Multi-gear chair back tipping locking chassis

Abstract

The utility model provides a multi-gear chair back tipping locking chassis. Comprising a base configured to be a main supporting body, a bearing piece connected with a chair back and rotationally arranged on the base, a gear seat arranged on the bearing piece, a locking piece rotationally arranged on the base, an operating rod slidably inserted into the base and an elastic connecting piece arranged on the operating rod and connected with the locking piece. The elastic connecting piece drives the locking plate to rotate close to or away from the gear seat; when the chassis is in an initial state, the locking plate is located below the gear seat and abuts against the gear seat. In an adjusting state, the locking plate rotates to be far away from the gear seat, the locking plate is separated from the gear seat, and the bearing piece can rotate relative to the base; in the locking state, the locking plate rotates to enter the gear groove, and the bearing piece is kept at the position where the bearing piece rotates relative to the base. According to the chassis, more labor-saving and smooth chair back tipping locking and unlocking are realized by using a more concise structure.

Description

Technical Field

[0001] The utility model relates to the field of furniture, and particularly relates to a multi-gear backrest tilting and locking chassis. Background Technique

[0002] With the improvement of people's living standards and office conditions, the demand for office chairs is increasing, and the corresponding requirements are also getting higher and higher; in modern office chairs, the chassis is one of the indispensable important components, and the chassis generally integrates multiple functions, such as gas rod lifting, backrest tilting adjustment, etc.; however, many chassis only support the locking and unlocking of the backrest rotation. After unlocking, the backrest can rotate but cannot be maintained at the current angle, and can only be locked when the backrest is roughly vertical. If the user rests, reads a book or plays with the mobile phone on the office chair, they can only be in a fully reclined state, and the arms are difficult to be supported by the armrests, which is easy to cause fatigue.

[0003] In addition, there are some other chassis that can realize the function of locking the backrest at multiple angles. Generally, there are two types of mechanisms for locking the chassis angle. One is the mechanism with a straight insertion of the operating rod, and the locking part is the end of the operating rod. It is necessary to align the operating rod with the locking hole after the backrest rotates to enter, which is very difficult to control, and the position of the locking hole also needs to be considered and it is difficult to be in a reasonable position; the other is the method of controlling the lock piece through the operating rod. The gear piece is set at the rear end of the chassis, and the lock piece moves in the front-rear direction to enter or leave the locking groove of the gear piece. Although the setting position is more reasonable, the required parts are more and the structure is more complex. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a multi-gear backrest tilting and locking chassis, which includes a base configured as the main support body, a carrier connected to the backrest and rotatably arranged on the base, a gear seat arranged on the carrier, a lock piece rotatably arranged on the base, an operating rod slidably inserted on the base, and an elastic connecting piece arranged on the operating rod and connected to the lock piece. When the operating rod is pulled or pushed, the elastic connecting piece drives the lock piece to rotate close to or away from the gear seat; in the initial state of the chassis, the lock piece is located below the gear seat and abuts against the gear seat; in the adjustment state, the lock piece rotates away from the gear seat, and the lock piece is disengaged from the gear seat, and the carrier can rotate relative to the base; in the locked state, the lock piece rotates into the gear slot, and the carrier remains in the position after rotating relative to the base; the chassis realizes more labor-saving and smooth backrest tilting locking and unlocking with a more concise structure.

[0005] The technical solution of the utility model is realized as follows:

[0006] A multi-gear backrest tilting and locking chassis, comprising:

[0007] A base configured as the main support body of the chassis;

[0008] A carrier is rotatably arranged on a base, and the carrier is configured to connect to a chair back.

[0009] A gear position seat is arranged on the carrier; at least one gear position groove is provided on the gear position seat in the vertical direction.

[0010] A locking piece is rotatably arranged on the base.

[0011] An operating rod is horizontally inserted into the base and is slidably arranged on the base in the left - right direction.

[0012] An elastic connecting piece is arranged on the operating rod and is connected to the locking piece. The elastic connecting piece is configured to drive the locking piece to rotate on the base when the operating rod slides.

[0013] It also has an initial state, an adjustment state, and a locking state; in the initial state, the locking piece is located below the gear position seat and abuts against the gear position seat; in the adjustment state, the locking piece rotates away from the gear position seat, and the locking piece is disengaged from the gear position seat, and the carrier can rotate relative to the base; in the locking state, the locking piece rotates and enters the gear position groove, and the carrier remains in the position after rotating relative to the base.

[0014] In this solution, the reclining lock of the chair back is mainly realized by the operating rod, the elastic connecting piece, the locking piece, and the gear position seat. By directly rotatably connecting the locking piece to the base, the locking piece does not require guidance. With the same effect, the structure of this solution is simpler and more compact, and the relative production cost is lower; the locking piece realizes locking and unlocking by rotating to cooperate with the gear position seat. When the operating rod is pulled or pushed, the elastic connecting piece drives the locking piece to rotate. Compared with the locking piece that moves back and forth, when driving the locking piece to rotate in this solution, the force transmission is smoother, making the movement of the elastic connecting piece and the locking piece smoother, with a lower possibility of jamming, and the required driving force is also smaller, which is more labor - saving; the elastic connecting piece also has a buffering effect. Even if the locking piece does not snap into the gear position groove at one time, it can enter the appropriate gear position groove under the action of the elastic force accumulated by the elastic connecting piece after slightly adjusting the rotation of the chair back.

[0015] In this solution, the initial state is the state when the chair back is vertical for a person to sit. In this state, the locking piece does not need to be inserted into the gear position groove of the gear position seat, and the gear position seat directly presses down on the locking piece from top to bottom, thereby preventing the backward reclining of the chair back. In this way, the length of the gear position seat is greatly reduced, thus saving production costs.

[0016] Preferably, the carrier includes a back connector and a seat connector. The back connector is located behind the base and is rotatably provided at the rear end of the base; the back connector is configured to connect to the backrest; the seat connector is located above the base and is rotatably provided on the base; the seat connector is linked with the back connector, and the seat connector is configured to connect to the seat and rotate on the base as the back connector rotates. The seat connector can rotate together with the back connector, so that the seat and the backrest in the seat are linked, thereby eliminating the feeling of rubbing the back.

[0017] Preferably, the seat connector is rotatably connected to the base through a rotating shaft, and the rotating shaft is located beside the operating rod; a pressing piece configured to control the gas rod is provided on the operating rod, and a limiting protrusion is provided on the upper surface of the pressing piece; a limiting spring is sleeved on the rotating shaft, and the limiting spring includes a limiting portion that abuts against the upper surface of the pressing piece. The limiting portion and the limiting protrusion are configured such that when the chassis switches from the adjusted state to the initial state or the locked state, the limiting protrusion switches between the left and right sides of the limiting portion. When the operating rod slides left and right, the limiting protrusion also moves relative to the limiting portion, and the limiting protrusion passes through the limiting portion, making the operating rod have damping when sliding, thereby giving a tactile feedback of the switching state and enabling the user to clearly know whether the operation is completed.

[0018] Preferably, the gear seat is provided on the seat connector and is located between the seat connector and the back connector; a plurality of gear slots are provided on the gear seat in the vertical direction.

[0019] Preferably, a groove is provided on the back connector, and the groove is located below the gear seat. The groove can avoid the locking piece in the initial state, allowing the locking piece to be below the gear seat. In the adjusted state, if the gear seat approaches the back connector, the groove can also be used to accommodate or avoid the gear seat, making the combination tighter and the overall structure more compact and not obtrusive.

[0020] Preferably, the base includes a base plate and a swing seat. The swing seat is rotatably provided on the base plate along the axis in the front-rear direction, and the carrier is rotatably provided on the swing seat; a buffer spring is provided between the swing seat and the base plate. The swing seat can drive the backrest and the seat to swing left and right relative to the base together, making the user's posture on the seat more free; the buffer spring is used for the return and buffering of the swing seat, improving the comfort.

[0021] Preferably, a receiving portion is provided on the swing seat, the receiving portion has a receiving groove, and the locking piece is provided in the receiving groove and is rotatably connected to the receiving portion. The receiving groove of the receiving portion gives the locking piece a limit in the up-down direction, ensuring that the locking piece rotates in the same plane, so that the locking and unlocking operations can be carried out smoothly; and in the locked state, the receiving portion also provides a bearing capacity together to prevent the locking piece from being damaged due to excessive load.

[0022] Preferably, the locking piece includes a locking portion, a rotating portion and a connecting portion. The rotating portion is rotatably connected to the base. The locking portion protrudes backward toward the gear seat and protrudes from the rotating portion. The connecting portion protrudes forward toward the operating rod and protrudes from the rotating portion. A connecting groove is formed in the connecting portion, and the elastic connecting piece is inserted into the connecting groove and connected to the connecting portion. The elastic connecting piece is directly connected to the locking piece, omitting other guiding and transmission structures, making the structure simpler and more reasonable and reducing the production cost.

[0023] Preferably, the elastic connecting piece is a torsion spring. The elastic connecting piece is sleeved on the operating rod. A pressing piece and a snap ring are arranged on the operating rod. The elastic connecting piece is located between the pressing piece and the snap ring. The elastic connecting piece includes a torsion spring arm, and the torsion spring arm of the elastic connecting piece is connected to the locking piece. The pressing piece and the snap ring are used to limit the elastic connecting piece and also serve as driving the elastic connecting piece to slide left and right, thereby driving the locking piece to rotate.

[0024] Preferably, the snap ring is clamped on the operating rod, and the pressing piece is welded to the operating rod.

[0025] The design starting point, concept and beneficial effects of the present utility model adopting the above technical solutions are as follows:

[0026] In this solution, the reclining lock of the backrest is mainly realized by the operating rod, the elastic connecting piece, the locking piece and the gear seat. By directly rotatably connecting the locking piece to the base, the locking piece does not need guidance. Under the same effect, the structure of this solution is simpler and more compact, and the relative production cost is lower. The locking piece realizes locking and unlocking by rotating to cooperate with the gear seat. When the operating rod is pulled, the elastic connecting piece drives the locking piece to rotate. Compared with the locking piece that moves back and forth, when driving the locking piece to rotate in this solution, the force transmission is smoother, making the movement of the elastic connecting piece and the locking piece smoother, with a lower possibility of jamming, and the required driving force is also smaller, which is more labor-saving. The elastic connecting piece also has a buffering effect. Even if the locking piece does not snap into the gear slot at one time, it can enter the appropriate gear slot under the action of the elastic force accumulated by the elastic connecting piece after slightly adjusting the rotation of the backrest.

[0027] In this solution, the initial state is the state when the backrest is vertical for a person to sit. In this state, the locking piece does not need to be inserted into the gear slot of the gear seat. The gear seat directly presses down on the locking piece from top to bottom, thereby preventing the backrest from reclining backward. By this way, the length of the gear seat is greatly reduced, thus saving the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic perspective view of the chassis of the present utility model in an embodiment Figure 1 ;

[0029] Figure 2 is a schematic perspective view of the chassis of the present utility model in an embodiment Figure 2 ;

[0030] Figure 3 This is a cross-sectional view of the chassis in the embodiment of the present utility model;

[0031] Figure 4 This is a three-dimensional structural schematic diagram of the swing seat mounted on the base in the embodiment of the present utility model;

[0032] Figure 5 This is a three-dimensional structural schematic diagram of the interior of the swing seat in the embodiment of the present utility model;

[0033] Figure 6 This is a three-dimensional structural schematic diagram of the lock piece in the embodiment of the present utility model.

[0034] Each reference numeral is: base 1; base 101; swing seat 102; carrier 2; back connecting member 21; seat connecting member 22; gear seat 3; gear slot 4; lock piece 5; locking portion 51; rotating portion 52; connecting portion 53; operating rod 6; elastic connecting member 7; rotating shaft 8; pressing piece 9; limiting projection 10; limiting spring 11; limiting portion 12; snap ring 13; torsion spring arm 14; buffer spring 15; accommodating portion 16; accommodating groove 17; groove 18; connecting groove 19. Detailed implementation manners

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present utility model, the terms "first", "second", "third", etc. are only used for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] The specific implementation manners of the present utility model are as follows:

[0039] As shown in Figures 1-3 Figures 4 and 5, the present utility model provides a multi-gear backrest reclining locking chassis, including:

[0040] A base 1, configured as the main support of the chassis;

[0041] A carrier 2, rotatably arranged on the base 1, and the carrier 2 is configured to connect the backrest;

[0042] The gear position seat 3 is arranged on the bearing member 2; at least one gear position groove 4 is arranged on the gear position seat 3 in the vertical direction;

[0043] The locking piece 5 is rotatably arranged on the base 1;

[0044] The operating rod 6 is horizontally inserted into the base 1 and slidably arranged on the base 1 in the left - right direction;

[0045] The elastic connecting piece 7 is arranged on the operating rod 6 and connected to the locking piece 5. The elastic connecting piece 7 is configured to drive the locking piece 5 to rotate on the base 1 when the operating rod 6 slides;

[0046] It also has an initial state, an adjustment state and a locking state; in the initial state, the locking piece 5 is located below the gear position seat 3 and abuts against the gear position seat 3; in the adjustment state, the locking piece 5 rotates away from the gear position seat 3, and the locking piece 5 is disengaged from the gear position seat 3, and the bearing member 2 can rotate relative to the base 1; in the locking state, the locking piece 5 rotates and enters the gear position groove 4, and the bearing member 2 remains in the position after rotating relative to the base 1.

[0047] In this solution, the backrest reclining lock is mainly realized by the operating rod 6, the elastic connecting piece 7, the locking piece 5 and the gear position seat 3. By directly rotatably connecting the locking piece 5 to the base 1, the locking piece 5 does not need a guide. With the same effect, the structure of this solution is more simple and compact, and the relative production cost is lower; the locking piece 5 realizes locking and unlocking by rotating to cooperate with the gear position seat 3. When the operating rod 6 is pulled, the elastic connecting piece 7 drives the locking piece 5 to rotate. Compared with the locking piece 5 that moves back and forth, when driving the locking piece 5 to rotate in this solution, the force transmission is smoother, making the movement of the elastic connecting piece 7 and the locking piece 5 smoother, with a lower possibility of jamming, and the required driving force is also smaller, which is more labor - saving; the elastic connecting piece 7 also has a buffering effect. Even if the locking piece 5 does not snap into the gear position groove 4 at one time, it can enter the appropriate gear position groove 4 under the action of the elastic force accumulated by the elastic connecting piece 7 after slightly adjusting the rotation of the backrest.

[0048] In this solution, the initial state is the state when the backrest is vertical for a person to sit. In this state, the locking piece 5 does not need to be inserted into the gear position groove 4 of the gear position seat 3, and the gear position seat 3 directly presses down on the locking piece 5 from top to bottom, thereby preventing the backrest from reclining backward. In this way, the length of the gear position seat 3 is greatly reduced, thus saving production costs.

[0049] Specifically, the carrier 2 includes a back connecting member 21 and a seat connecting member 22. The back connecting member 21 is located behind the base 1 and is rotatably provided at the rear end of the base 1; the back connecting member 21 is configured to connect the backrest; the seat connecting member 22 is located above the base 1 and is rotatably provided on the base 1; the seat connecting member 22 is linked with the back connecting member 21, and the seat connecting member 22 is configured to connect the seat and rotate on the base 1 as the back connecting member 21 rotates; the seat connecting member 22 can rotate together with the back connecting member 21, so that the seat and the backrest in the seat are linked, thereby eliminating the feeling of rubbing the back. Further, the seat connecting member 22 is rotatably connected to the base 1 through a rotating shaft 8, and the rotating shaft 8 is located beside the operating rod 6; a pressing piece 9 configured to control the gas rod is provided on the operating rod 6, and a limiting protrusion 10 is provided on the upper surface of the pressing piece 9; a limiting spring 11 is sleeved on the rotating shaft 8, and the limiting spring 11 includes a limiting portion 12, and the limiting portion 12 abuts against the upper surface of the pressing piece 9. The limiting portion 12 and the limiting protrusion 10 are configured such that when the chassis switches from the adjusted state to the initial state or the locked state, the limiting protrusion 10 switches on the left and right sides of the limiting portion 12; when the operating rod 6 slides left and right, the limiting protrusion 10 also moves relative to the limiting portion 12, and the limiting protrusion 10 passes through the limiting portion 12, so that the operating rod 6 has damping when sliding, thereby giving a tactile feedback of the switching state, enabling the user to clearly know whether the operation is completed.

[0050] The elastic connecting member 7 is a torsion spring. The elastic connecting member 7 is sleeved on the operating rod 6. A snap ring 13 is further provided on the operating rod 6 beside the pressing piece 9. The snap ring 13 is clamped on the operating rod 6, and the pressing piece 9 is welded to the operating rod 6; the snap ring 13 and the pressing piece 9 are arranged at intervals, and the elastic connecting member 7 is located between the pressing piece 9 and the snap ring 13; the elastic connecting member 7 includes a torsion spring arm 14, and the torsion spring arm 14 of the elastic connecting member 7 is connected to the locking piece 5; the pressing piece 9 and the snap ring 13 are used to limit the elastic connecting member 7 and also serve as driving the elastic connecting member 7 to slide left and right, thereby driving the locking piece 5 to rotate.

[0051] As Figures 3-5 shown, the base 1 includes a base 101 and a swinging seat 102. The swinging seat 102 is rotatably provided on the base 1 along the axis in the front-rear direction, and the carrier 2 is rotatably provided on the swinging seat 102; a buffer spring 15 is provided between the swinging seat 102 and the base 101; the swinging seat 102 can drive the backrest and the seat to swing left and right relative to the base 1 together, and the user's posture on the seat is more free; the buffer spring 15 is used for the return and buffering of the swinging seat 102, improving the comfort; a receiving portion 16 is provided on the swinging seat 102, the receiving portion 16 has a receiving groove 17, and the locking piece 5 is arranged in the receiving groove 17 and is rotatably connected to the receiving portion 16; the receiving groove 17 of the receiving portion 16 gives the locking piece 5 a limit in the up-down direction, ensuring that the locking piece 5 rotates in the same plane, so that the locking and unlocking operations can be carried out smoothly; and in the locked state, the receiving portion 16 also provides a bearing capacity together to prevent the locking piece 5 from being damaged due to excessive load.

[0052] The gear position seat 3 is arranged on the seat connecting piece 22 and located between the seat connecting piece 22 and the back connecting piece 21; a plurality of gear position grooves 4 are arranged on the gear position seat 3 in the vertical direction; in this embodiment, there are two gear position grooves 4 in total. Therefore, except for the initial state, there are two locking states, that is, when the lock piece 5 enters these two gear position grooves 4 respectively, the back connecting piece 21 is also kept at corresponding different rotation angles; a groove 18 is arranged on the back connecting piece 21, and the groove 18 is located below the gear position seat 3; the groove 18 can avoid the lock piece 5 in the initial state, so that the lock piece 5 is located below the gear position seat 3. In the adjustment state, if the gear position seat 3 approaches the back connecting piece 21, the groove 18 can also be used to accommodate or avoid the gear position seat 3, making the combination closer and the overall structure more compact and not obtrusive.

[0053] As Figure 6 shown, the lock piece 5 includes a locking part 51, a rotating part 52 and a connecting part 53. The rotating part 52 is rotatably connected to the base 1. The locking part 51 protrudes backward toward the gear position seat 3 from the rotating part 52. The connecting part 53 protrudes forward toward the operating rod 6 from the rotating part 52, and the connecting part 53 protrudes backward from the accommodating groove 17 and enters between the swinging seat 102 and the base 101; a connecting groove 19 is formed on the connecting part 53, and the torsion spring arm 14 of the elastic connecting piece 7 is inserted into the connecting groove 19 to be connected with the connecting part 53; the elastic connecting piece 7 is directly connected to the lock piece 5, omitting other guiding and transmission structures, making the structure simpler and more reasonable and reducing the production cost.

Claims

1. A multi-position seat back tilt locking chassis, characterized in that: include: A base configured as a main support body of the chassis; A bearing member is rotatably disposed on the base, and the bearing member is configured to be connected to the chair back; The gear seat is arranged on the bearing member; the gear seat is provided with at least one gear slot in the vertical direction; A locking piece, rotatably arranged on the base; An operating rod is inserted into the base laterally and is slidably arranged on the base in a left-right direction; An elastic connecting member, which is arranged on the operating rod and connected to the locking piece, and the elastic connecting member is configured to drive the locking piece to rotate on the base when the operating rod slides; It also has an initial state, an adjustment state and a locked state; in the initial state, the locking plate is located below the gear seat and abuts against the gear seat; in the adjustment state, the locking plate rotates away from the gear seat, the locking plate is disengaged from the gear seat, and the bearing member can rotate relative to the base; in the locked state, the locking plate rotates and enters the gear slot, and the bearing member remains in the position after rotation relative to the base.

2. The multi-position seat back tilt locking chassis according to claim 1, characterized in that: The supporting member includes a back connecting member and a seat connecting member. The back connecting member is located behind the base and is rotatably set at the rear end of the base; the back connecting member is configured to connect the chair back; the seat connecting member is located above the base and is rotatably set on the base; the seat connecting member is linked with the back connecting member, and the seat connecting member is configured to connect the chair seat and rotate on the base as the back connecting member rotates.

3. The multi-position seat back tilt locking chassis according to claim 2, characterized in that: The seat connector is rotatably connected to the base via a rotating shaft, and the rotating shaft is located beside the operating lever; the operating lever is provided with a pressure plate configured to control the gas rod, and a limiting protrusion is provided on the upper surface of the pressure plate; a limiting spring is sleeved on the rotating shaft, and the limiting spring includes a limiting part, which abuts against the upper surface of the pressing plate, and the limiting part and the limiting protrusion are configured so that when the chassis is switched from the adjustment state to the initial state or the locking state, the limiting protrusion switches between the left and right sides of the limiting part.

4. The multi-position seat back tilt locking chassis according to claim 2, characterized in that: The gear seat is arranged on the seat connecting member and is located between the seat connecting member and the back connecting member; a plurality of gear slots are arranged on the gear seat along the vertical direction.

5. The multi-position seat back tilt locking chassis according to claim 4, characterized in that: The back connecting piece is provided with a groove, and the groove is located below the gear seat.

6. The multi-position seat back tilt locking chassis according to claim 2, characterized in that: The base comprises a pedestal and a swinging seat, the swinging seat is rotatably arranged on the pedestal along an axis in the front-rear direction, and the bearing member is rotatably arranged on the swinging seat; a buffer spring is arranged between the swinging seat and the pedestal.

7. The multi-position seat back tilt locking chassis according to claim 6, characterized in that: The swing seat is provided with a receiving portion, the receiving portion has a receiving groove, the locking piece is arranged in the receiving groove and is rotatably connected with the receiving portion.

8. The multi-position seat back tilt locking chassis according to claim 1, characterized in that: The locking piece includes a locking portion, a rotating portion and a connecting portion. The rotating portion is rotatably connected to the base, the locking portion protrudes backward from the rotating portion toward the gear seat, and the connecting portion protrudes forward from the rotating portion toward the operating rod. A connecting groove is provided on the connecting portion, and an elastic connecting piece is inserted in the connecting groove and connected to the connecting portion.

9. The multi-position seat back tilt locking chassis according to claim 1, characterized in that: The elastic connector is a torsion spring, which is sleeved on the operating rod. The operating rod is provided with a pressing plate and a clamping ring, and the elastic connector is located between the pressing plate and the clamping ring; the elastic connector includes a torsion spring arm, and the torsion spring arm of the elastic connector is connected to the locking plate.

10. The multi-position seat back tilt locking chassis according to claim 9, characterized in that: The clamping ring is clamped on the operating rod, and the pressing sheet is welded on the operating rod.

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