Discharging dust collection device for quantitative packing scale

By designing a movable and height-adjustable annular tube dust collection device, the dust problem during material feeding of quantitative packaging scales is solved, achieving flexible dust collection effect and applicability, suitable for quantitative packaging scales of different heights.

CN223919641UActive Publication Date: 2026-02-17CHENGDE ASIA & EUROPE NUTS CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202521083679.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-29
Publication Date
2026-02-17
Estimated Expiration
2035-05-29

AI Technical Summary

Technical Problem

Existing quantitative packaging scales are prone to generating dust during material feeding, and the dust collection device is fixedly connected to the packaging scale, making it difficult to use flexibly between quantitative packaging scales of different heights, thus reducing the flexibility and applicability of the dust collection device.

Method used

A material feeding and dust collection device was designed, comprising a base plate, a lifting plate, a vertical guide lifting drive assembly, and a horizontal guide driving assembly. Through the cooperation of these components, the annular tube can be moved, lifted, and adjusted laterally, adapting to the material feeding port of a quantitative packaging scale at different heights and performing full-circle dust collection.

Benefits of technology

It improves the dust collection effect, reduces the phenomenon of blind spots, and enhances the flexibility and applicability of the dust collection device, enabling it to be flexibly used in rotation between quantitative packaging scales of different heights.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223919641U_ABST
    Figure CN223919641U_ABST
Patent Text Reader

Abstract

The utility model discloses a blanking dust collection device for a quantitative packing scale, which comprises a bottom plate, and universal wheels with locks are rotatably mounted at four corners of the bottom of the bottom plate; the lifting plate is arranged above the bottom plate; the vertical guide lifting driving assembly vertically penetrates through the lifting plate and is used for driving the lifting plate to vertically lift; and the transverse guiding and transverse driving assembly is mounted on the lifting plate. According to the utility model, a series of structures are arranged, so that the whole-circle surrounding dust collection can be conveniently carried out on the blanking port of the quantitative packing scale, the surrounding dead angle phenomenon is reduced, the dust collection effect is improved, and the surrounding dust collection height can be conveniently and flexibly moved on site and adjusted according to the positions of blanking ports of quantitative packing scales with different heights; and through the matching mode of movement, lifting adjustment and transverse adjustment, flexible recycling among quantitative packing scales with different heights is facilitated, and the use flexibility and applicability of the dust collection device are improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of quantitative packaging scale technology, specifically a material feeding and dust collection device for quantitative packaging scales. Background Technology

[0002] A quantitative packaging scale is a machine for bagging bulk materials. Many materials sold in bags, such as rice and nuts, can be bagged using a quantitative packaging scale. Automatic quantitative packaging scales are used in automated production and packaging of nuts in industry and agriculture. The entire weighing process is computer-controlled and completed automatically, featuring fast weighing speed, high weighing accuracy, labor saving, simple operation, and convenient maintenance. In almond processing, a quantitative packaging scale is needed for quantitative feeding. Existing quantitative packaging scales for almonds and nuts, such as the SDF25 weighing quantitative packaging scale, can quantitatively feed and package various nuts, grains, and granular products. However, when feeding from the discharge port, dust inside the almonds inevitably scatters outward, easily forming dust particles that pollute the working environment and fail to meet environmental protection processing requirements.

[0003] According to a search report from a novelty search agency, announcement number CN219857683U discloses a feeding and dust collection device for a quantitative packaging scale, including a mounting frame, a packaging scale connected to the top of the mounting frame, and a feeding pipe connected to the discharge port of the packaging scale. A dust collection component is provided at the bottom of the packaging scale via the feeding pipe. The dust collection component is connected to the side wall of the mounting frame through two connecting components. The dust collection component includes two horizontal pipes symmetrically arranged on both sides of the feeding pipe and a connecting pipe horizontally arranged between the two horizontal pipes. This facilitates the formation of a covered dust collection area near the feeding pipe, improves the efficiency of dust absorption, prevents dust from entering the surrounding air, and ensures a safe working environment.

[0004] The aforementioned technology discloses a material feeding and dust collection device for a quantitative packaging scale. By installing a U-shaped tube at the material feeding port of the packaging scale and multiple suction hoods inside the U-shaped tube, it can surround and collect dust in a U-shape during the material feeding process, reducing dust dispersion. However, it has the following shortcomings in use: the method of fixing the dust collection component directly to the packaging scale is quite restrictive, making it difficult to flexibly cycle between quantitative packaging scales of different heights, thus reducing the flexibility and applicability of the dust collection device. In view of this, this application proposes a material feeding and dust collection device for a quantitative packaging scale to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a material feeding and dust collection device for a quantitative packaging scale, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a material feeding and dust collection device for a quantitative packaging scale, comprising:

[0007] The base plate is equipped with lockable casters at each of its four bottom corners;

[0008] The lifting platform is located above the base plate;

[0009] A vertical guide lifting drive assembly, which vertically penetrates the lifting plate and is used to drive the lifting plate to move vertically up and down;

[0010] The transverse guide and transverse drive assembly is mounted on the lifting plate;

[0011] The dust collection and suction assembly for the feed inlet of the quantitative packaging scale is installed between the right side of the horizontal guide drive assembly and the top of the base plate. The horizontal guide drive assembly is used to drive the dust collection and suction assembly for the feed inlet of the quantitative packaging scale to move laterally to the position of the feed inlet of the quantitative packaging scale. The dust collection and suction assembly for the feed inlet of the quantitative packaging scale is used to adjust the height when the lifting plate is raised and lowered so as to adapt to the feed inlet of the quantitative packaging scale at different heights. It is also used to perform dust collection and suction work at the feed inlet of the quantitative packaging scale.

[0012] Preferably, the vertical guide lifting drive assembly includes four vertical guide rods fixed in a rectangular shape to the top of the base plate. The top ends of the four vertical guide rods are fixedly connected to the same top plate. The lifting plate is slidably sleeved on the four vertical guide rods. A support plate located below the lifting plate is fixedly connected between the four vertical guide rods. A screw is rotatably installed at the bottom of the top plate. The lifting plate is threaded onto the screw. A drive motor with an output shaft fixedly connected to the bottom end of the screw is fixedly installed at the bottom of the support plate.

[0013] Preferably, the horizontal guide drive assembly includes a multi-stage electric telescopic rod fixedly installed on the right side of the bottom of the lifting plate. The extended end of the multi-stage electric telescopic rod is fixedly connected to a movable seat. Two horizontal guide rods are fixedly connected to the left side of the movable seat. The lifting plate is slidably sleeved on the two horizontal guide rods. A screw is located between the two horizontal guide rods. The two horizontal guide rods are located between the two front vertical guide rods and the two rear vertical guide rods.

[0014] Preferably, the dust collection assembly for the feeding port of the quantitative packaging scale includes an annular tube fixedly connected to the right side of the movable base. Multiple suction hoods are fixedly connected in an annular pattern on the inner side of the annular tube at equal intervals. A flexible hose is fixedly connected to the bottom left side of the annular tube. A rectangular box is fixedly installed on the top of the base plate. The right side of the rectangular box is fixedly connected to the bottom end of the flexible hose. An exhaust fan is fixedly installed on the left side of the rectangular box. The right side of the exhaust fan is the exhaust port and is configured as a hood-shaped structure. The right side of the exhaust fan is connected to the interior of the rectangular box. A U-shaped frame is movably fitted inside the rectangular box. A filter screen is fixedly installed inside the U-shaped frame. The front side of the U-shaped frame slides out to the front side of the rectangular box and is fixedly connected to a U-shaped handle.

[0015] Preferably, a storage battery is fixedly installed on the top left side of the base plate, and the exhaust fan, drive motor and multi-stage electric telescopic rod are all electrically connected to the storage battery.

[0016] Preferably, the top of the lifting plate has a threaded hole for threaded connection with the screw.

[0017] Preferably, the rectangular box has a rectangular through hole on its front side that is in movable contact with the outside of the herringbone frame, and a counterweight block is rotatably connected to the top front side of the rectangular box. The bottom rear side of the counterweight block is in movable contact with the front side of the herringbone frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. By combining the base plate, lifting plate, horizontal guide drive assembly and the dust collection assembly around the feeding port of the quantitative packaging scale, the dust collection can be carried out around the entire feeding port of the quantitative packaging scale. By carrying out dust collection around the entire port, the phenomenon of dead corners is reduced and the dust collection effect is improved.

[0020] 2. Through the combination of the base plate, lifting plate, horizontal guide drive assembly, dust collection assembly surrounding the feed port of the quantitative packaging scale, vertical guide lifting drive assembly, and lockable casters, the device can be flexibly moved on-site and the height of the annular tube can be adjusted according to the different heights of the feed port of the quantitative packaging scale. This allows the annular tube to be placed outside the feed port of the quantitative packaging scale at different heights for surrounding dust collection. The combination of movable, lifting, and horizontal adjustment makes it easy to use the device flexibly and repeatedly between quantitative packaging scales of different heights, reducing limitations and improving the flexibility and applicability of the dust collection device.

[0021] This utility model features a series of structures that facilitate comprehensive dust collection and suction around the feeding port of a quantitative packaging scale. This comprehensive suction reduces blind spots and improves suction efficiency. Furthermore, it allows for flexible on-site movement and adjustment of the suction height according to the feeding port position of the quantitative packaging scale at different heights. The combination of movable, lifting, and lateral adjustments allows for flexible and cyclical use between quantitative packaging scales of different heights, enhancing the flexibility and applicability of the dust collection device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a material feeding and dust collection device for a quantitative packaging scale proposed in this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0024] Figure 3 This is a front sectional view of the dust collection device for a quantitative packaging scale proposed in this utility model.

[0025] In the diagram: 1. Base plate; 101. Lockable caster wheel; 2. Lifting plate; 3. Top plate; 301. Vertical guide rod; 302. Support plate; 303. Screw; 304. Drive motor; 4. Moving seat; 401. Horizontal guide rod; 402. Multi-stage electric telescopic rod; 5. Ring pipe; 501. Suction hood; 502. Flexible hose; 503. Rectangular box; 504. U-shaped frame; 505. Filter screen; 506. Exhaust fan; 507. Counterweight block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 3 As shown in this embodiment, a material feeding and dust extraction device for a quantitative packaging scale includes:

[0028] The base plate 1 has four locking casters 101 mounted on its bottom corners;

[0029] The lifting platform 2 is positioned above the base plate 1;

[0030] A vertical guide lifting drive assembly vertically penetrates the lifting plate 2 and is used to drive the lifting plate 2 to lift vertically.

[0031] The transverse guide and transverse drive assembly is installed on the lifting plate 2;

[0032] The dust collection and suction assembly for the feed inlet of the quantitative packaging scale is installed between the right side of the horizontal guide drive assembly and the top of the base plate 1. The horizontal guide drive assembly is used to drive the dust collection and suction assembly for the feed inlet of the quantitative packaging scale to move laterally to the feed inlet position of the quantitative packaging scale. The dust collection and suction assembly for the feed inlet of the quantitative packaging scale is used to adjust the height when the lifting plate 2 is raised and lowered so as to adapt to the feed inlet of the quantitative packaging scale at different heights. It is also used to perform dust collection and suction work at the feed inlet of the quantitative packaging scale.

[0033] Specifically, the vertical guide lifting drive assembly includes four rectangular vertical guide rods 301 fixed to the top of the base plate 1. The top ends of the four vertical guide rods 301 are fixedly connected to the same top plate 3. A lifting plate 2 is slidably fitted onto the four vertical guide rods 301. The top of the lifting plate 2 has four vertical guide holes that slide and fit onto the outer sides of the corresponding vertical guide rods 301, thus guiding the vertical sliding of the lifting plate 2. A support plate 302 located below the lifting plate 2 is fixedly connected between the four vertical guide rods 301. A screw 303 is rotatably mounted on the bottom of the top plate 3. A first bearing is fixedly connected to the bottom of the top plate 3, and the inner side of the inner ring of the first bearing is fixedly connected to the outer side of the screw 303, thus providing support for the lifting plate. The effect of rotating the screw 303 is that the lifting plate 2 is threaded onto the screw 303. The top of the lifting plate 2 has a threaded hole that connects to the screw 303. The threaded connection between the screw 303 and the threaded hole facilitates the vertical movement of the lifting plate 2 when the screw 303 rotates. The bottom of the support plate 302 is fixedly equipped with a drive motor 304 whose output shaft is fixedly connected to the bottom of the screw 303. The vertical guide rods 301, the top plate 3, the screw 303, the support plate 302, and the drive motor 304 work together to drive the screw 303 to rotate. The rotation of the screw 303 causes the lifting plate 2 to move vertically up and down on the four vertical guide rods 301.

[0034] Furthermore, the horizontal guide drive assembly includes a multi-stage electric telescopic rod 402 fixedly installed on the bottom right side of the lifting plate 2. The extended end of the multi-stage electric telescopic rod 402 is fixedly connected to a movable seat 4. Two horizontal guide rods 401 are fixedly connected to the left side of the movable seat 4. The lifting plate 2 is slidably sleeved on the two horizontal guide rods 401. The right side of the lifting plate 2 has two horizontal guide holes that are slidably fitted onto the outer side of the corresponding horizontal guide rods 401, which serve to guide the horizontal sliding of the horizontal guide rods 401. A screw 303 is located between the two horizontal guide rods 401. The two horizontal guide rods 401 are located between the two front vertical guide rods 301 and the two rear vertical guide rods 301. The multi-stage electric telescopic rod 402, the horizontal guide rods 401 and the movable seat 4 cooperate to drive the movable seat 4 to move to the right or back to the left. The movable seat 4 drives the horizontal guide rods 401 to slide laterally within the lifting plate 2 to perform horizontal guiding work.

[0035] Furthermore, the dust collection assembly around the feeding port of the quantitative packaging scale includes an annular pipe 5 fixedly connected to the right side of the movable base 4. Multiple suction hoods 501 are fixedly connected and interlocked in an annular pattern along the inner side of the annular pipe 5. A flexible hose 502 is fixedly connected and interlocked to the left side of the bottom of the annular pipe 5. A rectangular box 503 is fixedly installed on the top of the base plate 1. The right side of the rectangular box 503 is fixedly connected to the bottom end of the flexible hose 502. An exhaust fan 506 is fixedly installed on the left side of the rectangular box 503. The right side of the exhaust fan 506 is for suction... The air vent is set as a hood-shaped structure. The right side of the exhaust fan 506 is connected to the interior of the rectangular box 503. A U-shaped frame 504 is movably fitted inside the rectangular box 503. A filter screen 505 is fixedly installed inside the U-shaped frame 504. The front side of the U-shaped frame 504 slides out to the front side of the rectangular box 503 and is fixedly connected to a U-shaped handle. A storage battery is fixedly installed on the top left side of the base plate 1. The exhaust fan 506, the drive motor 304 and the multi-stage electric telescopic rod 402 are all electrically connected to the storage battery.

[0036] The annular tube 5, suction hood 501, flexible hose 502, rectangular box 503, exhaust fan 506, U-shaped frame 504, and filter screen 505 work together. When the movable seat 4 moves laterally, it drives the annular tube 5 to move laterally to the left and right, so that the annular tube 5 moves laterally to the feeding port of the quantitative packaging scale. When the lifting plate 2 moves up and down, it sequentially drives the annular tube 5 to move up and down through the horizontal guide rod 401 and the movable seat 4, so that the height of the annular tube 5 can be adjusted according to the different heights of the quantitative packaging scale's feeding port. This facilitates placing the annular tube 5 outside the quantitative packaging scale's feeding port. The exhaust fan 506 then draws suction from inside the rectangular box 503. The box 503 draws suction into the annular tube 5 through the hose 502. The annular tube 5 extracts relatively light dust and gas from the almond material discharged from the feed port of the quantitative packaging scale through multiple suction hoods 501. After the extracted dust and gas enter the rectangular box 503, the dust is filtered and collected in the U-shaped frame 504 by the filter screen 505, and the gas is discharged by the exhaust fan 506. This achieves the effect of surrounding and collecting dust from the feed port of the quantitative packaging scale. In addition, the lockable caster 101 allows for movement, and the position and height of the annular tube 5 are adjustable, making it convenient to use flexibly and repeatedly between quantitative packaging scales of different heights, improving the flexibility and applicability of use.

[0037] Furthermore, the front side of the rectangular box 503 has a rectangular through hole that movably contacts the outer side of the U-shaped frame 504. A counterweight block 507 is rotatably connected to the top front side of the rectangular box 503. A pin is fixedly connected to the top front side of the rectangular box 503. A circular through hole is opened on the top front side of the counterweight block 507. A second bearing is fixedly fitted inside the circular through hole. The inner ring of the second bearing is fixedly fitted to the outer side of the pin. The pin and the second bearing cooperate to achieve the effect of rotating the counterweight block 507. The bottom rear side of the counterweight block 507 movably contacts the front side of the U-shaped frame 504. The counterweight block 507 is used to obstruct and restrict the U-shaped frame 504. When the counterweight block 507 is moved to one side, the obstruction of the U-shaped frame 504 can be released, so that the U-shaped frame 504 can be pulled forward by the personnel to clean the filter screen 505 and impurities.

[0038] The usage method of this embodiment is as follows: When using the feeding and dust extraction device for the quantitative packaging scale, the four locking casters 101 facilitate the movement of the device. After moving the device to the external quantitative packaging scale, the multi-stage electric telescopic rod 402 is activated in the forward direction to drive the moving seat 4 to move to the right. The moving seat 4 drives the horizontal guide rod 401 to slide to the right on the lifting plate 2 for horizontal guiding work. At the same time, the moving seat 4 drives the annular tube 5 to move to the right. After the annular tube 5 moves to the feeding port of the quantitative packaging scale, the operator closes the multi-stage electric telescopic rod 402 and turns on the exhaust fan 506. The rectangular box 503 is used for suction, and the rectangular box 503 is used to suction the annular tube 5 through the hose 502. The annular tube 5 is used to extract relatively light dust and gas from the almond material discharged from the quantitative packaging scale discharge port through multiple suction hoods 501. The extracted dust and gas enter the rectangular box 503 through the annular tube 5 and the hose 502 in sequence. The dust is blocked and filtered by the filter screen 505 and collected in the U-shaped frame 504. The gas is discharged by the exhaust fan 506. This achieves the effect of encircling and collecting dust from the quantitative packaging scale discharge port. By encircling and collecting dust, the phenomenon of dead corners is reduced and the dust collection effect is improved.

[0039] After use, reverse the multi-stage electric telescopic rod 402 to move the annular tube 5 to the left via the movable seat 4. Additionally, since different quantitative packaging scales have different discharge port heights, if the height of the surrounding vacuuming device needs to be adjusted before use, start the drive motor 304 to drive the screw 303 to rotate. The rotation of the screw 303 causes the lifting plate 2 to slide upwards or downwards on the four vertical guide rods 301. The lifting plate 2 then moves the annular tube 5 up and down via the horizontal guide rod 401 and the movable seat 4 to adjust the height. This allows for convenient height adjustment of the annular tube 5 according to the discharge port position of quantitative packaging scales of different heights. It also facilitates placing the annular tube 5 outside the discharge port of quantitative packaging scales at different heights for surrounding vacuuming. Through the combination of movable, lifting, and lateral adjustment, it allows for flexible and cyclical use between quantitative packaging scales of different heights, improving the flexibility and applicability of the vacuuming device.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dosing packaging scale's dosing dust extraction device, comprising a base plate (1), characterized in that: Include: The bottom plate (1), the bottom four corners of the bottom plate (1) are rotatably installed with universal wheels (101) with locks; Lifting plate (2), arranged above the bottom plate (1); Vertical guide lifting drive assembly, vertically penetrating the lifting plate (2) and used for driving the lifting plate (2) to vertically lift; The horizontal guide horizontal drive assembly is installed on the lifting plate (2); The quantitative packaging scale discharge port surrounding dust suction assembly is installed between the right side of the horizontal guide horizontal drive assembly and the top of the bottom plate (1).

2. The dust suction device for a quantitative packaging scale according to claim 1, characterized in that: The vertical guide lifting drive assembly includes four vertical guide rods (301) fixedly arranged in a rectangular shape on the top of the bottom plate (1), the top ends of the four vertical guide rods (301) are fixedly connected with the same top plate (3), the lifting plate (2) is slidably sleeved on the four vertical guide rods (301), the four vertical guide rods (301) are fixedly connected with the support plate (302) below the lifting plate (2), the bottom of the top plate (3) is rotatably installed with the screw rod (303), the lifting plate (2) is threadedly sleeved on the screw rod (303), and the bottom of the support plate (302) is fixedly installed with the drive motor (304) whose output shaft is fixedly connected with the bottom end of the screw rod (303).

3. A dust suction device for a dosing scale according to claim 2, characterized in that: The horizontal guide horizontal drive assembly includes a multi-stage electric telescopic rod (402) fixedly installed on the bottom right side of the lifting plate (2), the extending end of the multi-stage electric telescopic rod (402) is fixedly connected with the moving seat (4), the left side of the moving seat (4) is fixedly connected with two horizontal guide rods (401), the lifting plate (2) is slidably sleeved on the two horizontal guide rods (401), the screw rod (303) is located between the two horizontal guide rods (401), and the two horizontal guide rods (401) are located between the two vertical guide rods (301) on the front side and the two vertical guide rods (301) on the rear side.

4. The dust suction device for a quantitative packaging scale according to claim 3, characterized in that: The quantitative packaging scale discharge port surrounding dust suction assembly includes an annular pipe (5) fixedly connected to the right side of the moving seat (4), a plurality of air suction covers (501) are fixedly and annularly and equidistantly communicated in the inner side of the annular pipe (5), a hose (502) is fixedly and communicatively connected to the bottom left side of the annular pipe (5), a rectangular box (503) is fixedly installed on the top of the bottom plate (1), the right side of the rectangular box (503) is fixedly and communicatively connected to the bottom end of the hose (502), a dust extraction fan (506) is fixedly installed on the left side of the rectangular box (503), the right side of the dust extraction fan (506) is a dust extraction opening and is arranged in a cover-shaped structure, the right side of the dust extraction fan (506) is in communication with the inside of the rectangular box (503), a back-shaped frame (504) is movably sleeved in the rectangular box (503), a filter screen (505) is fixedly installed in the back-shaped frame (504), and a U-shaped handle is fixedly connected to the front side of the back-shaped frame (504) which slides out to the front side of the rectangular box (503).

5. The dust suction device for a quantitative packaging scale according to claim 2, characterized in that: The top left side of the bottom plate (1) is fixedly installed with a storage battery, the dust extraction fan (506), the drive motor (304) and the multi-stage electric telescopic rod (402) are electrically connected with the storage battery.

6. A dust suction device for a quantitative packaging scale according to claim 2, characterized in that: A threaded hole is formed in the top of the lifting plate (2) and threadedly connected with the screw rod (303).

7. A dust suction device for a quantitative packaging scale according to claim 2, characterized in that: The front side of the rectangular box (503) is provided with a rectangular perforation in movable contact with the outer side of the back-shaped frame (504), and the front side top of the rectangular box (503) is rotationally connected with a counterweight block (507), and the rear side bottom of the counterweight block (507) is in movable contact with the front side of the back-shaped frame (504).

Citation Information

Patent Citations

  • Discharging dust collection device for quantitative packing scale

    CN219857683U