Corn planting device capable of conveniently controlling planting depth

Abstract

The utility model discloses a corn planting device convenient to control planting depth, which relates to the technical field of corn planting equipment, and comprises an outer cylinder body, a movable cylinder, a threaded cylinder, a blocking disc, a placing plate, a vertical mounting plate, a seed storage box, a shifting mechanism and an operating mechanism, the seed storage box is arranged in the outer barrel, a stirring mechanism used for stirring corn seeds is arranged in the seed storage box, the blocking disc is rotationally arranged on the outer side of the outer barrel in a sleeving mode, and the movable barrel is communicated with the seed storage box through sliding. According to the automatic seeding machine disclosed by the utility model, the seeds can be automatically fed through the operating mechanism during seeding, so that the problem that time and labor are wasted due to frequent manual seed feeding is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to corn planting equipment technical field, concretely relates to a corn planting device convenient to control planting depth. BACKGROUND

[0002] The corn has two forms of ditching and hole planting, wherein the ditching is suitable for larger planting area, and the hole planting is suitable for smaller planting area, and the latter mostly adopts artificial dibbling to carry out sowing.

[0003] In the process of artificial dibbling, a hole planting machine is mostly used, the main body structure is a hollow column barrel, the upper end of the barrel body is provided with an opening and closing assembly for controlling the opening and closing of the lower end, after the corn seeds are put into the barrel from the upper end of the barrel body, the column barrel is inserted into the ground, and then the opening and closing assembly is controlled to open the lower end of the barrel body, the seeds enter the soil from the lower end of the barrel body, since the soil has different characteristics under different temperature and humidity, the staff needs to adjust the sowing depth according to the soil condition before sowing, however, the above structure can only rely on the experience of the sowing personnel to insert the barrel into the soil at the appropriate position during sowing, and does not have precision, and the process of manually putting seeds after each sowing is relatively cumbersome, and the working strength is increased.

[0004] In order to solve the above problems, a corn planting device convenient to control planting depth is provided. SUMMARY

[0005] The utility model provides a corn planting device convenient to control planting depth for above -mentioned problem, solved the traditional hole planting machine when sowing only can rely on the experience of sowing personnel to insert the barrel into the soil at the appropriate position, does not have precision, and the process of manually putting seeds after each sowing is relatively cumbersome, and the working strength is increased.

[0006] The utility model adopts the technical scheme as follows: containing outer cylinder, movable cylinder, screw thread cylinder, blocking disc, placing plate, vertical mounting plate, seed storage box, driving mechanism, operating mechanism;

[0007] The movable cylinder is slidably arranged in the outer cylinder, and the movable cylinder is driven to slide by the operating mechanism;

[0008] The upper end of the outer cylinder is fixed with a vertical mounting plate on each side.

[0009] A placing plate is fixed on the front wall of the two vertical mounting plates, and a seed storage box is detachably arranged on the upper end of the placing plate.

[0010] The seed storage box is provided with a driving mechanism for driving the corn seeds.

[0011] The dialing mechanism is driven by the operating mechanism to work;

[0012] The outer side wall of the outer cylinder is threadedly sleeved with a threaded cylinder;

[0013] The lower end of the threaded cylinder is fixedly provided with a blocking disc, which is rotatably sleeved on the outer side of the outer cylinder;

[0014] The movable cylinder is communicated with the seed storage box through sliding.

[0015] Further, the rear wall of the seed storage box is a semicircular arc surface matched with the outer wall of the outer cylinder;

[0016] The lower end of the semicircular arc surface is provided with a first through hole;

[0017] The front wall of the outer cylinder is provided with a second through hole at the upper end, and the first through hole and the second through hole are communicated;

[0018] The front wall of the movable cylinder is provided with a third through hole at the upper end, and the third through hole and the second through hole are detachably contacted;

[0019] The front wall of the movable cylinder is provided with a fourth through hole at the lower end, and the fourth through hole and the inner side wall of the lower end of the outer cylinder are detachably contacted.

[0020] Further, the operating mechanism comprises a movable block, a guide column, a reset spring, a movable handle and a fixed handle;

[0021] The rear wall of the outer cylinder is fixedly provided with a fixed handle, and the movable handle is movably arranged above the fixed handle;

[0022] The movable handle is fixedly arranged on the rear wall of the movable cylinder;

[0023] The rear wall of the outer cylinder is provided with a first rectangular through slot;

[0024] The movable handle is slidably arranged through the first rectangular through slot;

[0025] The movable block is fixedly arranged at the upper end of the two sides of the movable cylinder;

[0026] The lower end of each of the two movable blocks is fixedly provided with a guide column, and the upper end of each of the two vertical mounting plates is provided with a guide groove matched with the guide column, and the two guide columns are slidably arranged in the two guide grooves;

[0027] The outer side of each of the two guide columns is sleeved with a reset spring, and the head and tail ends of the two reset springs are fixedly connected with the bottom wall of the movable block and the top wall of the vertical mounting plate close to the movable block;

[0028] Two said movable blocks drive the dialing mechanism to work by sliding respectively.

[0029] Further, the dialing mechanism comprises a connecting rod, a spur gear, a rack plate, a rectangular slide, a disc, and a dialing column.

[0030] First connecting columns are fixed on the outer walls of the two movable blocks respectively, and the first ends of the connecting rods are rotatably sleeved on the two first connecting columns respectively.

[0031] Second rectangular through grooves are arranged on the left and right side walls of the placing plate respectively.

[0032] Rectangular slides are slidably arranged in the two second rectangular through grooves respectively.

[0033] Second connecting columns are fixed on the outer side walls of the two rectangular slides respectively.

[0034] The second ends of the two connecting rods are rotatably sleeved on the two second connecting columns respectively.

[0035] Rack plates are fixed on the outer walls of the two rectangular slides respectively, and the two rack plates are movably arranged outside the left and right side walls of the placing plate.

[0036] Spur gears are meshed on the upper ends of the two rack plates respectively.

[0037] The two spur gears are rotatably arranged outside the left and right side walls of the seed storage box through shafts.

[0038] Discs are rotatably arranged through the left and right side walls of the seed storage box respectively.

[0039] A plurality of dialing columns are arranged at equidistant positions on the inner walls of the two discs.

[0040] Further, the lower end of the movable cylinder is provided with a pointed cone body for facilitating the entry into the soil.

[0041] Further, a plurality of scale lines for measuring the depth are arranged on the side wall of the outer cylinder body, and the blocking disc is detachably contacted between the plurality of scale lines.

[0042] The advantages of the present application are as follows:

[0043] In the present application, the height of the blocking disc can be controlled by rotating the threaded cylinder. After the height of the blocking disc is adjusted, the outer cylinder body is inserted into the soil to make the blocking disc resist the ground, and then the sowing can be performed. Since the blocking disc is fixed, the depth of the outer cylinder body sinking into the soil is also fixed, thereby fixing the planting depth. The present application can automatically sow seeds during sowing by operating the mechanism, thereby avoiding the problem of time-consuming and labor-intensive caused by frequent manual sowing. The dialing mechanism of the present application can stir the seeds in the seed storage box during sowing, thereby avoiding the blockage.

[0044] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages, which will be further explained below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings constituting a part of this application are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the explanation thereof are used to explain the utility model, and do not constitute undue limitation on the utility model.

[0046] Figure 1 It is the overall structure schematic view of the utility model;

[0047] Figure 2 It is the overall structure schematic view of the utility model operating mechanism;

[0048] Figure 3 It is the working principle schematic view of the utility model driving mechanism;

[0049] Figure 4 It is the overall structure schematic view of the utility model driving mechanism;

[0050] Figure 5 It is the overall structure schematic view of the utility model storage box;

[0051] Figure 6 It is the overall structure schematic view of the utility model outer cylinder;

[0052] Figure 7 It is the upper end structure schematic view of the utility model movable cylinder;

[0053] Figure 8 It is the lower end structure schematic view of the utility model movable cylinder;

[0054] Figure 9 It is the installation side sectional schematic view of the utility model;

[0055] Figure 10 It is the installation schematic view of the utility model movable cylinder and outer cylinder.

[0056] Reference signs:

[0057] 1 is outer cylinder, 2 is movable cylinder, 3 is sharp cone, 4 is threaded cylinder, 5 is blocking disc, 6 is vertical mounting plate, 7 is placing plate, 8 is storage box, 9 is fixed handle, 10 is movable handle, 11 is guide column, 12 is return spring, 13 is connecting rod, 14 is straight gear, 15 is rack plate, 16 is rectangular sliding block, 17 is disc, 18 is driving column, 19 is movable block;

[0058] 101 is first rectangular through slot, 102 is second through hole.

[0059] 201 is a third through hole, and 202 is a fourth through hole;

[0060] 701 is a second rectangular through slot;

[0061] 801 is a semicircular surface, and 8011 is a first through hole. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0063] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0064] REFERENCE Figures 1 to 10 A corn planting device facilitating control of planting depth, comprising an outer cylinder 1, a movable cylinder 2, a threaded cylinder 4, a blocking disc 5, a placement plate 7, a vertical mounting plate 6, a seed storage box 8, a poking mechanism, and an operating mechanism.

[0065] The movable cylinder 2 is slidably installed in the outer cylinder 1 and is driven to slide by the operating mechanism. The outer cylinder 1 is used for being inserted into soil, and the movable cylinder 2 is used for conveying corn seeds to be planted.

[0066] Vertical mounting plates 6 are fixedly installed on both sides of the upper end of the outer cylinder 1.

[0067] The same placement plate 7 is fixedly installed on the front wall of the two vertical mounting plates 6. The seed storage box 8 is detachably installed on the upper end of the placement plate 7. The two vertical mounting plates 6 are used for connecting the placement plate 7 and the outer cylinder 1 together. The seed storage box 8 is used for storing corn seeds to be planted.

[0068] The poking mechanism for poking corn seeds is installed in the seed storage box 8, which avoids blockage of the corn seeds in the seed storage box 8.

[0069] The poking mechanism is driven to work by the operating mechanism.

[0070] The threaded cylinder 4 is threadedly sleeved on the outer side wall of the outer cylinder 1.

[0071] The lower end of the threaded cylinder 4 is fixedly installed with a blocking disc 5, which is rotatably sleeved outside the outer cylinder body 1. By rotating the threaded cylinder 4, the blocking disc 5 can be fixed at a position away from the ground on the outer cylinder body 1. By inserting the threaded cylinder 4 into the soil and making the adjusted blocking disc 5 abut against the upper end of the soil, the sowing depth can be limited.

[0072] The movable cylinder 2 is connected with the seed storage box 8 through sliding. During the sliding process, the movable cylinder 2 is periodically connected with the seed storage box 8. When connected, the corn seeds in the seed storage box 8 fall into the movable cylinder 2 from the connection position and then fall into the soil through the movable cylinder 2 to complete sowing.

[0073] The rear wall of the seed storage box 8 is a semicircular arc surface 801 matched with the outer wall of the outer cylinder body 1.

[0074] The lower end of the semicircular arc surface 801 is provided with a first through hole 8011.

[0075] The upper end of the front wall of the outer cylinder body 1 is provided with a second through hole 102. The first through hole 8011 and the second through hole 102 are connected.

[0076] The upper end of the front wall of the movable cylinder 2 is provided with a third through hole 201. The third through hole 201 and the second through hole 102 are detachably connected.

[0077] The lower end of the front wall of the movable cylinder 2 is provided with a fourth through hole 202. The fourth through hole 202 and the inner side wall of the lower end of the outer cylinder body 1 are detachably connected. The second through hole 102 and the first through hole 8011 are always connected. When the movable cylinder 2 slides in the outer cylinder body 1, the third through hole 201 and the first through hole 8011 are periodically connected. When the third through hole 201 and the first through hole 8011 are connected, the corn seeds in the seed storage box 8 flow into the bottom of the movable cylinder 2 through the first through hole 8011, the second through hole 102 and the third through hole 201, and then flow out of the fourth through hole 202 at the bottom of the movable cylinder 2 into the soil.

[0078] The operating mechanism includes a movable block 19, a guide column 11, a reset spring 12, a movable handle 10 and a fixed handle 9.

[0079] The rear wall of the outer cylinder body 1 is fixedly installed with the fixed handle 9. The upper end of the fixed handle 9 is movably installed with the movable handle 10.

[0080] The movable handle 10 is fixedly installed on the rear wall of the movable cylinder 2.

[0081] The rear wall of the outer cylinder body 1 is provided with a first rectangular through slot 101.

[0082] The movable handle 10 is slidably and penetrably installed in the first rectangular through slot 101.

[0083] The two sides of the upper end of the movable cylinder 2 are respectively fixedly installed with movable blocks 19;

[0084] The lower end of the two movable blocks 19 is respectively fixedly installed with guide columns 11, and the upper end of the two vertical installation plates 6 is respectively provided with a guide groove matched with the guide column 11, and the two guide columns 11 are slidingly installed in the two guide grooves;

[0085] The outer side of the two guide columns 11 is respectively sleeved with a reset spring 12, and the head and tail ends of the two reset springs 12 are respectively fixedly connected with the bottom wall of the movable block 19 and the top wall of the vertical installation plate 6 close to the reset spring 12;

[0086] The two movable blocks 19 are respectively driven by sliding drive driving mechanisms, and the sliding drive driving mechanisms are respectively arranged on the left side and the right side of the placing plate 7, and the two movable blocks 19 are respectively arranged on the left side and the right side of the placing plate 7. Figure 2 The fourth through hole 202 is exposed to the outside of the outer cylinder body 1, and the third through hole 201 and the first through hole 8011 form a communication space, the seed enters the movable cylinder 2 through the third through hole 201 and flows into the soil from the fourth through hole 202, when the user stops pressing the movable handle, the two movable blocks 19 begin to reset upwards under the driving of the two reset springs 12 on the left side and the right side, and the movable cylinder 2 fixedly connected with the two movable blocks 19 also begins to reset upwards, when the movable cylinder 2 resets to the uppermost position, the fourth through hole 202 slides into the outer cylinder body 1 to realize sealing, and the third through hole 201 slides to the upper side of the first through hole 8011 to also realize sealing, it should be noted that at this time, there may still be corn seeds that have not been sown in the movable cylinder 2, but because the movable cylinder 2 is in a sealed space at this time, the seeds in the movable cylinder 2 will not fall off during the process of the user lifting the outer cylinder body 1 to the next sowing site for sowing.

[0087] The driving mechanism comprises a connecting rod 13, a straight gear 14, a rack plate 15, a rectangular sliding block 16, a disc 17 and a driving column 18;

[0088] The outer wall of the two movable blocks 19 is respectively fixedly installed with a first connecting column, and the first end of the connecting rod 13 is rotatably sleeved on the two first connecting columns;

[0089] The left and right side walls of the placing plate 7 are respectively provided with second rectangular through grooves 701;

[0090] The two second rectangular through grooves 701 are respectively slidingly installed with rectangular sliding blocks 16;

[0091] The outer side wall of the two rectangular sliding blocks 16 is respectively fixedly installed with a second connecting column;

[0092] The second ends of the two connecting rods 13 are respectively rotatably sleeved on the two second connecting posts;

[0093] Two rectangular sliders 16 are respectively fixedly installed with rack plates 15 on the upper ends of their outer walls, and the two rack plates 15 are respectively movably arranged on the left and right side walls of the placement plate 7.

[0094] The upper ends of the two rack plates 7 are respectively fitted with spur gears 14;

[0095] Two spur gears 14 are respectively mounted on the left and right side walls of the seed storage box 8 via rotating shafts;

[0096] Two rotating shafts are installed on the left and right side walls of the seed storage box 8, respectively.

[0097] Several actuating posts 18 are installed at equal intervals at eccentric positions on the inner walls of the two discs 17, for reference. Figure 3 and Figure 4 When the two sliding blocks 19 move up and down, they will drive the connecting rods 13 on both sides to deflect. During the deflection, the two connecting rods 13 will drive the rectangular sliders 16 on both sides to slide back and forth along the second rectangular through slots 701 on both sides. During the back and forth sliding, the two rectangular sliders 16 will drive the rack plates 15 fixedly connected to them to slide back and forth. During the back and forth sliding, the two rack plates 15 will drive the spur gears 14 meshing with them on both sides to rotate back and forth. The disc 17 fixedly installed coaxially with the two spur gears 14 will then start to rotate back and forth. Several actuating columns 18 installed at the eccentric position on the inner wall of the disc 17 will also start to rotate around the disc, thereby breaking up the corn seeds to be sown in the seed storage box 8 and preventing the corn seeds from accumulating outside the first through hole 8011. The actuating columns 18 can push the seeds into the first rectangular through hole 8011 by rotation, thereby achieving the effect of transporting the seeds.

[0098] The lower end of the movable cylinder 2 is equipped with a pointed cone 3 that facilitates entry into the soil. The purpose of the cone 3 is to allow the tip of the cone to sink into the soil more easily.

[0099] The outer cylinder 1 has several scale lines installed on its side wall for measuring depth. The blocking disc 5 is detachably in contact with the scale lines, which facilitates precise control of the planting depth.

[0100] The implementation method of this utility model:

[0101] Put an appropriate amount of corn seeds into the seed storage box 8 in this device, and then fix the seed storage box 8 on the placement plate 7. Ensure that the spur gears 14 on both sides of the seed storage box 8 are engaged with the rack plate 15 located below them. The seed storage box 8 is installed on the placement plate 7 by snap-fit.

[0102] The user handheld device moves to the sowing point, adjusts the depth of planting according to the dryness and humidity of the soil, rotates the threaded cylinder 4 by observing the scale line on the side wall of the outer cylinder 1, and makes the threaded cylinder 4 drive the blocking plate 5 to slide on the scale line;

[0103] After adjusting the threaded cylinder 4, the outer cylinder 1 is inserted into the soil at the planting point, and the blocking plate 5 is abutted against the upper end of the soil, so that the lower end of the outer cylinder 1 is the adjusted planting depth;

[0104] When the blocking plate 5 blocks the upper end of the soil, the outer cylinder 1 cannot continue to descend, at this time, the user holds the fixed handle 9 with four fingers, and the thumb presses the movable handle 10, so that the movable cylinder 2 starts to slide downward in the outer cylinder 1, the sharp cone 3 at the lower end of the movable cylinder 2 breaks through the lower end of the outer cylinder 1 and exposes the fourth through slot 202 to contact the soil, and at this time, the plurality of poking columns 18 in the seed storage box 8 start to push the corn seeds in the seed storage box 8 into the movable cylinder 2 from the first through slot 8011, the seeds fall into the soil from the first through slot 8011, the third through slot 201 and finally the fourth through slot 202, at this time, the pressing of the movable handle 10 is stopped, the movable rod 2 starts to lift, and finally the fourth through slot 202 is retracted into the outer cylinder 1 to realize sealing.

[0105] After the sowing at one point is completed, the user lifts the outer cylinder 1 out of the soil and goes to the next sowing site to repeat the above operation to start sowing again.

[0106] In the utility model, the height of the blocking disc can be controlled by rotating the threaded cylinder, the blocking disc is adjusted, the outer cylinder is inserted into the soil to make the blocking disc abut against the ground to sow, since the blocking disc is fixed, the depth of the outer cylinder sinking into the soil is also fixed, so that the planting depth is fixed, the utility model can automatically sow seeds during sowing by the operating mechanism, avoids frequent manual sowing, and solves the problems of time-consuming and laborious.

[0107] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A corn planter for facilitating control of planting depth, characterized by: It comprises an outer cylinder (1), a movable cylinder (2), a threaded cylinder (4), a blocking disc (5), a placing plate (7), a vertical mounting plate (6), a seed storage box (8), a poking mechanism, and an operating mechanism. The outer cylinder (1) is slidably provided with the movable cylinder (2), which is driven to slide by the operating mechanism. The upper end of the outer cylinder (1) is fixedly provided with a vertical mounting plate (6) on each side. A placing plate (7) is fixedly provided on the front wall of the two vertical mounting plates (6), and a seed storage box (8) is detachably provided on the upper end of the placing plate (7). The seed storage box (8) is provided with a poking mechanism for poking corn seeds. The poking mechanism is driven to work by the operating mechanism. The outer side wall of the outer cylinder (1) is threadedly provided with a threaded cylinder (4). The lower end of the threaded cylinder (4) is fixedly provided with a blocking disc (5), which is rotatably provided on the outer side of the outer cylinder (1). The movable cylinder (2) is in communication with the seed storage box (8) through sliding.

2. The corn planter for ease of depth control of claim 1, wherein: The rear wall of the seed storage box (8) is a semicircular arc surface (801) matched with the outer wall of the outer cylinder (1). The lower end of the semicircular arc surface (801) is provided with a first through hole (8011). The upper end of the front wall of the outer cylinder (1) is provided with a second through hole (102), and the first through hole (8011) and the second through hole (102) are in communication. The upper end of the front wall of the movable cylinder (2) is provided with a third through hole (201), and the third through hole (201) and the second through hole (102) are detachably connected. The lower end of the front wall of the movable cylinder (2) is provided with a fourth through hole (202), and the fourth through hole (202) and the inner side wall of the lower end of the outer cylinder (1) are detachably connected.

3. The corn planter for ease of depth control of claim 1, wherein: The operating mechanism comprises a movable block (19), a guide column (11), a return spring (12), a movable handle (10), and a fixed handle (9). The rear wall of the outer cylinder (1) is fixedly provided with a fixed handle (9), and the movable handle (10) is movably provided above the fixed handle (9). The movable handle (10) is fixedly provided on the rear wall of the movable cylinder (2). The rear wall of the outer cylinder (1) is provided with a first rectangular through slot (101). The movable handle (10) is slidably provided through the first rectangular through slot (101). The upper end of each side of the movable cylinder (2) is fixedly provided with a movable block (19). The lower end of each of the two movable blocks (19) is fixedly provided with a guide column (11), and the upper end of each of the two vertical mounting plates (6) is provided with a guide groove matched with the guide column (11), and the two guide columns (11) are slidably provided in the two guide grooves. The outer side of each of the two guide columns (11) is provided with a return spring (12), and the head and tail ends of the two return springs (12) are fixedly connected with the bottom wall of the movable block (19) and the top wall of the vertical mounting plate (6) near them. The two movable blocks (19) drive the poking mechanism to work through sliding.

4. The corn planter for ease of depth control of claim 3, wherein: The toggle mechanism comprises a connecting rod (13), a spur gear (14), a rack plate (15), a rectangular slider (16), a disc (17) and a toggle column (18); First connecting columns are fixedly arranged on the outer walls of two movable blocks (19), and the first ends of the connecting rods (13) are rotatably sleeved on the two first connecting columns; Second rectangular through grooves (701) are arranged on the left and right side walls of the placing plate (7); Rectangular sliders (16) are slidably arranged in the two second rectangular through grooves (701); Second connecting columns are fixedly arranged on the outer side walls of the two rectangular sliders (16); The second ends of the two connecting rods (13) are rotatably sleeved on the two second connecting columns; Rack plates (15) are fixedly arranged on the outer walls of the two rectangular sliders (16), and the two rack plates (15) are movably arranged outside the left and right side walls of the placing plate (7); Spur gears (14) are meshed with the upper ends of the two rack plates (15); The two spur gears (14) are rotatably arranged outside the left and right side walls of the seed storage box (8) through rotating shafts; Discs (17) are rotatably arranged on the left and right side walls of the seed storage box (8) through the rotating shafts; Toggle columns (18) are arranged at equidistant positions on the inner walls of the two discs (17).

5. The corn planter for ease of depth control of claim 1, wherein: The lower end of the movable cylinder (2) is provided with a sharp cone (3) for facilitating soil entry.

6. The corn planter for ease of depth control of claim 1, wherein: Scale lines for measuring depth are arranged on the side wall of the outer cylinder (1), and the blocking disc (5) is detachably contacted between the scale lines.

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