Foot rest drawing rod of chair, foot rest drawing adjusting mechanism and seat

Abstract

The utility model provides a footrest drawing rod of a chair, a footrest drawing adjusting mechanism and a seat, the drawing rod comprises two guide rods which are arranged in parallel at an interval, at least one guide rod is bent at the tail part to form a limiting part, the guide rods are endowed with a limiting function, the step of installing a limiting structure is omitted, and the installation time is reduced; the drawing rod is connected to a guide rod seat of the foot rest drawing adjusting mechanism on the seat in a sliding manner, so that the guide rod is matched with the guide rod seat for limiting when the guide rod slides to the position farthest from the guide rod seat, and the foot rest of the seat is convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of office chairs, in particular to a footrest pull-out rod of a chair, a footrest pull-out adjustment mechanism and a seat. Background Art

[0002] Office chairs are a common office tool in daily life. When purchasing an office chair, you can choose accessories, including headrests, footrests, neck pillows, lumbar pillows, etc. Among them, the office chair footrest, as an optional accessory, also has a lot of loyal fans.

[0003] At present, the pull-out rods used in the sliding pull-out mechanism of most footrests on the market are mostly rectangular pull-out rods with flat cross-sections. This kind of rod is installed in the guide rod seat, which is fixed to the middle bottom side of the seat by screws. It can only slide forward and backward, but cannot rotate. It has high precision and can support the footrest. In actual use, a limit cover with a longitudinal section larger than the pull-out rod is often set at the tail end of the rod, mostly in an embedded or screw-fastened manner. When the rod is pulled out, it presses against the installation seat of the pull-out rod to prevent the rod from being pulled out completely.

[0004] However, this design has many problems. The first is that the pull-out rod is mostly made of steel, which makes this component heavy and inconvenient to install; the second is that an extra step is required to install the limit cover. And if the limit cover is designed to be embedded, when the office chair footrest is used for a long time or is pulled out many times, the user will use too much force when pulling out the footrest, which will cause the limit cover and the mounting seat to collide and fall off, thereby losing the limiting function. Although the limit cover can be inserted back into place, after too many times, the limit cover will be worn, and the friction will become smaller and smaller until it can no longer play the original limiting function. If the limit cover is set to be screw-fastened, an additional step of tightening the screws is required.

[0005] Based on the above problems, a new guide rod is needed to ensure the original functionality while optimizing the limit function and reducing the necessary installation steps. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a footrest pull-out rod for a chair, comprising two guide rods arranged in parallel, at least one of which has a tail bent to form a limiting portion, integrating the limiting function into the tail of the guide rod, thereby optimizing the limiting structure that needs to be additionally installed in the original design, and eliminating the time and steps for installing the limiting structure.

[0007] A footrest pull-out adjustment mechanism is further provided, in which two guide rods arranged in parallel and at intervals are inserted into two track grooves of the guide rod seat. When the two guide rods slide synchronously to the farthest position of the guide rod seat, the limiting part integrated at the tail of the guide rod itself cooperates with the guide rod seat to limit the position.

[0008] A seat is further provided in which the above-mentioned footrest pull-out adjustment mechanism is fixedly connected to the middle position of the bottom side of the seat cushion, so that when the guide rod slides to the position farthest from the guide rod seat, it is limited by the cooperation of the limiting part and the guide rod seat, which is convenient for the use of the footrest of the seat.

[0009] The technical solution of the utility model is achieved in this way:

[0010] A footrest pull-out rod for a chair comprises two guide rods which are arranged in parallel and at intervals, wherein at least one of the guide rods is bent inwards at the tail to form a limiting portion.

[0011] Preferably, the pull-out rod is formed by bending a whole rod in the middle, and the bending position in the middle of the whole rod forms the limiting portion; the pull-out rod formed by bending a whole rod has its own limiting function, thereby omitting the limiting cover that needs to be installed additionally, thereby achieving the purpose of reducing the installation steps.

[0012] Preferably, the limiting portion is arc-shaped or straight-shaped; either the arc-shaped or straight-shaped portion can achieve the purpose of limiting.

[0013] Preferably, the two guide rods are bent toward each other at the tail to form the limiting portion, and the two limiting portions are not connected or are fixedly connected by welding.

[0014] Preferably, the guide rod is a cylindrical solid rod with a diameter of 6 mm-10 mm.

[0015] Preferably, the guide rod is a solid elliptical rod or a square rod, and the maximum width or maximum height of the guide rod section does not exceed 10 mm.

[0016] A footrest pull-out adjustment mechanism is further provided, comprising a footrest pull-out rod and a guide rod seat of the above-mentioned chair, the front end of the guide rod is connected to the footrest via a connecting seat, the guide rod seat is provided with a track groove for slidingly cooperating with the guide rod, the guide rod slides with the guide rod seat via the track groove, and when the two guide rods slide synchronously to the farthest position in front of the guide rod seat, the limiting part cooperates with the guide rod seat to limit the position.

[0017] Preferably, the guide rod seat is divided into two half plates, an upper half and an lower half plate, and track grooves of the same shape and size are provided on the facing surfaces of the two half plates. After the two half plates are aligned, the guide rod is clamped therein, and the two half plates are fixed by screws; the guide rod clamped in the track groove by the two half plates is more stable when sliding and will not deflect.

[0018] Preferably, the rear end of the guide rod seat protrudes backward to form a collision block for colliding with the limiting part; while the collision block limits the limiting part, it can prevent the limiting part from directly colliding with the guide rod seat, so as to achieve the effect of buffering and shock absorption.

[0019] Preferably, the distance between the two guide rods is 1.8 cm-4 cm.

[0020] A chair is further provided, comprising a footrest pull-out adjustment mechanism and a seat, wherein a guide rod seat is fixedly connected to the middle position of the left-right direction of the bottom surface of the seat, and in the front-rear direction of the seat, the guide rod seat is located close to the center position of the seat.

[0021] The principle and beneficial effects of the utility model using the above technical solution are:

[0022] The utility model provides a footrest pull-out rod, comprising two guide rods arranged in parallel at an interval, at least one of which is bent at the tail to form a limiting portion, so that the guide rod itself has a limiting function, and there is no need to additionally set up a limiting structure, thus eliminating the step of installing the limiting structure and improving assembly efficiency.

[0023] Furthermore, by slidably connecting the two guide rods to the guide rod seat of the footrest pull-out adjustment mechanism, when the guide rod slides forward to the farthest position, it can form a limit by relying on its own limiting part and the guide rod seat.

[0024] Furthermore, the footrest pull-out adjustment mechanism is installed in the middle position of the left and right directions of the bottom surface of the seat. When the guide rod slides forward to the farthest position and limits the position, the footrest pad connected to the front end of the guide rod remains stable, which is convenient for the footrest of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall structure of the pull rod;

[0026] Figure 2 The exploded view of the guide rod and guide rod seat;

[0027] Figure 3 This is a partial enlarged view of the collision block of the lower half of the plate;

[0028] Figure 4 This is a side view of the footrest in fully folded state;

[0029] Figure 5 This is a side view of the footrest in fully extended state;

[0030] Figure 6 This is a schematic diagram of the guide rod described in Example 2;

[0031] Figure 7 A schematic diagram of the guide rod splitting described in Example 3;

[0032] Figure 8 This is a schematic diagram of the guide rod described in Example 4.

[0033] The reference numerals of the figures are: 1—guide rod seat, 2—guide rod, 2-1—split round guide rod, 2-2—split square guide rod, 2-3—integrated square guide rod, 3—connecting seat, 4—footrest pad, 5—half plate, 6—track groove, 7—limiting portion, 8—collision block. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] The specific implementation methods of the utility model and its different embodiments are as follows:

[0038] Example 1: Figure 1-5 As shown, a footrest pull-out rod of a chair comprises two guide rods 2 arranged in parallel with each other at an interval, and the interval between the two guide rods 2 is 1.8cm-4cm; the guide rod 2 is a cylindrical solid rod, and the diameter of the guide rod 2 is 6mm-10mm, wherein at least one guide rod 2 is bent inward at the tail to form a limiting portion 7.

[0039] Furthermore, the pull-out rod is a whole rod that is bent in the middle to form two parallel and spaced guide rods 2, and the two guide rods 2 are bent in the middle to form the limiting portion 7; a U-shaped structure is formed between the two guide rods 2 and the limiting portion 7; the limiting portion 7 is arc-shaped or straight-shaped; the pull-out rod formed by bending a whole rod has a limiting function. This design can omit the limiting cover that needs to be installed additionally, thereby reducing the number of installation steps.

[0040] A footrest pull-out adjustment mechanism is further provided, comprising a footrest pull-out rod and a guide rod seat 1 of the above-mentioned chair, the front end of the guide rod 2 is connected to the footrest via a connecting seat, the guide rod seat 1 is provided with a track groove 6 for slidingly cooperating with the guide rod 2, the guide rod 2 is slidingly cooperating with the guide rod seat 1 via the track groove 6, and when the two guide rods 2 slide synchronously to the farthest position in front of the guide rod seat 1, the limiting portion 7 cooperates with the guide rod seat 1 to limit the position.

[0041] Furthermore, the guide rod seat 1 is divided into two upper and lower half plates 5, and the two half plates 5 are provided with track grooves 6 of the same shape and size on the facing surfaces. After the two half plates 5 are matched, the guide rod 2 is clamped therein, and the two half plates 5 are fixed by screws; the guide rod 2 clamped in the track groove 6 by the two half plates 5 is more stable when sliding and will not deflect.

[0042] Furthermore, in order to prevent the limiting portion 7 from having a large impact with the guide rod seat 1 when limiting, the rear end of the guide rod seat 1 protrudes backward to form a collision block 8 for colliding with the limiting portion 7; while the collision block 8 forms a limit for the limiting portion 7, it can prevent the limiting portion 7 from directly colliding with the guide rod seat 1, so as to achieve the effect of buffering and shock absorption.

[0043] A chair is further provided, including a footrest pull-out adjustment mechanism and a seat, wherein a guide rod seat 1 is fixedly connected to the middle position of the left-right direction of the bottom surface of the seat, and in the front-rear direction of the seat, the guide rod seat 1 is located close to the center position of the seat; a connecting seat 3 is installed at the front end of the guide rod seat 1, and a footrest pad 4 is installed on the connecting seat 3. When the guide rod 1 slides forward to the farthest position and is limited, the limiting portion 7 abuts against the bumper 8 on the guide rod seat 1, so that the footrest pad 4 connected to the front end of the guide rod 1 remains stable, which is convenient for the footrest of the chair.

[0044] Example 2: Figure 6 As shown, the difference between this embodiment and the above embodiment is that the two guide rods 2 are formed in different ways; the two guide rods 2 are bent towards each other at the tail to form the limiting portion 7, and the two limiting portions 7 are not connected or are fixedly connected by welding; specifically, the two guide rods 2 can be first divided into two split circular guide rods 2-1, each split circular guide rod 2-1 is bent on the inner side of the tail end to form two opposite ends, and there is a gap between the two ends, which can be filled by welding or not; the presence or absence of the gap does not affect the abutment and limiting of the limiting portion 7 and the collision block 8, so the pull rod with a changed forming method can also achieve the same effect as the above embodiment.

[0045] Example 3: Figure 7 As shown, the difference between this embodiment and the above embodiment is that the guide rod 2 is a solid elliptical rod or a square rod, and the maximum width or maximum height of the cross section of the guide rod 2 does not exceed 10 mm; this embodiment takes the guide rod 2 as a square rod for illustration; specifically, the two guide rods 2 can be first divided into two split square guide rods 2-2, each split square guide rod 2-2 is bent on the inner side of the tail end to form two opposite ends; when the guide rod 2 is a square rod, the cross-sectional shape of the guide rod 2 is a rectangle, and the track groove 4 of the guide rod seat 1 is also a rectangle. The change of the cross-sectional shape does not affect the abutment and limiting of the limit portion 7 and the collision block 8, so the pull rod with a changed cross-sectional shape can also achieve the same effect as the above embodiment.

[0046] Example 4: Figure 8As shown, the difference between this embodiment and the above embodiment is that, in this embodiment, the two guide rods 2 are formed by bending or molding the pull rod as an integrated square guide rod 2-3 in the middle, and the limiting portion 7 is integrally formed with the two guide rods 2. In use, the pull rod can achieve the same effect as the above embodiment.

[0047] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A footrest pull-out rod for a chair, characterized in that: The pull rod comprises two guide rods (2) arranged in parallel and spaced apart from each other, and at least one of the guide rods (2) is bent at the tail to form a limiting portion (7).

2. The footrest pull-out rod of a chair according to claim 1, characterized in that: The pull-out rod is formed by bending a whole rod in the middle, and the bending position in the middle of the whole rod forms the limiting portion (7).

3. The footrest pull-out rod of a chair according to claim 2, characterized in that: The limiting portion (7) is arc-shaped or straight-shaped.

4. The footrest pull-out rod of a chair according to claim 1, characterized in that: The two guide rods (2) are bent towards each other at their tail ends to form the limiting portion (7), and the two limiting portions (7) are not connected or are fixedly connected by welding.

5. The footrest pull-out rod of a chair according to claim 1, characterized in that: The guide rod (2) is a cylindrical solid rod, and the diameter of the guide rod is 6 mm-10 mm.

6. The footrest pull-out rod of a chair according to claim 5, characterized in that: The guide rod (2) is a solid elliptical rod or a square rod, and the maximum width or maximum height of the guide rod cross section does not exceed 10 mm.

7. A footrest pull-out adjustment mechanism, characterized in that: The chair comprises a footrest pull-out rod and a guide rod seat (1) as claimed in claim 1, wherein the front end of the guide rod (2) is connected to the footrest (4) via a connecting seat (3), and the guide rod seat (1) is provided with a track groove (6) for slidingly cooperating with the guide rod (2), and the guide rod (2) is slidably cooperating with the guide rod seat (1) via the track groove (6), and when the two guide rods slide synchronously to the farthest position in front of the guide rod seat (1), the limiting part (7) cooperates with the guide rod seat (1) to limit the position.

8. A footrest pull-out adjustment mechanism according to claim 7, characterized in that: The guide rod seat (1) is divided into two upper and lower half plates (5), and the two half plates (5) are provided with track grooves (6) of the same shape and size on the facing surfaces. After the two half plates (5) are matched, the guide rod (2) is clamped therein, and the two half plates (5) are fixed by screws.

9. The footrest pull-out adjustment mechanism according to claim 7, characterized in that: A collision block (8) protrudes backwards from the rear end of the guide rod seat (1) and is used to collide with the limiting portion (7).

10. The footrest pull-out adjustment mechanism according to claim 7, characterized in that: The distance between the two guide rods (2) is 1.8 cm to 4 cm.

11. A seat, characterized in that: It comprises a footrest pull-out adjustment mechanism and a seat as claimed in claim 7, wherein the guide rod seat (1) is fixedly connected to the middle position of the left-right direction of the bottom surface of the seat, and in the front-back direction of the seat, the guide rod seat (1) is located close to the center position of the seat.

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