Weighing assembly, weighing mechanism and centrifugal equipment

Abstract

The utility model belongs to the technical field of medical instruments, and provides a weighing assembly, a weighing mechanism and centrifugal equipment. The weighing device comprises a weighing support, a weighing sensor component and an elastic supporting piece. The weighing sensor component is provided with a connecting end and a weighing end which are oppositely arranged, and the connecting end is arranged on the weighing bracket; the weighing end extends towards one side of the weighing support and extends out of the weighing support so as to bear a tray base plate of a tray assembly, and the tray base plate is used for bearing an object to be weighed; the elastic supporting piece is located between the connecting end and the weighing support so as to elastically support the connecting end. The elastic supporting piece is configured to be compressed to deform to form buffering when the external force from the connecting end is larger than the pre-tightening force of the elastic supporting piece, and the elastic supporting piece recovers deformation along with disappearance of the external force. According to the utility model, the purpose of protecting the weighing sensor can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a weighing component, a weighing mechanism and a centrifugal device. Background Art

[0002] Centrifugal equipment is widely used in the field of in vitro diagnostics. For example, the centrifugal equipment can be used in conjunction with a single in vitro diagnostic instrument, or it can be used in conjunction with an assembly line consisting of at least two in vitro diagnostic instruments. In the related art, the centrifugal equipment has a centrifugal adapter, which is used to carry the sample to be centrifuged. During centrifugation, the centrifugal adapter carrying the sample to be centrifuged is placed in the centrifuge of the centrifugal equipment for centrifugation. In order to ensure the centrifugal effect, there are high requirements for the consistency of the weight of the multiple centrifugal adapters carrying the samples to be centrifuged placed in the centrifuge. Therefore, in the related art, the centrifugal equipment is provided with a weighing mechanism for weighing the centrifugal adapter carrying the sample to be centrifuged, and the weighing mechanism uses a weighing sensor. The weighing sensor is a device that converts a mass signal into a measurable electrical signal output. Based on this working principle, the weighing sensor is very sensitive to external force and can achieve relatively fine weighing. It is a precision instrument.

[0003] In the related art, weighing sensors are installed in a cantilever manner. The structure of small-capacity, high-precision weighing sensors is relatively thin. During the debugging process of the robot arm that grabs the object to be weighed, or during the use of the equipment that cooperates with the weighing sensor, it is easy to cause irreversible damage to the weighing sensor.

[0004] Therefore, a new solution is needed to solve the above technical problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a weighing assembly, a weighing mechanism and a centrifugal device, which are used to solve the problem of damage caused by unprotected weighing sensors in the prior art.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a weighing assembly, which is specifically configured as follows: it includes a weighing bracket, a weighing sensor component and an elastic support member; the weighing sensor component has a connecting end and a weighing end that are relatively arranged, the connecting end is arranged on the weighing bracket, the weighing end extends toward one side of the weighing bracket and extends out of the weighing bracket to support the tray pad of the tray assembly, and the tray pad is used to support the object to be weighed; the elastic support member is located between the connecting end and the weighing bracket to form an elastic support for the connecting end; the elastic support member is configured to be compressed and deformed by an external force from the connecting end that is greater than its own pre-tightening force to form a buffer, and to restore the deformation when the external force disappears.

[0007] Optionally, the connecting end includes a movable fixing frame and a fixed end of a weighing sensor fixed on the movable fixing frame, the elastic support member is arranged between the movable fixing frame and the weighing bracket, and the movable fixing frame can move along the deformation direction of the elastic support member.

[0008] Optionally, a mounting groove is provided on the side wall of the weighing bracket, and the weighing assembly also includes a guide shaft connected between a first side wall and a second side wall oppositely arranged on the mounting groove, the movable fixed frame is slidably connected to the guide shaft, and the two ends of the elastic support member are respectively abutted against the first side wall and the movable fixed frame.

[0009] Optionally, the weighing assembly further includes a bearing connected to the movable fixed frame, and the guide shaft is in sliding engagement with the bearing; and / or, the weighing assembly further includes a vibration damping member connected to the movable fixed frame, the vibration damping member being located between the movable fixed frame and the second side wall to dampen vibration of the movable fixed frame.

[0010] Optionally, the elastic support member is configured as a spring.

[0011] Optionally, at least two weighing sensor components are provided and are arranged side by side along the length direction of the weighing bracket, and the extending direction of the weighing end of each weighing sensor component is the same.

[0012] The utility model also provides a weighing mechanism, comprising a tray assembly and any one of the above-mentioned weighing assemblies; the tray assembly comprises a tray pad, a support frame and a tray connected to the support frame, the tray is provided with a accommodating cavity, and the bottom of the accommodating cavity is provided with an accommodating through hole; when the tray assembly and the weighing assembly are arranged in alignment, the weighing end is located below the accommodating cavity and corresponds to the position of the accommodating through hole, the tray pad is arranged in the accommodating through hole and is supported by the weighing end.

[0013] Optionally, the tray is provided with at least two accommodating cavities; the tray pad is correspondingly provided in each accommodating cavity, and the tray is integrally formed.

[0014] Optionally, the aperture of the accommodating through hole is smaller than the size of the bottom of the object to be weighed. When the pallet pad does not carry the object to be weighed, the top surface of the pallet pad is higher than the bottom surface of the accommodating cavity, and the maximum height difference between the two is less than the maximum compression stroke of the elastic support member.

[0015] The utility model further provides a centrifugal device, comprising a centrifugal platform and any one of the above-mentioned weighing mechanisms, wherein the weighing mechanism is fixedly arranged on the centrifugal platform.

[0016] As described above, the weighing assembly, weighing mechanism and centrifugal device of the present invention have the following beneficial effects:

[0017] By arranging an elastic support member between the connecting end of the weighing sensor component and the weighing bracket, when the object to be weighed is placed on the tray pad supported by the weighing end of the weighing sensor component extending out of the weighing bracket, the connecting end will apply an external force to the elastic support member. When the external force is greater than the pre-tightening force of the elastic support member, the elastic support member will be compressed and deformed to form a buffer for the weighing sensor component, thereby achieving the purpose of protecting the weighing sensor component; after the above-mentioned external force disappears, the elastic support member will restore its deformation to form an elastic support for the connecting end of the weighing sensor component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of a weighing assembly according to an embodiment of the present utility model;

[0019] Figure 2 Display as Figure 1 Schematic diagram of the structure of the local A;

[0020] Figure 3 Shown is a schematic structural diagram of a weighing mechanism according to an embodiment of the present utility model;

[0021] Figure 4 Shown is a schematic structural diagram of a tray assembly according to an embodiment of the present utility model;

[0022] Figure 5 Shown is a schematic cross-sectional structure diagram of a weighing mechanism according to an embodiment of the present utility model;

[0023] Figure 6 Shown is a schematic cross-sectional view of a weighing mechanism carrying a centrifugal adapter according to an embodiment of the present invention;

[0024] Figure 7 Shown is a schematic structural diagram of a tray according to an embodiment of the present utility model;

[0025] Figure 8 Shown is a structural schematic diagram of a centrifugal adapter according to an embodiment of the present utility model.

[0026] Description of Reference Numerals

[0027] 1-weighing bracket; 11-mounting slot; 111-first side wall; 112-second side wall;

[0028] 2-weighing sensor component; 21-movable fixing frame; 22-weighing sensor;

[0029] 3- elastic support member;

[0030] 4-guide shaft;

[0031] 5-vibration damping parts;

[0032] 6-support frame;

[0033] 7-tray; 71-accommodating cavity; 711-first inner wall; 712-second inner wall; 72-accommodating through hole;

[0034] 8-Pallet pad;

[0035] 9-centrifugal adapter; 91-first outer wall; 92-second outer wall;

[0036] 10-Trim seat. DETAILED DESCRIPTION

[0037] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0038] In some embodiments, the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention rather than the number, shape and size of the components when actually implemented. When actually implemented, the form, quantity and ratio of each component can be changed at will, and the component layout form may also be more complex. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions that the present invention can implement. Therefore, they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the present invention when there is no substantial change in the technical content.

[0039] like Figure 1 and Figure 2As shown, some embodiments of the present application provide a weighing assembly, including a weighing bracket 1, a weighing sensor component 2 and an elastic support member 3. The weighing sensor component 2 is provided with a connecting end and a weighing end, which are arranged opposite to each other. The connecting end is mounted on the weighing bracket 1; the weighing end extends toward one side of the weighing bracket 1 and extends out of the weighing bracket 1 to support the pallet pad of the pallet assembly. The pallet pad is used to support the object to be weighed, and then weigh the object to be weighed. The elastic support member 3 is located between the connecting end of the weighing sensor component 2 and the weighing bracket 1, and is used to form an elastic support for the connecting end.

[0040] When an object to be weighed is placed on the pallet pad, the object applies pressure to the pallet pad. This pressure is transmitted through the pallet pad to the weighing end, and then from the weighing end to the connecting end, causing the connecting end to apply an external force to the elastic support member 3. When the external force applied by the connecting end to the elastic support member 3 is greater than the preload force of the elastic support member 3 itself, the elastic support member 3 is compressed and deformed, acting as a buffer for the load cell component 2, thereby protecting the load cell component 2.

[0041] When the object to be weighed is weighed, the object to be weighed is removed from the tray pad, and then the external force applied by the connecting end to the elastic support member 3 disappears, and the elastic support member 3 recovers its deformation.

[0042] In some embodiments, the object to be weighed includes, but is not limited to, a centrifuge adapter carrying a sample to be tested.

[0043] In some embodiments, at least one weighing sensor component 2 is provided, and the specific number is set according to actual needs, and can be 1, 2, 3, etc. In addition, the number of elastic support members 3 is set in a one-to-one correspondence with the number of weighing sensor components 2.

[0044] In some embodiments, at least two load cell components 2 are provided, with the specific number being set based on actual needs, so as to simultaneously weigh at least two objects. The at least two load cell components 2 are arranged side by side along the length of the weighing bracket 1, and the weighing ends of the load cell components 2 extend in the same direction to facilitate cooperation with the tray assembly.

[0045] In other embodiments, at least two load cell components 2 are provided, and the extending directions of the weighing ends of the load cell components 2 may be different or partially the same. When the extending directions of the weighing ends of the load cell components 2 are partially the same, the extending directions of the weighing ends of two adjacent load cell components 2 may be opposite, or half or any proportion of the weighing ends of the load cell components 2 may be the same.

[0046] In some embodiments, the connection end includes a movable fixing frame 21 and a fixed end of a weighing sensor 22, wherein the fixed end of the weighing sensor 22 is fixedly connected to the movable fixing frame 21 by means of screw connection or the like. The elastic support member 3 is disposed between the movable fixing frame 21 and the weighing bracket 1. The movable fixing frame 21 can move along the deformation direction of the elastic support member 3, and the weighing sensor 22 moves synchronously with the movable fixing frame 21 to protect the weighing sensor 22.

[0047] In some embodiments, the weighing end of the load cell component 2 is the weighing end of the load cell 22. When an object to be weighed is carried on the pallet backing plate, the object to be weighed applies pressure to the pallet backing plate. This pressure is transmitted through the pallet backing plate to the weighing end of the load cell 22, and then from the weighing end of the load cell 22 to the fixed end of the load cell 22, and finally to the movable fixing frame 21, so that the movable fixing frame 21 applies an external force to the elastic support member 3.

[0048] In some embodiments, a mounting slot 11 is provided on the side wall of the weighing bracket 1, and the mounting slot 11 has a first side wall 111 and a second side wall 112 disposed opposite each other. A guide shaft 4 is mounted within the mounting slot 11, and is located between the first side wall 111 and the second side wall 112 of the mounting slot 11. A movable fixing frame 21 is slidably connected to the guide shaft 4, enabling the movable fixing frame 21 to slide between the first side wall 111 and the second side wall 112. The ends of the elastic support member 3 respectively abut against the first side wall 111 of the mounting slot 11 and the movable fixing frame 21 to provide elastic support for the movable fixing frame 21.

[0049] In some embodiments, the cross section of the mounting groove 11 in the length direction may be configured as a U-shaped structure, and the first side wall 111 and the second side wall 112 are two oppositely disposed surfaces of the U-shaped structure.

[0050] In some embodiments, a bearing is further mounted on the movable fixing frame 21 , and the bearing is slidably engaged with the guide shaft 4 , so that the movable fixing frame 21 can slide more smoothly along the axial direction of the guide shaft 4 .

[0051] In some embodiments, the elastic support member 3 can be configured as an elastic structure such as a spring. When the elastic support member 3 is configured as a spring, the spring is sleeved on the guide shaft 4 to elastically support the movable fixing frame 21.

[0052] In other embodiments, the elastic support member 3 may also be configured as an elastic sleeve, which is provided on the guide shaft 4. The elastic sleeve may be made of an elastic material such as plastic.

[0053] In some embodiments, elastic supports 3 , guide shafts 4 and bearings are provided on both sides of the movable fixing frame 21 , so that the movable fixing frame 21 can run smoothly during the movement along the axial direction of the guide shaft 4 .

[0054] In some embodiments, since the weighing assembly of the present application needs to be installed on other equipment for use, the equipment inevitably generates vibrations during operation. To prevent this vibration from affecting the reading of the load cell 22, a vibration damper 5 is installed on the movable bracket 21. The vibration damper 5 is located between the movable bracket 21 and the second side wall 112 of the mounting slot 11. When the equipment vibrates during operation, the vibration damper 5 acts to reduce vibrations on the movable bracket 21, and further reduces vibrations on the load cell 22, thereby improving the accuracy of the readings of the load cell 22.

[0055] In some embodiments, the vibration damping member 5 may be made of a plastic material with vibration absorption function, such as rubber, to achieve a vibration reduction effect.

[0056] In some embodiments, the vibration damper 5 partially protrudes from the movable fixing frame 21 , the portion of the vibration damper 5 protruding from the movable fixing frame 21 abuts against the second side wall 112 of the installation slot 11 , and vibration dampers 5 are installed on both sides of the movable fixing frame 21 .

[0057] In some embodiments, the fixed end of the weighing sensor 22 is mounted on the side of the movable fixing frame 21 away from the vibration damping member 5. The weighing sensor 22 is preferably mounted in the middle of the movable fixing frame 21 to improve the accuracy of the weighing sensor 22 reading.

[0058] like Figures 3 to 5 As shown, some embodiments of the present application further provide a weighing mechanism comprising the aforementioned weighing assembly and a tray assembly. The tray assembly comprises a support frame 6, a tray 7, and a tray pad 8, wherein the tray 7 is mounted on the support frame 6. The tray 7 is provided with a receiving cavity 71, the bottom of which is provided with a receiving through hole 72, which extends through the bottom of the tray 7.

[0059] When the tray assembly and the weighing assembly are positioned relative to each other, the weighing end of the load cell 22 is located below the accommodating cavity 71 and is positioned corresponding to the accommodating through-hole 72, so that the tray pad 8 is supported by the weighing end of the load cell 22 in the accommodating through-hole 72. When the elastic support member 3 is deformed by an external force, the tray pad 8 moves along the centerline of the accommodating through-hole 72 to protect the load cell 22 from damage.

[0060] In some embodiments, the diameter of the receiving through-hole 72 is smaller than the bottom size of the object to be weighed. When the tray pad 8 is not loaded with the object to be weighed, the top surface of the tray pad 8 is higher than the bottom surface of the accommodating cavity 71. The maximum height difference between the two is less than the maximum compression stroke of the elastic support member 3, thereby preventing the weighing object from damaging the load cell 22. The maximum height difference is the maximum distance that the top surface of the tray pad 8 protrudes from the bottom surface of the accommodating cavity 71.

[0061] When the object to be weighed is carried on the pallet pad 8, after force transmission, when the external force of the movable fixing frame 21 on the elastic support member 3 is less than the pre-tightening force of the elastic support member 3, the pallet pad 8 moves down along the center line of the accommodating through hole 72, and acts as a buffer for the weighing sensor 22. At this time, there is still a gap between the top surface of the pallet pad 8 and the bottom surface of the accommodating cavity 71; when the external force of the movable fixing frame 21 on the elastic support member 3 is greater than the pre-tightening force of the elastic support member 3, the pallet pad 8 moves down along the center line of the accommodating through hole 72 until the top surface of the pallet pad 8 is flush with the bottom surface of the accommodating cavity 71. At this time, the bottom surface of the accommodating cavity 71 carries the object to be weighed to protect the weighing sensor 22 from being damaged.

[0062] like Figure 6 As shown, in some embodiments, when the object to be weighed is a centrifugal adapter 9 carrying a sample to be tested, the centrifugal adapter 9 is placed on the tray pad 8. After force transmission, when the external force exerted by the movable fixing frame 21 on the elastic support member 3 is greater than the preload force of the elastic support member 3, the tray pad 8 moves down along the center line of the receiving through hole 72 until the top surface of the tray pad 8 is flush with the bottom surface of the accommodating cavity 71. At this point, the bottom surface of the centrifugal adapter 9 abuts the bottom surface of the accommodating cavity 71, and the centrifugal adapter 9 is supported by the tray 7.

[0063] like Figure 7 As shown, in some embodiments, the tray 7 is provided with at least two accommodating cavities 71. The number of accommodating cavities 71 provided on the tray 7 is adjusted according to actual needs, and the number of accommodating cavities 71 can be 2, 3, 4, etc. This arrangement ensures the relative positions of two adjacent accommodating cavities 71, and only requires a single adjustment to ensure the relative positions of all accommodating cavities 71, which helps reduce the debugging workload. Furthermore, the tray 7 is integrally formed, which helps reduce costs. In this embodiment, the tray 7 is provided with five accommodating cavities 71.

[0064] Each accommodating cavity 71 is correspondingly provided with a tray pad 8, and the tray pad 8 is supported by the weighing end of the weighing sensor 22, that is, each accommodating cavity 71 can complete the weighing of the object to be weighed, so as to improve work efficiency.

[0065] In some embodiments, the positioning of the tray 7 can be achieved by, but not limited to, positioning pins installed on the support frame 6 .

[0066] like Figure 7 and Figure 8 As shown, in some embodiments, when the object to be weighed is a centrifugal adapter 9 carrying a sample to be tested, the first outer wall 91 and the second outer wall 92 connected to the centrifugal adapter 9 are matched with the first inner wall 711 and the second inner wall 712 connected to the accommodating cavity 71 of the tray 7 to achieve the positioning of the centrifugal adapter 9.

[0067] In some embodiments, a balancing seat 9 is also installed on the support frame 6. The balancing seat 9 is located on one side of the tray 7 and is used to store balancing test tubes. When the sample test tubes to be tested cannot fully load the adapter, the balancing operation of the adapter is completed by placing the balancing test tubes into the adapter.

[0068] Some embodiments of the present application further provide a centrifugal device comprising a centrifugal platform and the aforementioned weighing mechanism, wherein the weighing mechanism is fixedly mounted on the centrifugal platform by screws or the like. The object to be weighed is weighed by the weighing mechanism to achieve a balancing operation, and then centrifuged on the centrifugal platform.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may 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 one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A weighing assembly, characterized in that: It includes a weighing bracket, a weighing sensor component and an elastic support member; The weighing sensor component has a connecting end and a weighing end that are oppositely arranged, the connecting end is provided on the weighing bracket, the weighing end extends toward one side of the weighing bracket and extends out of the weighing bracket to support a tray pad of the tray assembly, and the tray pad is used to support an object to be weighed; The elastic support member is located between the connecting end and the weighing bracket to form an elastic support for the connecting end; the elastic support member is configured to be compressed and deformed to form a buffer when the external force from the connecting end is greater than its own pre-tightening force, and to restore the deformation when the external force disappears.

2. The weighing assembly according to claim 1, characterized in that: The connecting end includes a movable fixing frame and a fixed end of a weighing sensor fixed on the movable fixing frame. The elastic support member is arranged between the movable fixing frame and the weighing bracket. The movable fixing frame can move along the deformation direction of the elastic support member.

3. The weighing assembly according to claim 2, characterized in that: A mounting groove is provided on the side wall of the weighing bracket, and the weighing assembly also includes a guide shaft connected between the first side wall and the second side wall oppositely arranged on the mounting groove. The movable fixed frame is slidably connected to the guide shaft, and the two ends of the elastic support member are respectively abutted against the first side wall and the movable fixed frame.

4. The weighing assembly according to claim 3, characterized in that: The weighing assembly further includes a bearing connected to the movable fixed frame, and the guide shaft is in sliding engagement with the bearing; and / or the weighing assembly further includes a vibration damping member connected to the movable fixed frame, the vibration damping member being located between the movable fixed frame and the second side wall to reduce vibration of the movable fixed frame.

5. The weighing assembly according to any one of claims 1 to 4, characterized in that: The elastic supporting member is configured as a spring.

6. The weighing assembly according to any one of claims 1 to 4, characterized in that: At least two weighing sensor components are provided and arranged side by side along the length direction of the weighing bracket, and the weighing ends of the weighing sensor components extend in the same direction.

7. A weighing mechanism, characterized in that: include: A tray assembly and a weighing assembly according to any one of claims 1 to 6; The tray assembly includes a tray pad, a support frame, and a tray connected to the support frame. The tray is provided with a receiving cavity, and a receiving through hole is provided at the bottom of the receiving cavity. When the tray assembly and the weighing assembly are aligned, the weighing end is located below the accommodating cavity and corresponds to the position of the accommodating through hole, and the tray pad is arranged in the accommodating through hole and supported by the weighing end.

8. The weighing mechanism according to claim 7, characterized in that: The tray is provided with at least two accommodating cavities; the tray pad is correspondingly provided in each accommodating cavity, and the tray is integrally formed.

9. The weighing mechanism according to claim 7 or 8, characterized in that: The aperture of the accommodating through hole is smaller than the size of the bottom of the object to be weighed. When the tray pad does not carry the object to be weighed, the top surface of the tray pad is higher than the bottom surface of the accommodating cavity, and the maximum height difference between the two is less than the maximum compression stroke of the elastic support member.

10. A centrifugal device, characterized in that: It comprises a centrifugal platform and a weighing mechanism as described in any one of claims 7 to 9, wherein the weighing mechanism is fixedly arranged on the centrifugal platform.

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