Voltmeter with protection function

Abstract

The application relates to the technical field of electronic measuring instruments, and discloses a voltmeter with a protection function, which comprises a voltmeter body, the outer surface of the voltmeter body is clamped with a first box body, a first clamping groove is arranged at the bottom of the first box body, a vibration absorption protection mechanism is clamped in the first clamping groove, the top of the vibration absorption protection mechanism is fixedly connected with the bottom of the voltmeter body, and horizontal sensors are fixedly connected to the upper surface and the lower surface of the voltmeter body. The voltmeter with the protection function is provided with a gravity center adjusting mechanism, so that the gravity center of the voltmeter body can be accurately offset to one side away from a dial plate; due to the gravity center offset, the side away from the dial plate can bear the impact, the direct collision and damage to the dial plate are reduced, the integrity of the dial plate is effectively protected, and in addition, part of the vibration can be absorbed, so that the precision elements in the voltmeter are protected.

Description

Technical Field

[0001] This invention relates to the field of electronic measuring instrument technology, specifically to a voltmeter with protection functions. Background Technology

[0002] In the modern electrical field, accurate voltage measurement is crucial for equipment operation monitoring, energy management, and fault diagnosis. Whether it is equipment such as motors and frequency converters in industrial production or household appliances in daily life, power measurement is necessary to ensure their normal operation and efficient energy use. This makes voltage measurement essential, as it helps users understand the energy consumption of equipment so that they can take energy-saving measures and reduce energy costs. At the same time, power measurement is also an indispensable part of the operation and maintenance of power systems. It helps power engineers monitor the load on the power grid and ensure the stable operation of the power system.

[0003] In modern society, with the widespread application of electronic devices and the increasing importance of energy management, the demand for voltage measurement is constantly increasing. Whether in industrial production, scientific research experiments, or daily life, it is necessary to accurately measure the power consumption of various electrical devices in order to perform equipment debugging, fault diagnosis, energy management, and cost control. At the same time, with the acceleration of people's pace of life and the diversification of work methods, the requirements for the portability of measuring tools are also getting higher and higher.

[0004] Existing voltmeters often fail to provide effective protection against accidents during use or transport. Even minor impacts can damage internal precision components, leading to decreased measurement accuracy. Severe impacts can cause significant physical damage, such as cracked casings and damaged displays, and internal components may be severely damaged or even completely destroyed, reducing work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a voltmeter with protective functions to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A voltmeter with protective function, comprising a voltmeter body, a first housing being snapped onto the outer surface of the voltmeter body, a first slot being formed at the bottom of the first housing, a vibration-absorbing protection mechanism being snapped into the first slot, the top of the vibration-absorbing protection mechanism being fixedly connected to the bottom of the voltmeter body, a level sensor being fixedly connected to both the upper and lower surfaces of the voltmeter body, a first ventilation slot and an extension slot being formed on the outer surface of the first housing, an extension protection mechanism being snapped into the extension slot, the bottom of the extension protection mechanism being fixedly connected to the outer surface of the voltmeter body, and further comprising:

[0007] A center-of-gravity adjustment mechanism is fixedly connected to the outer surface of the voltmeter body. The center-of-gravity adjustment mechanism includes a second housing, which is fixedly connected to the outer surface of the voltmeter body. A second ventilation slot is provided at the left end of the second housing, and a second slot is provided at the right side of the second housing. The second slot penetrates the upper surface of the second housing. A first flexible bellows cover is fixedly connected inside the second slot. An airflow sensor is fixedly connected inside the second ventilation slot. A circular electromagnet is fixedly connected to the top of the second housing through a through hole. A first limiting shaft and a second limiting shaft are fixedly connected to the inner wall of the second housing. A first rotating rod is rotatably connected to the outer surface of the first limiting shaft, and a second rotating rod is rotatably connected to the outer surface of the second limiting shaft.

[0008] According to the above technical solution, the center of gravity adjustment mechanism further includes the first rotating shaft, the inner left surface of the first rotating rod is fixedly connected to the first rotating shaft, the top of the first rotating shaft is fixedly connected to the inner left surface of the second rotating rod, a magnetic rotating rod is rotatably connected to the outer surface of the first rotating shaft, a first limiting block and a second limiting block are fixedly connected to the inner surface of the second housing, a first spring is fixedly connected to the right side of the second limiting block, a slot connecting block is fixedly connected to the right side of the first spring, a second rotating shaft is fixedly connected to the inner right surface of the first rotating rod, and the top of the second rotating shaft is fixedly connected to the inner left surface of the second rotating rod. The inner right surface of the rotating rod is fixedly connected to a locking block rotating rod, and the outer surface of the second rotating shaft is rotatably connected to the locking block rotating rod. The locking block rotating rod is engaged with the locking slot connecting block. The right side of the locking slot connecting block is fixedly connected to a first connecting block. The bottom of the first connecting block is engaged with the second locking slot. The top of the first connecting block is fixedly connected to a second locking slot connecting block. The second locking slot connecting block and the second locking slot are engaged with the top part of the second box body. The right side of the first connecting block is fixedly connected to a heavy circular column. The outer surface of the heavy circular column is fixedly connected to a first locking block, and the first locking block is engaged with the second locking slot.

[0009] According to the above technical solution, the vibration absorption protection mechanism includes a sleeve, which is fixedly connected to the outer surface of the voltmeter body. A second flexible bellows cover is fixedly connected to the bottom of the sleeve. A first base plate is fixedly connected to the bottom of the second flexible bellows cover. A rubber base plate is fixedly connected to the bottom of the first base plate. An elastic component is fixedly connected to the bottom of the first base plate. The elastic component includes a second annular electromagnet. The base plate of the second annular electromagnet is fixedly connected to the top of the first base plate. A first annular electromagnet and a second spring are fixedly connected to the right side of the voltmeter body. The bottom of the second spring is fixedly connected to the top of the first base plate. A first circular column is fixedly connected inside the second spring. A slotted circular column is fixedly connected to the first circular column through a through hole. A rubber vibration-absorbing ball is engaged inside the slotted circular column through a slot.

[0010] According to the above technical solution, the extension protection mechanism includes a leaf spring. The bottom of the leaf spring is fixedly connected to the outer surface of the voltmeter body. A first rubber support column and a second rubber support column are fixedly connected to the outer surface of the voltmeter body. A third housing is fixedly connected to the top of the first and second rubber support columns. A first air spring is fixedly connected to the top of the leaf spring. A second air spring is fixedly connected to the top of the first air spring. A third annular electromagnet is slidably connected inside the first air spring. A second circular column is fixedly connected inside the third annular electromagnet. A fourth annular electromagnet is slidably connected to the outer surface of the second circular column. The fourth annular electromagnet is fixedly connected to the second air spring. The bottom plate of the third housing is secured to the second circular column through a through hole. A first pusher is fixedly connected to the top of the second circular column. The third housing has a second push plate fixedly connected to the upper surface of its inner wall. A first extension column is snapped into the interior of the third housing. An extension assembly is fixedly connected to the right side of the first extension column. Two sets of extension assemblies are symmetrically arranged. Each extension assembly includes a second connecting block, which is fixedly connected to the first extension column. The right side of the second connecting block is rotatably connected to a first rotating shaft connecting block via a rotating shaft. The right side of the first rotating shaft connecting block is rotatably connected to a second rotating shaft connecting block via a rotating shaft. The right side of the second rotating shaft connecting block is rotatably connected to a third rotating shaft connecting block via a rotating shaft. The third rotating shaft connecting block is rotatably connected to a fourth rotating shaft connecting block via a rotating shaft. The fourth rotating shaft connecting block is rotatably connected to a limit pull block via a rotating shaft. A second extension column is snapped into the interior of the third housing. Symmetrically arranged extension assemblies are fixedly connected to the left side of the second extension column.

[0011] According to the above technical solution, the upper surface of the magnetic rotating rod is in contact with the lower surface of the circular electromagnet, the length of the second limiting block is the same as the distance between the first rotating rod and the second rotating rod, both the first limiting block and the second limiting block are in contact with the outer surface of the magnetic rotating rod, a heavy circular column is connected to a through hole on the right side of the second housing, and four sets of the center of gravity adjustment mechanism are symmetrically arranged on the outer surface of the voltmeter body.

[0012] According to the above technical solution, four sets of elastic components are symmetrically arranged on the top of the first base plate, and the first base plate and the rubber base plate are engaged with the first slot.

[0013] According to the above technical solution, the extension component and the symmetrically arranged extension components are rotatably connected by a limiting pull block, the third housing is engaged with the extension groove, and the extension protection mechanism is symmetrically arranged in four sets on the outer surface of the voltmeter body.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This voltmeter with protective function has a center of gravity adjustment mechanism that precisely shifts the center of gravity of the voltmeter body to the side away from the dial. Due to the shift in the center of gravity, the side away from the dial bears the impact, reducing direct bumps and damage to the dial and effectively protecting the integrity of the dial. In addition, it can also absorb some vibration, which is beneficial to protecting the precision components inside the voltmeter.

[0016] 2. This voltmeter with protective functions, through the setting of a vibration absorption protection mechanism and the setting of a center of gravity adjustment mechanism, absorbs the concentrated vibration caused by the impact being concentrated on the side away from the dial due to the center of gravity shift. This reduces the damage caused by concentrated vibration to the structure and internal components of the voltmeter, which not only extends the service life of the voltmeter and reduces the cost of maintenance and replacement, but also ensures the smooth progress of various tasks and experiments.

[0017] 3. This voltmeter with protective features incorporates an extension protection mechanism. This mechanism protects the voltmeter from impact when the falling distance is insufficient to ensure the side furthest from the dial remains downward, as the voltmeter's center of gravity shifts during the descent. It provides a buffer against impacts, further reducing damage to the voltmeter. Simultaneously, it addresses the issue of rotation during descent due to center of gravity shift, which could prevent the side furthest from the dial from remaining downward, thus maximizing the protection of the dial and critical internal components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 This is a partial schematic diagram of the main structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the first housing of the present invention.

[0021] Figure 4 This is a cross-sectional view of the structure of the second housing of the present invention.

[0022] Figure 5 This is a schematic diagram of the center of gravity adjustment mechanism of the present invention.

[0023] Figure 6 This is a cross-sectional view of the center of gravity adjustment mechanism of the present invention.

[0024] Figure 7 This is a schematic diagram of the vibration absorption protection mechanism of the present invention.

[0025] Figure 8 This is a cross-sectional view of the structure of the elastic component of the present invention.

[0026] Figure 9 This is a schematic diagram of the extension protection mechanism of the present invention.

[0027] Figure 10 This is a cross-sectional view of the extension protection mechanism of the present invention.

[0028] In the diagram: 1. Voltmeter body; 2. First housing;

[0029] 3. Center of gravity adjustment mechanism;

[0030] 301. Second housing; 302. Second ventilation slot; 303. Second slot; 304. First flexible bellows cover; 305. Air volume sensor; 306. Circular electromagnet; 307. Magnetic rotating rod; 308. First rotating shaft; 309. First limiting block; 310. Second limiting block; 311. First limiting rotating shaft; 312. First rotating rod; 313. Second limiting rotating shaft; 314. Second rotating rod; 315. First spring; 316. Slot connecting block; 317. First connecting block; 318. Block rotating rod; 319. Second rotating shaft; 320. Second slot connecting block; 321. Heavy circular column; 322. First blocking block;

[0031] 4. First ventilation slot; 5. First card slot;

[0032] 6. Vibration absorption protection mechanism;

[0033] 601. Card sleeve; 602. Second flexible bellows cover; 603. First base plate; 604. Rubber base plate;

[0034] 6001, Flexible Components;

[0035] 605. First annular electromagnet; 606. Second annular electromagnet; 607. Second spring; 608. First circular post; 609. Circular post with slot; 610. Rubber vibration-absorbing ball;

[0036] 7. Horizontal sensor; 8. Extension groove;

[0037] 9. Extension protection mechanism;

[0038] 901. Leaf spring; 902. First rubber support column; 903. Second rubber support column; 904. Third annular electromagnet; 905. Second circular column; 906. First air spring; 907. Second air spring; 908. Fourth annular electromagnet; 909. Third housing; 910. First push plate; 911. Second push plate; 912. First extension column;

[0039] 9001, Extension Component;

[0040] 913. Second connecting block; 914. First rotating shaft connecting block; 915. Second rotating shaft connecting block; 916. Third rotating shaft connecting block; 917. Fourth rotating shaft connecting block;

[0041] 918. Limiting block; 919. Second extension column. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0044] 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Example 1: See Figures 1-6The present invention provides a technical solution: a voltmeter with protective function, comprising a voltmeter body 1, a first housing 2 snapped onto the outer surface of the voltmeter body 1, a first slot 5 formed at the bottom of the first housing 2, a vibration absorption protection mechanism 6 snapped into the inside of the first slot 5, the top of the vibration absorption protection mechanism 6 fixedly connected to the bottom of the voltmeter body 1, a level sensor 7 fixedly connected to both the upper and lower surfaces of the voltmeter body 1, a first ventilation slot 4 and an extension slot 8 formed on the outer surface of the first housing 2, an extension protection mechanism 9 snapped into the inside of the extension slot 8, the bottom of the extension protection mechanism 9 fixedly connected to the outer surface of the voltmeter body 1, and further comprising:

[0046] The center of gravity adjustment mechanism 3 is fixedly connected to the outer surface of the voltmeter body 1. The center of gravity adjustment mechanism 3 includes a second housing 301, which is fixedly connected to the outer surface of the voltmeter body 1. A second ventilation slot 302 is provided at the left end of the second housing 301, and a second slot 303 is provided at the right side of the second housing 301. The second slot 303 penetrates the upper surface of the second housing 301. A first flexible bellows cover 304 is fixedly connected inside the second slot 303. An air volume sensor 305 is fixedly connected inside the second ventilation slot 302. A circular electromagnet 306 is fixedly connected to the top of the second housing 301 through a through hole. A first limiting shaft 311 and a second limiting shaft 313 are fixedly connected to the inner wall of the second housing 301. A first rotating rod 312 is rotatably connected to the outer surface of the first limiting shaft 311, and a second rotating rod 314 is rotatably connected to the outer surface of the second limiting shaft 313.

[0047] The center of gravity adjustment mechanism 3 also includes a first rotating shaft 308, with the left inner surface of the first rotating rod 312 fixedly connected to the first rotating shaft 308, the top of the first rotating shaft 308 fixedly connected to the left inner surface of the second rotating rod 314, and a magnetic rotating rod 307 rotatably connected to the outer surface of the first rotating shaft 308. A first limiting block 309 and a second limiting block 310 are fixedly connected to the inner surface of the second housing 301. A first spring 315 is fixedly connected to the right side of the second limiting block 310, and a slot connecting block 316 is fixedly connected to the right side of the first spring 315. A second rotating shaft 319 is fixedly connected to the right inner surface of the first rotating rod 312, with the top of the second rotating shaft 319 fixedly connected to the right inner surface of the second rotating rod 314. The outer surface of the second rotating shaft 319 is rotatably connected to a locking rod 318, which engages with a slot connecting block 316. A first connecting block 317 is fixedly connected to the right side of the slot connecting block 316. The bottom of the first connecting block 317 engages with the second slot 303. A second slot connecting block 320 is fixedly connected to the top of the first connecting block 317. The second slot connecting block 320 and the second slot 303 engage through the top part of the second housing 301. A heavy circular column 321 is fixedly connected to the right side of the first connecting block 317. A first locking block 322 is fixedly connected to the outer surface of the heavy circular column 321, and engages with the second slot 303.

[0048] The upper surface of the magnetic rotating rod 307 is in contact with the lower surface of the circular electromagnet 306. The length of the second limiting block 310 is the same as the distance between the first rotating rod 312 and the second rotating rod 314. Both the first limiting block 309 and the second limiting block 310 are in contact with the outer surface of the magnetic rotating rod 307. A heavy circular column 321 is attached to a through hole on the right side of the second housing 301. The center of gravity adjustment mechanism 3 is symmetrically arranged in four sets on the outer surface of the voltmeter body 1. By setting the center of gravity adjustment mechanism 3, the center of gravity of the voltmeter body 1 is shifted to the side away from the dial through the heavy circular column 321. Due to the shift of the center of gravity, the side away from the dial bears the impact, reducing direct bumps and damage to the dial and effectively protecting the integrity of the dial. In addition, it can also absorb some vibration, which is beneficial to protecting the precision components inside the voltmeter.

[0049] The working principle of this embodiment is as follows: When the voltmeter with protective function falls, the horizontal sensor 7 detects the horizontal tilt, and the air volume sensor 305 detects the air volume generated by the falling wind speed through the first ventilation slot 4 and the second ventilation slot 302, thereby activating the circular electromagnet 306. The circular electromagnet 306 activates and repels the magnetic rotating rod 307 to move downward. The first limiting block 309 and the second limiting block 310 limit its movement to only downward. The first rotating shaft 308 causes the first rotating rod 312 and the second rotating rod 314 to rotate around the first limiting rotating shaft 311 and the second limiting rotating shaft 313, driving the second rotating shaft 319 to rise and causing the locking block rotating rod 318 to move upward. Move it so that it disengages from the slot connecting block 316. At this time, the first spring 315, since it does not obstruct the movement of the slot connecting block 316, the first connecting block 317 and the second slot connecting block 320 along the second slot 303, and drives the heavy circular column 321 to move through the first locking block 322. In conjunction with the symmetrically arranged center of gravity adjustment mechanism, the center of gravity is shifted and adjusted so that the side away from the dial is downward. If a reset is required, the second slot connecting block 320 can be pushed to move along the second slot 303, so that the locking block rotating rod 318 is squeezed by the slot connecting block 316 and rotates along the second rotating shaft 319, and enters the slot of the slot connecting block 316 to achieve a reset.

[0050] Example 2: Please refer to Figures 7-10 Based on Embodiment 1, the present invention provides a technical solution: the vibration absorption protection mechanism 6 includes a retainer 601, which is fixedly connected to the outer surface of the voltmeter body 1. A second flexible bellows cover 602 is fixedly connected to the bottom of the retainer 601. A first base plate 603 is fixedly connected to the bottom of the second flexible bellows cover 602. A rubber base plate 604 is fixedly connected to the bottom of the first base plate 603. An elastic component 6001 is fixedly connected to the bottom of the first base plate 603. The elastic component 6001 includes a second annular electromagnet 606. The base plate of the second annular electromagnet 606 is fixedly connected to the top of the first base plate 603. The right side of the voltmeter body 1 is fixedly connected to the first annular electromagnet 605 and the second spring 607. The bottom of the second spring 607 is fixedly connected to the top of the first base plate 603. The inside of the second spring 607 is fixedly connected to the first circular column 608. The first circular column 608 is fixedly connected to the slotted circular column 609 through a through hole. The inside of the slotted circular column 609 is fitted with a rubber vibration-absorbing ball 610 through a slot.

[0051] Four sets of elastic components 6001 are symmetrically arranged on the top of the first base plate 603. The first base plate 603 and the rubber base plate 604 are engaged with the first slot 5. By setting the vibration absorption protection mechanism 6 and the second spring 607, the center of gravity adjustment mechanism 3 is set, which absorbs the concentrated vibration caused by the impact being concentrated on the side away from the dial due to the center of gravity shift. This reduces the damage caused by the concentrated vibration to the structure and internal components of the voltmeter, which not only extends the service life of the voltmeter and reduces the cost of maintenance and replacement, but also ensures the smooth progress of various operations and experiments.

[0052] The extension protection mechanism 9 includes a leaf spring 901. The bottom of the leaf spring 901 is fixedly connected to the outer surface of the voltmeter body 1. A first rubber support column 902 and a second rubber support column 903 are fixedly connected to the outer surface of the voltmeter body 1. A third housing 909 is fixedly connected to the top of the first rubber support column 902 and the second rubber support column 903. A first air spring 906 is fixedly connected to the top of the leaf spring 901. A second air spring 907 is fixedly connected to the top of the first air spring 906. A third annular electromagnet 904 is slidably connected inside the first air spring 906. A second circular column 905 is fixedly connected inside the third annular electromagnet 904. A fourth annular electromagnet 908 is slidably connected to the outer surface of the second circular column 905. The fourth annular electromagnet 908 is fixedly connected to the second air spring 907. The bottom plate of the third housing 909 is secured to the second circular column 905 through a through hole. A first push plate 910 is fixedly connected to the top of the second circular column 905. A second push plate 911 is fixedly connected to the upper surface of the inner wall of the third housing 909. A first extension column 912 is snapped into the interior of the third housing 909. An extension assembly 9001 is fixedly connected to the right side of the first extension column 912. Two sets of extension assemblies 9001 are symmetrically arranged. Each extension assembly 9001 includes a second connecting block 913, which is fixedly connected to the first extension column 912. The right side of the second connecting block 913 is rotatably connected to a first rotating shaft connecting block 914 via a rotating shaft. A second pivot connecting block 915 is rotatably connected to the right side of 4 via a pivot. A third pivot connecting block 916 is rotatably connected to the right side of the second pivot connecting block 915 via a pivot. A fourth pivot connecting block 917 is rotatably connected to the third pivot connecting block 916 via a pivot. A limit pull block 918 is rotatably connected to the fourth pivot connecting block 917 via a pivot. A second extension column 919 is snapped into the inside of the third housing 909. A symmetrically arranged extension assembly 9001 is fixedly connected to the left side of the second extension column 919.

[0053] The extension assembly 9001 is rotatably connected to the symmetrically arranged extension assembly 9001 via a limiting pull block 918. The third housing 909 is engaged with the extension groove 8. Four sets of extension protection mechanisms 9 are symmetrically arranged on the outer surface of the voltmeter body 1. By setting the extension protection mechanism 9, the first extension column 912 and the second extension column 919 protect the voltmeter body 1 from the impact when it falls due to a change in center of gravity, and the falling distance is insufficient to adjust the side away from the dial downwards. It can play a certain buffering role when withstanding the impact, further reducing damage to the voltmeter. At the same time, it can solve the problem that the voltmeter cannot ensure that the side away from the dial is always downwards during the falling process due to the shift in center of gravity. This maximizes the protection of the dial and internal key components.

[0054] The working principle of this embodiment is as follows: When the side away from the dial is facing downwards, the attraction between the first annular electromagnet 605 and the second annular electromagnet 606 is converted into repulsion, causing the elasticity of the second spring 607 to be released. This, together with the symmetrically arranged elastic component 6001, pushes the first base plate 603 and the rubber base plate 604 downwards and out of the first slot 5. When it falls to the ground and collides with it, the rubber base plate 604 absorbs part of the impact and vibration, which is then transmitted to the second spring 607 through the first base plate 603. The rubber shock-absorbing ball 610 absorbs impacts and vibrations inside the circular column 609 in the slot. If rotation occurs due to a shift in the center of gravity, the horizontal sensor 7 detects and activates the third annular electromagnet 904, causing it to attract the fourth annular electromagnet 908 upwards, thus moving the second circular column 905 upwards. At this time, the first air spring 906 and the second air spring 907, due to the attraction of the third annular electromagnet 904 and the fourth annular electromagnet 908, exhibit greater elasticity. The second circular column 905 pushes the first push plate 910 upwards, while the third housing 909 remains stable due to the limited deformation of the first rubber support column 902 and the second rubber support column 903. The first push plate 910 and the second push plate 911 simultaneously compress the extension assembly 9001, while the first rotating shaft connecting block... 914, 915, 916, and 917 are pressed to push the second connecting block 913. The second connecting block 913 pushes the first extension column 912 to move outward and extend. The second extension column 919 is also pushed outward by the symmetrically arranged extension components 9001. The limiting pull block 918 allows it to extend outward at the same time. In cooperation with the symmetrically arranged extension protection mechanism 9, the length of the extension on both sides is longer than the length of the voltmeter body 1. Therefore, when it comes into contact with the ground, the impact and vibration are transmitted through the first extension column 912 and the second extension column 919 to the leaf spring 901, the first rubber support column 902, the second rubber support column 903, the first air spring 906, and the second air spring 907 to absorb the impact and vibration and protect the voltmeter body 1.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A voltmeter with protective function, comprising a voltmeter body (1), wherein a first housing (2) is snapped onto the outer surface of the voltmeter body (1), a first slot (5) is provided at the bottom of the first housing (2), a vibration-absorbing protection mechanism (6) is snapped into the inside of the first slot (5), the top of the vibration-absorbing protection mechanism (6) is fixedly connected to the bottom of the voltmeter body (1), and a horizontal sensor (7) is fixedly connected to both the upper and lower surfaces of the voltmeter body (1), wherein a first ventilation slot (4) and an extension slot (8) are provided on the outer surface of the first housing (2), an extension protection mechanism (9) is snapped into the inside of the extension slot (8), and the bottom of the extension protection mechanism (9) is fixedly connected to the outer surface of the voltmeter body (1), characterized in that, It also includes a center of gravity adjustment mechanism (3); The center of gravity adjustment mechanism (3) is fixedly connected to the outer surface of the voltmeter body (1). The center of gravity adjustment mechanism (3) includes a second housing (301), which is fixedly connected to the outer surface of the voltmeter body (1). A second ventilation slot (302) is provided at the left end of the second housing (301), and a second slot (303) is provided at the right side of the second housing (301). The second slot (303) penetrates the upper surface of the second housing (301), and a first [missing information] is fixedly connected inside the second slot (303). A flexible bellows cover (304) is provided. An air volume sensor (305) is fixedly connected inside the second ventilation slot (302). A circular electromagnet (306) is fixedly connected to the top of the second housing (301) through a through hole. A first limiting shaft (311) and a second limiting shaft (313) are fixedly connected to the inner wall of the second housing (301). A first rotating rod (312) is rotatably connected to the outer surface of the first limiting shaft (311), and a second rotating rod (314) is rotatably connected to the outer surface of the second limiting shaft (313). The center of gravity adjustment mechanism (3) further includes a first rotating shaft (308), the inner left surface of the first rotating rod (312) is fixedly connected to the first rotating shaft (308), the top of the first rotating shaft (308) is fixedly connected to the inner left surface of the second rotating rod (314), a magnetic rotating rod (307) is rotatably connected to the outer surface of the first rotating shaft (308), a first limiting block (309) and a second limiting block (310) are fixedly connected to the inner surface of the second housing (301), a first spring (315) is fixedly connected to the right side of the second limiting block (310), a slot connecting block (316) is fixedly connected to the right side of the first spring (315), a second rotating shaft (319) is fixedly connected to the inner right surface of the first rotating rod (312), and the top of the second rotating shaft (319) is fixedly connected to the inner right surface of the second rotating rod (314). The outer surface of the second rotating shaft (319) is rotatably connected to a locking rod (318), which engages with a slot connecting block (316). A first connecting block (317) is fixedly connected to the right side of the slot connecting block (316). The bottom of the first connecting block (317) engages with a second slot (303). A second slot connecting block (320) is fixedly connected to the top of the first connecting block (317). The second slot connecting block (320) and the second slot (303) engage through the top part of the second box (301). A heavy circular column (321) is fixedly connected to the right side of the first connecting block (317). A first locking block (322) is fixedly connected to the outer surface of the heavy circular column (321). The first locking block (322) engages with the second slot (303). The extension protection mechanism (9) includes a leaf spring (901). The bottom of the leaf spring (901) is fixedly connected to the outer surface of the voltmeter body (1). A first rubber support column (902) and a second rubber support column (903) are fixedly connected to the outer surface of the voltmeter body (1). A third housing (909) is fixedly connected to the top of the first rubber support column (902) and the second rubber support column (903). A first air spring (906) is fixedly connected to the top of the leaf spring (901). A second air spring (907) is fixedly connected to the top of the first air spring (906). The first air spring (906) is internally slidably connected to a third annular electromagnet (904). The third annular electromagnet (904) is internally fixedly connected to a second circular column (905). The outer surface of the second circular column (905) is slidably connected to a fourth annular electromagnet (908). The fourth annular electromagnet (908) is fixedly connected to the second air spring (907). The bottom plate of the third housing (909) is secured to the second circular column (905) via a through hole. The top of the second circular column (905) is fixedly connected to a first push plate (910). The third housing... A second push plate (911) is fixedly connected to the upper surface of the inner wall of the body (909). A first extension column (912) is snapped into the inside of the third box (909). An extension assembly (9001) is fixedly connected to the right side of the first extension column (912). Two sets of extension assemblies (9001) are symmetrically arranged. Each extension assembly (9001) includes a second connecting block (913). The second connecting block (913) is fixedly connected to the first extension column (912). The right side of the second connecting block (913) is rotatably connected to a first rotating shaft connecting block (914) via a rotating shaft. A second rotating shaft connecting block (915) is rotatably connected to the right side of the connecting block (914) via a rotating shaft. A third rotating shaft connecting block (916) is rotatably connected to the right side of the second rotating shaft connecting block (915) via a rotating shaft. A fourth rotating shaft connecting block (917) is rotatably connected to the third rotating shaft connecting block (916) via a rotating shaft. A limit pull block (918) is rotatably connected to the fourth rotating shaft connecting block (917) via a rotating shaft. A second extension column (919) is snapped into the inside of the third housing (909). A symmetrically arranged extension component (9001) is fixedly connected to the left side of the second extension column (919).

2. The voltmeter with protection function according to claim 1, characterized in that: The extension component (9001) is rotatably connected to the symmetrically arranged extension component (9001) through the limiting pull block (918), the third box (909) is snapped into the extension groove (8), and the extension protection mechanism (9) is symmetrically arranged in four sets on the outer surface of the voltmeter body (1).

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