Tray of chair

Abstract

The utility model discloses a tray of a chair, which comprises a main body seat, the main body seat is divided into three parts which are respectively used for connecting a support base, arranging a tipping control component and arranging a tipping buffer component, the third part is positioned at the rearmost end and is also used for rotationally connecting a tail plate, and the tail plate is forwards provided with an extension part with a locking position. The extension part is located at the second part, so that the tipping buffer assembly in the second part can play a role in tipping locking at different angles; the main body seat is divided into three areas, namely a first part, a second part and a third part, each part has respective functions, and parts or assemblies in the respective parts can realize various functions, so that the tray has complete functions; the first part and the third part are the front part and the rear part of the main body seat respectively, the three parts completely form the main body seat, the sizes of the three parts are equivalent to those of respective parts or components, the structure is compact, the main body seat has no redundant parts, and therefore the cost is effectively reduced under the condition that complete functions are kept, and the advantages of being high in quality and low in price are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of furniture, in particular to a tray of chair. BACKGROUND

[0002] In the field of chair manufacturing, the tray as the core component connecting the seat, back and support base, its functionality and cost control have been the key focus of industry competition. The tray products on the current market generally face the contradiction of "difficult to balance functionality and cost", which is difficult to meet the urgent needs of enterprises for "good quality and low price".

[0003] There are many types and prices of trays for chairs. Whether it is a chair accessory manufacturer or a chair assembly manufacturer, they prefer trays that are good in quality and low in price, that is, they have complete functions and low cost. The functions of existing general and conventional trays are nothing more than back reclining, reclining buffer, reclining locking and gas rod lifting. However, there are not many trays with complete functions. Even the large part of the tray does not have reclining locking. Most products can only realize basic functions such as back reclining, reclining buffer and gas rod lifting. However, reclining locking, an important function to improve the safety and comfort of the chair, is not widely used due to its complex structure and high cost, which leads to the inability of users to fix the back angle according to actual needs during use.

[0004] Moreover, due to the requirement of multi-functionality, the existing conventional tray often needs to stack a large number of parts, resulting in a bulky internal structure. The space occupied by the internal structure is large, which reflects in the large size and volume of the tray. More materials are consumed, and the material cost and packaging and transportation cost are high, which leads to the inability to further reduce the price of the tray.

[0005] Therefore, the existing tray is difficult to achieve good quality and low price, and there is an urgent need for a low-cost and fully functional tray on the market. SUMMARY

[0006] In order to solve the above technical problems, the utility model provides a tray of chair, including main body seat, main body seat is divided into three parts, and is used for connecting support base, setting reclining control component and setting reclining buffer component respectively, third part is located at last end and is used for rotary connection tail plate, tail plate is equipped with the extension of having locking position to the front, the extension is in the second part, and the reclining buffer component in the second part can play the reclining locking under different angles. The first and third parts are the front and rear parts of the main body seat, respectively. The three parts completely constitute the main body seat. The size of the three parts and the size of the components or assemblies set respectively are equivalent. The structure is compact and there is no redundant part in the main body seat, thereby effectively reducing the cost under the condition of keeping complete functions.

[0007] The technical scheme of the utility model is implemented as follows:

[0008] A tray of a chair, comprising a main seat, the main seat comprising a first part, a second part and a third part, the first part being located at the front end of the main seat and used for connecting a supporting base of a chair seat, the third part being located at the rear end of the main seat and provided with a reclining buffer assembly, the second part being located between the first part and the third part and provided with a reclining control assembly; the reclining buffer assembly comprising a rotating shaft and a buffer elastic piece, the third part further being rotatably connected with a tail plate through the rotating shaft, the two ends of the buffer elastic piece being connected with the tail plate and the main seat respectively and being configured to provide a buffer when the tail plate rotates downwardly and rearwardly; the tail plate being provided with an extension part at the front part thereof, the extension part extending forwardly to the side of the second part, the extension part being provided with a plurality of locking positions, the locking positions being configured to be locked with the reclining control assembly to realize the locking of the tail plate at different angles.

[0009] The main seat is divided into three regions, i.e. the first part, the second part and the third part, each part having its own function, and the components or assemblies in each part can realize multiple functions, so that the tray is fully functional; moreover, the first part and the third part are respectively the front part and the rear part of the main seat, and the three parts completely constitute the main seat, the sizes of the three parts and the sizes of the components or assemblies arranged in the three parts are comparable, the structure is compact and the main seat has no redundant part, on the one hand, the size of the main seat can be effectively reduced, the material cost can be reduced and the transportation cost can be ensured, and on the other hand, the structure is simpler and the layout of the structure is self-evident, so that the production and assembly are very convenient and the after-sales maintenance is very convenient.

[0010] As a preferred, the first part is used for connecting a lifting air rod of the supporting base, and a lifting control assembly is further arranged in the first part. The lifting air rod control function is realized, and the function is more complete.

[0011] As a preferred, the first part is provided with a first mounting seat, and a sleeve for connecting the lifting air rod is arranged on the first mounting seat and the first part; the lifting control assembly comprises a pressing piece rotatably arranged on the first mounting seat, the pressing piece being located above the sleeve, and the rotation of the pressing piece being controlled by a first pull wire. Due to the reduction of cost, even if a pull wire with better experience is used, the cost will not exceed that of the existing conventional tray.

[0012] As a preferred, an additional shaft is arranged on the rotating shaft, the diameter of the additional shaft being greater than the diameter of the rotating shaft, and the buffer elastic piece being sleeved on the additional shaft. The rotating shaft is relatively thin, the inner diameter of the buffer elastic piece is relatively thick, the additional shaft can fill the gap between the buffer spring and the rotating shaft, the material of the rotating shaft is generally metal, and the strength requirement is met, and the material of the additional shaft can be plastic, so that the cost is saved.

[0013] As a preferred, the second part is provided with a blocking seat, the tail plate is provided with a supporting shaft, the buffer elastic piece is a spring, and the two ends of the buffer elastic piece are arranged on the blocking seat and the supporting shaft respectively. The front end of the buffer elastic piece is bent and inserted below the blocking seat, and the rear end of the buffer elastic piece is bent and abuts below the supporting shaft.

[0014] As preferred, the tilting control assembly comprises at least two sliding locking pins arranged in the second part, the different locking pins are arranged in parallel and spaced apart, and the axes of the locking pins are arranged in the left-right direction; the extension part is provided with at least two groups of the locking positions, each group of the locking positions corresponds to one locking pin; the tilting control assembly further comprises a driving assembly configured to drive the locking pins to slide; each group of the locking positions is staggered in the height direction and the front-rear direction, the locking pins and the locking positions are configured such that only one locking pin can enter its corresponding locking position at the same time, and the different locking pins entering the corresponding locking positions keep the tailgate at different rotation angles. The existing tray commonly uses a sliding sheet to realize tilting, which occupies a large internal space and makes the size of the tray unable to be reduced; the sliding sheet can realize stepless locking, and the present scheme replaces it with gear locking, although the stepless effect is lost, but the length and thickness of the tray in the front-rear direction can be reduced, greatly reducing the required materials and costs; through the arrangement of multiple locking pins and multiple groups of locking positions, large-angle multi-gear locking is realized, the height direction between different locking positions is more compact, the difference between gears is smaller, and selection and adjustment are more delicate, improving the use experience.

[0015] As preferred, the driving assembly comprises a first elastic member and a second elastic member, the locking pin is provided with a protruding portion, the protruding portion protrudes radially from the locking pin, the first elastic member and the second elastic member are located on both sides of the protruding portion, the first elastic member is away from the extension part relative to the second elastic member, the first elastic member always gives the locking pin a spring force moving towards the extension part, and the second elastic member always gives the locking pin a spring force moving away from the extension part; when the locking pin enters the corresponding locking position, the first elastic member is elongated, and the second elastic member is compressed; when the locking pin leaves the locking position, the first elastic member is compressed, and the second elastic member is elongated. The first elastic member and the second elastic member are arranged in cooperation with each other, and together make the locking pin in a floating state, the compression or elongation of the first and second elastic members can drive the locking pin to move, and also provide a trend of movement when the locking pin is blocked and stationary, and make it move when the locking pin is no longer blocked.

[0016] As preferred, the driving assembly further comprises a slider, the slider is slidingly arranged on the main body seat in the left-right direction, the locking pins are further arranged in the slider, the first elastic members are all in abutment with the slider, the other ends of the first elastic members are in abutment with the protruding portions, the second elastic members are all in abutment with the main body seat, the other ends of the second elastic members are in abutment with the protruding portions; the slider is configured to simultaneously control the elongation or compression of the first elastic members; when the slider slides away from the extending portion, the first elastic members and the second elastic members are all elongated, all the locking pins slide away from the extending portion, and the locking pins located in the locking positions are out of the locking positions; when the slider slides towards the extending portion and any locking pin is aligned with the corresponding locking position, the first elastic member and the second elastic member on the locking pin are compressed, the locking pin enters the locking position, and the first elastic member on the other locking pins is also shortened; the sliding of the slider is controlled by the second pull wire. The main purpose of the slider is to simultaneously control the movement of all the locking pins, but not directly control, but indirectly control through the elastic members; even if the pull wire is used for control, the overall cost of the tray can be reduced, and the use experience is also improved.

[0017] As preferred, a third elastic member is arranged between the slider and the main body seat, one end of the third elastic member is in abutment with the slider, and the other end is in abutment with the main body seat on the side away from the extending portion, and the third elastic member is configured to always give the slider a spring force for sliding towards the extending portion.

[0018] As preferred, the second part is fixedly provided with a second mounting seat, the second mounting seat comprises two sliding seat plates, the two sliding seat plates are arranged in front of and behind each other, and sliding grooves are formed in the sliding seat plates; the two sides of the slider each protrude with a plug, and the two plugs are slidingly arranged in the sliding grooves. The blocking seat is part of the second mounting seat.

[0019] As preferred, the upper part of the main body seat has at least two seat mounting plates, the seat mounting plates are arranged symmetrically left and right and extend outward from the main body portion. The main body seat and the seat mounting plates are integrally formed, and the seat mounting plates are formed by bending. The extending portion is located below the seat mounting plates, the extending portion is located on the front side of the rotating connection point of the tail plate, and the upper end of the extending portion has an inclined surface inclined from back to front.

[0020] As preferred, the length ratio of the main body seat to the tail plate in the front-back direction is 0.75-1. Compared with the conventional tray, the ratio is smaller, the size of the tail plate of the tray is more conventional, and therefore the size of the main body seat is smaller, which effectively reduces the material consumption of the main body seat and reduces the material and packaging transportation costs.

[0021] As preferred, the length of the main body seat in the front-back direction is 130-140mm. Due to the above scheme, the structure inside the main body seat is more compact, and the overall length of the main body seat is smaller, which effectively reduces the material consumption of the main body seat and reduces the material and packaging transportation costs.

[0022] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0023] The main body seat is divided into three parts, i.e., a first part, a second part and a third part, each part has its own function, and the components or assemblies in each part can realize various functions, so that the tray is fully functional; and the first part and the third part are respectively front and rear parts of the main body seat, and the three parts completely constitute the main body seat, the sizes of the three parts and the sizes of the components or assemblies arranged in each part are comparable, the structure is compact and there is no redundant part in the main body seat, on the one hand, the size of the main body seat can be effectively reduced, the material cost and the transportation cost are reduced, and on the other hand, the structure is simpler, the structure layout is clear at a glance, and whether production assembly or after-sales maintenance is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A perspective view of the tray of the chair in the embodiment of the utility model Figure 1 ;

[0025] Figure 2 A perspective view of the tray of the chair in the embodiment of the utility model Figure 2 ;

[0026] Figure 3 A top view of the tray of the chair in the embodiment of the utility model

[0027] Figure 4 A side view when the locking pin enters the second locking position in the embodiment of the utility model

[0028] Figure 5 A side view when the locking pin enters the third locking position in the embodiment of the utility model

[0029] Figure 6 A perspective view of the main body seat in the embodiment of the utility model

[0030] Figure 7 A perspective view when the slider makes a single locking pin and its corresponding locking position lock and extend in the embodiment of the utility model

[0031] Figure 8 A perspective view when the slider makes two locking pins all retreat in the embodiment of the utility model

[0032] Figure 9 A perspective view when the locking pin exits the locking position, the tail plate can rotate with the main body seat in the embodiment of the utility model

[0033] Figure 10 An explosion view of the additional shaft and the buffer elastic member in the embodiment of the utility model

[0034] The reference numerals in the attached drawings are as follows: Main body 1; First part 101; Second part 102; Third part 103; Side plate 11; Base plate 12; Seat mounting plate 13; Tail plate 2; Connecting plate 21; Rotating plate 22; Extension plate 23; First locking position 231; Second locking position 232; Third locking position 233; Support shaft 24; Rotating shaft 3; First mounting seat 4; Sleeve 5; Pressing element 6; Additional shaft 7; Buffer elastic element 8; First pull line 9; Second pull line 10; Second mounting seat 14; Sliding seat plate 141; Abutting plate 142; Slide groove 143; Opening 144; Blocking seat 145; Locking pin 15; Protrusion 151; First elastic element 16; Second elastic element 17; Third elastic element 18; Slider 19; Insert block 191. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] The specific embodiments of this utility model are as follows:

[0039] like Figures 1-3 As shown, this utility model provides a chair tray, including a main body 1. The main body 1 includes a first part 101, a second part 102, and a third part 103. The first part 101 is located at the front end of the main body 1 and is used to connect to the support base of the chair seat. The third part 103 is located at the rear end of the main body 1 and is provided with a tilt buffer assembly. The second part 102 is located between the first part 101 and the third part 103 and is provided with a tilt control assembly. The tilt buffer assembly includes a pivot 3 and a buffer elastic element 8. The third part 103 is also rotatably connected to a tail plate 2 through the pivot 3. The two ends of the buffer elastic element 8 are respectively connected to the tail plate 2 and the main body 1 and are configured to provide buffering when the tail plate 2 rotates backward and downward. The front part of the tail plate 2 is provided with an extension that extends forward to the side of the second part 102. The extension is provided with several locking positions, which are configured to lock the tail plate 2 at different angles with the tilt control assembly.

[0040] The main body seat 1 is divided into three parts, i.e. the first part, the second part and the third part, each part has its own function, and the components or assemblies in each part can realize various functions, so that the tray is fully functional; and the first part and the third part are respectively the front part and the rear part of the main body seat 1, and the three parts constitute the main body seat 1, the size of the three parts is equivalent to the size of the components or assemblies arranged therein, the structure is compact and there is no redundant part in the main body seat 1, on the one hand, the size of the main body seat 1 can be effectively reduced, the material cost and the transportation cost can be reduced, and on the other hand, the structure is simple and the layout is clear, so that the production and assembly are very convenient and the after-sales maintenance is very convenient.

[0041] Specifically, as shown in Figure 6 , the main body seat 1 is approximately U-shaped, the upper part of the main body seat 1 has two seat mounting plates 13, the two seat mounting plates 13 are arranged symmetrically left and right and extend outwardly from the main body seat 1, the seat mounting plate 13 covers the first part, the second part and the third part from front to back; the main body seat 1 and the seat mounting plate 13 are integrally formed, and the seat mounting plate 13 is formed by bending; the extension part is located below the seat mounting plate 13, the extension part is located on the front side of the rotation connection point of the tail plate 2, and the upper end of the extension part has an inclined surface inclined from back to front; the main body seat 1 comprises a bottom plate 12 and two side plates 11 arranged left and right with a space therebetween, the side plates 11 are vertically arranged, the upper end of the side plate 11 is connected with the seat mounting plate 13, the lower end of the side plate 11 is connected with the two ends of the bottom plate 12, and the side plate 11 is also formed by bending, and the seat mounting plate 13, the side plate 11 and the bottom plate 12 are integrally formed.

[0042] The tail plate 2 comprises a connecting plate 21 and two vertical rotating plates 22, the two rotating plates 22 are arranged left and right with a space therebetween on the left and right sides of the connecting plate 21, and the rotating plate 22 is located on the outer side of the main body seat 1, i.e. on the outer side of the side plate 11; the extension part is located on one of the rotating plates 22, and the extension part is located on the outer side of the side plate 11; the rotating plate 22 is located on the outer side of the main body seat 1, and the extension part is also located on the outer side of the main body seat 1, so as to effectively avoid the structure inside the main body seat 1 and prevent movement interference.

[0043] As shown in Figure 1 , 2 , the first part 101 is located at the frontmost side of the main body seat 1, and the first part 101 is specifically used for connecting the lifting air rod of the supporting base, and a lifting control assembly is further arranged on the first part 101; a first mounting seat 4 is arranged in the first part 101, the first mounting seat 4 and the first part 101 are provided with a sleeve 5 for connecting the lifting air rod; the lifting control assembly comprises a pressing piece 6 rotatably arranged on the first mounting seat 4, the pressing piece 6 is located above the sleeve 5, and the rotation of the pressing piece 6 is controlled by a first pull wire 9.

[0044] As shown in Figure 1 , 10As shown, the third part 103 is located at the last side of the main body seat 1, and the rotating shaft 3 on it is used to connect the tail plate 2, in addition, the buffer elastic member 8 provides buffering when the tail plate 2 rotates backward and downward, improving the comfort when the chair back is tilted backward; further, the rotating shaft 3 is provided with an additional shaft 7, the diameter of the additional shaft 7 is greater than that of the rotating shaft 3, and the buffer elastic member 8 is sleeved on the additional shaft 7; the rotating shaft 3 is thin, and the inner diameter of the buffer elastic member 8 is thick, the additional shaft 7 can fill the gap between the buffer spring and the rotating shaft 3, the material of the rotating shaft 3 is generally metal, which has strength requirements, and the material of the additional shaft 7 can be plastic, which saves cost; the second part 102 is fixedly provided with a blocking seat 145, the tail plate 2 is provided with a supporting shaft 24, the buffer elastic member 8 is a spring, and the two ends of the buffer elastic member 8 are arranged on the blocking seat 145 and the supporting shaft 24 respectively, the front end of the buffer elastic member 8 is bent and inserted below the blocking seat 145, and the rear end of the buffer elastic member 8 is bent and abuts below the supporting shaft 24.

[0045] As shown in the drawings, Figures 1-5 As shown, the tilt control assembly arranged in the second part 102 includes at least two sliding locking pins 15 arranged in the second part 102, different locking pins 15 are arranged in parallel and spaced apart, and the axis of the locking pin 15 is arranged in the left-right direction; the extension is provided with at least two groups of the locking position, the locking position moves with the rotation of the tail plate 2, each group of the locking position corresponds to a locking pin 15, and the side view projection of the locking pin 15 is located on the movement path of the corresponding locking position; the tilt control assembly further includes a driving assembly, the driving assembly is configured to drive the locking pin 15 to slide, and when any locking pin 15 is aligned with the corresponding locking position, the driving assembly can drive the locking pin 15 to enter the corresponding locking position; each group of the locking position is staggered in the height direction and the front-rear direction, the locking pin 15 and the locking position are configured such that only one locking pin 15 can enter its corresponding locking position at the same time, and different locking pins 15 enter the corresponding locking position to keep the tail plate 2 at different rotation angles; the existing tray commonly uses a sliding sheet to realize tilting, which occupies a large internal space, so that the size of the tray cannot be reduced; the sliding sheet can realize stepless locking, and the present scheme replaces it with gear locking, although the stepless effect is lost, but the length and thickness of the tray in the front-rear direction can be reduced, greatly reducing the required materials and cost.

[0046] Further, the main seat 1 is used to connect the supporting base of the seat, such as the lifting gas rod and the supporting leg, and the tail plate 2 is used to connect the back of the seat, and the rotation of the tail plate 2 on the main seat 1 is the reclining of the back; the locking positions are staggered in the front-rear direction and the height direction, the stagger in the front-rear direction is to correspond to the interval of the locking pins 15, and the stagger in the height direction is to lock the tail plate 2 at different rotation angles; the side view projection of the locking pin 15 is located on the movement path corresponding to the locking position, so that the locking position can be aligned with the locking pin 15 when the tail plate 2 rotates; when locking, only one locking pin 15 works at a time, and it is enough to lock the tail plate 2, and due to the arrangement of the locking positions, the tail plate 2 can be locked at multiple rotation angles, and different locking pins 15 work at different angles; through the arrangement of multiple locking pins 15 and multiple sets of locking positions, the large-angle multi-gear locking is realized, the overall height occupied by the locking positions is reduced, the size of the extension part is also reduced, the material cost is reduced, the height direction between different locking positions is more compact, the difference between gears is smaller, the selection and adjustment are more delicate, and the use experience is improved.

[0047] Specifically, as shown in Figures 7-9 The driving assembly includes a first elastic member 16 and a second elastic member 17, the locking pin 15 is provided with a protruding part 151, the protruding part 151 protrudes radially along the locking pin 15, the first elastic member 16 and the second elastic member 17 are located on the two sides of the protruding part 151 respectively, the first elastic member 16 is away from the extension part relative to the second elastic member 17, the first elastic member 16 always gives the locking pin 15 a spring force moving towards the extension part, and the second elastic member 17 always gives the locking pin 15 a spring force moving away from the extension part; when the locking pin 15 enters the corresponding locking position, the first elastic member 16 is elongated, and the second elastic member 17 is compressed; when the locking pin 15 leaves the locking position, the first elastic member 16 is compressed, and the second elastic member 17 is elongated. The first elastic member 16 and the second elastic member 17 are cooperatively arranged to make the locking pin 15 in a floating state, the compression or elongation of the first and second elastic members can drive the locking pin 15 to move, and can also provide a movement trend when the locking pin 15 is blocked and stationary, and make it move when the locking pin 15 is no longer blocked; the locking pin 15 can be directly controlled by a pull wire, and different locking pins 15 can be controlled respectively, but it is not the best choice.

[0048] The driving assembly further comprises a sliding block 19 slidingly arranged on the main body seat 1 in the left-right direction, the locking pin 15 is further inserted in the sliding block 19, the first elastic member 16 is in abutment with the sliding block 19, the other end of the first elastic member 16 is in abutment with the protruding part 151, the second elastic member 17 is in abutment with the main body seat 1, the other end of the second elastic member 17 is in abutment with the protruding part 151; the sliding block 19 is configured to control the elongation or compression of the first elastic member 16 at the same time; when the sliding block 19 slides away from the extension part, the first elastic member 16 and the second elastic member 17 are both elongated, all the locking pins 15 slide away from the extension part, and the locking pin 15 located in the locking position leaves the locking position; when the sliding block 19 slides towards the extension part and any locking pin 15 is aligned with the corresponding locking position, the first elastic member 16 and the second elastic member 17 on the locking pin 15 are compressed, the locking pin 15 enters the locking position, and the first elastic member 16 on the other locking pin 15 is also shortened; the sliding of the sliding block 19 is controlled by the second pull wire 10; even if the pull wire is used for control, the overall cost of the tray can be reduced, and the pull wire control also increases the use experience.

[0049] The sliding block 19 slides away from the extension part, and the unlocking of the locking pin 15 also needs to slide away from the extension part, so the second elastic member 17 is definitely elongated, after the second elastic member 17 is elongated, the elastic force becomes smaller, in order to maintain force balance, the elastic force of the first elastic member 16 also needs to become smaller, so the first elastic member 16 is also elongated, from here it can also be seen that the sliding distance of the sliding block 19 is greater than the sliding distance of the locking pin 15; similarly, after the locking pin 15 enters the locking position, the second elastic member 17 is compressed, so the elastic force becomes larger, in order to maintain force balance, the elastic force of the first elastic member 16 also needs to become larger, so the first elastic member 16 is also compressed; the locking pin 15 which is not aligned with the locking position is blocked by the extension part and cannot move, the first elastic member 16 on it is definitely compressed, and the second elastic member 17 at least will not be elongated, that is, it may be compressed or not changed, which depends on whether there is a gap between the end of the locking pin 15 and the extension part when unlocking, if there is no gap, the length of the second elastic member 17 will not change, generally there will be a gap, and the length of the second elastic member 17 will also be shortened, but at this time the elastic force of the first and second elastic members will not be in a state of force balance, the locking pin 15 will be pushed by the first elastic member 16 to the extension part and abut against the extension part; further, when none of the locking pins 15 are aligned with the locking position, the sliding block 19 moves towards the extension part, the first elastic member 16 still always gives the locking pin 15 a sliding force towards the extension part after resisting the second elastic member 17, at this time, as long as the tail plate 2 is further rotated to align any locking pin 15 with its corresponding locking position, the locking pin 15 can enter the locking position under the action of the first elastic member 16 to complete the locking.

[0050] The third elastic member 18 is arranged between the sliding block 19 and the main body seat 1, one end of the third elastic member 18 is abutted on the sliding block 19, and the other end is abutted on the main body seat 1 away from the extending portion, and the third elastic member 18 is configured to always give the sliding block 19 a sliding force towards the extending portion; in combination with the above scheme, the third elastic member 18 is sleeved on the second pull wire 10, and when the user operates, only the unlocking can be operated by the pull wire, and when the pull wire is loosened, it is switched to the locking, and at this time, even if the locking pin 15 is not aligned with the locking position, the locking pin 15 can be aligned with the locking position after the tail plate 2 is slightly rotated, so as to realize the delayed locking; in this process, the tail plate 2 can be rotated upward or downward, depending on the degree of the user's back leaning on the chair back.

[0051] The second part 102 is fixedly provided with a second mounting seat 14, the second mounting seat 14 includes two sliding seat plates 141, the two sliding seat plates 141 are arranged in front of and behind each other, a sliding groove 143 is formed in the sliding seat plate 141, and one plug block 191 is protruded on each side of the sliding block 19, and the two plug blocks 191 are slidably inserted into the sliding grooves 143, respectively; the blocking seat 145 is a part of the second mounting seat 14 and is located on the side away from the extending portion; the sliding seat plate 141 of the second mounting seat 14 is further provided with an open mouth 144, the open mouth 144 is communicated with the sliding groove 143, so that the plug block 191 of the sliding block 19 is loaded into the sliding groove 143. The second mounting seat 14 further includes an abutting plate 142, the sliding seat plate 141 is vertically arranged along the left-right direction, and the abutting plate 142 is vertically arranged along the front-rear direction; the abutting plate 142 is arranged close to the extending portion, and the second elastic member 17 is abutted with the abutting plate 142; the second elastic member 17 directly abuts with the main body seat 1 and needs a length, and the position of the abutting plate 142 is moderate, which not only makes the elastic member more easily controlled, but also saves the cost of the elastic member.

[0052] More specifically, the locking pin 15 has two, and the locking position has two groups; the first group of locking positions includes the first locking position 231 and the third locking position 233, and the second group of locking positions includes the second locking position 232, the first locking position 231 is located above the second locking position 232, and the third locking position 233 is located below the second locking position 232; the second locking position 232 is closer to the rotating connection point of the tail plate 2 than the first locking position 231 and the third locking position 233; the first locking position 231 is a notch, and the second locking position 232 and the third locking position 233 are both through holes; the first locking position 231 is a notch, which does not need to be punched, which not only simplifies the production, but also reduces the use of materials.

[0053] As Figures 3-5As shown, the length ratio of the main seat 1 and the tail plate 2 in the front-rear direction is 0.75-1, and the length of the main seat 1 in the front-rear direction is 130-140 mm; due to the above scheme, the structure inside the main seat 1 is more compact, and the overall length of the main seat 1 is smaller, in other words, the length ratio of the main seat 1 and the tail plate 2 is smaller relative to the existing conventional tray, and in the embodiment, the tail plate 2 is selected to be a conventional size, so the size of the main seat 1 is obviously smaller, while ensuring the function to be realized, effectively reducing the material consumption of the main seat 1, and reducing the cost of materials and packaging and transportation.

Claims

1. A tray for a chair, characterized by: The main body seat comprises a first part, a second part and a third part, the first part is located at the front end of the main body seat and is used for connecting the supporting base of the seat, the third part is located at the rear end of the main body seat and is provided with a reclining buffer assembly, and the second part is located between the first part and the third part and is provided with a reclining control assembly; the reclining buffer assembly comprises a rotating shaft and a buffer elastic piece, and a tail plate is further rotationally connected to the third part through the rotating shaft, and the two ends of the buffer elastic piece are connected with the tail plate and the main body seat and are configured to give a buffer when the tail plate rotates downwardly and rearwardly; the tail plate is provided with an extension part at the front part, the extension part extends to the side of the second part, and a plurality of locking positions are arranged on the extension part and are configured to be locked with the reclining control assembly to realize the locking of the tail plate at different angles.

2. The tray of a chair according to claim 1, characterized in that: The first part is used for connecting the lifting gas rod of the supporting base, and a lifting control assembly is further arranged on the first part.

3. The tray of a chair according to claim 2, characterized in that: The first part is provided with a first mounting seat, and a sleeve for connecting the lifting gas rod is arranged on the first mounting seat and the first part; the lifting control assembly comprises a pressing piece rotationally arranged on the first mounting seat, the pressing piece is located above the sleeve, and the rotation of the pressing piece is controlled by a first pull wire arranged on the first part.

4. The tray of the chair of claim 1, wherein: An additional shaft is arranged on the rotating shaft, the diameter of the additional shaft is greater than that of the rotating shaft, and the buffer elastic piece is sleeved on the additional shaft.

5. The tray of the chair of claim 1, wherein: The second part is provided with a blocking seat, the tail plate is provided with a supporting shaft, the buffer elastic piece is a spring, and the two ends of the buffer elastic piece are arranged on the blocking seat and the supporting shaft, respectively.

6. The tray of the chair of claim 1, wherein: The reclining control assembly comprises at least two lock pins slidingly arranged in the second part, different lock pins are arranged in parallel and at intervals, and the axes of the lock pins are arranged in the left-right direction; the extension part is provided with at least two groups of the locking positions, each group of the locking positions corresponds to a lock pin; the reclining control assembly further comprises a driving assembly, and the driving assembly is configured to drive the lock pin to slide; each group of the locking positions is staggered in the height direction and the front-rear direction, and the lock pin and the locking position are configured such that only one lock pin can enter its corresponding locking position at the same time, and different lock pins enter the corresponding locking positions to keep the tail plate at different rotating angles.

7. The tray of a chair according to claim 6, characterized in that: The driving assembly comprises a first elastic piece and a second elastic piece, the lock pin is provided with a protruding part, the protruding part protrudes radially from the lock pin, the first elastic piece and the second elastic piece are located on the two sides of the protruding part, the first elastic piece is away from the extension part relative to the second elastic piece, the first elastic piece always gives the lock pin a spring force moving towards the extension part, and the second elastic piece always gives the lock pin a spring force moving away from the extension part; when the lock pin enters the corresponding locking position, the first elastic piece is elongated, and the second elastic piece is compressed; when the lock pin leaves the locking position, the first elastic piece is compressed, and the second elastic piece is elongated.

8. Tray for a chair according to claim 7, characterized in that: The driving assembly further comprises a slider which is slidingly arranged on the main body seat in the left-right direction, the locking pins are further inserted in the slider, the first elastic members are all in abutment with the slider, the other end of the first elastic members is in abutment with the protruding portion, the second elastic members are all in abutment with the main body seat, the other end of the second elastic members is in abutment with the protruding portion; the slider is configured to simultaneously control the elongation or compression of the first elastic members; when the slider slides away from the extending portion, the first elastic members and the second elastic members are all elongated, all the locking pins slide away from the extending portion, and the locking pins located in the locking positions are out of the locking positions; when the slider slides towards the extending portion and any locking pin is aligned with the corresponding locking position, the first elastic members and the second elastic members on the locking pin are compressed, the locking pin enters the locking position, and the first elastic members on the other locking pins are also shortened; the sliding of the slider is controlled by the second pull wire arranged on the second part.

9. Tray for a chair according to claim 8, characterized in that: A third elastic member is arranged between the slider and the main body seat, one end of the third elastic member is in abutment with the slider, and the other end is in abutment with the main body seat on the side away from the extending portion, and the third elastic member is configured to always give the slider a spring force for sliding towards the extending portion.

10. The tray of the chair of claim 8, characterized in that: The second part is fixedly provided with a second mounting seat, the second mounting seat comprises two sliding seat plates, the two sliding seat plates are arranged in front of and behind each other, a sliding groove is formed in the sliding seat plate, and each side of the slider is provided with a plug, and the two plugs are slidingly inserted in the sliding groove.

11. The tray of the chair of claim 1, wherein: The upper part of the main body seat has at least two seat mounting plates, the seat mounting plates are symmetrically arranged left and right and extend outward from the main body portion.

12. The tray of the chair of claim 1, wherein: The length ratio of the main body seat and the tail plate in the front-rear direction is 0.75-1.

13. The tray of the chair of claim 1, wherein: The length of the main body seat in the front-rear direction is 130-140 mm.

Images