Self-locking adjustable office chair

Abstract

A self-locking adjusting type office chair comprises a support and an adjusting frame connected to the support in a sliding mode, the adjusting frame is movably connected with a locking piece, the support is provided with a locking strip connected with the locking piece in a clamped mode, and the locking piece moves on the locking strip in the first direction. The support is further provided with a guide rail and a reset rail, wherein the guide rail is located at the end of the locking strip and used for enabling the locking piece to be separated from the locking strip, and the reset rail is communicated with the guide rail and defines the second direction. The locking piece moves alternately in the first direction and the second direction. According to the utility model, through the arrangement of the bracket and the adjusting bracket, the automatic locking and adjusting function of the adjusting bracket is realized, and the adjusting bracket can be quickly reset, so that the office chair has the advantages of high adjusting efficiency, smoothness and long service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of office chairs, and particularly relates to a self-locking adjustable office chair. Background Art

[0002] Office chairs are highly visible whether in commercial offices or home studies. Some of the existing office chairs with headrests have non-adjustable headrests, and the rest basically rely on a single rotating screw to tighten. Not only is the operation of turning the rotating screw cumbersome, but after long-term use of the rotating screw, there will be a phenomenon of slipping and loosening, resulting in the headrest bracket not being able to stay in the set position for a long time, causing inconvenience to users. At the same time, once the rotating screw slips and loosens during use, the headrest will suddenly lose support for the head, posing a safety hazard.

[0003] The document with the authorization announcement number CN219069800U discloses a locking-adjustable office chair headrest guide sleeve device, which includes a movable bracket for connecting with the headrest and a housing for connecting with the office chair. The housing is provided with an inner cavity, and the top of the inner cavity is provided with an opening; the movable bracket includes two vertical bars symmetrically and spaced apart at its lower part, and the two vertical bars are slidably matched with the inner cavity of the housing; at least two first limiting teeth arranged vertically are provided on each of the opposite sides of the two vertical bars; two symmetrically arranged locking members are slidably connected horizontally on the housing; each locking member includes a second limiting tooth and an unlocking button connected to each other, a spring is connected between the two second limiting teeth, and the second limiting tooth is engaged with the first limiting tooth.

[0004] However, this device still has the following problems: Each time the position is adjusted, the unlocking button needs to be turned, and after reaching the appropriate position, the unlocking button needs to be tightened again, which is time-consuming and laborious. Content of the Utility Model

[0005] In view of the above problems, the purpose of the utility model is to provide a self-locking adjustable office chair. Through the setting of the bracket and the adjusting frame, not only the automatic locking and adjusting function of the adjusting frame is realized, but also the adjusting frame can be quickly reset, so that the office chair has the advantages of high adjustment efficiency, smoothness and long service life.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A self-locking adjustable office chair includes a bracket and an adjusting frame slidably connected to the bracket. A locking member is movably connected to the adjusting frame. The bracket has a locking strip that is snap-connected to the locking member. The locking member moves along a first direction on the locking strip. The bracket is further provided with a guiding track located at the end of the locking strip and used to disengage the locking member from the locking strip, and a reset track that communicates with the guiding track and defines a second direction; the locking member moves alternately in the first direction and the second direction.

[0008] As a further preference of the present utility model, control protrusions are provided on the surface of the locking member, and locking tracks distributed in the first direction are provided on the side end of the bracket close to the locking strip. Both ends of the locking track are respectively communicated with the guiding track and the reset track. When the control protrusion contacts the guiding track, the locking member is forced to disengage from the locking strip, and finally the control protrusion enters the reset track from the locking track.

[0009] As a further preference of the present utility model, a protrusion is provided on the bottom surface of the guiding track to prevent the control protrusion from retreating from the reset track into the locking track; the protrusion has an inclined surface connected to the bottom surface of the locking track, and the higher part of the inclined surface is higher than the inner bottom surface of the reset track.

[0010] As a further preference of the present utility model, an opening is further provided on the bottom surface of the guiding track, and the end of the protrusion at the lower part of the inclined surface is fixedly connected to the side wall of the opening.

[0011] As a further preference of the present utility model, an elastic body is provided at the end of the control protrusion in contact with the inclined surface.

[0012] As a further preference of the present utility model, an elastic member is further provided on the adjusting frame to make the locking member tend to move towards the locking strip.

[0013] As a further preference of the present utility model, a sliding groove parallel to the first direction is provided on the adjusting frame, and a sliding block slidably connected to the sliding groove is provided on the adjusting frame.

[0014] In the present utility model, the self-locking adjustable office chair includes a chair back installed with the bracket and a chair headrest installed with the adjusting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 is a schematic connection diagram of a chair headrest and a chair back provided by the present utility model.

[0016] Attached Figure 2 is a three-dimensional structure schematic diagram of the present utility model.

[0017] Attached Figure 3 is a schematic position structure diagram on the bracket of the present utility model.

[0018] Attached Figure 4 is a schematic position structure diagram on the adjusting frame of the present utility model.

[0019] Attached Figure 5 is a partial structure schematic diagram of the present utility model.

[0020] Description of the drawings: Locking member 100, locking bar 110, guiding track 120, reset track 130, control projection 140, locking track 150, projection member 160, opening 170, elastic member 180. Detailed implementation manners

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "set" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Embodiment 1

[0025] This embodiment provides a self-locking adjustable office chair, including a chair back and a chair headrest. Among them, a bracket can be provided on the chair back, and an adjustment frame can be provided on the chair headrest. The adjustment frame is slidably connected to the bracket to realize the position adjustment of the chair headrest.

[0026] It can be understood that the adjustment of the chair headrest can include vertical height adjustment and horizontal telescopic adjustment. A set of adjustment structures is composed of a bracket and an adjustment frame, and a set of adjustment structures can realize the position adjustment in one direction. Therefore, the number and position of the adjustment structures can be designed according to the actual needs of the office chair to achieve the function of multi-angle adjustment. It is worth noting that in addition to the adjustment of the chair headrest proposed in this embodiment, the above-mentioned individual adjustment structures can also be provided at places such as armrests and lumbar supports to realize the adjustment functions at various parts of the office chair and improve the adjustment function of the office chair. The above functions can be designed and implemented by those skilled in the art according to common general knowledge after knowing the individual adjustment structures, so they will not be elaborated here.

[0027] In this embodiment, the specific manner of the single-group adjustment structure is as follows:

[0028] A locking member 100 is movably connected to the adjustment frame. The bracket has a locking bar 110 that is engaged with the locking member 100. The locking member 100 moves along a first direction on the locking bar 110. The bracket is further provided with a guiding track 120 located at the end of the locking bar 110 and used to disengage the locking member 100 from the locking bar 110, and a reset track 130 that communicates with the guiding track 120 and defines a second direction; the locking member 100 moves alternately in the first direction and the second direction.

[0029] It can be unfolded that an elastic member 180 is further provided on the adjustment frame to make the locking member 100 tend to move towards the locking bar 110. The elastic member 180 is preferably a spring. The adjustment frame has a sliding groove parallel to the first direction, and a sliding block slidably connected to the sliding groove is provided on the adjustment frame. The locking member 100 is composed of a tip, a middle part, and a tail. The tail is connected to the adjustment frame through a hinge member. The middle part is detachably connected to the elastic member 180 (the other end of the elastic member 180 is installed on the adjustment frame). The protrusion on the tip can be engaged with any one of the locking positions on the locking bar 110 to complete the locking of the adjustment frame. When the protrusion on the tip can disengage from one locking position and spring into the next locking position under the action of the spring to achieve position adjustment. It should be noted that in this embodiment, it is further preferably that the movement track of the locking member 100 on the locking bar 110 has a directionality (the first direction), which can be achieved by designing the shape of the locking bar 110 (a well-known technology, so it will not be elaborated here). It is difficult for the locking member 100 to complete reverse adjustment to avoid the situation of tooth disengagement. The second direction described in this embodiment is parallel to but opposite in direction to the first direction. After the locking member 100 disengages from the locking bar 110, the locking member 100 moves along the second direction under the guidance of the reset track 130, so that the locking member 100 returns to the starting end of the locking bar 110, thereby realizing the function of re-adjustment.

[0030] As a further preference of this embodiment, a control protrusion 140 is provided on the surface of the locking member 100. A locking track 150 distributed along the first direction is provided on the side end of the bracket close to the locking bar 110. Both ends of the locking track 150 communicate with the guiding track 120 and the reset track 130 respectively. When the control protrusion 140 contacts the guiding track 120, it forces the locking member 100 to disengage from the locking bar 110, and finally the control protrusion 140 enters the reset track 130 from the locking track 150.

[0031] The cooperation of the control protrusion 140 with each track can realize the locking, unlocking, and reset functions of the locking member 100, specifically as follows:

[0032] When locked, the tip protrusion of the locking member 100 is engaged with the locking position on the locking bar 110;

[0033] When unlocking, the locking member 100 is pushed to the end in the first direction, the control protrusion 140 is in pressure contact with the guiding track 120, and under the oblique guiding of the guiding track 120, it overcomes the resistance of the elastic member 180 and enters the reset track 130 from the locking track 150. At this time, the locking member 100 is disengaged from the locking bar 110;

[0034] When resetting, the locking member 100 is pulled in the opposite direction along the second direction. At this time, the locking member 100 is always in a state of being disengaged from the locking bar 110, and the locking member 100 moves to the end in the second direction under the guiding of the reset track 130. The reset track 130 at this end is communicated with the locking track 150. Under the action of the elastic member 180, the locking member 100 has a tendency to move towards the locking bar 110. The control protrusion 140 returns from the reset track 130 to the locking track 150 through the communication part of the two tracks. At this time, the locking member 100 is located at the starting point of the locking bar 110 and is engaged with the locking bar 110.

[0035] Embodiment 2

[0036] This embodiment optimizes the structure on the basis of Embodiment 1, specifically as follows:

[0037] A protrusion 160 for preventing the control protrusion 140 from retracting from the reset track 130 into the locking track 150 is provided on the bottom surface of the guiding track 120. The protrusion 160 has an inclined surface connected to the bottom surface of the locking track 150, and the higher part of the inclined surface is higher than the inner bottom surface of the reset track 130. After the control protrusion 140 enters the reset track 130 along the inclined surface from the locking track 150, due to the height difference between the bottom surface of the reset track 130 and the high part of the inclined surface, the control protrusion 140 is resisted by the high part of the inclined surface and cannot retract.

[0038] As an implementation manner of this embodiment, an opening 170 is further provided on the bottom surface of the guiding track 120, and the end of the protrusion 160 at the lower part of the inclined surface is fixedly connected to the side wall of the opening 170. Such a setting enables the end (free end) of the protrusion 160 different from the side wall connected to the opening 170 to have the function of deforming under force. When the control protrusion 140 moves along the guiding track 120, it forces the side of the protrusion 160 different from the side connected to the opening 170 to approach the opening 170. And when the control protrusion 140 finally passes through the protrusion 160 and enters the reset track 130, the pressure on the free end of the protrusion 160 disappears and it returns to its original state. At this time, the lower end of the control protrusion 140 is lower than the protrusion 160, and the control protrusion 140 cannot retract.

[0039] As another implementation manner of this embodiment, an end portion of the control projection 140 in contact with the inclined surface has an elastomer. When the control projection 140 moves along the guiding track 120, the elastomer is forced to be compressed. And when the control projection 140 finally passes through the projection member 160 and enters the reset track 130, the elastomer loses pressure and returns to its original state, and the lower end of the elastomer is lower than the projection member 160, so that the control projection 140 cannot retreat.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A self-locking adjustable office chair, comprising a bracket and an adjustment frame slidably connected to the bracket, wherein a locking member (100) is movably connected to the adjustment frame, and a locking bar (110) engaged with the locking member (100) is provided on the bracket, and the locking member (100) moves along a first direction on the locking bar (110), characterized in that, The bracket is further provided with a guiding track (120) located at the end of the locking bar (110) and used to disengage the locking member (100) from the locking bar (110), and a reset track (130) communicating with the guiding track (120) and defining a second direction; the locking member (100) moves alternately in the first direction and the second direction.

2. The self-locking adjustable office chair according to claim 1, wherein A control protrusion (140) is arranged on the surface of the locking member (100), and a locking track (150) distributed in the first direction is arranged on the side end of the bracket close to the locking bar (110). The two ends of the locking track (150) communicate with the guiding track (120) and the reset track (130) respectively. When the control protrusion (140) contacts the guiding track (120), it forces the locking member (100) to disengage from the locking bar (110), and finally the control protrusion (140) enters the reset track (130) from the locking track (150).

3. The self-locking adjustable office chair according to claim 2, characterized in that, A protrusion member (160) is arranged on the bottom surface of the guiding track (120) to prevent the control protrusion (140) from retreating from the reset track (130) into the locking track (150); the protrusion member (160) has an inclined surface connected to the bottom surface of the locking track (150), and the higher part of the inclined surface is higher than the inner bottom surface of the reset track (130).

4. The self-locking adjustable office chair according to claim 3, characterized in that, An opening (170) is further arranged on the bottom surface of the guiding track (120), and the end of the protrusion member (160) at the lower part of the inclined surface is fixedly connected to the side wall of the opening (170).

5. The self-locking adjustable office chair according to claim 3, wherein The end of the control protrusion (140) in contact with the inclined surface has an elastic body.

6. The self-locking adjustable office chair according to claim 1, wherein The adjusting frame is further provided with an elastic member (180) that makes the locking member (100) tend to move towards the locking bar (110).

7. A self-locking adjustable office chair according to claim 1, wherein The adjusting frame has a sliding groove parallel to the first direction, and a sliding block slidably connected to the sliding groove is arranged on the adjusting frame.

8. A self-locking adjustable office chair according to any one of claims 1 to 7, characterized in that, It includes a chair backrest on which the bracket is installed, and a chair headrest on which the adjusting frame is installed.

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