Protective device of multi-channel acquisition instrument

Abstract

The invention discloses a protective device of a multi-channel acquisition instrument, and relates to the technical field of acquisition instrument protection.The protective device comprises a shell, a grip is rotationally installed at the top of the shell, an adjusting button is arranged on the surface of the shell, a control button is arranged on the surface of the shell, and a winding roll is rotationally installed on the inner wall of the shell; the hollow cylinder rotationally penetrates through the inner wall and the outer wall of the shell, the handle is fixedly installed at the end, away from the winding roll, of the hollow cylinder, the end, away from the handle, of the hollow cylinder is fixedly installed on the face, close to the inner wall of the shell, of the winding roll, the detection mainboard is fixedly installed on the inner wall of the shell, and the detection mainboard is electrically connected with the control button. After the transmission line is wound, the space occupied by the transmission line in the shell can be reduced, and the situation that due to the fact that the transmission line is placed disorderly, air in the shell cannot circulate, a detection mainboard is overheated, the detection reaction is slowed down, and the working efficiency is affected is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of collector protection, in particular to a protection device for a multi-channel collector. Background Art

[0002] A multi-channel data acquisition instrument is a device used to collect data from multiple signal sources at the same time. It is widely used in scientific research, industrial monitoring, medical testing and other fields. The patent with patent announcement number CN214333700U relates to a protective device for a multi-channel collector, including a fixed plate, a side wall of the fixed plate being threadedly connected with bolts, a horizontal plate being fixedly installed on the upper end of the side wall of the fixed plate, a vertical plate being fixedly installed on the lower end of the horizontal plate, one side of the vertical plate being fixedly connected to the side wall of the fixed plate, a first baffle being fixedly connected to the right side of the lower end of the horizontal plate, one side of the first baffle being fixedly connected to the side wall of the vertical plate, a fixed block being fixedly connected to the lower end of the first baffle, the horizontal plate can block rainwater above the collector body, and the vertical plate and the first baffle can block rainwater at the front and rear ends and the sides of the collector body, thereby achieving the effect of shielding from rain, and the horizontal plate, the vertical plate and the first baffle can play a protective role for the collector body, and the arc plate can play an anti-collision role. When the arc plate is hit, the impact direction can be transferred through the arc surface, and when the arc plate is damaged, the spring can play a buffering role.

[0003] In the above patent, the horizontal plate, the vertical plate and the first baffle can provide protection for the collector body, and the curved plate can provide anti-collision function. When the curved plate is hit, the direction of the impact can be diverted through the curved surface. When the curved plate is damaged, the spring can provide a buffer. However, when the internal data cables of the collector are placed in a messy manner, the data cables will block the air circulation inside the collector, resulting in the inability to discharge the heat inside the collector, which will reduce the overheating reaction speed of the collector. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a protective device for a multi-channel data acquisition instrument, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A protective device for a multi-channel data acquisition instrument, comprising a housing, a handle rotatably mounted on the top of the housing, an adjustment button disposed on the surface of the housing, a control button disposed on the surface of the housing, and a winding device, a limiting device and a fixing device disposed on the bottom of the handle; The winding device includes: a wire reel, a hollow cylinder, a handle, a detection mainboard, a transmission line, a square rod, an air filling box and a curved surface block. The wire reel is rotatably mounted on the inner wall of the outer shell, the hollow cylinder is rotatably penetrated through the inner and outer walls of the outer shell, the handle is fixedly mounted on the end of the hollow cylinder away from the wire reel, the end of the hollow cylinder away from the handle is fixedly mounted on the side of the wire reel close to the inner wall of the outer shell, the detection mainboard is fixedly mounted on the inner wall of the outer shell, the detection mainboard is electrically connected to the control button, the detection mainboard is electrically connected to the adjustment button, and the transmission line is arranged on the wire reel. The transmission line is electrically connected to the output end of the detection mainboard, the square rod is fixedly mounted on the inner wall of the hollow cylinder, the air-filling box is fixedly mounted on the surface of the square rod, the arc block is slidably mounted on the inner wall of the air-filling box, and an air outlet is provided on the surface of the air-filling box. The movement of the arc block will squeeze the air inside the air-filling box and discharge it through the air outlet. Before the air inside the air-filling box is completely discharged, the arc block cannot continue to rotate completely, and the outer shell prevents the arc block from continuing to rotate. The air outlet slowly discharges the air inside the air-filling box, so that the speed of manually turning the handle is limited.

[0006] According to the above technical solution, a No. 1 spring is arranged between the inflation box and the arc surface block, the arc surface block is in contact with the shell, and the No. 1 spring drives the arc surface block to reset.

[0007] According to the above technical solution, the limiting device includes: a storage box 1, a sliding plate, a transmission rod, a vertical rod and a friction block, the storage box 1 is fixedly installed on the inner wall of the outer shell, the sliding plate is slidably installed on the inner wall of the storage box 1, the transmission rod is fixedly installed on the bottom of the sliding plate, the vertical rod slides through the inner and outer walls of the storage box 1, the vertical rod is fixedly installed on the bottom of the transmission rod, and the friction block is fixedly installed on a side of the vertical rod close to the outer shell. After the friction block contacts the cable reel, the resistance between the friction block and the cable reel increases, so that the cable reel cannot continue to rotate, so that after the transmission line is completely tightened, the cable reel cannot continue to rotate.

[0008] According to the above technical solution, the limiting device also includes: a push rod, a reset block and a reset rod. The push rod slides through the inner and outer walls of the outer shell, the reset block is fixedly installed at the end of the push rod away from the storage box one, the reset rod slides through the inner and outer walls of the storage box one, and the reset rod is fixedly installed on the top of the sliding plate. The movement of the sliding plate toward the bottom will drive the transmission rod to move toward the bottom, the movement of the transmission rod toward the bottom will drive the vertical rod to move toward the bottom, the movement of the vertical rod toward the bottom will drive the friction block to move toward the bottom, and after the friction block moves to the bottom, it no longer contacts the cable reel, so that the cable reel can continue to rotate.

[0009] According to the above technical solution, a No. 2 spring is arranged between the sliding plate and the storage box 1, the push rod is in contact with the reset rod, and the sliding plate is driven to reset by the No. 2 spring.

[0010] According to the above technical scheme, the fixing device includes: a second storage box, a slide plate, a telescopic rod, a transmission vertical rod and an inclined plane block, the second storage box is fixedly installed on the inner wall of the outer shell, the slide plate is slidably installed on the inner wall of the second storage box, the telescopic rod is fixedly installed on the bottom of the inner wall of the second storage box, the slide plate is fixedly installed on the top of the free end of the telescopic rod, the transmission vertical rod slides through the inner and outer walls of the second storage box, one end of the transmission vertical rod is fixedly installed on the top of the slide plate, the transmission vertical rod is fixedly installed on the bottom of the vertical rod, and the inclined plane block is fixedly installed on a side of the slide plate close to the cable reel, the free end of the telescopic rod moves toward the top, which drives the slide plate to move toward the bottom, the slide plate moves toward the bottom, which drives the inclined plane block to move toward the bottom, and the inclined plane block moves toward the bottom, which drives the cable reel to rotate slightly in the opposite direction. After the cable reel rotates, the transmission line in a tightened state will be slightly stretched.

[0011] According to the above technical scheme, the fixing device also includes: a cylinder, a horizontal plate, a through rod, a positioning hook, a limiting hook, a triangular block and a limiting block, the cylinder is fixedly installed on a side of the storage box second close to the detection main board, the horizontal plate is fixedly installed on a side of the skateboard away from the inclined block, the through rod slides and passes through the inner and outer walls of the cylinder, one end of the bottom of the through rod is fixedly installed on the end of the horizontal plate away from the skateboard, the positioning hook is fixedly installed on the circumferential surface of the cylinder, the limiting hook is fixedly installed on the top of the through rod, the triangular block is fixedly installed on the surface of the positioning hook, and the limiting block is fixedly installed on the surface of the limiting hook, the movement of the horizontal plate toward the bottom will drive the through rod to move toward the bottom, the movement of the through rod toward the bottom will drive the limiting hook to move toward the bottom, the movement of the limiting hook toward the bottom will drive the limiting block to move toward the bottom, and after the limiting block moves to the bottom, it will contact the triangular block and limit the positioning hook.

[0012] According to the above technical solution, the limit block is in contact with the triangular block, and a No. 3 spring is arranged between the penetrating rod and the cylinder, and the No. 3 spring drives the penetrating rod to reset.

[0013] The present invention provides a protective device for a multi-channel data acquisition instrument, which has the following beneficial effects: (1) The invention reduces the space occupied by the transmission line inside the housing after the transmission line is rolled up, allowing air inside the housing to circulate and preventing the transmission line from being placed in a disorderly manner so that the air inside the housing cannot circulate, causing the detection mainboard to overheat and slowing down the detection response, thereby affecting work efficiency. The outer shell blocks the arc block from continuing to rotate, and the air outlet slowly discharges the air inside the inflation box, limiting the speed of manually turning the handle, preventing the transmission line from being pulled and damaged when the operator turns it quickly, thereby improving the protection of the device.

[0014] (2) The invention prevents the cable reel from rotating further due to the increased resistance between the friction block and the cable reel after the friction block contacts the cable reel. This prevents the cable reel from rotating further after the transmission line is fully tightened. This prevents the worker from over-reeling the transmission line, which would cause the transmission line to be pulled and the electrical connection between the transmission line and the detection main board to be disconnected. This improves the stability of the device during operation. The friction block moves to the bottom and no longer contacts the cable reel, allowing the cable reel to rotate further. This prevents the resistance between the friction block and the cable reel from being too large, which would cause the second spring to be unable to reset and the cable reel to be unable to extend. This improves the practicality of the device.

[0015] (3) The invention slightly stretches the tightened transmission line by rotating the cable reel, preventing the tightened transmission line from having a virtual connection with the detection main board when impacted, causing subsequent work to be in a virtual power state and damaging the components. The limit block moves to the bottom and contacts the triangular block to limit the positioning hook, so that the connection between the transmission line and the detection main board is fixed, further stabilizing the connection between the transmission line and the detection main board and improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the overall structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the housing of the present invention; Figure 4 This is a schematic diagram of the structure of the position relationship between the push rod and the housing of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the inflatable box of the present invention; Figure 6 This is a schematic diagram of a cross-sectional structure of a storage box of the present invention; Figure 7 It is a schematic diagram of the structure of the fixing device of the present invention; Figure 8 It is a schematic diagram of the cylindrical cross-section structure of the present invention.

[0017] In the figure: 1. shell; 2. grip; 3. adjustment button; 4. control button; 51. winding reel; 52. hollow cylinder; 53. handle; 54. detection main board; 55. transmission line; 56. square rod; 57. inflatable box; 58. arc block; 59. spring No. 1; 61. storage box one; 62. sliding plate; 63. spring No. 2; 64. transmission rod; 65. vertical rod; 66. friction block; 67. push rod; 68. reset block; 69. reset rod; 71. storage box two; 72. slide plate; 73. telescopic rod; 74. transmission vertical rod; 75. inclined block; 76. cylinder; 77. horizontal plate; 78. through rod; 79. positioning hook; 710. limit hook; 711. triangle block; 712. limit block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 8 One embodiment of the present invention is: a protective device for a multi-channel data acquisition instrument, comprising a shell 1, a handle 2 is rotatably mounted on the top of the shell 1, an adjustment button 3 is arranged on the surface of the shell 1, a control button 4 is arranged on the surface of the shell 1, and a winding device is arranged at the bottom of the handle 2, the winding device comprises: a winding drum 51, a hollow cylinder 52, a handle 53, a detection mainboard 54, a transmission line 55, a square rod 56, an inflatable box 57 and an arc surface block 58, the winding drum 51 is rotatably mounted on the inner wall of the shell 1, the hollow cylinder 52 is rotatably penetrated through the inner and outer walls of the shell 1, the handle 53 is fixedly mounted on one end of the hollow cylinder 52 away from the winding drum 51, and the end of the hollow cylinder 52 away from the handle 53 is fixedly mounted on a side of the winding drum 51 close to the inner wall of the shell 1, and the detection mainboard 54 is fixedly mounted on the inner wall of the shell 1. It is fixedly installed on the inner wall of the shell 1, the detection mainboard 54 is electrically connected to the control button 4, the detection mainboard 54 is electrically connected to the adjustment button 3, the transmission line 55 is arranged on the circumferential surface of the winding drum 51, and the transmission line 55 is electrically connected to the output end of the detection mainboard 54 to prevent the transmission line 55 from being placed in a disorderly manner so that the air inside the shell 1 cannot circulate, causing the detection mainboard 54 to overheat and slow down the detection reaction, affecting the work efficiency. The square rod 56 is fixedly installed on the inner wall of the hollow cylinder 52, and the inflation box 57 is fixedly installed on the surface of the square rod 56. The arc block 58 is slidably installed on the inner wall of the inflation box 57. The surface of the inflation box 57 is provided with an air outlet to prevent the transmission line 55 from being pulled and damaged when the staff rotates quickly, thereby improving the protection of the device.

[0020] A No. 1 spring 59 is provided between the inflation box 57 and the arc surface block 58. The arc surface block 58 is in contact with the housing 1, and the No. 1 spring 59 drives the arc surface block 58 to reset.

[0021] When the present embodiment is working, the handle 53 is manually rotated, and the rotation of the handle 53 drives the hollow cylinder 52 to rotate, and the rotation of the hollow cylinder 52 drives the winding drum 51 to rotate, and the rotation of the winding drum 51 drives the transmission line 55 to be wound up. After the transmission line 55 is wound up, the space occupied by the transmission line 55 inside the shell 1 is reduced, so that the air inside the shell 1 can circulate, and the transmission line 55 is prevented from being placed in a disorderly manner so that the air inside the shell 1 cannot circulate, resulting in overheating of the detection mainboard 54 and slow detection reaction, affecting work efficiency. The rotation of the hollow cylinder 52 drives the square rod 56 to rotate, and the rotation of the square rod 56 drives the inflation box 57 to rotate, and the rotation of the inflation box 57 drives the arc block 58 The arc block 58 rotates and contacts with the shell 1. As the arc block 58 rotates, the rotation of the arc block 58 will be blocked by the shell 1. The shell 1 will push the arc block 58 to move toward the air box 57. The movement of the arc block 58 will squeeze the air inside the air box 57 to be discharged through the air outlet. Before the air inside the air box 57 is completely discharged, the arc block 58 cannot continue to rotate completely. The shell 1 blocks the arc block 58 from continuing to rotate, and the air outlet slowly discharges the air inside the air box 57, so that the speed of manually turning the handle 53 is limited, preventing the transmission line 55 from being pulled and damaged when the staff turns it quickly, thereby improving the protection of the device.

[0022] See also Figure 1-Figure 8 On the basis of the above embodiment, in another embodiment of the present invention, a limiting device and a fixing device are provided at the bottom of the handle 2, wherein the limiting device comprises: a storage box 61, a sliding plate 62, a transmission rod 64, a vertical rod 65 and a friction block 66, the storage box 61 is fixedly mounted on the inner wall of the outer shell 1, the sliding plate 62 is slidably mounted on the inner wall of the storage box 61, the transmission rod 64 is fixedly mounted on the bottom of the sliding plate 62, the vertical rod 65 slides through the inner and outer walls of the storage box 61, the vertical rod 65 is fixedly mounted on the bottom of the transmission rod 64, and the friction block 66 is fixedly mounted on a side of the vertical rod 65 close to the outer shell 1, so as to prevent the staff from excessively winding up the transmission line 55, which will cause the transmission line 55 to be pulled and the electrical connection between the transmission line 55 and the detection main board 54 to be disconnected, thereby improving the stability of the device during operation.

[0023] The limiting device also includes: a push rod 67, a reset block 68 and a reset rod 69. The push rod 67 slides through the inner and outer walls of the outer shell 1, the reset block 68 is fixedly installed at the end of the push rod 67 away from the storage box 61, the reset rod 69 slides through the inner and outer walls of the storage box 61, and the reset rod 69 is fixedly installed on the top of the sliding plate 62 to prevent the resistance between the friction block 66 and the winding drum 51 from being too large, which will cause the No. 2 spring 63 to be unable to reset, resulting in the inability to extend the winding drum 51, thereby improving the practicality of the device.

[0024] A No. 2 spring 63 is provided between the sliding plate 62 and the storage box 1 61 , and the push rod 67 is in contact with the reset rod 69 , and the No. 2 spring 63 drives the sliding plate 62 to reset.

[0025] The fixing device includes: a storage box 71, a slide plate 72, a telescopic rod 73, a transmission vertical rod 74 and an inclined block 75. The storage box 71 is fixedly installed on the inner wall of the outer shell 1, the slide plate 72 is slidably installed on the inner wall of the storage box 71, the telescopic rod 73 is fixedly installed on the bottom of the inner wall of the storage box 71, the slide plate 72 is fixedly installed on the top of the free end of the telescopic rod 73, the transmission vertical rod 74 slides through the inner and outer walls of the storage box 71, one end of the transmission vertical rod 74 is fixedly installed on the top of the slide plate 72, the transmission vertical rod 74 is fixedly installed on the bottom of the vertical rod 65, and the inclined block 75 is fixedly installed on the side of the slide plate 72 close to the winding drum 51 to prevent the transmission line 55 in the tightened state from being connected to the detection main board 54 when being hit, resulting in subsequent work being in a virtual power state and damaging the components.

[0026] The fixing device also includes: a cylinder 76, a transverse plate 77, a through rod 78, a positioning hook 79, a limiting hook 710, a triangular block 711 and a limiting block 712. The cylinder 76 is fixedly mounted on a side of the storage box 71 close to the detection main board 54, the transverse plate 77 is fixedly mounted on a side of the slide plate 72 away from the inclined block 75, the through rod 78 slides through the inner and outer walls of the cylinder 76, one end of the bottom of the through rod 78 is fixedly mounted on the end of the transverse plate 77 away from the slide plate 72, the positioning hook 79 is fixedly mounted on the circumferential surface of the cylinder 76, the limiting hook 710 is fixedly mounted on the top of the through rod 78, the triangular block 711 is fixedly mounted on the surface of the positioning hook 79, and the limiting block 712 is fixedly mounted on the surface of the limiting hook 710, so that the connection between the transmission line 55 and the detection main board 54 is fixed, further stabilizing the connection between the transmission line 55 and the detection main board 54 and improving the stability of the device.

[0027] The limiting block 712 is in contact with the triangular block 711 , and a No. 3 spring is provided between the through rod 78 and the cylinder 76 , and the No. 3 spring drives the through rod 78 to reset.

[0028] When the present embodiment is working, after the transmission line 55 is tightened, the transmission line 55 will push the transmission rod 64 to move toward the top, and the movement of the transmission rod 64 toward the top will drive the vertical rod 65 to move toward the top, and the movement of the vertical rod 65 toward the top will drive the friction block 66 to move toward the top, and the friction block 66 will contact the wire reel 51 when it moves toward the top. After the friction block 66 contacts the wire reel 51, the resistance between the friction block 66 and the wire reel 51 increases, so that the wire reel 51 cannot continue to rotate. Therefore, after the transmission line 55 is fully tightened, the wire reel 51 cannot continue to rotate, so as to prevent the staff from excessively winding up the transmission line 55, which will cause the transmission line 55 to be pulled, and the electrical connection between the transmission line 55 and the detection main board 54 will be disconnected, thereby improving the stability of the device during operation. The reset block 68 is pushed, and the movement of the reset block 68 will drive the push rod 67 to move in the direction of the storage box 61. The movement of the push rod 67 will contact the reset rod 69. The movement of the push rod 67 will drive the reset rod 69 to move to the bottom. The movement of the reset rod 69 to the bottom will drive the sliding plate 62 to move to the bottom. The movement of the sliding plate 62 to the bottom will drive the transmission rod 64 to move to the bottom. The movement of the transmission rod 64 to the bottom will drive the vertical rod 65 to move to the bottom. The movement of the vertical rod 65 to the bottom will drive the friction block 66 to move to the bottom. After the friction block 66 moves to the bottom, it no longer contacts the winding drum 51, so that the winding drum 51 can continue to rotate, thereby preventing the resistance between the friction block 66 and the winding drum 51 from being too large, resulting in the second spring 63 being unable to reset, resulting in the inability to extend the winding drum 51, thereby improving the practicality of the device.

[0029] The vertical rod 65 moves toward the top, which drives the transmission vertical rod 74 to move toward the top. The transmission vertical rod 74 moves toward the top, which drives the slide plate 72 to move toward the top. The slide plate 72 moves toward the top, which drives the inclined surface block 75 to move toward the top. After the inclined surface block 75 moves, it will contact the winding drum 51. When the housing 1 is hit, when the impact force is too large, the free end of the telescopic rod 73 moves toward the top, which drives the slide plate 72 to move toward the bottom. The slide plate 72 moves toward the bottom, which drives the inclined surface block 75 to move toward the bottom. The inclined surface block 75 moves toward the bottom, which drives the winding drum 51 to rotate slightly in the opposite direction. After the winding drum 51 rotates, the transmission line 55 in the tightened state will be slightly stretched to prevent the transmission line 55 in the tightened state from being hit. The line 55 will have a virtual connection with the detection main board 54, causing subsequent work to be in a virtual power state, causing damage to the components. The movement of the slide plate 72 toward the bottom will cause the cross plate 77 to move toward the bottom, and the movement of the cross plate 77 toward the bottom will drive the through rod 78 to move toward the bottom. The movement of the through rod 78 toward the bottom will drive the limit hook 710 to move toward the bottom. The movement of the limit hook 710 toward the bottom will drive the limit block 712 to move toward the bottom. After the limit block 712 moves to the bottom, it will contact the triangular block 711 and limit the positioning hook 79, so that the connection between the transmission line 55 and the detection main board 54 is fixed, further stabilizing the connection between the transmission line 55 and the detection main board 54 and improving the stability of the device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective device for a multi-channel data acquisition instrument, comprising a housing (1), characterized in that: A handle (2) is rotatably mounted on the top of the shell (1), an adjustment button (3) is provided on the surface of the shell (1), a control button (4) is provided on the surface of the shell (1), and a winding device, a limiting device and a fixing device are provided at the bottom of the handle (2); The winding device comprises: a wire reel (51), a hollow cylinder (52), a handle (53), a detection mainboard (54), a transmission line (55), a square rod (56), an air charging box (57) and a curved surface block (58), wherein the wire reel (51) is rotatably mounted on the inner wall of the outer shell (1), the hollow cylinder (52) is rotatably penetrated through the inner and outer walls of the outer shell (1), the handle (53) is fixedly mounted on one end of the hollow cylinder (52) away from the wire reel (51), the end of the hollow cylinder (52) away from the handle (53) is fixedly mounted on a side of the wire reel (51) close to the inner wall of the outer shell (1), and the detection mainboard (5 4) is fixedly mounted on the inner wall of the housing (1), the detection main board (54) is electrically connected to the control button (4), the detection main board (54) is electrically connected to the adjustment button (3), the transmission line (55) is arranged on the circumferential surface of the winding drum (51), the transmission line (55) is electrically connected to the output end of the detection main board (54), the square rod (56) is fixedly mounted on the inner wall of the hollow cylinder (52), the inflation box (57) is fixedly mounted on the surface of the square rod (56), the arc surface block (58) is slidably mounted on the inner wall of the inflation box (57), and the surface of the inflation box (57) is provided with an air outlet.

2. The protective device for a multi-channel data acquisition instrument according to claim 1, characterized in that: A first spring (59) is provided between the inflation box (57) and the arc surface block (58), and the arc surface block (58) is in contact with the housing (1).

3. The protective device for a multi-channel data acquisition instrument according to claim 2, characterized in that: The limiting device comprises: a storage box (61), a sliding plate (62), a transmission rod (64), a vertical rod (65) and a friction block (66); the storage box (61) is fixedly mounted on the inner wall of the outer shell (1); the sliding plate (62) is slidably mounted on the inner wall of the storage box (61); the transmission rod (64) is fixedly mounted on the bottom of the sliding plate (62); the vertical rod (65) slidably penetrates the inner and outer walls of the storage box (61); the vertical rod (65) is fixedly mounted on the bottom of the transmission rod (64); and the friction block (66) is fixedly mounted on a side of the vertical rod (65) close to the outer shell (1).

4. The protective device for a multi-channel data acquisition instrument according to claim 3, characterized in that: The limiting device further comprises: a push rod (67), a reset block (68) and a reset rod (69); the push rod (67) slides through the inner and outer walls of the housing (1); the reset block (68) is fixedly mounted on an end of the push rod (67) away from the storage box (61); the reset rod (69) slides through the inner and outer walls of the storage box (61); and the reset rod (69) is fixedly mounted on the top of the sliding plate (62).

5. The protective device for a multi-channel data acquisition instrument according to claim 4, characterized in that: A second spring (63) is provided between the sliding plate (62) and the storage box (61), and the push rod (67) is in contact with the reset rod (69).

6. The protective device for a multi-channel data acquisition instrument according to claim 5, characterized in that: The fixing device comprises: a second storage box (71), a slide plate (72), a telescopic rod (73), a transmission vertical rod (74) and an inclined surface block (75); the second storage box (71) is fixedly mounted on the inner wall of the outer shell (1); the slide plate (72) is slidably mounted on the inner wall of the second storage box (71); the telescopic rod (73) is fixedly mounted on the bottom of the inner wall of the second storage box (71); the slide plate (72) is fixedly mounted on the top of the free end of the telescopic rod (73); the transmission vertical rod (74) slidably penetrates the inner and outer walls of the second storage box (71); one end of the transmission vertical rod (74) is fixedly mounted on the top of the slide plate (72); the transmission vertical rod (74) is fixedly mounted on the bottom of the vertical rod (65); and the inclined surface block (75) is fixedly mounted on a side of the slide plate (72) close to the cable reel (51).

7. The protective device for a multi-channel data acquisition instrument according to claim 6, characterized in that: The fixing device further comprises: a cylinder (76), a transverse plate (77), a through rod (78), a positioning hook (79), a limiting hook (710), a triangular block (711) and a limiting block (712); the cylinder (76) is fixedly mounted on a side of the storage box (71) close to the detection main board (54); the transverse plate (77) is fixedly mounted on a side of the slide plate (72) away from the inclined block (75); the through rod (78) is slidably mounted on the inner and outer walls of the cylinder (76); one end of the bottom of the through rod (78) is fixedly mounted on an end of the transverse plate (77) away from the slide plate (72); the positioning hook (79) is fixedly mounted on the circumferential surface of the cylinder (76); the limiting hook (710) is fixedly mounted on the top of the through rod (78); the triangular block (711) is fixedly mounted on the surface of the positioning hook (79); and the limiting block (712) is fixedly mounted on the surface of the limiting hook (710).

8. The protective device for a multi-channel data acquisition instrument according to claim 7, characterized in that: The limit block (712) is in contact with the triangular block (711), and a No. 3 spring is provided between the through rod (78) and the cylinder (76).

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