Measuring space width adjustable laser diameter measuring instrument

Abstract

The invention relates to a measuring space width adjustable laser diameter measuring instrument which is characterized in that when the distance between a laser emitting device and a laser receiving device needs to be adjusted (namely, the space width is measured), a driving plate is driven by a linkage assembly to move downwards, so that a limiting shaft and a limiting groove of a limiting plate are separated from each other; meanwhile, after the action of the linkage assembly is released, the elastic assembly drives the telescopic plate to move upwards to be reset in the reset process, and the limiting shaft is embedded into the limiting groove of the limiting plate again to be limited; finally, the position of the laser emitting device or the laser receiving device can be conveniently adjusted.

Description

Technical Field

[0001] The invention relates to the field of laser diameter measuring instruments, and in particular to a laser diameter measuring instrument with adjustable measuring space width. Background Art

[0002] Laser diameter gauge is an online diameter measuring instrument using laser scanning, which can be widely used in industries such as cables, enameled wires, optical fibers, micro-drawn wires, various pipes and rods. The structure of the laser diameter gauge includes a base, a laser emitting device arranged on the base, a laser receiving device arranged on the base, and a placing device arranged on the front and rear sides of the base so that the object to be measured is placed in the middle of the laser emitting device and the laser receiving device.

[0003] The laser range between the laser emitting device and the receiving device is the measuring space. The object to be measured must be in the measuring space during measurement. However, if the width of the cross section of the object to be measured is too long, the width of the measuring space is small during measurement, resulting in the problem that the object to be measured is easily placed in the measuring space, or interference with the laser emitting device and the laser receiving device may occur, ultimately leading to inconvenience in use. Summary of the invention

[0004] The object of the present invention is to provide a laser diameter measuring instrument with adjustable measuring space width, which has the function of adjusting the distance between a laser emitting device and a laser receiving device to achieve the function of adjusting the measuring space width.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a laser diameter measuring instrument with adjustable measuring space width, comprising a base, a laser emitting device arranged on the base, a laser receiving device arranged on the base, and a placing device arranged on the front and rear sides of the base so that the object to be measured is placed in the middle of the laser emitting device and the laser receiving device, the laser emitting device is slidably connected to one end of the base, and the laser receiving device is slidably connected to the other end of the base, and a limiting mechanism for limiting the position of the laser emitting device or the laser receiving device is respectively arranged between the laser emitting device and the base, and between the laser receiving device and the base; the limiting mechanism includes two limiting plates respectively arranged on the side of the base and having a plurality of limiting grooves arranged in an array at the bottom, two connecting seats used to be respectively connected to the two sides of the laser emitting device or the two sides of the laser receiving device, two telescopic plates lifted and arranged on the connecting seats, two elastic components arranged between the connecting seats and the telescopic plates and driving the telescopic plates to move upward, a linkage component arranged between the two connecting seats and the two telescopic plates and used to drive the telescopic plates to move downward, and a limiting shaft arranged at the lower end of the telescopic plate and used to be embedded in the limiting groove during the upward movement.

[0006] By adopting the above technical solution, when it is necessary to adjust the distance between the laser emitting device and the laser receiving device (i.e., measure the width of the space), the linkage component drives the driving plate to move downward, so that the limiting shaft and the limiting groove of the limiting plate are separated from each other, so that the laser emitting device or the laser receiving device can slide along the base. At the same time, after releasing the action of the linkage component, during the reset process of the elastic component, the telescopic plate is driven to move upward and reset, so that the limiting shaft is re-embedded in the limiting groove of the limiting plate for limiting. Finally, it has the function of conveniently adjusting the position of the laser emitting device or the laser receiving device.

[0007] The further setting of the present invention is: the elastic component includes two guide rods arranged on the top of the telescopic plate and passing through the connecting seat, a compression spring sleeved on the part of the two guide rods passing through the connecting seat, a pressing piece sleeved on the two guide rods and pressing against the upper surfaces of the two compression springs, and an adjusting nut threadedly connected to the upper ends of the two guide rods and used to overcome the spring of the compression spring to adjust the position of the pressing piece downward.

[0008] By adopting the above technical solution, the elastic component includes a guide rod, a compression spring, a pressing piece and an adjusting nut, so as to realize the function of driving the telescopic plate to move upward; at the same time, by setting two guide rods, the stability during the telescopic process can be ensured.

[0009] The further setting of the present invention is: the linkage component includes a bracket in a "U" shape with both ends horizontally arranged on the two connecting seats, a handle arranged in the middle of the bracket and on the back side of the laser emitting device or the laser receiving device, an anti-loosening nut arranged at the end of the bracket passing through the connecting seat, two first wedge-shaped blocks arranged at both ends of the bracket, two second wedge-shaped blocks arranged at both ends of the bracket, and two third wedge-shaped blocks respectively arranged at the upper ends of the two guide rods and having two inclined surfaces; when the limiting shaft is embedded in the limiting groove, the two inclined surfaces of the first wedge-shaped block, the second wedge-shaped block and the third wedge-shaped block are respectively in contact with each other. During the process of pulling the handle outwards, the first wedge-shaped block presses the third wedge-shaped block downward and overcomes the elastic force of the elastic component, so that the limiting shaft and the limiting groove are separated from each other. During the process of pushing the handle inwards, the second wedge-shaped block presses the third wedge-shaped block downward and overcomes the elastic force of the elastic component.

[0010] By adopting the above technical solution, when it is necessary to adjust the distance between the laser emitting device and the laser receiving device (i.e., measure the width of the space), by pulling the handle outward or pushing it inward, the first wedge block or the second wedge block presses the third wedge block downward and overcomes the elastic force of the elastic component, so that the limit shaft and the limit groove are separated from each other, so that the laser emitting device or the laser receiving device can slide along the base, so as to adjust the distance between the two, which is convenient for adapting to objects to be measured with different widths; at the same time, after the distance between the two is adjusted, by canceling the external force applied to the handle, the compression spring is reset, so that the limit shaft is re-embedded in the limit groove driven by the compression spring for limit fixation, which has the effect of facilitating adjustment.

[0011] The present invention is further configured as follows: a telescopic groove is provided on the connecting seat for the telescopic plate to be inserted and telescoped, notches are provided at the bottom of both sides of the telescopic plate, an adsorption component is provided between the telescopic plate and the connecting seat for realizing adsorption when the telescopic plate moves downward to an extreme state, the adsorption component includes two plastic plates arranged at the lower end of the connecting seat and a flexible suction cup arranged at the notch of the telescopic plate; when the telescopic plate moves downward to an extreme state through the action of the linkage component, the flexible suction cup is adsorbed on the plastic plate for fixation, so that the compression spring first maintains a compressed state, and then gradually overcomes the adsorption effect of the flexible suction cup and then resets.

[0012] By adopting the above technical scheme, in the process of pulling the handle outward or pushing it inward, the elastic component can be driven to move downward so that the limit shaft and the limit groove are separated from each other, thereby realizing the movement of the laser emitting device and the laser receiving device. However, if the relative distance between the handle (after being pulled outward or pushed inward) and the laser emitting device and the laser receiving device is not maintained during the movement, the limit shaft will be re-embedded in the limit groove for limiting, thereby affecting the movement of the laser emitting device and the laser receiving device; at this time, a plastic plate and a flexible suction cup are arranged, so that when the telescopic plate moves downward to the limit state through the action of the linkage component, the flexible suction cup is adsorbed on the plastic plate for fixation, so that the compression spring first maintains a compressed state, and then gradually overcomes the adsorption effect of the flexible suction cup and resets, which has the effect of facilitating the movement of the laser emitting device and the laser receiving device in the process of the compression spring maintaining a compressed state.

[0013] The present invention is further configured as follows: the base includes a middle section, two adjustment sections plugged into and arranged at both ends of the middle section, and a fixing nut arranged between the adjustment section and the middle section; the laser emitting device and the laser receiving device are respectively slidably connected to the two adjustment sections; and the shelf device is arranged on the middle section.

[0014] By adopting the above technical solution, the base includes a middle section and two adjustment sections. By replacing the lengths of the two adjustment sections, the sliding stroke of the laser reflecting device and the laser receiving device can be adjusted, which is convenient for use. Adjustment sections of different lengths can be installed according to different usage conditions, and then the measurement space width can be adjusted within the length range of the adjustment section.

[0015] The present invention is further configured as follows: the shelf device comprises two mounting brackets respectively arranged on both sides of the middle section, and two guide wheels respectively arranged on the mounting brackets.

[0016] The present invention is further configured as follows: the operation steps of adjusting the width of the measuring space by the laser diameter measuring instrument include the following:

[0017] S1: When the width of the measuring space needs to be increased, the laser emitting device and the laser receiving device need to be moved downward and away from each other. By pulling the handle outward, the first wedge block presses the third wedge block downward and overcomes the elastic force of the elastic component, the limiting shaft and the limiting groove of the limiting plate are separated from each other, and the flexible suction cup is adsorbed on the plastic plate to maintain the adsorption effect. The laser emitting device and the laser receiving device are pushed inward to the required position. After adjustment, the elastic component gradually overcomes the force of the flexible suction cup, so that the flexible suction cup and the plastic plate are gradually separated. After the elastic component is reset, it drives the limiting shaft to be re-embedded in the limiting groove of the limiting plate for limiting;

[0018] S2: When the width of the measuring space needs to be reduced, the laser emitting device and the laser receiving device need to be moved downward and closer to each other. By pushing the handle inward, the second wedge block presses the third wedge block downward and overcomes the elastic force of the elastic component, the limit shaft and the limit groove of the limit plate are separated from each other, and the flexible suction cup is adsorbed on the plastic plate to maintain the adsorption effect. The laser emitting device and the laser receiving device are pushed inward to the required position. After adjustment, the elastic component gradually overcomes the force of the flexible suction cup, so that the flexible suction cup and the plastic plate are gradually separated. After the elastic component is reset, it drives the limit shaft to be re-embedded in the limit groove of the limit plate for limiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the right side of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the limiting mechanism in the present invention.

[0022] 1. Base; 11. Middle section; 12. Adjustment section; 13. Fixing nut; 2. Laser emitting device; 3. Laser receiving device; 4. Shelving device; 41. Mounting bracket; 42. Guide wheel; 5. Limiting mechanism; 51. Limiting plate; 511. Limiting groove; 52. Connecting seat; 521. Telescopic groove; 53. Telescopic plate; 531. Notch; 54. Elastic component; 541. Guide rod; 542. Compression spring; 543. Pressing sheet; 544. Adjusting nut; 55. Linkage component; 551. Bracket; 552. Handle; 553. Anti-slip nut; 553. First wedge block; 554. Second wedge block; 555. Third wedge block; 56. Limiting shaft; 57. Adsorption component; 571. Plastic plate; 572. Flexible suction cup. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] Embodiment: A laser diameter gauge with adjustable measuring space width, as shown in the figure, includes a base 1, a laser emitting device 2 arranged on the base 1, a laser receiving device 3 arranged on the base 1, a placing device 4 arranged on the front and rear sides of the base 1 so that the object to be measured is placed in the middle of the laser emitting device 2 and the laser receiving device 3, the laser emitting device 2 is slidably connected to one end of the base 1, the laser receiving device 3 is slidably connected to the other end of the base 1, and a limiting mechanism 5 for limiting the position of the laser emitting device 2 or the laser receiving device 3 is respectively arranged between the laser emitting device 2 and the base 1 and between the laser receiving device 3 and the base 1.

[0025] like Figure 1 and Figure 2 As shown, the base 1 includes a middle section 11, two adjustment sections 12 plugged and arranged at both ends of the middle section 11, and a fixing nut 13 arranged between the adjustment section 12 and the middle section 11. The laser emitting device 2 and the laser receiving device 3 are respectively slidably connected to the two adjustment sections 12, the limit plate 51 is installed on the adjustment section 12, and the shelf device 4 is arranged on the middle section 11. The shelf device 4 includes two mounting brackets 41 respectively arranged on both sides of the middle section 11, and two guide wheels 42 respectively arranged on the mounting brackets 41.

[0026] like Figures 1 to 3As shown, the limit mechanism 5 includes two limit plates 51 respectively arranged on the side surface of the base 1 and having a plurality of limit slots 511 arranged in an array at the bottom, two connecting seats 52 respectively used for connecting to both sides of the laser emitting device 2 or both sides of the laser receiving device 3, two telescopic plates 53 arranged to be lifted and lowered on the connecting seats 52, two elastic components 54 arranged between the connecting seats 52 and the telescopic plates 53 and driving the telescopic plates 53 to move upward, a linkage component 55 arranged between the two connecting seats 52 and the two telescopic plates 53 and used for driving the telescopic plates 53 to move downward, and a limit shaft 56 arranged at the lower end of the telescopic plate 53 and used for being embedded in the limit slots 511 during upward movement.

[0027] As Figure 2 and Figure 3 As shown, the elastic component 54 includes two guide rods 541 arranged at the top of the telescopic plate 53 and passing through the connecting seat 52, a compression spring 542 sleeved on the part of the two guide rods 541 passing through the connecting seat 52, a pressing piece 543 sleeved on the two guide rods 541 and pressing against the upper surface of the two compression springs 542, and an adjusting nut 544 threadedly connected to the upper ends of the two guide rods 541 and used for overcoming the spring force of the compression spring 542 to adjust the position of the pressing piece 543 downward.

[0028] As Figure 2 and Figure 3 As shown, the linkage component 55 includes a bracket 551 in a "U" shape with both ends horizontally arranged on the two connecting seats 52, a handle 552 arranged in the middle of the bracket 551 and on the back side of the laser emitting device 2 or the laser receiving device 3, an anti -脱 nut 553 arranged at the end of the bracket 551 passing through the connecting seat 52, two first wedge - shaped blocks 553 arranged at both ends of the bracket 551, two second wedge - shaped blocks 554 arranged at both ends of the bracket 551, and two third wedge - shaped blocks 555 respectively arranged at the upper ends of the two guide rods 541 and having two inclined surfaces; when the limit shaft 56 is embedded in the limit slots 511, the two inclined surfaces of the first wedge - shaped block 553, the second wedge - shaped block and the third wedge - shaped block 555 respectively抵触 each other. During the process of pulling the handle 552 outwards, the first wedge - shaped block 553 presses the third wedge - shaped block 555 downward and overcomes the elastic force of the elastic component 54, so that the limit shaft 56 and the limit slots 511 are separated from each other. During the process of pushing the handle 552 inwards, the second wedge - shaped block 554 presses the third wedge - shaped block 555 downward and overcomes the elastic force of the elastic component 54.

[0029] As Figure 2 and Figure 3As shown, the base 1 is provided with a telescopic groove 521 for the telescopic plate 53 to be inserted and telescoped, and notches 531 are provided at the bottom of both sides of the telescopic plate 53. An adsorption component 57 is provided between the telescopic plate 53 and the base 1 for realizing adsorption when the telescopic plate 53 moves downward to the limit state. The adsorption component 57 includes two connecting seats 52 arranged at the lower end of the base 1, a plastic plate 571 arranged on the connecting seat 52, and a flexible suction disk 572 arranged at the notch 531 of the telescopic plate 53; when the telescopic plate 53 moves downward to the limit state through the action of the linkage assembly 55, the flexible suction disk 572 is adsorbed on the plastic plate 571 for fixation, so that the compression spring 542 first maintains a compressed state, and then gradually overcomes the adsorption effect of the flexible suction disk 572 and then resets.

[0030] The operating steps for adjusting the width of the measuring space of the laser diameter gauge include the following: S1: When the width of the measuring space needs to be increased, the laser emitting device 2 and the laser receiving device 3 need to be moved downward and away from each other, by pulling the handle 552 outward, the first wedge block 553 presses the third wedge block 555 downward and overcomes the elastic force of the elastic component 54, the limiting shaft 56 and the limiting groove 511 of the limiting plate 51 are separated from each other, and the flexible suction disk 572 is adsorbed on the plastic plate 571 to maintain the adsorption effect, and the laser emitting device 2 and the laser receiving device 3 are pushed inward to the required position. After adjustment, the elastic component 54 gradually overcomes the force of the flexible suction disk 572, so that the flexible suction disk 572 and the plastic plate 571 are gradually separated. After the elastic component 54 is reset, it drives the limiting shaft 56 to be re-embedded in the limiting groove 511 of the limiting plate 51 for limiting. S2: When the width of the measuring space needs to be reduced, the laser emitting device 2 and the laser receiving device 3 need to be moved downwardly toward each other, and the handle 552 is pushed inward, and the second wedge block 554 presses the third wedge block 555 downwardly and overcomes the elastic force of the elastic component 54, and the limiting shaft 56 and the limiting groove 511 of the limiting plate 51 are separated from each other, and the flexible suction disk 572 is adsorbed on the plastic plate 571 to maintain the adsorption effect, and the laser emitting device 2 and the laser receiving device 3 are pushed inward to the desired position. After adjustment, the elastic component 54 gradually overcomes the force of the flexible suction disk 572, so that the flexible suction disk 572 and the plastic plate 571 are gradually separated, and after the elastic component 54 is reset, it drives the limiting shaft 56 to be re-embedded in the limiting groove 511 of the limiting plate 51 for limiting.

[0031] Implementation effect: When it is necessary to adjust the distance between the laser emitting device 2 and the laser receiving device 3 (i.e., measure the width of the space), the driving plate is driven downward by the linkage component 55 to separate the limiting shaft 56 and the limiting groove 511 of the limiting plate 51 from each other, so that the laser emitting device 2 or the laser receiving device 3 can slide along the base 1. At the same time, after releasing the action of the linkage component 55, the elastic component 54 drives the telescopic plate 53 to move upward and reset during the resetting process, so that the limiting shaft 56 is re-embedded in the limiting groove 511 of the limiting plate 51 for limiting, which finally facilitates the adjustment of the position of the laser emitting device 2 or the laser receiving device 3.

[0032] The elastic component 54 includes a guide rod 541, a compression spring 542, a pressing plate 543 and an adjusting nut 544, so as to achieve the function of driving the telescopic plate 53 to move upward; at the same time, by setting two guide rods 541, the stability during the telescopic process can be ensured. When it is necessary to adjust the distance between the laser emitting device 2 and the laser receiving device 3 (i.e., measure the width of the space), by pulling the handle 552 outward or pushing it inward, the first wedge block 553 or the second wedge block 554 presses the third wedge block 555 downward and overcomes the elastic force of the elastic component 54, so that the limiting shaft 56 and the limiting groove 511 are separated from each other, so that the laser emitting device 2 or the laser receiving device 3 can slide along the base 1, so as to adjust the distance between the two, which is convenient for adapting to objects to be measured of different widths; at the same time, after the distance between the two is adjusted, by canceling the external force applied to the handle 552, the compression spring 542 is reset, so that the limiting shaft 56 is re-embedded in the limiting groove 511 driven by the compression spring 542 for limiting and fixing, which has the effect of facilitating adjustment.

[0033] In the process of pulling the handle 552 outward or pushing it inward, the elastic component 54 can be driven to move downward so that the limit shaft 56 and the limit groove 511 are separated from each other, thereby realizing the movement of the laser emitting device 2 and the laser receiving device 3. However, if the relative distance between the handle 552 (after being pulled outward or pushed inward) and the laser emitting device 2 and the laser receiving device 3 is not maintained during the movement, the limit shaft 56 will be re-embedded in the limit groove 511 for limiting, thereby affecting the movement of the laser emitting device 2 and the laser receiving device 3. At this time, by setting the plastic plate 571 and the flexible suction disk 572, when the telescopic plate 53 moves downward to the limit state through the action of the linkage component 55, the flexible suction disk 572 is adsorbed on the plastic plate 571 for fixation, so that the compression spring 542 first maintains a compressed state, and then gradually overcomes the adsorption effect of the flexible suction disk 572 and then resets. In the process of the compression spring 542 maintaining a compressed state, it has the function of facilitating the movement of the laser emitting device 2 and the laser receiving device 3.

[0034] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A laser diameter measuring instrument with adjustable measuring space width, comprising a base (1), a laser emitting device (2) arranged on the base (1), a laser receiving device (3) arranged on the base (1), and a placing device (4) arranged on the front and rear sides of the base (1) so that the object to be measured is placed in the middle of the laser emitting device (2) and the laser receiving device (3), characterized in that: The laser emitting device (2) is slidably connected to one end of the base (1), and the laser receiving device (3) is slidably connected to the other end of the base (1). A limiting mechanism (5) for restricting the position of the laser emitting device (2) or the laser receiving device (3) is respectively provided between the laser emitting device (2) and the base (1), and between the laser receiving device (3) and the base (1); the limiting mechanism (5) includes two limiting plates (51) respectively arranged on the side surface of the base (1) and having a plurality of arrayed limiting grooves (511) at the bottom, two connecting seats (52) for respectively connecting to both sides of the laser emitting device (2) or both sides of the laser receiving device (3), two telescopic plates (53) vertically arranged on the connecting seats (52), two elastic components (54) arranged between the connecting seats (52) and the telescopic plates (53) and driving the telescopic plates (53) to move upward, a linkage component (55) arranged between the two connecting seats (52) and the two telescopic plates (53) and used for driving the telescopic plates (53) to move downward, and a limiting shaft (56) arranged at the lower end of the telescopic plate (53) and used for being embedded in the limiting groove (511) during the upward movement process.

2. The laser diameter measuring instrument with adjustable measuring space width according to claim 1, characterized in that: The elastic component (54) includes two guide rods (541) arranged on the top of the telescopic plate (53) and passing through the connecting seat (52), a compression spring (542) sleeved on the part of the two guide rods (541) passing through the connecting seat (52), a pressing piece (543) sleeved on the two guide rods (541) and pressing against the upper surface of the two compression springs (542), and an adjusting nut (544) threadedly connected to the upper ends of the two guide rods (541) and used for overcoming the spring of the compression spring (542) to adjust the position of the pressing piece (543) downward.

3. The laser diameter measuring instrument with adjustable measuring space width according to claim 2, characterized in that: The linkage component (55) includes a bracket (551) in a "U" shape with both ends horizontally arranged on the two connecting seats (52), a handle (552) arranged in the middle of the bracket (551) and on the back side of the laser emitting device (2) or the laser receiving device (3), a locknut (553) arranged at the end of the bracket (551) passing through the connecting seat (52), two first wedge-shaped blocks (553) arranged at both ends of the bracket (551), two second wedge-shaped blocks (554) arranged at both ends of the bracket (551), and two third wedge-shaped blocks (555) respectively arranged at the upper ends of the two guide rods (541) and having two inclined surfaces; when the limiting shaft (56) is embedded in the limiting groove (511), the two inclined surfaces of the first wedge-shaped block (553), the second wedge-shaped block and the third wedge-shaped block (555) are respectively in contact with each other. During the process of pulling the handle (552) outward, the first wedge-shaped block (553) presses the third wedge-shaped block (555) downward and overcomes the elastic force of the elastic component (54), so that the limiting shaft (56) and the limiting groove (511) are separated from each other. During the process of pushing the handle (552) inward, the second wedge-shaped block (554) presses the third wedge-shaped block (555) downward and overcomes the elastic force of the elastic component (54).

4. The laser diameter measuring instrument with adjustable measuring space width according to claim 3, characterized in that: The connecting seat (52) is provided with a telescopic groove (521) for the telescopic plate (53) to be inserted and then telescoped, and notches (531) are provided at the bottom of both sides of the telescopic plate (53). An adsorption component (57) is provided between the telescopic plate (53) and the connecting seat (52) for achieving adsorption when the telescopic plate (53) moves downward to an extreme state, and the adsorption component (57) comprises two plastic plates (571) arranged at the lower end of the connecting seat (52) and a flexible suction (572) disc arranged at the notch (531) of the telescopic plate (53); when the telescopic plate (53) moves downward to an extreme state through the action of the linkage assembly (55), the flexible suction (572) disc is adsorbed on the plastic plate (571) for fixing, so that the compression spring (542) first maintains a compressed state, and then gradually overcomes the adsorption effect of the flexible suction (572) disc and resets.

5. The laser diameter measuring instrument with adjustable measuring space width according to claim 1, characterized in that: The base (1) comprises a middle section (11), two adjustment sections (12) inserted at both ends of the middle section (11), and a fixing nut (13) arranged between the adjustment sections (12) and the middle section (11); the laser emitting device (2) and the laser receiving device (3) are respectively slidably connected to the two adjustment sections (12); and the shelf device (4) is arranged on the middle section (11).

6. The laser diameter measuring instrument with adjustable measuring space width according to claim 1, characterized in that: The shelf device (4) comprises two mounting brackets (41) respectively arranged on both sides of the middle section (11), and two guide wheels (42) respectively arranged on the mounting brackets (41).

7. The laser diameter measuring instrument with adjustable measuring space width according to claim 1, characterized in that: The operation steps of adjusting the measurement space width of the laser diameter measuring instrument include the following: S1: When the width of the measuring space needs to be increased, the laser emitting device (2) and the laser receiving device (3) need to be moved downward and away from each other. By pulling the handle (552) outward, the first wedge-shaped block (553) presses the third wedge-shaped block (555) downward and overcomes the elastic force of the elastic component (54), the limiting shaft (56) and the limiting groove (511) of the limiting plate (51) are separated from each other, and the flexible suction (572) disc is adsorbed on the plastic plate (571) to maintain the adsorption effect, and the laser emitting device (2) and the laser receiving device (3) are pushed inward to the required position. After adjustment, the elastic component (54) gradually overcomes the force of the flexible suction (572) disc, so that the flexible suction (572) disc and the plastic plate (571) are gradually separated. After the elastic component (54) is reset, it drives the limiting shaft (56) to be re-embedded in the limiting groove (511) of the limiting plate (51) for limiting. S2: When the width of the measuring space needs to be reduced, the laser emitting device (2) and the laser receiving device (3) need to be moved downwardly toward each other. By pushing the handle (552) inwardly, the second wedge-shaped block (554) presses the third wedge-shaped block (555) downwardly and overcomes the elastic force of the elastic component (54), the limiting shaft (56) and the limiting groove (511) of the limiting plate (51) are separated from each other, and the flexible suction (572) disc is adsorbed on the plastic plate (571) to maintain the adsorption effect. The laser emitting device (2) and the laser receiving device (3) are pushed inwardly to the desired position. After adjustment, the elastic component (54) gradually overcomes the force of the flexible suction (572) disc, so that the flexible suction (572) disc and the plastic plate (571) are gradually separated. After the elastic component (54) is reset, it drives the limiting shaft (56) to be re-embedded in the limiting groove (511) of the limiting plate (51) for limiting.

Images