Adjusting mechanism, headrest structure and seat

Abstract

The utility model discloses an adjusting mechanism, a headrest structure and a seat. The utility model relates to an adjusting or locking device for a B60N2 / 80 headrest, which comprises a mounting base, an adjusting frame arranged on the mounting base in a sliding manner, a second ratchet group arranged in the adjusting frame, a connecting piece accommodated in the adjusting frame and fixedly connected with the mounting base, and a second ratchet group arranged in the adjusting frame, the movable part is movably arranged on one side of the connecting part and moves in the radial direction of the connecting part; and the unlocking / locking rod penetrates through the movable part and pokes the movable part to be in contact with or separated from the second ratchet group in the moving process of the unlocking / locking rod. Sliding and locking of the headrest frame are achieved through the adjusting mechanism, the ratchet set, the unlocking rod and the elastic piece, the unlocking rod pokes the movable piece to control meshing of the ratchets, and reciprocating motion of the headrest is achieved through the adjusting assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the adjusting or locking device of B60N2 / 80 headrest, concretely is a kind of adjusting mechanism, headrest structure and seat. BACKGROUND

[0002] Mechanical adjusting headrest as an important component of office chair, its core function is to provide support for the head and neck of user, while allowing height or angle adjustment according to individual needs. At present, the mainstream mechanical adjusting headrest on the market mostly adopts the structure of spring and ratchet cooperation, and realizes multi-position adjustment through the locking mechanism of ratchet. This structure has the advantages of low cost, simple manufacturing and strong durability, but also has some technical limitations. How to retain the advantages of spring and ratchet structure while solving the integrated spring reset unlocking has become the key direction of technical improvement of mechanical adjusting headrest.

[0003] For example: the utility model with the authorization announcement number: 207028931U "child seat with headrest adjustment", discloses: a child seat with headrest adjustment, including chair body, headrest, adjusting mechanism and headrest fixing seat, the adjusting mechanism includes positioning support, adjusting button, button reset spring, positioning pin and connecting rod, the positioning support is provided with inclinedly arranged guide groove in it;The one end of positioning pin is arranged in guide groove, the other end of positioning pin is fixedly connected with connecting rod, the positioning pin is matched with positioning hole, and the guide groove is pushed to make the positioning pin exit from the positioning hole by the radial movement of connecting rod along the axial movement of pressing adjusting button. The utility model with headrest adjustment of child seat can release the locking of headrest by directly operating button, so that the headrest can be freely adjusted along the headrest slide, and the button positioning pin will be reinserted into the corresponding positioning hole after adjustment, to realize the locking of headrest;Greatly simplify the steps of headrest adjustment, and facilitate the operation of user.

[0004] The technical scheme aims to integrate the ratchet and the unlocking function of triggering spring reset into an independent module, to realize linkage triggering unlocking when adjusting the height of headrest, to realize operation convenience, and to provide more comfortable and reliable use experience for user. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the utility model provides an adjusting mechanism, which solves the problem of integrating the ratchet and the unlocking function of triggering spring reset into an independent module, linkage triggering unlocking when adjusting the height of headrest, realizing operation convenience, and providing more comfortable and reliable use experience for user.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: an adjusting mechanism, including mounting base, the adjusting frame is slidably arranged on the mounting base, the inside of the adjusting frame is provided with second ratchet set, further comprising:

[0007] The connecting piece is accommodated in the adjusting frame and fixedly connected with the mounting base;

[0008] The movable piece is movably arranged on one side of the connecting piece and moves along the radial direction of the connecting piece;

[0009] The unlocking rod penetrates through the movable piece, and the unlocking rod drives the movable piece to contact or separate from the second ratchet set during movement.

[0010] Preferably, the adjusting mechanism further comprises a resilient piece, one end of the resilient piece is connected with the first end of the connecting piece, and the other end of the resilient piece is connected with the first end of the movable piece, and the resilient piece is compressed or recovered during movement of the movable piece along the radial direction of the connecting piece, so that the movable piece maintains a movement trend towards the adjusting frame.

[0011] Preferably, the movable piece is provided with a reversing groove, and the unlocking rod slides along the inner edge of the reversing groove to drive the movable piece to move along the radial direction of the connecting piece.

[0012] Preferably, the unlocking strip is movably arranged on the connecting piece, and the unlocking strip is provided with an embedding hole for accommodating the unlocking rod to limit axial movement of the unlocking rod along the movable piece.

[0013] Preferably, the movable piece is provided with a first ratchet set, and the first ratchet set engages or separates from the second ratchet set during movement of the movable piece, so that the adjusting frame moves in one direction.

[0014] To solve the above problems, the present application further provides a headrest structure, comprising a headrest frame and a seat back frame, and further comprising the adjusting mechanism.

[0015] Preferably, the headrest frame is provided with a sliding seat, and the sliding seat reciprocates along a first sliding groove of the adjusting frame through an adjusting assembly.

[0016] Preferably, the adjusting assembly comprises:

[0017] The limiting piece is embedded in the first sliding groove and is provided with a pair of sliding channels, so that the sliding seat extends out of or retracts into the first sliding groove along the sliding channels;

[0018] The clamping jaw is rotatably connected with the limiting piece, and the clamping jaw separates from or inserts the sliding seat.

[0019] To solve the above problems, the present application further provides a seat, comprising the headrest structure. Advantages

[0020] The adjusting mechanism has the following advantages:

[0021] First, the adjusting frame slides on the mounting base, one-way locking is realized through the second ratchet set, the connecting piece is fixed on the mounting base, the movable piece moves radially along the connecting piece, the unlocking lever controls the contact or disengagement of the movable piece and the second ratchet set, the sliding and locking functions of the adjusting frame are realized, the structure is simple and the operation is convenient.

[0022] Second, the elastic piece connects the connecting piece and the movable piece, the movable piece keeps a movement trend towards the adjusting frame through elastic deformation, the elastic piece is compressed or recovered when the movable piece moves, the reliability of the locking is enhanced, and accidental unlocking is prevented.

[0023] Third, the unlocking lever slides along the reversing groove on the movable piece, the movable piece moves radially, the reversing groove guides the movement direction of the unlocking lever, indirectly controls the movement of the movable piece, realizes the linkage of the unlocking lever and the movable piece, and the operation is more accurate.

[0024] Fourth, the unlocking strip is provided with an embedding hole, the movement of the unlocking lever in the axial direction of the movable piece is limited, the movement direction of the unlocking lever is fixed, it is ensured that the unlocking lever can only slide along the reversing groove, the stability of the movement of the unlocking lever is improved, and misoperation is avoided.

[0025] Fifth, the first ratchet set on the movable piece is engaged or disengaged with the second ratchet set in the adjusting frame, one-way movement is realized, the engagement state of the first ratchet set and the second ratchet set is controlled by the movement of the movable piece, it is ensured that the adjusting frame can only slide in one direction, and reverse movement is prevented.

[0026] Sixth, the headrest structure comprises a headrest frame and a backrest frame, and integrates the above adjusting mechanism, the adjusting mechanism serves as a core component of the headrest structure, controls the sliding and locking of the headrest frame, realizes flexible adjustment of the height of the headrest, and improves user experience.

[0027] Seventh, the sliding seat reciprocates along the first sliding groove of the adjusting frame through the adjusting assembly, the adjusting assembly controls the movement track of the sliding seat, the headrest frame is extended or retracted, and the movement of the headrest frame is more stable and controllable.

[0028] Eighth, the limiting piece is embedded in the first sliding groove, the clamping jaw is rotationally connected with the limiting piece, the disengagement or insertion of the sliding seat is controlled, and the limiting piece and the clamping jaw jointly act to limit the movement range of the sliding seat, and the stability and safety of the headrest frame are enhanced.

[0029] Ninth, the seat integrates the above headrest structure, the adjusting function of the headrest is realized, the headrest structure serves as a part of the seat, the comfort and functionality of the seat are improved, and adjustable headrest support is provided for users, and different needs are met. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure explosion drawing of the adjusting mechanism.

[0031] Figure 2 The assembly explosion schematic view of the movable element, the connecting element and the first spring;

[0032] Figure 3 The assembly schematic view of the movable element, the connecting element and the first spring;

[0033] Figure 4 The structure schematic view of the pin sliding to the A locking position of the movable element;

[0034] Figure 5 The structure schematic view of the pin sliding to the B unlocking position of the movable element;

[0035] Figure 6 The structure schematic view of the pin sliding to the C unlocking / locking critical position of the movable element;

[0036] Figure 7 The structure schematic view of the unlocking / locking strip driving the unlocking / locking rod to drive the pin in the locking position;

[0037] Figure 8 The structure schematic view of the unlocking / locking strip driving the unlocking / locking rod to drive the pin in the unlocking position;

[0038] Figure 9 The schematic view of the headrest structure;

[0039] Figure 10 The first assembly explosion view of the headrest structure;

[0040] Figure 11 The second assembly explosion view of the headrest structure.

[0041] In the figure: 1, mounting base; 201, movable element; 202, connecting element; 2021, first joint; 2022, second joint; 2023, second abutting column; 203, first spring; 204, unlocking / locking strip; 205, unlocking / locking rod; 3, screw; 4, adjusting frame; 401, first sliding groove; 402, second ratchet set; 5, cover plate; 6, chair back frame; 7, threaded hole; 8, headrest frame; 9, sliding seat; 901, clamping groove; 10, limiting element; 1001, through groove; 1002, mounting groove; 11, clamping jaw; 1101, clamping tongue; 2021, first abutting column; 2012, reversing groove; 2013, first ratchet set; 12, second spring; A, locking position; B, unlocking position; C, unlocking / locking critical position. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present utility model.

[0043] The existing technology status: the design of triggering unlocking by separate components, the user needs to operate the unlocking component (such as a button or handle) first, then adjust the headrest position, and finally release the unlocking component, the operation steps are complicated, and unlocking and adjustment need to be matched by two hands, especially in the office scene, single-handed operation is difficult, the separate unlocking component (such as a button or pull rod) is usually small and force concentrated, and is prone to wear or breakage after long-term use, resulting in functional failure, the separate unlocking component needs additional space and connecting mechanism, increasing the complexity and weight of the headrest structure.

[0044] Therefore, the present utility model provides a kind of adjusting mechanism, and the core technical features are that active piece moves along connecting piece radial by the sliding of adjusting frame, and the contact or disengagement of active piece and second ratchet set is controlled by unlocking / locking rod, and the sliding of adjusting frame is utilized to trigger the first spring reset to realize unlocking function and height adjustment.

[0045] By the personnel in the art, the components in the case are sequentially connected, and the specific connection and operation sequence should be referred to the working principle, and the detailed connection means is the public technical knowledge in the art, and the working principle and process are mainly introduced below.

[0046] Embodiment 1, by Figures 1 to 7 It can be known that the adjusting mechanism in the case comprises a mounting base 1, an adjusting frame 4 is slidably arranged on the mounting base 1, the inside of the adjusting frame 4 is provided with a second ratchet set 402, further comprising: a connecting piece 202, which is accommodated in the adjusting frame 4 and fixedly connected with the mounting base 1; an active piece 201, which is movably arranged on one side of the connecting piece 202 and moves along the radial direction of the connecting piece 202; an unlocking / locking rod 205, which penetrates through the active piece 201, and in the movement process, the unlocking / locking rod 205 drives the active piece 201 to contact or disengage the second ratchet set 402, and it needs to be further pointed out that: the adjusting mechanism realizes the locking and unlocking functions of the adjusting frame 4 through the linkage of the unlocking / locking rod 205, the active piece 201, the connecting piece 202 and the second ratchet set 402.

[0047] The specific working principle is as follows:

[0048] 1. Locking: the unlocking / locking rod 205 is located at the locking position A of the reversing groove 2012, the first set of ratchet teeth 2013 on the movable member 201 is in close contact with the second set of ratchet teeth 402 under the action of the elastic member (natural extension state), the ratchet teeth are engaged, the adjusting frame 4 drives the headrest frame 8 to move away from the chair back frame 6 with the stationary mounting base 1 as the reference to adjust the height of the position of the headrest frame 8, due to the characteristics of the ratchet teeth, the adjusting frame 4 can only move in one direction under the condition that the unlocking / locking rod 205 remains unchanged until it reaches the highest position of the adjusting position, the elastic member includes but is not limited to the first spring 203.

[0049] 2. Unlocking: when the adjusting frame 4 reaches the highest position, the lower part of the unlocking / locking rod 204 contacts the adjusting frame 4 and exerts force on each other, the unlocking / locking rod 204 slides upward along the embedding direction until it drives the unlocking / locking rod 205 to rise, the unlocking / locking rod 205 drives the movable member 201 to move away from the second set of ratchet teeth 402 until the unlocking / locking rod 205 is located at the unlocking position B of the reversing groove 2012, the first set of ratchet teeth 2013 of the movable member 201 is disengaged from the second set of ratchet teeth 402, the ratchet teeth are disengaged, the adjusting frame 4 can freely slide along the mounting base 1 towards the chair back frame 6 to realize the reset adjustment of the headrest frame, at this time the first spring 203 is in a compressed state.

[0050] 3. Re-locking: when the adjusting frame 4 reaches the lowest position, the upper part of the unlocking / locking rod 204 contacts the adjusting frame 4 and exerts force on each other, the unlocking / locking rod 204 slides downward along the embedding direction until it drives the unlocking / locking rod 205 to descend, the unlocking / locking rod 205 drives the movable member 201 until the unlocking / locking rod 205 is located at the unlocking / locking critical position C of the reversing groove 2012, at this time the first spring 203 restores the elastic deformation to push the movable member 201 to the locking position A of the reversing groove 2012.

[0051] The above locking, unlocking and re-locking steps complete the height adjustment and reset operation of the headrest frame 8 once.

[0052] Specifically, one end of the first spring 203 is connected with the second abutting column 2023 provided on the first end of the connecting member 202, the other end of the elastic member is connected with the first abutting column 2011 provided on the first end of the movable member 201, during the radial movement of the movable member 201 along the connecting member 202, the first spring 203 is compressed or restores the elastic deformation, so that the movable member 201 maintains the movement trend towards the adjusting frame 4.

[0053] Specifically, the movable member 201 is provided with a reversing groove 2012, the unlocking / locking rod 205 slides along the inner edge of the reversing groove 2012 to drive the movable member 201 to move radially along the connecting member 202, the unlocking / locking rod 205 has three different positions in the reversing groove 2012, which are:

[0054] As shown in Figure 4 , when the adjusting frame 8 is at the lowest position, the release / lock rod 205 is at the lock position A relative to the reversing groove 2012, and provides the space to pull up and away from the back frame 6;

[0055] As shown in Figure 5 , when the adjusting frame 8 is at the highest position, the release / lock rod 205 is at the release position B relative to the reversing groove 2012, the release / lock rod 205 pushes the movable piece 201 to move away from the second ratchet set 402, and keeps relatively static;

[0056] As shown in Figure 6 , when the adjusting frame 8 is pulled down from the highest position to the lowest position and in place, the release / lock rod 205 is at the release / lock critical position C relative to the reversing groove 2012, at this time, the first spring 203 restores the elastic deformation, and pushes the movable piece 201 along the radial direction of the connecting piece 202 to the second ratchet set 402 and the first ratchet set 2013 to engage, returning to Figure 4 As shown in , the release / lock rod 205 is at the lock position A relative to the reversing groove 2012.

[0057] Specifically, the connecting piece 202 is provided with a slot for assembling the release / lock bar 204, and the two end positions of the slot are respectively provided with a first joint 2021 and a second joint 2022:

[0058] When the adjusting frame 8 reaches the adjusting height, due to the one-way nature of the ratchet, the catch is relatively fixed, and the height adjustment is completed;

[0059] When the height needs to be adjusted again, the adjusting frame 8 is pulled up and reaches the highest position, the lower end of the release / lock bar 204 abuts against the surface of the adjusting frame and obtains the upward movement trend, the release / lock bar 204 moves upward along the slot, and the release / lock rod 205 embedded on the release / lock bar 204 is driven to move from the lock position A to the release position B relative to the reversing groove 2012;

[0060] When the adjusting frame 8 is pressed down until it is at the lowest position, the upper end of the release / lock bar 204 abuts against the surface of the adjusting frame and obtains the downward movement trend, the release / lock bar 204 moves downward along the slot, and the release / lock rod 205 embedded on the release / lock bar 204 is driven to move from the release position B to the release / lock critical position C relative to the reversing groove 2012, and finally the release / lock rod 205 reaches the lock position A from the release / lock critical position C under the action of the recovery of the first spring 203.

[0061] Specifically, the release / lock bar 204 is movably arranged, and the release / lock bar 204 is provided with an embedding hole for accommodating the release / lock rod 205 to limit the axial movement of the release / lock rod 205 along the movable piece 201.

[0062] Specifically, the adjusting frame 4 is further provided with a cover plate 5 for wrapping the movable part 201 and the connecting part 202 inside the adjusting frame 4 to prevent accidental unlocking due to accidental touch or vibration and affect the stability and safety of the headrest. Embodiment 2

[0063] As shown in Figures 8 to 11 a headrest structure, comprising a headrest frame 8 and a seat back frame 6, and further comprising the adjusting mechanism in embodiment 2.

[0064] Specifically, the headrest frame 8 is provided with a sliding seat 9 which reciprocates along the first sliding groove 401 of the adjusting frame 4 through an adjusting assembly. It is further pointed out that the adjusting assembly comprises a limiting part 10 which is embedded in the first sliding groove 401 and is provided with a pair of sliding channels so that the sliding seat 9 can extend along the sliding channels or retract into the first sliding groove 401. It is further pointed out that the limiting part 10 is provided with a through groove 1001, and the grooves of the through groove 1001 respectively correspond to a plurality of continuously arranged clamping grooves 901 inside the sliding seat 9 and a clamping tongue 1101 of a clamping jaw 11. The clamping tongue 1101 is inserted into the clamping groove 901 through the through groove 1001 to realize the relative locking of the sliding seat 9 and the adjusting frame 4.

[0065] Specifically, the main body of the clamping jaw 11 is connected with the rotating shaft of the limiting part 10. By pressing one end of the clamping jaw 11 with the hand, the clamping jaw 11 is externally tilted at one end where the clamping tongue 1101 is arranged, the clamping tongue 1101 is separated from the clamping groove 901, and the relative unlocking of the sliding seat 9 and the adjusting frame 4 is realized.

[0066] Specifically, the clamping jaw 11 in the installed state projects on part of the limiting part 10 to form an installation groove 1002 for accommodating the clamping jaw 11 in depth. The end surface of the installation groove 1002 away from the clamping tongue 1101 of the clamping jaw 11 forms a first accommodating groove, and one end of the clamping jaw 11 opposite to the clamping tongue 1101 forms a second accommodating groove. A second spring 12 is arranged between the first accommodating groove and the second accommodating groove. When the clamping jaw 11 is pressed by an external force so that the clamping tongue 1101 is sequentially separated from the clamping groove 901 and the through groove 1001, unlocking is realized, and at this time, the second spring 12 is in a compressed state. When the sliding seat 9 is adjusted to a proper position, the external force is removed, the second spring 12 restores elastic deformation, the clamping tongue 1101 sequentially enters the clamping groove 901 through the through groove 1001, and locking is realized.

[0067] Specifically, the plurality of clamping grooves 901 can be continuously and equidistantly arranged or can be arranged at intervals according to actual adjusting needs.

[0068] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0069] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connecting" and the like should be understood in a broad sense. For example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A regulating mechanism comprising a mounting base (1), a regulating frame (4) is arranged on the mounting base (1) in a sliding manner, a second ratchet set (402) is arranged inside the regulating frame (4), characterized in that: Also comprising: a connecting piece (202) accommodated in the adjusting frame (4) and fixedly connected with the mounting base (1); a movable piece (201) movably arranged on one side of the connecting piece (202) and moving along the radial direction of the connecting piece (202); a release / lock rod (205) penetrating the movable piece (201), the release / lock rod (205) contacting or disengaging the second ratchet set (402) during the movement of the movable piece (201).

2. An adjustment mechanism according to claim 1, wherein: Also comprising an elastic piece, one end of the elastic piece being connected with the first end of the connecting piece (202), the other end of the elastic piece being connected with the first end of the movable piece (201), the elastic piece being compressed or recovered during the radial movement of the movable piece (201), so that the movable piece (201) maintains the movement trend towards the adjusting frame (4).

3. An adjustment mechanism according to claim 1 or 2, characterised in that: The movable piece (201) is provided with a reversing groove (2012), the release / lock rod (205) sliding along the inner edge of the reversing groove (2012) to drive the radial movement of the movable piece (201) along the connecting piece (202).

4. An adjustment mechanism according to claim 3, wherein: The connecting piece (202) is movably provided with a release / lock strip (204), the release / lock strip (204) being provided with an embedding hole for accommodating the release / lock rod (205) to limit the axial movement of the release / lock rod (205) along the movable piece (201).

5. An adjustment mechanism according to claim 4, wherein: The movable piece (201) is provided with a first ratchet set (2013), the first ratchet set (2013) engaging or disengaging the second ratchet set (402) during the movement of the movable piece (201) to enable the one-way movement of the adjusting frame (4).

6. A headrest structure comprising: The headrest frame (8) and the backrest frame (6) are characterized in that the adjusting mechanism of any one of claims 1 to 5 is further included.

7. A headrest structure according to claim 6, wherein: The headrest frame (8) is provided with a sliding seat (9), the sliding seat (9) reciprocating along the first sliding groove (401) of the adjusting frame (4) through the adjusting assembly.

8. A headrest structure according to claim 7, wherein: The adjusting assembly comprises: a limiting piece (10) embedded in the first sliding groove (401) and provided with a pair of sliding channels, so that the sliding seat (9) extends or retracts into the first sliding groove (401) along the sliding channels; a clamping jaw (11) rotatably connected with the limiting piece (10), the clamping jaw (11) disengaging or inserting the sliding seat (9).

9. A seat, characterized by The headrest structure of any one of claims 6 to 8 is included.

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