A portable telescopic positioning rod for measurement and its use method

Abstract

The present invention provides a portable telescopic positioning rod for measurement and a method for using the same. The portable telescopic positioning rod for measurement comprises: a fixed rod, one end of which is provided with a telescopic groove, and the interior of the fixed rod is provided with two limiting sliding grooves. The portable telescopic positioning rod for measurement provided by the present invention has two groups of first magnets that correspond to two groups of limiting magnetic plates in the initial state and adsorb to each other, so as to facilitate the adsorption of the telescopic rod in the retracted state to maintain the stability of the telescopic rod after it is retracted. The limiting magnetic plates adsorb to the two groups of second magnets, so as to ensure the stability of the telescopic rod after it is fully unfolded, and avoid loosening or contraction during the measurement process to cause unstable measurement data. The use is convenient and quick, and there is no need to manually control the movable telescopic rod. The first positioning ring and the second positioning ring facilitate the confirmation and positioning of the center positions of two circles in different positions, so as to facilitate the rapid positioning and measurement of the center distance of the two circles.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, and in particular to a portable telescopic positioning rod for measuring and a use method thereof. Background Art

[0002] The measuring locating rod is mostly used for measurement during the equipment processing. The locating rod mostly adopts a telescopic structure of a movable rod and a fixed rod to increase the measuring distance and positioning distance of the locating rod. At the same time, the retractable structure can reduce the occupied area of ​​the locating rod when not in use, which is convenient and easy to use.

[0003] In the prior art, when the existing positioning rod for measurement is telescopically adjusted, the movable rod is easily moved after being retracted inside the fixed rod, which is inconvenient to operate during actual use. During use, the movable rod is easily loosened and detached from the inside of the fixed rod, thereby affecting the stability of the actual measurement process and causing unnecessary trouble to the measurement. In addition, the positioning rod is inconvenient to locate and measure when measuring the centers of two circles.

[0004] Therefore, it is necessary to provide a portable telescopic positioning rod for measurement and a method of using the same to solve the above technical problems. Summary of the invention

[0005] The invention provides a portable telescopic positioning rod for measurement, which solves the problem that a movable rod and a fixed rod are easily loosened and inconvenient to use.

[0006] In order to solve the above technical problems, the portable telescopic positioning rod for measurement provided by the present invention comprises: a fixed rod, one end of which is provided with a telescopic slot, two limit sliding slots are provided inside the fixed rod, the other end of which is provided with an adjustment slot, and the fixed rod is provided with a first sliding hole; a measuring ruler, The bottom of the measuring ruler is fixed to the upper surface of the fixed rod; an adjusting disk, the adjusting disk is arranged inside the adjusting slot, a linkage shaft is fixedly connected at the axis of the adjusting disk, one end of the linkage shaft is fixedly connected to the linkage disk, and two first magnets are arranged on the surface of the linkage disk; a telescopic rod, the surface of the telescopic rod is slidably connected to the inner surface of the telescopic slot, both sides of the surface of the telescopic rod are fixedly connected to the limiting magnetic plates, one side of the inner wall of the two limiting sliding slots is fixedly connected to the second magnet, and a second sliding hole is provided on the telescopic rod; an extension ruler, the bottom of the extension ruler is fixed to the surface of the telescopic rod; a first sliding block, the surface of the first sliding block is slidably connected to the inner surface of the second sliding hole, and a first positioning ring is provided on the first sliding block; a C-shaped connector, the inner surface of the C-shaped connector is slidably connected to the outer surface of the fixed rod, one side of the C-shaped connector is fixedly connected to the second sliding block, the second sliding block is provided with a second positioning ring, and a locking screw is provided on the C-shaped connector.

[0007] Preferably, the two limiting sliding grooves are symmetrically distributed on both sides of the telescopic groove, and the interiors of the two limiting sliding grooves are interconnected with the interior of the telescopic groove.

[0008] Preferably, the interior of the first sliding hole is communicated with the interior of the telescopic slot, and the first sliding hole is a structure that is transparent from top to bottom.

[0009] Preferably, one end of the linkage shaft passes through the fixing rod and extends to the inside of the telescopic slot, and the surface of the linkage shaft is rotationally connected to the inner surface of the fixing rod.

[0010] Preferably, the two first magnets are symmetrically distributed on the surface of the linkage disk, and the two first magnets are both located at non-centers of the linkage disk.

[0011] Preferably, an indicator mark is fixedly connected to one end of the adjustment disk, and the position of the indicator mark matches the position of the first magnet.

[0012] Preferably, the surfaces of the two limiting magnetic plates are respectively slidably connected to the inner surfaces of the two limiting slide grooves, the surfaces of the two limiting magnetic plates are adapted to the surfaces of the two first magnets, and the surfaces of the two second magnets are adapted to the surfaces of the two limiting magnetic plates.

[0013] Preferably, the size of the second sliding hole matches the size of the first sliding hole, and the second sliding hole and the first sliding hole are on the same vertical plane, the scale on the surface of the extension ruler matches the scale on the surface of the measuring ruler, and the measuring surface of the extension ruler and the measuring surface of the measuring ruler are on the same vertical plane.

[0014] Preferably, a triangular positioning indicator groove is provided on the first positioning ring, and the indicating direction of the triangular positioning indicator groove is toward the direction of the extension ruler scale. The cross-section of the first sliding block is an I-shaped structure, and the bottom of the second sliding block extends to the interior of the first sliding hole. The size of the second positioning ring is the same as that of the first positioning ring, and the outer surface of the second positioning ring is slidably connected to the inner surface of the first sliding hole.

[0015] A method for using a portable telescopic positioning rod for measurement, comprising the following steps:

[0016] When S1 needs to adjust the measured length of the fixed rod, the adjusting disk is rotated first. The adjusting disk drives the linkage disk to rotate through the linkage shaft, and the linkage disk drives the two groups of first magnets thereon to rotate, so that the two groups of first magnets and the two groups of limit magnetic plates are misaligned and separated. At this time, the telescopic rod can be freely extended and pulled out inside the telescopic slot. After the telescopic rod is fully pulled out, the two groups of limit magnetic plates on the telescopic rod are magnetically adsorbed with the two corresponding groups of second magnets, thereby ensuring the stability of the telescopic rod after it is unfolded;

[0017] After the S2 telescopic rod is fully extended, the measurement starting point of the extension ruler on the telescopic rod corresponds to the measurement end point of the measuring ruler, thereby ensuring the continuity of the measurement data and facilitating the reading after measurement;

[0018] S3 When it is necessary to draw the distance between the centers of two circles, first fix the second positioning circle at the zero scale on the fixed rod, align the center of the second positioning circle with the center of the first circle, and move and adjust the distance between the first positioning circle and the second positioning circle according to the needs of use. The distance between the center of the first positioning circle and the center of the second positioning circle is the distance indicated by the first positioning circle, so as to quickly and easily find the center position of the required distance.

[0019] Compared with the related art, the portable telescopic positioning rod for measurement provided by the present invention has the following beneficial effects:

[0020] The present invention provides a portable telescopic positioning rod for measurement. In an initial state, two groups of first magnets correspond to two groups of limiting magnetic plates and adsorb to each other, thereby facilitating adsorption of the telescopic rod in a folded state to maintain the stability of the telescopic rod after folding. The limiting magnetic plates adsorb to the two groups of second magnets, thereby ensuring the stability of the telescopic rod after it is fully unfolded, avoiding loosening or contraction during measurement to cause unstable measurement data. The use is convenient and quick, and there is no need to manually control the movable telescopic rod. The first positioning ring and the second positioning ring facilitate confirmation and positioning of the center positions of two circles in different positions, thereby facilitating rapid positioning and measurement of the center distance of the two circles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a preferred embodiment of a portable telescopic positioning rod for measurement provided by the present invention;

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0023] Figure 3 for Figure 1 An enlarged schematic diagram of part B is shown;

[0024] Figure 4 for Figure 2 The structural schematic diagram of the linkage disk part shown;

[0025] Figure 5 for Figure 1 The structural schematic diagram of the telescopic rod part shown;

[0026] Figure 6 for Figure 1 A schematic structural diagram of the fixed rod portion shown;

[0027] Figure 7 for Figure 6 An enlarged view of point C is shown;

[0028] Figure 8 for Figure 5 A schematic structural diagram of the first sliding block portion shown;

[0029] Fig. 9 for Figure 7 A schematic structural diagram of the second sliding block part is shown.

[0030] Numbers in the figure: 1. fixing rod, 11. telescopic slot, 12. limiting slide slot, 13. adjusting slot, 14. first sliding hole, 2. measuring ruler, 3. adjusting disk, 31. linkage shaft, 32. linkage disk, 321. first magnet, 33. indicator mark, 4. telescopic rod, 41. limiting magnetic plate, 42. second magnet, 43. second sliding hole, 5. extension ruler, 6. first sliding block, 61. first positioning ring, 7. C-shaped connector, 71. second sliding block, 72. second positioning ring, 73. locking screw. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a portable telescopic positioning rod for measurement provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown; Figure 3 for Figure 1 An enlarged schematic diagram of part B is shown; Figure 4 for Figure 2 The structural schematic diagram of the linkage disk part shown; Figure 5 for Figure 1 The structural schematic diagram of the telescopic rod part shown; Figure 6 for Figure 1 A schematic structural diagram of the fixed rod portion shown; Figure 7 for Figure 6 An enlarged view of point A is shown; Figure 8 for Figure 5 A schematic structural diagram of the first sliding block portion shown; Fig. 9 for Figure 7A portable telescopic positioning rod for measurement comprises: a fixed rod 1, one end of which is provided with a telescopic slot 11, two limit slots 12 are provided inside the fixed rod 1, the other end of which is provided with an adjustment slot 13, and the fixed rod 1 is provided with a first sliding hole 14; a measuring ruler 2, the bottom of which is fixed to the upper surface of the fixed rod 1; an adjustment disk 3, which is arranged inside the adjustment slot 13, a linkage shaft 31 is fixedly connected to the axis of the adjustment disk 3, and a linkage disk 32 is fixedly connected to one end of the linkage shaft 31, Two first magnets 321 are provided on the surface of the linkage disk 32; a telescopic rod 4, the surface of the telescopic rod 4 is slidably connected to the inner surface of the telescopic slot 11, and both sides of the surface of the telescopic rod 4 are fixedly connected to limiting magnetic plates 41, and one side of the inner wall of the two limiting slide grooves 12 is fixedly connected to the second magnet 42, and the telescopic rod 4 is provided with a second sliding hole 43; an extension ruler 5, the bottom of the extension ruler 5 is fixed to the surface of the telescopic rod 4; a first sliding block 6, the surface of the first sliding block 6 is slidably connected to the inner surface of the second sliding hole 43, and the first sliding block 6 is provided with a first positioning ring 61; a C-shaped connecting piece 7, the inner surface of the C-shaped connecting piece 7 is slidably connected to the outer surface of the fixed rod 1, and one side of the C-shaped connecting piece 7 is fixedly connected to a second sliding block 71, and the second sliding block 71 is provided with a second positioning ring 72, and a locking screw 73 is provided on the C-shaped connecting piece 7.

[0033] The telescopic rod 4 can be freely telescopically adjusted inside the telescopic slot 11. When the telescopic rod 4 is completely retracted into the telescopic slot 11, the fixed rod 1 is flush with the outer surface of the telescopic rod 4.

[0034] The adjusting disk 3 is located inside the adjusting slot 13. When the adjusting disk 3 rotates, it can drive the linkage shaft 31 to rotate synchronously. When the linkage shaft 31 rotates, it can drive the linkage disk 32 to rotate synchronously. When the linkage disk 32 rotates, it can drive the two groups of first magnets 321 thereon to rotate synchronously. In the initial state, the two groups of first magnets 321 correspond to the two groups of limit magnetic plates 41 and adsorb each other, so as to facilitate the adsorption of the telescopic rod 4 in the retracted state to maintain the stability of the telescopic rod 4 after being retracted.

[0035] When the telescopic rod 4 needs to be used, it is only necessary to rotate the adjusting disk 3. The adjusting disk 3 drives the linkage disk 32 to rotate through the linkage shaft 31. When the linkage disk 32 rotates, it drives the two groups of first magnets 321 to rotate synchronously. The two groups of first magnets 321 stop when they rotate 90°, so that the first magnets 321 and the limiting magnetic plates 41 are misaligned. At this time, the first magnets 321 and the limiting magnetic plates 41 lose their magnetic attraction, and the telescopic rod 4 can be stably extended and adjusted inside the telescopic slot 11. When the telescopic rod 4 is pulled out to a fully extended state, the telescopic rod 4 drives the two groups of limiting magnetic plates 41 thereon to adsorb with the two groups of second magnets 42, thereby ensuring the stability of the telescopic rod 4 after it is fully extended, avoiding loosening or contraction during the measurement process to cause unstable measurement data. It is convenient to use and does not require manual control of the movable telescopic rod 4.

[0036] Since the second sliding hole 43 and the first sliding hole 14 are vertically distributed and do not affect each other, the second sliding block 71 inside the first sliding hole 14 and the first sliding block 6 inside the second sliding hole 43 do not affect each other. Even if the telescopic rod 4 is located inside the fixed rod 1, the first sliding block 6 on the second sliding hole 43 can still be freely adjusted in position to ensure the movable adjustment of the first sliding block 6, thereby facilitating the positioning of the center position of the first sliding block 6 and quickly confirming the distance between the centers of the first sliding block 6 and the second sliding block 71.

[0037] The two limiting sliding grooves 12 are symmetrically distributed on both sides of the telescopic groove 11 , and the interiors of the two limiting sliding grooves 12 are communicated with the interior of the telescopic groove 11 .

[0038] The limiting slide groove 12 limits the sliding of the telescopic rod 4 through the limiting magnetic plate 41 to ensure the stability of the telescopic adjustment of the telescopic rod 4.

[0039] The interior of the first sliding hole 14 is communicated with the interior of the telescopic slot 11 , and the first sliding hole 14 is a structure that is transparent from top to bottom.

[0040] The first sliding hole 14 facilitates the sliding adjustment of the outer C-shaped connecting member 7 and the second sliding block 71 .

[0041] One end of the linkage shaft 31 passes through the fixing rod 1 and extends to the inside of the telescopic slot 11 , and the surface of the linkage shaft 31 is rotationally connected to the inner surface of the fixing rod 1 .

[0042] The two first magnets 321 are symmetrically distributed on the surface of the linkage disk 32 , and the two first magnets 321 are both located at non-centers of the linkage disk 32 .

[0043] The first magnet 321 is convenient for adsorbing and fixing the retracted telescopic rod 4 to ensure the stability of the retracted telescopic rod 4. When the telescopic rod 4 is completely retracted into the retractable groove 11, the position of the first magnet 321 is adjusted to a relative position with the limiting magnetic plate 41.

[0044] An indicator mark 33 is fixedly connected to one end of the adjustment disk 3 , and the position of the indicator mark 33 matches the position of the first magnet 321 .

[0045] The indicator mark 33 facilitates the user to identify the orientation of the first magnet 321 on the linkage disk 32 , thereby facilitating identification and confirmation of the position of the first magnet 321 .

[0046] The surfaces of the two limiting magnetic plates 41 are respectively slidably connected to the inner surfaces of the two limiting slide grooves 12, the surfaces of the two limiting magnetic plates 41 are adapted to the surfaces of the two first magnets 321, and the surfaces of the two second magnets 42 are adapted to the surfaces of the two limiting magnetic plates 41.

[0047] When the telescopic rod 4 is unfolded for use, the second magnet 42 and the limiting magnetic plate 41 are attracted to each other and limit the telescopic rod 4 to ensure the stability of the telescopic rod 4 after unfolding. When the unfolded telescopic rod 4 needs to be folded, it is only necessary to press the telescopic rod 4 toward the inside of the telescopic slot 11 so that the second magnet 42 and the limiting magnetic plate 41 are separated under the action of the thrust. The telescopic rod 4 can be retracted and adjusted toward the inside of the telescopic slot 11, which is convenient to use and simple to operate.

[0048] The size of the second sliding hole 43 matches the size of the first sliding hole 14 , and the second sliding hole 43 and the first sliding hole 14 are on the same vertical plane.

[0049] The scale on the surface of the extension ruler 5 matches the scale on the surface of the measuring ruler 2 , and the measuring surface of the extension ruler 5 and the measuring surface of the measuring ruler 2 are on the same vertical plane.

[0050] A triangular positioning indicator groove is provided on the first positioning ring 61, and the indicating direction of the triangular positioning indicator groove is toward the direction of the scale of the extension ruler 5. The cross-section of the first sliding block 6 is an I-shaped structure. The bottom of the second sliding block 71 extends to the inside of the first sliding hole 14. The size of the second positioning ring 72 is the same as that of the first positioning ring 61, and the outer surface of the second positioning ring 72 is slidably connected to the inner surface of the first sliding hole 14.

[0051] The first positioning ring 61 and the second positioning ring 72 facilitate confirmation and positioning of the center positions of two circles at different positions, thereby facilitating rapid positioning and measurement of the distance between the centers of the two circles.

[0052] A method for using a portable telescopic positioning rod for measurement, comprising the following steps:

[0053] When S1 needs to adjust the measured length of the fixed rod 1, the adjusting disk 3 is rotated first. The adjusting disk 3 drives the linkage disk 32 to rotate through the linkage shaft 31. The linkage disk 32 drives the two groups of first magnets 321 thereon to rotate, so that the two groups of first magnets 321 and the two groups of limit magnetic plates 41 are misaligned and separated. At this time, the telescopic rod 4 can be freely extended and pulled out inside the telescopic slot 11. After the telescopic rod 4 is fully pulled out, the two groups of limit magnetic plates 41 on the telescopic rod 4 are magnetically adsorbed with the two groups of corresponding second magnets 42, thereby ensuring the stability of the telescopic rod 4 after it is unfolded;

[0054] S2 After the telescopic rod 4 is fully extended, the measurement starting point of the extension ruler 5 on the telescopic rod 4 corresponds to the measurement end point of the measuring ruler 2, thereby ensuring the continuity of the measurement data and facilitating the reading after the measurement;

[0055] S3 When it is necessary to draw the distance between the centers of two circles, the second positioning circle 72 is preferentially fixed at the zero scale on the fixing rod 1, and the center of the second positioning circle 72 is aligned with the center of the first circle. The distance between the center of the first positioning circle 61 and the center of the second positioning circle 72 is adjusted according to the use requirements. The distance between the center of the first positioning circle 61 and the center of the second positioning circle 72 is the distance indicated by the first positioning circle 61, so as to quickly and conveniently find the center position of the required distance.

[0056] The working principle of the portable telescopic positioning rod for measurement provided by the present invention is as follows:

[0057] When the measuring length of the fixed rod 1 needs to be adjusted, the adjusting disk 3 is rotated first, and the adjusting disk 3 drives the linkage disk 32 to rotate through the linkage shaft 31, and the linkage disk 32 drives the two groups of first magnets 321 thereon to rotate, so that the two groups of first magnets 321 and the two groups of limiting magnetic plates 41 are misaligned and disengaged, and the telescopic rod 4 can be freely extended and pulled out inside the telescopic slot 11 at this time. After the telescopic rod 4 is fully pulled out, the two groups of limiting magnetic plates 41 on the telescopic rod 4 are magnetically adsorbed with the two groups of corresponding second magnets 42, thereby ensuring the stability of the telescopic rod 4 after being unfolded;

[0058] After the telescopic rod 4 is fully extended, the measurement starting point of the extension ruler 5 on the telescopic rod 4 corresponds to the measurement end point of the measuring ruler 2, thereby ensuring the continuity of the measurement data and facilitating the reading after the measurement;

[0059] When it is necessary to draw the distance between the centers of two circles, the second positioning circle 72 is preferably fixed at the zero scale on the fixing rod 1, and the center of the second positioning circle 72 is aligned with the center of the first circle. The distance between the center of the first positioning circle 61 and the center of the second positioning circle 72 is adjusted according to the needs of use. The distance between the center of the first positioning circle 61 and the center of the second positioning circle 72 is the distance indicated by the first positioning circle 61, so as to quickly and easily find the center position of the required distance.

[0060] Compared with the related art, the portable telescopic positioning rod for measurement provided by the present invention has the following beneficial effects:

[0061] In the initial state, the two groups of first magnets 321 correspond to the two groups of limiting magnetic plates 41 and adsorb each other, so as to facilitate the adsorption of the telescopic rod 4 in the folded state to maintain the stability of the telescopic rod 4 after folding. The limiting magnetic plates 41 and the two groups of second magnets 42 are adsorbed to ensure the stability of the telescopic rod 4 after it is fully unfolded, and to avoid loosening or contraction during the measurement process, which may cause unstable measurement data. It is convenient and quick to use, and there is no need to manually control the active telescopic rod 4. The first positioning circle 61 and the second positioning circle 72 facilitate the confirmation and positioning of the center positions of two circles in different positions, so as to facilitate the rapid positioning and measurement of the center distance of the two circles.

[0062] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A portable telescopic positioning rod for measurement, characterized in that: include: A fixing rod, one end of which is provided with a telescopic slot, the interior of which is provided with two limiting sliding slots, the other end of which is provided with an adjusting slot, and the fixing rod is provided with a first sliding hole; A measuring ruler, the bottom of which is fixed to the upper surface of the fixing rod; An adjusting disk, the adjusting disk is arranged inside the adjusting slot, a linkage shaft is fixedly connected to the axis of the adjusting disk, one end of the linkage shaft is fixedly connected to the linkage disk, and two first magnets are arranged on the surface of the linkage disk; A telescopic rod, wherein the surface of the telescopic rod is slidably connected to the inner surface of the telescopic slot, both sides of the surface of the telescopic rod are fixedly connected to limit magnetic plates, one side of the inner wall of the two limit sliding slots is fixedly connected to a second magnet, and a second sliding hole is opened on the telescopic rod; An extension ruler, the bottom of which is fixed to the surface of the telescopic rod; a first sliding block, wherein a surface of the first sliding block is slidably connected to an inner surface of the second sliding hole, and a first positioning ring is provided on the first sliding block; A C-shaped connecting member, wherein the inner surface of the C-shaped connecting member is slidably connected to the outer surface of the fixing rod, a second sliding block is fixedly connected to one side of the C-shaped connecting member, a second positioning ring is provided on the second sliding block, and a locking screw is provided on the C-shaped connecting member; An indicator mark is fixedly connected to one end of the adjustment disk, and the position of the indicator mark matches the position of the first magnet; The surfaces of the two limiting magnetic plates are respectively slidably connected to the inner surfaces of the two limiting sliding grooves, the surfaces of the two limiting magnetic plates are matched with the surfaces of the two first magnets, and the surfaces of the two second magnets are matched with the surfaces of the two limiting magnetic plates; The size of the second sliding hole matches the size of the first sliding hole, and the second sliding hole and the first sliding hole are on the same vertical plane, the scale on the surface of the extension ruler matches the scale on the surface of the measuring ruler, and the measuring surface of the extension ruler and the measuring surface of the measuring ruler are on the same vertical plane; A triangular positioning indicator groove is provided on the first positioning ring, and the indicating direction of the triangular positioning indicator groove is toward the direction of the extension ruler scale. The cross-section of the first sliding block is an I-shaped structure, and the bottom of the second sliding block extends to the inside of the first sliding hole. The size of the second positioning ring is the same as that of the first positioning ring, and the outer surface of the second positioning ring is slidably connected to the inner surface of the first sliding hole.

2. The portable telescopic positioning rod for measurement according to claim 1, characterized in that: The two limiting sliding grooves are symmetrically distributed on both sides of the telescopic groove, and the interiors of the two limiting sliding grooves are communicated with the interior of the telescopic groove.

3. The portable telescopic positioning rod for measurement according to claim 1, characterized in that: The interior of the first sliding hole is communicated with the interior of the telescopic slot, and the first sliding hole is a structure that is transparent from top to bottom.

4. The portable telescopic positioning rod for measurement according to claim 1, characterized in that: One end of the linkage shaft passes through the fixing rod and extends to the inside of the telescopic slot, and the surface of the linkage shaft is rotationally connected to the inner surface of the fixing rod.

5. The portable telescopic positioning rod for measurement according to claim 1, characterized in that: The two first magnets are symmetrically distributed on the surface of the linkage disk, and the two first magnets are both located at non-centers of the linkage disk.

6. A method for using a portable telescopic positioning rod for measurement, using the portable telescopic positioning rod for measurement as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: When S1 needs to adjust the measured length of the fixed rod, the adjusting disk is rotated first. The adjusting disk drives the linkage disk to rotate through the linkage shaft, and the linkage disk drives the two groups of first magnets thereon to rotate, so that the two groups of first magnets and the two groups of limit magnetic plates are misaligned and separated. At this time, the telescopic rod can be freely extended and pulled out inside the telescopic slot. After the telescopic rod is fully pulled out, the two groups of limit magnetic plates on the telescopic rod are magnetically adsorbed with the two corresponding groups of second magnets, thereby ensuring the stability of the telescopic rod after it is unfolded; After the S2 telescopic rod is fully extended, the measurement starting point of the extension ruler on the telescopic rod corresponds to the measurement end point of the measuring ruler, thereby ensuring the continuity of the measurement data and facilitating the reading after measurement; S3 When it is necessary to draw the distance between the centers of two circles, first fix the second positioning circle at the zero scale on the fixed rod, align the center of the second positioning circle with the center of the first circle, and move and adjust the distance between the first positioning circle and the second positioning circle according to the needs of use. The distance between the center of the first positioning circle and the center of the second positioning circle is the distance indicated by the first positioning circle, so as to quickly and easily find the center position of the required distance.

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