High-precision coulomb force device and use method

Abstract

The invention provides a high-precision coulomb force device and a use method, and relates to the field of fabricated wallboards. A high-precision coulomb force device comprises an electronic balance, a horizontal adjusting device is arranged at the bottom of the electronic balance, a storage device is arranged on one side of the electronic balance, a fine adjusting device is arranged on the storage device, a sealing device is arranged on the electronic balance, a testing device is arranged on the electronic balance, and the testing device comprises a first insulating base and a second insulating rod. A first insulating rod is fixedly mounted on the first insulating base; during test, the suspension sheet is suspended on the suspension table, the rotating handle is rotated, and the rotating handle is engaged with the connecting plate through the threaded rod during rotation, so that the second metal wafer can be stably and gradually driven to move, and students can observe that the second metal wafer gradually gets close to the first metal wafer while rotating the rotating handle during test. Through the change of numerical readings on the electronic balance, the distance and the coulomb force can be more conveniently explored.

Description

Technical Field

[0001] The invention relates to the field of demonstration teaching aids, in particular to a high-precision Coulomb force device and a use method thereof. Background Art

[0002] The announcement number is CN215679796U. A demonstration teaching aid for quantitatively exploring Coulomb's law using an electronic analytical balance comprises an electronic analytical balance, a glass frame, a top cover, an upper insulating rod, a lower insulating rod, a first metal disc, and a second metal disc. The top of the electronic analytical balance is made of a plexiglass plate, and the glass frame is a hollow frame structure with openings at the top and the bottom. The interaction force between two stationary charged bodies that can be regarded as point charges is the principle of "Coulomb force", and then the first metal disc and the second metal disc are charged by an electronic generator. The height of the second metal disc is adjusted by the upper insulating rod to change the distance between the second metal disc and the first metal disc, and then the relationship between the Coulomb force and the distance between the charged bodies is measured. The charge of the second metal disc is proportionally changed to measure the relationship between the Coulomb force and the charge of the charged body.

[0003] During the test, the above device needs to manually adjust the position of the upper insulating rod so that the upper disc is close to the lower disc so that a reading appears on the balance. However, the manual adjustment of the displacement of the insulating rod is not easy to control, which can easily lead to excessive offset so that the two metal sheets touch each other, and the relationship between the distance and the Coulomb force cannot be intuitively reflected. In addition, the above device cannot adjust the horizontality. If the test platform is not flat, it will affect the test effect. Therefore, a high-precision Coulomb force device and a method of use are needed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a high-precision Coulomb force device and a method of use, which solves the problems that common experimental devices cannot smoothly adjust the position of the metal disc, cannot adapt to different environments, and cannot adjust the levelness.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-precision Coulomb force device, comprising an electronic balance, a level adjustment device is provided at the bottom of the electronic balance, a storage device is provided on one side of the electronic balance, a fine-tuning device is provided on the storage device, a sealing device is provided on the electronic balance, and a test device is provided on the electronic balance;

[0008] Preferably, the test device includes a first insulating base and a second insulating rod, the first insulating base is fixedly mounted with the first insulating rod, the first insulating rod is fixedly mounted with a first metal disc at one end away from the first insulating base, the second insulating rod is fixedly mounted with a second metal disc at one end, the second insulating rod is fixedly mounted with a suspension sheet at one end away from the second metal disc, and the second insulating rod is provided with scale lines.

[0009] Preferably, the storage device includes a storage cabinet, which is installed on one side of the electronic balance, and has two first storage slots, in which first storage boxes are slidably installed, and two second storage slots, in which second storage boxes are slidably installed.

[0010] Preferably, a positioning protrusion is fixedly mounted on one side of the electronic balance, and a positioning groove is opened on one side of the storage cabinet, and the positioning protrusion is plugged into and matched with the positioning groove.

[0011] Preferably, plastic blocks and glass blocks are respectively installed in the two second storage boxes.

[0012] Preferably, the fine-tuning device includes a first limit column and a second limit column, both of which are fixedly installed on the top of the storage cabinet, a threaded rod is slidably installed on the first limit column, a turning handle is fixedly installed on one end of the threaded rod, and a limit rod is slidably installed on the second limit column.

[0013] Preferably, a first hole is formed at one end of the threaded rod away from the handle, and the threaded rod is movably mounted on the first limiting column through the first hole. A second hole is formed at one end of the limiting rod, and the limiting rod is movably mounted on the second limiting column through the second hole.

[0014] Preferably, a connecting plate is threadedly installed on the threaded rod, and the connecting plate is slidably installed on the limit rod. A clamping groove is provided at one end of the connecting plate away from the threaded rod, a suspension platform is installed at one end of the connecting plate, a protrusion is fixedly installed at one end of the suspension platform, the suspension platform is slidably installed in the clamping groove through the protrusion, a suspension groove is provided on the suspension platform, and a through groove is provided in the suspension groove.

[0015] Preferably, the sealing device comprises a card block, the card block is fixedly mounted on the four corners of the electronic balance, a card slot is provided on the card block, a glass cover is slidably mounted in the glass cover, and a perforation is provided on the top of the glass cover.

[0016] Preferably, the level adjustment device includes a platform plate, the electronic balance is fixedly mounted on the platform plate, threaded feet are fixedly mounted at the four corners of the bottom of the platform plate, threaded foot covers are threadedly mounted on the threaded feet, and a circular bubble level is fixedly mounted on the platform plate.

[0017] A method for disassembling and assembling a high-precision Coulomb force device, the specific steps are as follows:

[0018] S1. Calibrate the operating platform. Check whether the platform is flat by observing the circular bubble level on the platform. If the bubble on the circular bubble level is not in the center, turn and adjust the threaded foot caps at the four corners according to the tilt until the platform reaches a horizontal state.

[0019] S2. Preparation of test materials: Depending on the test to be performed, the second metal disc and the first metal disc are selectively rubbed against a plastic block or a glass block to make it positively charged or negatively charged;

[0020] S3, prepare the environment, place the first insulating base as the bottom surface at the center of the electronic balance, and snap the glass cover into the slot so that the glass cover covers the space above the electronic balance, and place the second metal disc as the bottom surface through the through slot on the suspension table and hang the suspension disc in the suspension slot. At this time, the second metal disc is located directly above the first metal disc;

[0021] S4. Start the test. Taking the first metal disc and the second metal disc both carrying negative charges as an example, operate the electronic balance to return its value to zero, then slowly turn the handle, and adjust the rotation direction of the handle to make the connecting plate drop. When the connecting plate drops, it will drive the second metal disc to drop. When the second metal disc gradually approaches the first metal disc, it will be affected by the Coulomb force. The negative charge on the second metal disc will hold against the negative charge on the first metal disc to generate a Coulomb force. After the first metal disc is subjected to force, the force will be displayed on the electronic balance, and the test is completed.

[0022] (III) Beneficial effects

[0023] The present invention provides a high-precision Coulomb force device and a method of using the same. The invention has the following beneficial effects:

[0024] 1. When testing the present invention, the suspension sheet is suspended on the suspension platform. By rotating the handle, the threaded rod engages with the connecting plate when the handle rotates, so that the second metal disc can be driven to move smoothly and gradually. During the test, students can rotate the handle while observing the changes in the numerical readings on the electronic balance when the second metal disc gradually approaches the first metal disc, so as to more conveniently explore the problem of the size of the distance and the generated Coulomb force.

[0025] 2. The present invention provides threaded feet and threaded foot covers. When in use, the threaded foot covers are used in conjunction with a circular bubble level as an observation reference. The threaded foot covers are rotated separately to allow the threaded foot covers to slide on the threaded feet, thereby adjusting the height of the four corners of the platform board from the ground respectively. This allows the user to conveniently calibrate the platform board to keep it stable according to different demonstration environments.

[0026] 3. In the present invention, a plurality of storage spaces are arranged on the storage cabinet on one side of the electronic balance. A detachable test device can be stored in the first storage box. A plastic block and a glass block are respectively arranged in the second storage box. Friction of the plastic block with the first metal disc and the second metal disc can make the second metal disc and the first metal disc carry negative charge. Friction of the first metal disc and the second metal disc with the glass block can make the first metal disc and the second metal disc carry positive charge, thereby quickly creating the environment required for the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the first insulating rod and the first metal disc and other structures of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the positioning protrusion and the clamping block of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the structure of the plastic block and the glass block of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the first storage slot and the second storage slot of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the suspension groove and the through groove etc. of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the first set of holes and the second set of holes of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the first metal disc and the second metal disc of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of the threaded foot column and threaded foot cover structures of the present invention.

[0036] Among them, 1. electronic balance; 2. test device; 3. storage device; 4. fine-tuning device; 5. closing device; 6. level adjustment device; 200. first insulating base; 201. first insulating rod; 202. first metal disc; 203. second insulating rod; 204. second metal disc; 205. scale line; 206. suspension sheet; 300. storage cabinet; 301. first storage slot; 302. first storage box; 303. second storage slot; 304. second storage box; 305. positioning protrusion; 306. positioning slot; 307. Plastic block; 308, glass block; 400, first limit column; 401, threaded rod; 402, handle; 403, first set of holes; 404, second limit column; 405, limit rod; 406, second set of holes; 407, connecting plate; 408, snap-in groove; 409, suspension platform; 410, suspension groove; 411, through groove; 412, protrusion; 500, block; 501, slot; 502, glass cover; 503, perforation; 600, platform plate; 601, threaded foot column; 602, threaded foot cover; 603, round bubble level. DETAILED DESCRIPTION

[0037] 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 described embodiments 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 without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] 1. As Figure 1-9 As shown, an embodiment of the present invention provides a high-precision Coulomb force device, including an electronic balance 1. In order to smoothly adjust the suspension height of the metal sheet suspended above, a horizontal adjustment device 6 is provided at the bottom of the electronic balance 1, a storage device 3 is provided on one side of the electronic balance 1, a fine-tuning device 4 is provided on the storage device 3, a closing device 5 is provided on the electronic balance 1, and a test device 2 is provided on the electronic balance 1. The test device 2 is used to perform a test, the test device is stored by the storage device 3, the test device 2 is fine-tuned by the fine-tuning device 4, a closed space is created by the closing device 5, and the horizontality of the plane is adjusted by the horizontal adjustment device 6;

[0040] In order to realize the function of the Coulomb force teaching experiment, the test device 2 includes a first insulating base 200 and a second insulating rod 203. The first insulating base 200 is fixedly mounted with a first insulating rod 201. The first insulating rod 201 is fixedly mounted with a first metal disc 202 at one end away from the first insulating base 200. The second insulating rod 203 is fixedly mounted with a second metal disc 204 at one end. The second insulating rod 203 is fixedly mounted with a suspension sheet 206 at one end away from the second metal disc 204. The second insulating rod 203 is provided with a scale line 205, and the fine-tuning device 4 includes a first limiting column 400 and a second limiting column 404, both of which are fixedly mounted on the top of the storage cabinet 300, a threaded rod 401 is slidably mounted on the first limiting column 400, and a rotating handle 402 is fixedly mounted on one end of the threaded rod 401, and a limiting rod 405 is slidably mounted on the second limiting column 404, and a first set of holes 4 is opened at one end of the threaded rod 401 away from the rotating handle 402 03, the threaded rod 401 is movably mounted on the first limiting column 400 through the first set of holes 403, the limiting rod 405 has a second set of holes 406 at one end, the limiting rod 405 is movably mounted on the second limiting column 404 through the second set of holes 406, the threaded rod 401 is threadedly mounted with a connecting plate 407, the connecting plate 407 is slidably mounted on the limiting rod 405, the connecting plate 407 is away from the threaded rod 401. The end of the connecting plate 407 is provided with a clamping groove 408, and a suspension platform 407 is installed at one end 09, a protrusion 412 is fixedly installed at one end of the suspension platform 409, and the suspension platform 409 is slidably installed in the card slot 408 through the protrusion 412. A suspension slot 410 is opened on the suspension platform 409, and a through slot 411 is opened in the suspension slot 410. The closing device 5 includes a card block 500, and the card block 500 is fixedly installed at the four corners of the electronic balance 1. The card block 500 is opened with a card slot 501, and a glass cover 502 is slidably installed in the glass cover 502, and a through hole 503 is opened on the top of the glass cover 502.

[0041] A method for disassembling and assembling a high-precision Coulomb force device, the specific steps are as follows:

[0042] S1. Calibrate the operating platform. Determine whether the platform 600 is flat by observing the circular bubble level 603 on the platform 600. If the bubble on the circular bubble level 603 is not in the center, turn and adjust the threaded foot covers 602 at the four corners according to the tilt until the platform 600 reaches a horizontal state.

[0043] S2. Preparation of test materials. Depending on the test to be performed, the second metal disc 204 and the first metal disc 202 are selectively rubbed against the plastic block 307 or the glass block 308 to make them positively charged or negatively charged;

[0044] S3, prepare the environment, place the first insulating base 200 as the bottom surface at the center of the electronic balance 1, and insert the glass cover 502 into the slot 501, so that the glass cover 502 covers the space above the electronic balance 1, and use the second metal disc 204 as the bottom surface to pass it through the through slot 411 on the suspension platform 409 and make the suspension sheet 206 hang in the suspension slot 410, at this time, the second metal disc 204 is located directly above the first metal disc 202;

[0045] S4. Start the test. Taking the first metal disc 202 and the second metal disc 204 both carrying negative charges as an example, operate the electronic balance 1 to reset its value to zero, then slowly turn the handle 402. By adjusting the rotation direction of the handle 402, the connecting plate 407 is lowered. When the connecting plate 407 descends, it will drive the second metal disc 204 to descend. When the second metal disc 204 gradually approaches the first metal disc 202, it is affected by the Coulomb force. The negative charge on the second metal disc 204 will resist the negative charge on the first metal disc 202 to generate a Coulomb force. After the first metal disc 202 is subjected to the force, the force will be displayed on the electronic balance 1, and the test is completed.

[0046] During the test, align the positioning groove 306 on the storage cabinet 300 with the positioning protrusion 305 and insert it, so as to ensure that the suspension platform 409 can be located at the center of the electronic balance 1 after installation, thread the threaded rod 401 through the connecting plate 407, and sleeve the threaded rod 401 on the first limiting column 400, pass the limiting rod 405 through the connecting plate 407 and sleeve it on the second limiting column 404, and insert the suspension platform 409 into the through groove 411 through the protrusion 412. The through groove 411 and the protrusion 412 are interference fit, that is, the through groove 411 and the protrusion 412 are interference fit. The groove profile size of the groove 411 is equal to or slightly smaller than the outer profile size of the protrusion 412, so as to ensure that the protrusion 412 is sufficiently tight when inserted to avoid slipping. Then, the test materials are prepared. The first metal disc 202 and the second metal disc 204 are rubbed against the plastic block 307 to make it carry a negative charge. The first metal disc 202 and the second metal disc 204 are rubbed against the glass block 308 to make the first metal disc 202 and the second metal disc 204 carry a positive charge. The first insulating base 200 is used as the bottom. The first metal disc 204 is placed at the center of the electronic balance 1, and the glass cover 502 is inserted into the card slot 501. Then, the second metal disc 204 is used as the bottom surface, and the second metal disc 204 is passed through the through slot 411, and the suspension sheet 206 is hung in the suspension slot 410. At this time, the second metal disc 204 is located directly above the first metal disc 202. At this time, the reading of the electronic balance 1 is reset to zero, and the handle 402 is slowly rotated. When the handle 402 rotates, it will engage with the connecting plate 407 through the threaded rod 401 and drive the connecting plate 407. Lift and lower on the threaded rod 401, by adjusting the direction of the handle 402, the connecting plate 407 slowly descends, and when the connecting plate 407 descends, the second metal disc 204 gradually descends slowly. When the second metal disc 204 gradually approaches the first metal disc 202, if the first metal disc 202 and the second metal disc 204 carry the same charge, a positive reading will be displayed on the electronic balance 1, and if the first metal disc 202 and the second metal disc 204 carry different charges, the electronic balance 1 will display a negative reading.

[0047] Embodiment 2:

[0048] like Fig. 9 As shown, the embodiment of the present invention provides a high-precision Coulomb force device, which is further expanded according to the content of the specific embodiment 1:

[0049] In order to keep the device level, the horizontal adjustment device 6 includes a platform plate 600, and the electronic balance 1 is fixedly installed on the platform plate 600. Threaded feet 601 are fixedly installed at the four corners of the bottom of the platform plate 600, and threaded foot covers 602 are threadedly installed on the threaded foot covers 601. A circular bubble level 603 is fixedly installed on the platform plate 600. When in use, first adjust the levelness of the platform plate 600, and by observing the position of the bubble on the circular bubble level 603, rotate the threaded foot covers 602 respectively, so that the threaded foot covers 602 can slide on the threaded foot covers 601, thereby adjusting the height of the four corners of the platform plate 600 from the ground respectively, so that the user can easily calibrate the platform plate 600 according to different demonstration environments to keep it stable.

[0050] Embodiment three:

[0051] like Figure 4 and Figure 5 As shown, the embodiment of the present invention provides a high-precision Coulomb force device, which is further expanded according to the content of the specific embodiment 2:

[0052] In order to facilitate the storage and storage of the test device, the storage device 3 includes a storage cabinet 300, which is installed on one side of the electronic balance 1. The storage cabinet 300 has two first storage slots 301, and a first storage box 302 is slidably installed in the first storage slot 301. The storage cabinet 300 has two second storage slots 303, and a second storage box 304 is slidably installed in the second storage slot 303. A positioning protrusion 305 is fixedly installed on one side of the electronic balance 1, and a positioning slot 306 is opened on one side of the storage cabinet 300. The positioning protrusion 305 is plugged into the positioning slot 306. Plastic blocks 307 and glass blocks 308 are respectively installed in the two second storage boxes 304. After the test is completed, the parts can be disassembled, the test device can be placed in the first storage box 302 for storage, and the positioning slot 306 on the storage cabinet 300 is aligned with the positioning protrusion 305 and inserted, so as to ensure that the suspension platform 409 can be located at the center of the electronic balance 1 after installation.

[0053] Working principle: When in use, first adjust the levelness of the platform plate 600, observe the position of the bubble on the circular bubble level 603, and rotate the threaded foot covers 602 respectively, so that the threaded foot covers 602 can slide on the threaded foot posts 601, thereby adjusting the height of the four corners of the platform plate 600 from the ground respectively, so that the user can easily calibrate the platform plate 600 according to different demonstration environments to keep it stable. After adjustment, align the positioning groove 306 on the storage cabinet 300 with the positioning protrusion 305 and insert it, so as to ensure that the suspension platform 409 can be located at the center of the electronic balance 1 after installation, and thread the threaded rod 401 through the connecting plate 407, and The threaded rod 401 is sleeved on the first limiting column 400, the limiting rod 405 passes through the connecting plate 407 and is sleeved on the second limiting column 404, and the suspension platform 409 is inserted into the through groove 411 through the protrusion 412. The through groove 411 and the protrusion 412 are interference fit, that is, the groove profile size of the through groove 411 is equal to or slightly smaller than the outer profile size of the protrusion 412, so that the protrusion 412 can be inserted tightly enough to avoid slipping, and then the test materials are prepared. The first metal disc 202 and the second metal disc 204 are rubbed against the plastic block 307 to make it carry negative charge, and the first metal disc 202 and the second metal disc 204 are rubbed against the glass block 3 08 can make the first metal disc 202 and the second metal disc 204 carry positive charge, place the first insulating base 200 as the bottom surface at the center of the electronic balance 1, and insert the glass cover 502 into the card slot 501, then use the second metal disc 204 as the bottom surface, pass the second metal disc 204 through the through slot 411, and hang the suspension sheet 206 in the suspension slot 410. At this time, the second metal disc 204 is located directly above the first metal disc 202. At this time, the reading of the electronic balance 1 is cleared, and the handle 402 is slowly rotated. When the handle 402 rotates, it will engage with the connecting plate 407 through the threaded rod 401 and drive the connecting plate 407 to rotate on the threaded rod. The rod 401 is raised and lowered, and the connecting plate 407 is slowly lowered by adjusting the direction of the handle 402. When the connecting plate 407 is lowered, the second metal disc 204 gradually and slowly lowers. When the second metal disc 204 gradually approaches the first metal disc 202, if the first metal disc 202 and the second metal disc 204 carry the same charge, a positive reading will be displayed on the electronic balance 1. If the first metal disc 202 and the second metal disc 204 carry different charges, the electronic balance 1 will display a negative reading. After the experiment is over, the parts can be disassembled and the test device can be placed in the first storage box 302 for storage. At this point, the entire Coulomb force teaching experiment is completed.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision Coulomb force device, comprising an electronic balance (1), characterized in that: The bottom of the electronic balance (1) is provided with a level adjustment device (6), one side of the electronic balance (1) is provided with a storage device (3), the storage device (3) is provided with a fine adjustment device (4), the electronic balance (1) is provided with a sealing device (5), and the electronic balance (1) is provided with a test device (2); The test device (2) comprises a first insulating base (200) and a second insulating rod (203); the first insulating base (200) is fixedly mounted with a first insulating rod (201); an end of the first insulating rod (201) away from the first insulating base (200) is fixedly mounted with a first metal disc (202); an end of the second insulating rod (203) is fixedly mounted with a second metal disc (204); an end of the second insulating rod (203) away from the second metal disc (204) is fixedly mounted with a suspension sheet (206); and a scale mark (205) is provided on the second insulating rod (203).

2. A high-precision Coulomb force device according to claim 1, characterized in that: The storage device (3) comprises a storage cabinet (300), the storage cabinet (300) being installed on one side of the electronic balance (1), the storage cabinet (300) being provided with two first storage slots (301), a first storage box (302) being slidably installed in the first storage slots (301), and the storage cabinet (300) being provided with two second storage slots (303), a second storage box (304) being slidably installed in the second storage slots (303).

3. A high-precision Coulomb force device according to claim 2, characterized in that: A positioning protrusion (305) is fixedly mounted on one side of the electronic balance (1), and a positioning groove (306) is provided on one side of the storage cabinet (300), and the positioning protrusion (305) is plugged into and matched with the positioning groove (306).

4. A high-precision Coulomb force device according to claim 3, characterized in that: A plastic block (307) and a glass block (308) are respectively installed in the two second storage boxes (304).

5. A high-precision Coulomb force device according to claim 2, characterized in that: The fine-tuning device (4) comprises a first limiting column (400) and a second limiting column (404), wherein the first limiting column (400) and the second limiting column (404) are both fixedly mounted on the top of the storage cabinet (300), a threaded rod (401) is slidably mounted on the first limiting column (400), a rotating handle (402) is fixedly mounted on one end of the threaded rod (401), and a limiting rod (405) is slidably mounted on the second limiting column (404).

6. A high-precision Coulomb force device according to claim 5, characterized in that: A first hole (403) is formed at one end of the threaded rod (401) away from the rotating handle (402), and the threaded rod (401) is movably mounted on the first limiting column (400) through the first hole (403). A second hole (406) is formed at one end of the limiting rod (405), and the limiting rod (405) is movably mounted on the second limiting column (404) through the second hole (406).

7. A high-precision Coulomb force device according to claim 6, characterized in that: A connecting plate (407) is threadedly mounted on the threaded rod (401), and the connecting plate (407) is slidably mounted on the limiting rod (405). A clamping groove (408) is formed at one end of the connecting plate (407) away from the threaded rod (401). A suspension platform (409) is mounted at one end of the connecting plate (407), and a protrusion (412) is fixedly mounted at one end of the suspension platform (409). The suspension platform (409) is slidably mounted in the clamping groove (408) via the protrusion (412). A suspension groove (410) is formed on the suspension platform (409), and a through groove (411) is formed in the suspension groove (410).

8. A high-precision Coulomb force device according to claim 1, characterized in that: The sealing device (5) comprises a card block (500), the card block (500) is fixedly mounted at four corners of the electronic balance (1), a card slot (501) is formed on the card block (500), a glass cover (502) is slidably mounted inside the glass cover (502), and a through hole (503) is formed on the top of the glass cover (502).

9. A high-precision Coulomb force device according to claim 1, characterized in that: The level adjustment device (6) comprises a platform plate (600), the electronic balance (1) is fixedly mounted on the platform plate (600), threaded foot posts (601) are fixedly mounted at the four corners of the bottom of the platform plate (600), threaded foot covers (602) are threadedly mounted on the threaded foot posts (601), and a circular bubble level (603) is fixedly mounted on the platform plate (600).

10. A method for disassembling and assembling a high-precision Coulomb force device, characterized in that: The specific steps are as follows: S1, calibrating the operating platform, judging whether the platform plate (600) is flat by observing the circular bubble level (603) on the platform plate (600); if the bubble on the circular bubble level (603) is not at the center, rotating and adjusting the threaded foot covers (602) at the four corners according to the tilting condition, until the plane of the platform plate (600) reaches a horizontal state; S2. Preparation of test materials: According to different tests to be performed, the second metal disc (204) and the first metal disc (202) are selectively rubbed against a plastic block (307) or a glass block (308) to make them positively charged or negatively charged; S3, prepare the environment, place the first insulating base (200) as the bottom surface at the center of the electronic balance (1), and insert the glass cover (502) into the slot (501) so that the glass cover (502) covers the space above the electronic balance (1), and use the second metal disc (204) as the bottom surface to pass it through the through slot (411) on the suspension platform (409) and hang the suspension sheet (206) in the suspension slot (410), at which time the second metal disc (204) is located directly above the first metal disc (202); S4. Start the test. Take the first metal disc (202) and the second metal disc (204) both carrying negative charges as an example. Operate the electronic balance (1) to reset its value to zero. Then slowly rotate the handle (402). By adjusting the rotation direction of the handle (402), the connecting plate (407) is lowered. When the connecting plate (407) is lowered, it drives the second metal disc (204) to be lowered. When the second metal disc (204) gradually approaches the first metal disc (202), it is affected by the Coulomb force. The negative charge on the second metal disc (204) and the negative charge on the first metal disc (202) are held together to generate the Coulomb force. When the first metal disc (202) is subjected to the force, the force is displayed on the electronic balance (1). Thus, the test is completed.

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