CN110915402B

CN110915402B - Ginseng is adopted fast and is dug device

Info

Publication number: CN110915402B
Application number: CN201911332972.XA
Authority: CN
Inventors: 刘金花; 徐卫宾; 刘桂银; 徐魁
Original assignee: Jining Center For Food And Drug Control (jining Medicine Adverse Reaction And Medicament Abuse Monitoring Center)
Current assignee: Jining Center For Food And Drug Control (jining Medicine Adverse Reaction And Medicament Abuse Monitoring Center)
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-02-09
Anticipated expiration: 2039-12-20
Also published as: AU2020100621A4; CN110915402A

Abstract

The invention belongs to the technical field of ginseng digging, and particularly relates to a ginseng quick digging device which comprises a connecting module and a digging cutter; the connecting module comprises a connecting pipe, a connecting shaft and an adjusting arm; a connecting shaft is arranged inside the connecting pipe; according to the invention, the two digging knives are arranged on the inner side of the support frame, the tops of the two digging knives are connected with the sliding plate through the V-shaped hinge frame and the hinge rod II, and the first hinge rod is connected with the connecting lug, so that the two digging knives can clamp soil blocks where the young ginseng is located when the young ginseng is mined and dug, the young ginseng and the surrounding soil can be conveniently removed by workers, the young ginseng is separated from the soil, the integrity of the root system of the young ginseng can be ensured, the young ginseng is conveniently mined and dug, the gear is connected with the thread on the connecting shaft through the two adjusting arms, the positions of the digging knives are conveniently adjusted, the young ginseng is conveniently mined and dug, the workload of the workers is reduced, and the mining efficiency is improved.

Description

Ginseng is adopted fast and is dug device

Technical Field

The invention relates to the technical field of ginseng digging, in particular to a ginseng rapid digging device.

Background

The seed sowing is a main method adopted in production, and can be used for seedling raising and transplanting or direct seeding. The seeds can be sowed all the year round when the seeds are cultivated in a protected area. By utilizing sunlight greenhouse cultivation, the seeds can be sown immediately after being harvested in early autumn, and the seedlings emerge about 10 days after sowing. The open field cultivation is suitable for spring cultivation, seedling is cultivated in a greenhouse between 3 months and 4 months in early spring, the seedlings are transplanted to the open field after frost treatment, or the seedlings are directly sown in the open field from late 4 months to 5 months, the seeds of panicled fameflower root are small so that the seedling cultivation and transplantation are good, meanwhile, a sowing land bed needs to be finely ploughed and finely harrowed, the soil of the land bed needs to be finely crushed, and the land bed surface needs to be smooth.

However, in the existing process of transferring, digging and digging panicled fameflower root, young sea cucumbers in a soil pit need to be manually dug and dug, the difficulty is high in the process of digging and digging, and the roots of the young sea cucumbers need to be carefully distinguished, so that the root systems of the young sea cucumbers can be prevented from being broken, the workload of workers is increased, the roots of the young sea cucumbers are easy to break, the survival rate of transplanted young sea cucumbers is easy to reduce, and the digging efficiency is reduced.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a ginseng rapid digging device, two digging knives are arranged on the inner side of a support frame, the tops of the two digging knives are connected with a sliding plate through a V-shaped hinged frame and a hinged rod II, and the tops of the two digging knives are connected with a connecting lug through a hinged rod I, so that when young ginseng is dug, the two digging knives can clamp soil blocks where the young ginseng is located, workers can conveniently remove the young ginseng and peripheral soil simultaneously and then separate the young ginseng from the soil, the integrity of the root system of the young ginseng can be ensured, the young ginseng is dug conveniently, and a gear is connected with a thread on a connecting shaft through two adjusting arms, so that the positions of the digging knives are adjusted conveniently, the young ginseng is dug conveniently, the workload of the workers is reduced, and the digging efficiency is improved.

The purpose of the invention can be realized by the following technical scheme:

a Ginseng radix rapid digging device comprises a connecting module and a digging cutter; the connecting module comprises a connecting pipe, a connecting shaft and an adjusting arm; the connecting pipe is internally provided with a connecting shaft, the top of the connecting pipe is symmetrically and rotatably connected with two gears through a hinge seat, the bottom end of the connecting pipe is fixedly connected with a connecting frame, and the bottom of the connecting frame is fixedly connected with a protection module; the middle part of the connecting shaft is provided with threads which are meshed with the two gears, the bottom end of the connecting shaft is rotatably connected with an adjusting module, and the bottom end of the adjusting module is fixedly connected with two digging knives; the number of the adjusting arms is two, and one ends of the two adjusting arms are fixedly connected with rotating columns; one end of each of the two rotating columns is fixedly connected with the center position of one side of each of the two gears; wherein the content of the first and second substances,

the protection module comprises a support frame and a sliding plate; two round rods are symmetrically and fixedly connected to the inner side of the supporting frame; two ends of the sliding plate are respectively connected with the two round rods in a sliding manner, and a round through hole is formed in the center of the sliding plate;

the adjusting module comprises a V-shaped hinge frame, a first hinge rod, a connecting rod and a second hinge rod; the bottom end of the connecting shaft penetrates through the circular through hole and is fixedly connected with a connecting lug, and two ends of the connecting lug are respectively and rotatably connected with one end of the first hinge rod; the other ends of the first two hinge rods are respectively in rotating connection with the end parts of arms on one side of the two V-shaped hinge frames; the end parts of the other side arms of the two V-shaped hinged frames are fixedly connected with the tops of the two digging knives respectively, the tops of the two digging knives are fixedly connected with one side arm of the two V-shaped hinged frames respectively through connecting rods, and the end parts of the small ends of the two V-shaped hinged frames are rotatably connected with a second hinged rod; two ends of the bottom of the sliding plate are fixedly connected with the end parts of the two hinge rods II respectively; the outer sides of the two digging knives are fixedly connected with push handles; when the ginseng rapid excavating device is used, the ginseng rapid excavating device is moved to an excavating area, then a foot is used for treading downwards on the push handle, so that the two excavating knives are inserted into soil, at the moment, the V-shaped hinged frame at the top of the excavating knife pulls the connecting lug to move downwards along with the connecting lug, the threads on the connecting shaft enable the two gears to rotate, the two adjusting arms are enabled to rotate upwards when the gears rotate, then the two adjusting arms rotate downwards, the connecting shaft moves upwards through the engagement of the threads and the gears, when the connecting lug moves upwards along with the connecting lug, the two V-shaped hinged frames are pulled to rotate oppositely under the action of the first hinged rod and the second hinged rod, at the moment, the bottom ends of the first hinged rod and the two excavating knives are close to each other, so that the two excavating knives can clamp soil blocks, when the connecting shaft continues to move upwards, the connecting lug jointly lifts the two excavating knives through the first hinged rod and the V-shaped hinged frames, make the sliding plate slide on two round bars, guarantee that the route of two digging knives does not change, then the staff can take out the clod, then take out the young ginseng, take off the soil around the seedling root system, the staff of being convenient for like this gets rid of the back with the young ginseng and peripheral soil simultaneously, participate in the soil with the young and separate, thereby can guarantee the complete degree of young ginseng root system, be convenient for adopt the young ginseng and dig, and make two digging knives shift up through two regulating arms, the work load of staff has been reduced, the efficiency of adopting and digging has been improved.

Further, the method comprises the following steps: the protection module further comprises a supporting plate; the supporting plate and the supporting frame are both of arc structures with one sides open, and the inner side wall of the supporting plate is fixedly connected with the outer side of the bottom of the supporting frame; when digging the young ginseng, utilize the layer board to contact with ground to can carry out spacingly to the position of support frame, keep the support frame stable, thereby be convenient for dig the sword and insert and dig in earth.

Further, the method comprises the following steps: when the digging cutter is at an initial position, the bottom surface of the digging cutter and the bottom surface of the support frame are in the same horizontal plane, and when the digging cutter is in a working state, the push handle is in contact with the top surface of the bracket; the support frame can be used for carrying out safety protection on the digging cutter, the digging cutter is prevented from being exposed to scratch the skin of people, the digging cutter is prevented from being collided and deformed with foreign objects, and therefore the service life of digging is prolonged.

Further, the method comprises the following steps: an included angle between one side arm of the V-shaped hinged frame and the bottom surface of the sliding plate ranges from 30 degrees to 45 degrees; the included angle between the two digging knives ranges from 0 to 30 degrees; after the soil block where the young sea cucumber is located is integrally dug by the two digging cutters, the connecting shaft enables the two V-shaped hinged frames to drive the two digging cutters to be close to each other through the connecting convex block, so that the soil block where the young sea cucumber is located can be clamped tightly, the root system of the young sea cucumber is prevented from being pulled and broken due to loose soil when the soil block is taken out, and the survival rate of the young sea cucumber can be improved.

Further, the method comprises the following steps: the top of the connecting pipe is symmetrically and fixedly connected with two handles, and a horizontal center line between the two handles is vertical to a horizontal center line between the two push handles; after two digging knives inserted in soil, soil between two digging knives and peripheral soil are in the state of being connected, are not convenient for take out the clod, and at this moment, through rotating two handles to can make two digging knives can rotate in soil, thereby can separate the clod that the young ginseng belongs to and peripheral soil, improved this ginseng and adopted the efficiency and the quality of digging fast.

Further, the method comprises the following steps: the width of the large end of the connecting lug is smaller than the inner diameter of the circular through hole on the sliding plate, and the connecting lug is positioned at the bottom of the sliding plate when being positioned at the initial position; when two digging knives inserted into soil are reset, the connecting lug can drive the soil blocks between the two V-shaped hinged frames to be firstly clamped, and then when the connecting lug moves upwards continuously, the two digging knives can be integrally lifted to the ground, so that the young ginseng digging efficiency is improved.

The invention has the beneficial effects that:

1. through the inboard at the support frame be provided with two digging knives, and the top of two digging knives is connected with the sliding plate through V type articulated frame and hinge bar two, be connected with connecting the lug through hinge bar one, thereby can be when adopting to dig the young ginseng, make two digging knives carry out the centre gripping to the clod that the young ginseng belonged to, the staff of being convenient for gets rid of the back with young ginseng and peripheral soil simultaneously, participate in the soil with the young and separate, thereby can guarantee the complete degree of young ginseng root system, be convenient for adopt to dig the young ginseng, and make gear and the epaxial threaded connection of connecting through two regulating arms, thereby be convenient for adjust the position of digging knife, be convenient for adopt to dig the young ginseng, staff's work load has been reduced, the efficiency of adopting and digging has been improved.

2. Utilize the support frame can carry out safety protection to the digging cutter, avoid the digging cutter to expose fish tail people's skin, and avoid digging cutter and foreign object collision deformation, thereby the life who digs has been prolonged, and utilize the layer board to contact with ground, thereby can carry on spacingly to the position of support frame, it is stable to keep the support frame, thereby be convenient for digging cutter to insert and adopt in earth and dig, through rotating two handles, can make two digging cutters rotate in soil, thereby can be with the clod and the peripheral soil separation at young ginseng place, the efficiency of digging and the quality of digging of this ginseng is adopted fast has been improved.

Drawings

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

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the present invention in operation;

FIG. 3 is a schematic view of the connection protrusion and the V-shaped hinge bracket according to the present invention;

FIG. 4 is a schematic diagram of the construction of the conditioning module of the present invention;

FIG. 5 is a schematic view of the construction of the digging cutter and adjustment module of the present invention;

FIG. 6 is a schematic view showing the construction of the connecting shaft according to the present invention;

fig. 7 is a schematic structural view of the support frame of the present invention.

In the figure: 100. a connection module; 110. a connecting pipe; 111. a grip; 120. a connecting shaft; 121. a connection bump; 130. a gear; 140. an adjusting arm; 141. rotating the column; 200. a connecting frame; 300. digging a cutter; 310. a push handle; 400. an adjustment module; 410. a V-shaped hinge frame; 420. a first hinge rod; 430. a connecting rod; 440. a second hinge rod; 500. a protection module; 510. a support frame; 511. a round bar; 520. a support plate; 530. a sliding plate; 531. and a circular through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, a rapid ginseng harvesting device includes a connection module 100 and a cutter 300; the connection module 100 includes a connection pipe 110, a connection shaft 120, and an adjustment arm 140; a connecting shaft 120 is arranged inside the connecting pipe 110, the top of the connecting pipe 110 is symmetrically and rotatably connected with two gears 130 through a hinge seat, the bottom end of the connecting pipe 110 is fixedly connected with a connecting frame 200, and the bottom of the connecting frame 200 is fixedly connected with a protection module 500; the middle part of the connecting shaft 120 is provided with threads which are meshed with the two gears 130, the bottom end of the connecting shaft 120 is rotatably connected with an adjusting module 400, and the bottom end of the adjusting module 400 is fixedly connected with two digging knives 300; the number of the adjusting arms 140 is two, and one end of each of the two adjusting arms 140 is fixedly connected with a rotating column 141; one end of each of the two rotating columns 141 is fixedly connected to the center of one side of each of the two gears 130; wherein the content of the first and second substances,

the protection module 500 includes a support frame 510 and a sliding plate 530; two round rods 511 are symmetrically and fixedly connected to the inner side of the support frame 510; two ends of the sliding plate 530 are respectively connected with the two round rods 511 in a sliding manner, and a round through hole 531 is formed in the center of the sliding plate 530;

the adjusting module 400 comprises a V-shaped hinge frame 410, a first hinge rod 420, a connecting rod 430 and a second hinge rod 440; the bottom end of the connecting shaft 120 penetrates through the circular through hole 531 and is fixedly connected with a connecting lug 121, and two ends of the connecting lug 121 are respectively rotatably connected with one end of the two first hinge rods 420; the other ends of the first two hinge rods 420 are respectively and rotatably connected with the end parts of one side arms of the two V-shaped hinge frames 410; the end parts of the other side arms of the two V-shaped hinged frames 410 are fixedly connected with the tops of the two digging knives 300 respectively, the tops of the two digging knives 300 are fixedly connected with one side arm of the two V-shaped hinged frames 410 through connecting rods 430 respectively, and the end parts of the small ends of the two V-shaped hinged frames 410 are rotatably connected with a second hinged rod 440; two ends of the bottom of the sliding plate 530 are fixedly connected with the end parts of the two second hinge rods 440 respectively; the outer sides of the two digging knives 300 are fixedly connected with push handles 310; when the ginseng rapid excavating device is used, the ginseng rapid excavating device is moved to an excavating area, then the push handle 310 is stepped downwards by feet, so that the two excavating knives 300 are inserted into soil, at the moment, the V-shaped hinge frame 410 at the top of the excavating knife 300 pulls the connecting lug 121 to move downwards along with the connecting lug, the two gears 130 are rotated by the threads on the connecting shaft 120, the two adjusting arms 140 are rotated upwards when the gears 130 are rotated, then the two adjusting arms 140 are rotated downwards, the connecting shaft 120 moves upwards by meshing the threads with the gears 130, when the connecting lug 121 moves upwards along with the connecting lug, the two V-shaped hinge frames 410 are pulled by the first hinge rod 420 under the action of the second hinge rod 440 to rotate oppositely, at the moment, the bottom ends of the two first hinge rods 420 enable the bottom ends of the two excavating knives 300 to be close to each other, so that the two excavating knives 300 can clamp soil blocks, and when the connecting lug 121 continues to move upwards, the two excavating knives 300 are lifted by the first hinge rods 420 and the V-shaped hinge frames 410 together until the two The utility model discloses a soil separation device, make sliding plate 530 slide on two round bars 511, guarantee that two digging knives 300's route does not change, then the staff can take out the clod, then take out the young ginseng, take off the soil around the seedling root system, the staff of being convenient for like this gets rid of the back with the young ginseng simultaneously with peripheral soil, participate in the soil with the young and separate, thereby can guarantee the complete degree of young ginseng root system, be convenient for adopt the excavation to the young ginseng, and make two digging knives 300 move up through two regulating arms 140, the work load of staff has been reduced, the efficiency of adopting the excavation has been improved.

The shielding module 500 further includes a support plate 520; the supporting plate 520 and the supporting frame 510 are both arc structures with one sides open, and the inner side wall of the supporting plate 520 is fixedly connected with the outer side of the bottom of the supporting frame 510; when young sea cucumbers are mined, the supporting plate 520 is in contact with the ground, so that the position of the supporting frame 510 can be limited, the supporting frame 510 is kept stable, and the digging cutter 300 can be conveniently inserted into soil for mining; when the digging cutter 300 is at the initial position, the bottom surface of the digging cutter 300 and the bottom surface of the supporting frame 510 are in the same horizontal plane, and when the digging cutter 300 is in the working state, the push handle 310 is in contact with the top surface of the supporting plate 520; the supporting frame 510 can be used for carrying out safety protection on the digging cutter 300, so that the digging cutter 300 is prevented from being exposed out to scratch the skin of people, and the digging cutter 300 is prevented from being deformed by collision with foreign objects; the included angle between one side arm of the V-shaped hinge frame 410 and the bottom surface of the sliding plate 530 is 30-45 degrees; the included angle between the two digging knives 300 ranges from 0 to 30 degrees; after the soil block where the young sea cucumber is integrally dug by the two digging knives 300, the connecting shaft 120 enables the two V-shaped hinged frames 410 to drive the two digging knives 300 to be close to each other through the connecting convex block 121, so that the soil block where the young sea cucumber is located can be clamped tightly, the root system of the young sea cucumber is prevented from being pulled and broken due to loose soil when the soil block is taken out, and the survival rate of the young sea cucumber can be improved.

The top of the connecting pipe 110 is symmetrically and fixedly connected with two handles 111, and a horizontal central line between the two handles 111 is perpendicular to a horizontal central line between the two push handles 310; after the two digging knives 300 are inserted into soil, the soil between the two digging knives 300 is in a connected state with the surrounding soil, so that soil blocks are not convenient to take out, at the moment, the two digging knives 300 can rotate in the soil by rotating the two handles 111, and the soil blocks where young ginseng is located can be separated from the surrounding soil; the width of the large end of the connecting protrusion 121 is smaller than the inner diameter of the circular through hole 531 on the sliding plate 530, and the connecting protrusion 121 is located at the bottom of the sliding plate 530 when in the initial position; when two digging knives 300 inserted into soil are reset, the connecting lug 121 can drive the soil blocks between the two V-shaped hinged frames 410 to be clamped firstly, and then when the connecting lug 121 moves upwards continuously, the two digging knives 300 can be integrally lifted to the ground, so that the young ginseng digging efficiency is improved.

The working principle is as follows: when the ginseng rapid excavating device is used, the ginseng rapid excavating device is moved to an excavating area, then the push handle 310 is stepped downwards by feet, so that the two excavating knives 300 are inserted into soil, at the moment, the V-shaped hinge frame 410 at the top of the excavating knife 300 pulls the connecting lug 121 to move downwards along with the connecting lug, the two gears 130 are rotated by the threads on the connecting shaft 120, the two adjusting arms 140 are rotated upwards when the gears 130 are rotated, then the two adjusting arms 140 are rotated downwards, the connecting shaft 120 moves upwards by meshing the threads with the gears 130, when the connecting lug 121 moves upwards along with the connecting lug, the two V-shaped hinge frames 410 are pulled by the first hinge rod 420 under the action of the second hinge rod 440 to rotate oppositely, at the moment, the bottom ends of the two first hinge rods 420 enable the bottom ends of the two excavating knives 300 to be close to each other, so that the two excavating knives 300 can clamp soil blocks, and when the connecting lug 121 continues to move upwards, the two excavating knives 300 are lifted by the first hinge rods 420 and the V-shaped hinge frames 410 together until the two The utility model discloses a soil separation device, make sliding plate 530 slide on two round bars 511, guarantee that two diggers 300's route does not change, then the staff can take out the clod, then take out the young ginseng, take off the soil around the seedling root system, the staff of being convenient for like this gets rid of the back with the young ginseng simultaneously with peripheral soil, participates in the soil with the young and separates, thereby can guarantee the complete degree of young ginseng root system, be convenient for adopt the digger to the young ginseng, and make two diggers 300 move up through two regulating arms 140.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims

1. A ginseng rapid digging device is characterized by comprising a connecting module (100) and a digging cutter (300); the connecting module (100) comprises a connecting pipe (110), a connecting shaft (120) and an adjusting arm (140); a connecting shaft (120) is arranged inside the connecting pipe (110), the top of the connecting pipe (110) is symmetrically and rotatably connected with two gears (130) through a hinged seat, the bottom end of the connecting pipe (110) is fixedly connected with a connecting frame (200), and the bottom of the connecting frame (200) is fixedly connected with a protection module (500); the middle of the connecting shaft (120) is provided with threads, the threads are meshed with the two gears (130), the bottom end of the connecting shaft (120) is rotatably connected with an adjusting module (400), and the bottom end of the adjusting module (400) is fixedly connected with two digging knives (300); the number of the adjusting arms (140) is two, and one end of each of the two adjusting arms (140) is fixedly connected with a rotating column (141); one end of each of the two rotating columns (141) is fixedly connected with the center position of one side of each of the two gears (130); wherein the content of the first and second substances,

the protection module (500) comprises a support frame (510) and a sliding plate (530); the inner side of the support frame (510) is symmetrically and fixedly connected with two round rods (511); two ends of the sliding plate (530) are respectively connected with the two round rods (511) in a sliding manner, and a round through hole (531) is formed in the center of the sliding plate (530);

the adjusting module (400) comprises a V-shaped hinge frame (410), a first hinge rod (420), a connecting rod (430) and a second hinge rod (440); the bottom end of the connecting shaft (120) penetrates through the circular through hole (531) and is fixedly connected with a connecting lug (121), and two ends of the connecting lug (121) are respectively and rotatably connected with one end of each of the two first hinge rods (420); the other ends of the first hinge rods (420) are respectively and rotatably connected with the end parts of one side arms of the two V-shaped hinge frames (410); the end parts of the other side arms of the two V-shaped hinged frames (410) are fixedly connected with the tops of the two digging knives (300) respectively, the tops of the two digging knives (300) are fixedly connected with one side arm of the two V-shaped hinged frames (410) respectively through connecting rods (430), and the end parts of the small ends of the two V-shaped hinged frames (410) are rotatably connected with a second hinged rod (440); two ends of the bottom of the sliding plate (530) are fixedly connected with the end parts of the two second hinge rods (440) respectively; the outer sides of the two digging knives (300) are fixedly connected with pushing handles (310).

2. The ginseng rapid cutting device according to claim 1, wherein the protection module (500) further comprises a support plate (520); the supporting plate (520) and the supporting frame (510) are both of arc structures with one sides open, and the inner side wall of the supporting plate (520) is fixedly connected with the outer side of the bottom of the supporting frame (510).

3. The ginseng rapid digging device according to claim 2, wherein when the digging cutter (300) is in the initial position, the bottom surface of the digging cutter (300) and the bottom surface of the supporting frame (510) are in the same horizontal plane, and when the digging cutter (300) is in the working state, the push handle (310) is in contact with the top surface of the supporting plate (520).

4. The ginseng rapid cutting device according to claim 3, wherein an angle between one side arm of the V-shaped hinge frame (410) and the bottom surface of the sliding plate (530) is in a range of 30-45 degrees; the included angle between the two digging knives (300) ranges from 0 degree to 30 degrees.

5. The ginseng rapid digging device according to claim 1, wherein the top of the connecting pipe (110) is symmetrically connected with two handles (111), and a horizontal center line between the two handles (111) is perpendicular to a horizontal center line between the two push handles (310).

6. The ginseng rapid digging device according to claim 1, wherein the width of the large end of the connecting projection (121) is smaller than the inner diameter of the circular through hole (531) of the sliding plate (530), and the connecting projection (121) is located at the bottom of the sliding plate (530) when in the initial position.