Portable gas analyzer

Abstract

The invention discloses a portable gas analyzer which comprises a fixing seat, the fixing seat is fixedly connected to the back of a gas analyzer body, the bottom of the fixing seat is fixedly connected with a hanging rod, the surface of the hanging rod is sleeved with an annular elastic band, the side face of the fixing seat is slidably connected with a locking piece, and the bottom of the locking piece is fixedly connected with a positioning rod. An adjusting part is rotationally connected to the interior of the positioning rod, an auxiliary part is movably inserted into the side face of the positioning rod, and the outer ring face of the auxiliary part is movably in contact with the surface of the annular elastic belt; the whole sliding seat is moved until the top block slides to the other end of the limiting edge groove, and the annular elastic belt can be pulled and adjusted, so that the elastic force of one end, far away from the back of the gas analyzer body, of the annular elastic belt becomes tight; and meanwhile, if the annular elastic band is used for a long time and the elastic force is insufficient to support and continue to be used, the two ends of the annular elastic band are directly taken down from the hanging rods and are replaced by new parts.

Description

Technical Field

[0001] This invention belongs to the technical field of gas analyzers, and specifically relates to a portable gas analyzer. Background Technology

[0002] A gas analyzer is a device used to analyze various harmful gases.

[0003] For example, a portable gas analyzer disclosed in National Patent Publication No. CN218036663U includes a limiting structure comprising a U-shaped plate. One side of the U-shaped plate is fixedly connected to the gas analyzer body. A long rod is rotatably connected to the surface of the U-shaped plate. A limiting band is wrapped around the arc surface of the long rod. The other side of the limiting band is fixedly connected to the gas analyzer body. A circular plate is fixedly connected to one end of the long rod. A fixing plate is fixedly connected to one side of the gas analyzer body relative to one side of the U-shaped plate. A screw is threadedly connected to the surface of the fixing plate. A connecting plate is rotatably connected to one end of the screw near the circular plate. A sliding plate is fixedly connected to the side of the connecting plate near the screw. A sliding hole is opened on the surface of the fixing plate. The inner wall of the surface of the fixing plate is slidably connected to the sliding plate.

[0004] However, traditional devices still have the following problems when in use: Because the other side of the limiting band is fixedly connected to the gas analyzer body, it is inconvenient to replace the limiting band after it reaches the end of its service life and becomes damaged. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a portable gas analyzer with the advantage of easy adjustment and replacement of the annular elastic band.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a portable gas analyzer, comprising a fixed base, the fixed base being fixedly connected to the back of the gas analyzer body, a hanging rod being fixedly connected to the bottom of the fixed base, an annular elastic band being sleeved on the surface of the hanging rod, a locking member being slidably connected to the side of the fixed base, a positioning rod being fixedly connected to the bottom of the locking member, an adjusting member being rotatably connected inside the positioning rod, an auxiliary member being movably inserted into the side of the positioning rod, the outer ring surface of the auxiliary member being in movable contact with the surface of the annular elastic band; and a side plate being fixedly connected to one end of the hanging rod, a limiting plate being rotatably connected inside the side plate, one end of the limiting plate passing through a limiting groove, the limiting groove being formed on the outer ring surface of the hanging rod.

[0007] Preferably, a rubber ball is fixedly connected to the back of the gas analyzer body. There are two sets of rubber balls, each set including multiple rubber balls. The multiple rubber balls are distributed at equal distances and of equal size. The two sets of rubber balls are symmetrically distributed vertically, and the fixing seat is located directly above the rubber balls.

[0008] Preferably, the hanging rod is a round rod, and two groups of rubber balls and fixing seats are fixed. The two groups of rubber balls and fixing seats are symmetrically distributed about the center of the back of the gas analyzer body, and the other end of the annular elastic band is sleeved on the outer ring surface of the other hanging rod, and the back surface of the annular elastic band is in movable contact with the rubber ball.

[0009] Preferably, the locking member includes a sliding seat and a top block. The sliding seat is a "C" - shaped plate with unequal lengths of the two side plates. A sliding groove is opened on the side surface of the fixing seat. The sliding groove is an "L" - shaped plate - shaped groove. The adjacent two side plates of the sliding seat are slidably connected in the sliding groove. The top block is fixed on the top of the sliding seat. The top block is slidably connected in the limiting edge groove. The limiting edge groove is opened on the top of the side surface of the fixing seat. And a bottom block is fixed at the bottom of the sliding groove. The bottom block slides in the bottom groove. The bottom groove is opened on the bottom of one side plate of the sliding seat.

[0010] Preferably, the positioning rod is a round rod, and an inner groove is opened inside the positioning rod. The inner groove is a round - column - shaped groove. The adjusting member includes a rotating rod, a top - holding plate, a拨动板 (I'm not sure what this should be accurately translated as, perhaps "poking plate" for now), and a damping ball. The rotating rod is a round rod. The two ends of the rotating rod are respectively rotatably connected to the side walls at both ends of the positioning rod. The top - holding plate is an oval plate. The top - holding plate is fixed on the outer ring surface of the rotating rod. The top - holding plate is rotatably connected in the inner groove. The拨动板 is fixed at the bottom of the top - holding plate. The拨动板 is a square plate. The拨动板 is rotatably connected in the rotating groove. And the rotating groove is opened on the outer ring surface of the positioning rod. Magnets are fixed on the surfaces of the rotating groove and the拨动板 that are in contact with each other. The rotating groove is communicated with the inner groove. The damping ball is fixed at the bottom of the side surface of the拨动板. Two groups of damping balls are fixed. The two groups of damping balls are symmetrically distributed about the center of the拨动板. The damping ball is in movable contact with the side wall of the rotating groove.

[0011] Preferably, the auxiliary member includes an auxiliary plate, a connecting plate, and a contact plate. A side groove communicated with the inner groove is opened on the outer ring surface of the positioning rod. The side groove is a square groove. The connecting plate is movably inserted into the side groove. The auxiliary plate and the contact plate are both arc - shaped plates. The contact plate is located inside the inner groove. And the inner ring surface of the contact plate is in movable contact with the outer ring surface of the top - holding plate. The auxiliary plate is located outside the positioning rod. The outer ring surface of the auxiliary plate is in movable contact with the surface of the annular elastic band. Damping protrusions are provided on the outer ring surface of the auxiliary plate. And elastic plates are fixedly connected between the outer ring surface of the contact plate and the inner wall of the inner groove. Two groups of elastic plates are fixed. The two groups of elastic plates are symmetrically distributed about the connecting plate.

[0012] Preferably, a side plate is fixedly connected to one end of the rotating rod facing the top block. A storage groove is opened on the top of the side plate. The limiting plate is rotatably connected to the side wall of the storage groove. The limiting plate is an arc - shaped plate. And an elastic rope is fixedly connected between the inner ring surface of the limiting plate and one side of the bottom of the storage groove.

[0013] Preferably, a plug - in groove communicated with the storage groove is opened at the bottom of the side plate. A top - holding member is movably inserted into the plug - in groove. The top - holding member and the elastic rope cooperate to limit the limiting plate.

[0014] Preferably, the abutting member includes a plugging rod, a support plate, an integral rod, a support spring, and a handle. The plugging rod is a "T"-shaped cylindrical rod, which is movably plugged in the plugging groove. The integral rod is fixed to the top of the plugging rod, the support plate is fixed to the top of the integral rod, one side of the support plate is in movable contact with the inner ring surface of the limiting plate, the support spring is fixed between the bottom of the plugging groove and the bottom of the ejector rod of the plugging rod, and the support spring is sleeved on the outer ring surface of the bottom rod of the plugging rod.

[0015] Preferably, the handle is a "C"-shaped plate, which is rotatably connected to the bottom of the plugging rod, and the handle is located at the outer bottom of the side plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The limiting plate not only limits the annular elastic band to prevent it from falling off the hanging rod, but also limits the overall sliding seat to prevent the overall movement of the sliding seat; and after the拨动板 (it should be noted that there may be an error in this term, assuming it is a certain part) rotates 90 degrees, the outer ring surface of the auxiliary plate can contact the surface of the annular elastic band, and under the action of the damping protrusions on its surface, it can enhance the clamping effect on the annular elastic band and prevent the annular elastic band from loosening during use; Move the entire sliding seat until the top block slides to the other end of the limiting edge groove, and the annular elastic band can be pulled and adjusted to make the elastic force at the end of the annular elastic band far from the back of the gas analyzer body tighter; At the same time, if the annular elastic band has been used for a long time and the elastic force is not enough to support continuous use, directly remove both ends of the annular elastic band from the hanging rod and replace it with a new one. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front schematic view of the overall structure of the present invention.

[0018] Figure 2 It is a rear schematic view of the structure of the gas analyzer body of the present invention.

[0019] Figure 3 It is a schematic view of the overall structure of the present invention.

[0020] Figure 4 It is a schematic view of the overall structure of the fixing seat of the present invention.

[0021] Figure 5 It is a schematic view of the overall structure of the sliding seat of the present invention.

[0022] Figure 6 It is a schematic view of the connection between the fixing seat and the sliding seat of the present invention.

[0023] Figure 7 It is a schematic view of the structure of the auxiliary member of the present invention.

[0024] Figure 8 It is a schematic view of the structure of the adjusting member of the present invention.

[0025] Figure 9 This is a partial structural diagram of the present invention.

[0026] Figure 10 for Figure 9 Enlarged diagram of point A in the middle.

[0027] Figure 11 This is a schematic diagram of the internal structure of the side plate of the present invention.

[0028] Figure 12 This is a schematic diagram of the connection structure between the side plate and the top support of the present invention.

[0029] Figure 13 This is a schematic diagram of the top support structure of the present invention.

[0030] Figure 14 This is a schematic diagram of the overall structure of the present invention before adjusting the annular elastic band.

[0031] Figure 15 for Figure 14 Enlarged diagram of point B in the middle.

[0032] Figure 16 for Figure 14 A side view structural diagram.

[0033] Figure 17 for Figure 16 Enlarged diagram of point C in the middle.

[0034] In the diagram: 1. Gas analyzer body; 2. Rubber ball; 3. Annular elastic band; 4. Fixed base; 5. Sliding groove; 6. Sliding seat; 7. Top block; 8. Limiting side groove; 9. Bottom block; 10. Bottom groove; 11. Hanging rod; 12. Positioning rod; 13. Inner groove; 14. Rotating groove; 15. Rotating rod; 16. Top holding plate; 17. Actuating plate; 18. Damping ball; 19. Auxiliary component; 191. Auxiliary plate; 192. Connecting plate; 193. Contact plate; 20. Side groove; 21. Side plate; 22. Limiting plate; 23. Limiting groove; 24. Storage groove; 25. Elastic rope; 26. Insertion groove; 27. Insertion rod; 28. Support plate; 29. ​​Integrated rod; 30. Support spring; 31. Handle; 32. Magnet; 33. Elastic plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1, please refer to Figures 1 to 17 This invention provides a technical solution: a portable gas analyzer, including a mounting base 4, which is fixedly connected to the back of the gas analyzer body 1. A hanging rod 11 is fixedly connected to the bottom of the mounting base 4, and an annular elastic band 3 is sleeved on the surface of the hanging rod 11. A locking member is slidably connected to the side of the mounting base 4, and a positioning rod 12 is fixedly connected to the bottom of the locking member. An adjusting member is rotatably connected inside the positioning rod 12, and an auxiliary member 19 is movably inserted into the side of the positioning rod 12. The outer ring surface of the auxiliary member 19 is in movable contact with the surface of the annular elastic band 3. A side plate 21 is fixedly connected to one end of the hanging rod 11, and a limit plate 22 is rotatably connected inside the side plate 21. One end of the positioning plate 22 passes through the limiting groove 23, which is located on the outer ring surface of the hanging rod 11. When the actuating plate 17 is turned 90 degrees, one end of the limiting plate 22 is inserted into the limiting groove 23, thereby limiting the annular elastic band 3 and preventing it from falling off the hanging rod 11. The sliding seat 6 is also limited, preventing it from moving. After the actuating plate 17 is turned 90 degrees, the outer ring surface of the auxiliary plate 191 can contact the surface of the annular elastic band 3. Under the action of the damping protrusions on its surface, the clamping effect of the annular elastic band 3 is enhanced, preventing the annular elastic band 3 from loosening during use.

[0037] Embodiment 2. On the basis of Embodiment 1, a rubber ball 2 is fixedly connected to the back of the gas analyzer body 1. There are two groups of rubber balls 2. One group of rubber balls 2 includes multiple rubber balls 2, and the multiple rubber balls 2 are distributed at equal distances and of equal size. The two groups of rubber balls 2 are symmetrically distributed up and down, and the fixing seat 4 is located directly above the rubber balls 2. The hanging rod 11 is a circular rod. Two groups of rubber balls 2 and fixing seats 4 are fixedly provided. The two groups of rubber balls 2 and the fixing seat 4 are symmetrically distributed about the center of the back of the gas analyzer body 1. The other end of the annular elastic band 3 is sleeved on the outer ring surface of the other group of hanging rods 11. The back surface of the annular elastic band 3 is in movable contact with the rubber ball 2. The locking member includes a sliding seat 6 and a top block 7. The sliding seat 6 is a "C"-shaped plate with unequal lengths of the two side plates. A sliding groove 5 is opened on the side surface of the fixing seat 4. The sliding groove 5 is an "L"-shaped plate-shaped groove. The adjacent two side plates of the sliding seat 6 are slidably connected in the sliding groove 5. The top block 7 is fixed on the top of the sliding seat 6. The top block 7 is slidably connected in the limiting edge groove 8. The limiting edge groove 8 is opened at the top of the side surface of the fixing seat 4. A bottom block 9 is fixed at the bottom of the sliding groove 5. The bottom block 9 slides in the bottom groove 10. The bottom groove 10 is opened at the bottom of one side plate of the sliding seat 6. The positioning rod 12 is a circular rod. An inner groove 13 is opened inside the positioning rod 12. The inner groove 13 is a circular cylindrical groove. The adjusting member includes a rotating rod 15, a top holding plate 16, a拨动板 17, and a damping ball 18. The rotating rod 15 is a circular rod. The two ends of the rotating rod 15 are respectively rotatably connected to the side walls at the two ends of the positioning rod 12. The top holding plate 16 is an oval plate. The top holding plate 16 is fixed on the outer ring surface of the rotating rod 15. The top holding plate 16 is rotatably connected in the inner groove 13. The拨动板 17 is fixed at the bottom of the top holding plate 16. The拨动板 17 is a square plate. The拨动板 17 is rotatably connected in the rotating groove 14. The rotating groove 14 is opened on the outer ring surface of the positioning rod 12. Magnets 32 are fixed on the surfaces of the rotating groove 14 and the拨动板 17 that are in contact with each other. The rotating groove 14 communicates with the inner groove 13. The damping ball 18 is fixed at the bottom of the side surface of the拨动板 17. There are two groups of damping balls 18. The two groups of damping balls 18 are symmetrically distributed about the center of the拨动板 17. The damping ball 18 is in movable contact with the side wall of the rotating groove 14. The auxiliary member 19 includes an auxiliary plate 191, a connecting plateA storage groove 24 is formed at the top of the side plate 21. The limiting plate 22 is rotatably connected to the side wall of the storage groove 24. The limiting plate 22 is an arc-shaped plate, and an elastic cord 25 is fixedly connected between the inner ring surface of the limiting plate 22 and one side of the bottom of the storage groove 24. A plug-in groove 26 communicating with the storage groove 24 is formed at the bottom of the side plate 21. A holding member is movably inserted into the plug-in groove 26. The holding member and the elastic cord 25 cooperate to limit the limiting plate 22. The holding member includes a plug-in rod 27, a support plate 28, an integral rod 29, a support spring 30, and a handle 31. The plug-in rod 27 is a "T"-shaped cylindrical rod and is movably inserted into the plug-in groove 26. The integral rod 29 is fixed to the top of the plug-in rod 27. The support plate 28 is fixed to the top of the integral rod 29. One side of the support plate 28 is in movable contact with the inner ring surface of the limiting plate 22. The support spring 30 is fixed between the bottom of the plug-in groove 26 and the bottom of the top rod of the plug-in rod 27 (the top rod of the plug-in rod 27 is a circular rod with a larger diameter at the top of the plug-in rod 27), and the support spring 30 is sleeved on the outer ring surface of the bottom rod of the plug-in rod 27 (the bottom rod of the plug-in rod 27 is a circular rod with a smaller diameter at the bottom of the plug-in rod 27); the handle 31 is a "C"-shaped plate, the handle 31 is rotatably connected to the bottom of the plug-in rod 27, and the handle 31 is located at the outer bottom of the side plate 21.,

[0038] In this invention, firstly, the actuating plate 17 is rotated 90 degrees, causing it to contact the other side of the rotating groove 14. Under the action of the magnet 32 ​​and the damping ball 18, the actuating plate 17 will not easily rotate. The rotation of the actuating plate 17 causes the side plate 21 to rotate, and the rotation of the side plate 21 causes one end of the limiting plate 22 to disengage from the limiting groove 23. Secondly, the handle 31 is pulled towards the bottom of the side plate 21. The surface of the handle 31 is provided with finger grooves to facilitate pulling the handle 31. The handle 31 is pulled, causing the top holding member to move as a whole. After the handle 31 is pulled to the bottom, it is rotated until both ends of the handle 31 contact the side of the side plate 21. At this point, one end of the support plate 28 will no longer be in contact with the inner ring surface of the limiting plate 22. Therefore, the limiting plate 22 loses its support and, under the tension of the elastic rope 25, the limiting plate 22 rotates and retracts into the storage groove 24. After the actuating plate 17 rotates 90 degrees, the top holding plate 16 rotates simultaneously. The outer ring surface of the top holding plate 16, which is closer to the center of the rotating rod 15, will make active contact with the inner ring surface of the contact plate 193. Therefore, under the support of the elastic plate 33, the contact plate 193 will also move closer to the rotating rod 15. The movement of the contact plate 193 drives the auxiliary plate 191 to move, so that the outer ring surface of the auxiliary plate 191 no longer makes active contact with the surface of the annular elastic band 3. Finally, move the sliding seat 6 as a whole until the top block 7 slides to the other end of the limiting groove 8, so that the annular elastic band 3 can be pulled and adjusted, so that the elasticity of the annular elastic band 3 away from the back of the gas analyzer body 1 becomes tighter. At the same time, if the annular elastic band 3 has been used for a long time and the elasticity is insufficient to support continued use, simply remove both ends of the annular elastic band 3 from the hanging rod 11 and replace it with a new one.

[0039] In Example 3, based on Example 2, after adjusting or replacing the annular elastic band 3, the sliding seat 6 is moved in the opposite direction. The outer ring surface of the positioning rod 12 will make active contact with the surface of the annular elastic band 3, such as... Figure 17 As shown, the positioning rod 12 clamps the annular elastic band 3 with the rubber ball 2, thus initially fixing the annular elastic band 3. Rotating the handle 31 prevents both ends from contacting the side of the side plate 21. Supported by the support spring 30, the support plate 28 contacts the inner ring surface of the limiting plate 22, pushing the limiting plate 22 out of the storage slot 24. Then, the actuating plate 17 is turned 90 degrees, and one end of the limiting plate 22 is inserted into the limiting slot 23. The limiting plate 22 then limits the annular elastic band 3, preventing it from falling off the hanging rod 11. Simultaneously, the sliding seat 6 is also limited, preventing it from moving. After the actuating plate 17 rotates 90 degrees, the contact state between the supporting plate 16 and the contact plate 193 is as follows: Figure 6As shown, the outer ring surface of the auxiliary plate 191 can contact the surface of the annular elastic band 3, and under the action of the damping protrusion on its surface, it can enhance the clamping effect of the annular elastic band 3 and prevent the annular elastic band 3 from loosening during use.

[0040] The working principle and usage procedure of this invention: When using the gas analyzer body 1, simply pass your arm through the annular elastic band 3; after the annular elastic band 3 has been used for a period of time and its elasticity has loosened, refer to... Figure 3 and Figure 9 and Figure 10 First, rotate the actuating plate 17 90 degrees. The actuating plate 17 will contact the other side of the rotating groove 14. Under the action of the magnet 32, the actuating plate 17 will not easily rotate. The rotation of the actuating plate 17 drives the side plate 21 to rotate, and the rotation of the side plate 21 causes one end of the limiting plate 22 to disengage from the limiting groove 23. Next, pull the handle 31 towards the bottom of the side plate 21. The pull of the handle 31 causes the top holding member to move as a whole. After the handle 31 is pulled to the bottom, rotate the handle 31 until both ends of the handle 31 contact the side of the side plate 21. At this point, one end of the support plate 28 will no longer be in contact with the inner ring surface of the limiting plate 22. Therefore, the limiting plate 22 loses its support and, under the pulling force of the elastic rope 25, the limiting plate 22 rotates and retracts into the storage groove 24. (Reference) Figure 6 After the actuating plate 17 rotates 90 degrees, the supporting plate 16 also rotates simultaneously. The outer ring surface of the supporting plate 16, which is closer to the center of the rotating rod 15, will make active contact with the inner ring surface of the contact plate 193. Therefore, under the supporting action of the elastic plate 33, the contact plate 193 will also move closer to the rotating rod 15. The movement of the contact plate 193 drives the auxiliary plate 191 to move, so that the outer ring surface of the auxiliary plate 191 no longer makes active contact with the surface of the annular elastic band 3 (please refer to...). Figure 17 When one end of the limiting plate 22 disengages from the limiting groove 23, the sliding seat 6 loses its limiting position, and the annular elastic band 3 also loses its limiting position. At this time, move the entire sliding seat 6 until the top block 7 slides to the other end of the limiting side groove 8, and the annular elastic band 3 can be pulled and adjusted so that the elastic force of the end of the annular elastic band 3 away from the back of the gas analyzer body 1 becomes tighter. At the same time, if the annular elastic band 3 has been used for a long time and the elastic force is insufficient to support continued use, simply remove both ends of the annular elastic band 3 from the hanging rod 11 and replace it with a new one. After adjusting or replacing the annular elastic band 3, move the sliding seat 6 in the reverse direction. The outer ring surface of the positioning rod 12 will then make active contact with the surface of the annular elastic band 3. Figure 17As shown, the positioning rod 12 clamps the annular elastic band 3 with the rubber ball 2, thus initially fixing the annular elastic band 3. Rotating the handle 31 prevents both ends from contacting the side of the side plate 21. Supported by the support spring 30, the support plate 28 contacts the inner ring surface of the limiting plate 22, pushing the limiting plate 22 out of the storage slot 24. Then, the toggle plate 17 is turned 90 degrees, and one end of the limiting plate 22 is inserted into the limiting slot 23. The limiting plate 22 then limits the annular elastic band 3, preventing it from falling off the hanging rod 11. Simultaneously, the sliding seat 6 is also limited, preventing it from moving.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable gas analyzer, comprising a mounting base (4), the mounting base (4) being fixedly connected to the back of the gas analyzer body (1), a hanging rod (11) being fixedly connected to the bottom of the mounting base (4), an annular elastic band (3) being sleeved on the surface of the hanging rod (11), a locking member being slidably connected to the side of the mounting base (4), and a positioning rod (12) being fixedly connected to the bottom of the locking member, characterized in that: An adjusting member is rotatably connected inside the positioning rod (12), and an auxiliary member (19) is movably inserted into the side surface of the positioning rod (12). The outer ring surface of the auxiliary member (19) is in movable contact with the surface of the annular elastic band (3); and one end of the hanging rod (11) is fixedly connected with a side plate (21). A limiting plate (22) is rotatably connected inside the side plate (21). One end of the limiting plate (22) passes through the limiting groove (23), and the limiting groove (23) is opened on the outer ring surface of the hanging rod (11).

2. The portable gas analyzer according to claim 1, characterized in that: Two rubber balls (2) are fixedly connected to the back of the gas analyzer body (1). One group of rubber balls (2) includes multiple rubber balls (2). The multiple rubber balls (2) are distributed at equal distances and with equal sizes. The two groups of rubber balls (2) are symmetrically distributed up and down, and the fixing seat (4) is located directly above the rubber balls (2).

3. A portable gas analyzer according to claim 1, characterized in that: The hanging rod (11) is a circular rod. Two groups of rubber balls (2) and fixing seats (4) are fixedly provided. The two groups of rubber balls (2) and the fixing seats (4) are symmetrically distributed about the center of the back of the gas analyzer body (1). The other end of the annular elastic band (3) is sleeved on the outer ring surface of the other group of hanging rods (11), and the back surface of the annular elastic band (3) is in movable contact with the rubber balls (2).

4. A portable gas analyzer according to claim 1, characterized in that: The locking member includes a sliding seat (6) and a top block (7). The sliding seat (6) is a "C"-shaped plate with unequal lengths of the two side plates. A sliding groove (5) is opened on the side surface of the fixing seat (4). The sliding groove (5) is an "L"-shaped plate-shaped groove. The adjacent two side plates of the sliding seat (6) are slidably connected in the sliding groove (5). The top block (7) is fixed on the top of the sliding seat (6). The top block (7) is slidably connected in the limiting edge groove (8). The limiting edge groove (8) is opened on the top of the side surface of the fixing seat (4). A bottom block (9) is fixed at the bottom of the sliding groove (5). The bottom block (9) slides in the bottom groove (10). The bottom groove (10) is opened on the bottom of one side plate of the sliding seat (6).

5. A portable gas analyzer according to claim 1, characterized in that: The positioning rod (12) is a circular rod, and an inner groove (13) is provided inside the positioning rod (12). The inner groove (13) is a circular cylindrical groove. The adjusting components include a rotating rod (15), a top holding plate (16), a toggle plate (17), and a damping ball (18). The rotating rod (15) is a circular rod, and its two ends are rotatably connected to the two end side walls of the positioning rod (12). The top holding plate (16) is an elliptical plate, and the top holding plate (16) is fixed to the outer ring surface of the rotating rod (15). The top holding plate (16) is rotatably connected to the inner groove (13). The toggle plate (17) is fixed to the top holding plate (16). At the bottom of the position, the actuating plate (17) is a square plate. The actuating plate (17) is rotatably connected in the rotating groove (14), and the rotating groove (14) is opened on the outer ring surface of the positioning rod (12). Magnets (32) are fixed on the surfaces of the rotating groove (14) and the actuating plate (17) that are in contact with each other. The rotating groove (14) is connected to the inner groove (13). The damping ball (18) is fixed on the bottom side of the actuating plate (17). There are two sets of damping balls (18). The two sets of damping balls (18) are symmetrically distributed about the center of the actuating plate (17). The damping ball (18) is in contact with the side wall of the rotating groove (14).

6. A portable gas analyzer according to claim 1, characterized in that: The auxiliary component (19) includes an auxiliary plate (191), a connecting plate (192), and a contact plate (193). The outer ring surface of the positioning rod (12) is provided with a side groove (20) that communicates with the inner groove (13). The side groove (20) is square. The connecting plate (192) is movably inserted into the side groove (20). The auxiliary plate (191) and the contact plate (193) are both arc-shaped plates. The contact plate (193) is located in the inner groove (13), and the inner ring surface of the contact plate (193) is flush with the top support. The outer ring surface of the plate (16) is in contact with the auxiliary plate (191), which is located outside the positioning rod (12). The outer ring surface of the auxiliary plate (191) is in contact with the surface of the annular elastic band (3). The outer ring surface of the auxiliary plate (191) is provided with a damping protrusion. The outer ring surface of the contact plate (193) is fixedly connected to the inner wall of the inner groove (13). There are two sets of elastic plates (33), and the two sets of elastic plates (33) are symmetrically distributed about the connecting plate (192).

7. A portable gas analyzer according to claim 5, characterized in that: The rotating rod (15) is fixedly connected to a side plate (21) at one end facing the top block (7). A storage slot (24) is provided on the top of the side plate (21). A limiting plate (22) is rotatably connected to the side wall of the storage slot (24). The limiting plate (22) is an arc-shaped plate, and an elastic rope (25) is fixedly connected between the inner ring surface of the limiting plate (22) and the bottom side of the storage slot (24).

8. A portable gas analyzer according to claim 7, characterized in that: The bottom of the side plate (21) is provided with a plug-in groove (26) that communicates with the storage groove (24). A top support is movably inserted into the plug-in groove (26), and the top support cooperates with the elastic rope (25) to limit the position of the limiting plate (22).

9. A portable gas analyzer according to claim 8, characterized in that: The holding member includes a plugging rod (27), a support plate (28), an integral rod (29), a support spring (30), and a handle (31). The plugging rod (27) is a "T"-shaped cylindrical rod, and the plugging rod (27) is movably plugged in the plugging groove (26). The integral rod (29) is fixed to the top of the plugging rod (27), the support plate (28) is fixed to the top of the integral rod (29), one side of the support plate (28) is in movable contact with the inner ring surface of the limiting plate (22), the support spring (30) is fixed between the bottom of the plugging groove (26) and the bottom of the ejector rod of the plugging rod (27), and the support spring (30) is sleeved on the outer ring surface of the bottom rod of the plugging rod (27).

10. A portable gas analyzer according to claim 9, characterized in that: The handle (31) is a "匚"-shaped plate, and the handle (31) is rotatably connected to the bottom of the plugging rod (27), and the handle (31) is located at the outer bottom of the side plate (21).

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