Chair back sliding mechanism

Abstract

The utility model provides a chair back sliding mechanism which comprises a supporting piece and a moving assembly, the moving assembly comprises a sliding piece and at least two track pieces, the supporting piece is provided with a containing groove, and the two track pieces are arranged in the containing groove in parallel. The two sliding blocks of the sliding piece are respectively sleeved on the different rail pieces and can slide along the rail pieces, so that the sliding piece is suspended in the containing groove. The front end of the sliding piece is exposed and used for being connected with the chair back. Compared with a traditional chair back sliding mechanism, according to the scheme, the sliding piece does not make contact with the groove wall of the containing groove and only generates sliding friction with the rail piece, the friction force is greatly reduced, and the sliding smoothness is effectively improved. Therefore, the abrasion of parts is reduced, the service life of the seat is prolonged, the feeling of a user when the seat back is used is optimized, the operation is easier and smoother, the competitiveness of the product in the market is enhanced, and an innovative solution is provided for improving the comfort of the seat.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of children's chair, especially a chair back sliding mechanism. BACKGROUND

[0002] In the field of children's chair, the performance of the chair back sliding mechanism has a key influence on the comfort and use experience of the seat. The traditional chair back sliding mechanism has many drawbacks and needs to be improved.

[0003] Many traditional chair back sliding mechanisms adopt the design of direct contact between the sliding member and the slot wall of the accommodating slot. In the long-term use process, this direct contact mode is prone to generate a large amount of friction. The friction not only causes the wear of the sliding member and the accommodating slot, shortens the service life of the seat and increases the maintenance cost, but also causes the phenomenon of jamming and incoordination when the chair back slides, greatly reducing the use experience of the user.

[0004] At the same time, the larger friction force requires the children to exert more force to push the chair back to slide. For some children with smaller force, it is more difficult to operate, which limits the applicable population of the product to some extent.

[0005] In addition, with the continuous improvement of consumers' requirements for the comfort and quality of the seat, the market puts forward higher standards for the smoothness, stability and durability of the chair back sliding mechanism. The traditional sliding mechanism has been difficult to meet these increasingly stringent demands and cannot stand out in the fierce market competition. SUMMARY

[0006] In order to solve the above technical problems, the utility model provides a chair back sliding mechanism, which comprises a support member and a movement assembly. The movement assembly comprises a sliding member and at least two track members. The support member is provided with an accommodating slot, and the two track members are arranged in parallel in the accommodating slot. The two sliding blocks of the sliding member are respectively sleeved on different track members and can slide along the track members, so that the sliding member is suspended in the accommodating slot. The accommodating slot is open at the front, and the front end of the sliding member is exposed for connecting the chair back. Compared with the traditional chair back sliding mechanism, the sliding member in the present scheme does not contact the slot wall, but only produces sliding friction with the track members, greatly reduces the friction force and effectively improves the sliding smoothness. This not only reduces the wear of the parts, prolongs the service life of the seat, but also optimizes the user's experience when using the chair back, making the operation more smooth and easy, enhancing the competitiveness of the product in the market and providing an innovative solution for improving the comfort of the seat.

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

[0008] A chair back sliding mechanism comprises a support and a moving assembly, the moving assembly comprises a sliding piece and at least two track pieces, the support has a containing groove, the two track pieces are arranged in parallel in the containing groove, the sliding piece comprises two sliding blocks, the two sliding blocks are respectively sleeved and slidingly arranged on the two track pieces, and the track pieces are configured to make the sliding piece be suspended in the containing groove; the containing groove is open at the front, the front end of the sliding piece is exposed from the containing groove, and the sliding piece is configured to be connected with the chair back at the front end.

[0009] In the scheme, the sliding piece is suspended in the containing groove through the track pieces, the sliding piece is no longer in contact with the groove wall of the containing groove, which means that no extra friction is generated, the sliding piece only slides with the track pieces in the sliding process, the friction is greatly reduced, the smoothness of sliding is improved, the use experience of the chair back sliding is greatly improved, and the market competitiveness of the product is increased.

[0010] As preferred, the front end wall of the containing groove is provided with first grooves in the same number as the track pieces, the rear of the containing groove is provided with an end cover, the end cover is fixedly connected with the support, the front side wall of the end cover is also provided with second grooves in the same number, and the two ends of the track pieces are arranged in the first grooves and the second grooves respectively. The installation mode of the track pieces is very simple, and even does not need to be fixed by using screws, so that the production and assembly efficiency is improved.

[0011] As preferred, the scheme further comprises an elastic piece, the elastic piece is arranged between the end cover and the sliding piece and always gives the sliding piece a forward elastic force. The elastic piece gives the chair back a forward elastic force, so that the chair back has an adaptive function, users can be supported in different positions, and the seat depth can be adapted to children of different ages.

[0012] As preferred, the scheme further comprises a locking mechanism, the locking mechanism comprises a control piece, a locking piece and a locking strip, the support is provided with a window which is in communication with the containing groove, the control piece is movably connected with the support at the window, the locking piece is arranged in the window and is linked with the control piece, and the locking strip is arranged on the sliding piece; the locking strip has a plurality of first clamping teeth arranged in the front-rear direction, the locking piece is provided with corresponding second clamping teeth, and the control piece is configured to control the movement of the locking piece and make the second clamping teeth and the first clamping teeth be clamped or separated. The locking of the chair back after sliding adjustment is realized, and the needs of users in different situations are met.

[0013] As preferred, the support comprises a back support and a sleeve, the sleeve is arranged on the back support in the front-rear direction, and the containing groove is arranged on the sleeve.

[0014] As preferred, the sliding member is provided with a limiting strip, the accommodating groove is provided with an auxiliary limiting groove at the end surface close to the limiting strip, and the limiting strip protrudes towards the auxiliary limiting groove and is suspended in the auxiliary limiting groove. In normal use, the limiting strip is completely separated from the auxiliary limiting groove, and no extra friction is generated. When the chair back is weakened or subjected to a large load, if the track member cannot bear or the sliding member shakes, the auxiliary limiting groove limits the limiting strip, and the sliding member can still operate normally.

[0015] As preferred, the track member is a columnar body.

[0016] As preferred, the track member is metal. The friction coefficient is reduced, and the motion is smooth.

[0017] As preferred, a protruding strip is protruded on the wall of the accommodating groove beside the sliding block, and the sliding block has a gap with the protruding strip, and the gap between the protruding strip and the sliding block is smaller than the gap between the wall of the accommodating groove and the sliding block. The protruding strip has the same effect as the limiting strip and the auxiliary limiting groove, and it protects the mechanism when the track member fails or the sliding member shakes.

[0018] As preferred, in the sliding direction, the length of the sliding block is smaller than the length of the sliding member. The contact area is reduced, the friction is reduced, and the motion is smooth.

[0019] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0020] From the perspective of friction control, in the traditional chair back sliding mechanism, the sliding member directly contacts with the wall of the accommodating groove, and a large amount of friction is generated in the sliding process. This extra friction not only consumes energy, but also causes the parts to wear out. In the present scheme, the sliding member is completely separated from the wall of the accommodating groove, which fundamentally eliminates the possibility of generating such extra friction. During the sliding process, the sliding member only has sliding friction with the track member. Since the track member is specially designed for sliding, its surface is specially treated, which can control the friction to a very small range. The significant reduction of the friction makes the sliding member move more smoothly, like sliding on a smooth track.

[0021] The reduction of friction directly brings about a significant improvement in sliding smoothness. In actual use, when the user needs to adjust the position of the chair back, only a small force needs to be applied, and the sliding member can quickly and smoothly slide along the track member. There is no phenomenon such as jamming or hesitation. This smooth sliding experience makes the user operate the chair back more easily and freely, and no longer needs to exert force to push or pull, which greatly improves the convenience of operation.

[0022] For users, the improvement of the use experience when the chair back slides is the most intuitive and important. In traditional mechanisms, due to large friction and unsmooth sliding, users often feel difficult and annoyed when adjusting the chair back, and may even reduce the frequency of using the chair back due to the difficulty of operation. The chair back sliding mechanism of the present application brings a new use experience to users with its excellent sliding smoothness. Whether reading, resting or working, users can easily adjust the angle and position of the chair back according to their needs and find the most comfortable sitting posture. This comfortable use experience can effectively relieve the fatigue of users and improve the satisfaction and loyalty of users to the product.

[0023] In summary, the chair back sliding mechanism of the present application realizes the reduction of friction, the improvement of sliding smoothness and the optimization of user use experience through unique design. These effects are interrelated and mutually promoted, and together they have won the product a significant competitive advantage in the market. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective structural schematic view of a child chair in an embodiment of the present application;

[0025] Figure 2 It is a perspective structural schematic view of a back device in an embodiment of the present application;

[0026] Figure 3 It is a perspective structural schematic view of a sliding member in an embodiment of the present application, with the front end exposed from the sleeve;

[0027] Figure 4 It is a sectional view of the back device in an embodiment of the present application, with the chair back removed; Figure 1 ;

[0028] Figure 5 It is a perspective structural schematic view of a support member in an embodiment of the present application;

[0029] Figure 6 It is a rear view of the support member in an embodiment of the present application;

[0030] Figure 7 It is a perspective structural schematic view of a track member inserted into a first sink groove in an embodiment of the present application;

[0031] Figure 8 It is a perspective structural schematic view of a sliding member provided on a track member in an embodiment of the present application;

[0032] Figure 9 It is a perspective structural schematic view of a sliding member in an embodiment of the present application;

[0033] Figure 10 It is a perspective structural schematic view of a track member inserted into a second sink groove in an embodiment of the present application;

[0034] Figure 11 The utility model discloses a three-dimensional structure schematic view of operating member setting in the embodiment of end cover of the utility model;

[0035] Figure 12 The utility model discloses a three-dimensional structure schematic view of end cover in the embodiment of the utility model;

[0036] Figure 13 The utility model discloses a plane section view of adjusting member in the embodiment of the utility model;

[0037] Figure 14 The utility model discloses a section view of back device of removing chair back in the embodiment of the utility model Figure 2 .

[0038] The reference numerals are: support piece 100, chair seat 200, base 300, chair back 400, back support 1, sleeve 2, installation shell 21, first sunken groove 211, auxiliary limiting groove 212, convex strip 213, opening 214, window 215, end cover 22, second sunken groove 221, limiting column 222, reinforcing rib 223, containing groove 3, sliding piece 4, sliding block 41, limiting strip 42, convex base 43, track piece 5, operating member 7, knob 71, adjusting member 8, board part 81, limiting hole 811, notch 812, cylinder part 82, control member 9, locking member 10, second clamping tooth 101, locking strip 11, first clamping tooth 111. DETAILED DESCRIPTION

[0039] In order to enable the above object, features and advantages of the utility model to be more clearly understood, the following will further describe the utility model in detail with the accompanying drawings and specific embodiments. It should be explained that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0041] In the description of the utility model, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] The specific embodiments of the utility model are as follows:

[0043] As Figure 3 , 4The utility model provides a chair back sliding mechanism as shown in 14, the utility model provides a chair back sliding mechanism, including support piece 100 and movement subassembly, movement subassembly includes sliding piece 4 and at least two track pieces 5, support piece 100 has a containing groove 3, two track pieces 5 are arranged in containing groove 3 in parallel, sliding piece 4 includes two sliding blocks 41, two sliding blocks 41 are respectively set and slide in two track pieces 5, track piece 5 is configured to make sliding piece 4 suspend and set in containing groove 3, containing groove 3 front opening, sliding piece 4 front end exposes in containing groove 3, sliding piece 4 is configured to its front end and chair back 400 are connected.

[0044] In the scheme, sliding piece 4 is suspended in containing groove 3 through track piece 5, sliding piece 4 is no longer in contact with the groove wall of containing groove 3, which means that no additional friction is generated, sliding piece 4 only slides with track piece 5 in the sliding process, greatly reducing the friction, thereby improving the smoothness of sliding, the use feeling of chair back 400 when sliding is also greatly improved, and the market competitiveness of the product is increased.

[0045] Specifically, as shown in Figures 1-4 The chair back sliding mechanism is applied to a child chair, which comprises a seat 200, a base 300 and a back device, the seat 200 is arranged on the base 300, the back device is arranged on the seat 200, the back device comprises a support piece 100 and a chair back 400, the support piece 100 comprises a back support 1 and a sleeve 2, the back support 1 is L-shaped, the lower end of the back support 1 is connected to the seat 200, the sleeve 2 is arranged at the upper part of the back support 1 and is arranged in the front-rear direction, the sleeve 2 comprises a mounting shell 21 and an end cover 22, the mounting shell 21 is provided with a containing groove 3, and the end cover 22 is arranged at the rear of the mounting groove and is fixedly connected to the mounting shell 21 by screws; two track pieces 5 are arranged in the sleeve 2 and are arranged in the front-rear direction and across the containing groove 3, the two track pieces 5 are symmetrically arranged left and right, the sliding piece 4 is slidably arranged on the two track pieces 5, sliding blocks 41 are protrudingly arranged at the left and right ends of the sliding piece 4, and the two sliding blocks 41 are respectively sleeved on the same track piece 5 and are in sliding cooperation; the mounting shell 21 in front of the containing groove 3 is also provided with an opening 214, the front end of the sliding piece 4 is exposed from the opening 214 and connected to the chair back 400. This realizes smooth sliding of the chair back 400 in the seat depth direction.

[0046] More specifically, as shown in Figures 5-11As shown, the front end wall of the accommodating groove 3 in the mounting shell 21 is provided with the same number of first grooves 211 as the number of the track members 5, and the front side wall of the end cover 22 is also provided with the same number of second grooves 221; the two ends of the track member 5 are arranged in the first groove 211 and the second groove 221 respectively, so as to realize the detachable connection of the track member 5 on the support member 100, at this time, the track member 5 is erected in the accommodating groove 3, and the sliding member 4 is also erected by the track member 5 and will not rub against the inner wall of the mounting shell 21; in this embodiment, the track member 5 is a columnar body, and the track member 5 is metal, so as to further reduce the friction; in the sliding direction, that is, the front and back direction, the length of the sliding block 41 is less than the length of the sliding member 4, which can reduce the contact area, reduce friction, and improve the smoothness of movement.

[0047] Further, as shown in Figure 4 、 6 , 7, 9, the sliding member 4 is provided with a limiting strip 42, the accommodating groove 3 is provided with an auxiliary limiting groove 212 on the end face close to the limiting strip 42, and the limiting strip 42 protrudes towards the auxiliary limiting groove 212 and is suspended in the auxiliary limiting groove 212. In normal use, the limiting strip 42 is completely separated from the auxiliary limiting groove 212 and does not increase unnecessary friction, and when the chair back 400 has reduced service life or is subjected to a large load, if the track member 5 cannot bear or the sliding member 4 shakes, the auxiliary limiting groove 212 will limit the limiting strip 42, and the sliding member 4 can still operate normally.

[0048] The groove wall of the accommodating groove 3 beside the sliding block 41 is provided with a protruding strip 213, and two protruding strips 213 are arranged above, below and outside the sliding block 41, and two left and right symmetrical protruding strips 213 are arranged below the whole sliding member 4. The sliding block 41 and the sliding member 4 have a gap between them and the protruding strip 213, and the gap between the protruding strip 213 and the sliding block 41 and the sliding member 4 is smaller than the gap between the groove wall of the accommodating groove 3 and the sliding block 41 and the sliding member 4; the protruding strip 213 has the same effect as the limiting strip 42 and the auxiliary limiting groove 212, which also protects the mechanism in the case of failure of the track member 5 or shaking of the sliding member 4.

[0049] In addition, the sliding of the chair back 400 has self-adaptive ability, that is, the back chasing effect:

[0050] The sliding member 4 is also a shell open to the rear, and a resilient member (not shown) is arranged between the end cover 22 and the sliding member. The resilient member is a telescopic spring, which always gives the sliding member 4 a forward elastic force, so that the chair back 400 has the back chasing effect.

[0051] Specifically, as shown in Figures 4-13As shown, the operating member 7 is rotatably arranged on the end cover 22, most part of the operating member 7 is located in the accommodating groove 3, and the rear end of the operating member 7 is exposed from the end cover 22; the part of the operating member 7 located in the accommodating groove 3 is provided with external threads, and the adjusting member 8 is sleeved on the operating member 7, the adjusting member 8 is located in the accommodating groove 3, the adjusting member 8 is provided with internal threads, the adjusting member 8 is threadedly connected with the operating member 7, the adjusting member 8 is also circumferentially limited with the sleeve 2, and when the operating member 7 rotates, the adjusting member 8 moves forward and backward in the accommodating groove 3; most part of the elastic member is located in the sliding member 4, and the front and rear ends of the elastic member are respectively abutted on the sliding member 4 and the adjusting member 8. The operating member 7 comprises a knob 71, and the knob 71 is exposed rearward from the end cover 22, so as to be convenient for screwing.

[0052] Further, the end cover 22 is provided with at least two limiting columns 222, the adjusting member 8 comprises a vertically arranged plate portion 81, and the elastic member is abutted on the plate portion 81; the plate portion 81 is provided with limiting holes 811 in the same number as the limiting columns 222, and the limiting columns 222 are inserted in the limiting holes 811; in the embodiment, the limiting columns 222 are two, and the two limiting columns 222 are symmetrically arranged on the end cover 22 and extend toward the accommodating groove 3, and the limiting holes 811 are also located at the left and right ends of the end cover 22; when the adjusting member 8 slides forward and backward, the limiting columns 222 also serve as the guide of the adjusting member 8. The limiting columns 222 and the end cover 22 are provided with reinforcing ribs 223, the plate portion 81 is provided with notches 812 beside the limiting holes 811, the notches 812 are communicated with the limiting holes 811, and the notches 812 are configured to avoid the reinforcing ribs 223. The length of the limiting column 222 is greater than the thickness of the plate portion 81, and the length of the limiting column 222 ranges from 38mm to 50mm. In the embodiment, the length of the limiting column 222 is 41mm. The adjusting member 8 further comprises a cylinder portion 82, the cylinder portion 82 protrudes forward from the plate portion 81, and the rear end of the elastic member is sleeved on the cylinder portion 82. The sliding member 4 is provided with a convex seat 43, and the front end of the elastic member is sleeved on the convex seat 43.

[0053] The sliding of the chair back 400 also has a locking function:

[0054] Specifically, as Figure 4 、 5As shown in Figs. 8, a locking mechanism is further arranged between the sliding member 4 and the sleeve 2, which comprises a control member 9, a locking member 10 and a locking strip 11. A window 215 is formed in the upper portion of the mounting shell 21 and communicates with the accommodating groove 3. The control member 9 is movably connected to the mounting shell 21 at the window 215. The locking member 10 is arranged in the window 215 and is linked with the control member 9. The locking strip 11 is arranged on the sliding member 4. In this embodiment, the control member 9 is rotatably connected to the window 215, and the locking member 10 is only movably arranged in the window 215. Further, the locking strip 11 has a plurality of first clamping teeth 111 arranged along the front and back directions. The locking member 10 is correspondingly provided with second clamping teeth 101. The control member 9 is configured to control the movement of the locking member 10 and make the second clamping teeth 101 engage or disengage with the first clamping teeth 111. When the control member 9 is rotated to press the locking member 10 downward, the sliding member 4 is locked. When the control member 9 is rotated to release the locking member 10, the second clamping teeth 101 can lift the first clamping teeth 111 and the locking member 10 when the sliding member 4 slides. The second clamping teeth 101 can switch between different second clamping teeth 101. The first clamping teeth 111 and the second clamping teeth 101 are both provided with a plurality of teeth, and the interval between the teeth is very small. The locking mechanism can not only realize the stepless adjustment feeling, but also keep stable when locked.

Claims

1. A chair back slide mechanism characterized by: The support and the moving assembly are provided, the moving assembly comprises a sliding piece and at least two track pieces, the support has a containing groove, the two track pieces are arranged in parallel in the containing groove, the sliding piece comprises two sliding blocks, the two sliding blocks are sleeved and slidably arranged on the two track pieces respectively, and the track pieces are configured to suspend the sliding piece in the containing groove.

2. The chair back slide mechanism of claim 1, wherein: The front end of the sliding piece is exposed from the containing groove, and the sliding piece is configured to be connected with the chair back at the front end.

3. The chair back slide mechanism of claim 2, wherein: The front end wall of the containing groove is provided with first grooves in the same number as the track pieces, the rear of the containing groove is provided with an end cover, the end cover is fixedly connected with the support, the front side wall of the end cover is also provided with second grooves in the same number, and the two ends of the track pieces are arranged in the first grooves and the second grooves respectively.

4. The seat back slide mechanism of claim 1, wherein: The elastic piece is arranged between the end cover and the sliding piece and always gives the sliding piece a forward elastic force.

5. The seat back slide mechanism of claim 1, wherein: The locking mechanism comprises a control piece, a locking piece and a locking strip, a window is formed in the support and communicates with the containing groove, the control piece is movably connected with the support at the window, the locking piece is arranged in the window and is linked with the control piece, and the locking strip is arranged on the sliding piece.

6. The seat back slide mechanism of claim 1, wherein: The support comprises a back support and a sleeve, the sleeve is arranged on the back support in the front-rear direction, and the containing groove is formed in the sleeve.

7. The seat back slide mechanism of claim 1, wherein: The limiting strip is protruded on the sliding piece, the auxiliary limiting groove is formed in the end face of the containing groove close to the limiting strip, the limiting strip is protruded towards the auxiliary limiting groove and is suspended in the auxiliary limiting groove.

8. The seat back slide mechanism of claim 1, wherein: The track piece is a columnar body.

9. The seat back slide mechanism of claim 1, wherein: The track piece is metal.

10. The seat back slide mechanism of claim 1, wherein: The convex strip is protruded on the containing groove wall beside the sliding block, the gap is formed between the convex strip and the sliding block, and the gap between the convex strip and the sliding block is smaller than the gap between the containing groove wall and the sliding block. In the sliding direction, the length of the sliding block is smaller than the length of the sliding piece.

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