Area metering device convenient to carry

Abstract

The invention provides a portable area metering device which comprises a storage box, a first rotating shaft rotatably mounted on the storage box, a pull rope arranged on a wire spool on the first rotating shaft, insertion rods arranged in a placement groove, a fixing block mounted on the side surface of each insertion rod, a laser positioning module mounted on the insertion rods, and a horizontal conveying mechanism arranged in the storage box and in transmission connection with the first rotating shaft. The longitudinal pop-up mechanism is rotationally installed in the storage box and is in transmission connection with the first rotating shaft, the elastic adjusting mechanism is connected with the pull rope and is used for accurately placing the pull rope on the fixing block, and the position of the pull rope on the fixing block is adjusted when the wire shifting mechanism works; the device not only has the characteristics of being convenient to carry and simple to operate, but also can ensure the positioning precision and reduce errors when an area to be measured is metered, and meanwhile, can prevent the pull rope from warping due to gravity, so that the purpose of improving the metering precision is achieved, in addition, a plurality of insertion rods can be sequentially pulled out in the take-up process, and the metering accuracy is improved. And subsequent arrangement and storage in a storage box are facilitated.

Description

Technical Field

[0001] The invention belongs to the field of area measurement, and in particular relates to a portable area measuring device. Background Art

[0002] Nowadays, the measurement of land area has a wide range of uses, especially farmland area. Farmland area is one of the most basic data in agricultural production management. The size of farmland area directly determines the input of production materials such as seeds, fertilizers, and pesticides. It is also the main basis for calculating working hours and charges for field operations of agricultural machinery. As a result, different types of land area measurement devices have appeared on the market.

[0003] The area measuring devices currently used use rope-type devices for measuring complex landforms. The ropes are prone to slight bending under the action of gravity, and the positioning reference cannot be determined. This causes a large deviation between the final measured result and the actual area, affecting the measurement accuracy. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a portable area measuring device, aiming to solve the problems existing in the above-mentioned background technology.

[0005] The embodiment of the present invention is implemented as follows: a portable area measuring device includes a storage box and a handle installed on the storage box, and further includes: A rotating shaft 1, wherein the rotating shaft 1 is rotatably mounted on the storage box, a winding drum is fixedly connected to the rotating shaft 1, and a pull rope is arranged on the winding drum; A plurality of insertion rods are provided and arranged in sequence in the placement slots provided in the storage box, and a fixing block is installed on the side of each insertion rod; A laser positioning module, which is installed on the insertion rod to improve the positioning accuracy; A horizontal feeding mechanism, wherein the horizontal feeding mechanism is arranged in the storage box, and the second rotating shaft in the horizontal feeding mechanism is transmission-connected with the first rotating shaft to push the insertion rod to move in the placement slot; A longitudinal ejection mechanism, the longitudinal ejection mechanism is rotatably mounted in the storage box, the rotating shaft 3 in the longitudinal ejection mechanism is transmission-connected with the rotating shaft 1, and the insertion rod pushed by the horizontal feeding mechanism is pushed outward; An elastic adjustment mechanism, which is installed on the storage box and connected to the drawstring, and is used to accurately place the drawstring on the fixed block; The wire pulling mechanism is hinged at the bottom of the storage box and adjusts the position of the pull rope on the fixed block when working, so as to pull the insertion rod out of the soil during the reverse movement of the device.

[0006] Preferably, the laser positioning module comprises a laser emitter, a through hole and a ruled lens; Wherein, the laser transmitter is fixedly mounted on the side of the insertion rod; The laser emitter is provided with a through hole, in which a line-engraved lens is installed, and the line-engraved lens cooperates with the laser emitter to improve the measurement accuracy.

[0007] Preferably, the horizontal feeding mechanism comprises a second rotating shaft, a first driving gear, a horizontal toothed plate, a limit block, a first groove and a second elastic support member; The rotating shaft 2 is rotatably installed in the storage box, and a driving gear 1 is installed at the end of the rotating shaft 2, and the driving gear 1 is meshed with a horizontal gear plate, and a limit block abutting against the insertion rod is fixedly installed on the horizontal gear plate; The grooves 1 are arranged in pairs in the storage box, and elastic supporting members 2 abutting against the insertion rods are installed in the grooves 1.

[0008] Preferably, the longitudinal ejection mechanism comprises a third rotating shaft, a second driving gear, a gear shaft, a striking rod and a second groove; The rotating shaft 3 is rotatably mounted on the storage box, and a driving gear 2 is mounted on the end of the rotating shaft 3, and the driving gear 2 is in meshing state with the gear shaft installed in the storage box; A striking rod is also arranged on the gear shaft, and when the striking rod moves in the second groove provided in the storage box along with the gear shaft, the inserting rod is pushed to move outward.

[0009] Preferably, the elastic adjustment mechanism comprises a telescopic member 1, a roller 1, a guide rod, an elastic support member 1 and a roller 2; The telescopic member 1 is fixedly installed at the bottom of the storage box, two rollers 1 are installed on the telescopic member 1, and the pull rope is arranged between the rollers 1; The guide rod is slidably installed in the storage box, an elastic support member 1 is sleeved on the guide rod, and a roller 2 which abuts against the pull rope is rotatably installed at the end of the guide rod.

[0010] Preferably, the wire shifting mechanism comprises a shifting rod and a telescopic member 2; The lever is hinged to a support installed at the bottom of the storage box, and a transition arc 1 is provided at the bottom end of the lever; The outer side of the fixing block is provided with a second transition arc, and the inner top and bottom of the fixing block are provided with arc grooves; The second telescopic member is fixedly installed at the bottom of the storage box, and the free end of the second telescopic member is connected to the lever to facilitate pushing the lever to swing and adjust the position of the pull rope on the fixed block.

[0011] Preferably, the first rotating shaft is provided with a first pulley, and the second rotating shaft and the third rotating shaft are provided with a second pulley; The pulley 1 is connected to the pulley 2 on the rotating shaft 2 through a synchronous belt 1, and the pulley 1 is also connected to the pulley 2 on the rotating shaft 3 through a synchronous belt 2; The storage box is also provided with a vertical slot which is connected to the placement slot and is used for re-placing the insertion rod in the placement slot after metering.

[0012] The embodiment of the present invention provides a portable area measuring device, which is not only easy to carry and simple to operate, but also can ensure the positioning accuracy and reduce errors when measuring the area to be measured. At the same time, it can also prevent the pull rope from warping due to gravity, thereby achieving the purpose of improving the measurement accuracy; in addition, multiple rods can be pulled out in turn during the winding process, which is convenient for subsequent sorting and placing in a storage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a portable area measuring device provided by an embodiment of the present invention; Figure 2 A schematic diagram of a partial structure of a horizontal feeding mechanism 100 in a portable area measuring device provided by an embodiment of the present invention; Figure 3 for Figure 1 A partial enlarged view of the middle part; Figure 4 for Figure 1 A partial enlarged view of point B in the middle; Figure 5 A transmission diagram of a first rotating shaft, a second rotating shaft and a third rotating shaft in a portable area measuring device provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a wire-dial mechanism 400 in a portable area measuring device provided by an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged view of point C in the middle; In the attached drawings: 1-storage box; 2-handle; 3-rotating shaft 1; 4-winding drum; 5-pull rope; 6-placing slot; 7-insertion rod; 8-fixing block; 9-laser emitter; 10-through hole; 11-line lens; 12-telescopic member 1; 13-roller 1; 14-guide rod; 15-elastic support member 1; 16-roller 2; 17-rotating shaft 2; 18-driving gear 1; 19-horizontal tooth plate; 20-limiting block; 21 -Groove 1; 22-Elastic support member 2; 23-Rotating shaft 3; 24-Driving gear 2; 25-Gear shaft; 26-Strike rod; 27-Groove 2; 28-Pulley 1; 29-Pulley 2; 30-Synchronous belt 1; 31-Synchronous belt 2; 32-Push rod; 33-Telescopic member 2; 34-Vertical groove; 100-Horizontal feeding mechanism; 200-Longitudinal ejection mechanism; 300-Elastic adjustment mechanism; 400-Wire-pushing mechanism. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0016] like Figures 1 to 7 As shown, it is a structural diagram of a portable area measuring device provided by an embodiment of the present invention, comprising a storage box 1, a rotating shaft 3, an insertion rod 7, a laser positioning module, a horizontal feeding mechanism 100, a longitudinal ejection mechanism 200, an elastic adjustment mechanism 300 and a wire dialing mechanism 400, wherein a handle 2 is installed on the upper surface of the storage box 1, the rotating shaft 3 is rotatably installed on the storage box 1, a winding drum 4 is fixedly connected to the rotating shaft 3, and a pull rope 5 is arranged on the winding drum 4; a plurality of the insertion rods 7 are provided, and are arranged in sequence in the placement slots 6 opened in the storage box 1, and a fixing block 8 is installed on the side of each insertion rod 7; the laser positioning module is installed on the insertion rod 7 to improve the positioning accuracy; the horizontal feeding mechanism 1 00 is arranged in the storage box 1, and the rotating shaft 2 17 in the horizontal feeding mechanism 100 is connected with the rotating shaft 1 3 to push the insertion rod 7 to move in the placement groove 6; the longitudinal pop-up mechanism 200 is rotatably installed in the storage box 1, and the rotating shaft 3 23 in the longitudinal pop-up mechanism 200 is connected with the rotating shaft 1 3 to push the insertion rod 7 pushed by the horizontal feeding mechanism 100 outward; the elastic adjustment mechanism 300 is installed on the storage box 1, and the elastic adjustment mechanism 300 is connected with the pull rope 5 to accurately place the pull rope 5 on the fixed block 8; the wire dialing mechanism 400 is hinged at the bottom of the storage box 1, and adjusts the position of the pull rope 5 on the fixed block 8 when working, so as to pull the insertion rod 7 out of the soil during the reverse movement of the device.

[0017] In one embodiment of the present invention, the storage box 1 is further provided with a vertical slot 34, which is connected to the placement slot 6, and is used to re-place the insertion rod 7 in the placement slot 6 after metering. Casters can also be arranged at the bottom of the storage box 1 as needed to facilitate the storage box 1 to rotate along the ground. A pulley 28 is installed on the rotating shaft 13, and a pulley 29 is installed on the rotating shaft 2 17 and the rotating shaft 3 23; the pulley 28 is connected to the pulley 29 on the rotating shaft 2 17 through a synchronous belt 1 30, and the pulley 28 is also connected to the pulley 29 on the rotating shaft 3 23 through a synchronous belt 2 31. The rotating shaft 13 is connected to the external motor shaft end through a coupling, and the external motor is electrically connected to an independently arranged controller. At the same time, the controller is also connected to the telescopic member 12 and the lever 32, which controls the rotation of the rotating shaft 1 3, the rotating shaft 2 17 and the rotating shaft 3 23 on the one hand, and controls the extension of the telescopic member 12 and the lever 32 on the other hand.

[0018] like Figure 1 As shown, as a preferred embodiment of the present invention, the laser positioning module includes a laser emitter 9, a through hole 10 and a ruled lens 11; Wherein, the laser transmitter 9 is fixedly mounted on the side of the insertion rod 7; The laser emitter 9 is provided with a through hole 10, in which a line-engraved lens 11 is installed. The line-engraved lens 11 cooperates with the laser emitter 9 to improve the measurement accuracy.

[0019] In one embodiment of the present invention, after the first rod 7 is inserted into the ground, the laser emitter 9 starts to emit rays, and multiple rods 7 are inserted into the ground in sequence. The rays pass through the engraved lens 11 in sequence and pass through its center, which can ensure the accuracy of measurement in the subsequent measurement process.

[0020] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, as another preferred embodiment of the present invention, the horizontal feeding mechanism 100 includes a second rotating shaft 17, a driving gear 18, a horizontal toothed plate 19, a stop block 20, a groove 1 21 and a second elastic support member 22; The second rotating shaft 17 is rotatably mounted in the storage box 1, and a driving gear 18 is mounted on the end of the second rotating shaft 17. The driving gear 18 is meshed with a horizontal toothed plate 19, and a limit block 20 abutting against the insertion rod 7 is fixedly mounted on the horizontal toothed plate 19; The grooves 1 21 are arranged in pairs in the storage box 1 , and elastic support members 2 2 abutting against the insertion rod 7 are installed in the grooves 1 21 .

[0021] In one example of the present invention, the rotating shaft 13 drives the pulley 128 at the corresponding position to rotate when rotating, and drives the pulley 29 and the rotating shaft 17 to rotate along the storage box 1 through the arranged synchronous belt 130, and the rotating shaft 17 drives the driving gear 18 to rotate. Since the driving gear 18 is engaged with the horizontal tooth plate 19, the horizontal tooth plate 19 and the limit block 20 can be pushed to slide along the storage box 1, and the limit block 20 pushes the insertion rod 7 to move horizontally along the placement groove 6, and the elastic support member 22 is elastically deformed under the force.

[0022] like Figure 1 , Figure 4 and Figure 5 As shown, as another preferred embodiment of the present invention, the longitudinal ejection mechanism 200 includes a third rotating shaft 23, a second driving gear 24, a gear shaft 25, a striking rod 26 and a second groove 27; The rotating shaft 3 23 is rotatably mounted on the storage box 1 , and a driving gear 24 is mounted on the end of the rotating shaft 3 23 , and the driving gear 24 is in meshing state with a gear shaft 25 installed in the storage box 1 ; The gear shaft 25 is also provided with a striking rod 26 , and the striking rod 26 pushes the insertion rod 7 to move outwards when the gear shaft 25 moves in the groove 27 provided in the storage box 1 .

[0023] In one example of the present invention, the rotating shaft 1 3 drives the pulley 1 28 at the corresponding position to rotate, and drives the pulley 2 29 and the rotating shaft 3 23 to rotate synchronously through the arranged synchronous belt 2 31. The rotating shaft 3 23 also drives the driving gear 2 24 to rotate, and then drives the gear shaft 25 to rotate along the storage box 1. The striking rod 26 rotates in the groove 2 27 with the gear shaft 25, and pushes out the insertion rod 7 in turn in the rotating state, so that the insertion rod 7 is inserted into the ground after being accelerated to disengage from the elastic support member 2 22.

[0024] like Figure 1 and Figure 3 As shown, as another preferred embodiment of the present invention, the elastic adjustment mechanism 300 includes a telescopic member 12, a roller 13, a guide rod 14, an elastic support member 15 and a roller 2 16; The telescopic member 12 is fixedly installed at the bottom of the storage box 1, and two rollers 13 are installed on the telescopic member 12, and the pull rope 5 is arranged between the rollers 13; The guide rod 14 is slidably installed in the storage box 1 , and an elastic support member 15 is sleeved on the guide rod 14 . A roller 2 16 that abuts against the pull rope 5 is rotatably installed at the end of the guide rod 14 .

[0025] In one example of the present invention, after multiple insertion rods 7 are inserted into the ground in sequence, the end of the pull rope 5 is connected to the fixed block 8 installed on the first insertion rod 7, and during the movement of the device, the pull rope 5 is laid on the fixed block 8 in sequence by controlling the roller 13 through the arranged telescopic member 12, so that the pull rope 5 is in a taut state, avoiding the pull rope 5 from slightly bending due to gravity during the measurement process, thereby improving the measurement accuracy.

[0026] like Figure 1 , Figure 6 and Figure 7 As shown in FIG. 1 , as another preferred embodiment of the present invention, the wire-shifting mechanism 400 includes a lever 32 and a telescopic member 33; The lever 32 is hinged to a support installed at the bottom of the storage box 1, and a transition arc 1 is provided at the bottom end of the lever 32; The outer side of the fixing block 8 is provided with a transition arc 2, and the inner top and bottom of the fixing block 8 are provided with arc grooves; The second telescopic member 33 is fixedly installed at the bottom of the storage box 1 , and the free end of the second telescopic member 33 is connected to the lever 32 , so as to push the lever 32 to swing and adjust the position of the pull rope 5 on the fixed block 8 .

[0027] In one embodiment of the present invention, after a single metering is completed, the extension amount of the telescopic member 2 33 is adjusted by an independently arranged controller. When the telescopic member 2 33 moves back with the storage box 1, it intermittently pushes the lever 32 to swing along the bottom end of the storage box 1. When the lever 32 swings, the pull rope 5 is pulled out of the arc groove at the top of the fixed block 8. The pull rope 5 moves along the transition arc 1 and the transition arc 2, and finally stays in the arc groove at the bottom of the fixed block 8, so that when the pull rope 5 is retracted, the pulling force can be used to pull out multiple insertion rods 7 from the soil in turn, and it is convenient for subsequent recovery.

[0028] In summary, in actual use, measurement is performed from the corner of the area to be measured. When the rotating shaft 13 rotates, it drives the pulley 128 at the corresponding position to rotate, and drives the pulley 29 and the rotating shaft 17 to rotate along the storage box 1 through the arranged synchronous belt 130. The rotating shaft 17 drives the driving gear 18 to rotate. Since the driving gear 18 is engaged with the horizontal toothed plate 19, the horizontal toothed plate 19 and the limit block 20 can be pushed to slide along the storage box 1. The limit block 20 pushes the insertion rod 7 to move horizontally along the placement groove 6. The rotating shaft 13 also drives the pulley 29 and the rotating shaft 23 through the arranged synchronous belt 231. 3 rotates synchronously, the rotating shaft 3 23 also drives the driving gear 24 to rotate, and then drives the gear shaft 25 to rotate along the storage box 1, the striking rod 26 rotates with the gear shaft 25 in the groove 27, and pushes out the insertion rod 7 in turn in the rotating state, so that the insertion rod 7 is accelerated to break away from the elastic support member 22 and then inserted into the ground. In this process, the laser transmitter 9 emits rays that pass through multiple line lenses 11 in turn. After ensuring the accuracy, the end of the pull rope 5 is connected to the fixed block 8, and the roller 13 is controlled by the arranged telescopic member 12 so that the pull rope 5 is laid on the fixed block 8 in turn, so that the pull rope 5 is in The storage box 1 is in a taut state, thereby measuring the length of the section, and after adjusting the steering, measuring work is carried out in the other direction. After the measurement result is input into the external controller, the controller can calculate the area of ​​the measuring area to accurately obtain the size of the area to be measured. After the measurement is completed, the storage box 1 moves in the opposite direction, and the elongation of the telescopic member 2 33 is adjusted by an independently arranged controller. When the telescopic member 2 33 moves back with the storage box 1, it intermittently pushes the lever 32 to swing along the bottom end of the storage box 1. When the lever 32 swings, the pull rope 5 is pulled out of the arc groove on the top of the fixed block 8, and the pull rope 5 moves along the transition arc 1. The second movement of the transition arc finally stops in the arc groove at the bottom of the fixed block 8, so that when the pull rope 5 is retracted, the multiple insertion rods 7 can be pulled out from the soil in turn by using the pulling force. After the insertion rods 7 are pulled out, they are placed in the placement grooves 6 in sequence, thereby completing the single area measurement work; the device is not only easy to carry and easy to operate, but also can ensure the positioning accuracy and reduce the error when measuring the area to be measured. At the same time, it can also avoid the warping of the pull rope 5 due to gravity, so as to achieve the purpose of improving the measurement accuracy; in addition, multiple insertion rods 7 can be pulled out in turn during the line winding process, which is convenient for subsequent sorting and placement in the storage box 1.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable area measuring device, comprising a storage box and a handle mounted on the storage box, characterized in that: Also includes: A rotating shaft 1, wherein the rotating shaft 1 is rotatably mounted on the storage box, a winding drum is fixedly connected to the rotating shaft 1, and a pull rope is arranged on the winding drum; A plurality of insertion rods are provided and arranged in sequence in the placement slots provided in the storage box, and a fixing block is installed on the side of each insertion rod; A laser positioning module, which is installed on the insertion rod to improve the positioning accuracy; A horizontal feeding mechanism, wherein the horizontal feeding mechanism is arranged in the storage box, and the second rotating shaft in the horizontal feeding mechanism is transmission-connected with the first rotating shaft to push the insertion rod to move in the placement slot; A longitudinal ejection mechanism, the longitudinal ejection mechanism is rotatably mounted in the storage box, the rotating shaft 3 in the longitudinal ejection mechanism is transmission-connected with the rotating shaft 1, and the insertion rod pushed by the horizontal feeding mechanism is pushed outward; An elastic adjustment mechanism, which is installed on the storage box and connected to the drawstring, and is used to accurately place the drawstring on the fixed block; The wire pulling mechanism is hinged at the bottom of the storage box and adjusts the position of the pull rope on the fixed block when working, so as to pull the insertion rod out of the soil during the reverse movement of the device.

2. A portable area measuring device according to claim 1, characterized in that: The laser positioning module includes a laser emitter, a through hole and a line lens; Wherein, the laser transmitter is fixedly mounted on the side of the insertion rod; The laser emitter is provided with a through hole, in which a line-engraved lens is installed, and the line-engraved lens cooperates with the laser emitter to improve the measurement accuracy.

3. A portable area measuring device according to claim 1, characterized in that: The horizontal feeding mechanism comprises a second rotating shaft, a first driving gear, a horizontal toothed plate, a limit block, a first groove and a second elastic support member; The rotating shaft 2 is rotatably installed in the storage box, and a driving gear 1 is installed at the end of the rotating shaft 2, and the driving gear 1 is meshed with a horizontal gear plate, and a limit block abutting against the insertion rod is fixedly installed on the horizontal gear plate; The grooves 1 are arranged in pairs in the storage box, and elastic supporting members 2 abutting against the insertion rods are installed in the grooves 1.

4. A portable area measuring device according to claim 1, characterized in that: The longitudinal ejection mechanism comprises a third rotating shaft, a second driving gear, a gear shaft, a striking rod and a second groove; The rotating shaft 3 is rotatably mounted on the storage box, and a driving gear 2 is mounted on the end of the rotating shaft 3, and the driving gear 2 is in meshing state with the gear shaft installed in the storage box; A striking rod is also arranged on the gear shaft, and when the striking rod moves in the second groove provided in the storage box along with the gear shaft, the inserting rod is pushed to move outward.

5. A portable area measuring device according to claim 1, characterized in that: The elastic adjustment mechanism comprises a telescopic member 1, a roller 1, a guide rod, an elastic support member 1 and a roller 2; The telescopic member 1 is fixedly installed at the bottom of the storage box, two rollers 1 are installed on the telescopic member 1, and the pull rope is arranged between the rollers 1; The guide rod is slidably installed in the storage box, an elastic support member 1 is sleeved on the guide rod, and a roller 2 which abuts against the pull rope is rotatably installed at the end of the guide rod.

6. A portable area measuring device according to claim 1, characterized in that: The wire-shifting mechanism comprises a shifting rod and a telescopic member 2; The lever is hinged to a support installed at the bottom of the storage box, and a transition arc 1 is provided at the bottom end of the lever; The outer side of the fixing block is provided with a second transition arc, and the inner top and bottom of the fixing block are provided with arc grooves; The second telescopic member is fixedly installed at the bottom of the storage box, and the free end of the second telescopic member is connected to the lever to facilitate pushing the lever to swing and adjust the position of the pull rope on the fixed block.

7. A portable area measuring device according to claim 1, characterized in that: The first rotating shaft is provided with a first pulley, and the second rotating shaft and the third rotating shaft are provided with a second pulley; The pulley 1 is connected to the pulley 2 on the rotating shaft 2 through a synchronous belt 1, and the pulley 1 is also connected to the pulley 2 on the rotating shaft 3 through a synchronous belt 2; The storage box is also provided with a vertical slot which is connected to the placement slot and is used for re-placing the insertion rod in the placement slot after metering.

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