Weighing auxiliary device
By designing a weighing auxiliary device including a base, a fixing ring and a spring self-locking mechanism, the problem that it is difficult to directly weigh a non-planar container of the electronic balance, the upright weighing of the container is achieved, and the weighing accuracy and efficiency are improved. Reduces error and cost.
Patent Information
- Application Number
- CN202420712718.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-08
AI Technical Summary
It is difficult to directly weigh containers with non-planar structures at the base, resulting in reduced weighing accuracy and low operating efficiency, and high special weighing machinery costs.
Design a weighing auxiliary device, including a base, a fixing ring and a spring self-locking mechanism, through a flexible contact block and connecting rod structure, the non-planar container can stand upright on the balance, and the spring self-locking mechanism can be used to achieve clamping and loosening of the container. open.
It improves weighing accuracy and efficiency, reduces weighing errors, and reduces costs, making it simple and convenient to operate.
Smart Images
Figure CN222298958U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of weighing, in particular to a weighing auxiliary device. Background Art
[0002] Weighing is a crucial step in analytical experiments and a common, time-consuming task in the laboratory. Weighing errors can have a range of negative consequences during chemical analysis, leading to incorrect results.
[0003] Currently, the primary instrument used is the electronic balance. As one of the most commonly used weighing instruments in laboratories, the electronic balance plays an irreplaceable role in scientific research, analytical chemistry, and quality control. While advances in electronic technology have simplified balance operation and reduced weighing time, external factors still cannot prevent the impact of weighing accuracy.
[0004] An electronic balance primarily consists of a sensor, an electronic module, a display, a housing, and a scale pan. It operates by using the balance of electromagnetic forces to weigh an object. When weighing, the object is placed vertically on the center of the scale pan. The electronic sensor, under pressure, generates an electrical signal, which is amplified and processed by the electronic module before being displayed on the electronic display.
[0005] However, in the process of chemical analysis, in order to simplify operations and reduce sample transfer losses, containers such as centrifuge tubes and flasks are often used to weigh liquids. The bottoms of these containers are often non-planar structures. Generally, the bottoms of flasks are rounded, while the bottoms of centrifuge tubes are pointed. This characteristic makes these containers unable to stand directly on the balance and require the use of other containers (such as beakers or weighing cups) to fix them. This method has limitations. Because the specifications of the containers used in the laboratory are completely inconsistent, once the size of the container used does not match the fixed weighing cup, the operator needs to re-select the beaker or weighing cup according to the actual specifications of the container. This practice greatly reduces the work efficiency of the experimenter and cannot avoid the error caused by the outer edge of the weighing object exceeding the range of the scale pan. Although the use of specialized weighing machinery can effectively solve the above problems, the cost required is relatively high.
[0006] Therefore, it is necessary to design a weighing auxiliary device that can make a container with a non-planar bottom structure stand upright on the weighing platform of an electronic balance to improve the weighing accuracy. Summary of the Invention
[0007] The purpose of the utility model is to solve the deficiencies in the prior art and to provide a weighing auxiliary device which can enable a container with a non-planar bottom structure to stand upright on the weighing pan of an electronic balance to improve weighing accuracy.
[0008] The purpose of the utility model is achieved through the following technical solutions: a weighing auxiliary device, comprising a base, a fixed ring, and a spring self-locking mechanism, wherein a second connecting rod is rotatably connected to the fixed ring, and the spring self-locking mechanism comprises a top rod that can move up and down, a storage seat is provided at the upper end of the top rod, a first connecting rod is provided between the storage seat and the second connecting rod, one end of the first connecting rod is rotatably connected to the storage seat, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod is provided with a flexible contact block;
[0009] The push rod is switched between the upper state and the lower state by pressing the push rod; when the push rod is in the upper state, the flexible contact block is in the open state; when the push rod is in the lower state, the flexible contact block is in the retracted state.
[0010] Preferably, the spring self-locking mechanism also includes a shell, a sleeve, a rotating member, and a spring, the storage seat is arranged in the shell and slides with the shell; the sleeve is arranged in the shell, the push rod is arranged in the sleeve and slides with the sleeve; the lower end of the push rod is provided with a plurality of tooth structures, and the two sides of the tooth structure are respectively provided with oblique tooth surfaces, and a guide cavity is provided in the push rod; the lower end of the sleeve is provided with a plurality of tooth grooves, and a stop end surface is provided between adjacent tooth grooves; the tooth grooves are provided with an oblique groove surface and a straight groove surface; the rotating member includes a columnar body, the columnar body is arranged in the guide cavity, and a guide rib is provided in the circumferential direction of the columnar body, and the upper end of the guide rib is provided with a guide inclined surface so that the upper end of the guide rib is wedge-shaped, and the upper end of the guide rib supports the lower end of the push rod; the inner side of the sleeve is provided with a second guide groove into which the guide rib can extend, and the second guide groove is arranged along the axial direction of the sleeve; the second guide groove is located on the inner side of the oblique groove surface; the spring is arranged between the rotating member and the bottom of the shell;
[0011] When the push rod is in the upper position, the guide rib extends into the second guide groove; when the push rod is in the lower upper position, the upper end of the guide rib presses against the stop end surface.
[0012] Preferably, the flexible contact block is made of foam.
[0013] Preferably, a guide boss is provided on the outer side of the push rod, and a first guide groove is provided on the inner side of the sleeve. The first guide groove is provided along the axial direction of the sleeve, and the guide boss is connected to the first guide groove.
[0014] Preferably, the base and the fixing ring are connected via a support rod.
[0015] Preferably, the base and the shell are connected via a connecting rod.
[0016] Preferably, when in use, the base is placed on the weighing pan of an electronic balance.
[0017] The beneficial effects of the utility model are as follows: the utility model has low cost, can assist the container to be in an upright state during weighing, improves weighing efficiency, is simple, convenient and fast to operate, and reduces weighing errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural diagram of the present utility model.
[0019] Figure 2 It is a cross-sectional view of the present utility model.
[0020] Figure 3 This is a schematic diagram of the structure of the sleeve in one direction.
[0021] Figure 4 It is a structural diagram of the sleeve in another direction.
[0022] Figure 5 Schematic diagram of the structure of the ejector rod.
[0023] Figure 6 Schematic diagram of the structure of the rotating part.
[0024] Figure 7 Schematic diagram of the cooperation between the sleeve, push rod, rotating part and spring.
[0025] Figure 8 Schematic diagram of the device placed on an electronic balance.
[0026] In the figure: 101, base, 102, connecting rod, 103, support rod, 104, fixing ring, 201, first connecting rod, 202, second connecting rod, 203, third connecting rod, 3, flexible contact block, 4, housing, 5, storage seat, 6, sleeve, 601, inclined groove surface, 602, straight groove surface, 603, stop end surface, 604, first guide groove, 605, second guide groove, 7, push rod, 701, guide boss, 702, oblique tooth surface, 8, rotating part, 801, guide rib, 802, guide inclined surface, 9, spring, 10, electronic balance. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.
[0028] like Figures 1 to 8As shown, a weighing auxiliary device includes a base 101, a fixed ring 104, and a spring self-locking mechanism. The fixed ring 104 is rotatably connected to a second connecting rod 202. The spring self-locking mechanism includes a top rod 7 that can move up and down. The top end of the top rod 7 is provided with a storage seat 5. A first connecting rod 201 is provided between the storage seat 5 and the second connecting rod 202. One end of the first connecting rod 201 is rotatably connected to the storage seat 5, and the other end of the first connecting rod 201 is rotatably connected to one end of the second connecting rod 202. The other end of the second connecting rod 202 is provided with a flexible contact block 3. A third connecting rod 203 is provided between the flexible contact block 3 and the second connecting rod 202.
[0029] The push rod 7 is switched between the upper state and the lower state by pressing the push rod 7; when the push rod 7 is in the upper state, the flexible contact block 3 is in the open state; when the push rod 7 is in the lower state, the flexible contact block 3 is in the retracted state.
[0030] The spring self-locking mechanism further includes a housing 4, a sleeve 6, a rotating member 8, and a spring 9. The storage seat 5 is disposed within the housing 4 and slidably engages therewith. The sleeve 6 is disposed within the housing 4, and the push rod 7 is disposed within the sleeve 6 and slidably engages therewith. A guide boss 701 is disposed on the outside of the push rod 7, and a first guide groove 604 is disposed on the inside of the sleeve 6. The first guide groove 604 is disposed along the axial direction of the sleeve 6, and the guide boss 701 is connected to the first guide groove 604. The engagement between the guide boss 701 and the first guide groove 604 allows the push rod 7 and the sleeve 6 to slide relative to each other, but the push rod 7 cannot rotate relative to the sleeve 6.
[0031] The lower end of the push rod 7 is provided with several tooth-like structures, with beveled tooth surfaces 702 on either side. A cylindrical guide cavity is provided within the push rod 7. The lower end of the sleeve 6 is provided with several tooth grooves, with stop surfaces 603 located between adjacent tooth grooves. Stop surfaces 603 are flush with the lowest ends of the tooth grooves. The tooth grooves are provided with beveled groove surfaces 601 and straight groove surfaces 602, with the straight groove surfaces 602 extending axially along the sleeve 6.
[0032] The rotating member 8 includes a columnar body, which is cylindrical and disposed in a guide cavity. The columnar body can both slide axially along the guide cavity and rotate within the guide cavity. A guide rib 801 is provided in the circumferential direction of the columnar body, and the guide rib 801 is disposed along the axial direction of the columnar body. A guide bevel 802 is provided at the upper end of the guide rib 801, so that the upper end of the guide rib 801 is wedge-shaped, and the upper end of the guide rib 801 supports the lower end of the push rod 7. A second guide groove 605 is provided on the inner side of the sleeve 6, into which the guide rib 801 can extend, and the second guide groove 605 is disposed along the axial direction of the sleeve 6. The second guide groove 605 is located on the inner side of the bevel surface 601. The spring 9 is disposed between the rotating member 8 and the bottom of the housing 4.
[0033] When the push rod 7 is in the upper position, the guide rib 801 extends into the second guide groove 605 ; when the push rod 7 is in the lower upper position, the upper end of the guide rib 801 presses against the stop end surface 603 .
[0034] During use, the present invention's base 101 is placed on the scale pan of the electronic balance 10. The base 101 is connected to the retaining ring 104 via a support rod 103. The base 101 is connected to the housing 4 via a connecting rod 102. In this embodiment, the base 101 is annular, with a diameter smaller than the width of the scale pan of the electronic balance 10, and a diameter smaller than the retaining ring. The connecting rod 102 secures the housing 4 to the base 101, ensuring the spring self-locking mechanism remains stable on the scale pan of the electronic balance 10.
[0035] The flexible contact block 3 is made of a flexible material. Preferably, the flexible contact block 3 is made of foam.
[0036] Before weighing, the container is placed on the storage seat 5 and between the flexible contact blocks 3, with the bottom of the container in contact with the upper surface of the storage seat 5. A downward pressure is applied to the container, causing it to press against the storage seat 5 and the push rod 7, thereby pressing the push rod 7, causing the push rod 7 to move downward and into a lower position. As the push rod 7 moves downward, it drives the upper end of the second link 202 inward under the transmission of the first link 201, thereby retracting the flexible contact blocks 3 inward until they are in a retracted position. The retracted flexible contact blocks 3 clamp the sides of the container, allowing the container to stand upright on the weighing pan of the electronic balance 10. After weighing is completed, the container is pressed again. After the push rod 7 is pressed, the push rod 7 moves upward to the upper position. During the upward movement, the push rod 7 drives the upper end of the second link 202 outward under the transmission of the first link 201, causing the flexible contact blocks 3 to be in an open position, thereby releasing the container and allowing it to be removed from the electronic balance 10.
[0037] Among them, Figure 7As shown, the working principle of the spring self-locking mechanism is as follows: after the container to be tested is placed on the storage platform, a downward pressure is applied to the storage platform, and the push rod 7 moves downward along the guide groove and presses the rotating member 8 to move downward. When the upper end of the guide rib 801 on the rotating member 8 is disengaged from the tooth groove on the sleeve 6, the upper end of the guide rib 801 on the rotating member contacts the middle position of one of the bevel tooth surfaces 702 at the lower end of the push rod 7. Under the action of pressure, the upper end of the guide rib 801 is pressed against the bevel tooth surface 702 and moves along the bevel tooth surface. The surface 702 slides toward the root position of the tooth structure. During this process, a torque is generated on the rotating part 8 and the rotating part 8 is forced to rotate relative to the sleeve 6. The guide rib 801 on the rotating part rotates to the stop end surface of the lower end of the sleeve 6 and stays at this plane. At this time, the rotating part is at the lowest height position. Under the action of gravity, the lower end of the push rod 7 contacts the upper end of the guide rib 801. At this time, the push rod 7 is in the lower state, and the flexible contact block 3 is also in the retracted state. The container is clamped by the retracted flexible contact block 3.
[0038] When the weighing is completed, the container is pressed again and the push rod 7 moves downward. Under the action of the beveled tooth surface 702, the rotating part 8 is forced to rotate and the upper end of the guide rib 801 enters the tooth groove and moves along the beveled groove surface 601 toward the bottom of the beveled groove surface 601. During the movement, the guide rib 801 slides into the second guide groove 605 on the inner side of the sleeve 6 and pushes the push rod 7 upward under the action of the spring 9, so that the push rod 7 moves to the upper position. During the upward movement of the push rod 7, the flexible contact block 3 is driven to open, so that the flexible contact block 3 releases the container, and the container can be removed.
[0039] The utility model has low cost, can assist the container to be in an upright state during weighing, improves weighing efficiency, is simple, convenient and fast to operate, and reduces weighing error.
[0040] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.
Claims
1. A weighing auxiliary device, characterized in that: It includes a base, a fixing ring, and a spring self-locking mechanism. The fixing ring is rotatably connected to a second connecting rod. The spring self-locking mechanism includes a top rod that can move up and down. A storage seat is provided at the upper end of the top rod. A first connecting rod is provided between the storage seat and the second connecting rod. One end of the first connecting rod is rotatably connected to the storage seat. The other end of the first connecting rod is rotatably connected to one end of the second connecting rod. A flexible contact block is provided at the other end of the second connecting rod. The push rod is switched between the upper state and the lower state by pressing the push rod; when the push rod is in the upper state, the flexible contact block is in the open state; when the push rod is in the lower state, the flexible contact block is in the retracted state.
2. A weighing auxiliary device according to claim 1, characterized in that: The spring self-locking mechanism also includes a shell, a sleeve, a rotating member, and a spring. The storage seat is arranged in the shell and slidably cooperates with the shell; the sleeve is arranged in the shell, and the push rod is arranged in the sleeve and slidably cooperates with the sleeve; the lower end of the push rod is provided with a plurality of tooth structures, and the two sides of the tooth structures are respectively provided with oblique tooth surfaces, and a guide cavity is provided in the push rod; the lower end of the sleeve is provided with a plurality of tooth grooves, and a stop end surface is provided between adjacent tooth grooves; the tooth grooves are provided with an oblique groove surface and a straight groove surface; the rotating member includes a columnar body, the columnar body is arranged in the guide cavity, and a guide rib is provided in the circumferential direction of the columnar body, and the upper end of the guide rib is provided with a guide inclined surface so that the upper end of the guide rib is wedge-shaped, and the upper end of the guide rib supports the lower end of the push rod; the inner side of the sleeve is provided with a second guide groove into which the guide rib can be extended, and the second guide groove is arranged along the axial direction of the sleeve; the second guide groove is located on the inner side of the oblique groove surface; the spring is arranged between the rotating member and the bottom of the shell; When the push rod is in the upper position, the guide rib extends into the second guide groove; when the push rod is in the lower upper position, the upper end of the guide rib presses against the stop end surface.
3. A weighing auxiliary device according to claim 1, characterized in that: The flexible contact block is made of foam cotton.
4. A weighing auxiliary device according to claim 2, characterized in that: A guide boss is arranged on the outer side of the push rod, and a first guide groove is arranged on the inner side of the sleeve. The first guide groove is arranged along the axial direction of the sleeve, and the guide boss is connected to the first guide groove.
5. A weighing auxiliary device according to claim 1, characterized in that: The base is connected to the fixing ring via a supporting rod.
6. A weighing auxiliary device according to claim 1, characterized in that: The base and the shell are connected via a connecting rod.
7. A weighing auxiliary device according to claim 1, characterized in that: When in use, the base is placed on the weighing pan of an electronic balance.