Inclination adjusting mechanism for chair back and noon break chair

Abstract

The utility model belongs to the field of noon break chairs, and provides an inclination adjusting mechanism for a chair back and a noon break chair, the inclination adjusting mechanism comprises a chair frame, the chair frame, the chair back and a chair back rotating shaft, the chair back rotating shaft is provided with a rotation assisting mechanism and a positioning mechanism, and the rotation assisting mechanism comprises auxiliary bolts which are respectively arranged on two sides of the end part of the chair back rotating shaft and can rotate; the auxiliary bolt and the chair back rotating shaft are arranged in parallel, a second supporting plate is arranged on the chair frame, and a guide hole for the auxiliary bolt to move is formed in the second supporting plate. By arranging the two auxiliary bolts and arranging the two auxiliary bolts on the two sides of the rotating shaft bolt respectively, three-point connection is formed between the chair back and the chair frame, so that the connection effect can be better improved, the connection stability is effectively improved, and the problem that in the prior art, due to the fact that only one rotating shaft is arranged between the chair back and the chair frame for supporting, the chair back and the chair frame cannot be supported is solved. The connection stability is poor, so that the connection of the chair back and the chair frame is loose as a whole.

Description

Technical Field

[0001] This utility model belongs to the field of nap chairs, and in particular relates to a backrest tilting mechanism and a nap chair. Background Technology

[0002] The nap chair is mainly used for lunch breaks, short rests or naps. It provides comfortable support through ergonomic design and helps users quickly recover their energy.

[0003] Currently, to improve the performance of nap chairs, many feature adjustable backrests and pull-out leg supports at the bottom of the seat. The backrest is rotatably mounted on the frame, as in the nap chair disclosed in application number CN202322847181.9. However, because the backrest and frame are supported by only one pivot, the connection stability and reliability are poor, resulting in a relatively loose connection. This leads to certain deficiencies in comfort and safety when using the chair while lying down. Utility Model Content

[0004] This utility model addresses the technical problems existing in the aforementioned nap chairs by proposing a backrest tilting mechanism and a nap chair that are reasonably designed, have strong connection stability and reliability, provide high comfort and safety, and are highly practical.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a chair back tilting mechanism and a nap chair, including a chair frame, a chair back that can be adjusted for tilt angle on the chair frame, a chair back pivot between the chair back and the chair frame, a rotation auxiliary mechanism and a positioning mechanism on the chair back pivot, the rotation auxiliary mechanism including rotatable auxiliary bolts respectively provided on both sides of the end of the chair back pivot, the auxiliary bolts being arranged parallel to the chair back pivot, a second support plate provided on the chair frame, and a guide hole provided on the second support plate for the movement of the auxiliary bolts.

[0006] Preferably, the auxiliary bolt abuts against the side of the guide hole away from the backrest pivot and does not abut against the side of the guide hole close to the backrest pivot.

[0007] Preferably, a first mounting plate is provided on the backrest pivot near its end for use with an auxiliary bolt. The first mounting plate is provided with a first bolt hole through which one end of the auxiliary bolt passes. An anti-loosening nut is provided at the end of the auxiliary bolt after one end passes through the first bolt hole.

[0008] Preferably, a second mounting plate is provided on the backrest pivot near the second support plate, and the second mounting plate is provided with a second bolt hole for the auxiliary bolt to pass through.

[0009] Preferably, both ends of the chair back pivot are provided with pivot bolts, one of which is engaged with the second support plate, and the other is engaged with the first support plate provided on the chair frame.

[0010] Preferably, the chair back pivot is provided with a torsion spring for driving the chair back to return to its original position.

[0011] Preferably, the positioning mechanism includes a pin for preventing the backrest pivot from rotating freely, the second mounting plate is provided with a pin hole that mates with the pin, and the second support plate is provided with a hole for the pin to move.

[0012] Preferably, one end of the pin is fitted with a thrust seat, the thrust seat is provided with a hole for the pin to rotate and move, the thrust seat is provided on the second support plate, one end of the pin passes through the thrust seat and a handle is provided at the end of the pin.

[0013] Preferably, a return spring is fitted on the pin shaft to drive the pin shaft to return to its original position, a lever shaft is provided on the thrust seat, a spiral climbing track is provided on the lever shaft, and a boss is provided on the lever to cooperate with the climbing track.

[0014] A nap chair, including the aforementioned chair back tilting mechanism.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] This utility model provides a chair back tilting mechanism and a nap chair. By setting two auxiliary bolts, one on each side of the pivot bolt, a three-point connection is formed between the chair back and the chair frame. This improves the connection effect and effectively enhances the connection stability. This utility model solves the problem in the prior art where the connection between the chair back and the chair frame is only supported by a single pivot, resulting in poor connection stability and a loose overall connection between the chair back and the chair frame. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of a chair back tilting mechanism and a nap chair provided for an embodiment;

[0019] Figure 2 for Figure 1An enlarged schematic diagram of a chair back tilting mechanism at position A;

[0020] Figure 3 A schematic diagram of a portion of the positioning mechanism provided in the embodiment on the nap chair;

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of the B-structure;

[0022] Figure 5 A bottom view of a partial view of a chair back tilting mechanism provided in an embodiment of a nap chair;

[0023] Figure 6 for Figure 5 A cross-sectional view of a chair back tilting mechanism on a nap chair;

[0024] Figure 7 A schematic diagram of a partial application of a backrest tilting mechanism in a nap chair, provided as an embodiment;

[0025] Figure 8 for Figure 7 A magnified view of a chair back tilting mechanism at position C;

[0026] Figure 9 A perspective view of a nap chair provided for an embodiment;

[0027] Figure 10 A perspective view of the lever provided for an embodiment;

[0028] In the above figures: 1. Chair frame; 2. Chair back; 3. Chair back pivot; 4. Rotation auxiliary mechanism; 41. First support plate; 42. Second support plate; 43. Guide hole; 44. First mounting plate; 45. Second mounting plate; 46. Auxiliary bolt; 47. Pivot bolt; 48. Torsion spring; 5. Positioning mechanism; 51. Thrust seat; 52. Climbing rail; 53. Wrench pivot; 54. Pin; 55. Return spring; 56. Guide cylinder; 57. Boss; 58. Wrench; 6. Lunch break chair. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0030] Many specific details are set forth in the following description in order to provide 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 present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] Examples, such as Figures 1-10 As shown, this utility model provides a chair back tilting mechanism and a nap chair. The nap chair 6 adopts a chair back tilting mechanism. Specifically, the chair back tilting mechanism includes a chair frame 1, on which a chair back 2 capable of adjusting the tilt angle is provided. A chair back pivot 3 is provided between the chair back 2 and the chair frame 1. A rotation auxiliary mechanism 4 and a positioning mechanism 5 are provided on the chair back pivot 3. The rotation auxiliary mechanism 4 includes rotatable auxiliary bolts 46 respectively provided on both sides of the end of the chair back pivot 3. The auxiliary bolts 46 are arranged parallel to the chair back pivot 3. A second support plate 42 is provided on the chair frame 1. The second support plate 42 is provided with guide holes 43 for the movement of the auxiliary bolts 46.

[0032] In this device, the guide hole 43 is arc-shaped, and the arc trajectory serves as the moving path of the auxiliary bolt 46 as it rotates with the chair back 2. If the angle of the chair back 2 is passively adjusted, the chair back pivot 3 rotates, causing the auxiliary bolt 46 to move within the guide hole 43. In this way, the rotation center of the chair back pivot 3 and the chair frame 1 serves as a support line. Furthermore, this invention adds two support lines by setting two auxiliary bolts 46, which are respectively positioned on both sides of the pivot bolt 47. This forms a three-point connection between the chair back 2 and the chair frame 1, thus improving the connection effect and effectively enhancing connection stability. Therefore, this three-point support method solves the problem of poor connection stability and a loose overall connection between the chair back 2 and the chair frame 1 due to only one pivot support, thereby ensuring the stability and safety of the chair back 2 during use.

[0033] To improve the fit between the guide hole 43 and the auxiliary bolt 46, the outer circumference of the auxiliary bolt 46 provided in this invention abuts against the side of the guide hole 43 away from the backrest pivot 3, and does not abut against the side of the guide hole 43 close to the backrest pivot 3. The two ends of the guide hole 43 are the two limiting endpoints of the auxiliary bolt 46. When the backrest 2 is in its normal position, it abuts against one end of the guide hole 43. As the backrest 2 gradually flattens, it moves towards the other end of the guide hole 43 until the auxiliary bolt 46 completely switches from one end of the guide hole 43 to the other end.

[0034] A first mounting plate 44 is provided near its end on the chair back pivot 3 to cooperate with the auxiliary bolt 46. The auxiliary bolt 46 is a plug bolt. The first mounting plate 44 has a first bolt hole through which one end of the auxiliary bolt 46 passes. An anti-loosening nut is provided at the end of the auxiliary bolt 46, and the anti-loosening nut does not abut against the first mounting plate 44. The first mounting plate 44 can rotate with the chair back 2, and the rotation process is coordinated with the auxiliary bolt 46 without affecting the alignment of the auxiliary bolt 46 with the guide hole 43, thereby ensuring the stability of the auxiliary bolt 46's rotation.

[0035] Furthermore, the chair back pivot 3 provided by this utility model is provided with a second mounting plate 45 near the second support plate 42, and the second mounting plate 45 is provided with a second bolt hole for the auxiliary bolt 46 to pass through. By providing a second mounting plate 45 parallel to the first mounting plate 44, the auxiliary bolt 46 can be provided with multi-point axial support, thereby ensuring that the auxiliary bolt 46 and the chair back pivot 3 always maintain good parallelism, improving the rotation performance of the chair back 2, and reducing the shear load on the auxiliary bolt 46, which is conducive to ensuring that the product has a longer actual service life.

[0036] To improve the performance of the nap chair, this invention provides rotating shaft bolts 47 at both ends of the backrest rotating shaft 3. One rotating shaft bolt 47 mates with the second support plate 42, and the other rotating shaft bolt 47 mates with the first support plate 41 mounted on the chair frame 1. Both the first support plate 41 and the second support plate 42 are provided with hole structures to accommodate one end of the rotating bolt passing through. A nut, which is also a plug nut, is fixedly installed inside the backrest rotating shaft 3 and is threaded to one end of the rotating shaft bolt 47. The optical axis section of the nut corresponds to the first support plate 41 or the second support plate 42.

[0037] The chair back pivot 3 is provided with a torsion spring 48 for driving the chair back 2 to reset. One end of the torsion spring 48 is connected to the first support plate 41, and the other end is connected to the chair back pivot 3. After being passively rotated and deformed, the torsion spring can generate a tendency to reset, which is used to drive the chair back pivot 3 to reset, thereby improving the user experience of the nap chair.

[0038] To improve the positioning effect of the positioning mechanism 5 on the nap chair, the positioning mechanism 5 provided by this utility model includes a pin 54 to prevent the backrest shaft 3 from rotating freely. A pin hole is provided on the second mounting plate 45 to cooperate with the pin 54, and a hole is provided on the second support plate 42 for the pin 54 to move. When the pin 54 is inserted into the pin hole, the backrest shaft 3 cannot rotate and remains relatively stationary with respect to the chair frame 1. A guide cylinder 56 is fixedly installed in the hole on the second support plate 42 to assist the movement of the pin 54, providing guidance and drag reduction effects.

[0039] Furthermore, a thrust seat 51 is fitted onto one end of the pin 54. The thrust seat 51 has a hole for the pin 54 to rotate and move. The thrust seat 51 is mounted on the second support plate 42. One end of the pin 54 passes through the thrust seat 51, and a lever 58 is provided at the end of the pin 54. The lever 58 is used to drive the pin 54 to rotate and move, thereby realizing the separation and insertion of the pin 54 from the pin hole.

[0040] Furthermore, the present invention provides a return spring 55 that can drive the pin 54 to reset, and a lever shaft 53 is provided on the thrust seat 51. The lever shaft 53 is provided with a spiral climbing track 52, and the lever 58 is provided with a boss 57 that cooperates with the climbing track 52. The rotation of the lever 58 drives the boss 57 to move on the climbing track 52, thereby causing the lever 58 to move along the axis of the pin 54, and thus driving the pin 54 to move, which can be used to release the connection between the pin 54 and the pin hole.

[0041] When the chair needs to be adjusted to a reclining position, turning the lever 58 causes the pin 54 to separate from the second mounting plate 45. At this time, the user presses the backrest 2 backward, and the backrest 2 can rotate. The torsion spring stores energy, thereby realizing the change of reclining position. When the chair needs to be adjusted to a sitting position, the user sits up, and the backrest 2 rotates to its original position under the action of the torsion spring 48. At this time, the lever 58 is released, and the return spring 55 drives the pin 54 to insert into the pin hole, thereby locking the backrest 2 and preventing rotation.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A chair back tilting mechanism, comprising a chair frame, wherein a chair back capable of adjusting the tilt angle is disposed on the chair frame, and a chair back pivot is disposed between the chair back and the chair frame, characterized in that, The chair back pivot is provided with a rotation auxiliary mechanism and a positioning mechanism. The rotation auxiliary mechanism includes rotatable auxiliary bolts respectively provided on both sides of the end of the chair back pivot. The auxiliary bolts are arranged parallel to the chair back pivot. The chair frame is provided with a second support plate, and the second support plate is provided with guide holes for the auxiliary bolts to move.

2. The chair back tilting mechanism according to claim 1, characterized in that, The auxiliary bolt abuts against the side of the guide hole away from the backrest pivot, and does not abut against the side of the guide hole close to the backrest pivot.

3. A chair back tilting mechanism according to claim 1 or 2, characterized in that, A first mounting plate is provided near the end of the chair back pivot for use with an auxiliary bolt. The first mounting plate is provided with a first bolt hole through which one end of the auxiliary bolt passes. An anti-loosening nut is provided at the end of the auxiliary bolt.

4. The chair back tilting mechanism according to claim 3, characterized in that, A second mounting plate is provided on the backrest pivot near the second support plate, and the second mounting plate is provided with a second bolt hole for the auxiliary bolt to pass through.

5. A chair back tilting mechanism according to claim 4, characterized in that, Both ends of the chair back pivot are provided with pivot bolts, one of which is engaged with the second support plate, and the other is engaged with the first support plate set on the chair frame.

6. A chair back tilting mechanism according to claim 4 or 5, characterized in that, The chair back pivot is equipped with a torsion spring for driving the chair back to return to its original position.

7. A chair back tilting mechanism according to claim 6, characterized in that, The positioning mechanism includes a pin for preventing the backrest pivot from rotating freely, a pin hole for engaging with the pin on the second mounting plate, and a hole for the pin to move on the second support plate, with a guide cylinder inside the hole.

8. A chair back tilting mechanism according to claim 7, characterized in that, One end of the pin is fitted with a thrust seat, which has a hole for the pin to rotate and move. The thrust seat is mounted on the second support plate. One end of the pin passes through the thrust seat and a lever is provided at the end of the pin.

9. A chair back tilting mechanism according to claim 8, characterized in that, A return spring capable of driving the pin to reset is sleeved on the pin shaft. A lever shaft is provided on the thrust seat. A spiral climbing track is provided on the lever shaft. A boss that cooperates with the climbing track is provided on the lever.

10. A nap chair, characterized in that, The invention includes a chair back tilting mechanism as described in any one of claims 1-9.

Images