Airflow interference-proof closed type precision balance
Patent Information
- Application Number
- CN202522471225.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-21
AI Technical Summary
[0003]基于上述，本发明人发现存在以下问题：现在的密闭式精密天平为追求密封效果，多采用玻璃罩与天平本体一体成型的设计，玻璃罩作为核心密封部件，直接与天平主体固定连接（如粘接、焊接），无法单独拆卸，但玻璃材质本身脆性大，在日常使用、搬运或样品取放过程中，极易因碰撞、跌落导致破损，而一体成型的结构使得玻璃罩受损后，无法单独更换，整个天平因失去密封防气流功能而无法继续投入使用，只能整体报废，不仅造成设备资源浪费，还大幅增加了使用成本，给用户带来诸多不便
[0007]采用上述进一步方案的有益效果是，密封座的密封槽与密封胶配合，使玻璃罩与天平本体形成初始密封，阻断外部气流；连接组件通过圆筒和撑块对分别固定在玻璃罩与天平本体两侧的连接座进行辅助固定，既增强玻璃罩的安装稳定性，又为二者的分离提供结构基础，当玻璃罩受损时，可通过拆卸连接组件解除固定，使玻璃罩与天平本体分离，避免传统一体化设计中玻璃罩损坏则天平整体报废的问题，实现天平本体的重复利用，降低使用成本。
Smart Images
Figure CN224906111U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of balance technology, specifically a sealed precision balance that is resistant to airflow interference. Background Technology
[0002] A sealed precision balance is a high-precision weighing instrument that isolates the weighing area from external environmental interferences such as airflow, dust, and humidity through a sealed cavity. Its core principle is to create a stable environment for the weighing area using a sealed structure, coupled with a high-sensitivity sensor to achieve milligram-level or even microgram-level accurate weighing. It is widely used in laboratories, pharmaceuticals, electronics, and other scenarios with stringent precision requirements. The sealing structure of this type of balance typically uses a glass cover as its core, combined with a sealing base to form a closed space. This not only blocks indoor airflow (such as air conditioning drafts or airflow generated by people moving around) from disturbing the sample being weighed, but also protects the sample from contamination, which is crucial for ensuring precise weighing.
[0003] Based on the above, the inventors have discovered the following problems: Current sealed precision balances, in pursuit of a sealing effect, mostly adopt a design where the glass cover is integrally molded with the balance body. As the core sealing component, the glass cover is directly fixed to the balance body (such as by bonding or welding) and cannot be disassembled separately. However, glass itself is brittle and is easily damaged by collisions or drops during daily use, handling, or sample handling. The integral molding structure means that once the glass cover is damaged, it cannot be replaced separately. The entire balance loses its sealing and airflow prevention function and cannot continue to be used, and must be scrapped as a whole. This not only wastes equipment resources but also significantly increases the cost of use and causes many inconveniences for users.
[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a sealed precision balance that is resistant to airflow interference, in order to achieve a more practical value. Summary of the Invention
[0005] The purpose of this invention is to provide a sealed precision balance that is resistant to airflow interference, so as to solve the problems mentioned in the background art.
[0006] In view of the above problems, the technical solution proposed by this utility model is as follows: A sealed precision balance designed to prevent airflow interference includes a balance body. A sealing seat is provided on the top surface of the balance body, and a sealing groove is provided inside the sealing seat. A glass cover is bonded to the inside of the sealing groove using sealant. Connecting components are provided on both outer sides of the sealing seat. Each connecting component includes a pair of connecting seats, arranged sequentially from top to bottom. The pair of connecting seats are respectively installed on the glass cover and the outer wall of the balance body. A first collar and a second collar are respectively installed on one side of the outer wall of the pair of connecting seats. A cylinder is provided between the first collar and the second collar. A notch is provided on the outer wall of the cylinder at the end furthest from the second collar. A support block is provided inside the notch, and the bottom surface of the support block is in contact with the top surface of the first collar.
[0007] The beneficial effects of adopting the above-mentioned further solution are that the sealing groove of the sealing seat cooperates with the sealant to form an initial seal between the glass cover and the balance body, blocking external airflow; the connecting assembly uses a cylinder and a support block to assist in fixing the connecting seats that are respectively fixed on both sides of the glass cover and the balance body, which not only enhances the installation stability of the glass cover, but also provides a structural basis for the separation of the two. When the glass cover is damaged, the fixing can be released by disassembling the connecting assembly, so that the glass cover can be separated from the balance body. This avoids the problem that the entire balance is scrapped when the glass cover is damaged in the traditional integrated design, realizes the reuse of the balance body, and reduces the cost of use.
[0008] Furthermore, the top and bottom surfaces of one end of the support block are provided with sliding grooves, and the interior of one end of each of the two sliding grooves is provided with a slider. The outer walls of the two sliders are fixedly connected to the inner top and inner bottom surfaces of one end of the notch. The outer walls of the sliders slide in cooperation with the inner walls of the sliding grooves. The length of the sliding groove is equal to the length by which the support block contracts into the cylinder. The outer wall of one end of the support block is arc-shaped.
[0009] The beneficial effects of adopting the above-mentioned further solution are that the sliding cooperation between the slider and the groove allows the support block to extend and retract smoothly along the notch; the length of the groove limits the retraction stroke of the support block. When the support block protrudes outside the cylinder through the notch, the slider is located at the right end of the groove; when the support block retracts inside the cylinder through the notch, the slider is located at the left end of the groove; when it is necessary to replace the glass cover, the support block can retract smoothly to release the fixation, which facilitates the quick separation of the sealing seat and the glass cover from the balance body.
[0010] Furthermore, a spring is connected to the inner wall of the notch, one end of the spring is fixedly connected to the other end of the support block, and the outer wall of the support block slides in conjunction with the inner wall of the notch.
[0011] The beneficial effect of adopting the above-mentioned further solution is that the spring provides continuous elastic pressure to the support block. When the glass cover is disassembled, the spring can contract and deform with the support block, without hindering the separation action. After separation, it can drive the support block to reset, which facilitates the installation of the new glass cover.
[0012] Further, an external thread is provided at an end of the cylinder away from the support block, an internal thread engaged with the external thread is provided on the inner wall of the second collar, and the end of the cylinder away from the support block is in threaded connection with the second collar.
[0013] The beneficial effect of adopting the above further solution is that, since the cylinder is in threaded connection with the second collar, after the elastic potential energy of the spring in the notch of the cylinder decreases, the cylinder can be directly unscrewed and detached from the second collar to complete the replacement.
[0014] Further, grooves are provided on both sides of the top surface of the glass cover, a top plate is disposed between the pair of grooves, limiting grooves are opened inside both sides of the top plate, a limiting block is disposed inside one end of each of the two limiting grooves, and the outer side walls of the two limiting blocks are fixedly connected to the inner walls of the grooves respectively.
[0015] The beneficial effect of adopting the above further solution is that the cooperation of the top plate, the grooves and the limiting blocks forms an openable and closable sealing structure on the top surface of the glass cover, which not only enhances the overall airflow prevention effect, but also facilitates the taking and placing of samples; the limiting structure ensures that the top plate does not fall off when sliding, and achieves precise sealing when closed.
[0016] Further, a pull handle is mounted at the center of the top surface of the top plate, the pull handle is integrally formed with the top plate, and both the pull handle and the top plate are made of glass material.
[0017] The beneficial effect of adopting the above further solution is that the integrally formed glass pull handle provides a convenient force application point for opening and closing the top plate, making labor-saving operation; the glass material matches the glass cover, which ensures the consistency of top surface sealing and does not affect weighing observation.
[0018] Further, the sealing seat is in a shape of a Chinese character "回", a tray for weighing is disposed at the center of the top surface of the balance body, a display screen for displaying weighing data is mounted at the front end of the balance body, and buttons for operating the balance body are arranged on the display screen.
[0019] The beneficial effect of adopting the above further solution is that the "回"-shaped sealing seat cooperates with the glass cover and the top plate to form a fully enclosed cavity surrounding the tray, which minimizes airflow interference without affecting the weighing of the middle tray; the tray located at the center ensures weighing accuracy, and the external display screen and buttons are convenient for operation, avoiding airflow disturbance caused by contacting the cavity. When the glass cover is separated, the core components (tray, display screen, buttons) of the balance body remain intact.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This airtight precision balance, which prevents airflow interference, uses a sealing groove in the sealing seat and sealant to form an initial seal between the glass cover and the balance body, blocking external airflow; the connecting assembly uses a cylinder and a support block to assist in fixing the connecting seats that are respectively fixed on both sides of the glass cover and the balance body; when the glass cover is damaged, the support block can be squeezed, and the support block can smoothly extend and retract along the notch. The length of the slide groove limits the retraction stroke of the support block. When the support block retracts into the cylinder through the notch, the slider is located at the left end of the slide groove. By disassembling the connecting assembly, the fixation can be released, allowing the glass cover to separate from the balance body. This avoids the problem of the entire balance being scrapped when the glass cover is damaged in the traditional integrated design, enabling the balance body to be reused and reducing the cost of use. Attached Figure Description
[0021] Figure 1 A three-dimensional structural diagram of a sealed precision balance designed to prevent airflow interference, provided by this utility model; Figure 2 An exploded three-dimensional structural diagram of a sealed precision balance designed to prevent airflow interference, provided by this utility model. Figure 3 An exploded three-dimensional structural diagram of the sealing seat and glass cover of a sealed precision balance for preventing airflow interference provided by this utility model. Figure 4 A cross-sectional schematic diagram of the first and second rings of a sealed precision balance designed to prevent airflow interference, provided by this utility model. Figure 5 A front cross-sectional view of the connecting component of a sealed precision balance designed to prevent airflow interference, provided by this utility model.
[0022] In the diagram: 1. Balance body; 2. Sealing seat; 3. Sealing groove; 4. Glass cover; 5. Connecting assembly; 51. Connecting seat; 52. First collar; 53. Second collar; 54. Cylinder; 55. Support block; 56. Slide groove; 57. Spring; 6. Top plate; 7. Limiting groove; 8. Limiting block; 9. Pull handle. Detailed Implementation
[0023] 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.
[0024] Please see Figures 1-5This utility model provides a technical solution: a sealed precision balance to prevent airflow interference, comprising a balance body 1, a sealing seat 2 on the top surface of the balance body 1, a sealing groove 3 inside the sealing seat 2, and a glass cover 4 bonded to the inside of the sealing groove 3 with sealant; connecting components 5 are provided on both sides of the outer side of the sealing seat 2, each connecting component 5 including a pair of connecting seats 51, arranged sequentially from top to bottom, the pair of connecting seats 51 being respectively installed on the glass cover 4 and the outer wall of the balance body 1, a first collar 52 and a second collar 53 being respectively installed on one side of the outer wall of the pair of connecting seats 51, and a circular groove between the first collar 52 and the second collar 53. The cylinder 54 has a notch on its outer wall at the end away from the second ring 53. A support block 55 is provided inside the notch, and the bottom surface of the support block 55 is in contact with the top surface of the first ring 52. The sealing groove 3 of the sealing seat 2 cooperates with the sealant to form an initial seal between the glass cover 4 and the balance body 1, blocking external airflow. The connecting assembly 5 provides auxiliary fixation to the connecting seats 51, which are respectively fixed on both sides of the glass cover 4 and the balance body 1, through the cylinder 54 and the support block 55. This not only enhances the installation stability of the glass cover 4, but also provides a structural basis for the separation of the two. When the glass cover 4 is damaged, the fixing can be released by disassembling the connecting assembly 5, so that the glass cover 4 can be separated from the balance body 1.
[0025] The support block 55 has grooves 56 on both the top and bottom surfaces at one end. Each groove 56 has a slider inside its interior. The outer walls of the two sliders are fixedly connected to the inner top and bottom surfaces of the notch at one end. The outer walls of the sliders slide in conjunction with the inner walls of the grooves 56. The length of the grooves 56 is equal to the length by which the support block 55 retracts into the cylinder 54. The outer wall of one end of the support block 55 is arc-shaped. When the support block 55 protrudes out of the cylinder 54 through the notch, the slider is located at the right end of the groove 56. When the support block 55 retracts into the cylinder 54 through the notch, the slider is located at the left end of the groove 56. When the glass cover 4 needs to be replaced, the support block 55 can retract smoothly to release the fixation, making it easy for the sealing seat 2 and the glass cover 4 to be quickly separated from the balance body 1.
[0026] The inner wall of the notch is connected to a spring 57. One end of the spring 57 is fixedly connected to the other end of the support block 55. The outer wall of the support block 55 slides in conjunction with the inner wall of the notch. When the glass cover 4 is disassembled, the spring 57 can contract and deform with the support block 55, without hindering the separation action. After separation, it can drive the support block 55 to reset, which facilitates the installation of the new glass cover 4.
[0027] The cylinder 54 has an external thread at the end away from the support block 55, and the inner wall of the second collar 53 has an internal thread that meshes with the external thread. The cylinder 54 is threadedly connected to the second collar 53 at the end away from the support block 55. When the elastic potential energy of the spring 57 in the notch of the cylinder 54 decreases, the cylinder 54 can be loosened directly and removed from the second collar 53 for replacement.
[0028] Wherein, both sides of the top surface of the glass cover 4 are provided with grooves, a top plate 6 is arranged between the pair of grooves, the inside of both sides of the top plate 6 is provided with a limiting groove 7, the inside of one end of each of the two limiting grooves 7 is provided with a limiting block 8, and the outer side walls of the two limiting blocks 8 are fixedly connected with the inner walls of the grooves respectively.
[0029] Wherein, a pull handle 9 is mounted at the center of the top surface of the top plate 6, the pull handle 9 and the top plate 6 are integrally formed, and both the pull handle 9 and the top plate 6 are made of glass; the integrally formed glass pull handle 9 provides a convenient force application point for opening and closing the top plate 6, making the operation labor-saving.
[0030] Wherein, the sealing seat 2 is in a "loop" shape, the center of the top surface of the balance body 1 is provided with a pan for weighing, the front end of the balance body 1 is equipped with a display screen for displaying weighing data, and the display screen is provided with buttons for operating the balance body 1.
[0031] Specifically, the working principle of the closed precision balance resistant to airflow interference is as follows: when in use, first push the top plate 6 through the pull handle 9 on the top surface of the top plate 6, utilize the sliding fit of the limiting blocks 8 and the limiting grooves 7 to open the top plate 6 along the grooves on the top surface of the glass cover 4 to expose the internal pan, then place the sample to be weighed stably on the pan, push the pull handle 9 in the reverse direction to close the top plate 6, the limiting blocks 8 and the limiting grooves 7 are precisely butted, so that the top plate 6 and the glass cover 4 form a closed structure, which cooperates with the sealing effect of the "loop"-shaped sealing seat 2 and the sealant to construct a fully enclosed cavity surrounding the pan, block the entry of external airflow, and provide a stable environment for precise weighing; operate the buttons at the front end of the balance body 1 to start the weighing function, observe the weighing data in real time through the display screen, the external operation area avoids contact with the cavity to cause airflow disturbance, and ensures data accuracy; when the glass cover 4 is damaged and needs to be replaced, squeeze the support block 55 toward the inside of the cylinder 54, the support block 55 slides along the notch, the sliding groove 56 cooperates with the sliding block to guide it to retract smoothly (the sliding block moves from the right end to the left end of the sliding groove 56 without deviation), and the spring 57 retracts and deforms synchronously. After the support block 55 is completely retracted into the cylinder 54, the glass cover 4 and the sealing seat 2 can be separated from the balance body 1 together, the damaged glass cover 4 is removed, the operations of squeezing and releasing the support block 55 are repeated to complete the replacement of the new glass cover 4. If the elastic potential energy of the spring 57 decreases resulting in insufficient supporting force, the cylinder 54 can be directly unscrewed (using its threaded connection with the second collar 53), and the old cylinder 54 can be disassembled and replaced to ensure the connection effect.
[0032] It should be noted that all standard parts used in the present application document can be purchased from the market, and can be customized according to the records of the specification and the accompanying drawings, the specific connection modes of all parts adopt conventional means mature in the prior art such as bolts, rivets, welding, etc., the machinery, parts and equipment adopt conventional models in the prior art, and the present application is mainly used to protect the mechanical device, so the present application will not explain the control mode and circuit connection in detail.
Claims
1. A sealed precision balance resistant to airflow interference, characterized in that, comprising a balance body (1), wherein a sealing seat (2) is arranged on the top surface of the balance body (1), a sealing groove (3) is arranged inside the sealing seat (2), and a glass cover (4) is bonded inside the sealing groove (3) via sealant; connecting assemblies (5) are arranged on both outer sides of the sealing seat (2), each connecting assembly (5) comprises a pair of connecting seats (51), the pair of connecting seats (51) are arranged sequentially from top to bottom, the pair of connecting seats (51) are respectively mounted on the outer walls of the glass cover (4) and the balance body (1), a first sleeve ring (52) and a second sleeve ring (53) are respectively mounted on one side of the outer wall of the pair of connecting seats (51), a cylinder (54) is arranged between the first sleeve ring (52) and the second sleeve ring (53), a notch is formed on the outer wall of one end of the cylinder (54) away from the second sleeve ring (53), a supporting block (55) is arranged inside the notch, and the bottom surface of the supporting block (55) is in fit with the top surface of the first sleeve ring (52).
2. The sealed precision balance for preventing airflow interference according to claim 1, characterized in that, The top surface and the bottom surface of one end of the supporting block (55) are both provided with sliding grooves (56), a sliding block is arranged inside one end of each of the two sliding grooves (56), the outer side walls of the two sliding blocks are fixedly connected with the inner top surface and the inner bottom surface of one end of the notch respectively, the outer wall of the sliding block is in sliding fit with the inner wall of the sliding groove (56), the length of the sliding groove (56) is equal to the retraction length of the supporting block (55) into the cylinder (54), and the outer wall of one end of the supporting block (55) is arc-shaped.
3. A sealed precision balance for preventing airflow interference according to claim 2, characterized in that, The inner side wall of the notch is connected with a spring (57), one end of the spring (57) is fixedly connected with the other end of the supporting block (55), and the outer wall of the supporting block (55) is in sliding fit with the inner wall of the notch.
4. A sealed precision balance for preventing airflow interference according to claim 1, characterized in that, An external thread is arranged at one end of the cylinder (54) away from the supporting block (55), an internal thread engaged with the external thread is arranged on the inner wall of the second sleeve ring (53), and one end of the cylinder (54) away from the supporting block (55) is in threaded connection with the second sleeve ring (53).
5. A sealed precision balance for preventing airflow interference according to claim 4, characterized in that, Grooves are arranged on both sides of the top surface of the glass cover (4), a top plate (6) is arranged between the pair of grooves, limiting grooves (7) are formed inside both sides of the top plate (6), a limiting block (8) is arranged inside one end of each of the two limiting grooves (7), and the outer side walls of the two limiting blocks (8) are fixedly connected with the inner walls of the grooves respectively.
6. A sealed precision balance for preventing airflow interference according to claim 5, characterized in that, A pull handle (9) is mounted at the center of the top surface of the top plate (6), the pull handle (9) and the top plate (6) are integrally formed, and both the pull handle (9) and the top plate (6) are made of glass.
7. A sealed precision balance for preventing airflow interference according to claim 1, characterized in that, The sealing seat (2) is in a "loop" shape, a weighing tray for weighing is arranged at the center of the top surface of the balance body (1), a display screen for displaying weighing data is mounted at the front end of the balance body (1), and buttons for operating the balance body (1) are arranged on the display screen.