CN220675599U - Chair back bending radian adjusting system and chair - Google Patents
Chair back bending radian adjusting system and chair Download PDFInfo
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- CN220675599U CN220675599U CN202322462974.9U CN202322462974U CN220675599U CN 220675599 U CN220675599 U CN 220675599U CN 202322462974 U CN202322462974 U CN 202322462974U CN 220675599 U CN220675599 U CN 220675599U
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- 238000005452 bending Methods 0.000 title claims abstract description 74
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 238000013459 approach Methods 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000037237 body shape Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 208000008035 Back Pain Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 208000019804 backache Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The utility model relates to the technical field of seats, in particular to a chair back bending radian adjusting system and a chair, wherein the chair back bending radian adjusting system comprises a back bending piece, a sliding connecting piece, a pulling assembly and a positive and negative tooth transmission screw rod; the front and back teeth transmission screw rod is rotated, so that the front and back teeth transmission screw rod drives the pulling connecting piece to synchronously approach or separate from the connecting plate along the length direction of the front and back teeth transmission screw rod, one end of the pulling connecting piece is hinged with the sliding connecting piece, and the other end of the pulling connecting piece is hinged with the front and back teeth transmission screw rod, so that the sliding connecting piece is driven to slide up and down along the connecting plate, the bending radian of the backrest bending piece is changed, the chair backrest bending radian can be adjusted to stop rotating at any radian, and therefore, the size of the radian can be any value within a specified range, the chair is suitable for users of different sizes, thereby enabling the waist and back body shapes of the users to adapt to the bending radian of the backrest structure, improving riding comfort, and being wider in application range.
Description
Technical Field
The utility model relates to the technical field of chairs, in particular to a chair back bending radian adjusting system and a chair.
Background
In order to increase riding comfort, the chair back is often provided with a backrest which can enable the waist and the back of a human body to be forced, so that the chair back can provide supporting and buffering functions when bearing the weight of the human body.
The existing backrest structure is usually fixed on a chair back, the bending radian of the backrest can not be adjusted only in a simpler up-down mode, however, different user body types have differences, the bending radian of the backrest on the same chair is not necessarily suitable for different people, if the user waist and back body types cannot adapt to the arc curvature of the backrest structure, the phenomenon of waist and back ache easily occurs after sitting for a long time, and the permanent injuries such as spine deformation are more likely to be caused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The utility model provides a chair back bending radian adjusting system and a chair, and accordingly the problems in the background technology are effectively solved.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a chair back curvature adjustment system, comprising:
the side, which protrudes, of the backrest bending piece faces the back of the user, and the side, which is far away from the protruding, of the backrest bending piece is provided with a connecting plate which is arranged on the chair rod;
one end of the sliding connecting piece is slidably arranged on the connecting plate, and the other end of the sliding connecting piece is arranged at the bottom of the backrest bending piece;
the pulling assembly comprises a positive and negative tooth transmission screw rod arranged along the width direction of the connecting plate and a pulling connecting piece symmetrically arranged along the length direction of the connecting plate, the positive and negative tooth transmission screw rod drives the pulling connecting piece to synchronously approach or separate from the connecting plate along the length direction of the positive and negative tooth transmission screw rod, one end of the pulling connecting piece is hinged with the sliding connecting piece, the other end of the pulling connecting piece is hinged with the positive and negative tooth transmission screw rod, and the pulling assembly is used for driving the sliding connecting piece to slide up and down so as to change the bending radian of the backrest bending piece.
Further, a sliding block is arranged between the pulling connecting piece and the positive and negative tooth transmission screw rod, the sliding block is arranged on the positive and negative tooth transmission screw rod, and the positive and negative tooth transmission screw rod rotates to drive the sliding block to slide along the length direction of the positive and negative tooth transmission screw rod.
Further, the slider both ends are equipped with the rotation axis, the pulling connecting piece is close to the one end of slider is equipped with L type groove, one section in L type groove with pulling connecting piece width direction is parallel, another section in L type groove with pulling connecting piece length direction is parallel, the end in L type groove is equipped with the circular arc, the rotation axis is located in the circular arc.
Further, a long chute is formed in one side, close to the connecting plate, of the sliding connecting piece, a guide piece is arranged on the connecting plate, and the long chute slides along the guide piece.
Further, one end of the sliding connecting piece, which is close to the backrest bending piece, is provided with a connecting pin, the connecting pin is provided with a through hole, the bottom of the backrest bending piece is provided with a groove, the connecting pin is arranged in the groove, a U-shaped groove is formed in the width direction of the bottom of the backrest bending piece, a pin is arranged between the U-shaped groove and the through hole, and a baffle is arranged at the opening of the U-shaped groove.
Further, along connecting plate width direction level sets up the chevron shape mount, chevron shape mount symmetry is equipped with L type link, be equipped with the connecting block on the bottom surface of L type link, the connecting block is located respectively positive and negative tooth transmission lead screw's both ends, L type link with be equipped with the mounting between the connecting block.
Further, be equipped with the stopper in the middle of positive and negative tooth transmission lead screw, the stopper both sides are equipped with first diameter section and second diameter section in proper order, two be equipped with positive tooth screw thread and reverse tooth screw thread on the second diameter section respectively, the second diameter section is less than first diameter section, first diameter section is located in the connecting block, the connecting block is kept away from one side of first diameter section is equipped with the nut.
Further, one end of the positive and negative tooth transmission screw rod is provided with an adjusting knob, and the adjusting knob is provided with anti-skid threads.
The utility model also comprises a chair, which comprises a backrest assembly, a chair seat, chair legs, a chair rod and the chair back bending radian adjusting system, wherein the chair back bending radian adjusting system is arranged on the backrest assembly, and the backrest assembly, the chair seat and the chair legs are sequentially arranged on the chair rod from top to bottom.
Further, one end of the chair rod, which is close to the backrest assembly, is provided with a telescopic structure for adjusting the longitudinal position of the backrest assembly on the chair rod.
The beneficial effects of the utility model are as follows: the utility model is characterized in that a backrest bending piece, a sliding connecting piece, a pulling component and a positive and negative tooth transmission screw rod are arranged; through rotating positive and negative tooth transmission lead screw, make positive and negative tooth transmission lead screw drive pulling connecting piece along positive and negative tooth transmission lead screw length direction synchronous reverse motion, because pulling connecting piece one end is articulated with sliding connection spare, the other end is articulated with positive and negative tooth transmission lead screw, so drive sliding connection spare and slide from top to bottom along the connecting plate, thereby change the crooked radian of back crooked piece, because the crooked radian of chair back adjusts can stop rotating at arbitrary radian, therefore the size of radian can be arbitrary value in the regulation scope, so be fit for different body types user and use, thereby make the crooked radian of user's waist back body type adaptation back structure has improved the comfort of taking, application scope is wider.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic view of a chair;
fig. 2 is an enlarged view at a in fig. 1;
FIG. 3 is a schematic view of the seatback curvature adjustment system mounted on a seatback assembly;
FIG. 4 is a front view of a chair back curvature stepless adjustment system;
FIG. 5 is an exploded view of the stepless adjustment system for the curvature of the chair back;
FIG. 6 is a schematic view of a sliding connection;
FIG. 7 is a schematic view of a pull-on connector;
FIG. 8 is a schematic view of a slider structure;
FIG. 9 is a front view of the back flexure with reduced curvature;
FIG. 10 is a side view of the back rest flexure with reduced curvature;
FIG. 11 is a front view of the back flexure with increased curvature;
figure 12 is a side view of the back rest flexure with increased curvature.
Reference numerals: 1. a back rest flexure; 11. a groove; 12. a U-shaped groove; 13. a baffle; 2. a connecting plate; 3. a sliding connection; 31. a long chute; 32. a guide member; 33. a connecting pin; 331. a through hole; 4. pulling the assembly; 41. the screw rod is driven by the positive and negative teeth; 411. a limiting block; 412. a first diameter section; 412a, an orthodontic thread; 412b, reverse thread; 413. a second diameter section; 414. a nut; 42. pulling the connecting piece; 421. an L-shaped groove; 421a, circular arc; 43. a slide block; 431. a rotation shaft; 44. an adjustment knob; 5. a herringbone fixing frame; 51. an L-shaped connecting end; 52. a connecting block; 53. a fixing member; 6. a pin; 10. the chair back bending radian adjusting system; 20. a backrest assembly; 30. a chair seat; 40. chair legs; 50. a chair rod.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, or may be internal communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 2 to 12: a chair back curvature adjustment system, comprising: the backrest bending piece 1, the sliding connecting piece 3, the pulling component 4 and the positive and negative tooth transmission screw rod 41;
the backrest bending piece 1, one side of the backrest bending piece 1 protruding faces the back of a user, the side of the backrest bending piece 1 away from the protruding side is provided with a connecting plate 2, and the connecting plate 2 is arranged on the chair rod 50;
the sliding connecting piece 3, one end of the sliding connecting piece 3 is slidably arranged on the connecting plate 2, and the other end is arranged at the bottom of the backrest bending piece 1;
the pulling assembly 4 comprises a positive and negative tooth transmission screw rod 41 arranged along the width direction of the connecting plate 2 and a pulling connecting piece 42 symmetrically arranged along the length direction of the connecting plate 2, the positive and negative tooth transmission screw rod 41 drives the pulling connecting piece 42 to synchronously approach or separate from the connecting plate 2 along the length direction of the positive and negative tooth transmission screw rod 41, one end of the pulling connecting piece 42 is hinged with the sliding connecting piece 3, the other end of the pulling connecting piece 42 is hinged with the positive and negative tooth transmission screw rod 41, and the pulling assembly 4 is used for driving the sliding connecting piece 3 to slide up and down, so that the bending radian of the backrest bending piece 1 is changed.
Through rotating positive and negative tooth transmission lead screw 41, make positive and negative tooth transmission lead screw 41 drive pulling connecting piece 42 be close to or keep away from connecting plate 2 along positive and negative tooth transmission lead screw 41 length direction is synchronous, because pulling connecting piece 42 one end is articulated with sliding connection piece 3, the other end is articulated with positive and negative tooth transmission lead screw 41, so drive sliding connection piece 3 and slide from top to bottom along connecting plate 2, thereby change the crooked radian of back bending piece 1, because the crooked radian of chair back is adjusted and can be stopped rotating at arbitrary radian, the size of radian can be arbitrary value in the regulation scope, so be fit for different body types user and use, thereby make the crooked radian of user's back body type adaptation back structure has improved the comfort of taking, application scope is wider. The structure is more stable when the sliding connecting piece 3 is pulled between the two symmetrically arranged pulling connecting pieces 42 and the positive and negative tooth transmission screw rods 41, and the whole chair back bending radian adjusting system 10 is small and exquisite, so that the chair is light and convenient in weight.
The chair back bending radian adjustment system 10 can be produced in a modularized manner, so that mass production and use are facilitated, and the production cost is reduced.
The front and back tooth transmission screw 41 refers to two sections of symmetrically arranged transmission screws, the two sections of transmission screws are provided with opposite front and back screw teeth, and when the front and back tooth transmission screw 41 rotates along the axis, the two connecting pieces are pulled to be mutually and synchronously close to or far away from the connecting plate 2.
As a preferable example of the above embodiment, a slider 43 is provided between the pull connection member 42 and the positive and negative tooth transmission screw 41, the slider 43 is provided on the positive and negative tooth transmission screw 41, and the positive and negative tooth transmission screw 41 rotates to drive the slider 43 to slide along the length direction of the positive and negative tooth transmission screw 41.
The sliding blocks 43 are matched with the teeth of the positive and negative tooth transmission screw rods 41, the number of the sliding blocks 43 is two, and the sliding blocks 43 are symmetrically arranged on two sides of the positive and negative tooth transmission screw rods 41, so that one end of the pulling connecting piece 42 is hinged with the sliding blocks 43.
In this embodiment, the two ends of the slider 43 are provided with the rotation shafts 431, one end of the pull connecting member 42 near the slider 43 is provided with the L-shaped groove 421, one section of the L-shaped groove 421 is parallel to the width direction of the pull connecting member 42, the other section of the L-shaped groove 421 is parallel to the length direction of the pull connecting member 42, the end of the L-shaped groove 421 is provided with the circular arc 421a, and the rotation shaft 431 is disposed in the circular arc 421 a. Thereby facilitating the assembly between the pull-on connector 42 and the slider 43.
During installation, only the rotating shaft 431 slides into the circular arc 421a along the L-shaped groove 421 of the pulling connecting piece 42, so that the structure is simple, the installation is convenient, the installation efficiency is improved, the installation time is saved, and the device is suitable for mass production.
Wherein, the side of sliding connection piece 3 near connecting plate 2 is equipped with long spout 31, and connecting plate 2 is equipped with guide 32, and long spout 31 slides along guide 32.
The guide piece 32 in this embodiment may be a bolt, or may be a reworked guide piece 32, and a standard bolt is used as the guide piece 32, and the bolt cup head is pressed on the long chute 31 of the sliding connector 3, so that the bolt does not need to be completely screwed, and the cost of the whole system is reduced while the use is convenient, at least two bolts are arranged in one long chute 31, in this embodiment, two longitudinal long chutes 31 are adopted, and two bolt guides are arranged in each long chute 31, so that the stability of the sliding connector 3 during up-down sliding is ensured.
As a preference of the above embodiment, the end of the sliding connection member 3 near the back bending member 1 is provided with a connection leg 33, the connection leg 33 is provided with a through hole 331, the bottom of the back bending member 1 is provided with a groove 11, the connection leg 33 is arranged in the groove 11, a U-shaped groove 12 is arranged along the width direction of the bottom of the back bending member 1, a pin 6 is arranged between the U-shaped groove 12 and the through hole 331, and a baffle 13 is arranged at the opening of the U-shaped groove 12.
During installation, the connecting pin 33 is arranged in the groove 11, the through hole 331 is aligned with the U-shaped groove 12, the pin 6 is installed between the through hole 331 and the U-shaped groove 12, the baffle 13 is installed at the bottom of the backrest bending piece 1 to block the opening of the U-shaped groove 12, the pin 6 is prevented from falling off, the U-shaped groove 12 is arranged, the pin 6 is placed from the opening of the U-shaped groove 12 during installation, the pin 6 is not required to be inserted from one end of the backrest bending piece 1, the pin 6 can be made short, and the installation is quicker, so that the installation between the sliding connecting piece 3 and the backrest bending piece 1 is convenient.
The pulling connecting piece 42, the sliding connecting piece 3 and the herringbone fixing frame 5 can be processed into an appearance and a mounting hole by using a stamping die, and the bending process is finished, so that the processing process is convenient, the processing procedure and the processing time are saved, and the mass production is convenient.
In this embodiment, a herringbone fixing frame 5 is horizontally arranged along the width direction of the connecting plate 2, the herringbone fixing frame 5 is symmetrically provided with an L-shaped connecting end 51, a connecting block 52 is arranged on the bottom surface of the L-shaped connecting end 51, the connecting blocks 52 are respectively arranged at two ends of the positive and negative tooth transmission screw 41, and a fixing piece 53 is arranged between the L-shaped connecting end 51 and the connecting block 52.
The herringbone fixing frame 5 is arranged between the positive and negative tooth transmission screw 41 and the connecting plate 2, the positive and negative tooth transmission screw 41 is horizontally fixed on the connecting plate 2, and the middle of the herringbone fixing frame 5 is hollow, so that the main body part of the positive and negative tooth transmission screw 41 is arranged between the L-shaped connecting ends 51, the pulling assembly 4 is convenient to install, the pulling assembly is installed between the L-shaped connecting ends 51 and the connecting blocks 52 through the fixing pieces 53, and the connecting pieces in the embodiment are bolts, and can be riveted or welded and other fixing modes.
Wherein, be equipped with stopper 411 in the middle of positive and negative tooth transmission lead screw 41, stopper 411 both sides are equipped with first diameter section 412 and second diameter section 413 in proper order, are equipped with positive thread 412a and reverse thread 412b on two second diameter sections 413 respectively, and second diameter section 413 is less than first diameter section 412, and first diameter section 412 is located in the connecting block 52, and one side that connecting block 52 kept away from first diameter section 412 is equipped with nut 414. Thereby preventing the front and back teeth from moving left and right to make the whole system more stable.
During installation, the sliding blocks 43 are installed on the first diameter sections 412 on two sides of the limiting block 411, so that the distances between the two sliding blocks 43 and the limiting block 411 are equal, and the connecting block 52 and the nut 414 are sequentially sleeved on the second diameter section 413, so that the left-right movement of the positive and negative tooth transmission screw rod 41 is prevented.
In the embodiment, one end of the front and back tooth transmission screw rod 41 is provided with an adjusting knob 44, and the adjusting knob 44 is provided with anti-skid threads; for increasing friction, and for facilitating the user to rotate the adjustment knob 44, thereby adjusting the degree of curvature of the chair back.
The specific adjusting action is as follows when in use:
the radian of the chair back bending piece 1 is increased, namely the sliding connecting piece 3 moves upwards:
as shown in fig. 9 and 10, the adjusting knob 44 is rotated clockwise, the front and back teeth driving screw rod 41 is also rotated clockwise, and the front and back teeth threads 412a and the back teeth threads 412b are formed on the first diameter sections 412 on both sides of the front and back teeth driving screw rod 41, so that the two sliding blocks 43 on the front and back teeth driving screw rod 41 move in opposite directions at the same time, that is, move outwards respectively, at the same time, the two sliding blocks 43 pull the two pulling connecting pieces 42 to move outwards, so that the other end of the pulling connecting piece 42 drives the sliding connecting piece 3 to slide upwards, and then the bottom end of the chair backrest bending piece 1 also moves upwards, and the radian of the backrest bending piece 1 of the chair is increased to adapt to the requirements of users.
The curvature of the back bending piece 1 of the chair is reduced, namely the sliding connecting piece 3 moves downwards:
as shown in fig. 11 and 12, the adjusting knob 44 is rotated counterclockwise, the front and back teeth driving screw rod 41 is also rotated counterclockwise, and the front and back teeth threads 412a and the back teeth threads 412b are formed on the first diameter sections 412 on both sides of the front and back teeth driving screw rod 41, so that the two sliding blocks 43 on the front and back teeth driving screw rod 41 move simultaneously and relatively, that is, move inwards respectively, at this time, the two sliding blocks 43 push and pull the two pulling connecting pieces 42 to move inwards, so that the other ends of the two pulling connecting pieces 42 drive the sliding connecting pieces 3 to slide downwards, and then the bottom end of the chair backrest bending piece 1 moves downwards, and the radian of the backrest bending piece 1 of the chair is reduced to adapt to the requirements of users.
It should be noted that, the original shape of the back bending member 1 is flat, not bent or slightly bent, and as long as the back bending member 1 is bent, since the back bending member 1 is made of an elastomer material, the back bending member 1 always has a downward force, the back bending member 1 itself has a downward tension, so that the pulling connection members 42 on both sides are always in a stressed state, and when the slider 43 slides inward, the pulling connection members 42 are pulled downward under the tension of the back bending member 1, so that the radian of the back bending member 1 of the chair becomes smaller.
Because the radian of the chair backrest is adjusted in any radian to stop the adjusting knob 44, the radian can be any value within a specified range, so that the chair backrest is more suitable for different people and has stronger adaptability.
The utility model also comprises a chair, as shown in fig. 1, comprising a backrest assembly 20, a chair seat 30, chair legs 40, a chair rod 50 and the chair back bending radian adjusting system 10, wherein the chair back bending radian adjusting system 10 is arranged on the backrest assembly 20, and the backrest assembly 20, the chair seat 30 and the chair legs 40 are sequentially arranged on the chair rod 50 from top to bottom.
Preferably, in the above embodiment, the end of the chair pole 50 near the backrest assembly 20 is provided with a telescopic structure for adjusting the position of the backrest assembly 20 in the height direction of the chair pole 50. The height of the backrest bending piece 1 is adjusted so as to meet the requirements of different heights of users.
It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. A seatback curvature adjustment system, comprising:
the side, which protrudes, of the backrest bending piece faces the back of the user, and the side, which is far away from the protruding, of the backrest bending piece is provided with a connecting plate which is arranged on the chair rod;
one end of the sliding connecting piece is slidably arranged on the connecting plate, and the other end of the sliding connecting piece is arranged at the bottom of the backrest bending piece;
the pulling assembly comprises a positive and negative tooth transmission screw rod arranged along the width direction of the connecting plate and a pulling connecting piece symmetrically arranged along the length direction of the connecting plate, the positive and negative tooth transmission screw rod drives the pulling connecting piece to synchronously approach or separate from the connecting plate along the length direction of the positive and negative tooth transmission screw rod, one end of the pulling connecting piece is hinged with the sliding connecting piece, the other end of the pulling connecting piece is hinged with the positive and negative tooth transmission screw rod, and the pulling assembly is used for driving the sliding connecting piece to slide up and down so as to change the bending radian of the backrest bending piece.
2. The chair back bending radian adjustment system according to claim 1, wherein a sliding block is arranged between the pulling connecting piece and the positive and negative tooth transmission screw rod, the sliding block is arranged on the positive and negative tooth transmission screw rod, and the positive and negative tooth transmission screw rod rotates to drive the sliding block to slide along the length direction of the positive and negative tooth transmission screw rod.
3. The chair back bending radian adjusting system according to claim 2, wherein rotating shafts are arranged at two ends of the sliding block, an L-shaped groove is formed in one end, close to the sliding block, of the pulling connecting piece, one section of the L-shaped groove is parallel to the width direction of the pulling connecting piece, the other section of the L-shaped groove is parallel to the length direction of the pulling connecting piece, an arc is arranged at the tail end of the L-shaped groove, and the rotating shafts are arranged in the arc.
4. The chair back curvature adjustment system of claim 1, wherein the sliding connector has a long chute on a side thereof adjacent to the connecting plate, the connecting plate has a guide, and the long chute slides along the guide.
5. The chair back bending radian adjusting system according to claim 1, wherein one end of the sliding connecting piece, which is close to the back bending piece, is provided with a connecting pin, the connecting pin is provided with a through hole, the bottom of the back bending piece is provided with a groove, the connecting pin is arranged in the groove, a U-shaped groove is arranged along the width direction of the bottom of the back bending piece, a pin is arranged between the U-shaped groove and the through hole, and a baffle is arranged at the opening of the U-shaped groove.
6. The chair back bending radian adjusting system according to claim 1, wherein a herringbone fixing frame is horizontally arranged along the width direction of the connecting plate, L-shaped connecting ends are symmetrically arranged on the herringbone fixing frame, connecting blocks are arranged on the bottom surfaces of the L-shaped connecting ends, the connecting blocks are respectively arranged at two ends of the positive and negative tooth transmission screw rod, and fixing pieces are arranged between the L-shaped connecting ends and the connecting blocks.
7. The chair back bending radian adjusting system according to claim 6, wherein a limiting block is arranged in the middle of the positive and negative tooth transmission screw rod, a first diameter section and a second diameter section are sequentially arranged on two sides of the limiting block, positive tooth threads and negative tooth threads are respectively arranged on the two second diameter sections, the second diameter section is smaller than the first diameter section, the first diameter section is arranged in the connecting block, and a nut is arranged on one side, away from the first diameter section, of the connecting block.
8. The chair back bending radian adjusting system according to claim 1, wherein one end of the positive and negative tooth transmission screw rod is provided with an adjusting knob, and the adjusting knob is provided with anti-skid threads.
9. A chair, characterized by comprising a backrest assembly, a chair seat, chair legs, a chair rod and a chair back bending radian adjusting system according to any one of claims 1 to 8, wherein the chair back bending radian adjusting system is arranged on the backrest assembly, and the backrest assembly, the chair seat and the chair legs are sequentially arranged on the chair rod from top to bottom.
10. The chair according to claim 9, wherein said seat post has a telescoping structure at an end thereof adjacent said back rest assembly for adjusting the position of said back rest assembly in the longitudinal direction of said seat post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322462974.9U CN220675599U (en) | 2023-09-11 | 2023-09-11 | Chair back bending radian adjusting system and chair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322462974.9U CN220675599U (en) | 2023-09-11 | 2023-09-11 | Chair back bending radian adjusting system and chair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220675599U true CN220675599U (en) | 2024-03-29 |
Family
ID=90405060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322462974.9U Active CN220675599U (en) | 2023-09-11 | 2023-09-11 | Chair back bending radian adjusting system and chair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220675599U (en) |
-
2023
- 2023-09-11 CN CN202322462974.9U patent/CN220675599U/en active Active
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