A hand-held geodetic height measuring instrument

Abstract

The present invention relates to the technical field of measuring instruments, and specifically relates to a handheld geodetic height measuring instrument, which mainly includes: an instrument body, a protection mechanism arranged on the outer side of the instrument body, the protection mechanism includes a protective shell for protecting the four corners of the instrument body, and a buffer mechanism arranged on the outer side of the instrument body. When the instrument falls downward at the corners, the protective shell and the protection plate contact the ground. The protection plate drives the hinge block one and the hinge rod to move, the hinge rod pushes the hinge block two to move, and the hinge block two pushes the elastic member two to contract to shock-absorb and buffer the protection plate. At the same time, the protective shell pushes the T-shaped block to move, and the T-shaped block pushes the elastic member one to contract to shock-absorb and buffer the protective shell. Through the shock absorption and buffering of the protective shell and the protection plate, the instrument body is protected, ensuring that the instrument body is not likely to directly collide violently with the ground when it falls, enabling the instrument body to be buffered, not easily causing damage to the instrument body, improving the service life, and reducing losses.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and particularly to a handheld geodetic height measuring instrument. Background Art

[0002] Geodetic surveying work is to provide a horizontal position control network and an elevation control network on the ground for large-scale topographic mapping, provide gravity control points for underground mineral exploration by gravity prospecting, and also provide accurate coordinates of ground stations and earth gravity field data for launching artificial earth satellites, missiles and various spacecrafts. Among them, height measuring instruments are required during the process of geodetic height measurement.

[0003] The Chinese Patent Network discloses a handheld geodetic height measuring instrument with the publication number CN215810860U. When the staff is at a measurement location with poor signal, the signal enhancement module can increase the signal strength of the device at this time, avoiding the problem of measurement data deviation caused by poor signal, and optimizing the use process.

[0004] However, after long-term use of existing instruments, due to the need for manual long-term holding operations, long-term holding operations not only increase the fatigue of operators, but also easily lead to distraction of attention, thus increasing the risk of accidental dropping of the instrument. Therefore, the instrument may accidentally fall to the ground. Since the protection measures of this instrument are poor, when the instrument falls to the ground, its corners are prone to collide with the ground, and the impact force generated by this collision is extremely likely to cause damage to the instrument, thus bringing losses.

[0005] Therefore, a handheld geodetic height measuring instrument is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a handheld geodetic height measuring instrument to solve the problem of damage to the instrument caused by collision when the instrument falls to the ground and the resulting losses as mentioned in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A handheld geodetic height measuring instrument, comprising: an instrument body, a display screen and keys are installed above the instrument body, a battery is installed inside the front side of the instrument body, and a grip groove is provided on the side of the instrument body;

[0009] A protection mechanism is provided outside the instrument body. The protection mechanism includes a plurality of protective shells provided at the four corners of the instrument body. T-shaped blocks are respectively fixedly installed on the inner walls of the plurality of protective shells, and elastic members I are respectively fixedly installed on the sides of the plurality of T-shaped blocks. The protective shells are used to protect the four corners of the instrument body;

[0010] A buffer mechanism is provided outside the instrument body. The buffer mechanism includes a fixed box disposed on one side of the protective shell. The upper and lower side surfaces of the fixed box are respectively fixedly and penetratingly installed with connecting pipes, and the other ends of the connecting pipes are fixedly installed with air bags, which further protect the instrument body.

[0011] Preferably, a plurality of fixing columns are respectively fixedly installed on the side surfaces of the plurality of protective shells, and a plurality of protective plates are respectively fixedly installed on the outer walls of the plurality of fixing columns. A plurality of T-shaped grooves are respectively formed on the upper and lower side surfaces of the instrument body, and the outer walls of a plurality of T-shaped blocks are respectively slidably connected to the inner walls of the plurality of T-shaped grooves. The other ends of the plurality of elastic members 1 are respectively fixedly connected to the inner walls of the plurality of T-shaped grooves.

[0012] Preferably, two hinge blocks 1 are respectively fixedly installed on the inner walls of the plurality of protective plates, and two hinge rods are respectively hinged to the inner walls of the plurality of hinge blocks 1. The other ends of the plurality of hinge rods are respectively hinged to hinge blocks 2.

[0013] Preferably, a plurality of arc-shaped grooves are respectively formed on the outer wall of the instrument body, and the outer walls of the plurality of hinge blocks 2 are respectively slidably connected to the inner walls of the plurality of arc-shaped grooves. Two arc-shaped rods are respectively slidably penetrated through the side surfaces of the plurality of hinge blocks 2, and both ends of the plurality of arc-shaped rods are respectively fixedly connected to the inner walls of the plurality of arc-shaped grooves.

[0014] Preferably, elastic members 2 are respectively slidably installed on the outer walls of the plurality of arc-shaped rods, and both ends of the plurality of elastic members 2 are respectively fixedly connected to the side surfaces of the plurality of hinge blocks 2 and the inner walls of the plurality of arc-shaped grooves.

[0015] Preferably, a plurality of connecting plates are respectively fixedly installed on the side surfaces of the plurality of hinge blocks 1 close to each other, and connecting columns are respectively fixedly installed on the side surfaces of the plurality of connecting plates. A plurality of fixed boxes are provided, and the other ends of the plurality of connecting columns are respectively fixedly connected to the side surfaces of the plurality of fixed boxes. Piston plates are respectively slidably connected to the inner walls of the plurality of fixed boxes.

[0016] Preferably, a plurality of movable columns are respectively fixedly installed on the side surfaces of the plurality of piston plates, and the other ends of the plurality of movable columns respectively slide through the inner walls of the plurality of fixed boxes and extend to the outside of the fixed boxes. Arc-shaped plates are respectively fixedly installed at one ends of the plurality of movable columns, and the inner walls of the plurality of arc-shaped plates are in movable contact with the outer wall of the instrument body.

[0017] Preferably, grooves are respectively formed on the side surfaces of the plurality of protective shells, and the inner walls of the plurality of grooves are respectively fixedly connected to the outer walls of the plurality of air bags. The plurality of connecting pipes are respectively fixedly penetrated through the side surfaces of the plurality of protective shells, and the outer walls of the plurality of arc-shaped plates are respectively fixedly connected to the outer walls of the plurality of fixed boxes through a plurality of elastic members 3.

[0018] Preferably, a plurality of fixing frames are fixedly installed on the other side surfaces of the plurality of fixing boxes respectively. A plurality of cogs are respectively rotatably installed on the inner walls of the plurality of fixing frames through movable shafts. Two L-shaped rods are respectively fixedly installed on the outer walls of the plurality of arc-shaped plates. A wedge-shaped block is fixedly installed on the top surface of one end of each of the plurality of L-shaped rods. The plurality of wedge-shaped blocks are respectively clamped with the plurality of cogs.

[0019] Preferably, a fourth elastic member is fixedly installed on the top surface of each of the plurality of cogs respectively. The other ends of the plurality of fourth elastic members are respectively fixedly connected to the inner walls of the upper ends of the plurality of fixing frames. An adjusting rod is fixedly installed on the side surface of each of the plurality of cogs respectively. A rubber sleeve is fixedly installed on the outer wall of one end of each of the plurality of adjusting rods. An adjusting groove is respectively formed through the side surface of each of the plurality of fixing frames. The inner walls of the plurality of adjusting grooves are respectively slidably connected to the outer walls of the plurality of adjusting rods.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] When the instrument drops from the corner, the protective shell and the protective plate contact the ground. The protective plate drives the first hinge block and the hinge rod to move. The hinge rod pushes the second hinge block to move. The second hinge block pushes the second elastic member to contract to cushion and buffer the protective plate. At the same time, the protective shell drives the T-shaped block to move. The T-shaped block pushes the first elastic member to contract to cushion and buffer the protective shell. Through the cushioning and buffering of the protective shell and the protective plate, the instrument body is protected, ensuring that the instrument body is not likely to directly collide violently with the ground when it drops, enabling the instrument body to be cushioned and not easily damaged, improving the service life and reducing losses.

[0022] When the protective plate contacts and squeezes the ground and moves, the protective plate drives the connecting plate and the connecting column to move through the first hinge block. The connecting column drives the fixing box to move. The fixing box moves while squeezing the third elastic member, and the fixing box approaches the arc-shaped plate. The arc-shaped plate moves the piston plate in the inner wall of the fixing box through the movable column, and pushes the gas inside the fixing box to the airbag through the connecting pipe. The airbag expands and protrudes from the surface of the protective shell. Moreover, the arc-shaped plate drives the wedge-shaped block to move through the L-shaped rod. The wedge-shaped block moves a certain distance and is clamped with the cog and will not rebound, ensuring that when the protective plate rebounds, the position of the piston plate in the fixing box remains unchanged, thereby ensuring that the gas in the airbag is not easily refluxed into the fixing box, making the airbag always in an inflated state. When the instrument body falls and lies down, the airbag cushions and buffers the upper and lower sides of the instrument body, and ensures that the display screen and buttons on the instrument body are not easily in contact with the ground and collide, further ensuring that the instrument body is not easily damaged and improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a bottom three-dimensional structural schematic diagram of the present invention;

[0025] Figure 3 is the exploded view of the three-dimensional structure of the present invention;

[0026] Figure 4 is the schematic cross-sectional view of the partial three-dimensional structure of the present invention;

[0027] Figure 5 is the Figure 4 enlarged view at position A in the present invention;

[0028] Figure 6 is the schematic cross-sectional view of the three-dimensional structure of the present invention;

[0029] Figure 7 is the Figure 6 enlarged view at position B in the present invention;

[0030] Figure 8 is the exploded view of the partial three-dimensional structure of the present invention;

[0031] Figure 9 is the exploded view of the three-dimensional structure at the fixing frame of the present invention;

[0032] Figure 10 is the Figure 8 enlarged view at position C in the present invention;

[0033] Figure 11 is the schematic cross-sectional view of the three-dimensional structure of the fixing box of the present invention.

[0034] In the figure:

[0035] 1. Instrument body; 101. Display screen; 102. Button; 103. Battery; 104. Grip groove;

[0036] 2. Protection mechanism; 201. Protection shell; 202. Fixed column; 203. Protection plate; 204. T-shaped block; 205. T-shaped groove; 206. Elastic member 1; 207. Hinge block 1; 208. Hinge rod; 209. Hinge block 2; 210. Arc groove; 211. Arc rod; 212. Elastic member 2;

[0037] 3. Buffer mechanism; 301. Connecting plate; 302. Connecting column; 303. Fixed box; 304. Piston plate; 305. Movable column; 306. Arc plate; 307. Connecting pipe; 308. Groove body; 309. Airbag; 310. Elastic member 3; 311. L-shaped rod; 312. Fixed frame; 313. Tooth; 314. Elastic member 4; 315. Wedge block; 316. Adjusting rod; 317. Adjusting groove; 318. Rubber sleeve. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present application in detail with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] As Figure 1-11 shown, the present application provides a hand-held geodetic height measuring instrument, including: an instrument body 1, a display screen 101 and a key 102 are installed above the instrument body 1, a battery 103 is installed inside the front side of the instrument body 1, and a grip groove 104 is provided on the side of the instrument body 1;

[0041] A protection mechanism 2 is arranged outside the instrument body 1. The protection mechanism 2 includes a plurality of protective shells 201 provided at the four corners of the instrument body 1. T-shaped blocks 204 are respectively fixedly installed on the inner walls of the plurality of protective shells 201, and a first elastic member 206 is respectively fixedly installed on the sides of the plurality of T-shaped blocks 204. The protective shells 201 are used to protect the four corners of the instrument body 1;

[0042] Specifically, as Figure 1-8 shown, a plurality of fixing columns 202 are respectively fixedly installed on the sides of the plurality of protective shells 201 close to the sides, protective plates 203 are respectively fixedly installed on the outer walls of the plurality of fixing columns 202, a plurality of T-shaped grooves 205 are respectively provided on the upper and lower sides of the instrument body 1, the outer walls of the plurality of T-shaped blocks 204 are respectively slidably connected to the inner walls of the plurality of T-shaped grooves 205, and the other ends of the plurality of first elastic members 206 are respectively fixedly connected to the inner walls of the plurality of T-shaped grooves 205.

[0043] In this embodiment: through the arrangement of the protective shell 201 and the protective plate 203, when the instrument body 1 falls, it is ensured that the corners of the instrument body 1 are not easily in contact with the ground and collide, ensuring that the instrument body 1 is not easily damaged, and the protective shell 201 is buffered by the first elastic member 206 through the T-shaped block 204, further ensuring that the instrument body 1 is buffered and not easily damaged.

[0044] Specifically, as Figure 1-8 shown, two hinge blocks one 207 are respectively fixedly installed on the inner walls of the plurality of protective plates 203, two hinge rods 208 are respectively hinged on the inner walls of the plurality of hinge blocks one 207, and the other ends of the plurality of hinge rods 208 are respectively hinged to hinge blocks two 209.

[0045] In this embodiment: By contacting the ground with the protective plate 203, the protective plate 203 drives the hinge rod 208 to move through the first hinge block 207, and the hinge rod 208 drives the second hinge block 209 to move. The instrument body 1 is further protected by the protective plate 203 to prevent damage and improve the service life.

[0046] Specifically, as Figure 1-8 shown, a plurality of arc-shaped grooves 210 are respectively formed on the outer wall of the instrument body 1, the inner walls of the plurality of arc-shaped grooves 210 are respectively slidably connected to the outer walls of the plurality of second hinge blocks 209, and two arc-shaped rods 211 are respectively slidably penetrated and installed on the sides of the plurality of second hinge blocks 209. Both ends of the plurality of arc-shaped rods 211 are respectively fixedly connected to the inner walls of the plurality of arc-shaped grooves 210.

[0047] In this embodiment: The second hinge block 209 is limited by the provided arc-shaped groove 210 and arc-shaped rod 211 to ensure that the second hinge block 209 moves more smoothly, is not easily offset, and improves the stability and practicability of the device.

[0048] Specifically, as Figure 1-8 shown, a plurality of second elastic members 212 are respectively slidably installed on the outer walls of the plurality of arc-shaped rods 211, and both ends of the plurality of second elastic members 212 are respectively fixedly connected to the sides of the plurality of second hinge blocks 209 and the inner walls of the plurality of arc-shaped grooves 210.

[0049] In this embodiment: When the second hinge block 209 moves, it pushes the second elastic member 212 to contract, and the second elastic member 212 cushions and buffers the second hinge block 209, thereby further cushioning and buffering the protective plate 203. When the protective plate 203 collides, the impact force received by the instrument body 1 is reduced, further ensuring that the instrument body 1 is not easily damaged and improving the service life.

[0050] The buffer mechanism 3 is arranged outside the instrument body 1. The buffer mechanism 3 includes a fixed box 303 arranged on one side of the protective shell 201. Connecting pipes 307 are respectively fixedly penetrated and installed on the upper and lower sides of the fixed box 303, and an airbag 309 is fixedly installed at the other end of the connecting pipe 307. The airbag 309 further protects the instrument body 1.

[0051] Specifically, as Figure 1-11 shown, a plurality of connecting plates 301 are respectively fixedly installed on the sides of the plurality of first hinge blocks 207 close to each other, a plurality of connecting columns 302 are respectively fixedly installed on the sides of the plurality of connecting plates 301, a plurality of fixed boxes 303 are provided, and the other ends of the plurality of connecting columns 302 are respectively fixedly connected to the sides of the plurality of fixed boxes 303. Piston plates 304 are respectively slidably connected to the inner walls of the plurality of fixed boxes 303.

[0052] In this embodiment: The protective plate 203 drives the first hinge block 207 and the connecting plate 301 to move. The connecting plate 301 drives the connecting column 302 and the fixed box 303 to move, and the fixed box 303 contains shock-absorbing gas inside.

[0053] Specifically, as Figure 1-11 shown, a plurality of movable columns 305 are respectively fixedly installed on the sides of a plurality of piston plates 304. The other ends of the plurality of movable columns 305 respectively slide through the inner walls of the plurality of fixed boxes 303 and extend to the outside of the fixed boxes 303. One ends of the plurality of movable columns 305 are respectively fixedly installed with arc-shaped plates 306, and the inner walls of the plurality of arc-shaped plates 306 are in movable contact with the outer wall of the instrument body 1.

[0054] In this embodiment: When the fixed box 303 moves, since the arc-shaped plate 306 contacts the instrument body 1, the arc-shaped plate 306 drives the piston plate 304 to move relative to the inner wall of the fixed box 303 through the movable column 305. The piston plate 304 pushes the gas inside the fixed box 303 into the airbag 309 through the connecting pipe 307. The airbag 309 expands to perform shock absorption and buffering on the upper and lower sides of the instrument body 1, ensuring that the instrument body 1 is not easily damaged.

[0055] Specifically, as Figure 1-11 shown, a plurality of grooves 308 are respectively opened on the sides of the plurality of protective shells 201. The inner walls of the plurality of grooves 308 are respectively fixedly connected to the outer walls of the plurality of airbags 309. The plurality of connecting pipes 307 are respectively fixedly penetrated through the sides of the plurality of protective shells 201. The outer walls of the plurality of arc-shaped plates 306 are respectively fixedly connected to the outer walls of the plurality of fixed boxes 303 through a plurality of third elastic members 310.

[0056] In this embodiment: Through the arrangement of the groove 308, when the instrument body 1 is in use and has not fallen, the airbag 309 contracts inside the groove 308, and the airbag 309 will not protrude from the groove 308, and thus will not affect the staff's holding and observation of the instrument body 1.

[0057] Specifically, as Figure 1-11 shown, a plurality of fixing frames 312 are respectively fixedly installed on the other sides of the plurality of fixed boxes 303. A plurality of engaging teeth 313 are respectively rotatably installed on the inner walls of the plurality of fixing frames 312 through movable shafts. Two L-shaped rods 311 are respectively fixedly installed on the outer walls of the plurality of arc-shaped plates 306. A wedge-shaped block 315 is respectively fixedly installed on the top surface of one end of the plurality of L-shaped rods 311. The plurality of wedge-shaped blocks 315 are respectively engaged with the plurality of engaging teeth 313.

[0058] In this embodiment, when the distance between the fixed box 303 and the arc-shaped plate 306 is close, the arc-shaped plate 306 drives the L-shaped rod 311 and the wedge-shaped block 315 to move. The position of the wedge-shaped block 315 moves relative to the tooth 313 and is engaged therewith. When the fixed box 303 moves back to its original position, it is ensured that the position of the arc-shaped plate 306 and the fixed box 303 does not rebound, so as to ensure that the position of the piston plate 304 inside the fixed box 303 does not change, so that the fixed box 303 does not suck air from the inside of the airbag 309 through the connecting pipe 307, ensuring that the airbag 309 is in an inflated state to provide good protection for the instrument body 1.

[0059] Specifically, as Figure 1-11 shown, elastic members four 314 are fixedly installed on the top surfaces of the plurality of teeth 313 respectively, the other ends of the plurality of elastic members four 314 are fixedly connected to the inner walls of the upper ends of the plurality of fixed frames 312 respectively, adjusting rods 316 are fixedly installed on the side surfaces of the plurality of teeth 313 respectively, rubber sleeves 318 are fixedly installed on the outer walls of one ends of the plurality of adjusting rods 316 respectively, adjusting grooves 317 are respectively formed through the side surfaces of the plurality of fixed frames 312, and the inner walls of the plurality of adjusting grooves 317 are respectively slidably connected to the outer walls of the plurality of adjusting rods 316.

[0060] In this embodiment, by adjusting the adjusting rod 316, the tooth 313 is driven to rotate and the elastic member four 314 is squeezed and contracted. When the tooth 313 rotates, the tooth 313 is no longer fixedly connected to the wedge-shaped block 315. At this time, the elastic member three 310 pushes the arc-shaped plate 306 to drive the piston plate 304 to return to its original position, so that the fixed box 303 absorbs the gas inside the airbag 309 through the connecting pipe 307, and the airbag 309 contracts into the groove body 308 to ensure the normal protection function of the instrument next time.

[0061] The specific solution of this scheme is as follows: When the instrument falls downward at the corners, the protective shell 201 and the protective plate 203 come into contact with the ground. The protective plate 203 drives the first hinge block 207 and the hinge rod 208 to move. The hinge rod 208 pushes the second hinge block 209 to move. The second hinge block 209 pushes the second elastic member 212 to contract to cushion and buffer the protective plate 203. At the same time, the protective shell 201 drives the T-shaped block 204 to move. The T-shaped block 204 pushes the first elastic member 206 to contract to cushion and buffer the protective shell 201. Through the shock absorption and buffering of the protective shell 201 and the protective plate 203, the instrument body 1 is protected, ensuring that the instrument body 1 is not likely to directly collide violently with the ground when it falls, enabling the instrument body 1 to be buffered and not easily damaged, improving the service life and reducing losses. When the protective plate 203 is in contact with the ground and is extruded and moves, the protective plate 203 drives the connecting plate 301 and the connecting column 302 to move through the first hinge block 207. The connecting column 302 drives the fixed box 303 to move. The fixed box 303 moves while squeezing the third elastic member 310, and the fixed box 303 approaches the arc plate 306. The arc plate 306 moves the piston plate 304 on the inner wall of the fixed box 303 through the movable column 305, and pushes the gas inside the fixed box 303 to be pushed into the airbag 309 through the connecting pipe 307. The airbag 309 expands and protrudes from the surface of the protective shell 201. Moreover, the arc plate 306 drives the wedge block 315 to move through the L-shaped rod 311. The wedge block 315 moves a certain distance and is engaged with the tooth 313 and will not rebound, ensuring that when the protective plate 203 rebounds, the position of the piston plate 304 in the fixed box 303 remains unchanged, thereby ensuring that the gas in the airbag 309 is not easily refluxed into the fixed box 303, making the airbag 309 always in an expanded state. When the instrument body 1 falls and lies down, the airbag 309 cushions and buffers the upper and lower sides of the instrument body 1, and ensures that the display screen 101 and the keys 102 on the instrument body 1 are not easily in contact with the ground and collide, further ensuring that the instrument body 1 is not easily damaged and improving the service life.

[0062] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0063] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hand-held geodetic height measuring instrument, comprising: The instrument body (1), above which a display screen (101) and buttons (102) are installed, inside the front side of the instrument body (1) a battery (103) is installed, and a grip groove (104) is provided on the side of the instrument body (1). It is characterized in that, A protection mechanism (2) is provided on the outer side of the instrument body (1). The protection mechanism (2) includes a plurality of protective shells (201) arranged at the four corners of the instrument body (1). T-shaped blocks (204) are respectively and fixedly installed on the inner walls of the plurality of protective shells (201). Elastic members I (206) are respectively and fixedly installed on the sides of the plurality of T-shaped blocks (204). A plurality of fixing columns (202) are respectively and fixedly installed on the sides of the plurality of protective shells (201) close to the sides. Protective plates (203) are respectively and fixedly installed on the outer walls of the plurality of fixing columns (202). A plurality of T-shaped grooves (205) are respectively provided on the upper and lower sides of the instrument body (1). The outer walls of the plurality of T-shaped blocks (204) are respectively slidably connected to the inner walls of the plurality of T-shaped grooves (205). The other ends of the plurality of elastic members I (206) are respectively fixedly connected to the inner walls of the plurality of T-shaped grooves (205). The protective shells (201) are used to protect the four corners of the instrument body (1); A buffering mechanism (3) is provided on the outer side of the instrument body (1). The buffering mechanism (3) includes a fixed box (303) arranged on one side of the protective shell (201). Connecting pipes (307) are respectively and fixedly installed through the upper and lower sides of the fixed box (303). Air bags (309) are fixedly installed at the other ends of the connecting pipes (307). Piston plates (304) are respectively slidably connected to the inner walls of the plurality of fixed boxes (303). A plurality of movable columns (305) are respectively and fixedly installed on the sides of the plurality of piston plates (304). Arc-shaped plates (306) are respectively and fixedly installed at one ends of the plurality of movable columns (305). The other ends of the plurality of movable columns (305) respectively slide through the inner walls of the plurality of fixed boxes (303) and extend to the outside of the fixed boxes (303). The inner walls of the plurality of arc-shaped plates (306) are in movable contact with the outer wall of the instrument body (1). Grooves (308) are respectively provided on the sides of the plurality of protective shells (201). The outer walls of the plurality of air bags (309) are respectively fixedly connected to the inner walls of the plurality of grooves (308). The plurality of connecting pipes (307) are respectively fixedly installed through the sides of the plurality of protective shells (201). The outer walls of the plurality of arc-shaped plates (306) are respectively fixedly connected to the outer walls of the plurality of fixed boxes (303) through a plurality of elastic members III (310). The air bags (309) further protect the instrument body (1).

2. The hand-held geodetic height measuring instrument according to claim 1, characterized in that, Two hinge blocks I (207) are respectively and fixedly installed on the inner walls of the plurality of protective plates (203). Two hinge rods (208) are respectively hinged to the inner walls of the plurality of hinge blocks I (207). Hinge blocks II (209) are respectively hinged to the other ends of the plurality of hinge rods (208).

3. The hand-held geodetic height measuring instrument according to claim 2, characterized in that, The outer wall of the instrument body (1) is respectively provided with a plurality of arc-shaped grooves (210). The inner walls of the plurality of arc-shaped grooves (210) are respectively slidably connected to the outer walls of a plurality of second hinge blocks (209). Two arc-shaped rods (211) are respectively slidably penetrated and installed on the sides of the plurality of second hinge blocks (209). Both ends of the plurality of arc-shaped rods (211) are respectively fixedly connected to the inner walls of the plurality of arc-shaped grooves (210).

4. The hand-held geodetic height measuring instrument according to claim 3, characterized in that, A plurality of second elastic members (212) are respectively slidably installed on the outer walls of the plurality of arc-shaped rods (211). Both ends of the plurality of second elastic members (212) are respectively fixedly connected to the sides of the plurality of second hinge blocks (209) and the inner walls of the plurality of arc-shaped grooves (210).

5. A hand-held geodetic height measuring instrument according to claim 2, characterized in that, A plurality of connecting plates (301) are respectively fixedly installed on the sides of the plurality of first hinge blocks (207) close to the sides. A plurality of connecting columns (302) are respectively fixedly installed on the sides of the plurality of connecting plates (301). A plurality of fixed boxes (303) are provided. The other ends of the plurality of connecting columns (302) are respectively fixedly connected to the sides of the plurality of fixed boxes (303).

6. The hand-held geodetic height measuring instrument according to claim 5, characterized in that, A plurality of fixed frames (312) are respectively fixedly installed on the other sides of the plurality of fixed boxes (303). A plurality of locking teeth (313) are respectively rotatably installed on the inner walls of the plurality of fixed frames (312) through movable shafts. Two L-shaped rods (311) are respectively fixedly installed on the outer walls of the plurality of arc-shaped plates (306). A wedge-shaped block (315) is respectively fixedly installed on the top surface of one end of the plurality of L-shaped rods (311). The plurality of wedge-shaped blocks (315) are respectively engaged with the plurality of locking teeth (313).

7. A hand-held geodetic height measuring instrument according to claim 6, characterized in that, A plurality of fourth elastic members (314) are respectively fixedly installed on the top surfaces of the plurality of locking teeth (313). The other ends of the plurality of fourth elastic members (314) are respectively fixedly connected to the upper inner walls of the plurality of fixed frames (312). A plurality of adjusting rods (316) are respectively fixedly installed on the sides of the plurality of locking teeth (313). A rubber sleeve (318) is respectively fixedly installed on the outer wall of one end of the plurality of adjusting rods (316). A plurality of adjusting grooves (317) are respectively penetrated and opened on the sides of the plurality of fixed frames (312). The inner walls of the plurality of adjusting grooves (317) are respectively slidably connected to the outer walls of the plurality of adjusting rods (316).

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