Chair and chair seat front-back moving mechanism thereof

Abstract

The utility model discloses a chair and a chair seat back-and-forth moving mechanism thereof, the chair comprises a base and a seat plate used for installing a cushion, and the seat plate is installed on the base in a sliding manner; a first groove and a second groove are formed in the top of the base, one end of the first groove communicates with the second groove, a slidable spring bolt is installed in the first groove, and a locking spring used for driving the end of the spring bolt to stretch into the second groove is arranged between the spring bolt and the inner wall of the first groove; a plurality of clamping protrusions arranged front and back are arranged at the bottom of the seat plate, and the clamping protrusions correspond to the second grooves in position. A clamping groove is formed in the end of the spring bolt, the spring bolt can be connected with the clamping protrusion of the base plate in an inserted mode after extending into the second groove, and the base and the base plate are fixed. In the structure, the locking mechanism is hidden in the base, so that the mechanism of the chair is more compact, and the size is smaller.

Description

Technical Field

[0001] This utility model relates to the field of home furnishings, and in particular to a chair and its seat forward and backward moving mechanism. Background Technology

[0002] Chairs have become an essential piece of furniture in people's daily lives, and most chairs have the function of adjusting the backrest angle. The chair tray, as an important connecting and control component, is particularly important, as its safety and stability directly affect the overall use of the chair.

[0003] The prior art disclosed in CN214595099U is a movable seat device, in which a slide rail on a fixed seat is connected to the upper surface of the seat chassis, and a sliding seat is connected to the lower surface of the seat cushion. When it is necessary to adjust the fore-and-aft distance of the seat cushion, simply open the locking mechanism, unlock the sliding seat, and move the sliding seat so that the strip-shaped through hole on the sliding seat moves back and forth relative to the slide rail on the fixed seat. Thus, the sliding seat can drive the seat cushion to move back and forth relative to the seat chassis, thereby adjusting the fore-and-aft distance of the seat cushion. After the adjustment is in place, simply close the locking mechanism to lock the sliding seat, thereby fixing the position of the seat cushion and preventing it from moving again.

[0004] In the prior art, the structure for locking the seat is located at the edge of the sliding seat, which causes uneven force on the sliding seat and thus affects the movement of the sliding seat; and the locking structure is located at the edge of the seat plate, which increases the size of the seat. Utility Model Content

[0005] In order to solve the problems in the prior art, the purpose of this utility model is to provide a chair and its seat forward and backward movement mechanism. The mechanism is set inside the seat plate, making the structure more compact and concealed, and thus making the locking of the seat plate more stable and reliable.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a chair seat forward and backward moving mechanism, including a base and a seat plate for mounting a cushion, the seat plate being slidably mounted on the base; the top of the base is provided with a first groove and a second groove, one end of the first groove communicating with the second groove, a slidable locking tongue being installed in the first groove, and a locking spring being provided between the locking tongue and the inner wall of the first groove for driving the end of the locking tongue to extend into the second groove; the bottom of the seat plate is provided with a plurality of front and rear arranged latching protrusions, the positions of the latching protrusions corresponding to the second groove; the end of the locking tongue is provided with a latching groove, and after the locking tongue extends into the second groove, it can be inserted into the latching protrusion of the seat plate to fix the base and the seat plate.

[0007] Preferably, a return spring is provided between the base and the seat plate.

[0008] Preferably, the top of the base is provided with a spring groove, and the return spring is disposed in the spring groove. The two ends of the return spring are connected to the base and the seat plate, respectively.

[0009] Preferably, the spring groove passes through the first groove, and the lock tongue is provided with a clearance hole, through which the return spring passes.

[0010] Preferably, a second through hole is provided on the base plate, one end of the return spring is fixed to the base by a fastener, and the other end of the return spring is hooked onto the base plate through the second through hole.

[0011] Preferably, the base has a mounting groove at the top, and the cover plate 17 is fixed in the mounting groove. The cover plate seals the first groove and restricts the movement of the locking tongue within the first groove.

[0012] Preferably, the locking tongue includes a base, one end of which has a locking part protruding and a slot is provided on the locking part, the other end of which has a connecting part protruding and a clearance hole is provided in the middle of the base; the base is provided in a first groove, the locking part can extend into a second groove, the connecting part is fixedly connected to the cable, and the locking spring abuts against the connecting part.

[0013] Preferably, pulling the cable can disengage the latch from the locking protrusion on the base plate, and the locking spring is used to engage the locking part of the latch with the locking protrusion on the base plate.

[0014] Preferably, the base plate has a first through hole, and a portion of the base plate located in the first through hole is bent downward to form a plug-in part. The plug-in part extends into the second groove, and multiple locking protrusions are provided at the end of the plug-in part.

[0015] A chair, including the aforementioned seat forward and backward movement mechanism.

[0016] The beneficial effects of the technical solution of this utility model are as follows: the chair seat installed on the tray has the function of moving back and forth, the locking tongue and the three adjacent locking protrusions can form a limiting structure, the locking tongue forms another set of limiting structures through the locking groove and a single locking protrusion, and the inner and outer sets of limiting structures are set inside and outside, thereby improving the locking ability of the seat plate and the base; in the above structure, the locking mechanism is hidden inside the base, thereby making the chair structure more compact and smaller in size. Attached Figure Description

[0017] Figure 1 A schematic diagram of the chair seat's forward and backward movement mechanism;

[0018] Figure 2 This is a schematic diagram of the chair seat's forward and backward movement mechanism after the seat plate has been removed.

[0019] Figure 3 This is a schematic diagram of the chair seat's forward and backward movement mechanism after the seat plate and cover plate have been removed.

[0020] Figure 4 This is a schematic diagram of the connection structure of the locking tongue, return spring, and cable.

[0021] Figure 5 This is a schematic diagram of the base structure;

[0022] Figure 6 This is a schematic diagram of the base plate.

[0023] Reference numerals: 11, base; 111, limiting part; 112, first groove; 113, mounting groove; 114, spring groove; 115, second groove; 12, seat plate; 121, waist-shaped groove; 122, first through hole; 123, insertion part; 124, latching protrusion; 125, second through hole; 13, locking tongue; 131, locking part; 132, latching groove; 133, clearance hole; 134, connecting part; 14, cable; 15, fastener; 16, return spring; 17, cover plate. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In this utility model, "up" and "down" are "up" and "down" in the normal sense. The direction that people face when sitting in a chair is "front" and the direction that they turn away from is "back". The left hand is on the "left" side and the right hand is on the "right" side. Example

[0030] like Figures 1 to 6 The chair seat forward and backward movement mechanism shown includes a base and a seat plate 12 for mounting a seat cushion, the seat plate 12 being slidably mounted on the base 11;

[0031] The base 11 has a first groove 112 and a second groove 115 on its top. One end of the first groove 112 is connected to the second groove 115. A slidable locking tongue 13 is installed in the first groove 112. A locking spring is provided between the locking tongue 13 and the inner wall of the first groove 112 to drive the end of the locking tongue 13 into the second groove 115. The bottom of the seat plate 12 has a plurality of front and rear-arranged locking protrusions 124, which are located in the second groove. The end of the locking tongue 13 has a locking groove 132. After the locking tongue 13 extends into the second groove 115, it can be inserted into the locking protrusions 124 of the seat plate 12 to fix the base 11 and the seat plate 12.

[0032] This design allows the chair seat mounted on the tray to move back and forth. A limiting structure can be formed between the locking tongue and the three adjacent latches. The locking tongue can then form another limiting structure through the latch groove and a single latch. With the inner and outer limiting structures set inside and out, the locking ability of the seat plate and base can be improved.

[0033] In this embodiment, a return spring 16 is provided between the base 11 and the seat plate 12.

[0034] In a further preferred embodiment, the top of the base 11 is provided with a spring groove 114, and a return spring 16 is disposed in the spring groove 114, with the two ends of the return spring 16 connected to the base 11 and the seat plate 12 respectively.

[0035] In a further preferred embodiment, the spring groove 114 extends through the first groove 112, and the locking tongue 13 has an clearance hole 133, through which the return spring 16 passes.

[0036] In this embodiment, a second through hole 125 is provided on the base plate 12. One end of the reset spring 16 is fixed to the base 11 by a fastener, and the other end of the reset spring 16 hooks the base plate 12 through the second through hole 125.

[0037] In this embodiment, the base 11 has a mounting groove 113 on its top, a first groove 112 is provided in the mounting groove 113, and a cover plate 17 is fixed in the mounting groove 113. The cover plate 17 seals the first groove 112 and restricts the locking tongue 13 in the first groove 112 to prevent the locking tongue 13 from moving up and down.

[0038] In this embodiment, the latch includes a base, one end of which has a protruding locking portion 131 and a slot 132 disposed on the locking portion 131. The other end of the base has a protruding connecting portion 134 and a clearance hole 133 disposed in the middle of the base. The base is disposed in a first slot 112, the locking portion 131 can extend into a second slot 113, the connecting portion 134 is fixedly connected to the cable 14, and a locking spring abuts against the connecting portion 134. By pulling the cable 14, the latch 13 can be driven to engage or disengage from the latch protrusion 124 on the base plate 12, and the locking spring is used to drive the locking portion 131 of the latch to engage with the latch protrusion on the base plate.

[0039] In this embodiment, one end of the cable 14 is fixedly connected to the locking tongue 13. By pulling the cable 14, the locking tongue 13 can be driven to disengage from the latch 124 on the seat plate 12.

[0040] In this embodiment, a first through hole 122 is provided on the base plate 12. A portion of the base plate 12 located within the first through hole 122 is bent downward to form a plug-in portion 123. The plug-in portion 123 extends into the second groove 115, and multiple locking protrusions 124 are provided at the ends of the plug-in portion 123. This arrangement facilitates the manufacture of components through cold treatment, effectively reducing the manufacturing cost of the components.

[0041] In this embodiment, a waist-shaped groove 121 is provided on the seat plate 12, and a limiting part 111 protrudes from the base 11. The limiting part 111 extends into the waist-shaped groove 121 and abuts against the side wall of the waist-shaped groove 121. A fastener 15 is fixed to the top of the limiting part 111. The fastener 15 presses the seat plate 12 onto the base 11 to prevent the seat plate 12 from moving up and down.

[0042] More preferably, there are multiple waist-shaped grooves 121, and the multiple waist-shaped grooves 121 are symmetrically arranged on the left and right sides of the seat plate 12.

[0043] A chair includes the aforementioned seat forward and backward movement mechanism, a support leg is installed under the base 11, a backrest is installed at the rear of the base 11, and the seat is installed on the seat plate 12.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A chair seat forward and backward moving mechanism, characterized in that: Includes a base and a seat plate (12) for mounting the seat cushion, the seat plate (12) being slidably mounted on the base (11); The base (11) has a first groove (112) and a second groove (115) on its top. One end of the first groove (112) is connected to the second groove (115). A sliding locking tongue (13) is installed in the first groove (112). A locking spring is provided between the locking tongue (13) and the inner wall of the first groove (112) to drive the end of the locking tongue (13) into the second groove (115). The bottom of the seat plate (12) has a plurality of front and rear locking protrusions (124). The position of the locking protrusions (124) corresponds to the second groove. The end of the locking tongue (13) has a locking groove. After the locking tongue (13) extends into the second groove (115), it can be inserted into the locking protrusions (124) of the seat plate (12) to fix the base (11) and the seat plate (12).

2. The chair seat forward and backward moving mechanism according to claim 1, characterized in that: A return spring (16) is provided between the base (11) and the seat plate (12).

3. The chair seat forward and backward moving mechanism according to claim 2, characterized in that: The top of the base (11) is provided with a spring groove (114), and the reset spring (16) is provided in the spring groove (114). The two ends of the reset spring (16) are connected to the base (11) and the seat plate (12) respectively.

4. The chair seat forward and backward moving mechanism according to claim 2, characterized in that: The spring groove (114) passes through the first groove (112), and the locking tongue (13) is provided with a clearance hole (133), through which the return spring (16) passes.

5. The chair seat forward and backward moving mechanism according to claim 2, characterized in that: A second through hole (125) is provided on the seat plate (12). One end of the reset spring (16) is fixed to the base (11) by a fastener, and the other end of the reset spring (16) hooks the seat plate (12) through the second through hole (125).

6. The chair seat forward and backward moving mechanism according to claim 1, characterized in that: The base (11) has a mounting groove (113) on top. The cover plate (17) is fixed in the mounting groove (113). The cover plate (17) seals the first groove (112) and restricts the locking tongue (13) from moving in the first groove (112).

7. The chair seat forward and backward moving mechanism according to claim 1, characterized in that: The locking tongue includes a base, one end of which protrudes a locking part (131), a slot (132) is provided on the locking part (131), the other end of which protrudes a connecting part (134), and a clearance hole (133) is provided in the middle of the base; the base is provided in the first groove (112), the locking part (131) can extend into the second groove (113), the connecting part (134) is fixedly connected to the cable (14), and the locking spring abuts against the connecting part (134).

8. The chair seat forward and backward moving mechanism according to claim 7, characterized in that: Pulling the cable (14) can cause the latch (13) to disengage from the latch (124) on the seat plate (12), and the locking spring is used to drive the locking part (131) of the latch to engage with the latch (124) on the seat plate.

9. The chair seat forward and backward moving mechanism according to claim 1, characterized in that: A first through hole (122) is provided on the seat plate (12). The part of the seat plate (12) located in the first through hole (122) is bent downward to form a plug-in part (123). The plug-in part (123) extends into the second groove (115). Multiple locking protrusions (124) are provided at the end of the plug-in part (123).

10. A chair, characterized in that: The chair seat forward and backward movement mechanism includes any one of the above claims 1-9.

Images