An adjustable visitor chair

Abstract

The utility model provides a kind of adjustable visitor chair, including chair body and main body support, main body support includes base support and handrail support, chair body is fixedly installed on handrail support, handrail support is slidably installed on base support by adjusting mechanism, adjusting mechanism is installed inside base support, including transmission gear, transmission gear is rotatably installed on base support, and is connected with adjusting handle, handrail support bottom is provided with extension, tooth slot meshed with transmission gear is provided on extension, L type locking piece is installed below transmission gear, the middle section of locking piece is rotatably installed on base support, one end of locking piece is provided with protruding part, protruding part cooperates with tooth slot, the other end of locking piece: bottom is connected with base support by support spring, top is provided with extension rod, and horizontal bar is installed on extension rod.The utility model is provided with gear rack structure inside base support, appearance is simple and avoids pinching risk, and the height of chair body can be adjusted simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of chair technology and relates to an adjustable guest chair. Background Technology

[0002] Guest chairs are specifically designed for receiving visitors, business negotiations, or social occasions. They are typically placed in offices, meeting rooms, living rooms, hotel lobbies, and other similar locations. Their design balances comfort, aesthetics, and functionality, aiming to provide guests with a pleasant seating experience. This results in guest chairs usually having a one-piece, non-adjustable structure. While this structure ensures overall aesthetics, its fixed height makes it unsuitable for users of different heights or diverse scenarios. Therefore, designing an adjustable guest chair is essential. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an adjustable guest chair.

[0004] The objective of this utility model can be achieved through the following technical solution: An adjustable meeting chair, comprising a chair body and a main support frame, characterized in that the main support frame includes a base support frame and an armrest support frame, the chair body is fixedly mounted on the armrest support frame, the armrest support frame is slidably mounted on the base support frame via an adjustment mechanism, the adjustment mechanism is installed inside the base support frame and includes a transmission gear, the transmission gear is rotatably mounted on the base support frame and connected to an adjustment handle, the bottom of the armrest support frame is provided with an extension portion, the extension portion is provided with a tooth groove that meshes with the transmission gear, an L-shaped locking member is installed below the transmission gear, the middle section of the locking member is rotatably mounted on the base support frame, one end of the locking member is provided with a protrusion portion that cooperates with the tooth groove, the other end of the locking member: the bottom is connected to the base support frame via a support spring, and an extension rod is provided above, with a horizontal bar installed on the extension rod.

[0005] The working principle of this utility model is as follows: In the default state, the protrusion of the locking member engages with the toothed groove, and the main body is fixed under the weight of the armrest bracket itself. When we need to adjust the height of the chair, we rotate the adjustment handle to drive the toothed groove through the transmission gear, causing the armrest bracket to move upward. During this process, the locking member, due to its own shape and in conjunction with the support spring at the other end, is allowed to remain movable during the upward movement of the armrest bracket. When we adjust to the appropriate height, the protrusion of the locking member engages with the toothed groove, and the main body is fixed again under the weight of the armrest bracket itself. When we need to lower the height, we step on the crossbar, causing the locking member to rotate after being stressed at the end, the protrusion disengages from the toothed groove, and the armrest bracket falls to the lowest position after losing support. After that, we can release the crossbar and readjust the height.

[0006] A buffer spring is also installed between the bottom of the handrail bracket and the base bracket.

[0007] The above structure provides cushioning when the handrail support falls after losing support.

[0008] A second buffer spring is fitted onto the extension rod, and the buffer spring is positioned between the crossbar and the base bracket.

[0009] With the above structure, when the horizontal bar is stepped on, it is cushioned by the second buffer spring, which also assists in the reset.

[0010] The transmission gear has sliding grooves at both ends of its rotating shaft, and the transmission gear is slidably mounted in the sliding grooves.

[0011] With the above structure, the sliding groove allows the transmission gear to be pressed against the tooth groove when the adjustment handle moves downward, and to disengage from the gear when the adjustment handle returns to its original position, facilitating continuous and indirect height adjustment.

[0012] The base support has an extension section at the bottom front end.

[0013] The above structure increases stability.

[0014] Compared with existing technologies, this adjustable guest chair has the following advantages: This utility model has a gear and rack structure set inside the base support, which is simple in appearance and avoids the risk of pinching, while enabling the adjustment of the chair height. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the adjustment mechanism in this utility model.

[0017] In the diagram, 1. Chair body; 2. Base support; 3. Armrest support; 4. Transmission gear; 5. Adjustment handle; 6. Extension part; 7. Gear groove; 8. Locking element; 9. Protrusion; 10. Support spring; 11. Extension rod; 12. Crossbar; 13. Buffer spring one; 14. Buffer spring two; 15. Sliding groove; 16. Extension part. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1-2As shown, this adjustable guest chair includes a chair body 1 and a main support frame. The main support frame includes a base support frame 2 and an armrest support frame 3. The chair body 1 is fixedly mounted on the armrest support frame 3. The armrest support frame 3 is slidably mounted on the base support frame 2 through an adjustment mechanism. The adjustment mechanism is installed inside the base support frame 2 and includes a transmission gear 4. The transmission gear 4 is rotatably mounted on the base support frame 2 and connected to an adjustment handle 5. An extension part 6 is provided at the bottom of the armrest support frame 3. A toothed groove 7 that meshes with the transmission gear 4 is provided on the extension part 6. An L-shaped locking member 8 is installed below the transmission gear 4. The middle section of the locking member 8 is rotatably mounted on the base support frame 2. One end of the locking member 8 is provided with a protrusion 9, which cooperates with the toothed groove 7. The other end of the locking member 8: the bottom is connected to the base support frame 2 through a support spring 10, and an extension rod 11 is provided above it. A crossbar 12 is installed on the extension rod 11.

[0020] In this utility model Figure 1 Only the structure of armrest bracket 3 is shown. The armrest bracket 3 has a connecting frame in the middle to connect the two armrests and is also used for the installation of chair body 1.

[0021] In specific embodiments, in order to ensure the clean appearance of the chair, the surfaces of the base support 2, armrest support 3, and crossbar 12 are usually smoothed.

[0022] In this utility model, the base bracket 2 comprises two symmetrical parts. Figure 2 The image shows only one part of the structure. The other part has the same main structure as this part. The difference between the two is whether or not an adjustment handle 5 and a transmission gear 4 are provided. In a specific embodiment, the adjustment handle 5 and the transmission gear 4 are usually provided in one side of the base bracket 2 as the active part, while the other side of the base bracket 2 is equipped with other structures in the adjustment mechanism other than the adjustment handle 5 and the transmission gear 4 as the driven part, so that the synchronous lifting of both sides can be completed.

[0023] A buffer spring 13 is also installed between the bottom of the handrail support 3 and the base support 2.

[0024] In specific embodiments, a support plate is typically installed on top of the buffer spring to increase the force-bearing area.

[0025] A buffer spring 14 is fitted on the extension rod 11, and the buffer spring is located between the crossbar 12 and the base bracket 2.

[0026] The transmission gear 4 has sliding grooves 15 at both ends of its rotating shaft, and the transmission gear 4 is slidably installed in the sliding grooves 15.

[0027] The base bracket 2 has an extension section 16 at the bottom front end.

[0028] The working principle of this utility model is as follows: In the default state, the protrusion 9 of the locking member 8 is engaged in the toothed groove 7, and the main body is fixed under the weight of the armrest support 3 itself. When we need to adjust the height of the chair body 1, we rotate the adjustment handle 5 to drive the toothed groove 7 through the transmission gear 4, so that the armrest support 3 moves upward. During this process, the locking member 8, due to its own shape and in conjunction with the support spring 10 at the other end, is allowed to remain movable during the upward movement of the armrest support 3. When we adjust to the appropriate height, the protrusion 9 of the locking member 8 is engaged in the toothed groove 7, and the main body is fixed again under the weight of the armrest support 3 itself. When we need to lower the height, we step on the crossbar 12, so that the locking member 8 rotates after being stressed at the end, the protrusion 9 disengages from the toothed groove 7, and the armrest support 3 falls to the lowest position after losing support. After that, we can release the crossbar 12 and readjust the height.

[0029] In this invention, the various mechanisms are connected and driven using existing technologies.

[0030] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An adjustable visitor chair comprising a seat (1) and a main body support, characterized in that, The main body support includes a base support (2) and an armrest support (3), the chair body (1) is fixedly installed on the armrest support (3), the armrest support (3) is slidingly installed on the base support (2) through an adjusting mechanism, the adjusting mechanism is installed inside the base support (2) and comprises a transmission gear (4), the transmission gear (4) is rotatably installed on the base support (2) and is connected with an adjusting handle (5), the bottom of the armrest support (3) is provided with an extension part (6), the extension part (6) is provided with a tooth groove (7) engaged with the transmission gear (4), an L-shaped locking piece (8) is installed below the transmission gear (4), the middle section of the locking piece (8) is rotatably installed on the base support (2), one end of the locking piece (8) is provided with a protruding part (9) matched with the tooth groove (7), the other end of the locking piece (8) is connected with the base support (2) through a supporting spring (10) at the bottom and is provided with an extension rod (11) above, the extension rod (11) is installed with a horizontal bar (12).

2. An adjustable visitor chair according to claim 1, wherein, The bottom of the armrest support (3) and the base support (2) are further provided with a buffer spring (13).

3. An adjustable visitor chair according to claim 1, wherein, The extension rod (11) is sleeved with a buffer spring (14) between the horizontal bar (12) and the base support (2).

4. An adjustable visitor chair according to claim 1, wherein, The both ends of the rotating shaft of the transmission gear (4) are provided with sliding grooves (15), and the transmission gear (4) is slidingly installed in the sliding grooves (15).

5. An adjustable visitor chair according to claim 1, wherein, The bottom of the base support (2) is provided with an extension part (16) at the front end.

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