Electronic balance sunshade assembly with elastic support damping structure

Abstract

The utility model discloses a kind of electronic balance light shield components with elastic support shock-absorbing structure, belong to electronic balance technical field, including crossbeam, the crossbeam one side is equipped with slot, alloy light shield is inserted in the slot, first light transmission area and second light transmission area are provided on the alloy light shield;The upper and lower of the alloy light shield are provided with press-fit assembly, and the press-fit assembly includes fixed cylinder, and the fixed cylinder is fixedly connected on crossbeam;The electronic balance light shield component with elastic support shock-absorbing structure, the excellent elastic deformation ability and structural stability of micro-elastic support arm integrated by alloy light shield edge, angle can be self-adaptively adjusted with the slight deformation of crossbeam, ensure that alloy light shield always keeps parallel alignment with the optical axis of luminous tube and photosensitive tube, effectively reduce the influence of environmental vibration, temperature change and other interference factors on displacement detection resolution.

Description

Technical Field

[0001] This utility model belongs to the field of electronic balance technology, specifically relating to an electronic balance light shield assembly with an elastic support and shock absorption structure. Background Technology

[0002] As a precision measuring instrument, the weighing accuracy of an electronic balance directly depends on the sensitivity and stability of the displacement detection system. The performance of the light-shielding plate assembly, as the core medium for the "mechanical-optical" conversion in the displacement detection system, directly determines the lower limit of the balance's measurement and the reliability of the data.

[0003] In existing electronic balances, the mainstream method of fixing the light shield is still screw fastening or snap-fit. This rigid connection structure has several obvious defects: First, during the assembly process, it is difficult to control the pre-tightening force of the screws accurately. If it is too large, it will cause irreversible bending deformation of the light shield. If it is too small, it will not be able to guarantee the stability of the fixation, which will cause the relative position of the light shield and the light source and photosensitive element to shift, resulting in deviation of the light signal modulation. Utility Model Content

[0004] The purpose of this utility model is to provide an electronic balance light shield assembly with an elastic support and shock absorption structure to solve the problem that the pre-tightening force of the screws is difficult to control precisely during the assembly process. If it is too large, it will easily cause irreversible bending deformation of the light shield. If it is too small, it will not be able to guarantee the stability of the fixation, which will cause the relative position of the light shield, the light source, and the photosensitive element to shift, resulting in deviation of the light signal modulation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electronic balance light shield assembly with an elastic support and shock absorption structure, comprising a crossbeam, a slot on one side of the crossbeam, an alloy light shield inserted into the slot, and a first light-transmitting area and a second light-transmitting area on the alloy light shield. A pressing assembly is provided above and below the alloy light-shielding sheet. The pressing assembly includes a fixed cylinder, which is fixedly connected to the crossbeam. A spring telescopic rod is rotatably connected inside the fixed cylinder, and the bottom end of the spring telescopic rod is pressed against the surface of the alloy light-shielding sheet.

[0006] In a preferred embodiment, the edge of the alloy light-shielding sheet is integrated with a 0.1 mm thick micro-elastic support arm.

[0007] In a preferred embodiment, a rotating handle is threaded onto the top of the fixed cylinder, the bottom end of the rotating handle extends into the interior of the fixed cylinder, and the extended end is fixedly connected to the top of the spring telescopic rod, and a buffer pressure plate is fixedly connected to the bottom end of the spring telescopic rod.

[0008] In a preferred embodiment, two grooves are provided at the top and bottom of the slot, and permanent magnets are fixed inside the two grooves. The two permanent magnets attract each other on opposite sides, and an alloy light-shielding sheet is disposed between the attraction surfaces of the two permanent magnets.

[0009] In a preferred embodiment, a buffer pad is fixedly connected to the inner side of the slot, and the slot is rectangular.

[0010] In a preferred embodiment, a fixing groove is provided on the side of the crossbeam away from the slot, and the inside of the fixing groove is inserted into one end of the column of the electronic balance. A fixing screw is provided at the top of the crossbeam, and the bottom end of the fixing screw is pressed against the surface of the column.

[0011] In one preferred embodiment, the fixed cylinder has an opening for one end of the spring telescopic rod to extend out.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This electronic balance light shield assembly with elastic support and shock absorption structure combines excellent elastic deformation capability and structural stability through the micro-elastic support arm integrated at the edge of the alloy light shield. It can adaptively adjust the angle according to the slight deformation of the crossbeam, ensuring that the alloy light shield always remains parallel and aligned with the optical axis of the light-emitting tube and the photosensitive tube, effectively reducing the impact of environmental vibration, temperature change and other interference factors on displacement detection resolution.

[0013] This electronic balance light shield assembly with elastic support and shock absorption structure uses the magnetic attraction force of permanent magnets to initially fix the alloy light shield without the need for additional screws. Combined with the elastic pressing structure of the spring telescopic rod and the buffer pressure plate, the fixing strength can be further enhanced. At the same time, the elastic force of the spring is used to achieve automatic reset of the alloy light shield after deformation. The buffer pad inside the slot can buffer the alloy light shield.

[0014] The electronic balance light shield assembly with elastic support and shock absorption structure has a first light-transmitting area and a second light-transmitting area on the alloy light shield to achieve stepped modulation of the light signal. Compared with the traditional single light-transmitting / light-shielding structure, it can provide richer light signal change characteristics, which facilitates the position detector to accurately analyze the displacement signal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the principle of an electronic balance structure in the prior art; Figure 2 This is a schematic diagram of the structure of the electronic balance light shield assembly with elastic support and shock absorption structure of this utility model; Figure 3 This is a schematic diagram of the rotating handle of this utility model; Figure 4This is a schematic diagram of the groove and permanent magnet of this utility model.

[0016] In the diagram: 1. Crossbeam; 2. Alloy light-shielding sheet; 3. First light-transmitting area; 4. Second light-transmitting area; 5. Fixing cylinder; 6. Rotating handle; 7. Slot; 8. Spring telescopic rod; 9. Buffer pressure plate; 10. Buffer pad; 11. Groove; 12. Permanent magnet. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0019] Please see Figure 1 and Figure 2 This utility model provides an electronic balance light shield assembly with an elastic support and shock absorption structure, including a crossbeam 1, a slot 7 on one side of the crossbeam 1, an alloy light shield 2 inserted into the slot 7, the edge of the alloy light shield 2 integrating a 0.1mm thick micro-elastic support arm, the alloy light shield 2 being made of beryllium copper alloy, a fixing groove on the side of the crossbeam 1 away from the slot 7, one end of the column of the electronic balance being inserted into the fixing groove, a fixing screw being provided at the top of the crossbeam 1, the bottom end of the fixing screw being pressed against the surface of the column.

[0020] In this embodiment, a weighing pan is connected to the top of the column, a permanent magnet is provided on the outside of the column, and a moving coil is provided on the permanent magnet. The moving coil is electrically connected to the drive circuit of the electronic balance.

[0021] Please see Figure 1 and Figure 2 The alloy light-shielding plate 2 is positioned between the light-emitting tube and the photosensitive tube. The photosensitive tube is signal-connected to the position detector. The light-emitting tube continuously emits light signals (such as infrared light) as the light source for displacement detection. When there is a heavy object on the weighing pan, the column descends, and the alloy light-shielding plate 2 moves synchronously with the column displacement. By blocking / allowing the light from the light-emitting tube, the modulation of "mechanical displacement to light signal change" is achieved (such as "light-shielding tube is cut off when blocked, light-allowing tube is turned on when transmitted", or continuous change in light intensity corresponds to continuous change in displacement). The photosensitive tube receives the light signal modulated by the light-shielding plate and converts it into an electrical signal (current / voltage change), realizing the conversion of "light signal to electrical signal". The displacement detector amplifies, filters, and performs AD conversion on the electrical signal of the photosensitive tube, outputting a digital signal proportional to the displacement, completing the analysis of "electrical signal to digital displacement" and providing feedback for closed-loop control. Since the above descriptions are all existing publicly available technologies, they will not be elaborated further.

[0022] In this embodiment, the micro-elastic support arm allows the alloy light-shielding plate 2 to adaptively adjust its angle according to the slight deformation of the crossbeam, always maintaining parallel alignment with the light source and reducing the impact of environmental interference on resolution.

[0023] Please see Figure 2 The alloy light-shielding sheet 2 is provided with a first light-transmitting area 3 and a second light-transmitting area 4. When the alloy light-shielding sheet 2 is moved, light can pass through the first light-transmitting area 3 or the second light-transmitting area 4, thereby changing the light penetration intensity.

[0024] In this embodiment, the first light-transmitting area 3 is a hollowed-out elongated hole with a width of 5mm, and the second light-transmitting area 4 is a frosted area with a width of 5mm. The haze of the frosted surface is 80%, which can reduce the intensity of transmitted light by 50%.

[0025] Please see Figure 2 and Figure 3 A pressing assembly is provided above and below the alloy light-shielding sheet 2. The pressing assembly includes a fixed cylinder 5, which is fixedly connected to the crossbeam 1. A spring telescopic rod 8 is rotatably connected inside the fixed cylinder 5, and the bottom end of the spring telescopic rod 8 is pressed against the surface of the alloy light-shielding sheet 2.

[0026] Please see Figure 2 and Figure 4 The top of the fixed cylinder 5 is threaded with a rotating handle 6. The bottom end of the rotating handle 6 extends into the fixed cylinder 5 and is fixedly connected to the top of the spring telescopic rod 8. The bottom end of the spring telescopic rod 8 is fixedly connected to a buffer pressure plate 9. The top and bottom of the slot 7 are provided with two grooves 11. A permanent magnet 12 is fixed inside each of the two grooves 11. The two permanent magnets 12 attract each other on opposite sides, and the alloy light shield 2 is set between the attraction surfaces of the two permanent magnets 12.

[0027] In this embodiment, after the alloy light-shielding sheet 2 and the slot 7 are inserted, one end of the alloy light-shielding sheet 2 will be inserted between the two permanent magnets 12. The two permanent magnets 12 will generate an attraction force relative to each other, which can clamp and fix the alloy light-shielding sheet 2 to prevent movement. No additional fixing screws are required for installation, which avoids deformation of the alloy light-shielding sheet 2. At the same time, by rotating the handle 6, one end of the spring telescopic rod 8 can be extended out of the fixing cylinder 5, thereby pressing it against the surface of the alloy light-shielding sheet 2 to enhance the fixing strength. At the same time, when the alloy light-shielding sheet 2 is deformed, the deformed part will be reset by the elastic force.

[0028] Please see Figure 2 and Figure 3 A buffer pad 10 is fixedly connected to the inside of the slot 7. The slot 7 is rectangular. The fixed cylinder 5 has an opening for one end of the spring telescopic rod 8 to extend out.

[0029] Working principle: First, insert the alloy light-shielding sheet 2 into the slot 7 of the crossbeam 1, with its two ends entering between the oppositely arranged permanent magnets 12, and complete the initial fixation through magnetic field adsorption force; Rotate the handle 6 to drive the spring telescopic rod 8 to extend, so that the buffer plate 9 presses against the surface of the alloy light shield 2 to achieve secondary stabilization and fixation; then insert the fixing groove of the crossbeam 1 into the column and tighten the fixing screws to fix the crossbeam 1 to the column.

[0030] During weighing, when a heavy object is placed on the weighing pan, the column descends under the action of gravity, causing the crossbeam 1 and the alloy light-shielding plate 2 to move synchronously. The light-emitting tube continuously emits infrared light signals. When the alloy light-shielding plate 2 moves to the first light-transmitting area 3 and coincides with the optical path, the light passes through completely and is received by the phototube, which then conducts and outputs a high-level signal. When the alloy light-shielding plate 2 moves to the second light-transmitting area 4 and coincides with the optical path, the light is attenuated by the frosted surface and then received by the phototube, which outputs a medium-level signal. When the non-light-transmitting area of ​​the alloy light-shielding plate 2 coincides with the optical path, the light is blocked, and the phototube cuts off and outputs a low-level signal.

[0031] The phototube converts the light signal into a corresponding electrical signal and transmits it to the position detector. The position detector amplifies, filters, and performs AD conversion on the electrical signal, outputting a digital signal proportional to the displacement. This digital signal is transmitted to the main control unit of the electronic balance. The main control unit controls the drive circuit to supply current to the moving coil, causing the moving coil to generate electromagnetic force in the magnetic field of the permanent magnet, thus balancing the weight of the object. At the same time, the mass of the object is calculated based on the digital signal and displayed.

[0032] Throughout the process, if the crossbeam 1 undergoes slight deformation due to environmental vibration or stress, the micro-elastic support arm at the edge of the alloy light shield 2 will undergo adaptive elastic deformation to adjust the angle of the alloy light shield 2, ensuring that it remains parallel and aligned with the light-emitting tube and the photosensitive tube. The buffer pad 10 and the buffer pressure plate 9 absorb the vibration impact, reduce the vibration displacement of the alloy light shield 2, and further improve the stability of the optical signal modulation.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronic balance light-shielding plate assembly with an elastic support and shock-absorbing structure, comprising a crossbeam (1), characterized in that: A slot (7) is provided on one side of the crossbeam (1), and an alloy light-shielding sheet (2) is inserted into the slot (7). The alloy light-shielding sheet (2) is provided with a first light-transmitting area (3) and a second light-transmitting area (4). The alloy light-shielding sheet (2) is provided with pressing components above and below it. The pressing components include a fixed cylinder (5), which is fixedly connected to the crossbeam (1). A spring telescopic rod (8) is rotatably connected inside the fixed cylinder (5), and the bottom end of the spring telescopic rod (8) is pressed against the surface of the alloy light-shielding sheet (2).

2. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: The edge of the alloy light-shielding sheet (2) integrates a 0.1mm thick micro-elastic support arm.

3. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: The top of the fixed cylinder (5) is threaded with a rotating handle (6), the bottom end of the rotating handle (6) extends into the inside of the fixed cylinder (5), and the extended end is fixedly connected to the top of the spring telescopic rod (8). The bottom end of the spring telescopic rod (8) is fixedly connected to a buffer pressure plate (9).

4. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: The slot (7) has two grooves (11) at the top and bottom. A permanent magnet (12) is fixed inside each groove (11). The two permanent magnets (12) attract each other on opposite sides, and the alloy light shield (2) is placed between the attraction surfaces of the two permanent magnets (12).

5. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: A buffer pad (10) is fixedly connected to the inside of the slot (7), and the slot (7) is rectangular.

6. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: A fixing groove is provided on the side of the crossbeam (1) away from the slot (7). The inside of the fixing groove is inserted into one end of the column of the electronic balance. A fixing screw is provided at the top of the crossbeam (1), and the bottom end of the fixing screw is pressed against the surface of the column.

7. The electronic balance light-shielding sheet assembly with elastic support and shock absorption structure according to claim 1, characterized in that: The fixed cylinder (5) has an opening for one end of the spring telescopic rod (8) to extend out.

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