary pest control nozzles (230) are provided on the same circumferential surface of the main body (110), and the blower fan (210) sprays pest control chemicals sprayed from the rear of the pest control nozzles (220) (230) by widely scattering them backward.

[0027] And, at the rear of the blower fan (210), a grill is provided to cover the blower fan (210) and protect the blower fan (210) from foreign matter.

[0028] Meanwhile, the rotary pest control nozzle (230) is configured to rotate on the circumferential surface of the main body (110) as shown in FIGS. 4 and 5 and to spread outward or fold into the circumferential surface of the main body (110).

[0029] As shown in FIGS. 6 to 9, this rotary pest control nozzle (230) includes a nozzle stand (240) hinged to each side of the upper part of the main body (110), a plurality of branch pipes (270) (271) (272) (273) protruding at regular intervals from both nozzle stands (240) to supply pest control chemicals through the nozzle stands (240), and a spray nozzle (280) provided in each branch pipe (270) (271) (272) (273) to spray pest control chemicals outward.

[0030] The nozzle assembly (240) is a hollow pipe formed by bending it to a curvature corresponding to the circumference of the main body (110), and the pest control agent stored in the main body (110) is supplied to each spray nozzle (280) through the nozzle assembly (240), and a supply pump (not shown) for pumping the pest control agent to the nozzle assembly (240) is provided between the nozzle assembly (240) and the main body (110).

[0031] And, the lower end of the nozzle holder (240), that is, the lower end located close to the side of the main body (110), is provided with a hinge portion that is hinge-connected to the main body (110), and the hinge portion is provided with a swivel structure on the main body (110) so that the nozzle holder (240) can rotate smoothly on the main body (110).

[0032] That is, as shown in cross-section in FIGS. 6 to 8, the swivel structure in this embodiment is provided with a first hinge cover (242) in the shape of a cap that is fixedly coupled to the lower end of the nozzle head (240), and the corresponding first branch pipe (270) is provided with a hinge pin (250) in which one end is fixedly screw-coupled to the first branch pipe (270) and the other end is rotatably coupled to the first hinge cover (242) via a bearing.

[0033] At this time, the first hinge cover (242) is provided with a hollow that communicates with the nozzle base (240) and the hinge pin (250), and the corresponding first branch pipe (270) and the hinge pin (250) coupled thereto are also provided with a hollow, so that the pest control agent of the main body (110) is supplied through the nozzle base (240) to the first hinge cover (242), the corresponding hinge pin (250), and the first branch pipe (270), and is sprayed through the corresponding spray nozzle (280) provided in the first branch pipe (270).

[0034] And, the nozzle base (240) on the upper side of the hinge part is provided with second to fourth hinge covers (243)(244)(245) having the same structure as the first branch pipe (270) and the first hinge cover (242) described above, and corresponding second to fourth branch pipes (271)(272)(273).

[0035] That is, the nozzle base (240) on the upper side of the first hinge cover (242) is provided with second to fourth hinge covers (243)(244)(245) at regular intervals, and each of the corresponding hinge covers (243)(244)(245) is provided with second to fourth branch pipes (271)(272)(273) that are rotatably coupled to each other via a rotation pin (251)(252)(253).

[0036] At this time, each rotation pin (251)(252)(253) is connected to each branch pipe (271)(272)(273) and each hinge cover (243)(244)(245) so as to be rotatable relative to each other, with the same structure as the hinge pin (250).

[0037] Meanwhile, the second to fourth branch pipes (271)(272)(273) provided as described above are rotated upward around the first branch pipe (270) as an axis when the nozzle stand (240) is rotated upward, and the second to fourth branch pipes (271)(272)(273) are each rotated in place in the opposite direction to the rotation direction of the nozzle stand (240) from the nozzle stand (240), thereby adjusting the angle so that the spraying direction of the spray nozzle (280) is directed upward (more precisely, side-upward).

[0038] To this end, a fixing plate (254) is axially coupled and fixed to the hinge pin (250) of the nozzle stand (240), and the fixing plate (254) is screw-coupled and fixed to the main body (110).

[0039] The fixing plate (254) is provided so that a hinge pin (250) is fixed by being connected through a connecting fixing member (254a) in the central part thereof. A flat portion (250a) is formed on the hinge pin (250) from a threaded end portion to one side of the outer surface, and a flat surface corresponding to the flat portion (250a) of the hinge pin (250) is formed on the inner surface of the connecting fixing member (254a) of the fixing plate (254).

[0040] Thus, when the nozzle assembly (240) rotates, the first hinge cover (242) rotates together with the nozzle assembly (240) around the hinge pin (250) as an axis, but the first branch pipe (270) and the hinge pin (250) are kept in a fixed state by the fixing plate (254) which is coupled and fixed to the main body (110).

[0041] And, each rotating pin (251)(252)(253) of the second to fourth branch pipes (271)(272)(273) has a rotating plate (255)(256)(257) axially connected and fixed thereto. In each rotating pin (251)(252)(253), a flat portion (251a)(252a)(253a) is formed from one end to one side of the outer surface, similar to the hinge pin (250). In the connecting fixing member (255a)(256a)(257a) of the rotating plate (255)(256)(257) corresponding thereto, a flat surface is formed on the inner surface corresponding to the flat portion (251a)(252a)(253a) of the rotating pin (251)(252)(253).

[0042] Thus, when the nozzle assembly (240) rotates, the second to fourth hinge covers (243)(244)(245) rotate together with the nozzle assembly (240), and the second to fourth branch pipes (271)(272)(273) also rotate together with the nozzle assembly (240). However, at this time, the second to fourth branch pipes (271)(272)(273) can be rotated in the direction opposite to the rotation direction of the nozzle assembly (240) from the second to fourth hinge covers (243)(244)(245) by means of the respective rotation pins (251)(252)(253), and this is achieved by the respective support links (260)(261)(262) to be described later.

[0043] That is, between the fixed plate (254) and the third rotating plate (257), first to third support links (260) (261) (262) connecting adjacent plates are provided, and each end of each support link (260) (261) (262) is hinge-connected to adjacent plates. Thus, when the nozzle stand (240) is unfolded by the first to third support links (260) (261) (262), each branch pipe (271) (272) (273) that rotates together with the nozzle stand (240) is rotated in reverse, that is, relative, so that the spray angle of each branch pipe (271) (272) (273) is directed upward.

[0044] These first to third support links (260)(261)(262) have the effect of preventing the second to fourth branch pipes (271)(272)(273), which rotate upward along with the nozzle (240), from rotating in place (rotation in the forward direction) in the same direction as the rotation of the nozzle (240) when the nozzle (240) is folded on the main body (110) and then rotated upward and unfolded. This results in the second to fourth branch pipes (271)(272)(273) maintaining the injection angle of the second to fourth branch pipes (271)(272)(273) so that the injection angle of the second to fourth branch pipes (271)(272)(273) is directed upward.

[0045] This is because, as can be seen in the comparative drawings of FIG. 9 (a) and (b), in the absence of the support links (260)(261)(262), in FIG. 9 (a), the second to fourth branch pipes (271)(272)(273) are constrained to the nozzle stand (240) and rotate and unfold together with the nozzle stand (240), causing the injection angle of each branch pipe (271)(272)(273) to rotate approximately 90 degrees and face sideways. In contrast, in FIG. 9 (b), when the nozzle stand (240) rotates upward, the second to fourth branch pipes (271)(272)(273) are blocked from rotating in place in the forward direction by each support link (260)(261)(262), resulting in the effect of rotating in reverse in place. Therefore, the injection angle of the second to fourth branch pipes (271)(272)(273) It becomes possible to maintain an upward position as much as possible.

[0046] In addition, as shown in FIG. 6, a plurality of hinge holes (255b-1) (255b-2) are formed at regular intervals on the outer periphery of the first rotating plate (255), and the upper end of the first support link (260) is hinge-connected to one hinge hole (255b-1), and the lower end of the second support link (261) is hinge-connected to the other hinge hole (255b-2).

[0047] And, a hinge hole (256b) (257b) is formed on the outer periphery of each of the second rotating plate (256) and the third rotating plate (257), and the upper end of the second support link (261) and the lower end of the third support link (262) are connected coaxially and hinge-coupled to the hinge hole (256b) of the second rotating plate (256), and the upper end of the third support link (262) is hinge-coupled to the hinge hole (257b) of the third rotating plate (257).

[0048] At this time, a plurality of hinge holes (255b-1) (255b-2) are formed at regular intervals on the first rotating plate (255) so that when the nozzle stand (240) is folded against the main body (110) and then rotated upward to unfold, the spray angles of the third branch pipe (272) and the fourth branch pipe (273) are maintained so that they are directed as far upward as possible.

[0049] That is, when the upper end of the first support link (260) and the lower end of the second support link (261) are hinged together at the hinge hole (255b-1) on one side of the second branch pipe (271), when the nozzle stand (240) is rotated upward from the main body (110) and unfolded, the third branch pipe (272) and the fourth branch pipe (273) are pulled toward the second branch pipe (271) by the second support link (261), so there is a problem that the spray angle of the third branch pipe (272) and the fourth branch pipe (273) in the unfolded nozzle stand (240) is directed sideways.

[0050] Accordingly, by hinge-connecting the first support link (260) and the second support link (261) to each hinge hole (255b-1) (255b-2) of the first rotating plate (255), the third branch pipe (272) and the fourth branch pipe (273) can be minimized from being pulled toward the second branch pipe (271) and rotated when the nozzle stand (240) is extended upward toward the main body (110), and accordingly, the injection angle of the third branch pipe (272) and the fourth branch pipe (273) can be maintained in a state facing upward as much as possible.

[0051] And, by means of a plurality of hinge covers (242)(243)(244)(245) provided between the nozzle base (240) and each support link (260)(261)(262), the nozzle base (240) and each support link (260)(261)(262) can be maintained in a parallel state.

[0052] Meanwhile, the branch pipes (270)(271)(272)(273) are hollow pipes protruding rearward from the nozzle stand (240) and receive pest control chemicals through the nozzle stand (240). Each branch pipe (270)(271)(272)(273) is equipped with a spray nozzle (280) that sprays pest control chemicals to the outside of the main body (110), and it is preferable to provide more than a number of such spray nozzles (280) to increase the pest control effect.

[0053] And, each branch pipe (270)(271)(272)(273) connected to the nozzle stand (240) in a cantilevered manner is supported by each support link (260)(261)(262) between the nozzle stand (240), thereby reinforcing the stress against bending acting on the joint between the nozzle stand (240) and each branch pipe (270)(271)(272)(273).

[0054] In addition, as shown in FIGS. 7 and 8, a plurality of support grooves (111) are formed on the rear circumferential surface of the main body (110) corresponding to the second to fourth branch pipes (271)(272)(273) as described above, into which the rotating pins (251)(252)(253) of each branch pipe (271)(272)(273) are inserted and seated. The plurality of support grooves (111) are formed to have an inner diameter corresponding to the outer diameter of the rotating pins (251)(252)(253) and are also formed by bending as a curvature according to the rotation of the nozzle base (240).

[0055] Thus, the rotating pins (251)(252)(253) of the second to fourth branch pipes (271)(272)(273), which rotate together with the nozzle base (240), are inserted and coupled into the support groove (111) of the main body (110) with minimal clearance, thereby offsetting the reaction force acting on the spray nozzle (280) and the nozzle base (240) when spraying pesticide through the spray nozzle (280), thereby minimizing the flow caused by recoil.

[0056] And, both nozzle stands (240) are provided to be rotated by a driving means, and the driving means may be provided as hydraulic cylinders installed on each of the two nozzle stands (240).

[0057] This hydraulic cylinder includes a cylinder body (290) with its lower end hinged to a main body (110), and a piston rod (291) that moves in and out of the cylinder body (290) upward and has its upper end hinged to an operating bar (241) of a nozzle base (240).

[0058] Both hydraulic cylinders of this type are configured to operate simultaneously by the control logic of a control unit (not shown).

[0059] Meanwhile, in this embodiment, a hydraulic cylinder is provided by directly connecting each nozzle assembly (240) to each nozzle assembly (240) as an example; however, alternatively, the two nozzle assembly (240) may be configured to operate simultaneously by means of a single hydraulic cylinder and a linkage means, or a chain and a sprocket or a gear means.

[0060] The operational relationship of the pest control device having a variable pest control function according to the present invention as described above is explained.

[0061] The pest control device (100) of the present invention moves autonomously between fruit trees by means of the driving wheel (120) of the main body (110) to control both fruit trees.

[0062] At this time, if the fruit tree to be controlled is a pear tree shape such as a Y-shape, radial shape, or goblet shape as in FIG. 10, the rotary control nozzle (230) is rotated toward the main body (110) and inserted into the support groove (111) of the main body (110) and sprays the control agent upward toward the main body (110), and the fixed control nozzle (220) sprays the control agent to the side toward the main body (110).

[0063] And, when the fruit tree to be controlled is an apple tree with a multi-axis or slender spindle shape as shown in FIG. 11, the rotary control nozzle (230) is rotated outward from the main body (110) by a hydraulic cylinder and spreads outward and stands upright on the upper part of the main body (110), and then sprays the control agent to the side and upper side of the main body (110) (approximately 10 o'clock to 11 o'clock direction and 1 o'clock to 2 o'clock direction), and the fixed control nozzle (220) sprays the control agent to the side of the main body (110).

[0064] In addition, the pesticide sprayed from each pesticide nozzle (220) (230) is widely dispersed into the air by the rear blower fan (210), allowing for pest control of fruit trees over a wide area.

[0065] Accordingly, the pest control device (100) of the present invention is equipped with a fixed pest control nozzle (220) and a rotary pest control nozzle (230) that rotates according to the shape of the fruit tree, so that all fruit trees in the orchard can be controlled, thereby improving pest control efficiency.

[0066] Although the present invention has been described in detail through specific embodiments, this is for the purpose of specifically explaining the invention, and the invention is not limited thereto. It is evident that modifications or improvements can be made by those skilled in the art within the technical scope of the invention.

[0067] All simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims. Explanation of the symbols

[0068] 100 : Pest control device 110 : Main body 111 : Support Home 120 : Driving Wheel 130 : Bumper Guard 200 : Pest Control Unit 210 : Blower fan 220 : Fixed pest control nozzle 230 : Rotary spray nozzle 240 : Nozzle holder 241 : Operating bar 242,~,245 : Hinge cover 250 : Hinge pin 250a : Flat part 251, 252, 253 : Rotating pins 251a, 252a, 253a : Flat part 254 : Fixing plate 254a : Connecting fixing device 254b : Hinge hole 255, 256, 257 : Rotating plate 255a, 256a, 257a: Connecting fixture 255b-1, 255b-2, 256b, 257b : Hinge holes 260, 261, 262 : Support links 270,~,273 : Branch pipe 280 : Spray nozzle 290: Cylinder body 291: Piston rod

Claims

Claim 1 A pest control device for controlling fruit trees cultivated in an orchard, comprising: a main body capable of driving and storing pest control chemicals; a fixed pest control nozzle fixedly mounted on the main body and spraying pest control chemicals to the side of the main body; and a rotary pest control nozzle rotatably mounted on the main body and spraying pest control chemicals upward from the main body while unfolded or folded from the main body; wherein the rotary pest control nozzle comprises nozzle arms hinged to each side of the main body; and a plurality of branch pipes protruding at regular intervals from each nozzle arm to supply pest control chemicals through the nozzle arm. A pest control device comprising: a spray nozzle provided at each branch pipe for spraying pest control chemicals; wherein the nozzle assembly is provided with a plurality of hinge covers that protrude toward each branch pipe while communicating with the nozzle assembly; each branch pipe is provided with a hinge pin and a plurality of rotating pins, one end of which is connected and fixed to communicate with the respective branch pipe and the other end of which is connected to each hinge cover so as to be rotatable relative to it; a fixing plate and a plurality of rotating plates are provided, each connected and fixed to the hinge pin and the plurality of rotating pins; and the fixing plate and the plurality of rotating plates are provided with a plurality of support links, both ends of which are hinge-connected to adjacent plates, so as to rotate relative to each branch pipe so that the spray angle of each branch pipe, which rotates together with the nozzle assembly when the nozzle assembly is unfolded, is directed upward. Claim 2 delete Claim 3 delete Claim 4 A pest control device according to claim 1, wherein the main body is provided with a plurality of support grooves formed by bending with a curvature corresponding to the rotation radius of the nozzle base, into which a rotation pin of the branch pipe is inserted.

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