Seedling raising box for forestry seedlings

Abstract

The utility model relates to the technical field of forestry seedling raising, and discloses a seedling raising box for forestry seedlings, which comprises a box body, a height adjusting assembly comprises an electric pusher, the outer wall of the electric pusher is fixedly connected to the side wall of the box body, the output end of the electric pusher is fixedly connected with a push rod, the bottom of the inner wall of the box body is fixedly connected with a sliding rail, and the sliding rail is fixedly connected with a sliding block. A plurality of telescopic columns are fixedly connected to the bottom of the inner wall of the box body, a bearing plate is fixedly connected to the tops of the telescopic columns, inclined groove plates are fixedly connected to the front side and the rear side of the bottom of the bearing plate, a sliding block is fixedly connected to the top end of a push rod, and guide columns are fixedly connected to the outer walls of the left side and the right side of the sliding block. The electric pusher drives the push rod to retract, so that the sliding block moves along the guide columns and drives the guide columns on the two sides to move synchronously, the guide columns cooperate with the inclined groove plate, the bearing plate drives seedlings and the telescopic columns to move downwards, the problem that traditional seedling raising space is fixed, and seedling stretching is limited is solved, and the seedling raising quality and the survival rate are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of forestry seedling raising, especially to a seedling raising box for forestry seedlings. BACKGROUND

[0002] In the field of forestry seedling raising, the seedling raising box, as a key facility for cultivating seedlings, shoulders the heavy responsibility of providing suitable growth environment for seedlings and helping their healthy growth. With the continuous development of modernization and refinement of the forestry industry, the demand for high-quality seedlings is increasing day by day. The performance of the seedling raising box directly affects the success of seedling raising and the subsequent reserve of forestry resources. During the growth process of forestry seedlings, different stages have different requirements for space, nutrients, humidity, and other conditions. From the delicate care in the germination period to the changing needs for sufficient stretching space and balanced nutrient supply in the vigorous growth stage, the scientificity and adaptability of the seedling raising box design are tested.

[0003] Traditional forestry seedling raising boxes mostly use relatively simple and fixed mechanical structures. The box body is usually made of wood or ordinary plastic materials. The internal space is regular and single, and there is no place for flexible adjustment. In the part for placing seedlings, it is only a static tray or a fixed compartment. For irrigation, it is common to use artificial hand-held sprinklers or simple drip irrigation devices. Artificial sprinklers rely on manual operation and are difficult to control the spraying force, range, and uniformity, which can easily cause local water accumulation or missed dry areas. Although simple drip pipes have certain advantages in directional water supply, the flow regulation is rough, and it is also difficult to ensure that each seedling accurately receives water and fertilizer. The overall technology lacks precise control and automation mechanism.

[0004] Currently, the seedling raising box has the problem that the internal seedling growth space is fixed and cannot be adjusted according to the growth stage of the seedlings. After the seedlings break through the soil from germination, the growth rate gradually accelerates, the root system continuously deepens downward, and the stems and leaves continue to expand to the four directions. However, in a fixed space, the stem and leaf part will be difficult to freely extend due to limited upper space, resulting in undesirable forms such as overgrowth, thinness, and easy lodging, which seriously affects the photosynthetic efficiency and overall stress resistance of the seedlings, causing the quality of the cultivated seedlings to be poor and the survival rate to be difficult to improve, which cannot meet the high standard requirements of modern forestry for high-quality seedlings. Therefore, a seedling raising box for forestry seedlings is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a seedling raising box for forestry seedlings, which aims to improve the problem of fixed system seedling space and limited seedling stretching in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of nursery box for forestry seedling, including box, environmental regulation assembly is provided in the top of the inner wall of the box, the environmental regulation assembly is used to adjust the ventilation and illumination inside the nursery box, height adjustment assembly is provided in the bottom of the inside of the box, the height adjustment assembly is used to adjust the height of nursery box internal component;

[0008] The height adjustment assembly includes an electric pusher, the outer wall of the electric pusher is fixedly connected to the side wall of the box, a push rod is fixedly connected to the output end of the electric pusher, a slide rail is fixedly connected to the bottom of the inner wall of the box, a plurality of telescopic columns are fixedly connected to the bottom of the inner wall of the box, the telescopic columns are arrayed on the bottom of the inner wall of the box, a load plate is fixedly connected to the top of the telescopic columns, a plurality of limiting grooves are formed in the top of the load plate, the limiting grooves are arrayed on the top of the load plate, inclined chute plates are fixedly connected to the front and rear sides of the bottom of the load plate, a slide block is fixedly connected to the top end of the push rod, the inner wall of the slide block is slidably connected to the outer wall of the top of the slide rail, guide columns are fixedly connected to the left and right sides of the outer wall of the slide block, and the outer wall of the guide columns is slidably connected to the inner wall of the inclined chute plates.

[0009] As a further description of the above technical solution:

[0010] The environmental regulation assembly includes a lighting lamp, the lighting lamp is fixedly connected to the top of the inner wall of the box, the lighting lamps are arrayed on the top of the inner wall of the box, air inlet and outlet fans are fixedly connected to the left and right sides of the inner wall of the box, and a box door is rotatably connected to the side wall of the box.

[0011] As a further description of the above technical solution:

[0012] A liquid pump is fixedly connected to the top of the outer wall of the box, the output end of the liquid pump is fixedly connected to the inside of the box, a water pipe is fixedly connected to the input end of the liquid pump, a water tank is fixedly connected to the side wall of the box, and one end of the water pipe is fixedly connected to the top of the water tank.

[0013] As a further description of the above technical solution:

[0014] A plurality of fixing strips are fixedly connected to the top of the inner wall of the box, the fixing strips are located between the intervals of the lighting lamps, and the fixing strips are arrayed on the top of the inner wall of the box.

[0015] As a further description of the above technical solution:

[0016] A plurality of drive motors are fixedly connected inside the fixing strips, discs are fixedly connected to the output ends of the drive motors, and connectors are rotatably connected to the bottoms of the discs.

[0017] As a further description of the above technical solution:

[0018] The fixed strip bottom is fixedly connected with a plurality of support arms, the support arms are located on the left and right sides of the driving motor, and inner walls of the support arms are fixedly connected with connecting columns;

[0019] As a further description of the above technical solutions:

[0020] The connecting column outer wall is rotatably connected with left-right symmetrical connecting arms, inner walls of the connecting arms are fixedly connected with a cross beam, and the cross beam outer wall is slidably connected in the connector inner wall.

[0021] As a further description of the above technical solutions:

[0022] The connecting arm bottom is fixedly connected with a liquid sprayer, a plurality of connecting pipes are fixedly connected to the liquid sprayer side wall, and one end of the connecting pipe is fixedly connected to the fixed strip bottom.

[0023] The utility model has the advantages of the following beneficial effects:

[0024] 1、In the utility model, the electric pusher drives the push rod to retract, which promotes the displacement of the sliding block along the guide column and the synchronous movement of the two side guide columns. Under the synergistic effect of the guide column guide and the inclined groove of the inclined groove plate, the bearing plate slowly moves downward, the seedlings and the telescopic column also sink, the height of the bearing plate is automatically adjusted, the growth space of the seedlings is flexibly adapted, the problem of fixed space and limited seedling growth in the later stage of the traditional seedling raising is solved, and the seedling cultivation quality and survival rate are improved.

[0025] 2、In the utility model, the driving motor drives the disc to rotate in the fixed strip, which drives the connector at the bottom to rotate. Under the synergistic cooperation of the cross beam guide, the support arm and the connecting column, the connecting arm on the two sides of the cross beam swings forward and backward, thereby driving the bottom liquid sprayer to swing synchronously. The nutrient solution is sprayed in the form of uniform mist on the seedlings in the box, the problem of uneven artificial spraying leading to unbalanced nutrition of seedlings is solved, and the nutrient absorption efficiency of seedlings is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of a seedling raising box for forestry seedlings is provided for the utility model;

[0027] Figure 2 A structure schematic view of a bearing plate of a seedling raising box for forestry seedlings is provided for the utility model;

[0028] Figure 3 A structure schematic view of an inclined groove plate of a seedling raising box for forestry seedlings is provided for the utility model;

[0029] Figure 4 A structure schematic view of a liquid sprayer of a seedling raising box for forestry seedlings is provided for the utility model.

[0030] LEGEND:

[0031] 1, box; 2, box door; 3, air inlet and exhaust fan; 4, liquid pump; 5, water pipe; 6, water tank; 7, light; 8, fixed strip; 9, bearing plate; 10, limiting groove; 11, electric pusher; 12, push rod; 13, sliding block; 14, guide column; 15, slide rail; 16, inclined chute plate; 17, telescopic column; 18, drive motor; 19, disc; 20, connector; 21, support arm; 22, connecting arm; 23, cross beam; 24, connecting column; 25, liquid sprayer; 26, connecting pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] Reference Figure 1 and Figure 3The utility model provides a kind of embodiment: a kind of seedling box for forestry seedling, including box 1, environmental regulation subassembly is provided with in box 1 inner wall top, environmental regulation subassembly is used to adjust the ventilation and illumination in seedling box inside, box 1 inside bottom is provided with height adjustment subassembly, height adjustment subassembly is used to adjust the height of seedling box inside component;Height adjustment subassembly includes electric pusher 11, electric pusher 11 internal component includes motor, screw rod, nut etc., motor drives screw rod rotation, screw rod and nut transmission cooperation, electric pusher 11 outer wall is fixedly connected in the lateral wall of box 1, electric pusher 11 one end is in the outer wall of box 1, located the bottom of water tank 6, electric pusher 11 output end is fixedly connected with push rod 12, push rod 12 is stainless steel material cylinder rod, box 1 inner wall bottom is fixedly connected with slide rail 15, slide rail 15 is made by stainless steel section bar cutting, it is fixed in the inner wall bottom of box 1, to guarantee the linear sliding of sliding block 13 stable, box 1 inner wall bottom is fixedly connected with multiple telescopic columns 17, telescopic column 17 is made of inner tube and outer tube nesting, outer tube material is aluminum alloy, inner tube material is stainless steel, inner tube can slide in outer tube, it is used to guarantee that bearing plate 9 rises or falls stably, telescopic column 17 is arrayed and distributed in the inner wall bottom of box 1, telescopic column 17 top is fixedly connected with bearing plate 9, bearing plate 9 material is aluminum alloy, has enough strength to support container and seedling weight and is corrosion resistant, bearing plate 9 top is provided with multiple limit grooves 10, limit groove 10 is circular groove structure, its size is designed according to common seedling container specification, so that container can keep stable after embedding, avoid displacement, limit groove 10 is arrayed and distributed in the top of bearing plate 9, bearing plate 9 bottom front and rear sides are all fixedly connected with inclined groove plate 16, inclined groove plate 16 is made of aluminum alloy sheet bending, its inside has inclined groove, push rod 12 top end is fixedly connected with sliding block 13, sliding block 13 is cuboid block, material is aluminum alloy, its bottom inner wall is concave, sliding block 13 inner wall is slidably connected in the top outer wall of slide rail 15, sliding block 13 left and right sides outer wall is all fixedly connected with guide column 14, guide column 14 outer wall is slidably connected in the inner wall of inclined groove plate 16, environmental regulation subassembly includes light 7, light 7 shell is aluminum alloy material, lamp body part is LED lamp pearl composition luminous unit, is connected with internal controller cooperation by circuit, according to setting timing opens and closes and adjusts illumination intensity, guarantees the light condition required for seedling photosynthesis, light 7 top is fixedly connected in the inner wall top of box 1, light 7 is arrayed and distributed in the inner wall top of box 1, box 1 inner wall left and right sides are all fixedly connected with air inlet and exhaust fan 3, air inlet and exhaust fan 3 internal motor drives fan blade rotation, fan blade material is engineering plastic, is turbine, promote air from one side to enter, another side to discharge, realize ventilation function, box 1 lateral wall is rotatably connected with box door 2, box door 2 and box 1 lateral wall are rotatably connected by pin shaft, pin shaft material is stainless steel, to guarantee that connection is firm and rotates smoothly;

[0034] Specifically, in the forestry seedling raising operation, when using the seedling raising box, first, the staff manually exerts force to make the box door 2 make a circular motion around the pin shaft to open, so as to carry out subsequent operations, then the container with plant seedlings is placed inside the limiting groove 10 on the surface of the bearing plate 9, after the placement operation is completed, the staff closes the box door 2 to ensure the sealing of the inside of the box body 1, at this time, the control module inside the equipment will control each module in the box body 1 to work according to the preset parameters, and the air inlet and exhaust fan 3 and the light lamp 7 are started in time to carry out light and ventilation operations on the seedlings, along with the advancement of the growth process of the seedlings, it is necessary to adjust the height of the bearing plate 9 to adapt to the growth space requirement of the seedlings, at this time, the electric pusher 11 inside the equipment starts to work, the electric pusher 11 drives the push rod 12 fixedly connected thereto to retract, the retraction of the push rod 12 drives the top slider 13 to move, the sliding direction of the slider 13 is consistent with the retraction direction of the push rod 12, and the slider 13 moves axially along the slide rail 15, along with the displacement of the slider 13, the guide column 14 slides in the inclined groove of the inclined groove plate 16, and the inclined groove structure and the guide column 14 are matched to drive the bearing plate 9 to displace downward, the bearing plate 9 drives the top seedlings and the array-shaped distribution of the telescopic column 17 at the bottom to displace downward synchronously, so as to complete the height adjustment of the bearing plate 9, achieve the effect of automatically adjusting and adapting the growth space of the seedlings, and ensure the orderly development of the seedling cultivation.

[0035] Reference Figure 2 and Figure 4The outer wall top of the box body 1 is fixedly connected with a liquid pump 4. The liquid pump 4 is used as a power source and a carrying hub of the whole nutrient liquid conveying process. The outer shell of the liquid pump 4 is made of high-strength engineering plastic material, which can resist external environmental erosion and slight vibration during equipment operation. The output end of the liquid pump 4 is fixedly connected inside the box body 1. The liquid pump 4 is connected with the internal components of the box body 1 through a rubber tube. The input end of the liquid pump 4 is fixedly connected with a water pipe 5. The water pipe 5 is made of flexible PVC material and has a certain flexibility to facilitate the arrangement of the pipeline direction. The water pipe 5 can ensure smooth transmission of the nutrient liquid and avoid leakage. The side wall of the box body 1 is fixedly connected with a water tank 6. The water tank 6 is made of transparent plastic plate material. The transparent material is convenient for intuitive observation of the nutrient liquid storage. The shape of the water tank 6 is inverted concave type. The middle bottom recess is used to provide space for the position of the electric pusher 11. One end of the water pipe 5 is fixedly connected to the top of the water tank 6. The top inner wall of the box body 1 is fixedly connected with a plurality of fixed strips 8. The fixed strips 8 are used as the base of the bearing drive, transmission and liquid spraying components. The material is aluminum alloy. The long strip shape is regular and has good strength and heat conductivity, which provides stable support for the components installed thereon. The fixed strips 8 are located between the intervals of the light lamps 7, which do not affect the light distribution and fully utilize the top space of the box body 1. The fixed strips 8 are arrayed on the top inner wall of the box body 1. A plurality of drive motors 18 are fixedly connected inside the fixed strips 8. The output end of the drive motor 18 is fixedly connected with a disc 19. The disc 19 is a circular metal plate made of stainless steel. The bottom of the disc 19 is rotatably connected with a connector 20. The connector 20 is used as a joint component connecting the disc 19 and the cross beam 23. The material is aluminum alloy. The inner wall is slidingly connected with the outer wall of the cross beam 23. The inner wall is polished and smooth. The bottom of the disc 19 is rotatably connected with the connector 20 through a pin shaft. A plurality of support arms 21 are fixedly connected to the bottom of the fixed strips 8. The support arms 21 are long strip metal rods, which provide firm support for the connecting columns 24. The support arms 21 are located on the left and right sides of the drive motor 18. The inner wall bottom of the support arm 21 is fixedly connected with a connecting column 24. The connecting column 24 is a cylindrical metal rod, which penetrates the inner wall of the connecting arm 22 and is rotatably connected therewith. The rotating connection point adopts bearing cooperation to ensure the flexible rotation of the connecting arm 22 around the connecting column 24. The outer wall of the connecting column 24 is rotatably connected with left and right symmetrical connecting arms 22. The top inner wall of the connecting arm 22 is fixedly connected with a cross beam 23. The outer wall of the cross beam 23 is slidingly connected with the inner wall of the connector 20. The bottom of the connecting arm 22 is fixedly connected with a liquid sprayer 25. The liquid sprayer 25 is used as a component assembly for directly spraying nutrient liquid. The main body shell is made of plastic material. A plurality of fine spray holes are formed in the bottom. The side wall of the liquid sprayer 25 is fixedly connected with a plurality of connecting pipes 26. One end of the connecting pipe 26 is fixedly connected to the bottom of the fixed strip 8. The connecting pipe 26 is a flexible rubber pipe, which can ensure stable supply of nutrient liquid.

[0036] Specifically, in the process of forestry seedling cultivation, when the liquid pump 4 is running, the nutrient solution in the water tank 6 is pumped through the water pipe 5 according to the suction force generated by the high-speed rotation of the impeller inside the liquid pump 4, and is delivered to the designated components inside the box body 1, and the subsequent distribution process is started. The nutrient solution is distributed in the related components inside the fixed strip 8 inside the device, and then the drive motor 18 inside the fixed strip 8 starts to drive the disc 19 to rotate, the rotation of the disc 19 promotes the rotation of the connector 20 at the bottom of the disc 19, and in the process of rotating with the disc 19, the connector 20 is guided by the cross beam 23, and is cooperated with the connecting column 24 at the bottom of the cross beam 23 and the bracket arms 21 on both sides to move, under the cooperation of these components, the connecting arms 22 on both sides of the cross beam 23 swing in the front-back direction, and the connecting column 24 is the fulcrum, under the rotation of the connector 20, the front end swings linearly back and forth, and the swing of the connecting arm 22 drives the sprayer 25 at the bottom to swing. A plurality of connecting pipes 26 are fixedly connected to the side wall, under the driving of the connecting arm 22, the sprayer 25 uniformly atomizes and sprays the nutrient solution to the seedlings in the box, so as to achieve the effect of uniformly spraying nutrient solution to the seedlings in the box, meet the multiple needs of the seedlings at different growth stages for nutrition and humidity environment, and help the growth of forestry seedlings.

[0037] Working principle: when using the seedling box, first, the staff opens the box door 2, places the container with plant seedlings in the limiting groove 10 on the surface of the bearing plate 9, and then closes the box door 2, at this time, the device inside will start the air inlet and outlet fan 3 and the light 7 according to the set value, and the seedlings will be lighted and ventilated, as the seedlings grow gradually, the electric pusher 11 inside the device drives the push rod 12 to retract, as the push rod 12 gradually retracts, the sliding block 13 gradually displaces above the guide column 14, the displacement of the guide column 14 also drives the guide columns 14 on both sides to displace together, under the cooperation of the guide column 14 and the inclined chute in the inclined chute plate 16, the bearing plate 9 gradually displaces downward, and drives the seedlings and the telescopic column 17 to displace downward together, so as to complete the adjustment of the height of the bearing plate 9, so as to achieve the effect of automatically adjusting the space required by the growth of the seedlings, at the same time, the liquid pump 4 at the top of the device will draw the nutrient solution required by the growth of the seedlings into the water tank 6 through the water pipe 5, the nutrient solution is distributed in the components inside the fixed strip 8 inside the device, when the seedlings need to supplement the nutrient solution or the humidity in the box is not enough, at this time, the drive motor 18 inside the fixed strip 8 starts to drive the disc 19 to rotate, the rotation of the disc 19 promotes the rotation of the connector 20 at the bottom of the disc 19, under the guidance of the cross beam 23 and the cooperation of the connecting column 24 at the bottom of the cross beam 23 and the bracket arms 21 on both sides, the connecting arms 22 on both sides of the cross beam 23 swing in the front-back direction, and the swing of the connecting arm 22 also drives the sprayer 25 at the bottom to swing, so as to achieve the effect of uniformly spraying nutrient solution to the seedlings in the box.

[0038] It should be pointed out finally that: the above only for the preferred embodiments of the utility model have, and do not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A nursery box for forestry seedlings, comprising a box body (1), characterized in that: The inner wall top of the box (1) is provided with an environment adjusting assembly for adjusting the ventilation and illumination inside the seedling raising box, and the inner bottom of the box (1) is provided with a height adjusting assembly for adjusting the height of the internal components of the seedling raising box. The height adjusting assembly comprises an electric pusher (11) fixedly connected to the side wall of the box (1), an output end of the electric pusher (11) is fixedly connected with a push rod (12), the inner bottom of the box (1) is fixedly connected with a slide rail (15), the inner bottom of the box (1) is fixedly connected with a plurality of telescopic columns (17), the telescopic columns (17) are arrayed on the inner bottom of the box (1), the top of the telescopic column (17) is fixedly connected with a bearing plate (9), a plurality of limiting grooves (10) are formed in the top of the bearing plate (9), the limiting grooves (10) are arrayed on the top of the bearing plate (9), the front and rear sides of the bottom of the bearing plate (9) are fixedly connected with inclined chute plates (16), the top end of the push rod (12) is fixedly connected with a slide block (13), the inner wall of the slide block (13) is slidably connected to the top outer wall of the slide rail (15), the outer walls of the left and right sides of the slide block (13) are fixedly connected with guide columns (14), and the outer walls of the guide columns (14) are slidably connected to the inner walls of the inclined chute plates (16).

2. A nursery box for forestry seedlings according to claim 1, characterised in that: The environment adjusting assembly comprises an illumination lamp (7) fixedly connected to the inner wall top of the box (1), the illumination lamps (7) are arrayed on the inner wall top of the box (1), the left and right sides of the inner wall of the box (1) are fixedly connected with air inlet and outlet fans (3), and the side wall of the box (1) is rotatably connected with a box door (2).

3. A nursery box for forestry seedlings according to claim 2, characterised in that: The outer wall top of the box (1) is fixedly connected with a liquid pump (4), the output end of the liquid pump (4) is fixedly connected to the inside of the box (1), the input end of the liquid pump (4) is fixedly connected with a water pipe (5), the side wall of the box (1) is fixedly connected with a water tank (6), and one end of the water pipe (5) is fixedly connected to the top of the water tank (6).

4. A nursery box for forestry seedlings according to claim 3, characterised in that: The inner wall top of the box (1) is fixedly connected with a plurality of fixed strips (8), the fixed strips (8) are located between the intervals of the illumination lamps (7), and the fixed strips (8) are arrayed on the inner wall top of the box (1).

5. A nursery box for forestry seedlings according to claim 4, characterised in that: A plurality of drive motors (18) are fixedly connected inside the fixed strip (8), the output end of the drive motor (18) is fixedly connected with a disc (19), and the bottom of the disc (19) is rotatably connected with a connector (20).

6. A nursery box for forestry seedlings according to claim 5, characterised in that: A plurality of support arms (21) are fixedly connected to the bottom of the fixed strip (8), the support arms (21) are located on the left and right sides of the drive motor (18), and the inner wall bottom of the support arm (21) is fixedly connected with a connecting column (24).

7. A nursery box for forestry seedlings according to claim 6, characterised in that: The outer wall of the connecting column (24) is rotatably connected with left-right symmetrical connecting arms (22), the inner wall top of the connecting arms (22) is fixedly connected with a cross beam (23), and the outer wall of the cross beam (23) is slidably connected to the inner wall of the connector (20).

8. A nursery box for forestry seedlings according to claim 7, characterised in that: The bottom of the connecting arm (22) is fixedly connected with a liquid sprayer (25), the side wall of the liquid sprayer (25) is fixedly connected with a plurality of connecting pipes (26), and one end of the connecting pipe (26) is fixedly connected to the bottom of the fixed strip (8).

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