Angle-adjustable armrest for auditorium chair

Abstract

The utility model relates to the technical field of armrests, and discloses an angle-adjustable armrest for an auditorium chair, which comprises a base, a chair seat and a chair back, standing feet are connected between the chair back and two sides of the base, supporting rods are connected to the top ends of the standing feet on two sides of the chair back, connecting blocks are slidably connected to the supporting rods, and the connecting blocks are connected to the chair back. A handrail frame is hinged to the top end of the connecting block, a positioning assembly capable of positioning the angle of the handrail frame is connected to the handrail frame, and a handrail is arranged at the top end of the handrail frame. Compared with the prior art, the armrest has the advantages that the angle of the armrest is convenient to adjust, and the practicability of the armrest is improved.

Description

Technical Field

[0001] This utility model relates to the field of armrest technology, specifically to an adjustable armrest for auditorium chairs. Background Technology

[0002] The structure of an auditorium chair mainly consists of five parts: seat, backrest, armrests, writing board, and legs. Among them, the armrests are made of metal frames and wood, plastic, or other materials, and are the basic supporting components of the entire chair. Since the armrests are fixedly connected to the backrest and cannot be adjusted, nor can their angle be adjusted as needed, the practicality of the armrests is reduced. Utility Model Content

[0003] I. Technical problems to be solved

[0004] The technical problem this invention aims to solve is that the armrests are fixedly connected to the chair back, making them non-adjustable and their angle cannot be adjusted, thus reducing the practicality of the armrests.

[0005] II. Technical Solution

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: an adjustable armrest for an auditorium chair, including a base, a seat and a backrest, with legs connected between the backrest and the two sides of the base, and support rods connected to the top of the legs on both sides of the backrest, with connecting blocks slidably connected to the support rods, and armrests hinged to the top of the connecting blocks, with positioning components for positioning the armrest angle connected to the armrests, and armrests at the top of the armrests.

[0007] Furthermore, the positioning component includes an incomplete fixed tooth connected to the top of the connecting block, the top of the connecting block is hinged to the support frame via a hinge shaft, the support frame is slidably connected with a limiting tooth that meshes with a fixed gear, and the support frame is connected with a limiting component that can lock the limiting tooth.

[0008] Furthermore, the limiting component includes a drive cavity disposed within the armrest, a U-shaped rod slidably disposed within the drive cavity, a drive assembly capable of driving the U-shaped rod disposed inside the drive cavity, and slide rods disposed at both ends of the U-shaped rod, with one end of the slide rod slidably penetrating the drive cavity and connecting to the limiting tooth, and a first spring disposed between the other end of the slide rod and the drive cavity.

[0009] Furthermore, the drive assembly includes a drive shaft hinged to the inside of the U-shaped rod by a torsion spring. The other end of the drive shaft rotates through the drive cavity and is connected to a pressure plate at its end. Wing plates are respectively connected to both sides of the drive shaft, and the distance between the ends of the relative wing plates is consistent with the distance between the interior parts of the U-shaped rod.

[0010] Furthermore, the drive cavity is provided with a clearance groove at one end near the limiting tooth, and the clearance groove slides in cooperation with the limiting tooth.

[0011] Furthermore, the top of the handrail is provided with a sliding groove, and a sliding sleeve is provided in the sliding groove to slide with the sliding groove. The top of the sliding groove is provided with a through hole, and several limiting grooves are evenly arranged on both sides of the bottom of the sliding groove. A limiting block is slidably provided in the sliding sleeve. The limiting block can slide downward through the sliding sleeve and cooperate with the limiting groove. A connecting rod is provided at the top of the limiting block. The connecting rod slides through the sliding sleeve and the through hole and is connected to the handrail at the top. A spring is sleeved on the connecting rod. The spring is connected between the sliding sleeve and the limiting block.

[0012] III. Beneficial Effects

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] The sliding arrangement of the chair back, support rod, and connecting block facilitates the adjustment of the height of the connecting block and armrest; while the hinged connection between the armrest and the connecting block and the matching arrangement of the positioning components facilitate the adjustment of the armrest angle as needed, improving the practicality of the device. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an adjustable armrest for an auditorium chair according to this utility model.

[0016] Figure 2 This is a side sectional view of an adjustable armrest for an auditorium chair according to the present invention.

[0017] Figure 3 yes Figure 2 A magnified structural diagram of A in the diagram.

[0018] Figure 4 yes Figure 2 A magnified structural diagram of B in the diagram.

[0019] As shown in the figure: 1. Base, 2. Standing foot, 3. Support rod, 4. Connecting block, 5. Handrail, 6. Handrail, 7. Fixing tooth, 8. Limiting tooth, 9. Drive cavity, 10. U-shaped rod, 11. Sliding rod, 12. First spring, 13. Drive shaft, 14. Wing plate, 15. Clearance groove, 16. Sliding groove, 17. Sliding sleeve, 18. Limiting groove, 19. Limiting block, 20. Connecting rod, 21. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] In order to adjust the tilt angle of the handrail 6 to improve the practicality of the device, combined with the attached... Figure 1 , Figure 2 and Figure 3 An adjustable armrest for an auditorium chair includes a base 1, a seat, and a backrest. Legs 2 are connected between the backrest and both sides of the base 1. Support rods 3 are connected to the top of the legs 2 on both sides of the backrest. Connecting blocks 4 are slidably connected to the support rods 3. Positioning pins are connected to the support rods 3 via elastic elements. Several limiting holes are provided on the connecting blocks 4, and the limiting holes and positioning pins can cooperate to achieve positioning. An armrest 5 is hinged to the top of the connecting blocks 4. An armrest 6 is provided at the top of the armrest 5. A positioning component for positioning the angle of the armrest 5 is connected to the armrest 5. The positioning component includes an incomplete fixing tooth 7 connected to the top of the connecting blocks 4. The top of the connecting blocks 4 is hinged to the armrest 5 via a hinge shaft. A limiting tooth 8 that meshes with the fixing tooth 7 is slidably connected inside the armrest 5.

[0023] In order to determine the tilt angle of the armrest 6 in order to provide stable support for the arm, combined with the attached... Figure 3 The handrail 5 is equipped with a limiting component that can lock the limiting tooth 8. The limiting component includes a drive cavity 9 located in the handrail 5. A U-shaped rod 10 is slidably arranged in the drive cavity 9. The drive cavity 9 has a drive component inside the U-shaped rod 10 that can drive the U-shaped rod 10. The drive component includes a drive shaft 13 hinged to the inside of the U-shaped rod 10 by a torsion spring. The other end of the drive shaft 13 rotatably passes through the drive cavity 9 and is connected to a pressure plate at its end. Wing plates 14 are respectively connected to both sides of the drive shaft 13. The distance between the ends of the wing plates 14 is the same as the distance between the inside of the U-shaped rod 10. Slide rods 11 are respectively provided at both ends of the U-shaped rod 10. The other end of one slide rod 11 slides through the drive cavity 9 and is connected to the limiting tooth 8. A first spring 12 is provided between the other end of the slide rod 11 and the drive cavity 9. An avoidance groove 15 is provided at the end of the drive cavity 9 near the limiting tooth 8. The avoidance groove 15 is slidably engaged with the limiting tooth 8.

[0024] Driven by a torsion spring, the drive shaft 13 drives the U-shaped rod 10 to overcome the action of the first spring 12 and slide the slide rod 11 out, so that the limiting tooth 8 meshes with the fixed tooth 7. Since the distance between the ends of the wing plates 14 is consistent with the distance between the inside of the U-shaped rod 10, the two wing plates 14 and the slide rod 11 are horizontal and abut against the inner wall of the U-shaped rod 10. The wing plates 14 and the slide rod 11 are collinear to form a "dead point", thereby realizing the positioning of the limiting tooth 8. When it is necessary to adjust the angle of the armrest 5, the pressure plate drives the wing plate 14 to rotate through the drive shaft 13. When the wing plate 14 drives the U-shaped rod 10 to a vertical state, the slide rod 11 drives the U-shaped rod 10 through the first spring 12 to move the limiting tooth 8 along the axial direction of the slide rod 11. At this time, the limiting tooth 8 no longer meshes with the fixed tooth 7, and the angle of the armrest 5 can be adjusted at will.

[0025] Example 2

[0026] Based on Embodiment 1, in order to adjust the extension length of the handrail 6 to meet usage needs and improve the practicality of the device, in conjunction with the attached... Figure 4 The top of the handrail 5 is connected to a sliding groove 16, and a sliding sleeve 17 is provided in the sliding groove 16 to slide and cooperate with the sliding groove 16. The top of the sliding groove 16 is provided with a through hole, and several limiting grooves 18 are evenly arranged on both sides of the bottom end of the sliding groove 16. A limiting block 19 is slidably provided in the sliding sleeve 17. The limiting block 19 can slide downward through the sliding sleeve 17 and cooperate with the limiting groove 18. A connecting rod 20 is connected to the top of the limiting block 19. The connecting rod 20 slides through the sliding sleeve 17 and the through hole and is connected to the handrail 6 at the top. A spring 21 is sleeved on the connecting rod 20. The spring 21 is connected between the sliding sleeve 17 and the limiting block 19.

[0027] In the natural state of spring 21, the limiting block 19 slides out of the sliding sleeve 17 and engages with the limiting groove 18, thereby facilitating the positioning of the extension length of the handrail 6. When it is necessary to adjust the extension length of the handrail 6, by lifting the handrail 6, the handrail 6 drives the limiting block 19 to slide into the sliding sleeve 17 through the connecting rod 20. At this time, spring 21 is compressed and stored, and then the handrail 6 drives the sliding sleeve 17 to slide along the direction of the sliding groove 16 to adjust the extension length of the handrail 6 to the required length. When the handrail 6 is released, under the reset action of spring 21, the limiting block 19 is driven to engage with the limiting groove 18 again to achieve the positioning of the handrail 6.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An angle-adjustable armrest for a church chair, comprising a base (1), a seat and a back, and a standing foot (2) connected between the back and the two sides of the base (1), characterized in that: a support rod (3) is connected to the top end of the standing foot (2) on the two sides of the back, a connecting block (4) is slidably connected to the support rod (3), a support frame (5) is hingedly connected to the top end of the connecting block (4), a positioning assembly for positioning the angle of the support frame (5) is connected to the support frame (5), and an armrest (6) is provided at the top end of the support frame (5). The positioning assembly comprises an incomplete fixed tooth (7) connected to the top end of the connecting block (4), the connecting block (4) is hingedly connected to the support frame (5) through a hinge shaft, a limiting tooth (8) engaged with the fixed tooth (7) is slidably connected in the support frame (5), and a limiting assembly for locking the limiting tooth (8) is connected in the support frame (5).

2. The angle-adjustable armrest for a theater chair according to claim 1, characterized in that: The limiting assembly comprises a driving cavity (9) provided in the support frame (5), a U-shaped rod (10) is slidably provided in the driving cavity (9), a driving assembly for driving the U-shaped rod (10) is provided on the inner side of the U-shaped rod (10) in the driving cavity (9), sliding rods (11) are provided at the two ends of the U-shaped rod (10), one end of the sliding rod (11) on one side slidably penetrates the driving cavity (9) and is connected with the limiting tooth (8), and a first spring (12) is provided between the other end of the sliding rod (11) on the other side and the driving cavity (9).

3. The angle-adjustable armrest for a theater chair according to claim 2, characterized in that: The driving assembly comprises a driving shaft (13) hingedly connected to the inner side of the U-shaped rod (10) through a torsion spring, the other end of the driving shaft (13) rotatably penetrates the driving cavity (9) and is connected with a pressing plate at the end, wing plates (14) are respectively connected at the two sides of the driving shaft (13), and the spacing between the ends of the wing plates (14) is consistent with the spacing between the inner sides of the U-shaped rod (10).

4. The angle-adjustable armrest for a theater chair according to claim 3, characterized in that: The driving cavity (9) is provided with an avoiding groove (15) close to one end of the limiting tooth (8), and the avoiding groove (15) is slidably matched with the limiting tooth (8).

5. The angle adjustable armrest for auditorium chair according to claim 4, characterized in that: The support frame (5) is provided with a sliding groove (16) at the top end, the sliding groove (16) is provided with a sliding sleeve (17) slidably matched with the sliding groove (16), the sliding groove (16) is provided with a through hole at the top end, a plurality of limiting grooves (18) are arranged at the two sides of the bottom end of the sliding groove (16), a limiting block (19) is slidably provided downward in the sliding sleeve (17), the limiting block (19) can slidably penetrate the sliding sleeve (17) downward and be matched with the limiting grooves (18), a connecting rod (20) is connected at the top end of the limiting block (19), the connecting rod (20) slidably penetrates the sliding sleeve (17) and the through hole and is connected with the armrest (6) at the top end, a spring (21) is sleeved on the connecting rod (20), and the spring (21) is connected between the sliding sleeve (17) and the limiting block (19).

6. The angle adjustable armrest for auditorium chair according to claim 1, characterized in that: ​

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