Testing cup positioning device of viscometer and viscometer

Abstract

The invention discloses a test cup positioning device of a viscometer and the viscometer, and belongs to the technical field of viscosity detection equipment. The positioning device comprises a base, a connecting seat, a limiting piece, an elastic piece and an operating piece, and the viscometer comprises a viscosity testing host and the positioning device. The base is provided with an assembling groove, a limiting groove and a mounting groove, the connecting seat is inverted-T-shaped and is provided with a cross-shaped locking structure, the limiting piece is longitudinally assembled in the mounting groove in a sliding mode and is provided with a locking piece, a guide face and a matching groove, the elastic piece provides upward elastic force, and the operating piece is hinged to the base and penetrates through the matching groove. When the connecting base is installed in a sliding mode, the limiting piece is triggered to slide downwards, automatic locking is achieved after alignment, and unlocking is achieved only by shifting the operating piece. The cup blocking part limits direct horizontal placement of the test cup, the operation piece cannot be shifted in the initial state, the elastic force of the elastic piece is selectable, and double irregular operation prevention is achieved. The testing cup is reliably fixed, displacement and shaking are avoided, the detection accuracy is improved, assembly is free of direction limitation, operation is convenient and fast, the device is suitable for viscosity detection of various kinds of fluid, and practicability and popularization value are remarkable.

Description

Technical Field

[0001] This invention belongs to the technical field of viscosity testing equipment, specifically relating to a test cup positioning device for a viscometer and a viscometer. Background Technology

[0002] In the performance testing of fluid media, viscosity is one of the core evaluation indicators, directly affecting the product's suitability for manufacturing processes, its performance, and its quality stability. Viscometers, as key equipment for measuring fluid viscosity, are widely used in quality control and R&D work across various industries, including chemical, materials, electronics, and pharmaceuticals.

[0003] As a core component of a viscometer, the test cup is used to hold the fluid medium to be tested, and its stability during the testing process directly determines the accuracy of the viscosity measurement results. However, most existing viscometers generally lack dedicated test cup fixing measures, relying solely on the stability of the test cup itself or simple support structures for positioning.

[0004] This design has a significant flaw: the test cup lacks effective restraint after placement, making it highly susceptible to displacement or shaking during testing due to external forces, vibrations from equipment operation, or the flow of the liquid being tested. This directly alters the contact state between the viscometer's testing components (such as the rotor) and the medium being tested, such as deviations in the rotor's immersion depth or contact positions from the preset area, leading to measurement errors and severely impacting the accuracy of the test data, thus failing to provide a reliable basis for product quality assessment. Therefore, developing a simple, reliable, and easy-to-operate test cup positioning device to specifically address the problem of easy displacement and shaking of the test cup in existing technologies has significant practical application value for improving the accuracy of viscosity testing data.

[0005] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Summary of the Invention

[0006] To address the technical problem that existing viscometers lack specialized and effective measures for fixing the test cup, leading to displacement and shaking of the test cup due to external forces, vibrations, or the liquid being tested, thus affecting the accuracy of the test data, this invention provides a test cup positioning device and viscometer. Through an innovatively designed integrated "guide-lock-unlock" structure, it achieves automatic adaptation, reliable locking, and convenient unlocking of the test cup, ensuring no displacement or shaking of the test cup during the testing process. This fundamentally guarantees the accuracy of the test data while improving operational convenience and equipment compatibility.

[0007] To achieve the above objectives, one technical solution adopted by the present invention is: A test cup positioning device for a viscometer, comprising: The base has a horizontally penetrating assembly groove and a limiting groove; The connecting seat, when axially slidingly engaged with the assembly groove, restricts the radial movement of the connecting seat along the assembly groove. The connecting seat is connected to the test cup. The connecting seat is provided with a locking structure, which includes a receiving part and a locking part. A limiting member is longitudinally slidably assembled with the base. The limiting member is provided with a locking member and a first guide surface for guiding. The limiting member is provided with a mating groove, and the mating groove has a second guide surface and a third guide surface arranged vertically opposite to each other. An elastic element is disposed between the base and the limiting element, and is used to provide the limiting element with an upward tendency to move; An operating component, the rear side of which is hinged to the base, and the front side of which passes through the mating groove and extends into the limiting groove; In the initial state, the connecting seat is not assembled with the assembly slot. The limiting member is pushed outward by the elastic force of the elastic member through the third guide surface until it abuts against the inner wall of the limiting slot. In this state, the limiting member passes through the assembly slot to the top of the base, and the front end of the operating member does not extend out of the assembly slot or the extension length is insufficient for the user to move it. When the connecting seat slides laterally into the assembly groove until it abuts against the first guide surface, the first guide surface is pressed and drives the limiting member to slide downward against the elastic force of the elastic member, causing the second guide surface to push the operating member to rotate inward. When the receiving part and the locking part are aligned with the limiting member and the locking member respectively, the limiting member is reset upward due to the elastic force until the limiting member and the locking member extend into the receiving part and the locking part respectively, thus achieving locking. In the locked state, the length of the operating member's front end extending out of the assembly groove is sufficient for the user to turn it.

[0008] Furthermore, the shape of the four sides of the connecting seat not being able to be inserted into the assembly groove means that there is no need to distinguish the direction when the connecting seat is slidably assembled along the assembly groove.

[0009] Furthermore, the locking structure is configured as a cross-shaped groove, wherein both the horizontal and vertical sections of the cross-shaped groove can serve as a receiving part and a locking part. When the horizontal section serves as a receiving part, the vertical section serves as a locking part, and when the vertical section serves as a receiving part, the horizontal section serves as a locking part.

[0010] Furthermore, there are two locking members, symmetrically distributed on the front and rear sides of the upper part of the limiting member.

[0011] Furthermore, both ends of the assembly groove extend through the base, and the limiting member is provided with a first guide surface corresponding to both ends of the assembly groove.

[0012] Furthermore, the elastic element is a helical spring, and the lower end of the limiting member is provided with an elastic element receiving groove. The elastic element is embedded in the elastic element receiving groove, with one end abutting against the bottom wall of the elastic element receiving groove and the other end abutting against the inner wall of the base, thereby realizing the reception and positioning of the elastic element.

[0013] Furthermore, the operating element is a rod-shaped structure, and at least one is provided; when there are two operating elements, the two operating elements are symmetrically distributed on both sides of the limiting element, and two mating grooves are provided accordingly, with the two operating elements passing through the mating grooves on the corresponding sides respectively.

[0014] Furthermore, the mating groove is an inclined strip groove, and both the second guide surface and the third guide surface extend outward and downward from the center of the limiting member.

[0015] Furthermore, the top plate of the base has a mounting groove that extends through the bottom of the assembly groove, and the limiting member is longitudinally slidably assembled in the mounting groove.

[0016] A viscometer includes a viscosity testing main unit and a test cup positioning device as described in any one of the above. The viscosity testing main unit is connected to the base of the test cup positioning device via a support mechanism. The portion of the limiting member that extends through the assembly groove to the top of the base is a cup-blocking portion. The test component of the viscosity testing main unit is located directly above the cup-blocking portion. The cup-blocking portion is used to restrict the test cup from lying flat in the base area below the test component.

[0017] The present invention has at least the following beneficial effects: Precisely addressing core pain points: Through an innovatively designed integrated locking structure of "connector + limiter + elastic element + operating element", the problem of insufficient effective constraint on the test cup in existing technologies is specifically solved. It can effectively resist the influence of external force, equipment vibration, the movement of the tested liquid, and the rotation disturbance of the test component, ensuring that the test cup has no displacement or shaking during the test. This fundamentally guarantees the stable contact state between the test component and the tested medium, significantly improving the accuracy of the test data.

[0018] The ease of operation is greatly improved: the matching design of the connector and the assembly slot enables assembly without directional restrictions, and there is no need to deliberately distinguish the installation direction; the assembly slot can pass through in both directions, supporting flexible assembly from both sides; the locking process is automatically triggered without additional operation, and unlocking can be quickly completed by simply turning the operating part. The overall operation is simple and labor-saving, and it is suitable for various application scenarios such as batch testing.

[0019] Excellent safety and prevention of misoperation: The structure of the cup retainer requires the test cup to be assembled and fixed by a special locking structure before it can be placed under the test component. This structure avoids operational errors caused by testing without fixing it, ensuring the reliability of test data and preventing collisions between the test cup and the test component, thus improving the safety of equipment use.

[0020] Excellent adaptability and durability: The structural design of each component allows for flexible replacement space, and the connection method, component shape and type can be adjusted according to actual needs to adapt to test cups of different specifications; the base adopts a hollow structure to balance strength and lightness, the components work together smoothly, the elastic parts are positioned by a special receiving groove, the guide surface ensures accurate movement, the overall structure is stable and durable, and has a long service life. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of a viscometer according to the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 This is a top view of an embodiment of a test cup positioning device for a viscometer according to the present invention; Figure 4 for Figure 3 Sectional view along the BB direction; Figure 5 for Figure 4 Enlarged structural diagram at point D; Figure 6 for Figure 3 A cross-sectional view along the CC direction; Figure 7 for Figure 6 Enlarged structural diagram at point E; Figure 8 This is a schematic diagram of the internal structure of the base in one embodiment of a test cup positioning device for a viscometer according to the present invention; Figure 9 This is a schematic diagram of the connecting seat in one embodiment of the test cup positioning device for a viscometer according to the present invention.

[0022] The meanings of the labels in the attached diagram are as follows: Base 1, assembly groove 11, limiting groove 12, mounting groove 13, connecting seat 2, locking structure 21, receiving part 211, locking part 212, test cup 3, limiting member 4, mating groove 41, second guide surface 411, third guide surface 412, locking member 42, first guide surface 43, elastic member receiving groove 44, elastic member 5, operating member 6, viscosity test host 7, support mechanism 71, test assembly 72. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Reference Figures 1-9 As shown, in this embodiment, the viscometer's test cup positioning device includes a base 1, a connecting seat 2, a limiting member 4, an elastic member 5, and an operating member 6. The invention also includes a viscometer incorporating this positioning device, and the viscometer further includes a viscosity testing host 7. The base 1 supports the viscosity testing host and the test cup 3. It is a hollow structure composed of six plates in all directions (front, back, left, right, up, and down). This structural design ensures the structural strength of the base 1, resists vibrations generated during equipment operation, and achieves a lightweight design, facilitating equipment handling and placement. The base 1 is provided with a horizontally penetrating assembly groove 11, which can penetrate one or both ends horizontally. In this embodiment, both ends of the assembly groove 11 penetrate the base 1 horizontally, so that the connecting seat 2 can be assembled from either the left or right side of the base 1, improving operational flexibility. The assembly groove 11 is designed as an inverted T-shape and penetrates the upper end of the base 1. This shape is the preferred embodiment. Its core function is to adapt to the inverted T-shaped structure of the connecting seat 2, realize the axial sliding assembly of the connecting seat 2 and restrict its radial movement. In other embodiments, the assembly groove 11 can also be designed with other adaptable shapes according to the structure of the connecting seat 2, as long as the same assembly and limiting functions can be achieved. The base 1 is also provided with a limiting groove 12, which is a strip-shaped groove located at the front end of the base 1 and extending laterally. The outer wall of the strip-shaped groove abuts against the operating member 6 to limit its movement. In this embodiment, there are two operating members 6, and two corresponding limiting grooves 12 are provided to fit the two operating members 6 respectively. This design can improve the longitudinal strength of the front part of the base 1 and avoid excessive local stress concentration in the base 1. In other embodiments, when there are two operating members 6, they can also share a long strip-shaped groove, as long as the rotation angle of the operating member 6 can be limited. The top plate of the base 1 has a mounting groove 13 that penetrates the bottom of the mounting groove 11. The mounting groove 13 is used to assemble the limiting member 4, providing a stable guiding foundation for the longitudinal sliding of the limiting member 4, ensuring that the limiting member 4 slides smoothly and does not deviate.

[0025] The connecting seat 2 is an inverted T-shape adapted to the assembly groove 11. Both its front and side views show an inverted T-shape. This structural design effectively restricts the radial movement of the connecting seat 2 along the assembly groove 11 when it slides axially with the groove, thus limiting its movement in the front-back and vertical directions and preventing displacement in these directions during testing. The connecting seat 2 is connected to the test cup 3. In this embodiment, the connecting seat 2 and the test cup 3 are integrally formed, resulting in a more stable structure that eliminates the need for additional connection steps and reduces assembly errors. In other embodiments, the connecting seat 2 and the test cup 3 can also be connected via subsequent installation methods, such as threaded connections or snap-fit ​​connections, as long as the stability of the connection is guaranteed. The connecting seat 2 is provided with a locking structure 21, which is a groove. In this embodiment, in order to meet the requirement that there is no need to distinguish the direction when the connecting seat 2 is inserted, the locking structure 21 is set as a cross-shaped groove. The horizontal and vertical sections of the cross-shaped groove can be used as the receiving part 211 and the locking part 212, respectively. The function remains unchanged after switching directions, which greatly reduces the difficulty of assembly and improves assembly efficiency. In other embodiments, the locking structure 21 can also be designed as other symmetrical shapes according to the structure of the limiting member 4, as long as it can achieve the locking function without direction restriction.

[0026] The limiting member 4 is longitudinally slidably assembled in the mounting groove 13 of the base 1. The mounting groove 13 provides precise guidance for the sliding direction of the limiting member 4, ensuring that the limiting member 4 can only move vertically. The limiting member 4 is provided with a locking member 42 and a first guide surface 43 for guidance. There is at least one locking member 42. In this embodiment, there are two locking members 42, symmetrically distributed on the front and rear sides of the upper part of the limiting member 4, corresponding to the locking part 212 of the locking structure 21, which improves the stability of the lock and prevents the test cup 3 from twisting or lateral displacement. In other embodiments, only one locking member 42 may be provided, as long as it can cooperate with the locking part 212 to achieve the locking function. The first guide surface 43 is set in the lateral through direction of the mounting groove 11. In this embodiment, the mounting groove 11 passes through both the left and right ends, so two first guide surfaces 43 are provided to adapt to the connecting seats 2 assembled from the left and right sides respectively. In other embodiments, if the mounting groove 11 only passes through one end, only one first guide surface 43 may be provided. The limiting member 4 has a mating groove 41, which is an inclined strip groove. In this embodiment, there are two mating grooves 41, symmetrically distributed left and right, to fit and cooperate with two operating members 6. In other embodiments, only one mating groove 41 may be provided, corresponding to a single operating member 6. The mating groove 41 has a second guide surface 411 and a third guide surface 412 arranged vertically opposite each other. These two guide surfaces are used to cooperate with the operating member 6 to realize the power transmission between the operating member 6 and the limiting member 4, ensuring smooth linkage in the locking and unlocking process. The lower end of the limiting member 4 has an elastic member receiving groove 44, which is used to receive and position the elastic member 5, preventing the elastic member 5 from shifting during the force process, and ensuring that the elastic member 5 can stably provide upward elastic force to the limiting member 4.

[0027] The elastic element 5 is located between the base 1 and the limiting element 4. In this embodiment, the elastic element 5 is a helical spring, with one end abutting against the top wall of the elastic element receiving groove 44 and the other end abutting against the inner wall of the base 1. This installation method can ensure that the extension and contraction direction of the elastic element 5 is consistent with the sliding direction of the limiting element 4, ensuring accurate transmission of elastic force. In other embodiments, the elastic element 5 can also be other components with elastic reset function, such as elastic rubber blocks, disc springs, etc., as long as they can provide the limiting element 4 with a continuous upward movement trend.

[0028] The operating component 6 is a rod-shaped structure. In this embodiment, there are two operating components 6, symmetrically distributed on both sides of the limiting component 4. This distribution allows the operator to apply force more evenly when unlocking, preventing the limiting component 4 from jamming due to uneven force and improving the operating feel. In other embodiments, only one operating component 6 may be provided, as long as it can drive the limiting component 4 to slide downward to achieve unlocking. The rear side of the operating component 6 is hinged to the base 1, allowing the operating component 6 to rotate around the hinge point. The front side passes through the mating groove 41 and extends into the limiting groove 12. The inner wall of the limiting groove 12 is used to limit the outward rotation angle of the operating component 6, preventing excessive rotation of the operating component 6 from affecting the mating with the limiting component 4.

[0029] The viscosity testing host 7 is fixedly connected to the base 1 of the test cup positioning device via a support mechanism 71. The support mechanism 71 can be connected by bolts, welding, or integral molding to ensure that the relative position between the viscosity testing host 7 and the positioning device is accurately fixed, avoiding relative displacement during the testing process. The portion of the limiting member 4 that extends through the assembly groove 11 to the top of the base 1 is the cup-blocking part. The test component 72 of the viscosity testing host 7 is located directly above the cup-blocking part. The cup-blocking part is used to restrict the test cup 3 from being placed flat in the area of ​​the base 1 below the test component 72. It forces the test cup 3 to be slidably assembled and fixed to the assembly groove 11 via the connecting seat 2 before it can be stably positioned below the test component 72, structurally preventing operational errors caused by testing without fixing it.

[0030] The usage of this embodiment is as follows: In the initial state, the connecting seat 2 is not assembled with the assembly groove 11, and the elastic member 5 is in a naturally extended state, providing an upward elastic force to the limiting member 4, pushing the limiting member 4 to slide upward. At this time, the limiting member 4 pushes the operating member 6 outward through the third guide surface 412 until the operating member 6 abuts against the inner wall of the limiting groove 12. In this state, the limiting member 4 penetrates through the assembly groove 11 to the top of the base 1, and its cup-blocking part prevents the test cup 3 from being placed directly flat under the test assembly 72. At the same time, the front end of the operating member 6 does not extend out of the assembly groove 11 or the extension length is insufficient for the user to turn it inward, avoiding accidental unlocking by the operator and ensuring the safety of the equipment.

[0031] When testing is required, the operator connects the connecting seat 2 to the test cup 3. If it is a separate setup, the two are first fixedly connected, and then the connecting seat 2 is slid laterally into the mounting groove 11 from the left or right side of the base 1. The inverted T-shaped structure of the connecting seat 2 and the mounting groove 11 provides front-to-back and up-and-down positioning, preventing the connecting seat 2 from shifting during sliding. When the connecting seat 2 slides to abut against the first guide surface 43, the connecting seat 2 is pushed further. The first guide surface 43 is subjected to a lateral thrust from the connecting seat 2. This thrust is decomposed into a downward component, driving the limiting member 4 to slide downward against the elastic force of the elastic member 5, compressing the elastic member 5. During the downward sliding of the limiting member 4, the second guide surface 411 of the mating groove 41 pushes the operating member 6 to rotate inward, and the front end of the operating member 6 gradually extends out of the mounting groove 11. When the connecting seat 2 continues to slide until the receiving part 211 of the locking structure 21 is aligned with the limiting member 4 and the locking part 212 is aligned with the locking member 42, the limiting member 4 is reset upward under the elastic force of the elastic member 5. The upper part of the limiting member 4 extends into the receiving part 211 and the locking member 42 is inserted into the locking part 212, thus realizing the reliable locking of the connecting seat 2 and the base 1. At this time, the length of the front end of the operating member 6 extending out of the assembly groove 11 is sufficient for the user to rotate it inward for subsequent unlocking.

[0032] After locking, the test cup 3 is precisely positioned directly below the test component 72. The operator starts the viscosity testing unit 7, and the test component 72 descends and is immersed in the medium to be tested within the test cup 3. Because the connecting seat 2 is securely locked, the test cup 3 will not be affected by external forces, equipment vibration, the liquid being tested, or the rotation of the test component during the testing process, thus preventing displacement or shaking. This ensures that the contact state between the test component 72 and the medium to be tested remains stable, guaranteeing the accuracy of the test data.

[0033] After the test is completed, the operator moves the operating component 6 inward. The operating component 6 rotates inward around the hinge point, and its side contacts the second guide surface 411 of the mating groove 41 and applies a pushing force, causing the limiting component 4 to slide downward against the elastic force of the elastic component 5. The locking component 42 disengages from the locking part 212, and the limiting component 4 exits from the receiving part 211, releasing the lock between the connecting seat 2 and the base 1. The operator can then pull the connecting seat 2 together with the test cup 3 laterally along the assembly groove 11 to complete the disassembly and cleaning of the test cup 3 for the next test.

[0034] It is worth mentioning that, in the initial state, the front end of the operating component 6 does not extend beyond the assembly slot 11 or its extension length is insufficient for the user to move it. Furthermore, it is restricted by the inner wall of the limiting slot 12 and cannot be actively moved. Structurally, this eliminates the possibility of the operator actively driving the operating component 6 to lower the limiting component 4 and then directly placing the test cup 3 for irregular testing, significantly increasing the difficulty of direct testing. However, when the connecting seat 2 is assembled and locked according to the normal procedure, the front end of the operating component 6 will simultaneously extend to a state where it can be easily moved, without affecting the smoothness of subsequent unlocking operations. In addition, the elastic force of the elastic component 5 can be freely selected according to actual usage needs. A larger elastic force not only further enhances the stability of the locking structure but also simultaneously increases the difficulty of forcibly using the equipment through irregular methods such as pressing the limiting component 4. This dual-dimensional approach ensures that the equipment must be operated according to the standard procedure, guaranteeing the reliability of the test data.

[0035] In summary, the test cup positioning device and viscometer containing the device in this embodiment, through an innovatively designed integrated locking structure of "connecting seat + limiting component + elastic component + operating component," specifically overcomes the core technical bottleneck of existing technologies where the test cup lacks effective constraint and is prone to displacement and shaking. In this embodiment, the inverted T-shaped fitting design of the connecting seat and the assembly groove enables assembly without directional restrictions. Combined with the bidirectional through-hole assembly groove, it greatly improves operational convenience. The precise cooperation between the limiting component and the cross-shaped locking structure, combined with the continuous elastic force provided by the elastic component, forms a reliable bidirectional constraint, ensuring that the test cup remains stable throughout the testing process and eliminating measurement errors at the source. The anti-misoperation design of the cup stop forcefully requires the test cup to be assembled and fixed through a dedicated locking structure, further ensuring the accuracy of the test data and the safety of the equipment. At the same time, the overall structural design is scientific and reasonable, the components cooperate smoothly, and the locking and unlocking operations are simple and effortless. It is suitable for viscosity testing scenarios of various fluid media, and the design of each component retains flexible replacement and optimization space, demonstrating significant innovation, practicality, and promotional value.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A test cup positioning device for a viscometer, characterized by, The utility model relates to a test cup base, which comprises a base, a connecting seat, a limiting piece and an elastic piece. The base is provided with a transversely-through assembly slot, which is provided with a limiting slot. The connecting seat is axially slidably connected with the assembly slot and limits the radial movement of the connecting seat along the assembly slot. The connecting seat is connected with a test cup and is provided with a locking structure, which comprises a receiving part and a locking part. The limiting piece is longitudinally slidably connected with the base. The limiting piece is provided with a locking member and a first guide surface for guiding. The limiting piece is provided with a matching slot, which has a second guide surface and a third guide surface arranged oppositely. The elastic piece is arranged between the base and the limiting piece and provides the limiting piece with a tendency to move upward.

2. The test cup positioning device of a viscometer of claim 1, wherein: An operating member is hingedly connected with the base at the back side and extends through the matching slot and into the limiting slot at the front side.

3. The test cup positioning device of a viscometer of claim 2, wherein: In the initial state, the connecting seat is not assembled with the assembly slot, the limiting piece is pushed outward by the elastic force of the elastic piece through the third guide surface to abut against the inner wall of the limiting slot, in this state, the limiting piece extends through the assembly slot above the base, and the front end of the operating member does not extend out of the assembly slot or the extension length is insufficient for the user to operate.

4. The test cup positioning device of a viscometer of claim 3, wherein: When the connecting seat is transversely slidably assembled into the assembly slot to abut against the first guide surface, the first guide surface is pressed to drive the limiting piece to slide downward against the elastic force of the elastic piece, so that the second guide surface pushes the operating member to turn inward.

5. The test cup positioning device of a viscometer of claim 1, wherein: When the receiving part and the locking part are aligned with the limiting piece and the locking member respectively, the limiting piece is reset upward by the elastic force until the limiting piece and the locking member extend into the receiving part and the locking part respectively to achieve locking.

6. The test cup positioning device of a viscometer of claim 1, wherein: In the locked state, the front end of the operating member extends out of the assembly slot with a length sufficient for the user to operate.

7. The test cup positioning device of a viscometer of claim 1, wherein: The connecting seat is not inserted into the assembly slot from four sides, so that the connecting seat is slidably assembled along the assembly slot without distinguishing the direction.

8. The test cup positioning device of a viscometer of claim 1, wherein: The locking structure is configured as a cross-shaped slot, and the transverse segment and the vertical segment of the cross-shaped slot can be used as the receiving part and the locking part.

9. The test cup positioning device of a viscometer of claim 1, wherein: The locking member is provided with two members symmetrically distributed on the upper front and back sides of the limiting piece. The assembly slot extends through the base at the transverse two ends, and the limiting piece is provided with the first guide surface corresponding to the transverse two ends of the assembly slot. The elastic piece is a spiral spring, and the limiting piece is provided with an elastic piece receiving slot at the lower end. The operating member is a rod-shaped structure and is provided with at least one. When the operating member is two, the two operating members are symmetrically distributed on the transverse two sides of the limiting piece, and the matching slot is correspondingly provided with two. The matching slot is an inclined strip-shaped slot, and the second guide surface and the third guide surface extend outward and downward from the center of the limiting piece. The top plate of the base is provided with a mounting slot extending through the bottom of the assembly slot, and the limiting piece is longitudinally slidably connected with the mounting slot.

10. A viscometer comprising a viscosity test host, characterized by: The application further discloses a test cup positioning device, and the viscosity test host is connected with the base of the test cup positioning device through a supporting mechanism, a limiting piece is arranged on the base, and the limiting piece is arranged in a position above the base and is used for limiting the test cup to be placed on the base.

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