Handheld geodetic height measuring instrument

Abstract

The invention relates to the technical field of measuring instruments, in particular to a handheld geodetic height measuring instrument which mainly comprises an instrument body, a protection mechanism arranged on the outer side of the instrument body, and a buffer mechanism arranged on the outer side of the instrument body, the protection mechanism comprises a protection shell used for protecting the four corners of the instrument body. The protective shell and the protective plate are in contact with the ground when the instrument falls down at the corner, the protective plate drives a first hinge block and a hinge rod to move, the hinge rod pushes a second hinge block to move, the second hinge block pushes a second elastic piece to contract to conduct damping and buffering on the protective plate, and meanwhile the protective shell pushes a T-shaped block to move; the T-shaped block pushes the first elastic piece to contract to conduct damping and buffering on the protective shell, the instrument body is protected through damping and buffering of the protective shell and the protective plate, it is guaranteed that the instrument body is not prone to directly and violently colliding with the ground when falling off, the instrument body is buffered, the instrument body is not prone to being damaged, and the service life is prolonged; the loss is reduced.

Description

Technical Field

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

[0002] Geodetic surveying is the process of providing horizontal position control networks and elevation control networks for large-scale topographic mapping, gravity control points for gravity exploration of underground mineral deposits, and precise coordinates of ground stations and earth gravity field data for launching artificial satellites, missiles and various spacecraft. Among them, altitude measuring instruments are needed in the process of geodetic height measurement.

[0003] China Patent Network has published a publication number CN215810860U, which discloses a handheld geodetic height measuring instrument. When the staff is at a measurement location with poor signal, the signal enhancement module can increase the signal strength of the device, thereby avoiding the problem of measurement data deviation due to poor signal and optimizing the use process.

[0004] However, after long-term use, the existing instruments require long-term manual hand-held operation, which not only increases the fatigue of the operators, but also easily leads to distraction, thereby increasing the risk of accidental falling of the instrument. Therefore, the instrument may accidentally fall to the ground. Since the protection measures of the 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 can easily cause damage to the instrument, thereby causing losses.

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

[0006] The object of the present invention is to provide a handheld geodetic height measuring instrument to solve the problem that the instrument mentioned in the background art falls to the ground and collides, causing damage to the instrument and resulting in losses.

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

[0008] A handheld geodetic height measuring instrument comprises: an instrument body, a display screen and buttons are installed on the top of the instrument body, a battery is installed inside the front side of the instrument body, and a grip groove is opened on the side of the instrument body;

[0009] A protective mechanism is arranged outside the instrument body, the protective mechanism includes a plurality of protective shells arranged at the four corners of the instrument body, the inner walls of the plurality of protective shells are respectively fixedly mounted with T-shaped blocks, the sides of the plurality of T-shaped blocks are respectively fixedly mounted with elastic members 1, and the protective shells are used to protect the four corners of the instrument body;

[0010] The buffer mechanism is arranged on the outside of the instrument body. The buffer mechanism includes a fixed box arranged on one side of the protective shell. Connecting pipes are fixedly installed on the upper and lower sides of the fixed box respectively. An airbag is fixedly installed on the other end of the connecting pipe. The airbag further protects the instrument body.

[0011] Preferably, multiple fixing columns are fixedly installed near the sides of the multiple protective shells, and protective plates are fixedly installed on the outer walls of the multiple fixing columns. Multiple T-slots are respectively opened on the upper and lower sides of the instrument body, and the outer walls of the multiple T-blocks are respectively slidably connected to the inner walls of the multiple T-slots, and the other ends of the multiple elastic members are respectively fixedly connected to the inner walls of the multiple T-slots.

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

[0013] Preferably, the outer wall of the instrument body is respectively provided with a plurality of arc grooves, the inner walls of the plurality of arc grooves are respectively slidably connected to the two outer walls of the plurality of hinge blocks, the two side surfaces of the plurality of hinge blocks are respectively slidably penetrated by two arc rods, and the two ends of the plurality of arc rods are respectively fixedly connected to the inner walls of the plurality of arc grooves.

[0014] Preferably, the outer walls of the plurality of arc-shaped rods are respectively slidably mounted with elastic members 2, and the two 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 fixedly installed near the sides of the plurality of hinge blocks, a plurality of connecting columns are fixedly installed on the sides of the plurality of connecting plates, a plurality of fixed boxes are provided, the other ends of the plurality of connecting columns are fixedly connected to the sides of the plurality of fixed boxes, and a plurality of inner walls of the plurality of fixed boxes are slidably connected to piston plates.

[0016] Preferably, multiple movable columns are respectively fixedly installed on the sides of the multiple piston plates, and the other ends of the multiple movable columns slide through the inner walls of the multiple fixed boxes and extend to the outside of the fixed boxes. Arc plates are respectively fixedly installed on one ends of the multiple movable columns, and the inner walls of the multiple arc plates are in movably contact with the outer wall of the instrument body.

[0017] Preferably, multiple sides of the protective shells are respectively provided with grooves, multiple inner walls of the grooves are respectively fixedly connected to multiple outer walls of the airbags, multiple connecting pipes are respectively fixedly passed through multiple sides of the protective shells, and multiple outer walls of the arc plates are respectively fixedly connected to multiple outer walls of the fixed boxes through multiple elastic parts.

[0018] Preferably, multiple fixing frames are fixedly installed on the other side of the multiple fixing boxes, multiple fixing frames have inner walls rotatably installed with latching teeth through movable shafts, multiple arc-shaped plate outer walls have two L-shaped rods fixedly installed, multiple L-shaped rods have top surfaces at one end fixedly installed with wedge blocks, and multiple wedge blocks are respectively engaged with multiple latching teeth.

[0019] Preferably, multiple top surfaces of the latch teeth are respectively fixedly mounted with elastic parts four, the other ends of multiple elastic parts four are respectively fixedly connected to the inner walls of the upper ends of multiple fixed frames, multiple side surfaces of the latch teeth are respectively fixedly mounted with adjustment rods, multiple outer walls of one ends of the adjustment rods are respectively fixedly mounted with rubber sleeves, multiple side surfaces of the fixed frames are respectively provided with adjustment grooves, and the inner walls of the multiple adjustment grooves are respectively slidably connected to the outer walls of multiple adjustment rods.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The invention allows the protective shell and the protective plate to contact the ground when the corner of the instrument falls downward, and the protective plate drives the hinge block 1 and the hinge rod to move, the hinge rod drives the hinge block 2 to move, the hinge block 2 drives the elastic member 2 to contract to reduce shock and buffer the protective plate, and at the same time, the protective shell drives the T-shaped block to move, and the T-shaped block drives the elastic member 1 to contract to reduce shock and buffer the protective shell. The protective shell and the protective plate are subjected to shock and buffering, and then the instrument body is protected, ensuring that the instrument body is not likely to directly collide violently with the ground when it falls, so that the instrument body is buffered and is not likely to be damaged, thereby increasing the service life and reducing losses.

[0022] When the protective plate contacts and squeezes and moves with the ground, the protective plate drives the connecting plate and the connecting column to move through the hinge block 1, and the connecting column drives the fixed box to move. The movement of the fixed box squeezes the elastic member 3 at the same time, and the fixed box approaches the arc plate, and the arc plate moves the piston plate on the inner wall of the fixed box through the movable column, and pushes the gas inside the fixed box into the airbag through the connecting pipe. The airbag expands and protrudes out of the surface of the protective shell, and the arc plate drives the wedge block to move through the L-shaped rod. The wedge block moves a certain distance and engages with the latch tooth without rebounding, ensuring that the position of the piston plate in the fixed box remains unchanged when the protective plate rebounds, thereby ensuring that the gas in the airbag is not easy to flow back to the fixed box, so that the airbag is always in an expanded state. When the instrument body falls down after falling, the airbag performs shock absorption and buffering on the upper and lower sides of the instrument body, and ensures that the display screen and buttons on the instrument body are not easy to contact and collide with the ground, further ensuring that the instrument body is not easily damaged and the service life is increased. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic bottom view of the three-dimensional structure of the present invention;

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

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

[0027] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

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

[0029] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0030] Figure 8 It is a partial three-dimensional structure explosion diagram of the present invention;

[0031] Fig. 9 It is an exploded view of the three-dimensional structure of the fixing frame of the present invention;

[0032] Fig.10 For the present invention Figure 8 Enlarged view of point C in the middle;

[0033] Fig.11 It is a 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. Buttons; 103. Battery; 104. Grip;

[0036] 2. Protective mechanism; 201. Protective shell; 202. Fixed column; 203. Protective plate; 204. T-shaped block; 205. T-shaped slot; 206. Elastic member 1; 207. Articulated block 1; 208. Articulated rod; 209. Articulated 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. Slot body; 309. Airbag; 310. Elastic part three; 311. L-shaped rod; 312. Fixed frame; 313. Clamping tooth; 314. Elastic part four; 315. Wedge block; 316. Adjusting rod; 317. Adjusting slot; 318. Rubber sleeve. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below 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 technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] like Figure 1-11 As shown, the present application provides a handheld geodetic height measuring instrument, comprising: an instrument body 1, a display screen 101 and a button 102 are installed on the top of the instrument body 1, a battery 103 is installed inside the front side of the instrument body 1, and a grip groove 104 is opened on the side of the instrument body 1;

[0041] The protection mechanism 2 is arranged outside the instrument body 1. The protection mechanism 2 includes a plurality of protection shells 201 arranged at the four corners of the instrument body 1. The inner walls of the plurality of protection shells 201 are respectively fixedly mounted with T-shaped blocks 204. The sides of the plurality of T-shaped blocks 204 are respectively fixedly mounted with elastic members 206. The protection shells 201 are used to protect the four corners of the instrument body 1.

[0042] Specifically, Figure 1-8 As shown, multiple protective shells 201 are fixedly installed with multiple fixing columns 202 near the sides, and protective plates 203 are fixedly installed on the outer walls of the multiple fixing columns 202. Multiple T-slots 205 are respectively opened on the upper and lower sides of the instrument body 1. The outer walls of multiple T-blocks 204 are respectively slidably connected to the inner walls of the multiple T-slots 205, and the other ends of multiple elastic members 206 are respectively fixedly connected to the inner walls of the multiple T-slots 205.

[0043] In this embodiment: by setting 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 easy to contact and collide with the ground, and the instrument body 1 is not easy to be damaged. The protective shell 201 is buffered by the elastic member 206 through the T-shaped block 204, which further ensures that the instrument body 1 is buffered and not easy to be damaged.

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

[0045] In this embodiment: the protective plate 203 contacts the ground, the protective plate 203 drives the hinge rod 208 to move through the hinge block 1 207, and the hinge rod 208 drives the hinge block 209 to move. The protective plate 203 further protects the instrument body 1 to prevent damage and increase its service life.

[0046] Specifically, Figure 1-8 As shown, the outer wall of the instrument body 1 is respectively provided with a plurality of arc grooves 210, the inner walls of the plurality of arc grooves 210 are respectively slidably connected to the outer walls of the plurality of hinge blocks 209, and the sides of the plurality of hinge blocks 209 are respectively slidably penetrated by two arc rods 211, and the two ends of the plurality of arc rods 211 are respectively fixedly connected to the inner walls of the plurality of arc grooves 210.

[0047] In this embodiment, the second hinge block 209 is limited by the arc groove 210 and the arc rod 211, so as to ensure that the second hinge block 209 moves more smoothly and is not easily offset, thereby improving the stability and practicality of the device.

[0048] Specifically, Figure 1-8 As shown, the outer walls of the plurality of arc-shaped rods 211 are slidably mounted with elastic members 212 , and the two ends of the plurality of elastic members 212 are fixedly connected to the side surfaces of the plurality of hinge blocks 209 and the inner walls of the plurality of arc-shaped grooves 210 .

[0049] In this embodiment: the hinge block 209 is moved to push the elastic member 212 to contract, and the elastic member 212 performs shock-absorbing and buffering on the hinge block 209, thereby further performing shock-absorbing and buffering on the protective plate 203, ensuring that when the protective plate 203 collides, the impact force on the instrument body 1 is reduced, further ensuring that the instrument body 1 is not easily damaged and increasing its service life.

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

[0051] Specifically, Figure 1-11 As shown, multiple hinge blocks 207 are fixedly installed with multiple connecting plates 301 near the sides, and connecting columns 302 are fixedly installed on the sides of the multiple connecting plates 301. Multiple fixed boxes 303 are provided, and the other ends of the multiple connecting columns 302 are fixedly connected to the sides of the multiple fixed boxes 303, and the inner walls of the multiple fixed boxes 303 are slidably connected with piston plates 304.

[0052] In this embodiment: the hinge block 207 and the connecting plate 301 are driven to move by the protective plate 203, and the connecting plate 301 drives the connecting column 302 and the fixing box 303 to move, and the fixing box 303 contains shock-absorbing gas.

[0053] Specifically, Figure 1-11 As shown, multiple movable columns 305 are fixedly installed on the sides of the multiple piston plates 304, and the other ends of the multiple movable columns 305 slide through the inner walls of the multiple fixed boxes 303 and extend to the outside of the fixed boxes 303. Arc plates 306 are fixedly installed on one end of the multiple movable columns 305, and the inner walls of the multiple arc plates 306 are in active contact with the outer wall of the instrument body 1.

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

[0055] Specifically, Figure 1-11 As shown, grooves 308 are respectively opened on the sides of the multiple protective shells 201, the inner walls of the multiple grooves 308 are respectively fixedly connected to the outer walls of the multiple airbags 309, multiple connecting tubes 307 are respectively fixed and penetrate the sides of the multiple protective shells 201, and the outer walls of the multiple arc plates 306 are respectively fixedly connected to the outer walls of the multiple fixing boxes 303 through multiple elastic parts 310.

[0056] In this embodiment: through the setting of the groove body 308, when the instrument body 1 is in use and not dropped, the airbag 309 shrinks inside the groove body 308, and the airbag 309 does not protrude from the groove body 308, thereby not affecting the staff's holding and observation of the instrument body 1.

[0057] Specifically, Figure 1-11 As shown, multiple fixed frames 312 are fixedly installed on the other side of the multiple fixed boxes 303, and the inner walls of the multiple fixed frames 312 are respectively rotatably installed with latch teeth 313 through movable shafts. Two L-shaped rods 311 are fixedly installed on the outer walls of the multiple arc plates 306, and wedge blocks 315 are fixedly installed on the top surfaces of one ends of the multiple L-shaped rods 311, and the multiple wedge blocks 315 are respectively engaged with the multiple latch teeth 313.

[0058] In this embodiment: when the fixed box 303 and the arc plate 306 are close to each other, the arc plate 306 drives the L-shaped rod 311 and the wedge block 315 to move, and the wedge block 315 and the latching tooth 313 are relatively moved and latched. When the fixed box 303 moves back to its original position, the position of the arc plate 306 and the fixed box 303 is ensured not to rebound, thereby ensuring that the position of the piston plate 304 inside the fixed box 303 does not change, so that the fixed box 303 will not inhale air from the inside of the airbag 309 through the connecting tube 307, ensuring that the airbag 309 is in an expanded state to provide good protection for the instrument body 1.

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

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

[0061] The specific solution is as follows: when the corner of the instrument falls downward, the protective shell 201 and the protective plate 203 contact the ground, the protective plate 203 drives the hinge block 1 207 and the hinge rod 208 to move, the hinge rod 208 drives the hinge block 209 to move, the hinge block 209 drives the elastic member 212 to contract to reduce the shock of the protective plate 203, and at the same time, the protective shell 201 drives the T-shaped block 204 to move, and the T-shaped block 204 drives the elastic member 1 206 to contract to reduce the shock of the protective shell 201. The shock absorption and buffering of 201 and the protective plate 203 further protect the instrument body 1, ensuring that the instrument body 1 is not likely to collide violently with the ground directly when it falls, so that the instrument body 1 is buffered and is not likely to be damaged, thereby increasing the service life and reducing the loss. When the protective plate 203 contacts and moves with the ground, the protective plate 203 drives the connecting plate 301 and the connecting column 302 to move through the hinge block 207, and the connecting column 302 drives the fixing box 303 to move, and the fixing box 303 The movement squeezes the elastic member 310, and the fixed box 303 and the arc plate 306 approach each other. 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 the airbag 309 through the connecting pipe 307. The airbag 309 expands and protrudes from the surface of the protective shell 201. 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 engages with the latch tooth 313, and will not return. The airbag 309 is inflated all the time. When the instrument body 1 falls down, the airbag 309 provides shock absorption and cushioning to the upper and lower sides of the instrument body 1, and ensures that the display screen 101 and buttons 102 on the instrument body 1 are not easily in contact with the ground and collide with the ground, thereby further ensuring that the instrument body 1 is not easily damaged and the service life is increased.

[0062] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary; within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0063] The present invention is intended 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 should be included in the scope of protection of the present invention.

Claims

1. A handheld geodetic height measuring instrument, comprising: An instrument body (1), wherein a display screen (101) and a button (102) are installed on the top of the instrument body (1), a battery (103) is installed inside the front side of the instrument body (1), and a grip groove (104) is opened on the side of the instrument body (1), characterized in that: A protective mechanism (2) is arranged outside the instrument body (1), the protective mechanism (2) comprising a plurality of protective shells (201) arranged at the four corners of the instrument body (1), the inner walls of the plurality of protective shells (201) are respectively fixedly mounted with T-shaped blocks (204), the sides of the plurality of T-shaped blocks (204) are respectively fixedly mounted with elastic members 1 (206), and the protective shells (201) are used to protect the four corners of the instrument body (1); A buffer mechanism (3) is arranged on the outside of the instrument body (1), and the buffer mechanism (3) includes a fixing box (303) arranged on one side of the protective shell (201), and connecting pipes (307) are fixedly installed on the upper and lower sides of the fixing box (303), and an air bag (309) is fixedly installed on the other end of the connecting pipe (307), and the air bag (309) further protects the instrument body (1).

2. A handheld geodetic height measuring instrument according to claim 1, characterized in that: A plurality of fixing columns (202) are fixedly installed near the side of the plurality of protection shells (201), and a protection plate (203) is fixedly installed on the outer walls of the plurality of fixing columns (202). A plurality of T-shaped slots (205) are respectively opened on the upper and lower sides of the instrument body (1), and 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 slots (205), and the other ends of the plurality of elastic members (206) are respectively fixedly connected to the inner walls of the plurality of T-shaped slots (205).

3. A handheld geodetic height measuring instrument according to claim 2, characterized in that: Two hinged blocks (207) are fixedly mounted on the inner walls of the plurality of protection plates (203), two hinged rods (208) are hinged on the inner walls of the plurality of hinged rods (208), and hinged blocks (209) are hinged on the other ends of the plurality of hinged rods (208).

4. A handheld geodetic height measuring instrument according to claim 3, 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 the plurality of hinge blocks (209), the side surfaces of the plurality of hinge blocks (209) are respectively slidably penetrated by two arc-shaped rods (211), and the two 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).

5. A handheld geodetic height measuring instrument according to claim 4, characterized in that: The outer walls of the plurality of arc-shaped rods (211) are respectively slidably mounted with elastic members 2 (212), and the two ends of the plurality of elastic members 2 (212) are respectively fixedly connected to the side surfaces of the plurality of hinge blocks 2 (209) and the inner walls of the plurality of arc-shaped grooves (210).

6. A handheld geodetic height measuring instrument according to claim 3, characterized in that: A plurality of connecting plates (301) are fixedly installed near the side of the plurality of hinge blocks (207), and connecting columns (302) are 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 fixedly connected to the sides of the plurality of fixed boxes (303), and the inner walls of the plurality of fixed boxes (303) are slidably connected to piston plates (304).

7. A handheld geodetic height measuring instrument according to claim 6, characterized in that: A plurality of movable columns (305) are fixedly mounted on the sides of the plurality of piston plates (304), and the other ends of the plurality of movable columns (305) slide through the inner walls of the plurality of fixed boxes (303) and extend to the outside of the fixed boxes (303). An arc-shaped plate (306) is fixedly mounted on one end of the plurality of movable columns (305), 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).

8. A handheld geodetic height measuring instrument according to claim 7, characterized in that: The sides of the plurality of protective shells (201) are respectively provided with grooves (308), the inner walls of the plurality of grooves (308) are respectively fixedly connected to the outer walls of the plurality of air bags (309), the plurality of connecting tubes (307) are respectively fixedly passed through the sides of the plurality of protective shells (201), and the outer walls of the plurality of arc-shaped plates (306) are respectively fixedly connected to the outer walls of the plurality of fixing boxes (303) via the plurality of elastic members (310).

9. A handheld geodetic height measuring instrument according to claim 8, characterized in that: A plurality of fixed frames (312) are fixedly mounted on the other side surfaces of the plurality of fixed boxes (303); the inner walls of the plurality of fixed frames (312) are rotatably mounted with latching teeth (313) via movable shafts; the outer walls of the plurality of arc-shaped plates (306) are fixedly mounted with two L-shaped rods (311); the top surfaces of one ends of the plurality of L-shaped rods (311) are fixedly mounted with wedge-shaped blocks (315); and the plurality of wedge-shaped blocks (315) are respectively latched with the plurality of latching teeth (313).

10. The handheld geodetic height measuring instrument according to claim 9, characterized in that: Elastic parts four (314) are fixedly installed on the top surfaces of the plurality of latch teeth (313), and the other ends of the plurality of elastic parts four (314) are fixedly connected to the inner walls of the upper ends of the plurality of fixed frames (312). Adjustment rods (316) are fixedly installed on the sides of the plurality of latch teeth (313), and rubber sleeves (318) are fixedly installed on the outer walls of one ends of the plurality of adjustment rods (316). Adjustment grooves (317) are respectively opened through the sides of the plurality of fixed frames (312), and the inner walls of the plurality of adjustment grooves (317) are respectively slidably connected to the outer walls of the plurality of adjustment rods (316).

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