A lettuce defoliation device

Abstract

This utility model relates to a lettuce defoliation device, comprising a gripping unit, a first support unit, a second support unit, a height adjustment unit, and a defoliation unit. Its advantages are: the first and second support units are rotatably connected, allowing for angle adjustment to suit different users and improving worker comfort; the height adjustment unit is connected to both the second support unit and the defoliation unit, allowing the defoliation unit to be pushed forward to defoliate the lettuce by adjusting its height; during defoliation, workers only need to align the defoliation unit with the lettuce, eliminating the need for force, thus saving labor, increasing efficiency, and reducing the risk of injury due to the high friction between the hand and the gripping unit, preventing relative slippage.

Description

Technical Field

[0001] This utility model relates to the field of lettuce harvesting technology, and in particular to a lettuce defoliation device. Background Technology

[0002] Lettuce, a popular leafy vegetable, is rich in nutrients and is widely cultivated and consumed globally. During the lettuce harvesting process, defoliation is a crucial step; the efficiency and quality of defoliation directly affect the harvesting efficiency and the quality of the lettuce.

[0003] Currently, in many lettuce production operations, especially in small and medium-sized farms or manual harvesting, lettuce defoliation mainly relies on manual labor. Existing defoliation tools are relatively simple in structure, typically designed as a hollow cylindrical structure or a roughly annular working part connected to the end of a rod. During operation, workers need to firmly grasp the tool, place it over the top of the lettuce, and then apply downward pressure or a twisting motion, using the inner edge of the cylinder or the edge of the annular structure to peel, cut, or scrape off the outer leaves of the lettuce.

[0004] First, the current defoliation work is labor-intensive and easily leads to fatigue. Operators need to hold the defoliation tool continuously and apply considerable force to effectively remove the outer leaves of lettuce. Repeating this action for a long time places high demands on the worker's arm strength, wrist strength, and grip strength, which can easily lead to operator fatigue and affect work endurance.

[0005] Secondly, the existing leaf removal operation has safety hazards and is prone to injuring fingers. During the application of force, due to the simple structure of the tool, the operator needs to make constant lifting and force-applying movements. The repeated friction between the hand and the tool causes wear and blistering, which poses certain safety hazards and causes discomfort to the workers.

[0006] In addition, the existing defoliation equipment is inefficient. The defoliation process for each lettuce plant requires a certain amount of operation time and physical effort, and the workers' defoliation speed will gradually decrease, resulting in low overall defoliation efficiency.

[0007] There are currently no effective solutions to the problems of high labor intensity, safety hazards, and low efficiency in defoliation work in related technologies. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a lettuce defoliation device to solve problems such as high labor intensity, safety hazards, and low efficiency in defoliation.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A lettuce defoliation device, comprising:

[0011] Grip unit for gripping;

[0012] A first support unit, wherein a first end of the first support unit is connected to an end of the gripping unit;

[0013] A second support unit is rotatably disposed at the second end of the first support unit;

[0014] A height adjustment unit is disposed on the second support unit;

[0015] A defoliation unit is movably disposed at the bottom end of the second support unit and connected to the height adjustment unit. It is used to reciprocate vertically under the action of the height adjustment unit to defoliate the lettuce.

[0016] In some embodiments, the gripping unit includes:

[0017] A gripping element, the end of which is connected to the first end of the first support unit for gripping;

[0018] An anti-slip element is disposed on the outer edge surface of the gripping element for preventing slippage.

[0019] In some embodiments, the first support unit includes:

[0020] A first lateral support element, the first end of which is connected to the end of the gripping unit;

[0021] A first rotating element is disposed at the second end of the first transverse support element and is rotatably connected to the second support unit;

[0022] A first locking element is disposed at the end of the first rotating element and is removably locked to the second support unit, for cooperating with the second support unit to lock the relative position of the second support unit and the first support unit.

[0023] In some embodiments, the second support unit includes:

[0024] A support plate element is rotatably disposed at the second end of the first support unit. The support plate element is provided with the height adjustment unit, and the leaf removal unit is movably disposed at the bottom end of the support plate element.

[0025] An inclined support element, the bottom end of which is connected to the support plate element;

[0026] The second rotating element is disposed at the top of the inclined support element and is rotatably connected to the first support unit, and is used to adjust the relative position of the support plate element and the first support unit.

[0027] A second locking element is disposed on the outer edge surface of the second rotating element;

[0028] A third locking element is removably locked to the second locking element and the first support unit, respectively, for defining the relative position of the support plate element and the first support unit.

[0029] In some embodiments, the height adjustment unit includes:

[0030] A first longitudinal support element, the top end of which is connected to the bottom end of the second support unit;

[0031] The second longitudinal support element is slidably connected to the first longitudinal support element, and the bottom end of the second longitudinal support element is connected to the leaf removal unit.

[0032] A driving element is disposed at the top of the second support unit and connected to the second longitudinal support element, for driving the second longitudinal support element to reciprocate along the axial direction of the first longitudinal support element to adjust the distance between the leaf removal unit and the second support unit.

[0033] In some of these embodiments, it also includes:

[0034] A length adjustment unit, the second end of which is rotatably connected to the first support unit, is used to adjust the position of the first support unit;

[0035] A fixing unit, the side of which is connected to the first end of the length adjustment unit, is used to removably wear on the worker's waist to fix the length adjustment unit to the worker's waist.

[0036] In some embodiments, the first support unit further includes:

[0037] The third rotating element is disposed on the side of the first support unit and is rotatably connected to the second end of the length adjustment unit.

[0038] In some embodiments, the length adjustment unit includes:

[0039] A second lateral support element is rotatably disposed on the side of the first support unit;

[0040] The fourth rotating element is disposed at the second end of the second transverse support element and is rotatably connected to the first support unit;

[0041] A first sliding element is disposed on the second transverse support element;

[0042] A third lateral support element is disposed between the first support unit and the fixed unit, and is slidably connected to the second lateral support element;

[0043] A second sliding element is disposed on the third transverse support element and is slidably connected to the first sliding element;

[0044] A first connecting element is sleeved on the second end of the third lateral support element, and the second lateral support element is also sleeved on it.

[0045] A first pressing element is rotatably disposed on the side of the first connecting element;

[0046] The second pressing element is movably disposed at the bottom end of the first pressing element and located at the first sliding element, and is movably connected to the first connecting element. It is used to press the second pressing element against the third transverse support element by rotating the first pressing element to prevent the second transverse support element from moving relative to the third transverse support element.

[0047] A first base element is disposed on the side of the third transverse support element;

[0048] A plurality of second connecting elements are distributed on the first base element and are respectively connected to the fixing unit.

[0049] In some embodiments, the fixing unit includes:

[0050] A strap element, disposed on the side of the length adjustment unit, is used to removably secure to the worker's waist;

[0051] A second base element is disposed on the side of the binding element;

[0052] A plurality of third connecting elements are distributed on the second base element and are respectively connected to the length adjustment unit for fixing the length adjustment unit;

[0053] A fourth connecting element is disposed on the side of the first end of the strap element;

[0054] A fifth connecting element is disposed on the side of the second end of the strap element and is detachably connected to the fourth connecting element for fixing the strap element to the worker's waist.

[0055] In some of these embodiments, it also includes:

[0056] At least one movable unit is disposed between the second support unit and the leaf removal unit, and is used to reciprocate along the axial direction of the height adjustment unit under the action of the leaf removal unit to stabilize the leaf removal unit.

[0057] In some embodiments, the active unit includes:

[0058] The third longitudinal support element, the top end of which is connected to the bottom end of the second support unit;

[0059] A first limiting element is disposed at the bottom end of the third longitudinal support element;

[0060] A fourth longitudinal support element is slidably connected to the third longitudinal support element, and the bottom end of the fourth longitudinal support element is connected to the leaf removal unit, which is used to reciprocate under the action of the leaf removal unit to stabilize the leaf removal unit.

[0061] The second limiting element is disposed at the top of the fourth longitudinal support element and is limitedly connected to the first limiting element to prevent the fourth longitudinal support element from separating from the third longitudinal support element.

[0062] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0063] The device utilizes a rotating connection between the first and second support units, allowing for angle adjustment to suit different users and improve worker comfort. A height adjustment unit connects to both the second support unit and the leaf-removing unit, allowing the leaf-removing unit to be pushed forward to remove leaves from the lettuce by adjusting the height of the adjustment unit. During leaf removal, workers only need to align the leaf-removing unit with the lettuce; no force is required, saving labor and increasing efficiency. Furthermore, the high friction between the hand and the grip unit prevents slippage, reducing the risk of injury and solving the problems of high labor intensity, safety hazards, and low efficiency in leaf removal. A strap unit secures the lettuce leaf-removing device to the worker's waist, allowing the body to share the weight of the lettuce. The weight of the lettuce defoliation device frees up the workers' hands and improves their comfort. The length adjustment unit, rotatably connected to the first support unit, allows for adjustment of the distance between the defoliation unit and the body, expanding the defoliation range and improving efficiency. It is also flexible and convenient to use. By setting the rotation point at the top of the length adjustment unit, workers can easily defoliate the lettuce by simply rotating the grip unit, saving effort and further solving the problem of low defoliation efficiency. The movable unit and the defoliation unit reciprocate together under the action of the height adjustment unit, stabilizing the defoliation unit, improving defoliation quality, extending its service life, and assisting in defoliation of the lettuce, thus improving defoliation efficiency. Attached Figure Description

[0064] Figure 1 This is a schematic diagram (a) of a lettuce defoliation device according to an embodiment of the present utility model;

[0065] Figure 2 This is a schematic diagram of the gripping unit according to an embodiment of the present utility model;

[0066] Figure 3 This is a schematic diagram (a) of the first support unit according to an embodiment of the present utility model;

[0067] Figure 4 This is a schematic diagram of the second support unit according to an embodiment of the present utility model;

[0068] Figure 5 This is a schematic diagram of a height adjustment unit according to an embodiment of the present utility model;

[0069] Figure 6 This is a schematic diagram (II) of a lettuce defoliation device according to an embodiment of the present utility model;

[0070] Figure 7 This is a schematic diagram (II) of the first support unit according to an embodiment of the present utility model;

[0071] Figure 8This is a schematic diagram of the length adjustment unit according to an embodiment of the present utility model;

[0072] Figure 9 This is a schematic diagram of the fixing unit according to an embodiment of the present utility model;

[0073] Figure 10 This is a schematic diagram (III) of a lettuce defoliation device according to an embodiment of the present utility model;

[0074] Figure 11 This is a schematic diagram of the active unit according to an embodiment of the present utility model.

[0075] The reference numerals in the attached figures are:

[0076] 100. Grip unit; 101. Grip element; 102. Anti-slip element;

[0077] 300. First support unit; 201. First lateral support element; 202. First rotating element; 203. First locking element; 204. Third rotating element;

[0078] 300. Second support unit; 301. Support plate element; 302. Diagonal support element; 303. Second rotating element; 304. Second locking element; 305. Third locking element;

[0079] 400. Height adjustment unit; 401. First longitudinal support element; 402. Second longitudinal support element; 403. Drive element;

[0080] 500, Defoliation Unit;

[0081] 600. Length adjustment unit; 601. Second lateral support element; 602. Fourth rotating element; 603. First sliding element; 604. Third lateral support element; 605. Second sliding element; 606. First connecting element; 607. First pressing block element; 608. Second pressing block element; 609. First base element; 610. Second connecting element;

[0082] 700, Fixing unit; 701, Strap element; 702, Second base element; 703, Third connecting element; 704, Fourth connecting element; 705, Fifth connecting element;

[0083] 800. Movable unit; 801. Third longitudinal support element; 802. First limiting element; 803. Fourth longitudinal support element; 804. Second limiting element. Detailed Implementation

[0084] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0085] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0086] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0087] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units (elements) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or apparatus. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0088] Example 1

[0089] An illustrative embodiment of this utility model, such as Figure 1 As shown, a lettuce defoliation device includes a gripping unit 100, a first support unit 300, a second support unit 300, a height adjustment unit 400, and a defoliation unit 500. The gripping unit 100 is used for gripping; the first end of the first support unit 300 is connected to the end of the gripping unit 100; the second support unit 300 is rotatably disposed at the second end of the first support unit 300; the height adjustment unit 400 is disposed on the second support unit 300; and the defoliation unit 500 is movably disposed at the bottom end of the second support unit 300 and connected to the height adjustment unit 400, for reciprocating vertically under the action of the height adjustment unit 400 to defoliate the lettuce.

[0090] In some embodiments, the leaf-removing unit 500 is made of metal, including but not limited to stainless steel.

[0091] In some of these embodiments, the leaf-removing unit 500 has a circular cross-sectional shape.

[0092] In some of these embodiments, the leaf-removing unit 500 is a leaf-removing ring.

[0093] like Figure 2As shown, the gripping unit 100 includes a gripping element 101 and an anti-slip element 102. The end of the gripping element 101 is connected to the first end of the first support unit 300 for gripping; the anti-slip element 102 is disposed on the outer edge surface of the gripping element 101 for anti-slip.

[0094] In some embodiments, the material of the gripping element 101 includes, but is not limited to, metal, such as stainless steel.

[0095] In some of these embodiments, the gripping element 101 is a handle.

[0096] The anti-slip element 102 and the gripping element 101 are connected by a fixed connection. The fixed connection method includes, but is not limited to, pasting (such as by adhesive).

[0097] The dimensions of the anti-slip element 102 are matched with the dimensions of the grip element 101. Generally, the radial dimension (e.g., inner diameter) of the anti-slip element 102 is equal to the radial dimension (e.g., outer diameter) of the grip element 101, and the length of the anti-slip element 102 is not greater than the length of the grip element 101.

[0098] In some of these embodiments, the anti-slip element 102 is an anti-slip sleeve.

[0099] like Figure 3 As shown, the first support unit 300 includes a first lateral support element 201, a first rotating element 202, and a first locking element 203. The first end of the first lateral support element 201 is connected to the end of the gripping unit 100; the first rotating element 202 is disposed at the second end of the first lateral support element 201 and is rotatably connected to the second support unit 300; the first locking element 203 is disposed at the end of the first rotating element 202 and is removably locked to the second support unit 300, used to cooperate with the second support unit 300 to lock the relative position of the second support unit 300 and the first support unit 300.

[0100] Specifically, the first end of the first lateral support element 201 is connected to the end of the gripping element 101.

[0101] The first lateral support element 201 and the gripping element 101 are connected by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0102] The dimensions of the first lateral support element 201 are matched with the dimensions of the gripping element 101. Generally, the radial dimension (e.g., outer diameter) of the first lateral support element 201 is not greater than the radial dimension (e.g., outer diameter) of the gripping element 101.

[0103] In some of these embodiments, the first lateral support element 201 includes, but is not limited to, a first lateral support rod.

[0104] The first rotating element 202 and the first transverse support element 201 are connected by a fixed connection. The fixed connection method includes, but is not limited to, integral molding and welding.

[0105] The first rotating element 202 is disposed perpendicular to the first transverse support element 201. Specifically, the axial direction of the first rotating element 202 is perpendicular to the axial direction of the first transverse support element 201.

[0106] The dimensions of the first rotating element 202 are matched with the dimensions of the first transverse support element 201. Generally, the radial dimension (e.g., outer diameter) of the first rotating element 202 is not less than the radial dimension (e.g., outer diameter) of the first transverse support element 201.

[0107] In some of these embodiments, the first rotating element 202 is a first rotating groove.

[0108] The first locking element 203 and the first rotating element 202 are connected in a fixed manner. The fixed connection method includes, but is not limited to, integral molding.

[0109] The dimensions of the first locking element 203 are matched with the dimensions of the first rotating element 202. Generally, the radial dimension (e.g., inner diameter) of the first locking element 203 is equal to the radial dimension (e.g., outer diameter) of the first rotating element 202, and the height of the first locking element 203 is less than the height of the first rotating element 202.

[0110] In some of these embodiments, the first locking element 203 is a first external thread.

[0111] like Figure 4 As shown, the second support unit 300 includes a support plate element 301, an inclined support element 302, a second rotating element 303, a second locking element 304, and a third locking element 305. The support plate element 301 is rotatably disposed at the second end of the first support unit 300, and is equipped with a height adjustment unit 400. A leaf-removing unit 500 is movably disposed at the bottom end of the support plate element 301. The bottom end of the inclined support element 302 is connected to the support plate element 301. The second rotating element 303 is disposed at the top end of the inclined support element 302 and rotatably connected to the first support unit 300, used to adjust the relative position of the support plate element 301 and the first support unit 300. The second locking element 304 is disposed on the outer edge surface of the second rotating element 303. The third locking element 305 can be removably locked to both the second locking element 304 and the first support unit 300, used to limit the relative position of the support plate element 301 and the first support unit 300.

[0112] Specifically, the support plate element 301 is rotatably disposed at the second end of the first transverse support element 201; the second rotating element 303 is rotatably connected to the first rotating element 202; and the third locking element 305 is removably locked to the first locking element 203.

[0113] The dimensions of the support element 301 are matched with the dimensions of the defoliation unit 500. Generally, the radial dimension (e.g., inner diameter) of the support element 301 is not smaller than the radial dimension (e.g., inner diameter) of the defoliation unit 500.

[0114] In some of these embodiments, the cross-sectional shape of the support element 301 is annular.

[0115] In some of these embodiments, the support element 301 is a support ring.

[0116] The inclined support element 302 and the support plate element 301 are connected by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0117] The dimensions of the inclined support element 302 are matched with the dimensions of the support plate element 301. Generally, the radial dimension (such as length and width) of the inclined support element 302 is smaller than the radial dimension (such as radius) of the cross section of the support plate element 301 in which it is located.

[0118] In some of these embodiments, the cross-sectional shape of the inclined support element 302 includes, but is not limited to, a circle, a rectangle, or a triangle.

[0119] In some of these embodiments, the angle between the inclined support element 302 and the support plate element 301 ranges from 30° to 60°.

[0120] In some of these embodiments, the inclined support element 302 is an inclined support plate or an inclined support rod.

[0121] The second rotating element 303 and the inclined support element 302 are connected by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0122] The dimensions of the second rotating element 303 are matched with the dimensions of the inclined support element 302. Generally, the radial dimension (e.g., outer diameter) of the second rotating element 303 is not greater than the radial dimension (e.g., length, width) of the cross section of the inclined support element 302 in which it is located.

[0123] The dimensions of the second rotating element 303 are matched with the dimensions of the first rotating element 202. Generally, the radial dimension (e.g., outer diameter) of the second rotating element 303 is not greater than the radial dimension (e.g., inner diameter) of the first rotating element 202, and the height of the second rotating element 303 is greater than the height of the first rotating element 202.

[0124] In some of these embodiments, the second rotating element 303 is the first rotating shaft.

[0125] The second locking element 304 and the second rotating element 303 are connected in a fixed manner. The fixed connection method includes, but is not limited to, integral molding.

[0126] The dimensions of the second locking element 304 are matched with the dimensions of the second rotating element 303. Generally, the radial dimension (e.g., inner diameter) of the second locking element 304 is equal to the radial dimension (e.g., outer diameter) of the second rotating element 303, and the height of the second locking element 304 is less than the height of the second rotating element 303.

[0127] In some of these embodiments, the second locking element 304 is a second external thread.

[0128] The third locking element 305 is connected to the first locking element 203 and the second locking element 304 by a threaded connection.

[0129] In some embodiments, the third locking element 305 includes a nut, a first internal thread, and a second internal thread. The nut is removably fitted onto the first rotating element 202 and the second rotating element 303. The first internal thread is located at the first end of the first nut and is locked to the first locking element 203. The second internal thread is located at the second end of the nut and is locked to the second locking element 304.

[0130] The dimensions of the first internal thread are matched with the dimensions of the first locking element 203. Generally, the radial dimension (e.g., outer diameter) of the first internal thread is equal to the radial dimension (e.g., outer diameter) of the first locking element 203.

[0131] The dimensions of the second internal thread are matched with the dimensions of the second locking element 304. Generally, the radial dimension (e.g., outer diameter) of the second internal thread is equal to the radial dimension (e.g., outer diameter) of the second locking element 304.

[0132] like Figure 5 As shown, the height adjustment unit 400 includes a first longitudinal support element 401, a second longitudinal support element 402, and a driving element 403. The top end of the first longitudinal support element 401 is connected to the bottom end of the second support unit 300; the second longitudinal support element 402 is slidably connected to the first longitudinal support element 401, and its bottom end is connected to the leaf removal unit 500; the driving element 403 is disposed at the top end of the second support unit 300 and connected to the second longitudinal support element 402, and is used to drive the second longitudinal support element 402 to reciprocate along the axial direction of the first longitudinal support element 401 to adjust the distance between the leaf removal unit 500 and the second support unit 300.

[0133] Specifically, the top end of the first longitudinal support element 401 is connected to the bottom end of the support plate element 301.

[0134] The connection between the first longitudinal support element 401 and the support plate element 301 is a detachable connection. The detachable connection method includes, but is not limited to, bolt connection.

[0135] The dimensions of the first longitudinal support element 401 are matched with the dimensions of the support plate element 301. Generally, the radial dimension (e.g., outer diameter) of the first longitudinal support element 401 is smaller than the radial dimension (e.g., width) of the cross section of the support plate element 301 in which it is located.

[0136] In some of these embodiments, the first longitudinal support element 401 is a first longitudinal support rod.

[0137] The dimensions of the second longitudinal support element 402 are matched with the dimensions of the first longitudinal support element 401. Generally, the radial dimension (e.g., outer diameter) of the second longitudinal support element 402 is not greater than the radial dimension (e.g., inner diameter) of the first longitudinal support element 401, and the height of the second longitudinal support element 402 is not less than the height of the first longitudinal support element 401.

[0138] In some of these embodiments, the second longitudinal support element 402 is a second longitudinal support rod.

[0139] In some of these embodiments, the drive element 403 includes, but is not limited to, a motor.

[0140] In some embodiments, the height adjustment unit 400 further includes a control element. This control element is disposed in the grip unit 100 or the first support unit 200 and connected to the drive element 403 for controlling the drive element 403.

[0141] Specifically, the control element is located at the first end of the gripping element 101 or the first lateral support element 201.

[0142] The control element and the drive element 403 are connected wirelessly, including but not limited to Bluetooth connection, infrared connection, etc.

[0143] In some embodiments, the control elements include, but are not limited to, control buttons, remote controls, etc.

[0144] Generally, the control element includes at least four control functions: start, forward rotation, reverse rotation, and stop.

[0145] In this invention, the drive element 403 may have a built-in control program, such as controlling the forward and reverse rotation of the drive element 403 by a preset time; or controlling the drive element 403 to perform forward and reverse rotation by a control element.

[0146] How to use this utility model:

[0147] Before removing the leaves from the lettuce, workers can rotate the first rotating element 202 and the second rotating element 303 according to their own height to adjust the angle between the support element 301 and the first horizontal support element 201. After meeting the requirements, the third locking element 305 is connected to the first locking element 203 and the second locking element 304 respectively, thereby locking the angle between the first horizontal support element 201 and the oblique support element 302. This ensures that the support element 301 is set horizontally in a comfortable state (such as without bending over) (i.e., regardless of whether the first horizontal support element 201 is tilted (such as tilted downwards or upwards), the support element 301 is always set horizontally).

[0148] When removing leaves from lettuce, the worker holds the holding element 101, aligns the defoliation unit 500 with the top of the corresponding lettuce, and activates the drive element 403 to drive the second longitudinal support element 402 to slide relative to the first longitudinal support element 401, pushing the defoliation unit 500 downward to remove leaves from the lettuce. After defoliation is completed, the worker operates the control element to reverse the drive element 403, thereby driving the second longitudinal support element 402 to retract into the first longitudinal support element 401. If the height of the lettuce is higher than the maximum height of the second longitudinal support element 402 and the first longitudinal support element 401, the worker can move the support plate element 301 downward as needed to reduce the height of the support plate element 301 from the ground.

[0149] Repeat the above steps to remove the leaves from different types of lettuce.

[0150] The technical effects of this utility model are as follows:

[0151] The first and second support units are rotatably connected, allowing for angle adjustments to suit different users and improve worker comfort. A height adjustment unit connects to both the second support unit and the leaf-removing unit, allowing the leaf-removing unit to be pushed forward to remove leaves from the lettuce by adjusting its height. During leaf removal, workers only need to align the leaf-removing unit with the lettuce; no force is required, saving labor, increasing efficiency, and preventing slippage between the hand and the grip unit, thus reducing the risk of injury. This solves the problems of high labor intensity, safety hazards, and low efficiency in leaf removal.

[0152] Example 2

[0153] This embodiment is a modified embodiment of embodiment 1.

[0154] like Figure 6As shown, the lettuce defoliation device also includes a length adjustment unit 600 and a fixing unit 700. The second end of the length adjustment unit 600 is rotatably connected to the first support unit 300 for adjusting the position of the first support unit 300; the side of the fixing unit 700 is connected to the first end of the length adjustment unit 600 for removably wearing around the worker's waist to fix the length adjustment unit 600 to the worker's waist.

[0155] like Figure 7 As shown, the first support unit 300 also includes a third rotating element 204. The third rotating element 204 is disposed on the side of the first support unit 300 and is rotatably connected to the second end of the length adjustment unit 600.

[0156] Specifically, the third rotating element 204 is disposed on the side of the first transverse support element 201.

[0157] The third rotating element 204 is connected to the first transverse support element 201 by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0158] In some embodiments, the third rotating element 204 includes a second rotating shaft and a first limiting block. The second rotating shaft is disposed on the first transverse support element 201 and is rotatably connected to the second end of the length adjusting unit 600; the first limiting block is disposed at the end of the second rotating shaft to prevent the second rotating shaft from separating from the length adjusting unit 600.

[0159] The dimensions of the first limiting block are matched with the dimensions of the second rotating shaft. Generally, the radial dimension (e.g., outer diameter) of the first limiting block is larger than the radial dimension (e.g., outer diameter) of the second rotating shaft.

[0160] like Figure 8As shown, the length adjustment unit 600 includes a second lateral support element 601, a fourth rotating element 602, a first sliding element 603, a third lateral support element 604, a second sliding element 605, a first connecting element 606, a first pressing element 607, a second pressing element 608, a first base element 609, and several second connecting elements 610. The second lateral support element 601 is rotatably disposed on the side of the first support unit 300; the fourth rotating element 602 is disposed at the second end of the second lateral support element 601 and rotatably connected to the first support unit 300; the first sliding element 603 is disposed on the second lateral support element 601; the third lateral support element 604 is disposed between the first support unit 300 and the fixed unit 700 and slidably connected to the second lateral support element 601; the second sliding element 605 is disposed on the third lateral support element 604 and slidably connected to the first sliding element 603; the first connecting element 606 is sleeved on the second end of the third lateral support element 604 and also sleeved on the second lateral support element 601. 1; A first pressing element 607 is rotatably disposed on the side of the first connecting element 606; a second pressing element 608 is movably disposed at the bottom end of the first pressing element 607 and located on the first sliding element 603, and is movably connected to the first connecting element 606, for pressing the second pressing element 608 by rotating the first pressing element 607 to press the second pressing element 608 to press the third transverse support element 604 to prevent the second transverse support element 601 and the third transverse support element 604 from moving relative to each other; a first base element 609 is disposed on the side of the third transverse support element 604; a plurality of second connecting elements 610 are distributed on the first base element 609 and are respectively connected to the fixing unit 700.

[0161] Specifically, the second lateral support element 601 is disposed on the side of the first lateral support element 301; the fourth rotating element 602 is rotatably connected to the third rotating element 204.

[0162] The dimensions of the second lateral support element 601 match those of the first lateral support element 301. Generally, the length of the second lateral support element 601 is not greater than the length of the first lateral support element 301.

[0163] In some of these embodiments, the second lateral support element 601 is a second lateral support rod.

[0164] The dimensions of the fourth rotating element 602 are matched with those of the third rotating element 204. Generally, the radial dimension (e.g., inner diameter) of the fourth rotating element 602 is not less than the radial dimension (e.g., outer diameter) of the second rotating shaft and not greater than the radial dimension (e.g., outer diameter) of the first limiting block.

[0165] In some of these embodiments, the fourth rotating element 602 is the second rotating groove.

[0166] The dimensions of the first sliding element 603 are matched with the dimensions of the second transverse support element 601. Generally, the radial dimension (e.g., outer diameter) of the first sliding element 603 is smaller than the radial dimension (e.g., inner diameter) of the second transverse support element 601, and the length of the first sliding element 603 is not greater than the length of the second transverse support element 601.

[0167] In some embodiments, there are multiple first sliding elements 603. Multiple first sliding elements 603 are arranged around a second lateral support element 601.

[0168] In some of these embodiments, the cross-section of the first sliding element 603 is arc-shaped, such as a semi-circle.

[0169] In some of these embodiments, the first sliding element 603 is a sliding groove.

[0170] The dimensions of the third lateral support element 604 are matched with those of the second lateral support element 601. Generally, the radial dimension (e.g., inner diameter) of the third lateral support element 604 is greater than the radial dimension (e.g., outer diameter) of the second lateral support element 601, and the length of the third lateral support element 604 is not greater than the length of the second lateral support element 601.

[0171] The maximum value of the sum of the length of the third lateral support element 604 and the length of the second lateral support element 601 is not less than the length of the first lateral support element 601.

[0172] In some of these embodiments, the third lateral support element 604 is a third lateral support rod.

[0173] The dimensions of the second sliding element 605 are matched with those of the first sliding element 603. Generally, the radial dimension (e.g., outer diameter) of the second sliding element 605 is equal to the radial dimension (e.g., inner diameter) of the first sliding element 603.

[0174] The dimensions of the second sliding element 605 are matched with the dimensions of the third lateral support element 604. Generally, the radial dimension (e.g., outer diameter) of the second sliding element 605 is smaller than the radial dimension (e.g., inner diameter) of the third lateral support element, and the length of the second sliding element 605 is not greater than the length of the third lateral support element 604.

[0175] The number of second sliding elements 605 matches the number of first sliding elements 603. Generally, the number of second sliding elements 605 is equal to the number of first sliding elements 603. That is, each second sliding element 605 corresponds to one first sliding element 603.

[0176] In some embodiments, there are multiple second sliding elements 605.

[0177] In some of these embodiments, the cross-sectional shape of the second sliding element 605 is arc-shaped, such as semi-circular.

[0178] In some of these embodiments, the second sliding element 605 is a sliding bump.

[0179] The first connecting element 606 and the second transverse support element 601 are connected by a sliding connection.

[0180] The first connecting element 606 and the third transverse support element 604 are connected by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0181] The dimensions of the first connecting element 606 are matched with the dimensions of the third lateral support element 604. Generally, the radial dimension (e.g., inner diameter) of the first connecting element 606 is equal to the radial dimension (e.g., outer diameter) of the third lateral support element 604.

[0182] In some embodiments, the first connecting element 606 includes a connecting joint, a movable groove, a third rotating groove, two fourth rotating grooves, and two sliding grooves. The connecting joint is sleeved on the second end of the third transverse support element 604 and also sleeves the second transverse support element 601. The movable groove extends axially through the connecting joint and is used to sleeve the second end of the third transverse support element 604 and the second transverse support element 601. The third rotating groove extends through one side of the connecting joint, is located at the top of the movable groove, and communicates with the movable groove, and is used to accommodate the first pressing block element 607 and the second pressing block element 608. The two fourth rotating grooves are symmetrically arranged at both ends of the connecting joint and at both ends of the third rotating groove, and are rotatably connected to the first pressing block element 607 respectively. The two sliding groove elements are symmetrically arranged at the top of the connecting joint and at the top of the movable groove, and are slidably connected to the second pressing block element 608 respectively.

[0183] In some embodiments, the first pressing element 607 includes a first pressing block, a third rotating shaft, and a rotating plate. The first pressing block is cylindrical and rotatably disposed in the third rotating groove; the third rotating shaft is disposed off-center in the first pressing block and rotatably connected to two third rotating grooves respectively; the rotating plate is disposed on the side of the first pressing block for gripping when rotating the first pressing block.

[0184] The dimensions of the first pressure block are matched with the dimensions of the first connecting element 606. Generally, the radial dimension (e.g., outer diameter) of the first pressure block is smaller than the radial dimension (e.g., inner diameter) of the third rotating groove, and the axial dimension (e.g., length) of the first pressure block is not greater than the axial dimension (e.g., length) of the third rotating groove.

[0185] The dimensions of the third rotating shaft are matched with the dimensions of the first pressing block. Generally, the radial dimension (e.g., outer diameter) of the third rotating shaft is smaller than the radial dimension (e.g., outer diameter) of the first pressing block.

[0186] In some embodiments, the sum of the lengths of the two third rotating shafts and the length of the first pressure block is not greater than the length of the first connecting element 606.

[0187] The dimensions of the rotating plate are matched with the dimensions of the first pressing block. Generally, the height of the rotating plate is no greater than the diameter of the first pressing block, and the width of the rotating plate is no greater than the length of the first pressing block.

[0188] The second pressing element 608 is connected to the first connecting element 606 by a sliding connection.

[0189] In some embodiments, the second pressing element 608 includes a second pressing block and two movable shafts. The second pressing block is disposed on the first connecting element 606 (third rotating groove) and located on the first sliding element 603. The side of the second pressing block that contacts the first sliding element 603 is arc-shaped, used to press the first sliding element 603 under the action of the first pressing element 607 (first pressing block) to prevent the first sliding element 603 from sliding. The two movable shafts are symmetrically disposed at both ends of the second pressing block and are slidably connected to the first connecting element 606 (two sliding grooves), used to reciprocate along the axial direction of the movable shafts under the action of the first pressing element 607 (first pressing block).

[0190] The dimensions of the second pressure block are matched with the dimensions of the first sliding element 603. Generally, the radial dimension (e.g., outer diameter) of the second pressure block is not greater than the radial dimension (e.g., inner diameter) of the first sliding element 603.

[0191] The dimensions of the movable shaft match the dimensions of the first connecting element 606. Generally, the radial dimension (e.g., outer diameter) of the movable shaft is not greater than the radial dimension (e.g., inner diameter) of the sliding groove, and the axial dimension (e.g., height) of the movable shaft is less than the axial dimension (e.g., height) of the sliding groove.

[0192] Understandably, the sliding groove of the first connecting element 606 is also limited to the movable shaft to prevent the movable shaft from separating from the sliding groove.

[0193] The first base element 609 and the third transverse support element 604 are connected by a fixed connection. The fixed connection method includes, but is not limited to, welding.

[0194] The dimensions of the first base element 609 are matched with the dimensions of the third lateral support element 604. Generally, the length of the first base element 609 is less than the length of the third lateral support element 604.

[0195] In some of these embodiments, the first base element 609 is a first base.

[0196] A plurality of second connecting elements 610 are spaced apart along the length and / or width direction of the first base element 609.

[0197] The dimensions of the second connecting element 610 are matched with the dimensions of the first base element 609. Generally, the radial dimension (e.g., outer diameter) of the second connecting element 610 is smaller than the radial dimension (e.g., length, width) of the first base element 609.

[0198] In some of these embodiments, the second connecting element 610 is the first connecting hole.

[0199] like Figure 9 As shown, the fixing unit 700 includes a strap element 701, a second base element 702, several third connecting elements 703, a fourth connecting element 704, and a fifth connecting element 705. The strap element 701 is disposed on the side of the length adjustment unit 600 and is used to removably bind to the worker's waist. The second base element 702 is disposed on the side of the strap element 701. Several third connecting elements 703 are distributed on the second base element 702 and are respectively connected to the length adjustment unit 600 for fixing the length adjustment unit 600. The fourth connecting element 704 is disposed on the side of the first end of the strap element 701. The fifth connecting element 704 is disposed on the side of the second end of the strap element 701 and is detachably connected to the fourth connecting element 704 for fixing the strap element 701 to the worker's waist.

[0200] Specifically, the second base element 702 is disposed on the side of the first base element 609; a plurality of third connecting elements 703 are detachably connected to the corresponding second connecting elements 610.

[0201] In some embodiments, the material of the strap element 701 includes, but is not limited to, leather (such as PU) and textiles (such as canvas).

[0202] In some of these embodiments, the strap element 701 is a strap.

[0203] The second base element 702 and the strap element 701 are connected by a fixed connection. The fixed connection method includes, but is not limited to, sewing.

[0204] The dimensions of the second base element 702 are matched with the dimensions of the strap element 701. Generally, the height of the second base element 702 is less than the height of the strap element 701, and the length of the second base element 702 is less than the length of the strap element 701.

[0205] The dimensions of the second base element 702 are matched with the dimensions of the first base element 609. Generally, the radial dimension (e.g., length, width) of the second base element 702 is not less than the radial dimension (e.g., length, width) of the cross section of the first base element 609 in which it is located.

[0206] In some embodiments, the material of the second base element 702 includes, but is not limited to, plastic.

[0207] In some of these embodiments, the second base element 702 is a second base.

[0208] A plurality of third connecting elements 703 are spaced apart along the length and / or width of the second base element 702 and correspond to the position of the second connecting element 610.

[0209] The dimensions of the third connecting element 703 are matched with the dimensions of the second base element 702. Generally, the radial dimension (e.g., outer diameter) of the third connecting element 703 is smaller than the radial dimension (e.g., length, width) of the second base element 702.

[0210] The number of third connecting elements 703 matches the number of second connecting elements 610. Generally, the number of third connecting elements 703 is not less than the number of second connecting elements 610.

[0211] In some embodiments, the third connecting element 703 is the second connecting hole. The third connecting element 703 and the second connecting element 610 are fixed together by bolts.

[0212] The fourth connecting element 704 is connected to the binding element 701 by a fixed connection. The fixed connection method includes, but is not limited to, sewing.

[0213] The dimensions of the fourth connecting element 704 match the dimensions of the strap element 701. Generally, the length of the fourth connecting element 704 is less than the length of the strap element 701, and the width of the fourth connecting element 704 is not greater than the width of the strap element 701.

[0214] In some embodiments, the fourth connecting element 704 is the first hook and loop side or the first hook and loop side.

[0215] The fifth connecting element 705 is connected to the binding element 701 by a fixed connection. The fixed connection method includes, but is not limited to, sewing.

[0216] The dimensions of the fifth connecting element 705 match those of the strap element 701. Generally, the length of the fifth connecting element 705 is less than the length of the strap element 701, and the width of the fifth connecting element 705 is not greater than the width of the strap element 701.

[0217] In some embodiments, the fifth connecting element 705 is a second hook-and-loop fastener surface or a second hook-and-loop fastener hook surface. Specifically, of the fifth connecting element 705 and the fourth connecting element 704, one is a hook-and-loop fastener surface and the other is a hook-and-loop fastener hook surface.

[0218] The usage method of this embodiment is as follows:

[0219] In use, the operator can adjust the total length of the third horizontal support element 604 and the second horizontal support element 601 according to the needs of use. The specific operation is as follows: pull the third horizontal support element 604 and the second horizontal support element 601, and slide the first sliding element 603 and the second sliding element 605 relative to each other until the total length meets the requirements. Then, rotate the first pressing element 607 to squeeze the second pressing element 608, thereby locking the relative position of the second horizontal support element 601 and the third horizontal support element 604. Then, use the fourth connecting element 704 and the fifth connecting element 705 to connect and bind the strap element 701 to the waist. Then, hold the holding element 101 to make the first horizontal support element 201 and the second horizontal support element 601 rotate relative to each other. According to the leaf removal method of embodiment 1, by rotating the first horizontal support element 201, the leaf removal unit 500 is lowered and aligned with the top of the lettuce. After the leaf removal is completed, lift the leaf removal unit 500 and the second support unit 300 to remove the leaves from the next lettuce.

[0220] The technical effects of this embodiment are as follows:

[0221] The lettuce defoliation device is secured to the worker's waist using a strap unit, allowing the worker to share the weight of the device with their body, freeing up their hands and improving comfort. The length adjustment unit, rotatably connected to the first support unit, not only allows for adjusting the distance between the defoliation unit and the body as needed, expanding the defoliation range and improving efficiency, but also provides flexibility and convenience. Furthermore, by placing the rotation point at the top of the length adjustment unit, the worker can easily defoliate the lettuce simply by rotating the grip unit, saving effort and further solving the problem of low defoliation efficiency.

[0222] Example 3

[0223] This embodiment is a modified embodiment of Embodiments 1 and 2.

[0224] like Figure 10 As shown, the lettuce defoliation device also includes at least one movable unit 800. The movable unit 800 is disposed between the second support unit 300 and the defoliation unit 500, and is used to reciprocate along the axial direction of the height adjustment unit 400 under the action of the defoliation unit 500 to stabilize the defoliation unit 500.

[0225] When there are several active units 800, the several active units 800 are distributed at intervals along the circumference of the support plate element 301.

[0226] like Figure 11 As shown, the active unit 800 includes a third longitudinal support element 801, a first limiting element 802, a fourth longitudinal support element 803, and a second limiting element 804. The top end of the third longitudinal support element 801 is connected to the bottom end of the second support unit 300; the first limiting element 802 is disposed at the bottom end of the third longitudinal support element 801; the fourth longitudinal support element 803 is slidably connected to the third longitudinal support element 801, and its bottom end is connected to the leaf-removing unit 500, used to reciprocate under the action of the leaf-removing unit 500 to stabilize the leaf-removing unit 500; the second limiting element 804 is disposed at the top end of the fourth longitudinal support element 803 and is limitedly connected to the first limiting element 802, used to prevent the fourth longitudinal support element 803 from separating from the third longitudinal support element 801.

[0227] Specifically, the top end of the third longitudinal support element 801 is connected to the bottom end of the support plate element 301.

[0228] The third longitudinal support element 801 is connected to the support plate element 301 in a detachable manner. The detachable connection method includes, but is not limited to, bolt connection.

[0229] The dimensions of the third longitudinal support element 801 are matched with the dimensions of the support plate element 301. Generally, the radial dimension (e.g., outer diameter) of the third longitudinal support element 801 is smaller than the radial dimension (e.g., width) of the cross section of the support plate element 301 in which it is located.

[0230] In some of these embodiments, the third longitudinal support element 801 is a third longitudinal support rod.

[0231] The dimensions of the first limiting element 802 are matched with the dimensions of the third longitudinal support element 801. Generally, the radial dimension (e.g., outer diameter) of the first limiting element 802 is smaller than the radial dimension (e.g., inner diameter) of the third longitudinal support element.

[0232] In some of these embodiments, the first limiting element 802 is a limiting ring.

[0233] The dimensions of the fourth longitudinal support element 803 are matched with those of the third longitudinal support element 801. Generally, the radial dimension (e.g., outer diameter) of the fourth longitudinal support element 803 is smaller than the radial dimension (e.g., inner diameter) of the third longitudinal support element 801, and the height of the fourth longitudinal support element 803 is not less than the height of the third longitudinal support element 801.

[0234] The dimensions of the fourth longitudinal support element 803 are matched with the dimensions of the first limiting element 802. Generally, the radial dimension (e.g., outer diameter) of the fourth longitudinal support element 803 is not greater than the radial dimension (e.g., inner diameter) of the first limiting element 802.

[0235] In some of these embodiments, the fourth longitudinal support element 803 is a fourth longitudinal support rod.

[0236] The second limiting element 804 and the fourth longitudinal support element 803 are connected by a fixed connection. The fixed connection method includes, but is not limited to, integral molding and welding.

[0237] The dimensions of the second limiting element 804 are matched with the radial dimensions of the third longitudinal support element 801. Generally, the radial dimension (e.g., outer diameter) of the second limiting element 804 is smaller than the radial dimension (e.g., inner diameter) of the third longitudinal support element 801.

[0238] The dimensions of the second limiting element 804 are matched with the dimensions of the first limiting element 802. Generally, the radial dimension (e.g., outer diameter) of the second limiting element 804 is larger than the radial dimension (e.g., inner diameter) of the first limiting element 802.

[0239] In some of these embodiments, the second limiting element 804 is a second limiting block.

[0240] The usage method of this embodiment is as follows:

[0241] When defoliating lettuce using the method of Example 1 or Example 2, the driving element 403 drives the second longitudinal support element 402 to push the defoliating unit 500 downward, while simultaneously causing the fourth longitudinal support element 803 and the third longitudinal support element 801 to slide relative to each other, and the first limiting element 802 and the second limiting element 804 are connected in a limiting manner.

[0242] The technical effects of this embodiment are as follows:

[0243] By utilizing the reciprocating motion of the moving unit and the defoliating unit together under the action of the height adjustment unit, not only can the defoliating unit be stabilized, the defoliating quality improved, and the service life of the defoliating unit extended, but it can also assist in the defoliation of lettuce, thereby improving the defoliation efficiency.

[0244] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lettuce defoliation device, characterized in that, include: Grip unit for gripping; A first support unit, wherein a first end of the first support unit is connected to an end of the gripping unit; A second support unit is rotatably disposed at the second end of the first support unit; A height adjustment unit is disposed on the second support unit; A defoliation unit is movably disposed at the bottom end of the second support unit and connected to the height adjustment unit. It is used to reciprocate vertically under the action of the height adjustment unit to defoliate the lettuce.

2. The lettuce defoliation device according to claim 1, characterized in that, The gripping unit includes: A gripping element, the end of which is connected to the first end of the first support unit for gripping; An anti-slip element is disposed on the outer edge surface of the gripping element for preventing slippage.

3. The lettuce defoliation device according to claim 1, characterized in that, The first support unit includes: A first lateral support element, the first end of which is connected to the end of the gripping unit; A first rotating element is disposed at the second end of the first transverse support element and is rotatably connected to the second support unit; A first locking element is disposed at the end of the first rotating element and is removably locked to the second support unit, for cooperating with the second support unit to lock the relative position of the second support unit and the first support unit.

4. The lettuce defoliation device according to claim 1, characterized in that, The second support unit includes: A support plate element is rotatably disposed at the second end of the first support unit. The support plate element is provided with the height adjustment unit, and the leaf removal unit is movably disposed at the bottom end of the support plate element. An inclined support element, the bottom end of which is connected to the support plate element; The second rotating element is disposed at the top of the inclined support element and is rotatably connected to the first support unit, and is used to adjust the relative position of the support plate element and the first support unit. A second locking element is disposed on the outer edge surface of the second rotating element; A third locking element is removably locked to the second locking element and the first support unit, respectively, for defining the relative position of the support plate element and the first support unit.

5. The lettuce defoliation device according to claim 1, characterized in that, The height adjustment unit includes: A first longitudinal support element, the top end of which is connected to the bottom end of the second support unit; The second longitudinal support element is slidably connected to the first longitudinal support element, and the bottom end of the second longitudinal support element is connected to the leaf removal unit. A driving element is disposed at the top of the second support unit and connected to the second longitudinal support element, for driving the second longitudinal support element to reciprocate along the axial direction of the first longitudinal support element to adjust the distance between the leaf removal unit and the second support unit.

6. The lettuce defoliation device according to any one of claims 1 to 5, characterized in that, Also includes: A length adjustment unit, the second end of which is rotatably connected to the first support unit, is used to adjust the position of the first support unit; A fixing unit, the side of which is connected to the first end of the length adjustment unit, is used to removably wear on the worker's waist to fix the length adjustment unit to the worker's waist; and / or At least one movable unit is disposed between the second support unit and the leaf removal unit, and is used to reciprocate along the axial direction of the height adjustment unit under the action of the leaf removal unit to stabilize the leaf removal unit.

7. The lettuce defoliation device according to claim 6, characterized in that, The first support unit further includes: The third rotating element is disposed on the side of the first support unit and is rotatably connected to the second end of the length adjustment unit.

8. The lettuce defoliation device according to claim 6, characterized in that, The length adjustment unit includes: A second lateral support element is rotatably disposed on the side of the first support unit; The fourth rotating element is disposed at the second end of the second transverse support element and is rotatably connected to the first support unit; A first sliding element is disposed on the second transverse support element; A third lateral support element is disposed between the first support unit and the fixed unit, and is slidably connected to the second lateral support element; A second sliding element is disposed on the third transverse support element and is slidably connected to the first sliding element; A first connecting element is sleeved on the second end of the third lateral support element, and the second lateral support element is also sleeved on it. A first pressing element is rotatably disposed on the side of the first connecting element; The second pressing element is movably disposed at the bottom end of the first pressing element and located at the first sliding element, and is movably connected to the first connecting element. It is used to press the second pressing element against the third transverse support element by rotating the first pressing element to prevent the second transverse support element from moving relative to the third transverse support element. A first base element is disposed on the side of the third transverse support element; A plurality of second connecting elements are distributed on the first base element and are respectively connected to the fixing unit.

9. The lettuce defoliation device according to claim 6, characterized in that, The fixing unit includes: A strap element, disposed on the side of the length adjustment unit, is used to removably secure to the worker's waist; A second base element is disposed on the side of the strap element; A plurality of third connecting elements are distributed on the second base element and are respectively connected to the length adjustment unit for fixing the length adjustment unit; A fourth connecting element is disposed on the side of the first end of the strap element; A fifth connecting element is disposed on the side of the second end of the strap element and is detachably connected to the fourth connecting element for fixing the strap element to the worker's waist.

10. The lettuce defoliation device according to claim 6, characterized in that, The activity unit includes: The third longitudinal support element, the top end of which is connected to the bottom end of the second support unit; A first limiting element is disposed at the bottom end of the third longitudinal support element; A fourth longitudinal support element is slidably connected to the third longitudinal support element, and the bottom end of the fourth longitudinal support element is connected to the leaf removal unit, which is used to reciprocate under the action of the leaf removal unit to stabilize the leaf removal unit. The second limiting element is disposed at the top of the fourth longitudinal support element and is limitedly connected to the first limiting element to prevent the fourth longitudinal support element from separating from the third longitudinal support element.

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