A guide groove reciprocating telescopic adjusting mechanism and an office chair

Abstract

The utility model discloses a guide groove reciprocating telescopic adjusting mechanism and office chair. The utility model discloses a guide groove reciprocating telescopic adjusting mechanism, when the sliding part is relative fixed part sliding adjustment gear, will drive the straight hook of torsional spring along the first guide groove removes, in this process, the torsional spring will continue to exert the downward force to the lock gear and drive lock gear tight pressure the step, when lock gear removes before next step, will fall from last step, impact fixed part and send the impact sound, thereby provides lock experience feeling for user when the gear adjustment. In addition, when the sliding part slides to the limit position and reversely pushes the sliding part, the straight hook enters the second guide groove under the elastic force of torsional spring, and along the second guide groove moves to the second guide groove intermediate position with the reverse sliding of the sliding part, at this moment, lock gear is driven with the step and is combined to realize lock, can avoid the accidental reset of the sliding part.

Description

Technical Field

[0001] This utility model relates to the field of office furniture technology, and in particular to a guide groove reciprocating telescopic adjustment mechanism and an office chair. Background Technology

[0002] Some existing office chairs have a lumbar support and an adjustment mechanism in the backrest, allowing the lumbar support position to be adjusted by changing the positions of the adjustment mechanism. However, the existing lumbar support adjustment mechanism lacks a locking mechanism when adjusting the position. In addition, when the lumbar support adjustment mechanism is adjusted to its limit, it can be easily reset by pushing it in the opposite direction, which can easily lead to accidental reset.

[0003] In summary, the existing lumbar support adjustment mechanism has the problems of not having a locking experience when adjusting the gear and being prone to accidental reset. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a guide groove reciprocating telescopic adjustment mechanism and an office chair, so as to solve the problems of existing lumbar support adjustment mechanisms that do not have a locking experience when adjusting the gear and are prone to accidental reset.

[0005] The first aspect of this utility model provides a guide groove reciprocating telescopic adjustment mechanism, comprising: a fixing member having a sliding cavity extending along the length direction of the fixing member, an opening at one end of the sliding cavity, a guide groove and multiple steps arranged along the length direction of the sliding cavity on the bottom surface of the sliding cavity; a sliding member having one end slidably disposed within the sliding cavity; a locking member hinged to the sliding member by a pin, the locking member having a rotating shaft hole and a torsion spring movable space; and a torsion spring comprising a spring coil, a first torsion arm disposed at one end of the spring coil, and a second torsion arm disposed at the other end of the spring coil, the end of the second torsion arm being bent into a straight hook, the spring coil passing through the pin, the first torsion arm being fixed to the sliding member, and the second torsion arm passing through the torsion spring. The movable space is provided and the straight hook is placed in the guide groove; the guide groove includes a first guide groove, a second guide groove and a third guide groove. The first guide groove is located on the bottom surface of the sliding cavity near the step and extends from the end of the bottom surface of the sliding cavity away from the opening to the end near the opening. The third guide groove is located on the bottom surface of the sliding cavity away from the step and extends from the end of the bottom surface of the sliding cavity near the opening to the end away from the opening. The second guide groove has a V-shaped structure and is used to connect the end of the first guide groove and the beginning of the third guide groove. The end of the third guide groove is connected to the beginning of the first guide groove. The depth of the third guide groove is less than the depth of the first guide groove and the second guide groove. The torsion spring drives the locking member to engage or disengage from the step as the straight hook moves along the guide groove.

[0006] Preferably, the first guide groove includes a first guide portion and a second guide portion. The first guide portion extends from the end of the bottom surface of the sliding cavity away from the opening towards the end closer to the opening and gradually approaches the step. The second guide portion extends from the end of the first guide portion towards the end closer to the opening, and the depth of the second guide portion gradually decreases from the beginning to the end. The second guide groove includes a third guide portion and a fourth guide portion. The third guide portion extends from the end of the second guide portion towards the side away from the step and gradually moves away from the opening of the sliding cavity. The depth of the beginning of the third guide portion is greater than the depth of the end of the second guide portion. The fourth guide portion extends from the end of the third guide portion towards the side away from the step and gradually moves away from the opening of the sliding cavity. The depth of the beginning of the third guide portion is greater than the depth of the end of the second guide portion. The first guide section has one end extending away from the step and gradually approaching the opening of the sliding cavity, which is connected to the beginning of the third guide section. The depth of the fourth guide section gradually decreases from the beginning to the end, and the depth of the beginning of the fourth guide section is greater than the depth of the end of the third guide section. The third guide section includes a fifth guide section and a sixth guide section. The fifth guide section extends from the end of the fourth guide section away from the opening, and the sixth guide section extends from the end of the fifth guide section away from the opening of the sliding cavity and gradually approaches the step, connecting to the beginning of the first guide section. The depths of both the fifth and sixth guide sections are less than the depth of the first guide section.

[0007] Preferably, the depth of the sixth guide portion gradually increases from the beginning to the end, and the depth of the end of the sixth guide portion is less than the depth of the beginning of the first guide portion.

[0008] Preferably, the first guiding part includes a plurality of sequentially connected guiding segments, the depth of which gradually decreases from the beginning to the end, and the depth of the end of the previous guiding segment is less than the depth of the beginning of the next guiding segment.

[0009] Preferably, the outer side of the third guide groove is provided with a protrusion to prevent the straight hook of the torsion spring from disengaging from the third guide groove.

[0010] Preferably, the step has a guide slope on the side away from the sliding cavity opening.

[0011] Preferably, the slider has an internal receiving groove for accommodating the first torsion arm.

[0012] Preferably, the sliding cavity is further provided with a collision-resistant soft rubber component, which is fixed to the side wall of the sliding cavity opposite to the end of the sliding component.

[0013] Preferably, the anti-collision soft rubber part adopts an I-shaped structure, and a T-shaped groove adapted to the anti-collision soft rubber part is formed on the side wall opposite to the end of the sliding cavity.

[0014] The second aspect of this utility model provides an office chair with the aforementioned guide groove reciprocating telescopic adjustment mechanism.

[0015] The aforementioned office chair and its reciprocating telescopic adjustment mechanism, when the sliding member slides relative to the fixed member to adjust the position, will drive the straight hook of the torsion spring to move along the first guide groove. During this process, the torsion spring will continuously apply a downward force to the locking member, driving the locking member to press tightly against the step. Before the locking member moves to the next step, it will fall from the previous step, hitting the fixed member and making an impact sound, thus providing the user with a locking experience during position adjustment. In addition, when the sliding member slides to the limit position and is pushed in the opposite direction, the straight hook enters the second guide groove under the elastic force of the torsion spring itself, and moves along the second guide groove to the middle position of the second guide groove with the sliding member in the opposite direction. At this time, the locking member engages with the step under the drive of the torsion spring to achieve locking, which can prevent the sliding member from accidentally resetting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the reciprocating telescopic adjustment mechanism of the guide groove in one embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the guide groove reciprocating telescopic adjustment mechanism in one embodiment of the present utility model.

[0018] Figure 3 This is a schematic diagram of the split structure of the fixing member in one embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the fastener in one embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the assembly structure of the slider, locking member and torsion spring in one embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram of the locking mechanism in one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the torsion spring in one embodiment of the present invention;

[0023] Figure 8 This is a structural schematic diagram of an office chair according to one embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10-Fixed component, 11-Sliding cavity, 12-Step, 121-Guide slope, 13-First guide groove, 131-First guide part, 132-Second guide part, 14-Second guide groove, 141-Third guide part, 142-Fourth guide part, 15-Third guide groove, 151-Fifth guide part, 152-Sixth guide part, 16-Protrusion, 17-Operating window, 18-Closure cover, 19-Anti-collision soft rubber part, 20-Sliding component, 21-Hinge hole, 22-Accommodation groove, 30-Locking component, 31-Rotating shaft hole, 32-Torsion spring movable space, 40-Torsion spring, 41-Spring ring, 42-First torsion arm, 43-Second torsion arm, 44-Straight hook, 50-Pin, 100-Lumbar support adjustment mechanism, 101-Seat, 102-Backrest, 103-Lumbar support. Detailed Implementation

[0026] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] This utility model provides a guide groove reciprocating telescopic adjustment mechanism.

[0028] like Figure 1-7 As shown, in one embodiment of this utility model, the guide groove reciprocating telescopic adjustment mechanism includes a fixing member 10, a sliding member 20, a locking member 30, and a torsion spring 40. The fixing member 10 has a sliding cavity 11 extending along the length direction of the fixing member 10. One end of the sliding cavity 11 has an opening 111. The bottom surface of the sliding cavity 11 has a guide groove and multiple steps 12 arranged along the length direction of the sliding cavity 11. One end of the sliding member 20 is disposed in the sliding cavity 11 in a manner that allows it to slide along the length direction of the sliding cavity 11. The locking member 30 is hinged to the fixing member 20 by a pin 50. Inside the sliding member 20, the locking member 30 is provided with a rotating shaft hole 31 and a torsion spring movable space position 32; the torsion spring 40 includes a spring coil 41, a first torsion arm 42 provided at one end of the spring coil 41 and a second torsion arm 43 provided at the other end of the spring coil 41. The end of the second torsion arm 43 is bent to form a straight hook 44. The spring coil 41 passes through the pin 50. The first torsion arm 42 is fixed inside the sliding member 20. The second torsion arm 43 passes through the torsion spring movable space position 32 and the straight hook 44 is placed in the guide groove. The torsion spring drives the locking member to engage or disengage from the step as the straight hook moves along the guide groove.

[0029] Further, the guide groove includes a first guide groove 13, a second guide groove 14, and a third guide groove 15. The first guide groove 13 is located on the bottom surface of the sliding cavity 11 near the step 12 and extends from the end of the bottom surface of the sliding cavity 11 away from the opening 111 to the end near the opening 111. The third guide groove 15 is located on the bottom surface of the sliding cavity 11 away from the step 12 and extends from the end of the bottom surface of the sliding cavity 11 near the opening 111 to the end away from the opening 111. The second guide groove 14 has a V-shaped structure and is used to connect the end of the first guide groove 13 to the beginning of the third guide groove 15. The end of the third guide groove 15 is connected to the beginning of the first guide groove 13. The depth of the third guide groove 15 is less than the depth of the first guide groove 13.

[0030] Furthermore, the first guide groove 13 includes a first guide portion 131 and a second guide portion 132. The first guide portion 131 extends from the bottom surface of the sliding cavity 11 away from the opening 111 towards the end closer to the opening 111 and gradually approaches the side of the step 12. The second guide portion 132 extends from the end of the first guide portion 131 towards the end closer to the opening 111, and the depth of the second guide portion 132 gradually decreases from the beginning to the end. The second guide groove 14 includes a third guide portion 141 and a fourth guide portion 142. The third guide portion 141 extends from the end of the second guide portion 132 away from the step 12 and gradually moves away from the opening of the sliding cavity 11. The depth of the beginning of the third guide portion 141 is greater than the depth of the end of the second guide portion 132. The fourth guide portion 142 extends from the end of the third guide portion 141 away from the step 12 and gradually moves closer to the opening of the sliding cavity 11, connecting with the beginning of the third guide groove 15. The depth of the fourth guide portion 142 gradually decreases from the beginning to the end, and the depth of the beginning of the fourth guide portion 142 is greater than the depth of the end of the third guide portion 141. The third guide groove 15 includes a fifth guide portion 151 and a sixth guide portion 152. The fifth guide portion 151 extends from the end of the fourth guide portion 142 toward the end away from the opening 111. The sixth guide portion 152 extends from the end of the fifth guide portion 151 toward the end away from the opening of the sliding cavity 11 and gradually approaches the side of the step 12 to connect with the beginning of the first guide portion 131. The depths of the fifth guide portion 151 and the sixth guide portion 152 are both less than the depth of the first guide portion 131.

[0031] Furthermore, the depth of the sixth guide section 152 gradually increases from the beginning to the end, and the depth of the end of the sixth guide section 152 is less than the depth of the beginning of the first guide section 131.

[0032] Furthermore, the first guide section 131 includes a plurality of guide segments connected in sequence, the depth of which gradually decreases from the beginning to the end, and the depth of the end of the previous guide segment is less than the depth of the beginning of the next guide segment.

[0033] Furthermore, the outer side of the third guide groove 15 is provided with a protrusion 16 for preventing the straight hook 44 of the torsion spring 40 from disengaging from the third guide groove 15.

[0034] Furthermore, the step 12 is provided with a guide slope 121 on the side away from the opening 111 of the sliding cavity 11.

[0035] Furthermore, the two side walls of the slider 20 are provided with hinge holes 21, and the inside of the slider 20 is provided with a receiving groove 22 for accommodating the first torsion arm 42.

[0036] Furthermore, the top surface of the fixing member 10 is provided with an operation window 17, and a cover 18 is provided at the operation window 17. An anti-collision soft rubber component 19 is also provided inside the sliding cavity 11 of the fixing member 10. The anti-collision soft rubber component 19 is fixed to the side wall of the sliding cavity 11 opposite to the end of the sliding member 20, and is used to prevent the end of the sliding member 20 from impacting the side wall of the sliding cavity 11. In some preferred embodiments, the anti-collision soft rubber component 19 adopts an I-shaped structure, and correspondingly, a T-shaped groove adapted to the anti-collision soft rubber component 19 is provided on the side wall of the sliding cavity 11 opposite to the end of the sliding member 20.

[0037] The assembly process of the guide groove reciprocating telescopic adjustment mechanism of this utility model is as follows:

[0038] (1) First, lay the straight hook of the torsion spring 40 flat and pass it through the torsion spring movable space 32 of the locking part 30. Then rotate it 90 degrees and continue to move it forward until the center hole of the spring ring 41 of the torsion spring 40 is aligned with the rotating shaft hole 31. Then insert it into the sliding part 20. After the rotating shaft hole 31 of the locking part 30 is aligned with the hinge hole 21 on the sliding part 20, insert the pin 50. Then use the stamping and mortise method to press the two ends of the pin 50 together to make it firm and not loose.

[0039] (2) Align one end of the slider 20 with the opening 111 of the sliding cavity 11 of the fixing member 10, then lift the locking member 30 and the torsion spring 40 upward and hide them inside the slider 20, then push the slider 20 into the sliding cavity 11 of the fixing member 10, and put the straight hook 44 of the torsion spring 40 into the guide groove to cooperate.

[0040] (3) Install the anti-collision soft rubber part 19, then insert the front end of the cover 18 into the operation window 17 and align it. After the rear end of the cover 18 is pressed down and flush with the surface of the fixing part 10, drive in 2 self-tapping screws to fix the cover, and complete the assembly of the entire guide groove reciprocating telescopic adjustment mechanism. The sliding part 20 is pulled smoothly and the locking is crisp.

[0041] The working process of the guide groove reciprocating telescopic adjustment mechanism of this utility model is as follows:

[0042] (1) After the guide groove reciprocating telescopic adjustment mechanism is assembled, the torsion spring is always in a deformed state, continuously exerting a downward force on the locking member, driving the locking member to move towards the step. When the sliding member 20 slides relative to the fixed member 10 to adjust the gear, it will drive the straight hook 44 of the torsion spring 40 to move along the first guide groove 13. During this process, the torsion spring 40 will continuously apply a downward force to the locking member, driving the locking member 30 to press tightly against the step 12. Before the locking member 30 moves to the next step, it will fall from the previous step and hit the fixed member 10 to make a "click" impact sound, thus providing the user with a locking experience when adjusting the gear.

[0043] (2) When the straight hook 44 of the torsion spring 40 moves along the first guide groove 13, the torsion spring 40 will also apply a squeezing force to the side wall of the first guide groove 13 near the third guide groove 15. When the straight hook 44 moves along the first guide groove 13 to the end of the first guide groove 13, the straight hook 44 enters the second guide groove 14 under the action of the elastic force of the torsion spring 40 itself, and moves along the second guide groove 14 to the middle position of the second guide groove 14 with the sliding member 20 sliding in the opposite direction. At this time, the locking member 30 engages with the step 12 under the drive of the torsion spring 40 to achieve locking, and prevents the sliding member 20 from directly resetting.

[0044] (3) When it is necessary to reset the slider 20, first pull the slider 20 outward. At this time, the straight hook 44 of the torsion spring 40 slides along the fourth guide part 142 of the second guide groove 14 to the third guide groove 15. Since the depth of the third guide groove 15 is smaller than the depth of the first guide groove 13 and the second guide groove 14, the torsion spring 40 will have an upward movement, which will simultaneously drive the locking part 30 to lift upward. At this time, the locking part 30 disengages from the step 12 to complete the unlocking. Push the slider 20 in the opposite direction to reset it.

[0045] (4) During the reset process of the slider 20, the straight hook 44 of the torsion spring 40 moves along the third guide groove 15. When the straight hook 44 enters the inclined sixth guide part 152, the interaction between the sixth guide part 152 and the torsion spring 40 causes one end of the torsion spring 40 to deform. This deformation allows the torsion spring 40 to apply a force toward the first guide groove 13. When the slider 20 is fully reset, the torsion spring 40 drives the straight hook 44 to disengage from the sixth guide part 152 of the third guide groove 15 and fall into the first guide groove 13 under its own force. Since there is a height difference between the first guide groove 13 and the third guide groove 15, when the straight hook 44 of the torsion spring 40 falls into the first guide groove 13, it will also drive the locking part 30 to fall down and abut against the step 12.

[0046] The beneficial technical effects of this utility model are as follows:

[0047] (1) When the sliding member slides relative to the fixed member to adjust the gear, it will drive the straight hook 44 of the torsion spring 40 to move along the first guide groove 13. During this process, the torsion spring 40 will continuously apply a downward force to the locking member, driving the locking member 30 to press tightly against the step 12. Before the locking member 30 moves to the next step, it will fall from the previous step and hit the fixed member 10 to make a "click" impact sound, thereby providing the user with a locking experience when adjusting the gear.

[0048] (2) When the slider slides to the limit position and pushes the slider 20 in the opposite direction, the straight hook 44 enters the second guide groove 14 under the elastic force of the torsion spring 40, and moves along the second guide groove 14 to the middle position of the second guide groove 14 as the slider 20 slides in the opposite direction. At this time, the locking member 30 engages with the step 12 under the drive of the torsion spring 40 to achieve locking, which can prevent the slider 20 from being accidentally reset.

[0049] This utility model also provides an office chair, such as Figure 8 As shown, the office chair includes a seat 101, a backrest 102, a lumbar support 103, and a lumbar support adjustment mechanism 100. The upper end of the lumbar support 103 is hinged to the upper end of the backrest 102, the lower end of the lumbar support 103 is hinged to one end of the lumbar support adjustment mechanism 100, and the other end of the lumbar support adjustment mechanism 100 is hinged to the lower end of the backrest 102. The lumbar support adjustment mechanism 100 adopts... Figure 1-7 The guide groove reciprocating telescopic adjustment mechanism in the illustrated embodiment.

[0050] 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 way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments. All equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present utility model.

Claims

1. A guide groove reciprocating telescopic adjustment mechanism, characterized in that, include: A fixing component has a sliding cavity extending along the length direction of the fixing component. One end of the sliding cavity has an opening, and the bottom surface of the sliding cavity has a guide groove and multiple steps arranged along the length direction of the sliding cavity. A slider, one end of which is disposed within the sliding cavity in a manner that allows it to slide along the length direction of the sliding cavity; A locking component is hinged to the inside of the sliding component via a pin. The locking component is provided with a rotating shaft hole and a torsion spring movable space. A torsion spring includes a spring coil, a first torsion arm at one end of the spring coil, and a second torsion arm at the other end of the spring coil. The end of the second torsion arm is bent to form a straight hook. The spring coil passes through the pin. The first torsion arm is fixed to a sliding member. The second torsion arm passes through the movable space of the torsion spring and the straight hook is placed in the guide groove. The guide groove includes a first guide groove, a second guide groove, and a third guide groove. The first guide groove is located on the bottom surface of the sliding cavity near the step and extends from the end of the bottom surface of the sliding cavity away from the opening to the end near the opening. The third guide groove is located on the bottom surface of the sliding cavity away from the step and extends from the end of the bottom surface of the sliding cavity near the opening to the end away from the opening. The second guide groove has a V-shaped structure and is used to connect the end of the first guide groove and the beginning of the third guide groove. The end of the third guide groove is connected to the beginning of the first guide groove. The depth of the third guide groove is less than the depth of the first guide groove and the second guide groove. The torsion spring drives the locking member to engage or disengage from the step as the straight hook moves along the guide groove.

2. The guide groove reciprocating telescopic adjustment mechanism as described in claim 1, characterized in that, The first guide groove includes a first guide portion and a second guide portion. The first guide portion extends from the end of the bottom surface of the sliding cavity away from the opening towards the end closer to the opening and gradually approaches the step. The second guide portion extends from the end of the first guide portion towards the end closer to the opening, and the depth of the second guide portion gradually decreases from the beginning to the end. The second guide groove includes a third guide portion and a fourth guide portion. The third guide portion extends from the end of the second guide portion towards the side away from the step and gradually moves away from the opening of the sliding cavity. The depth of the beginning of the third guide portion is greater than the depth of the end of the second guide portion. The fourth guide portion extends from the end of the third guide portion towards the side closer to the opening. The fourth guide portion extends away from the step and gradually approaches the opening of the sliding cavity, connecting to the beginning of the third guide portion. The depth of the fourth guide portion gradually decreases from the beginning to the end, and the depth of the beginning of the fourth guide portion is greater than the depth of the end of the third guide portion. The third guide portion includes a fifth guide portion and a sixth guide portion. The fifth guide portion extends from the end of the fourth guide portion toward the end away from the opening, and the sixth guide portion extends from the end of the fifth guide portion toward the end away from the opening of the sliding cavity and gradually approaches the step, connecting to the beginning of the first guide portion. The depths of both the fifth and sixth guide portions are less than the depth of the first guide portion.

3. The guide groove reciprocating telescopic adjustment mechanism as described in claim 2, characterized in that, The depth of the sixth guide section gradually increases from the beginning to the end, and the depth of the end of the sixth guide section is less than the depth of the beginning of the first guide section.

4. The guide groove reciprocating telescopic adjustment mechanism as described in claim 3, characterized in that, The first guiding part includes a plurality of guiding segments connected in sequence. The depth of the guiding segments gradually decreases from the beginning to the end, and the depth of the end of the previous guiding segment is less than the depth of the beginning of the next guiding segment.

5. The guide groove reciprocating telescopic adjustment mechanism as described in any one of claims 2-4, characterized in that, The outer side of the third guide groove is provided with a protrusion to prevent the straight hook of the torsion spring from disengaging from the third guide groove.

6. The guide groove reciprocating telescopic adjustment mechanism as described in claim 1, characterized in that, The step is provided with a guide slope on the side away from the opening of the sliding cavity.

7. The guide groove reciprocating telescopic adjustment mechanism as described in claim 1, characterized in that, The slider has a receiving groove inside for accommodating the first torsion arm.

8. The guide groove reciprocating telescopic adjustment mechanism as described in claim 1, characterized in that, The sliding cavity is also provided with a collision-resistant soft rubber component, which is fixed to the side wall of the sliding cavity opposite to the end of the sliding component.

9. The guide groove reciprocating telescopic adjustment mechanism as described in claim 8, characterized in that, The anti-collision soft rubber part adopts an I-shaped structure, and a T-shaped groove adapted to the anti-collision soft rubber part is opened on the side wall opposite to the end of the sliding cavity.

10. An office chair, characterized in that, Includes the guide groove reciprocating telescopic adjustment mechanism as described in any one of claims 1-9.

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