Adjusting structure and chuck and fixing piece thereof

Abstract

The adjusting structure comprises a main body part and an elastic part, the main body part is provided with an adjusting hole, the adjusting hole is provided with a first hole wall and a second hole wall which are opposite, the elastic part is provided with a fixed end and a movable end which are opposite, the fixed end is connected with the first hole wall, and the movable end is connected with the second hole wall. A variable belt passing gap is formed between the movable end and the second hole wall, when the elastic part is in a reset state, the belt passing gap is smaller than the thickness of the belt, limiting sections are arranged at the two ends of the side edge, adjacent to the second hole wall, of the movable end respectively, and the limiting sections extend from the movable end to the second hole wall. After the belt passes through the belt passing gap, the belt is clamped between the movable end of the elastic part and the second hole wall of the main body part by utilizing the restoring force of the elastic part, so that the one-way clamping and fixing of the belt are realized; furthermore, the belt is kept in the belt passing gap through the limiting section, and the belt clamping reliability of the adjusting structure is improved.

Description

Technical Field

[0001] The present application relates to the technical field of daily necessities, and in particular to a clamping structure and a clamping disc and a fixing member thereof. Background Art

[0002] Adjustment structures are widely used to adjust the length of various straps due to their simplicity and practicality, such as backpack shoulder straps, safety belts, belts, elastic ropes, etc. Usually, during use, users have the need to fix the straps in one direction. For example, the user adjusts the backpack shoulder straps to a suitable length, and during use, hopes to avoid the backpack shoulder straps moving relative to the adjustment structure under the pulling of external forces, causing the backpack shoulder straps to become longer, thereby avoiding repeated readjustments. For another example, after putting on the safety belt, the user tightens it to a suitable length to fit the human body, and during use, hopes to avoid the safety belt from becoming loose under the pulling of external forces, thereby helping to reduce the risk of the user accidentally falling off the safety belt.

[0003] The current adjustment structure is mostly a Japanese-shaped buckle, the strap is passed around the horizontal bar in the middle of the Japanese-shaped buckle, and the length is adjusted by pulling the strap. However, after the length of the strap is adjusted, if a large external force is applied, the strap will move relative to the Japanese-shaped buckle, so it needs to be adjusted frequently.

[0004] Alternatively, the limiting pins on the adjustment structure cooperate with the holes arranged at intervals on the belt to achieve multi-level adjustment of the belt length. Although the limiting pins can fix the belt to prevent the belt from moving relative to the adjustment structure when subjected to external force, there are only a few lengths of the belt to choose from, and it is difficult to adjust flexibly; or re-punching holes to adjust to the appropriate length is more troublesome. Utility Model Content

[0005] One object of the present application is to provide an adjustment structure for adjusting the length of a strap and preventing the strap from moving relative to the adjustment structure when subjected to external force.

[0006] Another object of the present application is to provide a chuck used to be connected to an elastic band of a seat cushion to fix the seat cushion to a seat and suitable for adjusting the tightness of the elastic band.

[0007] Another object of the present application is to provide a fixing member, which is used to be connected to the elastic band of the seat cushion to fix the seat cushion to the seat and is suitable for adjusting the tightness of the elastic band.

[0008] In order to achieve at least one of the above purposes, the technical solution adopted in the present application is: an adjustment structure, including: a main body and an elastic part, the main body is provided with an adjustment hole, the adjustment hole has a first hole wall and a second hole wall relative to each other, the elastic part has a fixed end and a movable end relative to each other, the fixed end is connected to the first hole wall so that the elastic part can be elastically swingably connected to the main body, a variable belt gap is provided between the movable end and the second hole wall, when the elastic part is in a reset state, the belt gap is smaller than the thickness of the belt, and limiting sections are respectively provided at both ends of the side edges of the movable end adjacent to the second hole wall, and the limiting sections extend from the movable end toward the second hole wall.

[0009] Preferably, a first serration is provided on the side of the movable end adjacent to the second hole wall, the first serration is located between the two limiting sections, a second serration is provided on the second hole wall, and the first serration is matched with the second serration.

[0010] As a preference, the tooth height of the first sawtooth portion is denoted as h, 1mm≤h≤5mm, and the tooth top angle of the first sawtooth portion is denoted as α, 70°≤α≤110°.

[0011] As a preference, the two limiting segments on the movable end are bent and extended so that the ends of the two limiting segments are arranged facing each other.

[0012] Preferably, the elastic portion is provided with a connected connecting section, a transition section and a clamping section in sequence from the fixed end to the movable end, the connecting section is coplanar with the main body, the clamping section is parallel to and skewed with the connecting section, and the transition section extends obliquely to connect the connecting section and the clamping section.

[0013] As a preference, a through hole is provided in the middle area of ​​the elastic portion.

[0014] Preferably, the main body is further provided with a strip-shaped belt-passing hole suitable for the belt to pass through, and the belt-passing hole is arranged side by side with the adjustment hole and is located on a side of the adjustment hole close to the second hole wall.

[0015] In order to achieve at least one of the above purposes, the technical solution adopted in the present application is: a chuck, comprising: at least one adjustment structure as described above, the main body and the elastic part of the adjustment structure are in the form of a sheet, and a plurality of reinforcing ribs are protrudingly provided on the main body, and the reinforcing ribs include a first reinforcing rib and a second reinforcing rib, the protruding height of the second reinforcing rib is greater than the protruding height of the first reinforcing rib, and the second reinforcing rib is located on the opposite side walls of the adjustment hole.

[0016] In order to achieve at least one of the above purposes, the technical solution adopted in the present application is: a fixing member, comprising at least one adjustment structure as described above, and an extrusion portion connected to the main body of the adjustment structure; the extrusion portion comprises at least one elastically deformable first extrusion segment and at least one elastically deformable second extrusion segment, the first extrusion segment and the second extrusion segment are arranged side by side and connected at both ends, and the middle area of ​​the first extrusion segment and the middle area of ​​the second extrusion segment protrude in directions away from each other.

[0017] As a preference, the fixing member further comprises a reinforcing portion, and the reinforcing portion is protrudingly arranged on two opposite outer edges of the main body portion.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] (1) After the belt passes through the belt gap, the belt is clamped between the movable end of the elastic part and the second hole wall of the main body by utilizing the restoring force of the elastic part, and the one-way clamping and fixing of the belt is achieved by utilizing the friction force between the belt and the elastic part; further, the belt is kept in the belt gap by utilizing the limiting section, thereby improving the reliability of the adjustment structure in clamping the belt.

[0020] (2) The length of the elastic band can be adjusted through the adjustment structure on the chuck, and the elastic band can be fixed in one direction or two directions. The seat cushion can be fixed by inserting the chuck into the gap of the seat.

[0021] (3) The length of the elastic band can be adjusted through the adjustment structure on the fixing part, and the elastic band can be fixed in one direction or two directions. The fixing part is inserted into the gap of the seat to fix the seat cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view of a chuck according to some embodiments of the present application.

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3 It is a front stereoscopic structural diagram of the chuck of some embodiments of the present application.

[0025] Figure 4 It is a side perspective structural diagram of a chuck according to some embodiments of the present application.

[0026] Figure 5 is a cross-sectional view of a chuck according to some embodiments of the present application.

[0027] Figure 6 It is a front stereoscopic structural diagram of the fixing parts of some embodiments of the present application.

[0028] Figure 7 It is a back three-dimensional structural diagram of the fixing parts of some embodiments of the present application.

[0029] In the figure: 1. adjustment structure; 10. main body; 11. adjustment hole; 111. first hole wall; 112. second hole wall; 1121. second serrated portion; 113. third hole wall; 114. fourth hole wall; 115. belt gap; 116. margin gap; 12. belt hole; 13. insertion side; 14. exit side; 20. elastic portion; 21. fixed end; 22. movable end; 221. limiting section; 23. connecting section; 24. transition section; 25. pressing section; 251. first serrated portion; 26. through hole; 2. chuck; 30. reinforcing rib; 31. first reinforcing rib; 32. second reinforcing rib; 33. weak point; 3. fixing piece; 40. extrusion portion; 41. first extrusion section; 42. second extrusion section; 50. reinforcing portion. DETAILED DESCRIPTION

[0030] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] A regulatory structure 1, such as Figure 1-Figure 7As shown, it includes a main body 10 and an elastic part 20, the main body 10 is provided with an adjustment hole 11, the adjustment hole 11 has a first hole wall 111 and a second hole wall 112 relative to each other, the elastic part 20 has a fixed end 21 and a movable end 22 relative to each other, the fixed end 21 is connected to the first hole wall 111, so that the elastic part 20 can be elastically swingably connected to the main body 10, so that there is a variable belt gap 115 between the movable end 22 and the second hole wall 112, when the elastic part 20 is in a reset state, the belt gap 115 is smaller than the thickness of the belt, that is, when the belt is not installed and the elastic part 20 is not bent by external force, the belt gap 115 is smaller than the thickness of the belt. Furthermore, limiting sections 221 are respectively provided at both ends of the side edges of the movable end 22 adjacent to the second hole wall 112, and the limiting sections 221 extend from the movable end 22 toward the second hole wall 112, so that the belt can be kept in the belt gap 115 through the limiting sections 221, thereby improving the reliability of the adjustment structure 1 in clamping the belt.

[0034] For ease of description, Figure 5 As shown, the side of the strap that is convenient for passing through the adjustment hole 11 is recorded as the entry side 13 of the adjustment structure 1, and the side of the strap that is convenient for passing through the adjustment hole 11 is recorded as the exit side 14 of the adjustment structure 1. Specifically, the strap is suitable for passing through the adjustment hole 11 on the main body 10 through the belt gap 115 between the movable end 22 of the elastic part 20 and the second hole wall 112. It can be understood that, since the belt gap 115 is smaller than the thickness of the strap when the elastic part 20 is in the reset state, when the strap passes through the adjustment hole 11, the friction between the strap and the elastic part 20 will drive the movable end 22 of the elastic part 20 to swing toward the exit side 14 to expand the belt gap 115, which is suitable for the strap to pass through, thereby facilitating the adjustment of the strap length. Alternatively, the movable end 22 is manually bent toward the exit side 14 to expand the belt gap 115, thereby facilitating the strap to pass through to adjust the strap length. When the strap is adjusted, the restoring force of the elastic portion 20 drives the movable end 22 to swing toward the insertion side 13 to reduce the strap gap 115 so that the strap is clamped between the movable end 22 of the elastic portion 20 and the second hole wall 112 of the main body 10 .

[0035] Furthermore, when the strap is subjected to an external force driving it to move from the insertion side 13 to the exit side 14, the friction between the strap and the elastic part 20 drives the movable end 22 of the elastic part 20 to swing toward the exit side 14, thereby expanding the gap 115 across the strap, and the strap can be pulled to move relative to the adjustment structure 1 by a relatively small force. When the strap is subjected to an external force driving it to move in the opposite direction, that is, when it is subjected to an external force driving it to move from the exit side 14 to the insertion side 13, the friction between the strap and the elastic part 20 drives the movable end 22 of the elastic part 20 to swing toward the insertion side 13, thereby reducing the gap 115 across the strap, and the strap is clamped to prevent the strap from moving relative to the adjustment structure 1, thereby achieving unidirectional clamping and fixing of the strap.

[0036] Furthermore, Figure 1-Figure 3 As shown, the adjustment hole 11 also has a third hole wall 113 and a fourth hole wall 114 relative to each other, that is, the first hole wall 111, the second hole wall 112, the third hole wall 113 and the fourth hole wall 114 jointly define the adjustment hole 11. Further, there are margin gaps 116 between the third hole wall 113 and the elastic part 20, and between the fourth hole wall 114 and the elastic part 20, respectively, so as to reduce stress concentration and reduce the risk of tearing at the connection between the elastic part 20 and the main body 10, which is beneficial to improve the structural strength of the adjustment structure 1.

[0037] It is understandable that if Figure 1-Figure 4 As shown, the limiting segments 221 extend from both ends of the side edges on the movable end 22 adjacent to the second hole wall 112 toward the second hole wall 112, thereby making the side edges on the movable end 22 adjacent to the second hole wall 112 present a "concave" shape. When the belt is clamped between the movable end 22 and the second hole wall 112, the belt is retained between the two limiting segments 221 of the movable end 22, which helps to prevent the belt from slipping between the elastic portion 20 and the third hole wall 113, or between the elastic portion 20 and the fourth hole wall 114 during use.

[0038] Since there is a margin gap 116 between the third hole wall 113 and the elastic part 20, and between the fourth hole wall 114 and the elastic part 20, when the strap slides into the third hole wall 113 and the elastic part 20, or between the fourth hole wall 114 and the elastic part 20, the strap is subjected to a smaller clamping force or even no clamping force, which makes the strap easy to move relative to the adjustment structure 1, causing the adjustment effect of the adjustment structure 1 on the strap to fail. That is to say, in this embodiment, the strap is kept in the belt gap 115 through the limiting section 221, so as to be clamped by the movable end 22 and the second hole wall 112, which is conducive to improving the reliability of the adjustment structure 1 clamping the strap.

[0039] In at least one embodiment, Figure 1-Figure 4 As shown, the two limiting segments 221 on the movable end 22 are bent and extended so that the ends of the two limiting segments 221 are arranged to face each other, which is conducive to keeping the belt between the limiting segments 221.

[0040] In some embodiments, Figure 1-Figure 4 As shown, the side of the movable end 22 adjacent to the second hole wall 112 is provided with a first sawtooth portion 251, and the second hole wall 112 is provided with a second sawtooth portion 1121, and the first sawtooth portion 251 and the second sawtooth portion 1121 are adapted to each other. The tightening force of the movable end 22 and the second hole wall 112 on the belt is increased, thereby improving the reliability of the adjustment structure 1 in fixing the belt. In addition, it is beneficial to increase the friction between the movable end 22 and the belt.

[0041] In some embodiments, Figure 2 As shown, the tooth height of the first serration 251 is denoted as h, 1mm≤h≤5mm, and the tooth top angle of the first serration 251 is denoted as α, 70°≤α≤110°, which is conducive to causing the belt to bend and deform between the first serration 251 and the second serration 1121 along the extension direction of the first serration 251, thereby increasing the friction between the belt and the first serration 251 and the second serration 1121, which is conducive to improving the reliability of the adjustment structure 1 clamping the belt; and it is also conducive to reducing the manufacturing difficulty of the first serration 251, thereby reducing the manufacturing cost. Preferably, 1.5mm≤h≤3mm, 85°≤α≤95°.

[0042] In at least one embodiment, Figure 1-Figure 4 As shown, the tooth tops of the first serrated portion 251 and the tooth tops of the second serrated portion 1121 are both arc-shaped, which helps to reduce the damage of the first serrated portion 251 and the second serrated portion 1121 to the belt when the belt passes through the belt gap 115 between the first serrated portion 251 and the second serrated portion 1121.

[0043] In some embodiments, Figure 1-Figure 5 As shown, the elastic part 20 is provided with a connecting section 23, a transition section 24 and a pressing section 25 connected in sequence from the fixed end 21 to the movable end 22. Among them, the connecting section 23 is coplanar with the main body 10, so as to enhance the connection strength between the elastic part 20 and the main body 10, which is beneficial to improve the reliability of the adjustment structure 1. The pressing section 25 is parallel to the connecting section 23 and arranged on a different plane, which is beneficial to reduce the space occupied by the adjustment structure 1 and facilitate storage and transportation. At the same time, the movable end 22 can be more closely located on the passing side 14 of the main body 10, which is beneficial to reduce the risk of the movable end 22 of the elastic part 20 stabbing the user, making the adjustment structure 1 safer during use. The transition section 24 extends obliquely to connect the connecting section 23 and the pressing section 25.

[0044] In some embodiments, Figure 1-Figure 5 As shown, a through hole 26 is provided in the middle area of ​​the elastic part 20. It is convenient for the user to insert a finger into the through hole 26 to bend the movable end 22 of the elastic part 20 toward the outlet side 14, thereby expanding the belt gap 115, and facilitating the pulling of the belt for adjustment.

[0045] In some embodiments, Figure 1-Figure 5As shown, the main body 10 is further provided with a strip-shaped belt-passing hole 12 suitable for the belt to pass through, and the belt-passing hole 12 is arranged side by side with the adjustment hole 11 and is located on the side of the adjustment hole 11 close to the second hole wall 112. That is to say, after the belt passes through the belt-passing gap 115, it passes through the belt-passing hole 12, so that the two ends of the belt are located on the same side of the adjustment structure 1, and then the adjustment structure 1 can fix the belt more reliably, further reducing the risk of the belt moving relative to the adjustment structure 1.

[0046] A chuck 2, such as Figure 1-Figure 5 As shown, at least one of the above-mentioned adjustment structures 1 is included, the main body 10 and the elastic part 20 of the adjustment structure 1 are in sheet shape, and a plurality of reinforcing ribs 30 are protrudingly provided on the main body 10 to improve the structural strength of the chuck 2. Further, the reinforcing ribs 30 include a first reinforcing rib 31 and a second reinforcing rib 32, the protruding height of the second reinforcing rib 32 is greater than the protruding height of the first reinforcing rib 31, and the second reinforcing rib 32 is located on the opposite side walls of the adjustment hole 11.

[0047] Specifically, Figure 4 and Figure 5 As shown, a plurality of first reinforcing ribs 31 protrude from the main body 10 in an interlaced manner to improve the structural strength of the chuck 2, and the second reinforcing ribs 32 protrude from the third hole wall 113 and the fourth hole wall 114. It is understandable that during the movement of the elastic part 20, it is easy to cause the main body 10 to be pulled, resulting in the deformation of the third hole wall 113 and the fourth hole wall 114. In this embodiment, by providing the second reinforcing ribs 32 higher than the first reinforcing ribs 31 at the third hole wall 113 and the third hole wall 114, the dimensions of the third hole wall 113 and the fourth hole wall 114 along the thickness direction of the main body 10 are increased, which is conducive to further improving the structural strength of the third hole wall 113 and the fourth hole wall 114, and further conducive to reducing the risk of deformation or even damage of the third hole wall 113 and the fourth hole wall 114. In at least one embodiment, the elastic part 20 and the belt hole 12 are located between the two second reinforcing ribs 32.

[0048] It is understandable that the chuck 2 is usually used to fix the elastic band of the car seat cushion. After the chuck 2 is installed at the end of the elastic band, the chuck 2 is inserted into the gap of the car seat and fixed, so that the car seat cushion can be installed and fixed to the car seat. Further, through the adjustment structure 1 on the chuck 2, the length of the elastic band can be adjusted so that the length of the elastic band between the chuck 2 and the cushion is suitable for the cushion to fit the seat. During normal use, due to the clamping and fixing effect of the adjustment structure 1, the chuck 2 can be prevented from moving along the elastic band toward the end away from the cushion, which helps to avoid the problem that the cushion cannot fit the seat. In addition, during use, the elastic band may gradually loosen. Through the adjustment structure 1, the length of the elastic band between the chuck 2 and the cushion can be readjusted, which helps to extend the service life of the cushion and eliminates the tedious steps of replacing the elastic band.

[0049] It is worth mentioning that Figure 4 and Figure 5 As shown, a weak point 33 is formed at the intersection of the first reinforcing rib 31 and the second reinforcing rib 32, and the weak point 33 is arranged close to the two ends of the through-belt hole 12. In the case where the chuck 2 interferes with the seat and cannot be removed, the belt can be pulled forcefully, and under the joint action of the belt and the seat, the chuck 2 is broken along the connecting line of the weak points 33 at the two ends of the through-belt hole 12, and the chuck 2 can be removed from the seat by destroying the chuck 2. It can be understood that by arranging the weak point 33 close to the through-belt hole 12, the cross-sectional area of ​​the chuck 2 on the connecting line of the weak point 33 can be reduced, making it easier for the chuck 2 to be broken by pulling the belt violently.

[0050] It is understandable that the outer contour of the chuck 2 can be circular, polygonal, or other shapes, and the present application does not impose any specific limitation on this.

[0051] A fixing member 3, such as Figure 6 and Figure 7 As shown, it includes at least one of the above-mentioned adjustment structures 1, and an extrusion portion 40 connected to the main body 10 of the adjustment structure 1; the extrusion portion 40 includes at least one elastically deformable first extrusion segment 41 and at least one elastically deformable second extrusion segment 42, the first extrusion segment 41 and the second extrusion segment 42 are arranged side by side and connected at both ends, and the middle area of ​​the first extrusion segment 41 and the middle area of ​​the second extrusion segment 42 protrude in directions away from each other. Specifically, the fixing member 3 is usually used to fix the elastic band of the car seat cushion. After the fixing member 3 is installed at the end of the elastic band, the fixing member 3 is inserted into the gap of the car seat and fixed, so that the car seat cushion can be installed and fixed to the car seat.

[0052] It is understandable that the length of the elastic band can be adjusted by the adjustment structure 1 on the fixing member 3, so that the length of the elastic band between the fixing member 3 and the seat cushion is suitable for the seat cushion to fit the seat. During normal use, due to the clamping and fixing effect of the adjustment structure 1, the fixing member 3 can be prevented from moving along the elastic band toward the end away from the seat cushion, thereby effectively avoiding the problem that the seat cushion cannot fit the seat. In addition, during use, the elastic band may gradually loosen. Through the adjustment structure 1, the length of the elastic band between the fixing member 3 and the seat cushion can be readjusted, which is beneficial to extend the service life of the seat cushion and eliminates the tedious steps of replacing the elastic band.

[0053] In some embodiments, Figure 6 and Figure 7 As shown, the fixing member 3 further has a reinforcing portion 50 , which is protrudingly disposed on the outer edges of the two opposite sides of the main body 10 , which is beneficial to improving the structural strength of the main body 10 .

[0054] Specifically, the two opposite outer sides of the main body 10 are the third hole wall 113 and the fourth hole wall 114, and the reinforcing portion 50 protrudes from the third hole wall 113 and the fourth hole wall 114, so as to increase the size of the third hole wall 113 and the fourth hole wall 114 along the thickness direction of the main body 10, thereby facilitating the improvement of the structural strength of the main body 10. It is understandable that during the movement of the elastic portion 20, it is easy to cause the main body 10 to be pulled, resulting in the deformation of the third hole wall 113 and the fourth hole wall 114. In this embodiment, by providing the reinforcing portion 50 at the third hole wall 113 and the third hole wall 113, it is beneficial to further improve the structural strength of the third hole wall 113 and the fourth hole wall 114, thereby facilitating the reduction of the risk of deformation or even damage of the third hole wall 113 and the fourth hole wall 114. In at least one embodiment, the elastic portion 20 and the belt hole 12 are located between the two reinforcing portions 50.

[0055] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A regulating structure, characterized in that: include: A main body and an elastic part, wherein the main body is provided with an adjustment hole, the adjustment hole has a first hole wall and a second hole wall relative to each other, the elastic part has a fixed end and a movable end relative to each other, the fixed end is connected to the first hole wall so that the elastic part can be elastically swingably connected to the main body, a variable belt-passing gap is provided between the movable end and the second hole wall, when the elastic part is in a reset state, the belt-passing gap is smaller than the thickness of the belt, and limiting sections are respectively provided at both ends of the side edges of the movable end adjacent to the second hole wall, and the limiting sections extend from the movable end toward the second hole wall.

2. The adjustment structure according to claim 1, characterized in that: A first sawtooth portion is provided on the side of the movable end adjacent to the second hole wall, the first sawtooth portion is located between the two limiting sections, a second sawtooth portion is provided on the second hole wall, and the first sawtooth portion and the second sawtooth portion are matched.

3. The adjustment structure according to claim 2, characterized in that: The tooth height of the first sawtooth portion is denoted as h, 1mm≤h≤5mm, and the tooth top angle of the first sawtooth portion is denoted as α, 70°≤α≤110°.

4. The regulating structure according to any one of claims 1 to 3, characterized in that: The two limiting segments on the movable end are bent and extended so that the ends of the two limiting segments are arranged to face each other.

5. The regulating structure according to any one of claims 1 to 3, characterized in that: The elastic portion is provided with a connected connecting section, a transition section and a clamping section in sequence from the fixed end to the movable end. The connecting section is coplanar with the main body, the clamping section is parallel to the connecting section and is arranged on a different plane, and the transition section extends obliquely to connect the connecting section and the clamping section.

6. The regulating structure according to any one of claims 1 to 3, characterized in that: A through hole is formed in the middle area of ​​the elastic part.

7. The regulating structure according to any one of claims 1 to 3, characterized in that: The main body is also provided with a strip-shaped belt-passing hole suitable for the belt to pass through. The belt-passing hole is arranged side by side with the adjustment hole and is located on a side of the adjustment hole close to the second hole wall.

8. A chuck, characterized in that: include: At least one adjustment structure as described in any one of claims 1 to 7, wherein the main body and the elastic part of the adjustment structure are in the form of sheets, and a plurality of reinforcing ribs are protrudingly provided on the main body, and the reinforcing ribs include first reinforcing ribs and second reinforcing ribs, and the protruding height of the second reinforcing ribs is greater than the protruding height of the first reinforcing ribs; an adjustment hole is opened on the main body, and the second reinforcing ribs are located on the opposite side walls of the adjustment hole.

9. A fixing member, characterized in that: It includes at least one adjustment structure as described in any one of claims 1 to 7, and an extrusion portion connected to the main body of the adjustment structure; the extrusion portion includes at least one elastically deformable first extrusion segment and at least one elastically deformable second extrusion segment, the first extrusion segment and the second extrusion segment are arranged side by side and connected at both ends, and the middle area of ​​the first extrusion segment and the middle area of ​​the second extrusion segment protrude in directions away from each other.

10. The fixing member according to claim 9, characterized in that: The fixing member also has a reinforcing portion, and the reinforcing portion is protrudingly arranged on two opposite outer edges of the main body.

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