Pesticide bottle

Abstract

The utility model relates to a pesticide bottle which comprises a bottle body, a bottle opening, a bottle shoulder, a bottle body and a bottle bottom are sequentially formed on the bottle body along the axis of the bottle body, a plurality of first concave positions are formed on the peripheral face of the bottle shoulder, the first concave positions are sequentially distributed around the central axis of the bottle shoulder, and each first concave position is of a concave face structure with the lower middle and the higher periphery. A first upper narrowing part, a first middle part and a first lower narrowing part are sequentially formed on the notch outline of the first concave position in the direction of the central axis of the notch outline; the first upper narrowing part is arranged close to the bottle opening, the first lower narrowing part is arranged close to the bottle body, and the first upper narrowing part and the first lower narrowing part are narrowed closer to the central axis of the first middle part along the direction of the central axis of the first middle part and farther away from the first middle part. The utility model has the advantages of simple structure, reasonable design, high structural strength, low possibility of deformation, low possibility of slipping and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid containers, in particular to a pesticide bottle. Background Art

[0002] Plastic bottles are often used to contain liquid chemicals such as pesticides. The bottle body of the existing plastic bottle includes a bottle mouth, a bottle shoulder, a bottle body and a bottle bottom arranged in sequence from top to bottom. Since the diameter size of the bottle mouth is smaller than that of the bottle body, the bottle shoulder of the existing plastic bottle adopts the outer contour structure of a cone. Such a structure results in relatively low structural strength of the bottle shoulder part and is prone to force deformation. Moreover, the chemical is relatively easy to chemically react with the air in the bottle, resulting in a negative pressure environment in the bottle, and further causing the plastic bottle to be sunken and deformed. In addition, due to the outer contour structure of the cone adopted by the bottle shoulder and the smooth surface of the bottle shoulder of the existing plastic bottle, it is easy to slip between the bottle shoulder and the human finger, making it very inconvenient to use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a pesticide bottle, which has the advantages of simple structure, reasonable design, high structural strength, not easy to deform, and not easy to slip, etc.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a pesticide bottle, including a bottle body, the bottle body sequentially forms a bottle mouth, a bottle shoulder, a bottle body and a bottle bottom along its axis. A plurality of first concave positions are formed on the outer peripheral surface of the bottle shoulder, and the plurality of first concave positions are sequentially arranged around the central axis of the bottle shoulder. The first concave position is a concave surface structure with a low middle and high around. The concave opening contour of the first concave position sequentially forms a first upper narrowing part, a first middle part and a first lower narrowing part along its own central axis direction; the first upper narrowing part is close to the bottle mouth, the first lower narrowing part is close to the bottle body, and the first upper narrowing part and the first lower narrowing part are arranged to be closer to the central axis of the first middle part and narrower as they are farther away from the first middle part along the direction of the central axis of the first middle part.

[0005] Working Principle of the Utility Model

[0006] In this solution, a number of first concave positions are provided on the outer peripheral surface of the bottle shoulder. Each first concave position can act as a reinforcing rib to reinforce the structural strength of the bottle shoulder, making the bottle shoulder not easily deformed. By arranging a number of first concave positions around the central axis of the bottle shoulder, the roughness of the outer peripheral surface of the bottle shoulder can also be increased, making it not easy to slip between the bottle shoulder and the human finger, and making it more convenient to use. In addition, each first concave position adopts a concave surface structure with a low middle and high surrounding, and by forming a first upper narrowing part, a first middle part and a first lower narrowing part, the concave opening contour thereof is in a leaf shape with a wide middle and narrow ends, so that the human finger can be embedded in the first concave position, providing a good stress point structure for the human finger and making it more convenient to grasp the bottle shoulder. At the same time, through such a stress point structure, the human finger can more easily apply a rotational force to the bottle body, facilitating the operation of the bottle body. Moreover, the first concave position adopting such a structure is more in line with the ergonomic design, making it more comfortable when the human finger contacts the first concave position.

[0007] Further, in a pesticide bottle as described above, a number of second concave positions are further formed on the outer peripheral surface of the bottle shoulder. The second concave position is a concave surface structure with a low middle and high surrounding. The concave opening contour of the second concave position sequentially forms a second upper narrowing part, a second middle part and a second lower narrowing part along its own central axis direction. The second upper narrowing part is close to the bottle mouth, and the second lower narrowing part is close to the bottle body. The second upper narrowing part and the second lower narrowing part are arranged to be closer to the central axis of the second middle part as they are farther away from the second middle part along the central axis direction of the second middle part. A number of first concave positions and a number of second concave positions are arranged alternately and sequentially around the central axis of the bottle shoulder. The second concave position is on the side of the first concave position close to the bottle body, and a reinforcing rib part is formed between each adjacent first lower narrowing part and second upper narrowing part.

[0008] Further, in a pesticide bottle as described above, the length dimension of the first upper narrowing part is smaller than the length dimension of the first lower narrowing part, and the length dimension of the second upper narrowing part is larger than the length dimension of the second lower narrowing part.

[0009] Further, in a pesticide bottle as described above, a number of first splicing surfaces are formed on the outer peripheral surface of the bottle shoulder around its own central axis. The number of first splicing surfaces are sequentially connected end to end, so that a first friction edge is formed between each adjacent two first splicing surfaces; a number of first concave positions are correspondingly arranged on a number of first splicing surfaces.

[0010] Furthermore, a pesticide bottle as described above also includes a bottle cap, which is detachably connected to the bottle mouth by thread. A plurality of third recesses are formed on the circumferential side surface of the bottle cap, and the plurality of third recesses are arranged in sequence around the central axis of the bottle cap. The third recess is a concave structure with a low middle and high surroundings. The recess contour of the third recess is formed with a third upper narrowing portion, a third middle portion and a third lower narrowing portion in sequence along the direction of its own central axis; the third upper narrowing portion is arranged close to the top end of the bottle cap, and the third lower narrowing portion is arranged close to the bottom end of the bottle cap, and the third upper narrowing portion and the third lower narrowing portion are narrowed as they are farther away from the third middle portion and closer to the central axis of the third middle portion in the direction along the central axis of the third middle portion.

[0011] Furthermore, in a pesticide bottle as described above, a plurality of second splicing surfaces are formed on the circumferential side surface of the bottle cap around its own central axis, and the plurality of second splicing surfaces are sequentially connected end to end so that each two adjacent second splicing surfaces are connected to each other to form a second friction edge; and a plurality of third recesses are arranged on the plurality of second splicing surfaces in a one-to-one correspondence.

[0012] Furthermore, in a pesticide bottle as described above, a plurality of reinforcing layers are arranged in sequence on the outer peripheral surface of the bottle body along its axis at intervals; each reinforcing layer includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs are arranged in sequence in a staggered manner around the axis of the bottle body, the first reinforcing rib is a groove structure formed by an inward depression, each adjacent two first reinforcing ribs are connected by a second reinforcing rib, and the top surface of the second reinforcing rib protrudes from the bottom surface of the adjacent first reinforcing rib.

[0013] Furthermore, in the pesticide bottle as described above, between each two adjacent reinforcement layers: the position of the second reinforcement rib of one reinforcement layer and the position of the second reinforcement rib of the other reinforcement layer are staggered in the direction around the axis of the bottle body.

[0014] Furthermore, in a pesticide bottle as described above, an upper bottle body reinforcement rib is formed at one end of the bottle body close to the bottle shoulder, and a lower bottle body reinforcement rib is formed at one end of the bottle body close to the bottle bottom, and the upper bottle body reinforcement rib and the lower bottle body reinforcement rib are annular groove structures formed by inward depression.

[0015] Furthermore, in a pesticide bottle as described above, the end surface of the bottom of the bottle is inwardly recessed to form a bottom reinforcement rib, and the bottom reinforcement rib is radially arranged along the end surface of the bottom of the bottle; a reinforcement convex rib is formed on the bottom surface of the bottom reinforcement rib, and the reinforcement convex rib is arranged along the central axis of the bottom reinforcement rib.

[0016] The technical solution of the utility model has the following beneficial effects: simple structure, reasonable design, high structural strength, not easy to deform, not easy to slip, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Stereo structure diagram of Embodiment 1;

[0018] Figure 2 Assembly explosion diagram of Embodiment 1;

[0019] Figure 3 Front view of Embodiment 1;

[0020] Figure 4 Stereo structure diagram of Embodiment 2;

[0021] Figure 5 Assembly explosion diagram of Embodiment 2;

[0022] Figure 6 Front view of Embodiment 2;

[0023] Figure 7 is Figure 6 Partial enlarged view of Location A of

[0024] Explanation of reference numerals:

[0025] 1 - Bottle body; 11 - Bottle mouth; 12 - Bottle shoulder; 121 - First concave position; 122 - Second concave position; 123 - Reinforcing rib part; 124 - First friction edge; 13 - Bottle body; 131 - Upper bottle body reinforcing rib; 132 - Lower bottle body reinforcing rib; 133 - First reinforcing rib; 134 - Second reinforcing rib; 14 - Bottle bottom; 141 - Bottom reinforcing rib; 142 - Reinforcing convex rib; 2 - Bottle cap; 21 - Third concave position; 22 - Second friction edge. Detailed implementation manners

[0026] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings.

[0027] Embodiment 1

[0028] As Figures 1 to 3 A pesticide bottle of Embodiment 1 includes a bottle body 1. The bottle body 1 successively forms a bottle mouth 11, a bottle shoulder 12, a bottle body 13, and a bottle bottom 14 along its axis. A plurality of first concave positions 121 are formed on the outer peripheral surface of the bottle shoulder 12. The plurality of first concave positions 121 are arranged in sequence around the central axis of the bottle shoulder 12. The first concave position 121 is a concave surface structure with a lower middle and higher surroundings. The concave opening contour of the first concave position 121 successively forms a first upper narrowing part, a first middle part, and a first lower narrowing part along the direction of its own central axis; the first upper narrowing part is arranged close to the bottle mouth 11, the first lower narrowing part is arranged close to the bottle body 13, and the first upper narrowing part and the first lower narrowing part are arranged to narrow closer to the central axis of the first middle part as they are farther away from the first middle part along the direction of the central axis of the first middle part.

[0029] Working principle of this embodiment:

[0030] In this solution, a number of first recesses 121 are provided on the outer peripheral surface of the bottle shoulder 12. Each of the first recesses 121 can act as a reinforcing rib to strengthen the structural strength of the bottle shoulder 12, making the bottle shoulder 12 not easily deformed. By arranging a number of first recesses 121 around the central axis of the bottle shoulder 12, the roughness of the outer peripheral surface of the bottle shoulder 12 can also be increased, making it not easy for the bottle shoulder 12 to slip with the human finger, and making it more convenient to use. In addition, each of the first recesses 121 adopts a concave surface structure with a low middle and high around, and by forming a first upper narrowing part, a first middle part and a first lower narrowing part, the notch contour thereof is in a leaf shape with a wide middle and narrow ends, so that the human finger can be embedded in the first recess 121, providing a good force point structure for the human finger, making it more convenient to grasp the bottle shoulder 12. At the same time, through such a force point structure, the human finger can more easily apply a rotational force to the bottle body 1, facilitating the operation of the bottle body 1. And, the first recess 121 adopting such a structure is more in line with the ergonomic design, making it more comfortable when the human finger contacts the first recess 121.

[0031] As Figures 1 to 3 shown, this embodiment further includes a bottle cap 2. The bottle cap 2 is detachably connected to the bottle mouth 11 by threads. A number of third recesses 21 are formed on the circumferential side surface of the bottle cap 2. The number of third recesses 21 are arranged in sequence around the central axis of the bottle cap 2. The third recess 21 is a concave surface structure with a low middle and high around. The notch contour of the third recess 21 sequentially forms a third upper narrowing part, a third middle part and a third lower narrowing part along its own central axis direction; the third upper narrowing part is arranged close to the top end of the bottle cap 2, the third lower narrowing part is arranged close to the bottom end of the bottle cap 2, and the third upper narrowing part and the third lower narrowing part are arranged to narrow closer to the central axis of the third middle part in the direction along the central axis of the third middle part. By adding the third recesses 21 on the circumferential side surface of the bottle cap 2, the roughness of the circumferential side surface of the bottle cap 2 can be increased, making it not easy for the bottle cap 2 to slip with the human finger, and the human finger can more easily apply a rotational force to the bottle cap 2, so that when the inside of the bottle is in a negative pressure environment, the bottle cap 2 and the bottle body 1 can be more easily disassembled and separated, making it more convenient to use. In addition, the third recess 21 adopting the above structure is more in line with the ergonomic design, making it more comfortable when the human finger contacts the third recess 21.

[0032] As Figures 1 to 3As shown, at one end of the bottle body 13 close to the bottle shoulder 12, an upper bottle body reinforcing rib 131 is formed. The upper bottle body reinforcing rib 131 is a ring groove structure formed by inward depression. At one end of the bottle body 13 close to the bottle bottom 14, a lower bottle body reinforcing rib 132 is formed. The lower bottle body reinforcing rib 132 is a ring groove structure formed by inward depression. On the end face of the bottle bottom 14, a bottom reinforcing rib 141 is formed by inward depression. The bottom reinforcing rib 141 is arranged radially along the end face of the bottle bottom 14. On the bottom face of the bottom reinforcing rib 141, a reinforcing rib 142 is formed. The reinforcing rib 142 is arranged along the central axis of the bottom reinforcing rib 141. By adding the upper bottle body reinforcing rib 131 and the lower bottle body reinforcing rib 132 to the bottle body 13, and adding the bottom reinforcing rib 141 and the reinforcing rib 142 to the bottle bottom 14, the structural strength of the bottle body 13 and the bottle bottom 14 itself can be enhanced, so that the bottle body 13 and the bottle bottom 14 are not easily dented and deformed due to the negative pressure environment inside the bottle.

[0033] As Figures 1 to 3 shown, on the outer peripheral surface of the bottle shoulder 12, a plurality of first splicing surfaces are formed around its own central axis. The plurality of first splicing surfaces are connected end to end in sequence, so that a first friction edge 124 is formed between every two adjacent first splicing surfaces; a plurality of first concave positions 121 are correspondingly arranged on the plurality of first splicing surfaces. On the circumferential side surface of the bottle cap 2, a plurality of second splicing surfaces are formed around its own central axis. The plurality of second splicing surfaces are connected end to end in sequence, so that a second friction edge 22 is formed between every two adjacent second splicing surfaces; a plurality of third concave positions 21 are correspondingly arranged on the plurality of second splicing surfaces. The first friction edge 124 can increase the friction between the bottle shoulder 12 and the human hand, and the second friction edge 22 can increase the friction between the bottle cap 2 and the human hand. In this way, when the environment inside the bottle is a negative pressure environment, the bottle cap 2 and the bottle body 1 can be more easily disassembled and separated, and it is more convenient to use.

[0034] Embodiment 2

[0035] As Figures 4 to 7A pesticide bottle for Embodiment 2. The difference between Embodiment 2 and Embodiment 1 is that: on the outer peripheral surface of the bottle shoulder 12, a plurality of second concave positions 122 are further formed. The second concave positions 122 are concave surface structures with a lower middle and higher surrounding. Along the direction of its own central axis, the notch contour of the second concave position 122 is successively formed with a second upper narrowing part, a second middle part, and a second lower narrowing part. The second upper narrowing part is arranged close to the bottle mouth 11, and the second lower narrowing part is arranged close to the bottle body 13. The second upper narrowing part and the second lower narrowing part are arranged to be closer to the central axis of the second middle part as they are farther away from the second middle part along the direction of the central axis of the second middle part. The plurality of first concave positions 121 and the plurality of second concave positions 122 are alternately arranged in sequence around the central axis of the bottle shoulder 12. The second concave position 122 is on the side of the first concave position 121 closer to the bottle body 13. A reinforcing rib part 123 is formed between each adjacent first lower narrowing part and second upper narrowing part. The length dimension of the first upper narrowing part is smaller than the length dimension of the first lower narrowing part, and the length dimension of the second upper narrowing part is larger than the length dimension of the second lower narrowing part. Compared with Embodiment 1, the capacity volume of the bottle body 1 in this embodiment is larger, so the diameter difference between the bottle mouth 11 and the bottle body 13 is larger, which makes the lateral span and longitudinal span of the bottle shoulder 12 in this embodiment larger. By adding the second concave positions 122 on the bottle shoulder 12, the structural strength of the bottle shoulder 12 can be further strengthened. And through the staggered arrangement of the first concave positions 121 and the second concave positions 122, the sunken concave surfaces for providing stress points for human fingers can effectively cover the outer peripheral surface of the bottle shoulder 12. At the same time, a plurality of reinforcing rib parts 123 arranged around its central axis can be formed in the middle of the outer peripheral surface of the bottle shoulder 12, further improving the structural strength of the bottle shoulder 12 to be applicable to pesticide bottles with a larger capacity volume, and the applicable range is wider.

[0036] As Figures 4 to 7 shown, on the outer peripheral surface of the bottle shoulder 12, a plurality of first splicing surfaces are formed around its own central axis. The plurality of first splicing surfaces are successively connected end to end, so that a first friction edge 124 is formed between each adjacent two first splicing surfaces. The plurality of first concave positions 121 are correspondingly arranged on the plurality of first splicing surfaces. A first curved surface and a second curved surface are formed on each first splicing surface. The first curved surface and the second curved surface are respectively on both sides of the first lower narrowing part of the first concave position 121. Between each adjacent two first splicing surfaces: the first curved surface on one first splicing surface and the second curved surface on the other first splicing surface are connected and combined to form a second concave position 122. The first friction edge 124 can increase the friction between the bottle shoulder 12 and the human hand, so that when the inside of the bottle is in a negative pressure environment, the bottle cap 2 and the bottle body 1 can be more easily disassembled and separated, and it is more convenient to use.

[0037] As Figures 4 to 6As shown in the figure, a number of reinforcing layers are sequentially arranged at intervals along the axis on the outer peripheral surface of the bottle body 13; each reinforcing layer includes a number of first reinforcing ribs 133 and a number of second reinforcing ribs 134. The number of first reinforcing ribs 133 and the number of second reinforcing ribs 134 are sequentially arranged alternately around the axis of the bottle body 13. The first reinforcing rib 133 is a groove structure formed by inward depression. Each adjacent two first reinforcing ribs 133 are connected by a second reinforcing rib 134. The top surface of the second reinforcing rib 134 protrudes from the bottom surface of its adjacent first reinforcing rib 133. Between each adjacent two reinforcing layers: the positions of the second reinforcing ribs 134 of one reinforcing layer and the positions of the second reinforcing ribs 134 of the other reinforcing layer are arranged staggeredly in the direction around the axis of the bottle body 13. Compared with Embodiment 1, since the capacity and volume of the bottle body 1 in this embodiment are larger, the overall length dimension of the bottle body 13 in this embodiment is larger. By adding the first reinforcing ribs 133 and the second reinforcing ribs 134 to the bottle body 13, the structural strength of the bottle body 13 can be further strengthened to be applicable to pesticide bottles with a larger capacity and volume, and the scope of application is wider.

[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes, combinations and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A pesticide bottle, comprising a bottle body, wherein the bottle body is sequentially formed with a bottle mouth, a bottle shoulder, a bottle body and a bottle bottom along its axis, characterized in that: A plurality of first recesses are formed on the outer peripheral surface of the bottle shoulder, and the plurality of first recesses are arranged in sequence around the central axis of the bottle shoulder. The first recess is a concave structure which is low in the middle and high around. The recess contour of the first recess is formed with a first upper narrowing portion, a first middle portion and a first lower narrowing portion in sequence along the direction of its own central axis; the first upper narrowing portion is arranged close to the bottle mouth, and the first lower narrowing portion is arranged close to the bottle body, and the first upper narrowing portion and the first lower narrowing portion are arranged closer to the central axis of the first middle portion as they are farther away from the first middle portion in the direction along the central axis of the first middle portion.

2. A pesticide bottle as claimed in claim 1, characterized in that: A plurality of second recesses are also formed on the outer peripheral surface of the bottle shoulder, the second recess is a concave structure with a low middle and high surroundings, and the recess contour of the second recess is formed with a second upper narrowing portion, a second middle portion and a second lower narrowing portion in sequence along the direction of its own central axis; the second upper narrowing portion is arranged close to the bottle mouth, and the second lower narrowing portion is arranged close to the bottle body, and the second upper narrowing portion and the second lower narrowing portion are narrowed closer to the central axis of the second middle portion as they are farther away from the second middle portion in the direction along the central axis of the second middle portion; the plurality of first recesses and the plurality of second recesses are arranged in sequence in a staggered manner around the central axis of the bottle shoulder, the second recesses are located on the side of the first recesses close to the bottle body, and a reinforcing rib portion is formed between each adjacent first lower narrowing portion and second upper narrowing portion.

3. A pesticide bottle as claimed in claim 2, characterized in that: The length dimension of the first upper narrowing portion is smaller than the length dimension of the first lower narrowing portion, and the length dimension of the second upper narrowing portion is larger than the length dimension of the second lower narrowing portion.

4. A pesticide bottle as claimed in claim 1, characterized in that: A plurality of first splicing surfaces are formed on the outer peripheral surface of the bottle shoulder around its own central axis, and the plurality of first splicing surfaces are sequentially connected end to end, so that each two adjacent first splicing surfaces are connected to each other to form a first friction edge; and the plurality of first concave positions are arranged on the plurality of first splicing surfaces in a one-to-one correspondence.

5. A pesticide bottle as claimed in claim 1, characterized in that: The bottle cap is also included, which is detachably connected to the bottle mouth by thread. A plurality of third recesses are formed on the circumferential side surface of the bottle cap, and the plurality of third recesses are arranged in sequence around the central axis of the bottle cap. The third recess is a concave structure which is low in the middle and high around. The recess contour of the third recess is formed with a third upper narrowing portion, a third middle portion and a third lower narrowing portion in sequence along the direction of its own central axis; the third upper narrowing portion is arranged close to the top end of the bottle cap, and the third lower narrowing portion is arranged close to the bottom end of the bottle cap, and the third upper narrowing portion and the third lower narrowing portion are narrowed as they are farther away from the third middle portion and closer to the central axis of the third middle portion in the direction along the central axis of the third middle portion.

6. A pesticide bottle as claimed in claim 5, characterized in that: The circumferential side surface of the bottle cap is formed with a plurality of second splicing surfaces around its own central axis, and the plurality of second splicing surfaces are sequentially connected end to end, so that each two adjacent second splicing surfaces are connected to each other to form a second friction edge; and the plurality of third recesses are arranged on the plurality of second splicing surfaces in a one-to-one correspondence.

7. A pesticide bottle as claimed in claim 1, characterized in that: A plurality of reinforcing layers are arranged in sequence on the outer peripheral surface of the bottle body along its axis at intervals; each reinforcing layer includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs are arranged in sequence in a staggered manner around the axis of the bottle body, the first reinforcing rib is a groove structure formed by being recessed inwardly, and each adjacent two first reinforcing ribs are connected by a second reinforcing rib, and the top surface of the second reinforcing rib protrudes from the bottom surface of the adjacent first reinforcing rib.

8. A pesticide bottle as claimed in claim 5, characterized in that: Between two adjacent reinforcement layers: the position of the second reinforcement rib of one reinforcement layer and the position of the second reinforcement rib of the other reinforcement layer are staggered in the direction around the axis of the bottle body.

9. A pesticide bottle as claimed in claim 1, characterized in that: An upper bottle body reinforcing rib is formed at one end of the bottle body close to the bottle shoulder, and a lower bottle body reinforcing rib is formed at one end of the bottle body close to the bottle bottom. The upper bottle body reinforcing rib and the lower bottle body reinforcing rib are annular groove structures formed by inward depression.

10. A pesticide bottle as claimed in claim 1, characterized in that: The end surface of the bottle bottom is inwardly concave to form a bottom reinforcing rib, which is arranged radially along the end surface of the bottle bottom; a reinforcing convex rib is formed on the bottom surface of the bottom reinforcing rib, which is arranged along the central axis of the bottom reinforcing rib.

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