阅读说明：本技术 一种全站仪 (Total station ) 是由 柳继明 谢鹏 朱统华 于 2020-11-28 设计创作，主要内容包括：本申请涉及一种全站仪,其包括机体、控制面板及设在控制面板上的显示屏及键盘,显示屏相对的两侧设有用于存放塑料保护膜筒的收纳固定装置及用于牵引塑料保护膜的牵引收纳装置,位于收纳固定装置及牵引收纳装置之间的塑料保护膜覆盖在控制面板上,控制面板另两侧对称设有用于压紧塑料保护膜的压紧装置。本申请在使用时将缠绕有塑料保护膜的塑料保护膜筒安装在收纳固定装置内,将空的塑料保护膜筒安装在收纳固定装置内,并将塑料保护膜的一端缠绕在空的塑料保护膜筒上,将塑料保护膜覆盖在控制面板上,并通过压紧装置将塑料保护膜固定压紧,有效地减少灰尘等杂物聚积在显示屏及键盘上；通过可牵引收纳装置拉扯更换新的塑料保护膜,简单、方便。(The utility model relates to a total station, it includes organism, control panel and establishes display screen and keyboard on control panel, and the both sides that the display screen is relative are equipped with the storage fixing device who is used for depositing a plastic protection film section of thick bamboo and are used for pulling the storage device that pulls the plastic protection film, and the plastic protection film that is located between storage fixing device and the traction storage device covers on control panel, and control panel bilateral symmetry is equipped with the closing device who is used for compressing tightly the plastic protection film in addition. When the plastic protection film storage device is used, the plastic protection film barrel wound with the plastic protection film is arranged in the storage fixing device, the empty plastic protection film barrel is arranged in the storage fixing device, one end of the plastic protection film is wound on the empty plastic protection film barrel, the plastic protection film covers the control panel, and the plastic protection film is fixedly compressed through the compressing device, so that the dust and other impurities are effectively reduced from being accumulated on the display screen and the keyboard; the plastic protective film which can be dragged and replaced by the tractable storage device is simple and convenient.)

1. A total station, characterized by: including organism (1) and control panel (2) of setting on organism (1), be equipped with display screen (21) and keyboard (22) on control panel (2), the both sides that display screen (21) is relative correspond to be equipped with and are used for depositing plastics protection film section of thick bamboo (3) accomodate fixing device (4) and be used for pulling drawing storage device (5) of plastics protection film (31), are located accomodate fixing device (4) and draw plastics protection film (31) between storage device (5) to cover on control panel (2), control panel (2) do not set up accomodate fixing device (4) or the bilateral symmetry of drawing storage device (5) is equipped with closing device (6) that are used for compressing tightly plastics protection film (31).

2. A total station according to claim 1, characterized in that: the accommodating and fixing device (4) comprises a first fixing shell (41) which is far away from the opening of one side of the machine body (1) and a first fixing cover (42) which is hinged at the opening of the first fixing shell (41), a first clamping and fixing mechanism (43) and a second clamping and fixing mechanism (44) are correspondingly and rotatably arranged at the two ends in the first fixing shell (41), the plastic protective film cylinder (3) is fixedly clamped between the first clamping and fixing mechanism (43) and the second clamping and fixing mechanism (44), a first through hole (45) for the plastic protective film (31) to penetrate out is arranged between the first fixed shell (41) and the traction and storage device (5), the accommodating and fixing device (4) further comprises a limiting mechanism (46) used for limiting the integral rotation of the first clamping and fixing mechanism (43), the second clamping and fixing mechanism (44) and the plastic protective film cylinder (3).

3. A total station according to claim 2, characterized in that: the traction and storage device (5) comprises a second fixed shell (51) with an opening far away from one side of the machine body (1) and a second fixed cover (52) hinged at the opening of the second fixed shell (51), a third clamping and fixing mechanism (53) and a fourth clamping and fixing mechanism (54) are correspondingly arranged at two ends in the second fixing shell (51), the plastic protective film cylinder (3) is clamped between the third clamping and fixing mechanism (53) and the fourth clamping and fixing mechanism (54), a second through hole (55) for the plastic protective film (31) to penetrate is arranged on one side of the second fixing shell (51) close to the containing and fixing device (4), the traction storage device (5) further comprises a driving mechanism (56) which drives the third clamping and fixing mechanism (53), the fourth clamping and fixing mechanism (54) and the plastic protective film barrel (3) to integrally rotate and pull the plastic protective film (31).

4. A total station according to claim 3, characterized in that: the first clamping and fixing mechanism (43) comprises a rotary drum (431) rotatably arranged on one end wall of the first fixing cover (42), a support rod (432) sleeved in the rotary drum (431) and a first positioning disc (433) coaxially and fixedly arranged at one end, far away from the bottom wall of the rotary drum (431), of the support rod (432), a spring (434) is arranged between the support rod (432) and the bottom wall of the rotary drum (431), when the plastic protective film cylinder (3) is clamped between the first clamping and fixing mechanism (43) and the second clamping and fixing mechanism (44), the spring (434) is in a compressed state, and a limiting sliding groove (435) and a limiting block (436) which are matched with each other are arranged on the inner wall of the rotary drum (431) and the support rod (432).

5. A total station according to claim 4, characterized in that: the third clamping and fixing mechanism (53) has the same structure as the first clamping and fixing mechanism (43).

6. A total station according to claim 3, characterized in that: the second clamping and fixing mechanism (44) comprises a rotating shaft (441) rotatably arranged on one end wall of the first fixing cover (42), and a second positioning disc (442) is arranged at one end, close to the first clamping and fixing mechanism (43), of the rotating shaft (441).

7. A total station according to claim 6, characterized in that: the fourth clamping and fixing mechanism (54) is the same as the second clamping and fixing mechanism (44).

8. A total station according to claim 6, characterized in that: the limiting mechanism (46) comprises a first ratchet wheel (461) coaxially and rotatably arranged on the rotating shaft (441) of the second clamping and fixing mechanism (44) and a first pawl (462) used for limiting the first ratchet wheel (461) to freely rotate.

9. A total station according to claim 7, characterized in that: the driving mechanism (56) comprises a second ratchet wheel (561) which is coaxially and rotatably arranged on a rotating shaft (441) of the fourth clamping and fixing mechanism (54) and a second pawl (562) which drives the second ratchet wheel (561) to rotate, a rotating rod (563) which is used for driving the second pawl (562) to rotate is fixed on the second pawl (562), and a hand wheel (564) is arranged at one end, penetrating out of the second fixing shell (51), of the rotating rod (563).

10. A total station according to claim 1, characterized in that: closing device (6) are including setting up control panel (2) are kept away from first fixed plate (61), the setting of organism (1) one side are in be used for supporting on control panel (2) second fixed plate (62), the setting of first fixed plate (61) are in control panel (2) with pressure strip (63), screw thread between first fixed plate (61) are worn to establish on first fixed plate (61) and one end rotate to be connected screw rod (64) and the slip on pressure strip (63) are worn to establish on first fixed plate (61) and with pressure strip (63) fixed connection's guide bar (65).

Technical Field

The application relates to the field of engineering surveying tools, in particular to a total station.

Background

A total station, i.e. a total station type electronic distance meter, is a high-tech measuring instrument integrating light, machine and electricity into one body, and is a surveying instrument system integrating horizontal angle, vertical angle, distance (slant distance, horizontal distance) and height difference measuring functions into one body. The total station is called as a total station because all measurement work on the station can be completed by arranging the instrument once. The method is widely applied to the field of precision engineering measurement or deformation monitoring of overground large-scale buildings, underground tunnel construction and the like.

Chinese patent with application number 201710404702.X discloses a total station, including organism, electrical power generating system, angle measurement ranging system, ending fine motion adjustment mechanism, display screen and the keyboard of setting on the organism, be provided with the dimming board that has position recognition function in the organism, the dimming board is circular, annular outer shading area, interior shading area and installation fixed area have on the dimming board, the decay membrane of different luminosities is scribbled respectively in outer shading area and the interior shading area, distinguishes interior, outer shading area into transparent full light transmission area, from dark to shallow excessive light transmission area and dark light tight district, and the dimming board is whole to be installed on the optical axis of light path is accepted to the organism. Through setting up the light reduction board that has the position recognition function for the total powerstation can effectively avoid because laser diffraction causes the asynchronous problem of reflection callback signal, and the display screen high low temperature characteristic with OLED preparation is superior, can adapt to special environment such as severe cold or high temperature.

Aiming at the related technologies, the inventor thinks that the total station is often used in the field, and the display screen and the keyboard of the total station are directly exposed outside, so that dust is easily accumulated on the display screen and the keyboard, and normal use of a user is affected.

Disclosure of Invention

In order to improve the problem that the display screen and the keyboard of total station are easy to accumulate dust, the application provides a total station.

The total station provided by the application adopts the following technical scheme:

the utility model provides a total station, includes organism and the control panel of setting on the organism, the last display screen and the keyboard of being equipped with of control panel, the both sides correspondence that the display screen is relative is equipped with the storage fixing device who is used for depositing a plastic protection film section of thick bamboo and is used for pulling the traction storage device of plastic protection film, is located storage fixing device reaches the plastic protection film that pulls between the storage device covers on control panel, control panel does not set up storage fixing device or the bilateral symmetry that pulls storage device is equipped with the closing device who is used for compressing tightly the plastic protection film.

By adopting the technical scheme, when the total station is used, the plastic protection film barrel wound with the plastic protection film is arranged in the storage fixing device, the empty plastic protection film barrel is arranged between the traction storage devices, one end of the plastic protection film on the plastic protection film barrel wound with the plastic protection film is wound on the empty plastic protection film barrel, so that the plastic protection film covers the display screen and the keyboard on the control panel, and then the plastic protection film is pressed on the control panel through the pressing device, thereby effectively reducing the accumulation of dust and other impurities on the display screen and the keyboard; after the plastic protection film covering the control panel is dirty or damaged, the pressing device is loosened to press the plastic protection film, the plastic protection film pulling the dirty section through the pulling and containing device is wound on the plastic protection film barrel in the pulling and containing device, meanwhile, a new plastic protection film section is covered on the control panel, and the pressing device is reused to press the new plastic protection film section, so that the replacement of a user is facilitated.

Optionally, the accommodating and fixing device comprises a first fixing shell far away from an opening in one side of the machine body and a first fixing cover hinged to an opening of the first fixing shell, a first clamping and fixing mechanism and a second clamping and fixing mechanism are arranged at two corresponding ends in the first fixing shell in a rotating mode, the plastic protective film barrel is fixedly clamped between the first clamping and fixing mechanism and the second clamping and fixing mechanism, the first fixing shell is close to the position between the traction and accommodating devices, a first opening for the plastic protective film to penetrate out is formed in the traction and accommodating device, and the accommodating and fixing device further comprises a limiting mechanism for limiting the first clamping and fixing mechanism, the second clamping and fixing mechanism and the plastic protective film barrel to integrally rotate.

By adopting the technical scheme, the first fixing cover is opened, the plastic protection film cylinder wound with the plastic protection film is clamped between the first clamping and fixing mechanism and the second clamping and fixing mechanism in the first fixing shell, the traction and storage device pulls the plastic protection film to move towards one end of the traction and storage device to drive the plastic protection film cylinder in the first fixing shell to rotate and unfold the plastic protection film, the first clamping and fixing mechanism, the second clamping and fixing mechanism and the plastic protection film cylinder are enabled to integrally rotate synchronously with the plastic protection film cylinder in the traction and storage device through the limiting mechanism, and the plastic protection film cylinder is convenient for a user to use.

Optionally, the traction storage device comprises a second fixing shell which is far away from an opening on one side of the machine body and a second fixing cover which is hinged to an opening of the second fixing shell, a third clamping and fixing mechanism and a fourth clamping and fixing mechanism are correspondingly arranged at two ends in the second fixing shell, the plastic protection film barrel is clamped between the third clamping and fixing mechanism and the fourth clamping and fixing mechanism, the second fixing shell is close to one side of the storage and fixing device and is provided with a second opening through which the plastic protection film penetrates, and the traction storage device further comprises a driving mechanism which drives the third clamping and fixing mechanism, the fourth clamping and fixing mechanism and a driving mechanism which drives the plastic protection film barrel to rotate integrally.

By adopting the technical scheme, the second fixing cover is opened, the empty plastic protection film cylinder is clamped between the third clamping and fixing mechanism and the fourth clamping and fixing mechanism in the second fixing shell, and the driving mechanism drives the third clamping and fixing mechanism, the fourth clamping and fixing mechanism and the plastic protection film cylinder to integrally rotate to pull the plastic protection film to be wound on the plastic protection film cylinder.

Optionally, the first clamping and fixing mechanism includes a rotary drum rotatably disposed on one end wall of the first fixing cover, a supporting rod sleeved in the rotary drum, and a first positioning plate coaxially and fixedly disposed at one end of the supporting rod far away from the bottom wall of the rotary drum, a spring is disposed between the supporting rod and the bottom wall of the rotary drum, when the plastic protective film cylinder is clamped between the first clamping and fixing mechanism and the second clamping and fixing mechanism, the spring is in a compressed state, and the inner wall of the rotary drum and the supporting rod are provided with a limiting chute and a limiting block which are matched with each other.

Through adopting above-mentioned technical scheme, a plastic protection film section of thick bamboo one end with first positioning disk is laminated mutually, and first positioning disk receive behind the pressure through branch compression spring and with the cooperation of second centre gripping fixed establishment with the tighter of plastic protection film section of thick bamboo centre gripping, and cooperate through spacing spout and stopper and reduce the relative rotation between branch and the rotary drum when first centre gripping fixed establishment rotates effectively.

Optionally, the third clamping and fixing mechanism has the same structure as the first clamping and fixing mechanism.

Through adopting above-mentioned technical scheme, through the cooperation of third centre gripping fixed establishment and fourth centre gripping fixed establishment with the tighter of a plastic protection film section of thick bamboo centre gripping.

Optionally, the second clamping and fixing mechanism comprises a rotating shaft rotatably arranged on one end wall of the first fixing cover, and a second positioning disc is arranged at one end, close to the first clamping and fixing mechanism, of the rotating shaft.

Through adopting above-mentioned technical scheme, the second positioning disk rotates and drives the pivot and rotate, and a plastics protection film section of thick bamboo centre gripping is between first positioning disk and second positioning disk, simple structure, and convenience of customers uses.

Optionally, the fourth clamping and fixing mechanism has the same structure as the second clamping and fixing mechanism.

Through adopting above-mentioned technical scheme, an empty plastic protection film section of thick bamboo also centre gripping is between first positioning disk and second positioning disk, simple structure, and convenience of customers uses.

Optionally, the limiting mechanism includes a first ratchet wheel coaxially and rotatably disposed on the rotating shaft of the second clamping and fixing mechanism, and a first pawl for limiting the first ratchet wheel to rotate randomly.

Through adopting above-mentioned technical scheme, the pivot rotates and drives first ratchet and rotate, and first pawl and the cooperation of first ratchet make first ratchet can only unidirectional rotation, and then restrict first centre gripping fixed establishment, second centre gripping fixed establishment and a plastics protection film section of thick bamboo and rotate wholly.

Optionally, actuating mechanism sets up including coaxial rotation fourth centre gripping fixed establishment's epaxial second ratchet and drive second ratchet pivoted second pawl, be fixed with on the second pawl and be used for the drive second pawl pivoted dwang, the dwang is worn out the one end of second set casing is equipped with the hand wheel.

Through adopting above-mentioned technical scheme, when the user need change new plastic protection film, rotate the hand wheel, the hand wheel rotates and drives the dwang and rotate, and the dwang rotates and drives the second pawl and rotate, and then stirs the second ratchet through the second pawl and rotate, and the second ratchet rotates and drives the pivot and rotate, the pivot rotate drive third centre gripping fixed establishment, fourth centre gripping fixed establishment with plastic protection film section of thick bamboo is whole to be rotated.

Optionally, the pressing device is in including setting up control panel keeps away from the first fixed plate of organism one side, setting are in control panel is last to be used for supporting the second fixed plate of first fixed plate, setting are in control panel with pressure strip, screw thread between the first fixed plate wear to establish on the first fixed plate and one end rotate to be connected screw rod and slip on the pressure strip wear to establish on the first fixed plate and with pressure strip fixed connection's guide bar.

Through adopting above-mentioned technical scheme, when the user need use closing device to compress tightly the plastic protection film, rotate the screw rod, the screw rod rotates and drives the pressure strip and move towards plastic protection film one side along the guide bar and tightly press the plastic protection film on control panel.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the total station is used, the plastic protection film barrel wound with the plastic protection film is installed in the accommodating and fixing device, the empty plastic protection film barrel is installed between the traction and accommodating devices, one end of the plastic protection film on the plastic protection film barrel wound with the plastic protection film is wound on the empty plastic protection film barrel, the plastic protection film covers the upper portion of a display screen and the upper portion of a keyboard on a control panel, then the plastic protection film is pressed on the control panel through the pressing device, and dust and other impurities are effectively reduced from being accumulated on the display screen and the keyboard;

2. after the plastic protection film covering the control panel is dirty or damaged, the pressing device is loosened to press the plastic protection film, the plastic protection film pulling the dirty section through the pulling and containing device is wound on the plastic protection film barrel in the pulling and containing device, meanwhile, a new plastic protection film section is covered on the control panel, and the pressing device is reused to press the new plastic protection film section, so that the replacement of a user is facilitated. Drawings

Fig. 1 is a schematic overall structure diagram of a total station according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a control panel, a storage fixing device and a traction storage device according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an internal structure of the storage fixture according to the embodiment of the present application;

fig. 4 is a perspective sectional view of a storage fixture according to an embodiment of the present application;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is an internal structure schematic diagram of a traction storage device according to an embodiment of the present application.

Description of reference numerals: 1. a body; 2. a control panel; 21. a display screen; 22. a keyboard; 3. a plastic protective film cylinder; 31. a plastic protective film; 4. a storage fixing device; 41. a first stationary case; 42. a first fixed cover; 43. a first clamping and fixing mechanism; 431. a rotating drum; 432. a strut; 433. a first positioning plate; 434. a spring; 435. a limiting chute; 436. a limiting block; 44. a second clamping and fixing mechanism; 441. a rotating shaft; 442. a second positioning plate; 45. a first port; 46. a limiting mechanism; 461. a first ratchet wheel; 462. a first pawl; 5. a traction storage device; 51. a second stationary case; 52. a second stationary cover; 53. a third clamping and fixing mechanism; 54. a fourth clamping and fixing mechanism; 55. a second port; 56. a drive mechanism; 561. a second ratchet wheel; 562. a second pawl; 563. rotating the rod; 564. a hand wheel; 6. a pressing device; 61. a first fixing plate; 62. a second fixing plate; 63. a compression plate; 64. a screw; 65. a guide bar; 7. a partition plate; 8. and (6) positioning a groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses total powerstation. As shown in fig. 1 and 2, a total station includes a machine body 1 and a control panel 2 installed on the machine body 1, wherein a display screen 21 and a keyboard 22 are embedded on the control panel 2. As shown in fig. 2 and 3, the storage fixing device 4 for storing the plastic protective film cylinder 3 and the traction storage device 5 for pulling the plastic protective film 31 are correspondingly arranged on two opposite sides of the display screen 21, the plastic protective film 31 between the storage fixing device 4 and the traction storage device 5 is covered on the control panel 2, and the holding devices 6 for holding the plastic protective film 31 are symmetrically arranged on two sides of the control panel 2 where the storage fixing device 4 is not arranged or the traction storage device 5 is arranged. When the total station is used, the plastic protection film barrel 3 wound with the plastic protection film 31 is arranged in the accommodating and fixing device 4, the empty plastic protection film barrel 3 is arranged between the traction and accommodating devices 5, one end of the plastic protection film 31 on the plastic protection film barrel 3 wound with the plastic protection film 31 is wound on the empty plastic protection film barrel 3, the plastic protection film 31 covers the upper parts of the display screen 21 and the keyboard 22 on the control panel 2, and then the plastic protection film 31 is pressed on the control panel 2 through the pressing device 6, so that dust and other impurities are effectively reduced from being accumulated on the display screen 21 and the keyboard 22; when the section of plastic protection film 31 covered on the control panel 2 is dirty or damaged, the pressing device 6 is loosened to press the plastic protection film 31, the plastic protection film 31 at the dirty section is drawn by the drawing and containing device 5 to be wound on the plastic protection film barrel 3 in the drawing and containing device 5, meanwhile, a new section of plastic protection film 31 is covered on the control panel 2, the pressing device 6 is used again to press the new section of plastic protection film 31, and the replacement by a user is facilitated.

As shown in fig. 1 and fig. 2, the pressing device 6 includes a first fixing plate 61 disposed in parallel on the side of the control panel 2 away from the machine body 1, a second fixing plate 62 perpendicularly welded on the control panel 2 and used for supporting the first fixing plate 61, a pressing plate 63 disposed between the control panel 2 and the first fixing plate 61, a screw 64 threaded on the first fixing plate 61 and having one end rotatably connected to the pressing plate 63, and a guide rod 65 slidably disposed on the first fixing plate 61 and fixedly connected to the pressing plate 63, the first fixing plate 61 is welded to the second fixing plate 62, a special-shaped head is fixedly disposed at one end of the screw 64 away from the pressing plate 63, and a stopper is welded at one end of the guide rod 65 away from the pressing plate 63. When a user needs to use the pressing device 6 to press the plastic protection film 31, the screw 64 is rotated, and the screw 64 rotates to drive the pressing plate 63 to move along the guide rod 65 towards the side of the plastic protection film 31 so as to tightly press the plastic protection film 31 on the control panel 2.

As shown in fig. 2 and fig. 3, the storage fixing device 4 includes a first fixing housing 41 far away from the opening of the machine body 1 and a first fixing cover 42 hinged at the opening of the first fixing housing 41, a first clamping fixing mechanism 43 and a second clamping fixing mechanism 44 are correspondingly and rotatably disposed at two ends in the first fixing housing 41, the plastic protective film cylinder 3 is fixedly clamped between the first clamping fixing mechanism 43 and the second clamping fixing mechanism 44, a first through hole 45 for the plastic protective film 31 to penetrate out is disposed between the first fixing housing 41 and the traction storage device 5, and the storage fixing device 4 further includes a limiting mechanism 46 for limiting the first clamping fixing mechanism 43, the second clamping fixing mechanism 44 and the plastic protective film cylinder 3 to integrally rotate. The first fixing cover 42 is opened, the plastic protection film barrel 3 wound with the plastic protection film 31 is clamped between the first clamping fixing mechanism 43 and the second clamping fixing mechanism 44 in the first fixing shell 41, the traction and storage device 5 pulls the plastic protection film 31 to move towards one end of the traction and storage device 5 to drive the plastic protection film barrel 3 in the first fixing shell 41 to rotate and unfold the plastic protection film 31, and the first clamping fixing mechanism 43, the second clamping fixing mechanism 44 and the plastic protection film barrel 3 are enabled to integrally rotate synchronously with the plastic protection film barrel 3 in the traction and storage device 5 through the limiting mechanism 46.

As shown in fig. 3 and 4, the first clamping and fixing mechanism 43 includes a rotary drum 431 rotatably disposed on an end wall of the first fixing cover 42, a support rod 432 sleeved in the rotary drum 431, and a first positioning plate 433 coaxially fixedly welded to an end of the support rod 432 away from a bottom wall of the rotary drum 431, a spring 434 is disposed between the support rod 432 and the bottom wall of the rotary drum 431, and when the plastic protection film cylinder 3 is clamped between the first clamping and fixing mechanism 43 and the second clamping and fixing mechanism 44, the spring 434 is in a compressed state. As shown in fig. 5, the inner wall of the rotating cylinder 431 and the supporting rod 432 are provided with a limiting sliding groove 435 and a limiting block 436 which are matched with each other. One end of the plastic protective film cylinder 3 is attached to the first positioning disc 433, and the first positioning disc 433 is pressed to compress the spring 434 through the support rod 432 and cooperate with the second clamping and fixing mechanism 44 to clamp the plastic protective film cylinder 3 more tightly, and the relative rotation between the support rod 432 and the rotary cylinder 431 is effectively reduced when the first clamping and fixing mechanism 43 rotates through the mutual cooperation of the limiting sliding groove 435 and the limiting block 436.

As shown in fig. 3, the second clamping and fixing mechanism 44 includes a rotating shaft 441 rotatably disposed on an end wall of the first fixing cover 42, and a second positioning plate 442 is coaxially welded to an end of the rotating shaft 441 close to the first clamping and fixing mechanism 43. The second positioning plate 442 rotates to drive the rotating shaft 441 to rotate, and the plastic protection film barrel 3 is clamped between the first positioning plate 433 and the second positioning plate 442, so that the plastic protection film barrel is simple in structure and convenient for a user to use.

As shown in fig. 3, the limiting mechanism 46 includes a first ratchet wheel 461 coaxially and rotatably fixed on the rotating shaft 441 of the second clamping and fixing mechanism 44, and a first pawl 462 for limiting the first ratchet wheel 461 to rotate freely. The rotation shaft 441 rotates to drive the first ratchet wheel 461 to rotate, and the first pawl 462 cooperates with the first ratchet wheel 461 to enable the first ratchet wheel 461 to rotate only in one direction, so as to limit the first clamping and fixing mechanism 43, the second clamping and fixing mechanism 44 and the plastic protective film barrel 3 to rotate integrally.

As shown in fig. 2 and 6, the traction storage device 5 includes a second fixing housing 51 away from the opening of the machine body 1 and a second fixing cover 52 hinged at the opening of the second fixing housing 51, a third clamping fixing mechanism 53 and a fourth clamping fixing mechanism 54 are correspondingly disposed at two ends in the second fixing housing 51, the plastic protective film cylinder 3 is clamped between the third clamping fixing mechanism 53 and the fourth clamping fixing mechanism 54, a second through hole 55 for the plastic protective film 31 to penetrate is disposed at one side of the second fixing housing 51 close to the storage fixing device 4, and the traction storage device 5 further includes a driving mechanism 56 for driving the third clamping fixing mechanism 53, the fourth clamping fixing mechanism 54 and the plastic protective film cylinder 3 to integrally rotate and pull the plastic protective film 31. The second fixing cover 52 is opened, the empty plastic protection film barrel 3 is clamped between the third clamping and fixing mechanism 53 and the fourth clamping and fixing mechanism 54 in the second fixing shell 51, and the driving mechanism 56 drives the third clamping and fixing mechanism 53, the fourth clamping and fixing mechanism 54 and the plastic protection film barrel 3 to integrally rotate so as to pull the plastic protection film 31 to be wound on the plastic protection film barrel 3.

As shown in fig. 6, the third clamp fixing mechanism 53 has the same structure as the first clamp fixing mechanism 43, and the fourth clamp fixing mechanism 54 has the same structure as the second clamp fixing mechanism 44. The driving mechanism 56 includes a second ratchet wheel 561 coaxially and rotatably fixed on the rotating shaft 441 of the fourth clamping and fixing mechanism 54, and a second pawl 562 for driving the second ratchet wheel 561 to rotate, a rotating rod 563 is fixed on the second pawl 562 for driving the second pawl 562 to rotate, and a hand wheel 564 is disposed at one end of the rotating rod 563 penetrating through the second fixing shell 51. When a user needs to replace a new plastic protection film 31, the hand wheel 564 is rotated to drive the rotating rod 563 to rotate, the rotating rod 563 is rotated to drive the second pawl 562 to rotate, and then the second pawl 562 is toggled to rotate the second ratchet 561, the second ratchet 561 is rotated to drive the rotating shaft 441 to rotate, and the rotating shaft 441 rotates to drive the third clamping and fixing mechanism 53, the fourth clamping and fixing mechanism 54 and the plastic protection film barrel 3 to integrally rotate.

As shown in fig. 4 and 6, the partition plates 7 are welded inside the first fixing case 41 and inside the second fixing case 51, a through hole for the rotation shaft 441 to pass through is formed in each partition plate 7, and the second positioning plate 442 is coaxially welded at one end of the rotation shaft 441 passing through the through hole. The spacing mechanism 46 or the driving mechanism 56 is separated from the plastic protective film cylinder 3 by the clapboard 7 for safety protection.

As shown in fig. 4 and 6, the positioning grooves 8 for limiting the position of the plastic protective film cylinder 3 are disposed on the opposite sides of the first positioning plate 433 and the second positioning plate 442. The positioning groove 8 is used for conveniently positioning the plastic protective film cylinder 3.

The implementation principle of the total station in the embodiment of the application is as follows: when the total station is used, the plastic protection film barrel 3 wound with the plastic protection film 31 is clamped between the first clamping and fixing mechanism 43 and the second clamping and fixing mechanism 44, the empty plastic protection film barrel 3 is clamped between the third clamping and fixing mechanism 53 and the fourth clamping and fixing mechanism 54, one end of the plastic protection film 31 wound on the plastic protection film barrel 3 with the plastic protection film 31 is wound on the empty plastic protection film barrel 3, and the plastic protection film 31 covers the display screen 21 and the keyboard 22 on the control panel 2; then, the screw 64 is rotated, the screw 64 rotates to drive the pressing plate 63 to move along the guide rod 65 toward the plastic protection film 31 side, so that the plastic protection film 31 is tightly pressed on the control panel 2, and dust and other impurities are effectively reduced from being accumulated on the display screen 21 and the keyboard 22.

After the section of plastic protection film 31 that covers on control panel 2 is dirty or damaged, loosen the compressing tightly of closing device 6 to plastic protection film 31, and rotate hand wheel 564, hand 564 rotates and drives dwang 563 to rotate, dwang 563 rotates and drives second pawl 562 to rotate, and then stir second ratchet 561 through second pawl 562 and rotate, second ratchet 561 rotates and drives pivot 441 to rotate, pivot 441 rotates and drives third centre gripping fixed establishment 53, fourth centre gripping fixed establishment 54 rotates with plastic protection film section of thick bamboo 3 is whole, and then pull plastic protection film 31 and twine on plastic protection film section of thick bamboo 3 in pulling storage device 5, pull storage device 5 and pull plastic protection film 31 to pull storage device 5 one end and move and drive plastic protection film section of thick bamboo 3 in the first set casing 41 and rotate and launch plastic protection film 31, thereby realize the change of plastic protection film 31.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.