Swing assembly, locking mechanism and tray

Abstract

The utility model provides a swing assembly of a chassis, a locking mechanism and a tray, the swing assembly comprises a main shaft and a movement assembly, the movement assembly comprises a first movement piece, a track seat and a second movement piece which synchronously rotate around the main shaft; the locking mechanism comprises the swing assembly and has an adjusting state and a locking state, in the adjusting state, the first moving part is separated from the second moving part, and the chair back can rotate and drive the first moving part to move in the adjusting direction and rotate relative to the main shaft; the locking mechanism is applied to the chassis; in the locking state, the first moving part and the second moving part are combined and locked so as to lock the current tipping angle of the chair back; the whole motion components are linked with one another and rotate relative to the main shaft to realize adaptive swing, so that motion interference and jamming are prevented; locking of a friction plate in the prior art is replaced by structural locking, the problems of failure, noise and the like caused by abrasion are solved, operation is easier, the structure is simple, and cost is kept at a low level.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a swing assembly, a locking mechanism and a tray. Background Art

[0002] In modern office chairs, trays are an important and indispensable component. Trays generally integrate multiple functions, such as gas rod lifting, chair back tilt adjustment, etc. For office chairs of different grades, the functions and costs of the trays used are also different. Some manufacturers will design more expensive and more functional trays for high-end office chairs. It is inevitable that some manufacturers will choose trays with simpler structures and functions in order to pursue lower costs.

[0003] There is an office chair tray which only has the functions of gas rod lifting and seat back tilt adjustment. It has a simple structure and a lower price, and is very suitable for low-priced seats, such as the trays disclosed in US Pat. Nos. US07518378 and US10684157.

[0004] In this type of tray, the method of pressing the friction plate is used to achieve the reclining locking of the seat back. When the friction plate is released, the seat back can rotate relative to the tray, and when the friction plate is locked, the seat back can remain stationary relative to the tray. Although the friction plate locking method can simply and cost-effectively lock the seat back in any reclining position, this method is more laborious to operate, and the user needs to expend greater effort when unlocking and bending the operating lever. Moreover, it will wear out over time, causing the friction plate to produce noise when moving, and even causing the locking to fail.

[0005] The problem of friction locking can be solved by using structural locking instead. However, if a structural locking mechanism is to be used, it is necessary to find a reasonable movement method to overcome the problem of movement interference while ensuring a low cost. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the utility model provides a swinging assembly for chair back tilting, comprising a main shaft and a moving assembly, wherein the moving assembly is rotatably arranged on the main shaft and swings on the main shaft; the first moving part and the second moving part in the moving assembly move along different tracks of the track seat, but the first moving part, the track seat and the second moving part are synchronously rotated together, when the first moving part slides in the first sliding track of the track seat and drives the track seat to rotate around the main shaft, the second moving part also rotates synchronously, and the entire moving assembly is linked together and rotates relative to the main shaft to achieve adaptive swinging, thereby preventing motion interference and jamming.

[0007] Furthermore, a locking mechanism is provided, which includes the above-mentioned swinging assembly, has an adjusting direction and a locking direction, and also has an adjusting state and a locking state. In the adjusting state, the first moving member and the second moving member are disengaged, and the chair back can rotate and drive the first moving member to move in the adjusting direction and rotate relative to the main shaft. In the locking state, the first moving member and the second moving member are combined and locked to lock the current reclining angle of the chair back. By using the structural locking of this mechanism to replace the locking of the friction plate in the prior art, problems such as failure and noise caused by wear can be solved, and the operation is more relaxed, the structure is simple, and the cost is also maintained at a relatively low level.

[0008] Furthermore, a tray applying the above-mentioned locking mechanism is provided, which includes a base, a chair back connecting member, and the above-mentioned chair back reclining locking mechanism. The base serves as the main support body, and both the chair back connecting member and the chair back reclining locking mechanism are arranged on the base. The chair back connecting member is used to connect the chair back, and the chair back reclining locking mechanism and the chair back connecting member are linked through a linkage member, so that when the chair back reclines under the action of a human body, the chair back connecting member can drive the locking mechanism to perform linkage.

[0009] The technical solution of the present utility model is realized as follows:

[0010] A swinging assembly for chair back reclining includes a main shaft and a moving assembly. The moving assembly is rotatably arranged on the main shaft and swings on the main shaft. The moving assembly includes an orbit base and a first moving member and a second moving member arranged on the orbit base. The orbit base includes a first sliding orbit and a second sliding orbit that are perpendicular to each other. The first moving member and the second moving member slide in the first sliding orbit and the second sliding orbit respectively. The first moving member is in contact with the first sliding orbit until the first moving member can rotate synchronously with the orbit base relative to the main shaft. The second moving member is in contact with the second sliding orbit until the second moving member can rotate synchronously with the orbit base relative to the main shaft. The first moving member or the second moving member is sleeved on the main shaft and rotatably connected to the main shaft.

[0011] Since the moving assembly is integrally rotatably arranged on the main shaft, and both the first moving member and the second moving member are cooperated with the orbit base to rotate synchronously relative to the main shaft, when any one of the first moving member or the second moving member rotates relative to the main shaft in addition to sliding, it will drive the orbit base to rotate synchronously and simultaneously drive the other of the first moving member or the second moving member to rotate synchronously. The entire moving assembly is interlocked and rotates relative to the main shaft together to achieve adaptive swinging, thereby preventing movement interference and jamming. In the orbit base, the first sliding orbit is in contact with the first moving member, which can not only make the first moving member rotate synchronously with the orbit base, but also effectively remove the ineffective swinging of the first moving member, that is, prevent the first moving member from swinging other than sliding and rotating, provide effective limit for the first moving member, and make the movement of the entire moving assembly more smooth.

[0012] Preferably, the track base is through-slotted to form a first sliding track. The first moving member has a first limiting surface and a second limiting surface. The first limiting surface is in contact with the upper groove wall of the first sliding track, and the second limiting surface is in contact with the lower groove wall of the first sliding track. The limiting of the track base and the first moving member is achieved by the contact of the first limiting surface and the second limiting surface of the first moving member with the upper groove wall and the lower groove wall of the first sliding track. The first moving member can only slide relative to the track base. When the first moving member rotates, the track base will rotate along with it; and the width of the first sliding track is the same as the thickness of the first moving member.

[0013] Preferably, the main shaft is arranged in the left-right direction, the second sliding track is arranged in the left-right direction, the second moving member is sleeved on the main shaft, the track base is sleeved on the second moving member and the second moving member is slidably arranged in the second sliding track. There is a rotational limit between the second moving member and the track base. When the first moving member moves, it drives the track base to rotate, and the second moving member also rotates along with the track base. The first moving member, the second moving member and the track base all rotate synchronously with the main shaft.

[0014] A backrest reclining locking mechanism includes the swing assembly as described above; it has an adjustment direction and a locking direction. The adjustment direction coincides with the first sliding track, and the locking direction coincides with the second sliding track. The first moving member moves along with the rotation of the backrest in the adjustment direction, and the second moving member moves in the locking direction, and locks the first moving member when the second moving member approaches the first moving member or unlocks the first moving member when it leaves the first moving member; it also has an adjustment state and a locking state. In the adjustment state, the first moving member and the second moving member are disengaged, and the backrest can rotate and drive the first moving member to move in the adjustment direction and rotate relative to the main shaft; in the locking state, the first moving member and the second moving member are combined and locked to lock the current reclining angle of the backrest.

[0015] By using the structural locking of this mechanism to replace the locking of the friction plate in the prior art, problems such as failure and noise caused by wear can be solved, and it is easier to operate, has a simple structure, and the cost is also maintained at a relatively low level.

[0016] Preferably, in the adjustment state, when the backrest rotates, the adjustment direction tilts along with the swing of the movement assembly. When the backrest rotates and drives the first moving member to move, in addition to displacement, the first moving member will also rotate due to the rotation of the backrest. When the first moving member rotates, it will drive the entire movement assembly to rotate on the main shaft. The adaptive ability of this mechanism is strong, so that the reclining locking after the backrest rotates can be successfully achieved; the tilt of the adjustment direction is also an embodiment of the adaptive ability.

[0017] Preferably, the axial direction of the main shaft coincides with the locking direction. The second moving member is sleeved on the main shaft and is slidably engaged with the main shaft in the second sliding track. The second moving member moves in the locking direction. Since the second moving member is slidably arranged on the main shaft, after the first moving member moves, the second moving member moves along the axial direction of the main shaft and can be connected to the first moving member to lock the reclining of the backrest and maintain it at the current position.

[0018] Preferably, the main shaft is a metal part. The force on the backrest will be transmitted to the main shaft. The main shaft being a metal part can ensure the strength and supporting ability of the main shaft, making the locking mechanism have a long service life and not be easily damaged.

[0019] Preferably, the second moving member is a metal part. The second moving member includes a locking portion and a sliding portion. The sliding portion is arranged in the second sliding track and fits with the second sliding track. The locking portion is used to engage and lock with the first moving member when approaching the first moving member; the locking portion and the sliding portion are integrally formed. The second moving member is also one of the force-bearing parts, so it is made of metal to increase strength; the locking portion and the sliding portion can be integrally formed, which is more convenient for manufacturing.

[0020] Preferably, the second moving member includes a locking portion and a sliding portion. The sliding portion is arranged in the second sliding track and fits with the second sliding track. The locking portion is used to engage and lock with the first moving member when approaching the first moving member; the locking portion and the sliding portion are spliced together, and the locking portion is a metal part and the sliding portion is a plastic part. The locking portion is the main force-bearing part, and the sliding portion mainly plays a role in guiding and cooperating with the track seat. Therefore, the locking portion being a metal part can reduce costs; at the same time, the assembly of the locking portion and the sliding portion is relatively simple, which is beneficial to production and will not lead to a decline in production efficiency.

[0021] Preferably, the first moving member is provided with a receiving groove in the locking direction, and the receiving groove extends along the length direction of the first moving member; an internal tooth portion is provided in the receiving groove, and an external tooth portion is provided on the second moving member. In the locked state, the first moving member enters the receiving groove and the first moving member and the second moving member are locked by meshing of the internal tooth portion and the external tooth portion. The length direction of the first moving member is the adjustment direction. When the first moving member moves in the adjustment direction, the position of the second moving member corresponding to the receiving groove will also change. When the second moving member is at different positions in the receiving groove and the internal tooth portion and the external tooth portion are meshed, the locking of the backrest at different reclining positions is realized; and the internal tooth portion is provided on the first moving member and is located in the receiving groove. When the backrest reclines, there is only planar friction between the first moving member and the track, and the wear between them is small. More importantly, it will not cause wear to the internal tooth portion, extending the service life of the mechanism; when the external tooth portion is provided on the first moving member instead of the internal tooth portion, the receiving groove of the first moving member can no longer be slidably rotated with the main shaft, and the first moving member needs to be indirectly slidably rotated with the main shaft through the track seat that fits with its outer surface.

[0022] Preferably, the density of the inner tooth part is greater than 55 teeth per 100 mm. The fine teeth and dense teeth achieve stepless adjustment of the feeling.

[0023] Preferably, the track base is formed by splicing two symmetrically arranged left and right track parts.

[0024] A tray includes a base, a backrest connecting member, and the backrest reclining locking mechanism as described above. The backrest reclining locking mechanism is rotatably arranged on the base. The main shaft is arranged on the base in the left - right direction. A linkage member is provided between the backrest reclining locking mechanism and the backrest connecting member. The linkage member is configured such that when the backrest connecting member rotates relative to the base, the moving assembly rotates on the main shaft; when the backrest reclining locking mechanism is in the adjustment state, the backrest connecting member can rotate relative to the base; when the backrest reclining locking mechanism is in the locking state, the backrest reclining locking mechanism locks the rotation between the backrest connecting member and the base and keeps the backrest connecting member in the rotated position.

[0025] The backrest reclining locking mechanism is used in the tray to achieve the effect of backrest reclining locking; the base serves as the main support body, both the backrest connecting member and the backrest reclining locking mechanism are arranged on the base. The backrest connecting member is used to connect the backrest. The backrest reclining locking mechanism and the backrest connecting member are linked through a linkage member, so that when the backrest reclines under the action of the human body, the backrest connecting member can drive the locking mechanism to move. Among them, the first moving member will slide and rotate with the movement of the backrest connecting member, and the relative position between the first moving member and the second moving member changes; when the second moving member and the first moving member are locked by the inner tooth part and the outer tooth part, the backrest and the backrest connecting member can be locked at the current reclining angle, and the moving assembly can swing adaptively on the main shaft to prevent interference during backrest reclining.

[0026] Preferably, the base has an installation groove that opens upward, and the backrest reclining locking mechanism is arranged in the installation groove. For a general base, its volume is sufficient to accommodate the locking mechanism, thus realizing an under - surrounded tray. The internal structure of the tray is not exposed, and the appearance is better. Moreover, in terms of service life and safety, it is not easy for sundries to enter the inside of the tray and cause damage to the tray. Similarly, the user's hand cannot enter the inside of the tray to cause pinching, which is safer.

[0027] Preferably, it further includes an operating rod. The operating rod is inserted into the base in the left - right direction. A transmission member is provided between the operating rod and the second moving member. The operating rod is configured such that pulling the operating rod drives the transmission member to move, and the transmission member drives the second moving member to slide in the second sliding track, and makes the backrest reclining locking mechanism switch between the adjustment state and the locking state. By simply pulling the operating rod left and right, the switching between locking and unlocking in the locking mechanism can be realized. The operation is not only easy, but also within the reach of the user, which is more convenient.

[0028] Preferably, the transmission member is a torsion spring, which is rotatably arranged on the base, and both ends of the torsion spring are respectively connected to the operating rod and the second moving member. Selecting the torsion spring as the transmission member not only has a low cost, but also makes the structures of components such as the mounting seat of the torsion spring in the tray simpler; the torsion spring as the transmission member also has a buffering effect during locking: when locking the first moving member and the second moving member, in the case where the inner tooth part and the outer tooth part are not completely aligned and engaged, not only can the operation still be pulled, but also the pulling will not be more laborious, and after the backrest tilts slightly, the second moving member can be automatically locked into the first moving member, that is, the inner tooth part and the outer tooth part can be engaged with a delay without affecting the operation.

[0029] Preferably, an avoidance groove extending along the locking direction is formed on the track seat outside the second moving member, and a slot is formed on the second moving member. One torsion spring arm at one end of the torsion spring passes through the avoidance groove and is inserted into the slot; the avoidance groove is configured to drive the second moving member to move in the second sliding track when pulling the operating rod, and the avoidance groove avoids the movement of the torsion spring arm.

[0030] Preferably, the linkage member is a connecting pin, and the connecting pin is inserted on the first moving member and the backrest connecting member, and the first moving member and the backrest connecting member are rotatably connected through the connecting pin.

[0031] Preferably, the linkage member includes a seat connecting member, a connecting pin and a rotating sliding shaft. The seat connecting member is rotatably arranged on the base, the connecting pin is inserted through the seat connecting member and the first moving member, and the first moving member and the seat connecting member are rotatably connected through the connecting pin; the rotating sliding shaft is arranged on the seat connecting member, a sliding groove is formed on the backrest connecting member, and the rotating sliding shaft is inserted into the sliding groove. The rotating sliding shaft and the sliding groove are configured to link the backrest connecting member and the seat connecting member, and when the backrest connecting member rotates relative to the base, it drives the seat connecting member to rotate relative to the base. The tray in this solution can realize the linkage of the seat and the backrest. When the backrest tilts, it drives the seat to rotate relative to the base, thereby reducing the feeling of rubbing the back and improving the comfort.

[0032] Preferably, the backrest tilt locking mechanism is vertically arranged in the tray, and the first moving member is vertical and inclined in the front-back direction; when the backrest connecting member rotates backward, the first moving member drives the track seat to swing and slide downward in the track seat. In such a tray with seat-back linkage, the volume of the base, that is, the internal space of the tray is small, and the thickness of the base is also small, making it difficult to accommodate the above locking mechanism. Therefore, for such a tray that is not easy to accommodate, the locking mechanism originally arranged in the front-back direction can be changed to the up-down direction arrangement, and the backrest tilt locking can also be achieved.

[0033] Preferably, the base includes an extended seat protruding downward, the main shaft is arranged on the extended seat, and the track seat is arranged in the extended seat. The extended seat is used to increase the volume of the base in the up-down direction, so that the vertically arranged locking mechanism can be smoothly installed on the base.

[0034] The design starting point, concept and beneficial effects of the present utility model adopting the above technical solutions are as follows:

[0035] Since the moving assembly is integrally rotatably arranged on the main shaft, and both the first moving member and the second moving member are cooperated with the track seat to rotate synchronously relative to the main shaft. When any one of the first moving member or the second moving member generates rotation relative to the main shaft in addition to sliding, it will drive the track seat to rotate synchronously, and at the same time drive the other one of the first moving member or the second moving member to rotate synchronously. The entire moving assembly is interlocked and rotates relative to the main shaft together to achieve adaptive swinging, thereby preventing movement interference and jamming. In the track seat, the first sliding track fits with the first moving member, which can not only make the first moving member rotate synchronously with the track seat, but also effectively eliminate the ineffective swinging of the first moving member, that is, prevent the swinging of the first moving member other than sliding and rotation, provide effective limit for the first moving member, and make the movement of the entire moving assembly smoother.

[0036] By using this structure locking of the above locking mechanism to replace the locking of the friction plate in the prior art, the problems such as failure and noise caused by wear are solved, and the operation is easier, the structure is simple, and the cost is also maintained at a relatively low level. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic perspective structure of the tray in Embodiment 1 of the present utility model Figure 1 ;

[0038] Figure 2 Schematic perspective structure of the tray in Embodiment 1 of the present utility model Figure 2 ;

[0039] Figure 3 Schematic perspective structure diagram of the swinging assembly in Embodiment 1 of the present utility model;

[0040] Figure 4 Cross-sectional view of the swinging assembly in Embodiment 1 of the present utility model;

[0041] Figure 5 Schematic perspective structure diagram of the swinging assembly in the locked state in Embodiment 1 of the present utility model;

[0042] Figure 6 Schematic perspective structure diagram of the swinging assembly in the adjusted state in Embodiment 1 of the present utility model;

[0043] Figure 7 Side view of the locking mechanism when the backrest connecting member is not reclined in Embodiment 1 of the present utility model;

[0044] Figure 8Side view of the reclining locking mechanism of the backrest connecting member in Embodiment 1 of the present utility model;

[0045] Figure 9 Schematic perspective view of the track base in Embodiment 1 of the present utility model;

[0046] Figure 10 Schematic perspective view of the track portion in Embodiment 1 of the present utility model;

[0047] Figure 11 Cross-sectional view of the track base in Embodiment 1 of the present utility model;

[0048] Figure 12 Schematic perspective view of the second moving member in Embodiment 1 of the present utility model;

[0049] Figure 13 Schematic perspective view of the first moving member in Embodiment 1 of the present utility model;

[0050] Figure 14 Exploded view of the swing assembly in Embodiment 1 of the present utility model;

[0051] Figure 15 Schematic perspective view of the tray in Embodiment 2 of the present utility model Figure 1 ;

[0052] Figure 16 Schematic perspective view of the tray in Embodiment 2 of the present utility model Figure 2 ;

[0053] Figure 17 Internal structure schematic diagram of the tray in Embodiment 2 of the present utility model.

[0054] Each reference numeral is: main shaft 1; track base 2; track portion 20; main body portion 201; clamping portion 202; first groove 203; second groove 204; third groove 205; first moving member 3; first limiting surface 31; second limiting surface 32; second moving member 4; locking portion 41; sliding portion 42; first sliding track 5; second sliding track 6; base 7; backrest connecting member 8; connecting pin 9; mounting groove 10; elastic buckle 11; card hole 12; accommodating groove 13; internal tooth portion 14; external tooth portion 15;

[0055] Operating rod 16; torsion spring 17; avoidance groove 18; slot 19; seat connecting member 21; rotating sliding shaft 22; sliding groove 23; extending seat 24.

[0056] 1 - 3, 5, 6, 12, 14 Detailed implementation manners

[0057] 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 accompanying drawings and specific embodiments. 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.

[0058] 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.

[0059] In the description of the present utility model, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] The specific embodiments of the present utility model are as follows: Embodiment

[0061] As Figures 3 - 8 shown in FIGS. 14, the present utility model provides a swing assembly for the reclining of a chair back, including a main shaft 1 and a motion assembly. The motion assembly is rotatably arranged on the main shaft 1 and swings on the main shaft 1. The motion assembly includes a track seat 2 and a first motion member 3 and a second motion member 4 arranged on the track seat 2. The track seat 2 includes a first sliding track 5 and a second sliding track 6 that are perpendicular to each other. The first motion member 3 and the second motion member 4 slide in the first sliding track 5 and the second sliding track 6 respectively. The first motion member 3 is in contact with the first sliding track 5 until the first motion member 3 can rotate synchronously with the track seat 2 relative to the main shaft 1. The second motion member 4 is in contact with the second sliding track 6 until the second motion member 4 can rotate synchronously with the track seat 2 relative to the main shaft 1. The first motion member 3 or the second motion member 4 is sleeved on the main shaft 1 and rotatably connected to the main shaft 1.

[0062] Since the motion assembly is integrally rotatably arranged on the main shaft 1, and both the first motion member 3 and the second motion member 4 are cooperated with the track seat 2 to rotate synchronously relative to the main shaft 1, when any one of the first motion member 3 or the second motion member 4 rotates relative to the main shaft 1 in addition to sliding, it will drive the track seat 2 to rotate synchronously and at the same time drive the other of the first motion member 3 or the second motion member 4 to rotate synchronously. The entire motion assembly is interlocked and rotates relative to the main shaft 1 together to achieve adaptive swinging, thereby preventing motion interference and jamming.

[0063] As Figure 1 shown in FIGS. 2As shown, the swing assembly for the backrest reclining is applied to a backrest reclining locking mechanism, which is applied to a tray. The tray includes a base 7 configured for main body support, a backrest reclining locking mechanism, and a backrest connecting member 8 connected to the first moving member 3. The main shaft 1 is arranged on the base 7 in the left-right direction. The backrest connecting member 8 is rotatably connected to the rear end of the base 7. A linkage member is provided between the backrest reclining locking mechanism and the backrest connecting member 8. The linkage member is configured such that when the backrest connecting member 8 rotates relative to the base 7, the moving assembly rotates on the main shaft 1. In this embodiment, the linkage member is a connecting pin 9. The front end of the backrest connecting member 8 and the rear end of the first moving member 3 are rotatably connected by a connecting pin 9. The connecting pin 9 is inserted into the rear end of the first moving member 3 and the front end of the backrest connecting member 8. The backrest connecting member 8 is configured to connect the backrest. When the backrest reclining locking mechanism is in the adjustment state, the backrest connecting member can rotate relative to the base. When the backrest reclining locking mechanism is in the locked state, the backrest reclining locking mechanism locks the rotation between the backrest connecting member and the base and makes the backrest connecting member stay at the rotated position.

[0064] As Figures 5 - 8 shown, the backrest reclining locking mechanism has an adjustment direction and a locking direction. The adjustment direction coincides with the first sliding track 5, and the locking direction coincides with the second sliding track 6. The first moving member 3 moves along with the rotation of the backrest in the adjustment direction. The second moving member 4 moves in the locking direction and locks the first moving member 3 when the second moving member 4 approaches the first moving member 3 or unlocks the first moving member 3 when it leaves the first moving member 3. It also has an adjustment state and a locked state. In the adjustment state, the first moving member 3 and the second moving member 4 are disengaged, and the backrest can rotate and drive the first moving member 3 to move in the adjustment direction and rotate relative to the main shaft 1. In the locked state, the first moving member 3 and the second moving member 4 are combined and locked to lock the current reclining angle of the backrest.

[0065] By locking this mechanism to replace the locking of the friction plate in the prior art, problems such as failure and noise caused by wear can be solved, and it is easier to operate, has a simple structure, and the cost is also maintained at a relatively low level.

[0066] Specifically, as Figure 1 、 2As shown in FIGS. 9 and 10, the base 7 is open upward to form an installation groove 10 for accommodating the moving components. The main shaft 1 is arranged on the base 7 in the left-right direction and then runs across the installation groove 10. The rail seat 2, the first moving member 3 and the second moving member 4 are all located in the installation groove 10. The rail seat 2 is formed by splicing two symmetric rail parts 20 in the left-right direction. The rail part 20 includes a main body part 201 and a clamping part 202. The clamping part 202 protrudes upward and downward from the main body part 201. When located in the installation groove 10, the main body part 201 is closer to the base 7 than the clamping part 202, and the clamping part 202 is closer to the center of the base 7. When the two rail parts 20 are spliced, the two clamping parts 202 are abutted against each other. The surface of the clamping part 202 facing each other is recessed to form a first groove 203. The first groove 203 extends in the front-back direction. After the two rail parts 20 are spliced, the two first grooves 203 together form the first sliding rail 5. Therefore, the rail seat 2 is grooved through in the front-back direction to form the first sliding rail 5.

[0067] As shown in Figures 10 - 12 FIGS. 14, a second groove 204 and a third groove 205 are formed in the main body part 201 in the left-right direction. The third groove 205 is closer to the clamping part 202 than the second groove 204. The second sliding rail 6 is the second groove 204. The second moving member 4 includes a locking part 41 and a sliding part 42. The sliding part 42 is arranged in the second groove 204. The shape of the second groove 204 is configured to make the sliding part 42 fit with the second groove 204, that is, the edge of the sliding part 42 fits with the second sliding rail 6. The locking part 41 is arranged in the third groove 205. The shape of the third groove 205 is adapted to the locking part 41, so that the locking part 41 can completely enter the third groove 205. The locking part 41 is used to be combined and locked with the first moving member 3 when approaching the first moving member 3. The locking part 41 and the sliding part 42 are spliced together, and the two are connected by an elastic buckle 11 and a card hole 12. The locking part 41 is a metal plate part, and the card hole 12 is formed thereon. The sliding part 42 is a plastic part formed by injection molding, and the elastic buckle 11 is formed on the sliding part 42. The locking part 41 is the main force-bearing part, and the sliding part 42 mainly plays a role in guiding and cooperating with the rail seat 2. Therefore, the locking part 41 can be a metal part, which can reduce the cost. At the same time, the assembly of the locking part 41 and the sliding part 42 is relatively simple, which is beneficial to production and will not lead to a decline in production efficiency. In addition, the main shaft 1 and the first moving member 3 are also the main force-bearing parts, so they are also metal parts. The force on the backrest will be transmitted to the main shaft 1 through the first moving member 3 and the second moving member 4. The first moving member 3 and the main shaft 1 being metal parts can ensure strength and supporting ability, so that the locking mechanism has a long service life and is not easily damaged.

[0068] Further, as shown in Figure 3 FIGS. 4As shown in FIGS. 13, the first moving member 3 has a first limiting surface 31 and a second limiting surface 32. The first limiting surface 31 is in contact with the upper groove wall of the first sliding track 5, and the second limiting surface 32 is in contact with the lower groove wall of the first sliding track 5. The limiting between the track base 2 and the first moving member 3 is achieved by the contact between the first limiting surface 31 and the second limiting surface 32 of the first moving member 3 and the upper and lower groove walls of the first sliding track 5. The first moving member 3 can only slide relative to the track base 2. When the first moving member 3 rotates, the track base 2 will rotate together with it.

[0069] Similarly, the sliding portion 42 of the second moving member 4 is in contact with the second sliding track 6. When the track base 2 rotates, it will drive the second moving member 4 to rotate around the main shaft 1 together. The main shaft 1 is arranged in the left - right direction, the second sliding track 6 is arranged in the left - right direction, the second moving member 4 is sleeved on the main shaft 1, the track base 2 is sleeved on the second moving member 4 and the second moving member 4 is slidably arranged in the second sliding track 6. Therefore, there is a rotational limit between the second moving member 4 and the track base 2. When the first moving member 3 moves, it drives the track base 2 to rotate, and the second moving member 4 also rotates together with the track base 2. The first moving member 3, the second moving member 4 and the track base 2 all rotate synchronously with the main shaft 1.

[0070] In summary, the first moving member 3 mainly moves in the front - back direction. However, when the backrest tilts and the backrest connecting member 8 rotates, the first moving member 3 will also rotate to a certain extent. When the first moving member 3 rotates, it will drive the track base 2 to rotate, and the track base 2 will drive the second moving member 4 to rotate on the main shaft 1. Since the second moving member 4 is rotatably arranged on the main shaft 1, the second moving member 4 rotates synchronously with the track base 2, and the track base 2 rotates synchronously with the first moving member 3. Therefore, the rotation of the first moving member 3 is also around the main shaft 1. Thus, there is only one rotation point of the movement assembly, and this rotation point is the main shaft 1. The entire movement assembly can rotate around the main shaft 1, so that when the backrest tilts, the movement assembly can adaptively tilt and rotate, preventing the tilting movement of the backrest from interfering with the movement of the locking mechanism and enabling the backrest to be locked smoothly after tilting.

[0071] Furthermore, in terms of direction, the axial direction of the main shaft 1 coincides with the locking direction. The second moving member 4 is sleeved on the main shaft 1 and is slidably engaged with the main shaft 1 in the second sliding track 6. The second moving member 4 moves in the locking direction. Since the second moving member 4 is slidably arranged on the main shaft 1, after the first moving member 3 moves, the second moving member 4 moves along the axial direction of the main shaft 1 and can be connected to the first moving member 3 to realize the reclining lock of the backrest and maintain the current position. Therefore, the locking direction is the left-right direction, and the adjustment direction is approximately the front-back direction. In the adjustment state, when the backrest rotates, the adjustment direction tilts with the swing of the moving assembly. When the backrest rotates and drives the first moving member 3 to move, in addition to displacement, the first moving member 3 will also rotate due to the rotation of the backrest. When the first moving member 3 rotates, it will drive the entire moving assembly to rotate on the main shaft 1. The adaptability of this mechanism is strong, so that the reclining lock after the backrest rotates can be successfully realized. The tilt of the adjustment direction is also an embodiment of the adaptability.

[0072] The combination and locking of the first moving member 3 and the second moving member 4 are as follows:

[0073] As Figure 5 、 6 As shown in 12 and 13, the first moving member 3 is a long strip-shaped metal part. The first moving member 3 is provided with a receiving groove 13 in the locking direction, and the receiving groove 13 extends along the length direction of the first moving member 3. An internal tooth part 14 is provided in the receiving groove 13, and an external tooth part 15 is provided on the locking part 41 of the second moving member 4. In the locked state, the locking part 41 of the first moving member 3 enters the receiving groove 13, and the first moving member 3 and the second moving member 4 are locked by the engagement of the internal tooth part 14 and the external tooth part 15. In the adjustment state, the locking part 41 leaves the receiving groove 13 and enters the third groove 205, and the first moving member 3 and the second moving member 4 are disengaged from the lock. The first moving member 3 can move in the first sliding track 5 with the rotation of the backrest. The length direction of the first moving member 3 is the adjustment direction. When the first moving member 3 moves in the adjustment direction, the position of the second moving member 4 corresponding to the receiving groove 13 will also change. When the second moving member 4 is at different positions in the receiving groove 13 and the internal tooth part 14 is engaged with the external tooth part 15, the backrest is locked at different reclining positions, and the backrest maintains the reclining angle at this time.

[0074] The force on the backrest is transmitted to the first moving member 3 through the backrest connecting member 8 and the connecting pin 9. The first moving member 3 further transmits the force to the locking part 41 through the engagement of the internal tooth part 14 and the external tooth part 15. The locking part 41 is directly arranged on the main shaft 1, so the force is transmitted to the main shaft 1 again. The main shaft 1 finally transmits the force to the base 7. In order to ensure strength and sufficient load-bearing capacity, the base 7, the main shaft 1, the locking part 41, and the first moving member 3 are all metal parts with higher strength.

[0075] The density of the internal tooth part 14 is greater than 55 teeth per 100 mm. The fine teeth and dense teeth achieve stepless adjustment of the feeling; internal tooth parts 14 are provided on both the upper groove wall and the lower groove wall of the accommodation groove 13. Correspondingly, external tooth parts 15 are also provided on both the upper surface and the lower surface of the locking part 41; in this embodiment, the internal tooth part 14 is 74 mm long and is distributed with 42 teeth.

[0076] Embodiment 2: The difference between this embodiment and Embodiment 1 is only that both the locking part 41 and the sliding part 42 of the second moving part 4 are metal parts. Specifically:

[0077] The second moving part 4 is a metal part. The second moving part 4 includes a locking part 41 and a sliding part 42. The sliding part 42 is arranged in the second sliding track 6 and fits with the second sliding track 6. The locking part 41 is used to be combined and locked with the first moving part 3 when approaching the first moving part 3; the locking part 41 and the sliding part 42 are integrally formed; the second moving part 4 is a force-bearing part and is made of metal to increase the strength; the locking part 41 and the sliding part 42 can be integrally formed, which is more convenient to manufacture.

[0078] The tray further includes an operating rod 16. The operating rod 16 is inserted into the base 7 in the left-right direction. A transmission part is provided between the operating rod 16 and the second moving part 4. The operating rod 16 is configured to drive the transmission part to move by pulling the operating rod 16. The transmission part drives the second moving part 4 to slide in the second sliding track 6 and makes the backrest tilting locking mechanism switch between the adjustment state and the locking state; the transmission part is a torsion spring 17. The torsion spring 17 is rotatably arranged on the base 7. Two ends of the torsion spring 17 are respectively connected to the operating rod 16 and the second moving part 4; an avoidance groove 18 extending along the locking direction is formed on the track seat 2 outside the second moving part 4. A slot 19 is formed on the second moving part 4. One end of the spring arm of the torsion spring 17 passes through the avoidance groove 18 and is inserted into the slot 19; the avoidance groove 18 is configured to drive the second moving part 4 to move in the second sliding track 6 when the operating rod 16 is pulled, and the avoidance groove 18 avoids the movement of the spring arm.

[0079] By pulling the operating rod 16 left and right, the switching between locking and unlocking in the locking mechanism can be realized. It is not only easy and simple to operate, but also within the reach of the user, which is more convenient; the transmission part is preferably a torsion spring 17, which not only has a low cost, but also the mounting seat and other components of the torsion spring 17 matched in the tray are simpler in structure; the torsion spring 17 as the transmission part also has a buffering effect during locking: when the first moving part 3 and the second moving part 4 are locked, in the case where the internal tooth part 14 and the external tooth part 15 are not completely aligned and engaged, not only can the operating rod still be pulled, but also it will not be more laborious when pulling, and after the backrest tilts slightly, the second moving part 4 can be automatically locked into the first moving part 3, that is, the internal tooth part 14 and the external tooth part 15 can be engaged with a delay without affecting the operation.

[0080] Embodiment 2: Apply the backrest reclining locking mechanism to another type of tray. Specifically:

[0081] As Figures 15 - 17 shown, in this embodiment, the tray has a seat-back linkage function; the linkage member includes a seat connecting member 21, a connecting pin 9, and a rotating and sliding shaft 22. The seat connecting member 21 is rotatably arranged on the base 7. The connecting pin 9 is inserted through the seat connecting member 21 and the first moving member 3. The first moving member 3 is rotatably connected to the seat connecting member 21 through the connecting pin 9. The rotating and sliding shaft 22 is arranged on the seat connecting member 21. A chute 23 is formed on the backrest connecting member 8. The rotating and sliding shaft 22 is inserted into the chute 23. The rotating and sliding shaft 22 and the chute 23 are configured to link the backrest connecting member 8 and the seat connecting member 21. When the backrest connecting member 8 rotates relative to the base 7, it drives the seat connecting member 21 to rotate relative to the base 7. The tray in this solution can achieve the linkage of the seat and the backrest. When the backrest reclines, it drives the seat to rotate relative to the base 7, thereby reducing the rubbing feeling on the back and improving comfort.

[0082] The backrest reclining locking mechanism is vertically arranged in the tray. The first moving member 3 is vertical and inclined in the front-rear direction. When the backrest connecting member 8 rotates backward, the first moving member 3 drives the track seat 2 to swing and slide downward in the track seat 2. Specifically, the base 7 includes an extended seat 24 protruding downward. The main shaft 1 is arranged on the extended seat 24. The track seat 2 is arranged in the extended seat 24. The extended seat 24 includes at least two plate members, which are arranged at intervals in the left-right direction to install the main shaft 1 and accommodate the track seat 2. The extended seat 24 can be integrally formed with the base 7 or fixedly connected to the base 7 by welding. By means of the extended seat 24, the volume of the base 7 in the up-down direction is increased, so that the vertically arranged locking mechanism can be smoothly installed on the base 7. In this type of tray with seat-back linkage, the volume of the base 7, that is, the internal space of the tray, is small, and the thickness of the base 7 is also small, making it difficult to accommodate the above-mentioned locking mechanism. Therefore, for this type of tray that is not easy to accommodate, the locking mechanism originally arranged in the front-rear direction can be changed to the up-down direction, and the reclining locking of the backrest can still be achieved.

[0083] In this embodiment, although the orientation of the backrest reclining locking mechanism has changed, as long as the bending of the torsion spring 17 is adaptively changed, the operating rod 16 can still control the second moving member 4 through the torsion spring 17.

Claims

1. A swing assembly, characterized in that: It includes a main shaft and a moving component, which is rotatably arranged on the main shaft and swings on the main shaft; the moving component includes a track seat and a first moving part and a second moving part arranged on the track seat, the track seat includes a first sliding track and a second sliding track that are perpendicular to each other, and the first moving part and the second moving part slide in the first sliding track and the second sliding track respectively; the first moving part and the first sliding track are attached to the first moving part so that the first moving part can rotate synchronously with the track seat relative to the main shaft; the second moving part and the second sliding track are attached to the second moving part so that the second moving part can rotate synchronously with the track seat relative to the main shaft; the first moving part or the second moving part is sleeved on the main shaft and is rotatably connected to the main shaft.

2. The swing assembly according to claim 1, characterized in that: The track seat is slotted through to form a first sliding track. The first moving part has a first limiting surface and a second limiting surface. The first limiting surface fits with the upper groove wall of the first sliding track, and the second limiting surface fits with the lower groove wall of the first sliding track.

3. The swing assembly according to claim 2, characterized in that: The main shaft is arranged along the left-right direction, the second sliding track is arranged along the left-right direction, the second moving part is sleeved on the main shaft, the track seat is sleeved on the second moving part and the second moving part is slidably arranged in the second sliding track.

4. A locking mechanism, characterized in that: It includes a swinging assembly as described in any one of claims 1 to 3; it has an adjustment direction and a locking direction, the adjustment direction coincides with the first sliding track, and the locking direction coincides with the second sliding track, the first moving part moves in the adjustment direction as the chair back rotates, the second moving part moves in the locking direction, and locks the first moving part when the second moving part approaches the first moving part or unlocks the first moving part when the second moving part leaves the first moving part; it also has an adjustment state and a locking state, in the adjustment state, the first moving part is disengaged from the second moving part, the chair back can rotate and drive the first moving part to move in the adjustment direction and rotate relative to the main axis; in the locking state, the first moving part and the second moving part are combined and locked to lock the current reclining angle of the chair back.

5. The locking mechanism according to claim 4, characterized in that: In the adjustment state, when the chair back rotates, the adjustment direction tilts as the moving component swings.

6. The locking mechanism according to claim 4, characterized in that: The axial direction of the main shaft coincides with the locking direction, and the second moving part is sleeved on the main shaft and slidably matched with the main shaft in the second sliding track.

7. The locking mechanism according to claim 6, characterized in that: The main shaft is a metal part.

8. The locking mechanism according to claim 7, characterized in that: The second moving part is a metal part, and the second moving part includes a locking part and a sliding part. The sliding part is arranged in the second sliding track and fits with the second sliding track, and the locking part is used to lock with the first moving part when it is close to the first moving part; the locking part and the sliding part are integrally formed.

9. The locking mechanism according to claim 7, characterized in that: The second moving part includes a locking part and a sliding part. The sliding part is arranged in the second sliding track and fits with the second sliding track. The locking part is used to lock with the first moving part when it is close to the first moving part. The locking part and the sliding part are spliced ​​together, and the locking part is a metal part, and the sliding part is a plastic part.

10. The locking mechanism according to claim 4, characterized in that: The first moving part has a receiving groove in the locking direction, and the receiving groove extends along the length direction of the first moving part; an inner tooth portion is provided in the receiving groove, and an outer tooth portion is provided on the second moving part. In the locked state, the first moving part enters the receiving groove and the first moving part and the second moving part are locked by meshing the inner tooth portion with the outer tooth portion.

11. The locking mechanism according to claim 10, characterized in that: The density of the inner teeth is greater than 55 teeth / 100 mm.

12. The locking mechanism according to claim 4, characterized in that: The track seat is composed of two left-right symmetrical track parts.

13. A pallet, characterized in that: It includes a base, a seat back connector and a locking mechanism as described in any one of claims 4 to 12, wherein the locking mechanism is rotatably arranged on the base, the main shaft is arranged on the base along the left-right direction, a linkage member is provided between the locking mechanism and the seat back connector, and the linkage member is configured so that when the seat back connector rotates relative to the base, the moving component rotates on the main shaft; when the locking mechanism is in an adjustment state, the seat back connector can rotate relative to the base; when the locking mechanism is in a locked state, the locking mechanism locks the rotation between the seat back connector and the base, and makes the seat back connector stay in the rotated position.

14. The pallet according to claim 13, characterized in that: The base has a mounting groove which is open upwards, and a locking mechanism is arranged in the mounting groove.

15. The pallet according to claim 13, characterized in that: It also includes an operating rod, which is inserted into the base along the left and right directions. A transmission member is provided between the operating rod and the second moving member. The operating rod is configured to pull the operating rod to drive the transmission member to move. The transmission member drives the second moving member to slide in the second sliding track and switches the locking mechanism between the adjustment state and the locking state.

16. The pallet according to claim 15, characterized in that: The transmission member is a torsion spring, which is rotatably arranged on the base, and the two ends of the torsion spring are respectively connected to the operating rod and the second moving member.

17. The pallet according to claim 16, characterized in that: An avoidance groove extending along the locking direction is provided on the track seat outside the second moving part, and a slot is provided on the second moving part, and a torsion spring arm at one end of the torsion spring is inserted into the slot through the avoidance groove; the avoidance groove is configured so that when the operating rod is pulled, the torsion spring drives the second moving part to move in the second sliding track, and the avoidance groove avoids the movement of the torsion spring arm.

18. The pallet according to claim 13, characterized in that: The linkage member is a connecting pin, which is inserted into the first moving member and the seat back connecting member, and the first moving member and the seat back connecting member are rotatably connected through the connecting pin.

19. The pallet according to claim 13, characterized in that: The linkage part includes a seat connection part, a connecting pin and a rotating sliding shaft. The seat connection part is rotatably arranged on the base. The connecting pin is penetrated through the seat connection part and the first moving part. The first moving part and the seat connection part are rotatably connected through the connecting pin. The rotating sliding shaft is arranged on the seat connection part. A sliding groove is provided on the chair back connection part. The rotating sliding shaft is inserted into the sliding groove. The rotating sliding shaft and the sliding groove are configured to link the chair back connection part with the seat connection part. When the chair back connection part rotates relative to the base, the seat connection part is driven to rotate relative to the base.

20. The pallet according to claim 13, characterized in that: The locking mechanism is vertically arranged in the tray, and the first moving member is vertical and inclined in the front-rear direction; when the chair back connecting member rotates backward, the first moving member drives the track seat to swing and slide downward in the track seat.

21. The pallet according to claim 20, characterized in that: The base comprises a downwardly convex extension seat, the main shaft is arranged on the extension seat, and the track seat is arranged in the extension seat.

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