Chair and pedal lifting structure thereof

Abstract

The utility model discloses a chair and a pedal lifting structure thereof, which comprises supporting legs, a pedal plate and two groups of lifting mechanisms, the pedal plate is positioned between the two supporting legs, the two ends of the pedal plate are respectively provided with one group of lifting mechanism, and the pedal plate is connected with the supporting legs through the lifting mechanisms; a plurality of first lock holes which are formed from top to bottom are formed in the supporting legs; the lifting mechanism comprises a spring bolt, a button and a reset piece. The spring bolt is installed on the pedal in a sliding mode, the spring bolt is connected with the first lock hole in a pluggable mode, and the spring bolt can slide in the extending direction of the first lock hole; the button is slidably mounted on the pedal, and the lock tongue can be driven to be separated from the first lock hole by pressing the button; the reset piece is used for driving the bolt to insert into the first lock hole. Through the arrangement, lifting of the pedal plate can be achieved only through two-hand operation, then misoperation can be effectively prevented, the spring bolt and the pedal plate move synchronously, and then the adjusting process is simpler.

Description

Technical Field

[0001] The utility model relates to the field of home furnishings, in particular to a chair and a footrest lifting structure thereof. Background Art

[0002] Existing chairs pay more and more attention to comfort, so some existing chairs have multiple adjustment methods and adjustment structures, including headrests that can be adjusted up and down, chair backs that can be adjusted in angle, seat cushions that can be adjusted in height, and foot pads that can provide support for the feet and calves.

[0003] The prior art with publication number CN219699451U discloses a seat footrest and a seat that can be adjusted up and down, and the seat footrest includes: a footrest body, including a footrest and a footrest support rod fixed to the bottom of the footrest; a footrest support seat, which has a slide inside, and the footrest support rod can be slid up and down and installed in the slide; a locking member, which is installed on the footrest support seat and has a locking part that can extend into the slide and abut against the footrest support rod for sliding locking.

[0004] In the prior art, the locking member is installed on the pedal support seat, and the pedal support rod and the pedal support seat are plugged in. This means that when the pedal is re-fixed, the user needs to support the pedal while operating the locking member, making the pedal adjustment process more troublesome and larger in size. Summary of the Invention

[0005] In order to solve the problem of the cumbersome height adjustment process of the footrest in the prior art, the purpose of the present invention is to provide a chair and its footrest lifting structure, in which the footrest and the structure for locking the footrest move synchronously, so that the locking and unlocking of the footrest are carried out synchronously, thereby facilitating the adjustment of the height of the footrest.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a foot pedal lifting structure, including a supporting leg, a foot pedal and two sets of lifting mechanisms, the foot pedal is located between the two supporting legs, and a set of lifting mechanisms is installed at each end of the foot pedal, and the foot pedal is connected to the supporting leg through the lifting mechanism; a plurality of first locking holes arranged from top to bottom are provided on the supporting leg; the lifting mechanism includes a locking tongue, a button and a reset member; the locking tongue is slidably mounted on the foot pedal, the locking tongue is plugged and unplugged into the first locking hole, and the locking tongue can slide in the extension direction of the first lock hole; the button is slidably mounted on the foot pedal, and the locking tongue can be driven to disengage from the first lock hole by pressing the button; the reset member is used to drive the locking tongue to insert into the first lock hole.

[0007] Preferably, the lifting mechanism also includes a guide rail and a guide block, the guide rail is fixed on the support leg of the chair, the guide block is fixed on the foot pedal, and the guide rail and the guide block are slidably matched; the first lock hole is arranged on the guide rail, and the lock tongue, button and reset member are all arranged on the guide block.

[0008] Preferably, an opening is provided at one end of the guide block facing the foot pedal, and a second lock hole connected to the opening is provided on the guide block. The lock tongue is located in the opening of the guide block, and one end of the lock tongue extends from the second lock hole and is plugged into the first lock hole, and the lock tongue and the second lock hole slide together.

[0009] Preferably, a third limiting portion and a fourth limiting portion are protruded in the opening, and the third limiting portion and the fourth limiting portion are arranged on the upper and lower sides of the second lock hole. The third limiting portion and the fourth limiting portion clamp the lock tongue, and the third limiting portion and the fourth limiting portion slide in cooperation with the lock tongue.

[0010] Preferably, a through hole is provided on the button, and the third limiting portion and the fourth limiting portion are inserted into the through hole on the button, and the third limiting portion and the fourth limiting portion are both slidably engaged with the button.

[0011] Preferably, the bottom of the guide block is provided with an escape opening connected to the opening, the bottom of the button extends out of the escape opening, and the button is slidably engaged with the guide block.

[0012] Preferably, the reset member includes a spring, and two ends of the spring respectively abut against the guide block and the button.

[0013] Preferably, a linkage portion is raised on the lock tongue, an inclined driving hole is opened on the button, and the linkage portion is inserted into the driving hole; when the button moves, the inner wall of the driving hole can push the linkage portion to disengage or connect the lock tongue with the first lock hole.

[0014] Preferably, a through hole is provided on the button, the lock tongue is inserted into the through hole of the button, two driving holes are provided on both sides of the through hole, the driving hole and the through hole are connected to each other, and two linkage parts arranged opposite to each other on the lock tongue are respectively inserted into the two driving holes.

[0015] A chair comprises the above-mentioned footrest lifting structure.

[0016] The beneficial effects of the technical solution of the present invention are as follows: the foot pedal can independently complete the lifting action, and thus can be suitable for more people; the structure for controlling the lifting of the foot pedal in the above solution is simpler, and thus it is convenient for the manufacture, assembly and maintenance of the lifting structure; the above solution requires two-handed operation to realize the lifting of the foot pedal, and thus it can effectively prevent misoperation; when adjusting the height of the foot pedal, the lock tongue, button, guide block and foot pedal move synchronously, and thus the adjustment process of adjusting the foot pedal height is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a chair;

[0018] Figure 2 It is a structural diagram of the pedal lifting structure;

[0019] Figure 3 Schematic diagram of the structure of the guide mechanism;

[0020] Figure 4 Schematic diagram of the connection structure between the guide block and the locking assembly Figure 1 ;

[0021] Figure 5 Schematic diagram of the connection structure between the guide block and the locking assembly Figure 2 ;

[0022] Figure 6 Schematic diagram of the guide block structure Figure 1 ;

[0023] Figure 7 Schematic diagram of the guide block structure Figure 2 ;

[0024] Figure 8 is a structural diagram of the locking assembly;

[0025] Figure 9 It is a structural diagram of the lock tongue.

[0026] Reference numerals: 1, chair leg; 2, support leg; 7, chair seat; 8, chair back; 9, lifting mechanism; 10, footrest;

[0027] 91. Guide rail; 911. First locking hole; 912. Connecting hole; 92. Guide block; 921. Hook; 922. Mounting hole; 923. Second locking hole; 924. Avoidance; 925. First limiting portion; 926. Second limiting portion; 927. First positioning column; 928. Third limiting portion; 929. Fourth limiting portion; 920. Fifth limiting portion; 93. Button; 931. Through hole; 932. Drive hole; 933. Second positioning column; 94. Lock tongue; 941. Locking portion; 942. Linkage portion; 95. Limiting member. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Example

[0033] like Figures 1 to 9 The foot pedal lifting structure shown includes a support leg 2, a foot pedal 10 and two sets of lifting mechanisms 9. The foot pedal 10 is located between the two support legs 2, and the two ends of the foot pedal 10 are connected to the two support legs 2 through a set of lifting mechanisms 9;

[0034] The lifting mechanism 9 includes a guide assembly and a locking assembly; the guide assembly includes a guide rail 91 and a guide block 92, the guide rail 91 is fixed to the support leg 2 of the chair, the guide block 92 is fixed to the footrest 10, the guide block 92 is mounted on the guide rail 91 and slidably fits, and a plurality of first locking holes 911 arranged vertically are opened on the guide rail 91;

[0035] The locking assembly includes a button 93 and a lock tongue 94; the button 93 and the lock tongue 94 are both slidably mounted on the guide block 92, the lock tongue 94 is plug-in connected to the first lock hole 911, a linkage portion 942 is raised on the lock tongue 94, an inclined drive hole 932 is opened on the button 93, the linkage portion 942 is inserted into the drive hole 932; when the button 93 moves, the inner wall of the drive hole 932 can push the linkage portion 942 to disengage or connect the lock tongue 94 to the first lock hole 911.

[0036] With such a configuration, the foot pedal 10 can independently complete the lifting action, and can be suitable for more people; the structure for controlling the lifting of the foot pedal 10 in the above scheme is simpler, and is convenient for the manufacture, assembly and maintenance of the lifting structure; the above scheme requires two-hand operation to realize the lifting of the foot pedal 10, and can effectively prevent misoperation.

[0037] In this embodiment, the guide block 92 has a first stopper 925 and a second stopper 926 protruding from it. The first stopper 925 and the second stopper 926 are arranged on the left and right sides. The button 93 is located between the first stopper 925 and the second stopper 926. The first stopper 925 and the second stopper 926 are both connected to and slidably engaged with the button 93. This arrangement can effectively limit the movement path of the button 93.

[0038] In this embodiment, Figure 3 、 Figure 5 and Figure 7 As shown, the guide block 92 further has a third limiting portion 928 and a fourth limiting portion 929 protruding therefrom. The third limiting portion 928 and the fourth limiting portion 929 are arranged vertically, and the lock tongue 94 is arranged between the third limiting portion 928 and the fourth limiting portion 929 and slidably engages therebetween. This arrangement can effectively limit the movement path of the lock tongue 94.

[0039] In this embodiment, Figures 3 to 8As shown, the button 93 is provided with a through hole 931, and the driving hole 932 on the button 93 extends in the front-to-back direction and passes through the through hole 931. The lock tongue 94, the third limiting portion 928, and the fourth limiting portion 929 are all inserted into the through hole 931 of the button 93. The third limiting portion 928 and the fourth limiting portion 929 on the guide block 92 are connected to the inner wall of the through hole 931 and slide together. The guide block 92 is provided with a second lock hole 923, which is located between the third limiting portion 928 and the fourth limiting portion 929. One end of the lock tongue 94 extends from the second lock hole 923 and then plugs and unplugs into the first lock hole 911 on the guide rail 91. Furthermore, the linkage portion 942 on the lock tongue 94 is wedge-shaped with an inclined surface. This arrangement facilitates the assembly of the various components of the lifting structure. The button 93, the lock tongue 94, and the guide block 92 are interconnected, which also makes the connection between the various components more compact, improves the effect, and simplifies the structure.

[0040] In this embodiment, Figure 3 、 Figure 5 and Figure 9 As shown, the locking tongue 94 has a protruding locking portion 941, which extends from the second locking hole 923 and then plugs into and unplugs from the first locking hole 911 on the guide rail 91. The first locking hole 911 and the second locking hole 923 both match the locking portion 941. This arrangement effectively limits the position of the locking tongue 94 on the guide block 92.

[0041] This embodiment also includes a reset member disposed between the guide block 92 and the button 93. This reset member is used to reset the button 93 and engage the lock tongue 94 with the first lock hole 911. Furthermore, the guide block 92 is provided with a fifth stopper 920, on which a first positioning post 927 protrudes, and the button 93 is provided with a second positioning post 933 protrudes. The reset member includes a spring, with its ends respectively sleeved over the first positioning post 927 and the second positioning post 933. This arrangement ensures the consistency and stability of the spring's movement direction.

[0042] In this implementation, if Figure 2 、 Figure 3 、 Figure 5 and Figure 6As shown, one end of the guide block 92 is connected to the guide rail 91. The end of the guide block 92 facing the footrest is provided with an opening. The second lock hole 923 is connected to the opening in the lock block. The first limiter 925, the second limiter 926, the third limiter 928, the fourth limiter 929, the fifth limiter 920, the lock tongue 94, and the button 93 are all disposed within the opening of the guide block 92. Furthermore, the opening in the guide block 92 is disposed toward the footrest 10. The end of the footrest 10 is provided with a mounting opening, into which the guide block 92 is plugged. This arrangement facilitates the installation of the locking assembly on the guide block 92; the footrest 10 can block the opening in the guide block 92, thereby maintaining the appearance and stability of the lifting structure.

[0043] In this embodiment, Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the bottom of the guide block 92 is provided with a avoidance opening communicated with the opening, and the bottom of the button 93 extends out from the avoidance opening 924 on the guide block 92. So arranged, the user must operate from the bottom of the foot pedal 10, thereby further preventing misoperation.

[0044] In this embodiment, Figure 4 and Figure 6 As shown, a retractable stopper 95 is mounted on the guide block 92. One end of the stopper 95 protrudes from the guide block 92 and abuts the guide rail 91. Specifically, the stopper 95 comprises a mounting seat, a stopper rod, and a positioning spring. One end of the stopper rod is inserted into the mounting seat, and the positioning spring is disposed between the mounting seat and the stopper rod. The guide block 92 is provided with a mounting hole 922, and the mounting seat is plugged into the mounting hole. Furthermore, one end of the stopper rod is a ball end, which extends from the mounting seat and abuts the guide rail 91. This arrangement allows for a smoother raising and lowering process of the footrest 10.

[0045] In this embodiment, the guide rail 91 is provided with a slide groove at both its front and rear ends, and the guide block is provided with two hooks 921, which are respectively inserted into the two slide grooves and slide together. This arrangement can effectively limit the relative position of the guide block 92 on the guide rail 91, thereby ensuring the stability of the support of the footrest 10.

[0046] In this embodiment, Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, a connecting hole 912 is provided on the guide rail 91 , and a bolt is fixedly connected to the support leg 2 through the connecting hole 912 .

[0047] When adjusting the height of the foot pedal, the user pushes the buttons on both sides of the foot pedal upward with both hands. The buttons compress the spring, and the buttons push the linkage part of the lock tongue through the inclined surface of the driving hole, so that the lock tongue disengages from the first lock hole of the guide rail. When the foot pedal is adjusted to the right position, the user releases the button, the spring releases and presses the button downward, and the button pushes the linkage part of the lock tongue through the inclined surface of the driving hole, so that the lock tongue is inserted into the first lock hole of the guide rail until the button connects with the third limit part in the guide block.

[0048] A chair, such as Figure 1 and Figure 2 As shown, the chair includes the above-mentioned foot-lifting structure, and the chair also includes a seat 7, a backrest 8 and a leg 1. The two legs 1 are respectively at the bottom of the two support legs 2, and the foot pedal 10 is arranged between the two support legs 2. The foot pedal 10 is connected to the support leg 2 through the foot-lifting mechanism 9. The two support legs 2 are fixedly connected by a connecting rod. The seat 7 is installed on the connecting rod, and the two ends of the backrest 8 are respectively fixedly connected to the top of the two support legs 2.

[0049] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A pedal lifting structure, characterized in that: The footrest comprises a support leg (2), a footrest (10) and two sets of lifting mechanisms (9), wherein the footrest (10) is located between the two support legs (2), a set of lifting mechanisms (9) is respectively installed at both ends of the footrest (10), and the footrest (10) is connected to the support leg (2) via the lifting mechanisms (9); The supporting leg (2) is provided with a plurality of first locking holes (911) arranged from top to bottom; The lifting mechanism (9) includes a locking tongue (94), a button (93) and a reset member; The locking tongue (94) is slidably mounted on the foot pedal (10), the locking tongue (94) is pluggably connected to the first locking hole (911), and the locking tongue (94) can slide in the extension direction of the first locking hole (911); The button (93) is slidably mounted on the foot pedal (10), and the locking tongue (94) can be driven to disengage from the first locking hole (911) by pressing the button (93); The reset member is used to drive the lock tongue (94) to insert into the first lock hole (911).

2. A pedal lifting structure according to claim 1, characterized in that: The lifting mechanism further comprises a guide rail (91) and a guide block (92), wherein the guide rail (91) is fixed on the support leg (2) of the chair, and the guide block (92) is fixed on the footrest (10), and the guide rail (91) and the guide block (92) are slidably matched; a first lock hole (911) is provided on the guide rail (91), and a lock tongue (94), a button (93) and a reset member are all provided on the guide block (92).

3. The pedal lifting structure according to claim 2, characterized in that: An opening is provided at one end of the guide block (92) facing the foot pedal (10), and a second lock hole (923) communicating with the opening is provided on the guide block (92). A lock tongue (94) is located in the opening of the guide block (92), and one end of the lock tongue (94) extends from the second lock hole (923) and is plugged into the first lock hole (911). The lock tongue (94) and the second lock hole (923) are slidably matched.

4. The pedal lifting structure according to claim 3, characterized in that: A third limiting portion (928) and a fourth limiting portion (929) are protruded in the opening. The third limiting portion (928) and the fourth limiting portion (929) are respectively arranged on the upper and lower sides of the second lock hole (923). The third limiting portion (928) and the fourth limiting portion (929) clamp the lock tongue (94). The third limiting portion (928) and the fourth limiting portion (929) are slidably matched with the lock tongue (94).

5. The pedal lifting structure according to claim 4, characterized in that: The button (93) is provided with a through hole (931), the third limiting portion (928) and the fourth limiting portion (929) are inserted into the through hole (931) on the button (93), and the third limiting portion (928) and the fourth limiting portion (929) are both slidably engaged with the button (93).

6. The pedal lifting structure according to claim 5, characterized in that: The bottom of the guide block (92) is provided with a relief opening (924) communicating with the opening, the bottom of the button (93) extends from the relief opening (924), and the button (93) and the guide block (92) are slidably matched.

7. The pedal lifting structure according to claim 2, characterized in that: The reset member comprises a spring, and two ends of the spring respectively abut against the guide block (92) and the button (93).

8. The pedal lifting structure according to claim 1, characterized in that: A linkage portion (942) is protruded from the lock tongue (94), and an inclined driving hole (932) is provided on the button (93), and the linkage portion (942) is inserted into the driving hole (932); when the button (93) moves, the inner wall of the driving hole (932) can push the linkage portion (942) to disengage or connect the lock tongue (94) with the first lock hole (911).

9. The pedal lifting structure according to claim 8, characterized in that: A through hole is provided on the button (93), the lock tongue is inserted into the through hole (931) of the button (93), two driving holes (932) are respectively provided on both sides of the through hole (931), the driving hole (932) and the through hole (931) are communicated with each other, and two linkage parts arranged opposite to each other on the lock tongue (94) are respectively inserted into the two driving holes (932).

10. A chair, characterized in that: It comprises a pedal lifting structure as described in any one of claims 1 to 9.

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